Prism Anti-shake mechanism and camera module

Abstract

Provided in the present invention are a prism anti-shake mechanism and a camera module. The prism anti-shake mechanism comprises a base having an accommodating space, a prism holder rotatably arranged in the base, a prism group fixed to the prism holder, a support fixed to the side of the base away from the prism holder, and a drive member used for driving the prism holder to rotate. The support comprises a support body fixed to the base, an arc-shaped portion, and a first arc-shaped track which is formed by recession of the side of the arc-shaped portion close to the prism holder and extends in a first direction. The prism holder comprises a holder body, a mounting recess, a mounting portion, and two second arc-shaped tracks which are parallel to each other and extend in a second direction. The first direction is perpendicular to the second direction. The prism anti-shake mechanism further comprises balls, a magnetic-attraction magnet and a magnetic pole piece. The drive member drives the prism holder to move along the first arc-shaped track and / or the second arc-shaped tracks. Compared with the related art, the prism anti-shake mechanism of the present invention has a good anti-shake effect.

Description

Prism image stabilization mechanism and camera module Technical Field

[0001] This invention relates to the field of camera technology, and in particular to a prism stabilization mechanism and camera module. Background Technology

[0002] Optical image stabilization (OIS) for mobile phone cameras is a platform stabilization technology designed to reduce the impact of hand shake or environmental factors on image stability during photography, often leading to blurry or distorted images. OIS plays a crucial role in this process. It uses purely optical methods to correct and compensate for camera shake. In contrast, mechanical stabilization devices offer higher reliability and produce clearer, more natural images. Technical issues

[0003] The prism-based image stabilization mechanism in the related technology includes a base, an image stabilization mechanism set in the base, and a prism fixed to the image stabilization mechanism. This image stabilization mechanism has a complex structure and is difficult to manufacture and assemble. It often uses a spring and ball structure, and the spring is prone to breakage and deformation, which may lead to image stabilization failure. At the same time, this image stabilization mechanism uses the same mechanism as the rotation center for image stabilization in two directions, which causes crosstalk during image stabilization in two directions and reduces the image stabilization effect.

[0004] Therefore, it is necessary to provide a new prism stabilization mechanism and camera module to solve the above problems. Technical solutions

[0005] The technical problem to be solved by the present invention is to provide a prism stabilization mechanism with good image stabilization effect.

[0006] To address the aforementioned technical problems, in a first aspect, embodiments of the present invention provide a prism stabilization mechanism, comprising a base having a receiving space, a prism carrier rotatably disposed within the base, a prism assembly fixed to the prism carrier, a bracket fixed to the side of the base away from the prism carrier, and a driving member for driving the prism carrier to rotate; the bracket includes a bracket body fixed to the base, two arcuate portions protruding from the side of the bracket body near the prism carrier, and a first arcuate track extending along a first direction formed by the recess of each of the arcuate portions near the side of the prism carrier.

[0007] The prism carrier includes a carrier body fixed in the base, a mounting groove formed by the recess of the carrier body, a mounting portion protruding from the side of the carrier body near the bracket, and two parallel second arc-shaped tracks formed by the recess of the mounting portion near the bracket, which extend along a second direction; the first direction is perpendicular to the second direction.

[0008] The prism anti-shake mechanism further includes ball bearings, magnetic magnets, and magnetic pole pieces; the ball bearings are respectively clamped between the first arc-shaped track and the second arc-shaped track and form a rolling connection; the magnetic magnets are fixed to the mounting part, the magnetic pole pieces are fixed to the bracket body, the magnetic magnets and the magnetic pole pieces are spaced apart and opposite to each other and magnetically attracted to each other; the driving member drives the prism carrier to move along the first arc-shaped track and / or the second arc-shaped track.

[0009] Preferably, the driving component includes a first driving assembly and a second driving assembly; the first driving assembly and the second driving assembly are respectively fixed to adjacent sides of the prism carrier; the first driving assembly is used to drive the prism carrier to move along the first arc-shaped track, and the second driving assembly is used to drive the prism carrier to move along the second arc-shaped track.

