Prism anti-shake mechanism and camera module

Abstract

The invention provides a prism anti-shake mechanism and a camera module. The prism anti-shake mechanism comprises a base with a containing space, a prism carrier rotationally arranged in the base, a prism set fixed to the prism carrier, a support fixed to the side, away from the prism carrier, of the base, and a driving part used for driving the prism carrier to rotate. The bracket comprises a bracket body fixed on the base, an arc-shaped part and a first arc-shaped track which is formed by recessing one side, close to the prism carrier, of the arc-shaped part and extends along a first direction; the prism carrier comprises a carrier body, a mounting groove, a mounting part and two second arc-shaped rails which are parallel to each other and extend along a second direction; the first direction is perpendicular to the second direction; the prism anti-shake mechanism further comprises a ball, a magnetic attraction magnet and a magnetic pole piece. And the driving piece drives the prism carrier to move along the first arc-shaped track and / or the second arc-shaped track. Compared with the prior art, the prism anti-shake mechanism is good in anti-shake effect.

Description

[Technical field]

[0001] The present invention relates to the field of camera technology, and in particular to a prism anti-shake mechanism and a camera module. [Background technology]

[0002] Optical image stabilization of mobile phone cameras is a platform stabilization technology that aims to reduce the impact of hand shaking or environmental influences on the stability of imaging during the photo shooting process. This often leads to problems such as blurred and distorted images. At this time, the optical image stabilization technology of the camera can play an important role. Optical image stabilization uses a purely optical method to correct and optically compensate for the jitter. The optical image stabilization of the camera uses a mechanical stabilization device, which is more reliable and produces clearer and more natural images.

[0003] The prism anti-shake mechanism in the related art includes a base, an anti-shake mechanism arranged in the base, and a prism fixed to the anti-shake mechanism; the anti-shake mechanism has a complex structure and is difficult to manufacture and assemble. A spring piece plus a ball bearing structure is commonly used, and there is a risk of the spring piece breaking and deforming, resulting in anti-shake failure; at the same time, the anti-shake mechanism uses the same mechanism as the rotation center for anti-shake in two directions, which causes crosstalk in the anti-shake process in two directions, thereby reducing the anti-shake effect.

[0004] Therefore, it is necessary to provide a new prism anti-shake mechanism and camera module to solve the above problems. [Summary of the invention]

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

[0006] To solve the above technical problems, in a first aspect, an embodiment of the present invention provides a prism anti-shake mechanism, comprising a base having a receiving space, a prism carrier rotatably disposed in the base, a prism group fixed to the prism carrier, a bracket fixed to a side of the base away from the prism carrier, and a driving member for driving the prism carrier to rotate; the bracket comprises a bracket body fixed to the base, two arc-shaped portions protruding from a side of the bracket body close to the prism carrier, and a first arc-shaped track extending along a first direction formed by a depression on a side of each of the arc-shaped portions close to the prism carrier;

[0007] The prism carrier comprises a carrier body fixed in the base, a mounting groove formed by a depression of the carrier body, a mounting portion formed by a protrusion of a side of the carrier body close to the bracket, and two second arc-shaped tracks formed by a depression of a side of the mounting portion close to the bracket and parallel to each other and extending along a second direction; the first direction and the second direction are perpendicular to each other;

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

[0009] Preferably, the driving member includes a first driving component and a second driving component; the first driving component and the second driving component are respectively fixed on two adjacent sides of the prism carrier; the first driving component is used to drive the prism carrier to move along the first curved track, and the second driving component is used to drive the prism carrier to move along the second curved track.

[0010] Preferably, the first driving assembly comprises a first magnetic steel fixed to one side of the prism carrier and a first driving coil fixed to the base, the first driving coil is arranged opposite to the first magnetic steel, and the first driving coil is located within the magnetic field range of the first magnetic steel;

[0011] The second driving component 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 two adjacent sides of the prism carrier; the second driving coil is arranged opposite to the second magnet and the second driving coil 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 side wall formed by bending and extending from two opposite sides of the base body toward a side close to the prism carrier, and a second side wall and a third side wall formed by bending and extending from the other two opposite sides of the base body toward a side close to the prism carrier; the second side wall is provided with a first through groove running through it, and the bracket is installed in the first through groove.

[0013] Preferably, the prism anti-shake mechanism also includes a circuit board, the circuit board 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.

[0014] In a second aspect, an embodiment of the present invention provides a camera module, including a prism anti-shake mechanism as described above, a lens assembly arranged on a light reflection path of the prism assembly, and a photosensitive assembly arranged on a light propagation path of the lens assembly.

