CN110780507A

CN110780507A - Anti-shake camera module and camera device

Info

Publication number: CN110780507A
Application number: CN201911072925.6A
Authority: CN
Inventors: 钞晨; 尹丽; 何鑫; 张天涯; 梁斌
Original assignee: SHENZHEN SHIZUN TECHNOLOGY Co Ltd
Current assignee: SHENZHEN SHIZUN TECHNOLOGY Co Ltd
Priority date: 2019-11-05
Filing date: 2019-11-05
Publication date: 2020-02-11

Abstract

The invention discloses an anti-shake camera module and a camera device. Wherein the module of making a video recording includes: a housing comprising a top cover and a base, a lens assembly movably secured within the housing by a first spring leaf, a drive assembly for controlling the deflection of the lens assembly in two orthogonal directions in a plane perpendicular to the optical axis, the drive assembly comprising: the annular magnets are arranged on the periphery of the annular magnets in two orthogonal directions, and each deflection coil faces to different polarities on the outer side of the annular magnets and is opposite to the current direction of two parallel wires. The invention has high electromagnetic efficiency and small volume.

Description

Anti-shake camera module and camera device

Technical Field

The present invention relates to a camera module, and more particularly to a fixed-focus or focusing anti-shake camera module and a camera device using the same.

Background

Along with the development of smart mobile phone, intelligent hardware trade, people's every aspect such as daily life, work, amusement uses the demand of shooting more and more, and is higher and higher to the functional requirement of camera, need focus faster, more sensitive, see farther, more clear to have the anti-shake function when handheld shooting, the camera volume is also littleer, and the size of the control electronic product of being convenient for itself is changeed and is carried. There is also a higher demand for motors to control the lenses. The motors in the market have respective defects, such as low electromagnetic efficiency, heavier weight, large difficulty in volume production, difficulty in focusing, slightly large volume, no anti-shake function or poor anti-shake function, short service life and the like.

Disclosure of Invention

But in order to solve the electromagnetic inefficiency of the current module of making a video recording among the prior art, the great technical problem of volume relatively, but provided anti-shake's module of making a video recording, camera device.

The invention provides a camera module, which comprises a shell consisting of an upper cover and a base, a lens assembly movably fixed in the shell through a first spring piece, and a driving assembly for controlling the lens assembly to deflect in two orthogonal directions of a plane vertical to an optical axis, wherein the driving assembly comprises: the annular magnets are arranged on the periphery of the annular magnets in two orthogonal directions, and each deflection coil faces to different polarities on the outer side of the annular magnets and is opposite to the current direction of two parallel wires.

In one embodiment, four deflection coils are uniformly arranged around the annular magnet, and the current directions of two deflection coils positioned on two sides of the annular magnet in the same orthogonal direction are the same.

In a first embodiment, the lens assembly is a lens holder with a lens mounted thereon, and the ring-shaped magnet is fixed on an outer wall of the lens holder.

In a first embodiment, the first spring plate is made of a circuit board with a spring arm, an outer fixing portion of the circuit board is fixedly connected with the housing, an inner fixing portion of the circuit board is connected with the bottom of the lens holder, the outer fixing portion and the inner fixing portion are connected through the spring arm, and an image sensor chip of the voice coil motor is disposed on the inner fixing portion.

In a second embodiment, the lens assembly includes: the lens mount of installing the camera lens, the suit is in focus the coil with at least one annular that an inboard polarity of annular magnetite is relative on the lens mount outer wall, through the second spring leaf with the lens mount or the annular magnet mount that the coil is connected of focusing, the annular magnetite is fixed on the magnet mount.

In a second embodiment, there are two annular focusing coils, and the two annular focusing coils are respectively opposite to the inner sides of the annular magnets in different polarities and have opposite current directions.

In a second embodiment, the first spring plate is made of a circuit board, an outer fixing portion of the circuit board is fixedly connected with the housing, an inner fixing portion of the circuit board is connected with the bottom of the magnet base, the outer fixing portion and the inner fixing portion are connected through a spring arm, and an image sensor chip of the voice coil motor is arranged on the inner fixing portion.

Specifically, the annular magnet is in a ring shape or a square ring shape.

Specifically, the driving assembly comprises a square coil holder fixed with the shell, and the deflection coils are fixed on the winding structures on four sides of the coil holder.

The camera shooting device provided by the invention uses the camera shooting module group in the technical scheme.

Compared with the prior art, the invention has the following advantages:

1. the efficiency is high: only one ring magnet is arranged, the magnetic field utilization rate is high, the force conversion efficiency is high, and the lens with heavier load can be supported to work.