[0010] Preferably, the first driving component includes a first magnet fixed to one side of the prism carrier and a first driving coil fixed to the base, wherein the first driving coil is disposed opposite to the first magnet and the first driving coil is located within the magnetic field range of the first magnet.

[0011] The second driving assembly includes a second magnet fixed to the other side of the prism carrier and a second driving coil fixed to the base. The first magnet and the second magnet are respectively located on adjacent sides of the prism carrier. The second driving coil is arranged opposite to the second magnet and is located within the magnetic field range of the second magnet.

[0012] Preferably, the base includes a base body supporting the prism carrier, a first sidewall formed by bending and extending from opposite sides of the base body toward the side closer to the prism carrier, and a second sidewall and a third sidewall formed by bending and extending from the other opposite sides of the base body toward the side closer to the prism carrier; the second sidewall is provided with a first through groove therethrough, and the bracket is installed in the first through groove.

[0013] Preferably, the prism stabilization mechanism further includes a circuit board, which is fixed to the outside of the base. The first drive coil and the second drive coil are respectively fixed to the circuit board, and the first drive coil and the second drive coil are electrically connected to the circuit board.

[0014] Secondly, embodiments of the present invention provide a camera module, including a prism stabilization mechanism as described above, a lens assembly disposed on the light reflection path of the prism assembly, and a photosensitive assembly disposed on the light propagation path of the lens assembly.

[0015] Preferably, the lens assembly includes a first lens assembly, which is fixed to the base, and the incident surface of the first lens assembly is spaced apart from and opposite to the exit surface of the prism assembly.

[0016] Preferably, the lens assembly further includes a second lens assembly, which is spaced apart from the first lens assembly on the side away from the prism carrier; the exit surface of the first lens assembly corresponds to the incident surface of the second lens assembly, and the optical axis emitted from the exit surface of the second lens assembly extends to the outside of the base; the optical axes of the first lens assembly and the second lens assembly coincide.

[0017] Preferably, the camera module further includes a mounting base, which is mounted on the base and disposed opposite to the first sidewall. The mounting base is slidably connected to the base, and the second lens assembly is fixed to the mounting base.

[0018] Preferably, the camera module further includes a third driving component, which includes a third driving coil and a third magnet; the third magnet is fixed to the side of the mounting base near the base, the third driving coil is fixed to the base, the third driving coil and the third magnet are spaced apart and opposite each other, and the third driving coil is located within the magnetic field range of the third magnet; after the third driving coil is energized, it drives the third magnet to move along the direction of the optical axis to achieve focusing; both the first direction and the second direction are perpendicular to the optical axis; the circuit board is electrically connected to the third driving coil. Beneficial effects

[0019] Compared with existing technologies, the prism stabilization mechanism of this invention uses a prism carrier mounted on a base for mounting the prism. A support on the side of the base away from the prism carrier is used by a drive unit to rotate the prism carrier. A first arc-shaped track on the support and a second arc-shaped track on the prism carrier are connected by ball bearings. A magnetic stone is fixed to the mounting part, and a magnetic pole piece is fixed to the support body. The magnetic stone and the magnetic pole piece are spaced apart, and the ball bearings are fixed by the magnetic attraction between the magnetic stone and the magnetic plate. The first and second arc-shaped tracks limit the direction of movement, and with the ball bearings, crosstalk between the two directions can be avoided during stabilization. Simultaneously, the track and ball bearing structure is more reliable and performs better, avoiding the deformation and breakage of springs that can cause stabilization failure. This structure has fewer ball bearings, and they are single-layer ball bearings, resulting in fewer components and a smaller overall size, conforming to the trend of miniaturization in mobile phone cameras. The overall structure is simple and easy to assemble, avoiding the risks associated with complex assembly processes. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0021] Figure 1 is a three-dimensional structural schematic diagram of the camera module provided in Embodiment 1 of the present invention;

