Lens assembly and camera module

Abstract

The utility model relates to a lens assembly and a camera module, the lens assembly comprises a lens main body and a light-transmitting vibrating membrane, the lens main body comprises a lens barrel, a protection lens and a lens group, the protection lens is connected with the light inlet end of the lens barrel, the lens group is assembled in the lens barrel, and the light-transmitting vibrating membrane is attached to the object side surface of the protection lens. Compared with the prior art, the lens assembly has the advantages that firstly, the light-transmitting vibrating membrane also protects the protective lens and is beneficial to preventing scratching, secondly, the light-transmitting vibrating membrane is in direct contact with smudginess, the cleaning efficiency is high, moreover, the light-transmitting vibrating membrane does not occupy the installation space of the lens group, upgrading of the camera module is facilitated, and finally, the light-transmitting vibrating membrane is light in weight, and the weight of the whole lens assembly is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of camera cleaning, in particular to a lens assembly and a camera module. Background Art

[0002] The on-board camera is an important tool to assist the driver in driving or parking, and can eliminate the driver's visual blind spots. When driving in rainy days or outdoors, the lens is easily covered with dirt, which will affect the driving vision to a certain extent. If the dirt is not cleaned in time, it is easy to stick to the lens, making secondary cleaning difficult. Forced cleaning and wiping can also easily damage the lens.

[0003] At present, lens cleaning is mainly done externally by manual scrubbing or adding external cleaning equipment. The manual scrubbing method has a certain lag, and adding external cleaning equipment not only increases the volume of the entire camera assembly, but also requires a corresponding fixed structure, which is complicated to assemble. The piezoelectric ceramics in the existing ultrasonic cleaning method need to be connected to the lens transmission. This indirect vibration method has high energy consumption, and space must be reserved in the camera for the installation of the piezoelectric ceramics. When the size of the camera needs to be further expanded and upgraded, this creates an obstacle. Utility Model Content

[0004] In view of the shortcomings of existing camera cleaning methods such as lag, high energy consumption and limitation on camera size upgrade, it is necessary to provide a lens assembly and camera module.

[0005] A lens assembly, comprising:

[0006] A lens body, comprising a lens barrel, a protective lens connected to a light-incoming end of the lens barrel, and a lens group assembled in the lens barrel; and

[0007] A light-transmitting vibration membrane is attached to the object side of the protective lens.

[0008] With such a configuration, firstly, the light-transmitting vibration membrane also protects the protective lens, which helps to prevent scratches; secondly, the light-transmitting vibration membrane directly contacts dirt and has high cleaning efficiency; thirdly, it does not occupy the installation space of the lens group, which facilitates the upgrade of the camera module; finally, the light-transmitting vibration membrane is also lighter, reducing the weight of the entire lens assembly.

[0009] In one embodiment, the lens barrel comprises a barrel shell and a limit sleeve detachably mounted on the light-incoming end of the barrel shell, a stop ring is disposed on the inner wall of the limit sleeve, and the protective lens is fixedly mounted on a side of the barrel shell facing the stop ring;

[0010] The light-transmitting vibration film comprises an adhesive layer attached to the object side of the protection lens, a vibration layer attached to the adhesive layer, and a protection layer attached to the vibration layer, and the protection layer abuts against the stop ring.

[0011] With such arrangement, when the limiting sleeve is used to fix the protective lens to the lens barrel, the protective layer abuts against the stop ring to prevent the vibration layer from being crushed.

[0012] In one embodiment, the protective layer and the adhesive layer are respectively provided with a first opening and a second opening matching the shape of the stop ring.

[0013] Such a setting can, on the one hand, increase the light intake, and on the other hand, enable the vibration layer to directly contact the dirt, thereby improving cleaning efficiency and reducing energy consumption.

[0014] In one embodiment, the vibration layer is a MEMS vibration film and the thickness of the MEMS vibration film is less than or equal to 0.05 mm.

[0015] With such a configuration, the use of the MEMS vibration film can reduce production costs while also taking into account both the light transmittance and vibration performance of the light-transmitting vibration film.

[0016] In one embodiment, the light-transmitting vibration membrane includes a vibration body and a plurality of electrode plates spaced apart and arranged around the vibration body.

[0017] With such an arrangement, damage to a single electrode plate will not cause overall failure of the light-transmitting vibration membrane, thereby improving the fault tolerance of the light-transmitting vibration membrane during operation.

[0018] In one of the embodiments, the width of the electrode plate gradually decreases in a direction away from the vibrating body.

[0019] With such arrangement, the electrode plate can be fully fitted with the protective lens, and wrinkles are small when the electrode plate is bent and fitted to the side wall of the protective lens.