2. Compact structure is small, simple easy volume production: the spring piece, the coil, the magnet, the lens mount and the like are distributed in a nested and stacked structure, and the structure is compact, simple and beneficial to mass production.

3. The service life is long: the spring piece can realize the working life of not less than one hundred million times through design calculation and simulation test.

Drawings

The invention is described in detail below with reference to examples and figures, in which:

fig. 1 is an external view schematically showing the present invention.

Fig. 2 is an exploded view of the first embodiment of the present invention.

Fig. 3 is a cross-sectional view of a first embodiment of the present invention.

Fig. 4 is an electromagnetic diagram of the first embodiment of the present invention.

Fig. 5 is an exploded view of a second embodiment of the present invention.

Fig. 6 is a cross-sectional view of a second embodiment of the present invention.

Fig. 7 is an electromagnetic diagram of a second embodiment of the present invention.

Detailed Description

The principles and embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 4, a fixed-focus anti-shake camera module according to a first embodiment of the present invention is shown. The parts that this tight burnt anti-shake module of making a video recording includes have: the image sensor comprises an upper cover 001, a lens 002, a magnet 003, a lens holder 004, four deflection coils 005, a coil holder 006, an image sensor chip 007, a circuit board 008 with spring arms and a base 009.

The upper cover 001 and the base 009 are connected to form a housing, and when the upper cover 001 and the base 009 are assembled into the housing, the through holes provided on the opposite surfaces of the upper cover 001 and the base 009 are opposed to form a light channel. In this embodiment, the housing is a square housing.

Be provided with the lens subassembly in the casing and control the lens subassembly and carry out the deflection motion and realize the drive assembly of anti-shake, the lens subassembly is connected with the casing movably through first spring leaf. In this embodiment, the lens assembly only includes the lens mount 004 installed with the lens 002, the outer wall of the lens mount 004 is cylindrical, a ring-shaped boss is arranged at one end close to the mount, and the lens 002 is fixed with the lens mount 004 through a threaded connection. The driving assembly includes corresponding electromagnetic structures to drive the lens mount 004 to perform a deflecting motion. Specifically, the drive assembly includes a ring-shaped magnet 003 and four coils 005 in the present embodiment. Wherein, the annular ring shaped magnet 003 is sleeved on the outer wall of the lens mount 004, the polarity distribution of the annular ring shaped magnet 003 is that two polarities are respectively arranged at two ends of the annular ring shaped magnet 003, one end faces the upper end of the lens mount in fig. 2 and 3, and the other end faces the lower end of the lens mount 004. The four deflection coils 005 are arranged around the ring magnet 003 to be fixed to the housing, the four deflection coils 005 are respectively distributed in two orthogonal directions on a plane perpendicular to the optical axis, and the directions of currents of the two deflection coils 005 arranged on opposite sides of the ring magnet 003 in the same direction are the same. Each of the deflection coils 005 has opposite current directions of two portions of wires of different polarities facing the outside of the ring magnet 003 and being parallel to each other.

In the embodiment, the first spring plate is made of the circuit board 008 with a special structural design, that is, the functions of the spring plate and the circuit board in the existing scheme are only replaced by the circuit board 008 with a special structural design. Circuit board 008 with special structural design has outer fixed part and interior fixed part, connect through the spring arm between outer fixed part and the interior fixed part, lens mount 004 is connected with the interior fixed part of taking the circuit board 008 of spring arm, four deflection coils 005 equipartitions all around are on coil mount 006, coil mount 006 and the outer fixed part bonding of circuit board 008 of taking the spring arm are fixed, and simultaneously, the outer fixed part of circuit board 008 is also fixed on base 009, the setting is between base 009 and coil mount 006, image sensor chip 007 arranges the circuit board 008 center of taking the spring arm in, the center of interior fixed part promptly. Coil holder 006 is the square frame shape, and four sides are equipped with four wire winding structures, and the winding of deflection coil 005 is individual at four wire winding structures, and coil holder 006 is used for spacing to deflection coil 005's position, can make the two parts wire that deflection coil 005 is parallel to each other be in respectively in the position of the different polarity that faces the annular magnetite outside, in other embodiments, also can change the structure of upper cover, makes the upper cover base have corresponding structure and carry on spacingly to deflection coil 005's position. When the deflection coil 005 circular telegram, can and annular magnetite 003 between produce magnetic field force, because the deflection coil 005 is fixed, magnetic field force can act on annular magnetite 003, drive the part that the module of making a video recording corresponds (camera lens 002, annular magnetite 003, lens mount 004, image sensor chip 007, take the interior fixed part of the circuit board 008 of spring arm) and deflect, the current direction and the size of four coils of effective control, make the module of making a video recording correspond the part and deflect to accomplish the camera anti-shake action.

