Long-focus camera module with rear prism

Abstract

The utility model relates to the field of camera modules, and discloses a long-focus camera module with a rear prism, which comprises a focusing motor, a prism part and a sensor part, the prism part comprises a prism and a prism table, the bottom surface of the focusing motor is fixedly connected with the prism table, a prism groove is arranged in the prism table, one side of the prism is an inclined surface, the sensor part is arranged on one side of the prism table, and the sensor part is arranged on the other side of the prism table. Light enters from the focusing motor direction and is refracted by the prism to enter the sensor part. The long-focus camera module provided by the utility model is relatively low in cost.

Description

Technical Field

[0001] This utility model relates to the field of camera modules, specifically to a telephoto camera module with a prism rear-mounted sensor. Background Technology

[0002] With the increasing demand for thinner and lighter designs and high-performance cameras in smartphones and other mobile devices, periscope camera technology has attracted much attention because it can achieve telephoto shooting in a limited space. Traditional periscope cameras usually use a prism front structure, where light is first reflected by the prism before entering the lens group and finally imaged by the photosensitive chip. However, the above-mentioned camera module often has a complex support structure to ensure the stability of the optical path, resulting in high assembly costs. At the same time, the window on the back of the phone needs to be adapted to the size of the prism, which requires high assembly precision. Therefore, there is a need to provide a telephoto camera module with lower cost. Utility Model Content

[0003] The present invention aims to provide a telephoto camera module with a prism rear-mounted configuration, thereby providing a telephoto camera module with lower cost.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a telephoto camera module with a prism rear-mounted, comprising a focusing motor, a prism section, and a sensor section. The prism section includes a prism and a prism base. The bottom surface of the focusing motor is fixedly connected to the prism base. A prism groove is opened inside the prism base. One side of the prism is an inclined surface. The sensor section is located on one side of the prism base. Light enters from the direction of the focusing motor, is refracted by the prism, and then enters the sensor section.

[0005] The beneficial effects of this plan are:

[0006] This technical solution adopts a rear-mounted prism design, which simplifies the complex support structure required by traditional front-mounted prisms, reduces the requirements for the window size on the back panel of the phone, and reduces the dependence on high-precision assembly. This results in a lower-cost and simpler module manufacturing solution. At the same time, the focusing motor is fixedly connected to the prism mount, and a dedicated prism slot is opened in the prism mount to ensure that the relative position between the prism and the focusing motor is precisely fixed. This ensures that the light can accurately enter the sensor after being refracted by the prism, thereby improving the overall imaging accuracy and optical stability.

[0007] By setting prisms to fold the optical path in the camera module, a longer optical path can be achieved within a limited device thickness, thereby achieving telephoto shooting effects and meeting the needs of high-magnification zoom. The focal length is extended by refraction and reflection of the light path, and there is no need to install an excessively tall lens group inside the body. Therefore, it is very suitable for ultra-thin mobile phones and other mobile devices.

[0008] Preferably, as an improvement, it also includes an infrared filter and a filter holder, the filter holder having a groove, the infrared filter being fixedly embedded in the groove, and the two sides of the filter holder being fixedly connected to the prism base and the sensor unit, respectively.

[0009] The beneficial effects are as follows: Infrared light can interfere with image imaging, causing color distortion or blurring. By setting an infrared filter, infrared light before it enters the sensor can be effectively filtered out, reducing infrared interference and thus improving the color reproduction and image quality. Simultaneously, the filter holder has a groove to securely embed the infrared filter, preventing displacement due to vibration or temperature changes and ensuring optical path stability. Furthermore, the filter holder is fixedly connected to the prism mount and the sensor on both sides, ensuring the relative positional accuracy between the optical components, helping to maintain overall optical path consistency and optimize imaging effects.

[0010] Preferably, as an improvement, it also includes a lens module mounted on the focusing motor.

[0011] Preferably, as an improvement, the sensor section includes a photosensitive chip fixed on a rigid circuit board, with an infrared filter opposite to the photosensitive chip.

[0012] The beneficial effects are as follows: the infrared filter and the photosensitive chip are arranged opposite each other, which can filter out unwanted infrared light before the light enters the photosensitive chip, ensuring that the sensor mainly receives visible light, improving color reproduction and image detail performance. The photosensitive chip is directly fixed on the rigid circuit board for circuit connection. With the reasonable positioning of the infrared filter, the overall structure is more compact and easy to automate.

[0013] Preferably, as an improvement, the prism has a 45-degree bevel.

[0014] The beneficial effects are: it facilitates the folding of the optical path, thereby extending the optical path within a limited space, enabling the camera module to balance telephoto shooting capabilities and a slim design.

[0015] Preferably, as an improvement, it also includes a flexible circuit section, which includes a first flexible circuit board and a second flexible circuit board. One end of the first flexible circuit board is electrically connected to a rigid circuit board, and both ends of the second flexible circuit board are electrically connected to the focusing motor and the rigid circuit board, respectively.

[0016] The beneficial effects are as follows: by setting up a second flexible circuit board for electrical connection, the focusing motor can be adjusted to focus by coordinating the imaging of the photosensitive chip, and the first flexible circuit board facilitates the transmission of the image from the photosensitive chip to mobile phones or other electronic devices.

[0017] Preferably, as an improvement, a limiting block for limiting the prism is provided in the prism groove.

