Optical filter rotation switching device and image module

Abstract

The utility model relates to the technical field of cameras, and provides an optical filter rotation switching device, which comprises a rotation support and a driving mechanism used for driving the rotation support to rotate, the rotation support is provided with a mounting ring used for mounting an optical filter and a driving frame driven by the driving mechanism to rotate, and the placement ring is connected with the driving frame. The utility model further provides an image module which comprises the optical filter and the optical filter rotation switching device, and the optical filter is arranged on the arrangement ring. According to the utility model, through the cooperation of the rotating support and the driving mechanism, the optical filters can be switched in a rotating mode, compared with a traditional drawer-type switching mode, the size of the module can be greatly reduced, and finally a miniaturized image module is obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of cameras, in particular to a filter rotating and switching device and an imaging module. Background Art

[0002] In the field of Internet of Things, it has been a necessary item to use intelligent imaging modules to collect image vision as a link of signal acquisition. Due to the complexity of the external ambient light for visual acquisition, the imaging acquisition module needs to work 24 hours. To cope with the complex environment, the camera module needs to use a movable filter to adjust the transmitted light to meet the shooting requirements. In the existing design, the filter switch of the filter uses a drawer type switch, and the filter is driven to move horizontally by the drawer type filter switch, so as to achieve the purpose of using different band filters in different light environments. However, the size of this product is relatively large, the material cost is high, it occupies the internal size of the terminal product, and the terminal supporting motherboard module is large and the cost is high. Under the requirement of product miniaturization, the existing design has drawbacks, the module size cannot be reduced, and the requirements of the terminal application scenario cannot be met. At the same time, due to the pressure of economic downturn in the consumer market, the market's sensitivity to cost is higher than that to performance, but the current material cost cannot be further reduced.

[0003] In addition, in the prior art, the filter is usually installed between the lens and the image sensor chip. The object scene light is transmitted through the pupil above the lens to the light outlet of the lens and then successively 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 increases, the filter needs to be increased synchronously, and the risk of damage to the filter is high when it is impacted by external force. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a filter rotating and switching device and an imaging module, which can at least solve some defects in the prior art.

[0005] To achieve the above purpose, the embodiment of the utility model provides the following technical scheme: A filter rotating and switching device includes a rotating bracket and a driving mechanism for driving the rotating bracket to rotate. The rotating bracket has a placement ring for installing the filter and a driving frame driven by the driving mechanism to rotate, and the placement ring is connected to the driving frame.

[0006] Further, a limiting hole is arranged on the placement ring, and the central axis of the limiting hole is arranged parallel to the rotation axis of the placement ring.

[0007] Further, the driving mechanism includes a swing arm and an electromagnetic motor for driving the swing arm to swing, and the swing arm is arranged on the driving frame.

[0008] Furthermore, the driving frame has a U-shaped card slot for the swing arm to be snapped into.

[0009] Furthermore, it further includes a mounting bracket, and both the rotating bracket and the driving mechanism are mounted on the mounting bracket.

[0010] Furthermore, the mounting bracket is a cylindrical structure with an inner cavity, the driving mechanism is disposed in the inner cavity, the placement ring is disposed on one end face of the mounting bracket, and the end face has a hole for the driving frame to extend into the inner cavity.

[0011] Furthermore, an arc-shaped limiting plate is provided on the end face, and when the placement ring rotates, it slides in contact with the inner ring of the limiting plate.

[0012] Furthermore, an opening for the lens assembly to be installed is also provided on the end face.

[0013] Furthermore, the placement ring and the driving frame are in an L-shaped structure.

[0014] Another technical solution provided by the embodiment of the present invention: An imaging module includes a filter, and also includes the above-mentioned filter rotation switching device, and the filter is installed on the placement ring.

[0015] Compared with the prior art, the beneficial effect of the present invention is that through the cooperation of the rotating bracket and the driving mechanism, the filter can be switched in a rotating manner, which can greatly reduce the volume of the module compared with the traditional drawer-type switching method, and finally obtain a miniaturized imaging module. Description of the Drawings

[0016] Figure 1 It is a first perspective view of a filter rotation switching device provided by an embodiment of the present invention (the mounting bracket is not shown);

[0017] Figure 2 It is a second perspective view of a filter rotation switching device provided by an embodiment of the present invention (the mounting bracket is not shown);

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

[0019] Figure 4 It is a first perspective view of an imaging module provided by an embodiment of the present invention (the fixing frame is not shown);

[0020] Figure 5 It is a second perspective view of an imaging module provided by an embodiment of the present invention (the fixing frame is not shown);

[0021] Figure 6 Schematic diagram of a mounting bracket for a filter rotating and switching device provided by an embodiment of the present utility model;

[0022] Figure 7 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 (showing the state when the rotating bracket is not rotated);

[0023] Figure 8 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 (showing the state during the rotation of the rotating bracket);

[0024] Figure 9 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 (showing the state after the rotation of the rotating bracket is completed);