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

[0016] Preferably, the lens assembly also includes a second lens assembly, which is spaced apart from the side of the first lens assembly 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 reaches the outside of the base; the optical axes of the first lens assembly and the second lens assembly coincide.

[0017] Preferably, the camera module also includes a fixing seat, which is mounted on the base and arranged opposite to the first side wall, the fixing seat and the base are slidably connected, and the second lens assembly is fixed to the fixing seat.

[0018] Preferably, the camera module also includes a third driving component, and the third driving component includes a third driving coil and a third magnet; the third magnet is fixed to a side of the fixing seat close to the base, and the third driving coil is fixed to the base, the third driving coil is spaced apart from and opposite to the third magnet, and the third driving coil is located within the magnetic field of the third magnet, and 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.

[0019] Compared with the related art, in the prism anti-shake mechanism of the present invention, a prism carrier is arranged on the base for installing the prism, and a bracket on the side of the base away from the prism carrier and a driving member are used to drive the prism carrier to rotate; a first arc track arranged on the bracket and a second arc track arranged on the prism carrier are connected through ball matching, a magnetic magnet is fixed to the mounting portion, a magnetic pole piece is fixed to the bracket body, the magnetic magnet and the magnetic pole piece are arranged relatively spaced apart, and the ball is fixed by the magnetic attraction force between the magnetic magnet and the magnetic conductive sheet; the first arc track and the second arc track are used to limit the movement direction and cooperate with the ball to avoid crosstalk in two directions during the anti-shake process; at the same time, the track and ball structure are more reliable and have better performance, and at the same time, the deformation and breakage of the spring caused by the use of the spring to prevent the anti-shake failure; this structure has a small number of balls, and they are single-layer balls, with a small number of components and a smaller overall size, which is in line with the development trend of miniaturization of mobile phone cameras; the overall structure is simple and easy to assemble, avoiding the related risks caused by the complex assembly process.

Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 work, among which:

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

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

[0023] Figure 3 A schematic diagram of the internal structure of the camera module provided in the first embodiment of the present invention;

[0024] Figure 4 For along Figure 1 Sectional view along line AA;

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

[0026] Figure 6 A schematic structural diagram of a prism carrier of a prism anti-shake mechanism provided in Embodiment 2 of the present invention;

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

[0028] The following will be combined with the 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0029] Embodiment 1

[0030] See also Figure 1-Figure 4 As shown, an embodiment of the present invention provides a camera module 200, including a prism anti-shake mechanism 100, a lens assembly 10 disposed on the light reflection path of the prism group 3, and a photosensitive component 13 disposed on the light propagation path of the lens assembly 10. The image is received by the photosensitive component 13 and transmitted through the lens assembly 10 to the prism group 3, and the prism anti-shake mechanism 100 rotates to achieve anti-shake 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 , and an incident surface of the first lens assembly 110 is spaced apart from and opposite to an exit surface of the prism assembly 3 .

[0032] In this embodiment, the lens assembly 10 also includes a second lens assembly 120, which is spaced apart from the side of the first lens assembly 110 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 is extended to the outside of the base 1; the optical axes of the first lens assembly 110 and the second lens assembly 120 coincide with each other.

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

[0034] In this embodiment, the camera module 200 also includes a third drive component 12, and the third drive component 12 includes a third drive coil 121 and a third magnetic steel 122; the third magnetic steel 122 is fixed to the side of the fixing seat 11 close to the base 1, the third drive coil 121 is fixed to the base 1, the third drive coil 121 is spaced and opposite to the third magnetic steel 122, and the third drive coil 121 is located within the magnetic field range of the third magnetic steel 122, and the third drive coil 121 drives the third magnetic steel 122 to move along the direction of the optical axis to achieve focusing after being energized; the first direction and the second direction are both perpendicular to the optical axis. The circuit board is electrically connected to the third drive coil. The side of the circuit board 9 away from the base 1 is used to connect an external power supply, so that the circuit board 9 can supply power to the first drive coil 511, the second drive coil 521 and the third drive coil 121 respectively.

[0035] In this embodiment, the third side wall 104 is provided with a second through groove 106, the first side wall 102 is penetrated by a first through hole 107, the base body 101 is penetrated by a second through hole 108, the third driving component 12 is arranged in the second through groove 106, the first driving coil 511 is arranged in the first through hole 107, and the second driving coil 521 is arranged 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 and arranged on a side of the second lens component 120 away from the first lens component 110 .

