High-magnification camera module with built-in ultra-thin prism

Abstract

The utility model relates to the field of camera modules, and discloses a high magnification camera module with a built-in ultra-thin prism, which comprises a support, an anti-shake module, a lens module and a prism, the anti-shake module, the lens module and the prism are fixed on the prism, the prism is trapezoidal and comprises at least two reflecting surfaces, and the anti-shake module and the lens module are positioned on the same side of the prism and are respectively opposite to one reflecting surface. Light entering the lens module enters the anti-shake module through at least two times of reflection through the prism. According to the telephoto lens provided by the utility model, a photosensitive chip with a larger size can be placed and a longer distance can be shot at the same time.

Description

Technical Field

[0001] The utility model relates to the field of camera modules, in particular to a high-magnification camera module with an ultra-thin prism built in. Background Art

[0002] Miniature autofocus camera devices are widely used in mobile phones. Currently, mainstream mobile phones use three cameras, namely wide-angle, telephoto, and ultra-wide-angle cameras. Today's mobile phones tend to be made thinner and lighter, but the telephoto lens needs to adjust the distance between the sensor and the lens as the zoom ratio increases, which often leads to an increase in the size of the telephoto lens. The camera module in the current mobile phone is limited by the size of the mobile phone. Conventional telephoto cameras paired with the main camera can generally achieve 5x optical zoom. Due to the thickness of the mobile phone body, the zoom ratio of the telephoto is often small and most of them are small-sized photosensitive chips, with low image resolution. Therefore, it is necessary to provide a telephoto lens that can accommodate a larger photosensitive chip and shoot at a longer distance. Utility Model Content

[0003] The utility model aims to provide a high-magnification camera module with an ultra-thin prism built in, so as to provide a telephoto lens capable of accommodating a larger-sized photosensitive chip and simultaneously shooting at a longer distance.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a high-magnification camera module with an ultra-thin prism built in, including a bracket and an anti-shake module, a lens module and a prism fixed on the bracket. The prism is trapezoidal and includes at least two reflective surfaces. The anti-shake module and the lens module are located on the same side of the prism and are respectively opposite to a reflective surface. The light entering the lens module passes through the prism and is reflected at least twice before entering the anti-shake module.

[0005] The beneficial effects of this program are:

[0006] Through the above setting, the light path enters the lens module and is received by the anti-shake module and imaged after multiple reflections in the prism. By setting the prism, the light path is reflected in the prism in the camera module to extend the length of the light path. Compared with traditional telephoto lenses, this design provides greater zoom capability in a limited space. Multiple reflections are achieved through the built-in prism to achieve higher-magnification optical zoom, thereby obtaining a good telephoto effect.

[0007] The anti-shake module and the lens module are located on the same side of the prism and are separated, which effectively shortens the length of the entire camera module. The traditional anti-shake module and the lens module are directly connected, resulting in a longer telephoto lens, which cannot adapt to the thin and light mobile phone body. At the same time, the anti-shake module is not directly connected to the lens module, so a larger photosensitive chip can be used without significantly affecting the height of the lens module, and can be suitable for relatively thin mobile phone bodies.

[0008] Preferably, as an improvement, it further includes a convex mirror and a concave mirror fixed on the prism, the convex mirror is opposite to the lens module with the convex surface facing the lens module, and the concave mirror is opposite to the anti-shake module with the concave surface facing the anti-shake module.

[0009] The beneficial effects are: setting up convex mirrors and concave mirrors can effectively focus light, increase the amount of light entering the lens module and anti-shake module, and further reduce the module height and shorten the focusing distance while maintaining the length of the optical path.

[0010] Preferably, as an improvement, the prism is trapezoidal and has three reflecting surfaces, the two inclined surfaces are the first reflecting surface and the third reflecting surface, the long side of the prism is the second reflecting surface, and the light enters the anti-shake module after being reflected by the first reflecting surface, the second reflecting surface and the third reflecting surface in turn.

[0011] The beneficial effect is: after the light enters the prism through the first reflective surface, it passes through the second reflective surface (long side) and the third reflective surface in sequence, and then enters the anti-shake module. The light path is significantly extended in the prism, effectively increasing the optical zoom ratio, allowing the camera to achieve a higher optical zoom in a shorter camera module.