[0022] Figure 2 is a schematic diagram of the internal structure of the camera module provided in Embodiment 1 of the present invention;

[0023] Figure 3 is an exploded view of the internal structure of the camera module provided in Embodiment 1 of the present invention;

[0024] Figure 4 is a cross-sectional view along line AA in Figure 1;

[0025] Figure 5 is a schematic diagram of the base of the prism anti-shake mechanism provided in Embodiment 2 of the present invention;

[0026] Figure 6 is a schematic diagram of the prism carrier of the prism stabilization mechanism provided in Embodiment 2 of the present invention;

[0027] Figure 7 is a structural schematic diagram of the bracket of the prism anti-shake mechanism provided in Embodiment 2 of the present invention. Embodiments of the present invention

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1

[0030] Please refer to Figures 1-4. This embodiment of the invention provides a camera module 200, including a prism stabilization mechanism 100, a lens assembly 10 disposed on the light reflection path of the prism group 3, and a photosensitive assembly 13 disposed on the light propagation path of the lens assembly 10. The photosensitive assembly 13 receives images, which are transmitted through the lens assembly 10 to the prism group 3. The rotation of the prism stabilization mechanism 100 achieves image stabilization of the prism group 3, thereby improving the camera performance of the camera module 200.

[0031] In this embodiment, the lens assembly 10 includes a first lens assembly 110, which is fixed to the base 1. The incident surface of the first lens assembly 110 is spaced apart from and opposite to the exit surface of the prism assembly 3.

[0032] In this embodiment, the lens assembly 10 further includes a second lens assembly 120, which is spaced apart from the first lens assembly 110 on the side away from the prism carrier 2; the exit surface of the first lens assembly 110 corresponds to the incident surface of the second lens assembly 120, and the optical axis emitted from the exit surface of the second lens assembly 120 extends to the outside of the base 1; the optical axes of the first lens assembly 110 and the second lens assembly 120 coincide.

[0033] In this embodiment, the camera module 200 further includes a fixing base 11, which is mounted on the base 1 and disposed opposite to the first side wall 102. The fixing base 11 is slidably connected to the base 1, and the second lens assembly 120 is fixed to the fixing base 11. The position of the second lens assembly 120 is adjusted by moving the fixing base 11, thereby achieving the focusing function.

[0034] In this embodiment, the camera module 200 further includes a third driving component 12, which includes a third driving coil 121 and a third magnet 122. The third magnet 122 is fixed to the side of the mounting base 11 near the base 1, and the third driving coil 121 is fixed to the base 1. The third driving coil 121 and the third magnet 122 are spaced apart and opposite each other, and the third driving coil 121 is located within the magnetic field range of the third magnet 122. When the third driving coil 121 is energized, it drives the third magnet 122 to move along the direction of the optical axis to achieve focusing. Both the first direction and the second direction are perpendicular to the optical axis. The circuit board is electrically connected to the third driving coil. An external power supply is connected to the side of the circuit board 9 away from the base 1, which facilitates the circuit board 9 to supply power to the first driving coil 511, the second driving coil 521, and the third driving coil 121 respectively.

[0035] In this embodiment, the third sidewall 104 is provided with a second through groove 106, the first sidewall 102 is provided with a first through hole 107, the base body 101 is provided with a second through hole 108, the third drive assembly 12 is disposed in the second through groove 106, the first drive coil 511 is disposed in the first through hole 107, and the second drive coil 521 is disposed in the second through hole 108.

[0036] In this embodiment, the photosensitive component 13 is a light sensor, and the light sensor is spaced apart on the side of the second lens component 120 away from the first lens component 110.