[0025] Figure 10 For Figure 7 , Figure 8 and Figure 9 Schematic diagram for showing the state change by putting the three states together;

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

[0027] Figure 12 Second - perspective schematic diagram of an imaging module provided by an embodiment of the present utility model with the mounting bracket removed;

[0028] Figure 13 First - perspective schematic diagram of a sealing assembly of an imaging module provided by an embodiment of the present utility model;

[0029] Figure 14 Second - perspective schematic diagram of a sealing assembly of an imaging module provided by an embodiment of the present utility model;

[0030] Figure 15 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 Schematic diagram of the cooperation between a filter, a lens assembly, and an image sensor assembly of an imaging module provided by an embodiment of the present utility model;

[0032] Figure 17 Schematic diagram of an image sensor assembly of an imaging module provided by an embodiment of the present utility model;

[0033] In the attached drawing reference numerals: 1 - rotating bracket; 10 - mounting ring; 100 - limiting hole; 11 - driving frame; 110 - U-shaped card slot; 2 - driving mechanism; 20 - swing arm; 21 - electromagnetic motor; 3 - mounting bracket; 30 - limiting post; 31 - inner cavity; 32 - hole; 33 - limiting plate; 34 - opening; 4 - sealing assembly; 40 - sealing ring; 41 - protection piece; 5 - lens assembly; 50 - lens; 51 - base; 6 - fixed frame; 60 - screw hole; 7 - image sensing assembly; 70 - signal conveyor belt; 71 - image sensing chip; 8 - filter. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figures 1 to 15 , an embodiment of the present invention provides a filter rotation switching device, including 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 the filter 8 and a driving frame 11 driven by the driving mechanism 2 to rotate, and the mounting ring 10 is connected to the driving frame 11. In this embodiment, through the cooperation of the rotating bracket 1 and the driving mechanism 2, the filter 8 can be switched in a rotating manner, which can greatly reduce the volume of the module compared with the traditional drawer-type switching method, and finally obtain a miniaturized imaging module. Specifically, the mounting ring 10 has an area for mounting the filter 8, and the filter 8 can be 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, in this embodiment, the filter 8 shown is circular, so the area for mounting the filter 8 on the mounting ring can be designed as a circular ring, and their sizes can also be matched according to needs. After 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 then drives the mounting ring 10 to rotate. The rotation method is as Figures 7 to 10As shown, it can be seen that the rotating bracket 1 gradually rotates in front of the lens 50 of the lens assembly 5. When filtering is required, the filter 8 is rotated in 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 overlap between the filters 8. The driving mechanism 2 may not need to be changed, but the driving frame 11 can be designed in the form of a connecting rod frame as required. In this way, one driving mechanism 2 can drive multiple rotating brackets 1 to rotate.

[0036] As an optimized solution of the embodiment of the present utility model, please refer to Figures 1 to 15 , a limiting hole 100 is provided on the placement ring 10, and the central axis of the limiting hole 100 is arranged parallel to the rotation axis of the placement ring 10. In this embodiment, by designing this limiting hole 100, the rotation path of the rotating bracket 1 can be defined. A limiting post 30 corresponding to the limiting hole 100 can be designed on the mounting bracket 3, and the limiting post 30 is rotatably arranged in the limiting hole 100. In this way, when the driving mechanism 2 drives the placement ring 10 to rotate, the placement ring 10 can rotate around the limiting post 30.

[0037] As an optimized solution of the embodiment of the present utility model, please refer to Figures 1 to 15 , the driving mechanism 2 includes a swing arm 20 and an electromagnetic motor 21 that drives the swing arm 20 to swing, and the swing arm 20 is arranged on the driving frame 11. In this embodiment, the driving 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. When the swing arm 20 swings, it can drive the rotating bracket 1 to rotate. The driving method here is the same as that of the existing gear rotation, where the gear is rotated tooth by tooth by a lever. The driving method here is prior art, and there are many ways to realize the rotation of the rotating bracket 1 in the prior art, which will not be elaborated here.

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

[0039] As an optimized solution of the embodiment of the present utility model, please refer to Figures 1 to 15, the device further includes a mounting bracket 3, and both the rotating bracket 1 and the driving mechanism 2 are mounted on the mounting bracket 3. In this embodiment, the mounting bracket 3 is provided for mounting the rotating bracket 1 and the driving mechanism 2. Preferably, the mounting bracket 3 is a cylindrical structure with an inner cavity 31, the driving mechanism 2 is disposed in the inner cavity 31, the placement ring 10 is disposed on one end face of the mounting bracket 3, and the end face has a hole 32 for the driving frame 11 to extend into the inner cavity 31. An arc-shaped limiting plate 33 is provided on the end face, and the placement ring 10 slides in contact with the inner ring of the limiting plate 33 when rotating. An opening 34 for installing the lens assembly 5 is also provided on the end face. The mounting bracket 3 is cylindrical, one end is a large opening 34, which facilitates the driving mechanism 2 to enter the inner cavity 31 from here, and one end has a solid surface, but holes 32 and an opening 34 are also provided on this end face. The hole 32 is for the driving frame 11 to extend into the inner cavity 31 to connect with the driving mechanism 2, and the opening 34 is for exposing the lens 50. A limiting plate 33 is also provided on the end face, which can play a role in limiting and guiding.