[0012] Preferably, as an improvement, the anti-shake module includes a shell, an anti-shake part and a circuit board part arranged in sequence, the anti-shake part includes a coil group, a magnet part and a ball group, the coil part includes a plurality of coils electrically connected to the circuit board part, the magnet part is fixed on the shell, the magnet part includes magnets with the same number as the coils, and the magnets are opposite to the coils one by one.

[0013] The beneficial effect is that when the camera module is working, current is connected to the coil. As the magnitude and direction of the current change, the coil part can slide back and forth relative to the magnet part to achieve anti-shake, ensuring the clarity and accuracy of the image.

[0014] Preferably, as an improvement, the circuit board portion includes a hard circuit board, an elastic circuit board, a bottom steel sheet and a flexible circuit board, the elastic circuit board includes an inner ring, an elastic wire and an outer ring, the inner ring and the outer ring are connected by multiple elastic wires, a photosensitive chip is fixed on the hard circuit board, the outer ring is connected to the bottom steel sheet, the inner ring is connected to the hard circuit board, the two ends of the flexible circuit board are electrically connected to the hard circuit board and the lens module respectively, and the coil portion is fixed on the hard circuit board.

[0015] The beneficial effect is: through the above setting, when the coil is energized, the hard circuit board and the photosensitive chip are driven to slide under the action of electromagnetic force, thereby compensating for image jitter caused by hand shaking or other movements; at the same time, the elastic circuit board plays the role of balancing the torque, making the anti-shake action smoother and more precise, effectively improving the stability and clarity of the image.

[0016] Preferably, as an improvement, a filter portion is further provided between the anti-shake portion and the circuit board portion, the filter portion comprising an infrared filter and a filter holder, the infrared filter is fixed on the filter holder, and the filter holder is fixed on the hard circuit board.

[0017] The beneficial effects are: the infrared filter can effectively filter out unnecessary infrared light, preventing infrared light from interfering with the photosensitive chip and causing color distortion or image blur. By reducing the impact of infrared light, the imaging effect is closer to the real natural color, thereby improving the imaging quality.

[0018] Preferably, as an improvement, it further includes a magnetic sheet fixed on the rigid circuit board, and the ball group is located between the shell and the rigid circuit board, and the ball group includes a plurality of balls.

[0019] The beneficial effects are as follows: by providing a magnetic attraction sheet, it is possible to provide suction force that keeps the hard circuit board always close to the magnet group; at the same time, multiple balls are provided between the shell and the hard circuit board to cooperate with the magnetic attraction sheet, so that the distance between the hard circuit boards is constant; through the support of multiple balls, the hard circuit board always remains on the same horizontal plane during the sliding process; the friction force of the balls is small and does not restrict the sliding of the hard circuit board, and also prevents the hard circuit board from tilting or irregular movement, further ensuring the smoothness of the anti-shake action.

[0020] Preferably, as an improvement, the lens module includes a lens portion and a voice coil motor, and the lens portion is fixed on the voice coil motor.

[0021] The beneficial effect is that the lens part in the lens module is fixed on the voice coil motor. By controlling the current direction and intensity of the voice coil motor, the position of the lens part can be accurately adjusted, and the focal length can be quickly adjusted to achieve high-precision autofocus. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 An exploded view of an embodiment of the present utility model;

[0023] Figure 2 This is an overall diagram of an embodiment of the present utility model;

[0024] Figure 3 A top view of the flexible circuit board according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the prism light path reflection in an embodiment of the present utility model. DETAILED DESCRIPTION

[0026] The following is further described in detail through specific implementation methods:

[0027] The figure marks in the drawings of the specification include: bracket 1, prism 2, convex mirror 3, concave mirror 4, coil group 5, magnet part 6, ball group 7, hard circuit board 8, elastic circuit board 9, flexible circuit board 10, bottom steel sheet 11, photosensitive chip 12, infrared filter 13, filter bracket 14, magnetic sheet 15, shell 16, voice coil motor 17, lens part 18, inner ring 19, outer ring 20, elastic wire 21, connecting plate 22, first reflecting surface 23, second reflecting surface 24, and third reflecting surface 25.

