Image module with front optical filter

Abstract

The utility model relates to the technical field of cameras, and provides an image module with a front optical filter, which comprises an optical filter, a lens assembly, an image photosensitive assembly and a sealing assembly, the optical filter is arranged on one side, far away from the image photosensitive assembly, of the lens assembly, the sealing assembly covers the lens assembly, and the sealing assembly is arranged on the other side of the lens assembly. And the optical filter is sealed in the sealing assembly. According to the image module with the front optical filter provided by the utility model, the optical filter is externally arranged, so that the size of the optical filter can be reduced, the mechanical feasibility strength of a product can be improved, the use cost of materials can be reduced, the back focus of the lens can be further reduced, and the height of the module is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of cameras, in particular to an image module of a front filter. Background Art

[0002] In the IoT sector, the use of intelligent imaging modules to capture visual images as part of signal acquisition has become essential. Due to the complexity of the ambient light conditions involved, image acquisition modules must operate 24 / 7. To cope with these complex environments, camera modules require movable filters to adjust the transmitted light to suit shooting needs. Existing designs utilize a drawer-type filter switch, which moves the filter horizontally, enabling the use of filters with different wavelengths in different lighting conditions. However, these products are relatively large, resulting in high material costs. They occupy a significant portion of the internal space of the end product, and the accompanying motherboard module is large and costly. Given the demand for miniaturization, existing designs present drawbacks, preventing module size reduction and failing to meet the demands of end-use scenarios. Furthermore, due to economic downturns, the consumer market is more sensitive to cost than performance, but current material costs cannot be further reduced.

[0003] In addition, in the existing technology, the filter is usually installed between the lens and the image photosensitive chip. The object scene light is transmitted through the pupil above the lens to the lens light outlet and then passes through the filter to reach the surface of the image chip for imaging. In this design, the size of the filter must be greater than or equal to the surface area of the photosensitive area of the image chip, and the size cannot be reduced. Moreover, when the photosensitive area of the chip is increased, the filter must also be increased synchronously. The risk of damage to the filter when it is impacted by external force is high. Utility Model Content

[0004] The purpose of the present invention is to provide an imaging module with a pre-filter, which can at least solve some of the defects in the prior art.

[0005] To achieve the above-mentioned purpose, an embodiment of the present utility model provides the following technical solution: an imaging module with a front filter, comprising a filter, a lens assembly and an image photosensitive assembly, and also comprising a sealing assembly, wherein the filter is arranged on the side of the lens assembly away from the image photosensitive assembly, the sealing assembly cover is arranged on the lens assembly, and the filter is sealed in the sealing assembly.

[0006] Furthermore, the lens assembly includes a lens, and the filter is arranged in front of the lens.

[0007] Furthermore, it also includes a mounting bracket, the lens is arranged on the mounting bracket, and the sealing assembly is fixed on the mounting bracket.

[0008] Furthermore, the sealing assembly includes a sealing ring, which is threadedly connected to the mounting bracket.

[0009] Furthermore, the sealing assembly also includes a protective sheet provided on a side of the sealing ring away from the lens.

[0010] Furthermore, it also includes a fixing frame, and the mounting bracket is threadedly connected to the fixing frame.

[0011] Furthermore, the fixing frame is provided with screw holes.

[0012] Furthermore, the lens assembly also includes a base, the lens is arranged on the base, and the image sensing component is arranged on a side of the base away from the lens.

[0013] Furthermore, the image sensing component includes an image sensing chip and a signal conveying belt connected to the image sensing chip.

[0014] Furthermore, it also includes a filter rotation switching device for driving the filter to rotate.