[0037] Embodiment 2

[0038] See also Figure 1-Figure 7 As shown, an embodiment of the present invention provides a prism anti-shake mechanism 100, comprising a base 1 having a receiving space, a prism carrier 2 rotatably disposed in the base 1, a prism group 3 fixed to the prism carrier 2, a bracket 4 fixed to a side of the base 1 away from the prism carrier 2, and a driving member 5 for driving the prism carrier 2 to rotate. The base 1 is used to install the prism carrier 2, the bracket 4 and the driving member 5.

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

[0040] In this embodiment, the prism anti-shake mechanism 100 further includes a housing 15 disposed above the prism carrier 2 . The housing 15 is fixed to the base 1 and covers and protects the prism carrier 2 , the bracket 4 and the driving member 5 inside.

[0041] The prism carrier 2 includes a carrier body 21 fixed to the base 1, a mounting groove 22 formed by a depression of the carrier body 21, a mounting portion 23 formed by a protrusion of a side of the carrier body 21 close to the bracket 4, and two second arc tracks 24 formed by a depression of a side of the mounting portion 23 close to the bracket 4, which are parallel to each other and extend along a second direction; the first direction and the second direction are perpendicular to each other. The first arc track 43 and the second arc track 24 are perpendicular to each other. The center of the first arc track 43 is defined as the rotation center of the first rotation axis 16, and the center of the second arc 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, the second arc tracks 24 are in two groups and two are arranged side by side in each group, and the same group of second arc tracks 24 corresponds to one of its first arc tracks 43.

[0042] The prism anti-shake mechanism 100 further includes a ball 6, a magnetic magnet 7 and a magnetic pole piece 8; the ball 6 is sandwiched between the first arc track 43 and the second arc track 24 and forms a rolling connection; the magnetic magnet 7 is fixed to the mounting portion 23, the magnetic pole piece 8 is fixed to the bracket body 41, the magnetic magnet 7 and the magnetic pole piece 8 are spaced and arranged opposite to each other and magnetically attracted to each other; the driving member 5 drives the prism carrier 2 to move along the first arc track 43 and / or the second arc track 24. There are four ball 6, and every two ball 6 are arranged at the intersection of the first arc track 43 and the second arc track 24. The magnetic magnet 7 is arranged on the side of the prism carrier 2 close to the bracket 4, and the magnetic conductive sheet is arranged on the side of the bracket 4 close to the prism carrier 2. By limiting the movement direction by the first curved track 43 and the second curved track 24 and cooperating with the ball 6, crosstalk in two directions during the anti-shake process can be avoided; at the same time, the track and ball 6 structure is more reliable and the performance is better, while avoiding the deformation and breakage of the spring caused by the use of springs, which leads to the failure of anti-shake; this structure has a small number of balls 6, and is a single-layer ball 6, with a small number of components and a smaller overall size, which is in line with the development trend of miniaturization of mobile phone cameras; the overall structure is simple and easy to assemble, avoiding the risks associated with the complex assembly process.

[0043] In this embodiment, the driving member 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 the adjacent two sides of the prism carrier 2; the first driving component 51 is used to drive the prism carrier 2 to move along the first curved track 43, and the second driving component 52 is used to drive the prism carrier 2 to move along the second curved track 24.

[0044] In this embodiment, the first driving component 51 includes a first magnetic steel 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 arranged opposite to the first magnetic steel 512, and the first driving coil 511 is located within the magnetic field range of the first magnetic steel 512. The first magnetic steel 512 includes two and is arranged side by side, and the first magnetic steel 512 is embedded in the base 1. The first driving coil 511 is energized and mutually driven by the first magnetic steel 512 to drive the prism carrier 2 to move along the first arc track 43 with the first rotation axis 16 as the rotation center, thereby realizing the anti-shake function in the first direction.

[0045] The second driving component 52 includes a second magnetic steel 522 fixed to the other side of the prism carrier 2 and a second driving coil 521 fixed to the base 1. The first magnetic steel 512 and the second magnetic steel 522 are respectively located on two adjacent sides of the prism carrier 2; the second driving coil 521 is arranged opposite to the second magnetic steel 522 and the second driving coil 521 is located within the magnetic field range of the second magnetic steel 522. The second magnetic steel 522 includes two and is arranged side by side, and the second magnetic steel 522 is embedded in the base 1. The second driving coil 521 is energized and mutually driven by the second magnetic steel 522 to drive the prism carrier 2 to move along the second arc track 24 with the second rotation axis 17 as the rotation center, thereby realizing the anti-shake function in the second direction.