[0028] Example

[0029] The embodiment is basically as follows Figures 1-4 As shown, Figure 1 and Figure 2 The high-magnification camera module with an ultra-thin prism is shown, comprising a bracket 1 and an anti-shake module, a lens module and a prism 2 fixed to the bracket 1. The prism 2 is trapezoidal and includes at least two reflective surfaces. In this embodiment, the prism 2 is trapezoidal and has three reflective surfaces. The anti-shake module and the lens module are located on the same side of the prism, i.e., the long side of the prism 2. Figure 4 As shown, the two inclined surfaces are the first reflecting surface 23 and the third reflecting surface 25, the long side of the prism 2 is the second reflecting surface 24, the lens module is opposite to the first reflecting surface 23, and the anti-shake module is opposite to the third reflecting surface 25. The light is reflected by the first reflecting surface 23, the second reflecting surface 24 and the third reflecting surface 25 in sequence and enters the anti-shake module. It also includes a connecting plate 22, and the shell 16 and the voice coil motor 17 are connected to the bracket 1 through the connecting plate 22. After the light enters the prism 2 through the first reflecting surface 23, it is reflected by the second reflecting surface 24 and the third reflecting surface 25 in sequence and then enters the anti-shake module. The light path is significantly extended in the prism 2, which effectively increases the optical zoom ratio, so that the camera can achieve a higher optical zoom in a shorter camera module. In this embodiment, Figure 1 As shown, it also includes a convex mirror 3 and a concave mirror 4 fixed on the bracket 1. The convex mirror 3 is opposite to the lens module with the convex surface facing the lens module, and the concave mirror 4 is opposite to the anti-shake module with the concave surface facing the anti-shake module. It can effectively focus light and increase the amount of light entering the lens module and the anti-shake module. While maintaining the length of the optical path, it further reduces the module height and shortens the focusing distance.

[0030] In this embodiment, the lens module includes a lens part 18 and a voice coil motor 17. The lens part 18 in the lens module is fixed on the voice coil motor 17. By controlling the direction and intensity of the current connected to the voice coil motor 17, the position of the lens part 18 can be precisely adjusted, and the focal length can be quickly adjusted to achieve high-precision automatic focus. The anti-shake module in this embodiment includes a shell 16, an anti-shake part and a circuit board part arranged in sequence. The anti-shake part includes a coil group 5, a magnet part 6 and a ball group 7. The coil part includes a plurality of coils electrically connected to the circuit board part. In this embodiment, the number of coils is 4. The magnet part 6 is fixed on the shell 16. The magnet part 6 includes the same number of magnets as the coils, and the magnets are opposite to the coils one by one. Current is connected to the coil. As the magnitude and direction of the current change, the coil part can slide back and forth relative to the magnet part 6 to perform anti-shake, thereby ensuring image clarity. The device also includes a magnetic sheet 15 fixed to the rigid circuit board 8. A ball assembly 7 is located between the housing 16 and the rigid circuit board 8. The ball assembly 7 includes a plurality of balls, with four balls in this embodiment. The magnetic sheet 15 provides suction that keeps the rigid circuit board 8 close to the magnet assembly. The multiple balls positioned between the housing 16 and the rigid circuit board 8, in conjunction with the magnetic sheet 15, maintain a constant distance between the rigid circuit boards 8. The support of the multiple balls ensures that the rigid circuit board 8 remains on the same horizontal plane during sliding. The low friction of the balls does not restrict the sliding of the rigid circuit board 8, preventing the rigid circuit board 8 from tilting or moving erratically, further ensuring the smoothness of the anti-shake operation.

[0031] In this embodiment, the circuit board portion includes a rigid circuit board 8, an elastic circuit board 9, a bottom steel sheet 11, and a flexible circuit board 10. As shown in FIG3, the elastic circuit board 9 includes an inner ring 19, elastic wires 21, and an outer ring 20. The inner ring 19 and the outer ring 20 are connected by multiple elastic wires 21. A photosensitive chip 12 is fixed on the rigid circuit board 8. The outer ring 20 is connected to the bottom steel sheet 11, and the inner ring 19 is connected to the rigid circuit board 8. The two ends of the flexible circuit board 10 are respectively electrically connected to the rigid circuit board 8 and the lens module to transmit electrical signals. The coil portion is fixed to the rigid circuit board. Through the above arrangement, when the coil is energized, it drives the rigid circuit board 8 and the photosensitive chip 12 to slide under the action of electromagnetic force, thereby compensating for image jitter caused by hand shake or other movements; at the same time, the elastic circuit board 9 plays the role of balancing torque, making the anti-shake action more stable and accurate, effectively improving the stability and clarity of the image. A filter portion is further provided between the anti-shake portion and the circuit board portion. The filter portion includes an infrared filter 13 and a filter holder 14 . The infrared filter 13 is fixed on the filter holder 14 , and the filter holder 14 is fixed on the rigid circuit board 8 .