[0015] Compared with the existing technology, the beneficial effects of the present invention are: an imaging module with a front filter can reduce the size of the filter by placing the filter externally, which can not only improve the mechanical feasibility strength of the product but also reduce the material usage cost, and the back focus of the lens can be further reduced, and the height of the module is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a filter rotation switching device provided by an embodiment of the present invention from a first viewing angle (the mounting bracket is not shown);

[0017] Figure 2 A second perspective schematic diagram of a filter rotation switching device provided by an embodiment of the present utility model (the mounting bracket is not shown);

[0018] Figure 3 A schematic diagram of the cooperation between a filter rotation switching device and a lens assembly provided by an embodiment of the present utility model;

[0019] Figure 4 A schematic diagram of a first-viewing angle of view of an imaging module provided by an embodiment of the present utility model (fixed frame not shown);

[0020] Figure 5 A schematic diagram of a second viewing angle of an imaging module provided by an embodiment of the present utility model (the fixing frame is not shown);

[0021] Figure 6 A schematic diagram of a mounting bracket for a filter rotation switching device provided in an embodiment of the present utility model;

[0022] Figure 7 A schematic diagram of the cooperation between the lens assembly and the rotating bracket of an imaging module provided by an embodiment of the present utility model (reflecting the state when the rotating bracket is not rotating);

[0023] Figure 8 A schematic diagram of the cooperation between the lens assembly of an imaging module and a rotating bracket provided in an embodiment of the present utility model (reflecting the state of the rotating bracket during rotation);

[0024] Figure 9 A schematic diagram of the cooperation between the lens assembly and the rotating bracket of an imaging module provided by an embodiment of the present utility model (reflecting the state after the rotating bracket has completed rotation);

[0025] Figure 10 For the general Figure 7 、 Figure 8 and Figure 9 A schematic diagram showing the state changes of the three states together;

[0026] Figure 11 A schematic diagram of a first-view perspective of an imaging module provided by an embodiment of the present utility model with the mounting bracket removed;

[0027] Figure 12 A schematic diagram of a second viewing angle of an imaging module provided by an embodiment of the present utility model with the mounting bracket removed;

[0028] Figure 13 A schematic diagram of a sealing assembly of an imaging module provided by an embodiment of the present invention from a first perspective;

[0029] Figure 14 A schematic diagram of a sealing assembly of an imaging module provided by an embodiment of the present invention from a second perspective;

[0030] Figure 15 A schematic diagram of a protective sheet of a sealing assembly of an imaging module provided by an embodiment of the present utility model;

[0031] Figure 16 A schematic diagram of the coordination of a filter, a lens assembly, and an image sensing assembly of an imaging module provided by an embodiment of the present utility model;

[0032] Figure 17 A schematic diagram of an image sensing component of an imaging module provided by an embodiment of the present invention;

[0033] In the accompanying drawings: 1-rotating bracket; 10-placement ring; 100-limiting hole; 11-driving frame; 110-U-shaped slot; 2-driving mechanism; 20-swing arm; 21-electromagnetic motor; 3-mounting bracket; 30-limiting column; 31-inner cavity; 32-hole; 33-limiting plate; 34-opening; 4-sealing assembly; 40-sealing ring; 41-protective sheet; 5-lens assembly; 50-lens; 51-base; 6-fixing frame; 60-screw hole; 7-image sensitive assembly; 70-signal conveyor belt; 71-image sensitive chip; 8-filter. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] See also Figures 1 to 15 The present invention provides a filter rotation switching device, comprising a rotating bracket 1 and a driving mechanism 2 for driving the rotating bracket 1 to rotate. The rotating bracket 1 has a mounting ring 10 for mounting a filter 8 and a driving frame 11 driven to rotate by the driving mechanism 2. The mounting ring 10 is connected to the driving frame 11. In this embodiment, through the cooperation between the rotating bracket 1 and the driving mechanism 2, the filter 8 can be switched by rotation. Compared with the traditional drawer-type switching method, the volume of the module can be greatly reduced, and a miniaturized imaging module is ultimately obtained. Specifically, the mounting ring 10 has an area for mounting the filter 8. The filter 8 is bonded to the mounting ring 10 by adhesive. The shape of the mounting ring 10 can be designed according to the shape of the filter 8. For example, the filter 8 shown in this embodiment is circular, so the area of the mounting ring for mounting the filter 8 can be designed to be annular. The sizes of the two can also be matched as needed. When the filter 8 is mounted on the mounting ring of the rotating bracket 1, the driving mechanism 2 provides rotational power to the driving frame 11, and the driving frame 11 drives the mounting ring 10 to rotate. The rotation method is as follows: Figures 7 to 10As shown, the rotating bracket 1 is gradually rotated to the front of the lens 50 of the lens assembly 5. When filtering is required, the filter 8 is rotated to the front of the lens 50. When filtering is not required, the filter 8 is rotated away from the lens 50. This embodiment only shows the case of one rotating bracket 1. When multiple filters 8 are required, multiple rotating brackets 1 can be designed. The spacing between the rotating brackets 1 is sufficient to avoid overlapping between the filters 8. The driving mechanism 2 does not need to be changed, but the driving frame 11 can be designed as a connecting rod frame as needed. In this way, one driving mechanism 2 can drive multiple rotating brackets 1 to rotate.