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

[0041] Please refer to Figures 1 to 15 , the embodiment of the present utility model provides an imaging module, including a filter 8 and the above-mentioned filter rotating and switching device, and the filter 8 is installed on the placement ring 10. In this embodiment, using the above-mentioned filter rotating and switching device in the imaging module can provide a way to rotate and switch the filter 8 for the imaging module, and can reduce the volume of the imaging module.

[0042] As an optimized solution of the embodiment of the present utility model, please refer to Figures 1 to 15, further comprising a sealing assembly 4, a lens assembly 5, and an image sensor assembly 7 for sealing an external filter 8. The filter 8 is disposed on a side of the lens assembly 5 away from the image sensor assembly 7. The sealing assembly 4 covers the lens assembly 5, and the filter 8 is sealed within the sealing assembly 4. In this embodiment, the sealing assembly 4 can protect the external filter 8. Preferably, the lens assembly 5 includes a lens 50, the filter 8 is disposed in front of the lens 50, the lens 50 is disposed on the mounting bracket 3, and the sealing assembly 4 is fixed to the mounting bracket. The sealing assembly 4 includes a sealing ring 40, and the sealing ring 40 is threadedly connected to the mounting bracket 3. The sealing assembly 4 further includes a protective sheet 41 disposed on a side of the sealing ring 40 away from the lens 50. By disposing the filter 8 externally, the installation position of the filter 8 is changed from the light exit port of the lens 50 to the light entrance port, the size of the filter 8 can be reduced, which can not only improve the mechanical feasibility strength of the product but also reduce the material usage cost. Moreover, the back focal length of the lens 50 can be further decreased, the height of the module is lower, the filter 8 is changed from a rectangle to a circle, and the strength of the filter 8 body is improved. The sealing assembly 4 is refined into a sealing ring 40 and a protective sheet 41. The sealing ring 40 has a certain depth to form a structure that can cover the mounting bracket 3, and the protective sheet 41 can protect the filter 8.

[0043] As an optimized solution of the embodiment of the present invention, please refer to Figures 1 to 15 , further comprising a fixing frame 6, and the mounting bracket 3 is 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, and the two are threadedly connected. The fixing frame 6 has screw holes 60.

[0044] As an optimized solution of the embodiment of the present invention, please refer to Figures 1 to 17 , the lens assembly 5 further includes a base 51, the lens 50 is disposed on the base 51, and the image sensor assembly 7 is disposed on a side of the base 51 away from the lens 50. In this embodiment, the lens assembly 5 includes a lens 50 and a base 51 for mounting the lens 50. The image sensor assembly 7 includes an image sensor chip 71 and a signal conveyor belt 70 connected to the image sensor chip 71. Here, the image sensor chip 71 is an existing chip, and the working principle of the imaging module is also prior art, so it will not be elaborated here.

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

Claims

1. A filter rotation switching device, characterized in that: The invention comprises a rotating support and a driving mechanism for driving the rotating support to rotate. The rotating support has a placement ring for installing a filter and a driving frame driven to rotate by the driving mechanism. The placement ring is connected to the driving frame.

2. The filter rotation switching device according to claim 1, characterized in that: The placement ring is provided with a limiting hole, and the center axis of the limiting hole is arranged parallel to the rotation axis of the placement ring.

3. The filter rotation switching device according to claim 1, characterized in that: The driving mechanism comprises a swing arm and an electromagnetic motor for driving the swing arm to swing, and the swing arm is arranged on the driving frame.

4. The filter rotation switching device according to claim 3, characterized in that: The driving frame has a U-shaped slot for the swing arm to be inserted into.

5. The filter rotation switching device according to claim 1, characterized in that: It also includes a mounting bracket, on which the rotating bracket and the driving mechanism are both mounted.

6. The filter rotation switching device according to claim 5, characterized in that: The mounting bracket is a cylindrical structure with an inner cavity, the driving mechanism is arranged in the inner cavity, the placement ring is arranged on one end surface of the mounting bracket, and the end surface has a hole for the driving frame to extend into the inner cavity.

7. The filter rotation switching device according to claim 6, characterized in that: An arc-shaped limiting plate is arranged on the end surface, and the placing ring slides and contacts the inner ring of the limiting plate when the placing ring rotates.

8. The filter rotation switching device according to claim 6, characterized in that: The end surface is also provided with an opening for installing the lens assembly.

9. The filter rotation switching device according to claim 1, characterized in that: The placement ring and the driving frame are in an L-shaped structure.

10. An imaging module, comprising a filter, characterized in that: It also includes the filter rotation switching device as described in any one of claims 1 to 9, and the filter is installed on the installation ring.

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