[0037] Example 2

[0038] Please refer to Figures 1-7. This embodiment of the invention provides a prism stabilization mechanism 100, including a base 1 with a receiving space, a prism carrier 2 rotatably disposed within the base 1, a prism assembly 3 fixed to the prism carrier 2, a bracket 4 fixed to the side of the base 1 away from the prism carrier 2, and a driving component 5 for driving the prism carrier 2 to rotate. The base 1 is used to mount the prism carrier 2, the bracket 4, and the driving component 5.

[0039] The support 4 includes a support body 41 fixed to the base 1, two arc-shaped portions 42 protruding from the side of the support body 41 near the prism carrier 2, and a first arc-shaped track 43 extending along a first direction formed by the recess of each arc-shaped portion 42 near the side of the prism carrier 2. Optionally, there are two first arc-shaped tracks 43 arranged opposite to each other.

[0040] In this embodiment, the prism stabilization mechanism 100 also includes a housing 15 disposed above the prism carrier 2. The housing 15 is fixed to the base 1 and covers and protects the internal prism carrier 2, bracket 4 and drive component 5.

[0041] The prism carrier 2 includes a carrier body 21 fixed to the base 1, a mounting groove 22 formed by the recess of the carrier body 21, a mounting portion 23 protruding from the side of the carrier body 21 near the support 4, and two parallel second arc-shaped tracks 24 extending along a second direction formed by the recess of the mounting portion 23 near the support 4; the first direction and the second direction are perpendicular to each other. The first arc-shaped track 43 and the second arc-shaped track 24 are perpendicular to each other. The center of the first arc-shaped track 43 is defined as the rotation center of the first rotation axis 16, and the center of the second arc-shaped track 24 is defined as the rotation center of the second rotation axis 17, and the first rotation axis 16 and the second rotation axis 17 are perpendicular to each other. Optionally, there are two sets of second arc-shaped tracks 24, with two tracks arranged side by side in each set, and each set of second arc-shaped tracks 24 corresponds to one of the first arc-shaped tracks 43.

[0042] The prism stabilization mechanism 100 further includes ball bearings 6, magnetic stones 7, and magnetic pole pieces 8. The ball bearings 6 are sandwiched between the first arc-shaped track 43 and the second arc-shaped track 24, forming a rolling connection. The magnetic stones 7 are fixed to the mounting part 23, and the magnetic pole pieces 8 are fixed to the support body 41. The magnetic stones 7 and the magnetic pole pieces 8 are spaced apart and opposite to each other, and are magnetically attracted to each other. The driving member 5 drives the prism carrier 2 to move along the first arc-shaped track 43 and / or the second arc-shaped track 24. There are four ball bearings 6, and every two ball bearings 6 are located at the intersection of the first arc-shaped track 43 and the second arc-shaped track 24. The magnetic stones 7 are located on the side of the prism carrier 2 near the support 4, and the magnetic pole pieces are located on the side of the support 4 near the prism carrier 2. By limiting the movement direction through the first arc-shaped track 43 and the second arc-shaped track 24, and in conjunction with the ball bearings 6, crosstalk between the two directions can be avoided during image stabilization. At the same time, the track and ball bearing 6 structure is more reliable and has better performance, while avoiding the deformation and breakage of the spring sheet caused by the use of spring sheet, which would lead to image stabilization failure. This structure has fewer balls 6, and they are single-layer balls 6. With fewer parts, the overall size is also smaller, which is in line with the trend of miniaturization of mobile phone cameras. The overall structure is simple and easy to assemble, avoiding the risks associated with complex assembly processes.

[0043] In this embodiment, the driving component 5 includes a first driving component 51 and a second driving component 52; the first driving component 51 and the second driving component 52 are respectively fixed to adjacent sides of the prism carrier 2; the first driving component 51 is used to drive the prism carrier 2 to move along the first arc-shaped track 43, and the second driving component 52 is used to drive the prism carrier 2 to move along the second arc-shaped track 24.