[0020] In one embodiment, the inner wall of the limiting sleeve is provided with a plurality of gaps for accommodating the electrode plates.

[0021] With such an arrangement, the electrode plate of the light-transmitting vibration membrane will not be squeezed and broken, thereby protecting the electrode plate.

[0022] In one of the embodiments, the light-transmitting vibration membrane further includes a conductive ring plate located between the cylindrical shell and the protective lens, and the conductive ring plate is electrically connected to the electrode plate.

[0023] Such an arrangement optimizes the power supply circuit of the light-transmitting vibration membrane and reduces the difficulty of assembling the light-transmitting vibration membrane. That is to say, the installation positions of the multiple electrode plates can be placed arbitrarily as long as they can be electrically connected to the conductive ring plate.

[0024] The present application also provides a camera module, including:

[0025] Package shell;

[0026] A photosensitive component, the photosensitive component comprising a main circuit board fixed in the packaging shell, a photosensitive chip mounted on the circuit board, and a flexible circuit board electrically connected to the main circuit board; and

[0027] As a lens assembly as mentioned above, the lens assembly is installed in the packaging shell, the lens assembly is located in the photosensitive path of the photosensitive component and the transparent vibration membrane is electrically connected to the flexible circuit board.

[0028] With this arrangement, the light-transmitting vibration membrane and the photosensitive chip share the same main circuit board, resulting in a high degree of integration.

[0029] In one embodiment, the lens body has a clearance groove penetrating through the inner wall of the lens barrel along the axial direction of the lens barrel, and the flexible circuit board is accommodated in the clearance groove.

[0030] With such an arrangement, the flexible circuit board is protected by the lens barrel, and no interference is caused to the installation of the lens group. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure of a camera module in an embodiment provided in this application;

[0032] Figure 2 for Figure 1 The camera module is shown in a cross-sectional view along the AA direction;

[0033] Figure 3 for Figure 2 A partial enlarged view of the X in the middle;

[0034] Figure 4 for Figure 1 The schematic diagram of the structure of the camera module shown here is without the protective lens;

[0035] Figure 5 for Figure 1 Schematic diagram of the structure of the medium light-transmitting vibration membrane;

[0036] Figure 6 for Figure 5 A cross-sectional view of the light-transmitting vibration membrane in the BB direction;

[0037] Figure 7 A schematic diagram of the planar structure of a camera module in another embodiment provided in the present application.

[0038] Reference numerals:

[0039] 10. Lens assembly; 11. Lens body; 111. Lens barrel; 1111. Barrel shell; 11111. Make way groove; 1112. Limit sleeve; 11121. Stop ring; 11122. Make way gap; 112. Protective lens; 12. Light-transmitting vibration membrane; 1201. Vibration layer; 1202. Adhesive layer; 12021. First opening; 1203. Protective layer; 12031. Second opening; 121. Vibration body; 122. Electrode plate; 123. Conductive ring plate; 20. Photosensitive assembly; 21. Main circuit board; 22. Photosensitive chip; 23. Flexible circuit board; 30. Packaging shell. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0041] 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 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] 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 a central 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 a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0046] The on-board camera is an important tool to assist the driver in driving or parking, and can eliminate the driver's visual blind spots. When driving in rainy days or outdoors, the lens is easily covered with dirt, which will affect the driving vision to a certain extent. If the dirt is not cleaned in time, it is easy to stick to the lens, making secondary cleaning difficult. Forced cleaning and wiping can also easily damage the lens.

[0047] At present, lens cleaning is mainly done externally by manual scrubbing or adding external cleaning equipment. The manual scrubbing method has a certain lag, and adding external cleaning equipment not only increases the volume of the entire camera assembly, but also requires a corresponding fixed structure, which is complicated to assemble. The piezoelectric ceramics in the existing ultrasonic cleaning method need to be connected to the lens transmission. This indirect vibration method has high energy consumption, and space must be reserved in the camera for the installation of the piezoelectric ceramics. When the size of the camera needs to be further expanded and upgraded, this creates an obstacle.

[0048] Based on this, it is necessary to provide a lens assembly 10 and a camera module that can be cleaned promptly and efficiently and is convenient for subsequent upgrading of the lens size.

[0049] See also Figure 1 , Figure 1 The camera module provided in the present application comprises a packaging shell 30 , a photosensitive component 20 and a lens component 10 .