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

[0047] In this embodiment, the prism anti-shake mechanism 100 further includes a circuit board 9, the circuit board 9 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 respectively electrically connected to the circuit board 9. The side of the circuit board 9 away from the base 1 is used to connect to an external power source, so that the circuit board 9 can supply power to the first drive coil 511 and the second drive coil 521 respectively.

[0048] Optionally, the circuit board 9 is an FPC circuit board, which has good conductive effect, soft structure and convenient installation.

[0049] Compared with the related art, in the prism anti-shake mechanism of the present invention, a prism carrier is arranged on the base for installing the prism, and a bracket on the side of the base away from the prism carrier and a driving member are used to drive the prism carrier to rotate; a first arc track arranged on the bracket and a second arc track arranged on the prism carrier are connected through ball matching, a magnetic magnet is fixed to the mounting portion, a magnetic pole piece is fixed to the bracket body, the magnetic magnet and the magnetic pole piece are arranged relatively spaced apart, and the ball is fixed by the magnetic attraction force between the magnetic magnet and the magnetic conductive sheet; the first arc track and the second arc track are used to limit the movement direction and cooperate with the ball to avoid crosstalk in two directions during the anti-shake process; at the same time, the track and ball structure are more reliable and have better performance, and at the same time, the deformation and breakage of the spring caused by the use of the spring to prevent the anti-shake failure; this structure has a small number of balls, and they are single-layer balls, with a small number of components and a smaller overall size, which is in line with the development trend of miniaturization of mobile phone cameras; the overall structure is simple and easy to assemble, avoiding the related risks caused by the complex assembly process.

[0050] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A prism anti-shake mechanism, comprising a base with a receiving space, a prism carrier rotatably disposed in the base, a prism group fixed to the prism carrier, a bracket fixed to a 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 comprises a bracket body fixed to the base, two arc-shaped portions formed by protruding from one side of the bracket body close to the prism carrier, and a first arc-shaped track extending along a first direction formed by a concave side of each arc-shaped portion close to the prism carrier; The prism carrier comprises a carrier body fixed in the base, a mounting groove formed by a depression of the carrier body, a mounting portion formed by a protrusion of a side of the carrier body close to the bracket, and two second arc-shaped tracks formed by a depression of a side of the mounting portion close to the bracket and parallel to each other and extending along a second direction; the first direction and the second direction are perpendicular to each other; The prism anti-shake mechanism also includes ball bearings, magnetic magnets and pole pieces; the ball bearings are respectively sandwiched between the first arc track and the second arc track to form a rolling connection; the magnetic magnets are fixed to the mounting portion, the pole pieces are fixed to the bracket body, the magnetic magnets and the pole pieces are spaced apart and arranged opposite to each other and are magnetically attracted to each other; the driving member drives the prism carrier to move along the first arc track and / or the second arc track.

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

3. The prism anti-shake mechanism according to claim 2, characterized in that: The first driving component includes a first magnetic steel fixed to one side of the prism carrier and a first driving coil fixed to the base, the first driving coil is arranged opposite to the first magnetic steel, and the first driving coil is located within the magnetic field range of the first magnetic steel; The second driving component 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 two adjacent sides of the prism carrier; the second driving coil is arranged opposite to the second magnet and the second driving coil is located within the magnetic field range of the second magnet.

4. The prism anti-shake mechanism according to claim 3, characterized in that: The base includes a base body supporting the prism carrier, a first side wall formed by bending and extending from two opposite sides of the base body toward a side close to the prism carrier, and a second side wall and a third side wall formed by bending and extending from the other two opposite sides of the base body toward a side close to the prism carrier; the second side wall is provided with a first through groove running through it, and the bracket is installed in the first through groove.

5. The prism anti-shake 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 comprises the prism anti-shake mechanism as described in any one of claims 1 to 5, a lens assembly arranged on the light reflection path of the prism group, and a photosensitive assembly arranged on the light propagation path of the lens assembly.

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

8. The camera module according to claim 7, characterized in that: The lens assembly also includes a second lens assembly, which is spaced apart from the first lens assembly on a side away from the prism carrier; an exit surface of the first lens assembly corresponds to an incident surface of the second lens assembly, and an 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 fixing seat, which is installed on the base and arranged opposite to the first side wall. The fixing seat is slidably connected to the base, and the second lens assembly is fixed to the fixing seat.

10. The camera module according to claim 9, characterized in that: The camera module also includes a third driving component, which includes a third driving coil and a third magnet; the third magnet is fixed to a side of the fixing seat close to the base, the third driving coil is fixed to the base, the third driving coil is spaced from and opposite to the third magnet, and the third driving coil is located within the magnetic field of the third magnet, and when energized, the third driving coil 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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