[0044] In this embodiment, the first driving assembly 51 includes a first magnet 512 fixed to one side of the prism carrier 2 and a first driving coil 511 fixed to the base 1. The first driving coil 511 is disposed opposite to the first magnet 512, and the first driving coil 511 is located within the magnetic field range of the first magnet 512. Two first magnets 512 are arranged side-by-side and embedded in the base 1. By energizing the first driving coil 511 and mutually driving the first magnets 512, the prism carrier 2 is driven to move along the first arc-shaped track 43 with the first rotation axis 16 as the rotation center, thus achieving anti-shake function in the first direction.

[0045] The second driving assembly 52 includes a second magnet 522 fixed to the other side of the prism carrier 2 and a second driving coil 521 fixed to the base 1. The first magnet 512 and the second magnet 522 are respectively located on adjacent sides of the prism carrier 2. The second driving coil 521 is arranged opposite to the second magnet 522 and is located within the magnetic field range of the second magnet 522. Two second magnets 522 are arranged side-by-side and embedded in the base 1. By energizing the second driving coil 521 and mutually driving the second magnets 522, the prism carrier 2 is driven to move along the second arc-shaped track 24 with the second rotation axis 17 as the rotation center, thus achieving the second-direction anti-shake function.

[0046] In this embodiment, the base 1 includes a base body 101 supported by the prism carrier 2, a first sidewall 102 formed by bending and extending from opposite sides of the base body 101 toward the side closer to the prism carrier 2, and a second sidewall 103 and a third sidewall 104 formed by bending and extending from the other opposite sides of the base body 101 toward the side closer to the prism carrier 2. The second sidewall 103 is provided with a first through groove 105, and the bracket 4 is installed in the first through groove 105. This facilitates the assembly of the bracket 4 and the base 1.

[0047] In this embodiment, the prism stabilization mechanism 100 further includes a circuit board 9, which is fixed to the outside of the base 1. The first drive coil 511 and the second drive coil 521 are respectively fixed to the circuit board 9, and the first drive coil 511 and the second drive coil 521 are electrically connected to the circuit board 9. An external power supply is connected to the side of the circuit board 9 away from the base 1, which facilitates the circuit board 9 to supply power to the first drive coil 511 and the second drive coil 521 respectively.

[0048] Optionally, circuit board 9 is an FPC circuit board, which has good conductivity, a flexible structure, and is easy to install.

[0049] Compared with related technologies, the prism stabilization mechanism of this invention uses a prism carrier on the base for mounting the prism, and a support on the side of the base away from the prism carrier. A drive unit drives the prism carrier to rotate. A first arc-shaped track on the support and a second arc-shaped track on the prism carrier are connected by ball bearings. A magnetic stone is fixed to the mounting part, and a magnetic pole piece is fixed to the support body. The magnetic stone and the magnetic pole piece are spaced apart, and the ball bearings are fixed by the magnetic attraction between the magnetic stone and the magnetic plate. The first and second arc-shaped tracks limit the direction of movement, and with the ball bearings, crosstalk between the two directions can be avoided during stabilization. At the same time, the track and ball bearing structure is more reliable and has better performance, while avoiding the deformation and breakage of the spring sheet caused by the use of spring sheet, which leads to stabilization failure. This structure has fewer ball bearings, and they are single-layer ball bearings. The number of parts is smaller, and the overall size is smaller, which is in line with the trend of miniaturization of mobile phone cameras. The overall structure is simple and easy to assemble, avoiding the risks associated with complex assembly processes.