[0050] Please read further Figure 2 , Figure 2 for Figure 1 The camera module is shown in a cross-sectional view along the AA direction. The lens assembly 10 includes a lens body 11 and a light-transmitting vibration membrane 12. The lens body 11 includes a lens barrel 111, a protective lens 112 and a lens group. The protective lens 112 is connected to the light-incoming end of the lens barrel 111. The lens group is assembled in the lens barrel 111. The light-transmitting vibration membrane 12 is attached to the object side of the protective lens 112. This arrangement has at least the following advantages: first, the light-transmitting vibration membrane 12 attached to the object side of the protective lens 112 can better protect the lens 112, that is, it provides additional protection for the protective lens 112, which is beneficial to prevent the protective lens 112 from being scratched, thereby extending the service life of the protective lens 112; secondly, the light-transmitting vibration membrane 12 is in direct contact with dirt, the vibration transmission path is short, the cleaning efficiency is high, and it is more energy-saving; thirdly, the light-transmitting vibration membrane 12 is located on the object side of the protective lens 112, rather than in the lens barrel 111, which reduces the occupation of the installation space of the lens group, and is beneficial to the subsequent expansion and upgrading of the lens size; finally, the light-transmitting vibration membrane 12 is relatively light in weight, and the overall weight of the entire lens assembly 10 is also relatively small, so the overall connection stability is relatively high after the camera module is assembled.

[0051] For details, please refer to Figure 2 The photosensitive component 20 includes a main circuit board 21, a photosensitive chip 22 and a flexible circuit board 23. The main circuit board 21 is fixed to the packaging shell 30, the photosensitive chip 22 is mounted on the circuit board, and the two ends of the flexible circuit board 23 are respectively electrically connected to the main circuit board 21 and the light-transmitting vibration membrane 12. In this way, the light-transmitting vibration membrane 12 and the photosensitive chip 22 share the same main circuit board 21, and the integration is relatively high.

[0052] Further, in an embodiment provided in the present application, the lens body 11 has a clearance groove 11111 penetrating the inner wall of the lens barrel 111 along the axial direction of the lens barrel 111, and the flexible circuit board 23 is accommodated in the clearance groove 11111. In this way, the flexible circuit board 23 is protected by the lens barrel 111, and the installation of the lens group will not be interfered.

[0053] It is understandable that, in other embodiments, the lens body 11 may also be provided with a mounting through hole that passes through the inner wall of the lens barrel 111 along the axial direction of the lens barrel 111 , and the flexible circuit board 23 is passed through the mounting through hole.

[0054] Please refer again Figure 3 , Figure 5 and Figure 6 , Figure 3 for Figure 2 A partial enlarged view of the X in the middle. Figure 5 for Figure 1 A schematic diagram of the structure of the middle light-transmitting vibration membrane 12, Figure 6 for Figure 5 The cross-sectional view of the light-transmitting vibration membrane 12 in the BB direction is shown. Specifically, in one embodiment provided in the present application, the lens barrel 111 includes a barrel shell 1111 and a limiting sleeve 1112. The limiting sleeve 1112 is detachably sleeved on the light-incoming end of the barrel shell 1111. The inner wall of the limiting sleeve 1112 is provided with a stop ring 11121. The protective lens 112 is fixedly arranged on the side of the barrel shell 1111 facing the stop ring 11121. The light-transmitting vibration membrane 12 includes a vibration layer 1201, an adhesive layer 1202 and a protective layer 1203. The adhesive layer 1202 is attached to the object side of the protective lens 112. The vibration layer 1201 is attached to the adhesive layer 1202. The protective layer 1203 is attached to the vibration layer 1201. The protective layer 1203 abuts against the stop ring 11121. When the limiting sleeve 1112 is used to fix the protective lens 112 to the lens barrel 111, the protective layer 1203 abuts against the stop ring 11121 to prevent the vibration layer 1201 from being crushed. Further, the protective layer 1203 is a flexible member, which can also reduce the vibration transmission between the vibration layer 1201 and the limiting sleeve 1112, and prevent the hard limiting sleeve 1112 from crushing the vibration layer 1201.

[0055] Optionally, in an embodiment provided in the present application, the limiting sleeve 1112 is threadedly connected to the lens barrel 111. This facilitates disassembly and assembly. Further, the limiting sleeve 1112 may also be provided with a limiting buckle inside, and the outer wall of the lens barrel 111 may also be provided with a groove matched with the limiting buckle to increase the integrity of the entire lens body 11 after the limiting sleeve 1112 and the lens barrel 111 are connected.

[0056] Please refer again Figure 6 Optionally, in an embodiment provided in the present application, the protective layer 1203 and the adhesive layer 1202 are respectively provided with a first opening 12021 and a second opening 12031 that match the shape of the stop ring 11121. This can increase the light intake on the one hand, and on the other hand, can make the vibration layer 1201 directly contact the dirt, thereby improving the cleaning efficiency and reducing energy consumption.