[0036] As an optimization solution of the embodiment of the utility model, please refer to Figures 1 to 15 The mounting ring 10 is provided with a limiting hole 100, the central axis of which is parallel to the rotation axis of the mounting ring 10. In this embodiment, the limiting hole 100 is designed to limit the rotation path of the rotating bracket 1. A limiting post 30 corresponding to the limiting hole 100 can be designed on the mounting bracket 3. The limiting post 30 is rotatably mounted in the limiting hole 100. In this way, when the driving mechanism 2 drives the mounting ring 10 to rotate, the mounting ring 10 can rotate about the limiting post 30.

[0037] As an optimization solution of the embodiment of the utility model, please refer to Figures 1 to 15 The drive mechanism 2 includes a swing arm 20 and an electromagnetic motor 21 that drives the swing arm 20 to swing. The swing arm 20 is mounted on the drive frame 11. In this embodiment, the drive mechanism 2 uses an existing electromagnetic motor 21. The electromagnetic motor 21 can output electromagnetic thrust to transfer kinetic energy to the swing arm 20. The swing of the swing arm 20 drives the rotating bracket 1 to rotate. The driving method here is similar to the rotation of existing gears, where a lever drives the gears to rotate one tooth at a time. This driving method is based on existing technology. There are many existing methods for achieving rotation of the rotating bracket 1, which will not be described in detail here.

[0038] To further optimize the above solution, please refer to Figures 1 to 15 The driving frame 11 has a U-shaped slot 110 for the swing arm 20 to be inserted into. In this embodiment, the driving frame 11 is provided with a U-shaped slot 110, which can facilitate the installation of the swing arm 20. Whether the swing arm 20 is fixed in the U-shaped slot 110 can be selected according to needs.

[0039] As an optimization solution of the embodiment of the utility model, please refer to Figures 1 to 15, the device also includes a mounting bracket 3, and the rotating bracket 1 and the driving mechanism 2 are both mounted on the mounting bracket 3. In this embodiment, the mounting bracket 3 is provided for the installation of the rotating bracket 1 and the driving mechanism 2. Preferably, the mounting bracket 3 is a cylindrical structure having an inner cavity 31, and the driving mechanism 2 is arranged in the inner cavity 31. The placement ring 10 is provided on one end surface of the mounting bracket 3, and the end surface has a hole 32 for the driving frame 11 to extend into the inner cavity 31. An arc-shaped limit plate 33 is provided on the end surface, and the placement ring 10 slides and contacts the inner ring of the limit plate 33 when rotating. An opening 34 is also provided on the end surface for the lens assembly 5 to be installed. The mounting bracket 3 is cylindrical, with a large opening 34 at one end to facilitate the insertion of the drive mechanism 2 into the inner cavity 31. One end has a solid surface, but this surface also includes a hole 32 and an opening 34. The hole 32 facilitates the insertion of the drive frame 11 into the inner cavity 31 and connection with the drive mechanism 2, while the opening 34 facilitates the exposure of the lens 50. A stop plate 33 is also provided on the end surface to provide both a stop and a guide.

[0040] As an optimization solution of the embodiment of the utility model, please refer to Figures 1 to 15 , the placement ring 10 and the drive frame 11 are in an L-shaped structure. In this embodiment, the placement ring 10 and the drive frame 11 are arranged in an L-shape, which can make the structural design more compact.

[0041] See also Figures 1 to 15 The present invention provides an imaging module comprising a filter 8 and the aforementioned filter rotation and switching device, wherein the filter 8 is mounted on the mounting ring 10. In this embodiment, the aforementioned filter rotation and switching device is used in the imaging module to provide a method for rotating and switching the filter 8, thereby reducing the size of the imaging module.