[0032] The infrared filter 13 can effectively filter out unnecessary infrared light, preventing infrared light from interfering with the photosensitive chip 12 and causing color distortion or image blur. By reducing the influence of infrared light, the imaging effect is closer to the real natural color, thereby improving the imaging quality.

[0033] The specific implementation process is as follows:

[0034] Through the above-mentioned setting, the light path enters the lens module and is received by the anti-shake module and imaged after multiple reflections in the prism 2. By setting the prism 2, the light path is reflected in the prism 2 in the camera module to extend the length of the light path. Compared with the traditional telephoto lens, this design provides greater zoom capability in a limited space. The built-in multiple reflections of the prism 2 are used to achieve a higher-magnification optical zoom to obtain a good telephoto effect. Even if a larger-area photosensitive chip 12 is replaced, the length of the module will not be significantly increased.

[0035] The anti-shake module and the lens module are located on the same side of the prism 2 and are separated, which effectively shortens the length of the entire camera module. The traditional anti-shake module and the lens module are directly connected, resulting in a longer telephoto lens and being unable to adapt to a thin and light mobile phone body. At the same time, the anti-shake module is not directly connected to the lens module, so a larger photosensitive chip 12 can be used without having a significant impact on the height of the lens module, and can be suitable for a relatively thin and light mobile phone body.

[0036] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A high-magnification camera module with an ultra-thin prism, characterized by: The system includes a bracket and an anti-shake module, a lens module and a prism fixed on the bracket. The prism is trapezoidal and includes at least two reflective surfaces. The anti-shake module and the lens module are located on the same side of the prism and are respectively opposite to a reflective surface. The light entering the lens module passes through the prism and is reflected at least twice before entering the anti-shake module. The system also includes a convex mirror and a concave mirror fixed on the prism. The convex mirror is opposite to the lens module with the convex surface facing the lens module, and the concave mirror is opposite to the anti-shake module with the concave surface facing the anti-shake module.

2. The high-magnification camera module with an ultra-thin prism as claimed in claim 1, characterized in that: The prism is trapezoidal and has three reflective surfaces. The two inclined surfaces are the first reflective surface and the third reflective surface. The long side of the prism is the second reflective surface. The light is reflected by the first reflective surface, the second reflective surface and the third reflective surface in sequence and enters the anti-shake module.

3. The high-magnification camera module with an ultra-thin prism as claimed in claim 2, characterized in that: The anti-shake module includes a shell, an anti-shake part and a circuit board part arranged in sequence. The anti-shake part includes a coil group, a magnet part and a ball group. The coil part includes multiple coils electrically connected to the circuit board part. The magnet part is fixed on the shell. The magnet part includes the same number of magnets as the coils, and the magnets are opposite to the coils one by one.

4. The high-magnification camera module with an ultra-thin prism as claimed in claim 3, characterized in that: The circuit board part includes a hard circuit board, an elastic circuit board, a bottom steel sheet and a flexible circuit board. The elastic circuit board includes an inner ring, an elastic wire and an outer ring. The inner ring and the outer ring are connected by multiple elastic wires. A photosensitive chip is fixed on the hard circuit board. The outer ring is connected to the bottom steel sheet, and the inner ring is connected to the hard circuit board. The two ends of the flexible circuit board are electrically connected to the hard circuit board and the lens module respectively, and the coil part is fixed on the hard circuit board.

5. The high-magnification camera module with an ultra-thin prism as claimed in claim 4, characterized in that: A filter portion is also provided between the anti-shake portion and the circuit board portion. The filter portion includes an infrared filter and a filter bracket. The infrared filter is fixed on the filter bracket, and the filter bracket is fixed on the rigid circuit board.

6. The high-magnification camera module with an ultra-thin prism as claimed in claim 5, characterized in that: It also includes a magnetic sheet fixed on the rigid circuit board. The ball group is located between the shell and the rigid circuit board, and the ball group includes a plurality of balls.

7. The high-magnification camera module with an ultra-thin prism as claimed in claim 6, characterized in that: The lens module includes a lens unit and a voice coil motor, and the lens unit is fixed on the voice coil motor.

Images