[0057] Optionally, in the present application, the vibration layer 1201 is a MEMS vibration film and the thickness of the MEMS vibration film is less than or equal to 0.05 mm. The use of the MEMS vibration film can reduce production costs and can also take into account the light transmittance and vibration performance of the light-transmitting vibration film 12.

[0058] See also Figure 3 and Figure 5 In one embodiment provided in the present application, the light-transmitting vibration membrane 12 includes a vibration body 121 and a plurality of electrode plates 122 arranged at intervals around the vibration body 121. Damage to a single electrode plate 122 will not cause the overall failure of the light-transmitting vibration membrane 12, thereby improving the fault tolerance of the light-transmitting vibration membrane 12 during operation.

[0059] Furthermore, in an embodiment provided in the present application, the width of the electrode plate 122 gradually decreases in a direction away from the vibration body 121. In this way, the electrode plate 122 can be fully fitted with the protective lens 112, and the electrode plate 122 has small wrinkles when it is bent and fitted to the side wall of the protective lens 112.

[0060] See also Figure 7 , Figure 7 A schematic diagram of the planar structure of a camera module in another embodiment provided by the present application. Optionally, in an embodiment provided by the present application, the inner wall of the limiting sleeve 1112 is provided with a plurality of clearance notches 11122 for accommodating the electrode plate 122. In this way, the electrode plate 122 of the light-transmitting vibration membrane 12 will not be squeezed and broken, thereby protecting the electrode plate 122.

[0061] Please also read Figure 2 and Figure 4 , Figure 4 for Figure 1 The camera module shown is a structural schematic diagram without the protective lens 112. Optionally, in an embodiment provided in the present application, the light-transmitting vibration membrane 12 also includes a conductive ring plate 123 located between the cylindrical shell 1111 and the protective lens 112. The conductive ring plate 123 is electrically connected to the electrode plate 122. By uniformly connecting the plurality of electrode plates 122 to the conductive ring plate 123, the power supply circuit of the light-transmitting vibration membrane 12 is optimized and the difficulty of assembling the light-transmitting vibration membrane 12 is reduced. That is to say, the installation positions of the plurality of electrode plates 122 can be arbitrarily placed as long as they can be electrically connected to the conductive ring plate 123.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0063] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A lens assembly, characterized in that: include: The lens body comprises a lens barrel, a protective lens connected to the light-incoming end of the lens barrel, and a lens group assembled in the lens barrel; and A light-transmitting vibration membrane is attached to the object side of the protective lens.

2. A lens assembly according to claim 1, characterized in that: The lens barrel comprises a barrel shell and a limit sleeve detachably sleeved on the light-incoming end of the barrel shell, a stop ring is arranged on the inner wall of the limit sleeve, and the protective lens is fixedly arranged on a side of the barrel shell facing the stop ring; The light-transmitting vibration film comprises an adhesive layer attached to the object side of the protection lens, a vibration layer attached to the adhesive layer, and a protection layer attached to the vibration layer, and the protection layer abuts against the stop ring.

3. A lens assembly according to claim 2, characterized in that: The protective layer and the adhesive layer are respectively provided with a first opening and a second opening matching the shape of the stop ring.

4. A lens assembly according to claim 3, characterized in that: The vibration layer is a MEMS vibration film and the thickness of the MEMS vibration film is less than or equal to 0.05 mm.

5. A lens assembly according to any one of claims 2 to 4, characterized in that: The light-transmitting vibration film includes a vibration body and a plurality of electrode plates which are arranged around the vibration body at intervals.

6. A lens assembly according to claim 5, characterized in that: The width of the electrode plate gradually decreases in a direction away from the vibration body.

7. A lens assembly according to claim 5, characterized in that: The inner wall of the limiting sleeve is provided with a plurality of gaps for accommodating the electrode plates.

8. The lens assembly according to claim 5, characterized in that: The light-transmitting vibration membrane further comprises a conductive ring plate located between the cylindrical shell and the protective lens, and the conductive ring plate is electrically connected to the electrode plate.

9. A camera module, characterized in that: include: Package shell; A photosensitive component, the photosensitive component comprising a main circuit board fixed in the packaging shell, a photosensitive chip mounted on the circuit board, and a flexible circuit board electrically connected to the main circuit board; and A lens assembly as described in any one of claims 1-8, wherein the lens assembly is installed in the packaging shell, the lens assembly is located in the photosensitive path of the photosensitive component and the transparent vibration membrane is electrically connected to the flexible circuit board.

10. A camera module according to claim 9, characterized in that: The lens body has a clearance groove which penetrates the inner wall of the lens barrel along the axial direction of the lens barrel, and the flexible circuit board is accommodated in the clearance groove.

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