[0050] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A prism stabilization mechanism, comprising a base having a receiving space, a prism carrier rotatably disposed within the base, a prism assembly fixed to the prism carrier, a bracket fixed to the side of the base away from the prism carrier, and a driving member for driving the prism carrier to rotate; characterized in that, The bracket includes a bracket body fixed to the base, two arc-shaped portions protruding from the side of the bracket body near the prism carrier, and a first arc-shaped track extending in a first direction formed by the recess of each arc-shaped portion near the side of the prism carrier. The prism carrier includes a carrier body fixed in the base, a mounting groove formed by the recess of the carrier body, a mounting portion protruding from the side of the carrier body near the bracket, and two parallel second arc-shaped tracks formed by the recess of the mounting portion near the bracket, which extend along a second direction; the first direction is perpendicular to the second direction. The prism anti-shake mechanism further includes ball bearings, magnetic magnets, and magnetic pole pieces; the ball bearings are respectively clamped between the first arc-shaped track and the second arc-shaped track and form a rolling connection; the magnetic magnets are fixed to the mounting part, the magnetic pole pieces are fixed to the bracket body, the magnetic magnets and the magnetic pole pieces are spaced apart and opposite to each other and magnetically attracted to each other; the driving member drives the prism carrier to move along the first arc-shaped track and / or the second arc-shaped track.

2. The prism stabilization mechanism according to claim 1, characterized in that, The driving component includes a first driving assembly and a second driving assembly; the first driving assembly and the second driving assembly are respectively fixed to adjacent sides of the prism carrier; the first driving assembly is used to drive the prism carrier to move along the first arc-shaped track, and the second driving assembly is used to drive the prism carrier to move along the second arc-shaped track.

3. The prism stabilization mechanism according to claim 2, characterized in that, The first driving assembly includes a first magnet fixed to one side of the prism carrier and a first driving coil fixed to the base. The first driving coil is disposed opposite to the first magnet and is located within the magnetic field range of the first magnet. The second driving assembly includes a second magnet fixed to the other side of the prism carrier and a second driving coil fixed to the base. The first magnet and the second magnet are respectively located on adjacent sides of the prism carrier. The second driving coil is arranged opposite to the second magnet and is located within the magnetic field range of the second magnet.

4. The prism stabilization mechanism according to claim 3, characterized in that, The base includes a base body supporting the prism carrier, a first sidewall formed by bending and extending from opposite sides of the base body toward the side closer to the prism carrier, and a second sidewall and a third sidewall formed by bending and extending from the other opposite sides of the base body toward the side closer to the prism carrier; the second sidewall is provided with a first through groove therethrough, and the bracket is installed in the first through groove.

5. The prism stabilization mechanism according to claim 3, characterized in that, The prism anti-shake mechanism also includes a circuit board, which is fixed to the outside of the base. The first drive coil and the second drive coil are respectively fixed to the circuit board, and the first drive coil and the second drive coil are respectively electrically connected to the circuit board.

6. A camera module, characterized in that, It includes the prism stabilization mechanism as described in any one of claims 1-5, a lens assembly disposed on the light reflection path of the prism group, and a photosensitive component disposed on the light propagation path of the lens assembly.

7. The camera module according to claim 6, characterized in that, The lens assembly includes a first lens assembly, which is fixed to the base, and the incident surface of the first lens assembly is spaced apart from and opposite to the exit surface of the prism assembly.

8. The camera module according to claim 7, characterized in that, The lens assembly further includes a second lens assembly, which is spaced apart from the first lens assembly on the side away from the prism carrier; the exit surface of the first lens assembly corresponds to the incident surface of the second lens assembly, and the optical axis emitted from the exit surface of the second lens assembly extends to the outside of the base; the optical axes of the first lens assembly and the second lens assembly coincide.

9. The camera module according to claim 8, characterized in that, The camera module also includes a mounting base, which is installed on the base and disposed opposite to the first side wall. The mounting base is slidably connected to the base, and the second lens assembly is fixed to the mounting base.

10. The camera module according to claim 9, characterized in that, The camera module further includes a third driving component, which includes a third driving coil and a third magnet. The third magnet is fixed to the side of the mounting base near the base, and the third driving coil is fixed to the base. The third driving coil and the third magnet are spaced apart and opposite each other, and the third driving coil is located within the magnetic field range of the third magnet. When the third driving coil is energized, it drives the third magnet to move along the direction of the optical axis to achieve focusing. The first direction and the second direction are both perpendicular to the optical axis. The circuit board is electrically connected to the third driving coil.

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