The specific magnetic circuit principle of the first embodiment is shown in fig. 4, the section plane is a cross section of the center diameter of the motor, and in order to better explain the magnetic circuit principle, other parts except the deflection coil and the ring magnet are hidden and are subjected to imaginary processing in size ratio. Assuming that the upper half of the ring magnet 003 is an N pole and the lower half is an S pole, the magnetic induction lines start from the N pole and return to the S pole. Four deflection coils 005 wherein two relative coil current directions get into from first section, the lower half is come out, according to the left-hand rule left side coil can receive an ascending ampere force, the right side coil can receive decurrent ampere force, because deflection coil is immovable, so the annular magnetite can receive reaction force, magnetite left side atress F1 is downwards, right side atress F2 is upwards, make the annular magnetite drive whole camera module (camera lens 002, magnetite 003, lens mount 004, image sensor chip 007, take the interior fixed part of the circuit board 008 of spring arm) and make deflection motion, realize camera anti-shake function, the deflection of two directions of camera module can be realized to four coils of equipartition. The annular magnet is driven to drive other related components to rotate around an orthogonal direction perpendicular to the plane of the optical axis by generating corresponding acting forces on the annular magnet in two opposite directions along the optical axis through a group of opposite deflection coils.

As shown in fig. 5 to 7, a second embodiment of the present invention shows a zoom anti-shake camera module. The anti-shake structure of the second embodiment is the same as that of the first embodiment. However, the lens assembly has a different structure, and the second embodiment adds corresponding components to the lens assembly to realize zooming of the anti-shake camera module.

The part that this zoom anti-shake camera module includes specifically has: the lens comprises an upper cover 101, a lens 102, two second spring pieces 103, two focusing coils 104, a lens holder 105, a magnet 106, a magnet holder 107, four deflection coils 108, a coil holder 109, an image sensor chip 110, a circuit board 111 with spring arms and a base 112.

The cover 101 and base 112 are assembled into a housing in which the lens assembly is disposed in operable connection with the housing via a circuit board having spring arms. The lens assembly comprises the following components: a lens 102, two second spring pieces 103, two focusing coils 104, a lens holder 105 and a magnet holder 107. The lens 102 is fixed with the lens base 105 through screw thread connection, the two focusing coils 104 are respectively sleeved on the upper and lower ends of the lens base 105, the ring-shaped magnet 106 is adhered with the magnet base 107, the inner fixed parts of the two second spring strips 103 are respectively adhered with the upper and lower focusing coils or the lens base, the outer fixed parts of the two second spring strips 103 are adhered with the magnet base 107, the inner part of the spring strips, the lens holder 105 can move relatively to the magnet holder 107 by having a spring arm between the outer fixing portions, the magnet holder 107 of the lens assembly is connected with the inner fixing portion of the circuit board 111 with the spring arm, the outer fixing portion of the circuit board 111 with the spring arm is connected with the housing, the four deflection coils 108 are uniformly distributed around the magnet holder front and back and left and right, the four deflection coils 108 are uniformly distributed on the square coil holder 109, the coil holder 109 is fixedly connected with the outer fixing portion of the circuit board 111 with the spring arm, and the coil holder 109 and the base 112 press the outer fixing portion of the circuit board 111 in the middle. The image sensor chip 110 is disposed at the center of the circuit board 111 with the spring arms, i.e., at the center of the inner fixing portion of the circuit board 111. The two focusing coils are respectively opposite to the inner sides of the annular magnets in different polarities, and the current directions are opposite when the two focusing coils are electrified. An annular bulge for dividing the two focusing coils is arranged between the focusing coils on the lens mount. Because there is spring arm between the inner fixing part and the outer fixing part of the circuit board 111 with spring arm, the magnet seat 107 and the coil seat 109 can make relative movement through the interaction of external force, i.e. the deflection coil and the ring magnet, to drive the magnet seat to make deflection movement relative to the deflection coil, and to drive the lens seat, the focusing coil, the lens, etc. to deflect together when the magnet seat deflects. When the deflection coil 108 is electrified, magnetic field force can be generated between the deflection coil 108 and the annular magnet 106, and because the deflection coil 108 is fixed, the magnetic field force can act on the annular magnet 106 to drive the corresponding part of the camera module (the lens 102, the two spring pieces 103, the two focusing coils 104, the lens holder 105, the annular magnet 106, the magnet holder 107, the image sensor chip 110 and the inner fixing part of the circuit board 111 with the spring arms) to deflect, so that the current directions and the magnitudes of the four deflection coils are effectively controlled, the camera module is deflected, and the camera anti-shake action is completed. When the focusing coil 104 is powered on, a magnetic field force is generated between the focusing coil 104 and the magnet 106, and the magnetic field force acts on the focusing coil 104 to drive the lens 102 and the lens mount 105 to move up and down, so that the current directions and magnitudes of the two focusing coils are effectively controlled, and the focusing action of the camera is completed.