[0018] The beneficial effects are: the limiting block ensures that the prism always maintains the correct position in the prism slot, effectively preventing prism displacement due to vibration or temperature changes, thereby maintaining the stability of the optical path. Attached Figure Description

[0019] Figure 1 This is an exploded view of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the filter holder according to an embodiment of the present invention. Detailed Implementation

[0021] The following detailed description illustrates the specific implementation method:

[0022] The reference numerals in the accompanying drawings include: 1. Focusing motor; 2. Prism; 3. Prism mount; 4. Prism slot; 5. Infrared filter; 6. Filter holder; 7. Slot; 8. Lens module; 9. Rigid circuit board; 10. Photosensitive chip; 11. Limiting block; 12. First flexible circuit board; 13. Second flexible circuit board.

[0023] Example

[0024] The implementation examples are basically as follows Figures 1-2 As shown, Figure 1 and Figure 2The diagram illustrates a telephoto camera module with a rear-mounted prism 2, comprising a focusing motor 1, a prism section, and a sensor section. The prism section includes a prism 2 and a prism mount 3. The bottom surface of the focusing motor 1 is fixedly connected to the prism mount 3. A prism groove 4 is formed inside the prism mount 3. One side of the prism 2 is inclined at a 45-degree angle, facilitating the folding of the optical path and extending the optical path within a limited space. This allows the camera module to balance telephoto shooting capabilities with a slim design. The sensor section is located on one side of the prism mount 3. Light enters from the direction of the focusing motor 1, is refracted by the prism 2, and then enters the sensor section. The module also includes an infrared filter 5 and a filter holder 6. A groove 7 is formed on the filter holder 6, and the infrared filter 5 is fixedly embedded in the groove 7. Infrared light can interfere with image imaging, causing color distortion or blurring. By setting the infrared filter 5, infrared light before entering the sensor section can be effectively filtered out, reducing infrared light interference and improving image color reproduction and image quality. Meanwhile, the filter holder 6 is provided with a groove 7, which allows the infrared filter 5 to be firmly embedded, preventing displacement due to vibration or temperature changes, ensuring optical path stability, and optimizing imaging effect. The prism slot 4 is provided with two limiting blocks 11 for the limiting prism 2. The limiting blocks 11 ensure that the prism 2 always maintains the correct position within the prism slot 4, effectively preventing displacement of the prism 2 due to vibration or temperature changes, thereby maintaining optical path stability. In this embodiment, the filter holder 6 is fixedly connected to the prism base 3 and the sensor unit on both sides, respectively. This technical solution employs a rear-mounted prism 2 design, which simplifies the complex support structure required by traditional front-mounted prisms 2. It also reduces the size requirements for the phone's back panel opening and decreases reliance on high-precision assembly, resulting in a lower-cost and simpler module manufacturing solution. Simultaneously, the focusing motor 1 is fixedly connected to the prism mount 3, and a dedicated prism slot 4 is provided within the prism mount 3 to ensure precise positioning between the prism 2 and the focusing motor 1. This ensures that light, after refraction by the prism 2, accurately enters the sensor, improving overall imaging accuracy and optical stability. By folding the optical path within the camera module using the prism 2, a longer optical path can be achieved within a limited device thickness, enabling telephoto shooting and meeting high-magnification zoom requirements. Extending the focal length through refraction and reflection of the light path eliminates the need for an excessively tall lens assembly within the body, making it ideal for ultra-thin smartphones and other mobile devices.

[0025] It also includes a lens module 8, which is mounted on the focusing motor 1 to guide light and increase the amount of light entering the camera module. The sensor section includes a rigid circuit board 9 with a photosensitive chip 10 fixed on it. An infrared filter 5 is opposite to the photosensitive chip 10. The reasonable positioning of the infrared filter 5 makes the overall structure more compact and facilitates automated assembly. It also includes a flexible circuit section, which includes a first flexible circuit board 12 and a second flexible circuit board 13. One end of the first flexible circuit board 12 is electrically connected to the rigid circuit board 9, and both ends of the second flexible circuit board 13 are electrically connected to the focusing motor 1 and the rigid circuit board 9, respectively. By setting the second flexible circuit board 13 for electrical connection, the focusing motor 1 can be adjusted to focus by coordinating the imaging of the photosensitive chip 10. The first flexible circuit board 12 facilitates the transmission of the image of the photosensitive chip 10 to a mobile phone or other electronic device.

[0026] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1.A long-focus camera module with a prism rear-mounted, characterized in that: The focusing motor, the prism part and the sensor part are included, the prism part includes a prism and a prism seat, the bottom surface of the focusing motor is fixedly connected with the prism seat, the prism seat is internally provided with a prism groove, one side of the prism is a bevel, the sensor part is arranged on one side of the prism seat, and light enters the sensor part through the prism from the direction of the focusing motor. 2.The long-focus camera module with a prism rear-mounted according to claim 1, wherein: The infrared filter and a filter support are further included, the filter support is provided with an embedding groove, the infrared filter is fixedly embedded in the embedding groove, and the filter support is fixedly connected with the prism seat and the sensor part on two sides. 3.The long-focus camera module with a prism rear-mounted according to claim 2, wherein: The lens module is further included and is installed on the focusing motor. 4.The long-focus camera module with a prism rear-mounted according to claim 3, wherein: The sensor part includes a hard circuit board and a photosensitive chip fixed on the hard circuit board, and the infrared filter is opposite to the photosensitive chip. 5.The long-focus camera module with a prism rear-mounted according to claim 4, wherein: The bevel of the prism is a 45-degree bevel. 6.The long-focus camera module with a prism rear-mounted according to claim 5, wherein: The flexible circuit part is further included, the flexible circuit part includes a first flexible circuit board and a second flexible circuit board, one end of the first flexible circuit board is electrically connected with the hard circuit board, and two ends of the second flexible circuit board are electrically connected with the focusing motor and the hard circuit board respectively. 7.The long-focus camera module with a prism rear-mounted according to claim 6, wherein: The limiting block for limiting the prism is arranged in the prism groove.

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