[0042] As an optimization solution of the embodiment of the utility model, please refer to Figures 1 to 15, also includes a sealing component 4 for sealing an external optical filter 8, a lens component 5 and an image photosensitive component 7, the optical filter 8 is arranged on the side of the lens component 5 away from the image photosensitive component 7, the sealing component 4 is covered on the lens component 5, and the optical filter 8 is sealed in the sealing component 4. In this embodiment, the sealing component 4 can protect the external optical filter 8. Preferably, the lens component 5 includes a lens 50, the optical filter 8 is arranged in front of the lens 50, the lens 50 is arranged on the mounting bracket 3, and the sealing component 4 is fixed on the mounting bracket 3. The sealing component 4 includes a sealing ring 40, and the sealing ring 40 is threadedly connected to the mounting bracket 3. The sealing component 4 also includes a protective sheet 41 provided on the side of the sealing ring 40 away from the lens 50. By externalizing filter 8 and moving its mounting position from the light exit of lens 50 to the light entrance, the size of filter 8 can be reduced, improving the mechanical strength of the product while reducing material costs. Furthermore, the back focus of lens 50 can be further reduced, resulting in a lower module height. Filter 8 is changed from a rectangular shape to a circular shape, improving the strength of filter 8. The sealing assembly 4 is further refined into a sealing ring 40 and a protective sheet 41. Sealing ring 40 has a certain depth to form a cover structure on mounting bracket 3, while protective sheet 41 protects filter 8.

[0043] As an optimization solution of the embodiment of the utility model, please refer to Figures 1 to 15 , further comprising a fixing frame 6, the mounting bracket 3 being threadedly connected to the fixing frame 6. In this embodiment, the fixing frame 6 facilitates connection with other parts of the imaging module. The outer surface of the mounting bracket 3 has threads, and the fixing frame 6 has threads inside. The two are threadedly connected, and the fixing frame 6 has screw holes 60.

[0044] As an optimization solution of the embodiment of the utility model, please refer to Figures 1 to 17 The lens assembly 5 further includes a base 51, the lens 50 is mounted on the base 51, and the image sensor 7 is mounted on a side of the base 51 away from the lens 50. In this embodiment, the lens assembly 5 includes the lens 50 and the base 51 on which the lens 50 is mounted. The image sensor 7 includes an image sensor chip 71 and a signal conveyor belt 70 connected to the image sensor chip 71. The image sensor chip 71 is an existing chip, and the working principle of the imaging module is also existing technology, which will not be described in detail here.

[0045] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An imaging module with a pre-filter, comprising a filter, a lens assembly, and an image sensor assembly, characterized in that: It also includes a sealing component, the filter is arranged on the side of the lens component away from the image sensing component, the sealing component cover is arranged on the lens component, and the filter is sealed in the sealing component.

2. The imaging module with a pre-filter according to claim 1, wherein: The lens assembly comprises a lens, and the filter is arranged in front of the lens.

3. The imaging module with a pre-filter according to claim 2, wherein: It also includes a mounting bracket, the lens is arranged on the mounting bracket, and the sealing assembly is fixed on the mounting bracket.

4. The imaging module with a pre-filter according to claim 3, wherein: The sealing assembly includes a sealing ring that is threadedly connected to the mounting bracket.

5. The imaging module with a pre-filter according to claim 4, characterized in that: The sealing assembly further comprises a protective sheet arranged on a side of the sealing ring away from the lens.

6. The imaging module with a pre-filter according to claim 3, wherein: A fixing frame is also included, and the mounting bracket is threadedly connected to the fixing frame.

7. The imaging module with a pre-filter according to claim 6, wherein: The fixing frame is provided with screw holes.

8. The imaging module with a pre-filter according to claim 2, wherein: The lens assembly also includes a base, the lens is arranged on the base, and the image sensing component is arranged on a side of the base away from the lens.

9. The imaging module with a pre-filter according to claim 1, wherein: The image photosensitive component includes an image photosensitive chip and a signal conveying belt connected to the image photosensitive chip.

10. The imaging module with a pre-filter according to claim 1, wherein: It also includes a filter rotation switching device for driving the filter to rotate.

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