The specific magnetic circuit principle of the second embodiment is shown in fig. 7, which uses a cross section of the center diameter of the motor, and in order to better illustrate the magnetic circuit principle, other parts except the coil and the magnet are hidden and are processed in imaginary size ratio. Assuming that the upper half of the ring magnet 106 is an N pole and the lower half is an S pole, the magnetic induction lines start from the N pole and return from the S pole. The magnetic circuit principle of the four anti-shake coils 108 and the magnet 106 is the same as that of the fixed focus anti-shake module, and the details are not repeated here. The current directions of the upper focusing coil 104 and the lower focusing coil 104 are opposite, and it is assumed that the current direction of the upper focusing coil enters from the left half section and exits from the right half section and is clockwise; the current direction of the lower focusing coil enters from the right half section and exits from the left half section in the anticlockwise direction. According to the left-hand rule, the direction of the ampere force borne by the upper and lower electrified coils in the magnetic field is downward, and the upward and downward focusing coils are bonded and locked with the lens holder, so that the whole lens holder is subjected to downward force F3, the lens holder can move up and down by controlling the direction and the magnitude of the current in the coils, and the focusing action of the camera is realized.

In other embodiments, only one focusing coil may be provided, one focusing coil is only opposite to one polarity inside the ring magnet, and only one second spring plate may be used. The pushing force in focusing is accordingly weakened, but also falls within the scope of the present invention. Besides the ring shape, the magnets of the two embodiments can also adopt a square ring shape by matching with the peripheral shapes of other lens holders, and the corresponding annular focusing coil can also adopt a square ring shape.

The invention protects the camera device adopting the camera module, including but not limited to the camera used for collection and tablet computers, the camera used for notebooks and other electronic equipment with cameras, besides the camera module. The camera module has the characteristics of high electromagnetic efficiency, simple structure, easiness in mass production, capability of realizing an anti-shake function, small volume, long service life and the like.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A camera module comprising a housing including an upper cover and a base, a lens assembly movably secured in the housing by a first spring plate, and a drive assembly for controlling the deflection of the lens assembly in two orthogonal directions in a plane perpendicular to an optical axis, the drive assembly comprising: the annular magnets are arranged on the periphery of the annular magnets in two orthogonal directions, and each deflection coil faces to different polarities on the outer side of the annular magnets and is opposite to the current direction of two parallel wires.

2. The camera module of claim 1, wherein four deflection coils are uniformly arranged around the ring magnet, and two deflection coils on both sides of the ring magnet in the same orthogonal direction have the same current direction.

3. The camera module of claim 1, wherein the lens assembly is a lens holder having a lens mounted thereon, and the ring magnet is fixed to an outer wall of the lens holder.

4. The camera module of claim 3, wherein the first spring plate is made of a circuit board with spring arms, an outer fixed portion of the circuit board is fixedly connected with the housing, an inner fixed portion of the circuit board is connected with the bottom of the lens holder, the outer fixed portion and the inner fixed portion are connected through the spring arms, and an image sensor chip of the voice coil motor is disposed on the inner fixed portion.

5. A camera module according to claim 1 or 2, wherein the lens arrangement comprises: the lens mount of installing the camera lens, the suit is in focus the coil with at least one annular that an inboard polarity of annular magnetite is relative on the lens mount outer wall, through the second spring leaf with the lens mount or the annular magnet mount that the coil is connected of focusing, the annular magnetite is fixed on the magnet mount.

6. The camera module of claim 5, wherein there are two annular focusing coils, and the two annular focusing coils are respectively opposite to the inner sides of the annular magnets in different polarities and have opposite current directions.

7. The camera module of claim 5, wherein the first spring plate is made of a circuit board, an outer fixing portion of the circuit board is fixedly connected with the housing, an inner fixing portion of the circuit board is connected with the bottom of the magnet holder, the outer fixing portion and the inner fixing portion are connected through spring arms, and an image sensor chip of the voice coil motor is disposed on the inner fixing portion.

8. The camera module of any one of claims 1-7, wherein the ring magnet is in the shape of a circular ring or a square ring.

9. A camera module according to any one of claims 1 to 7, characterized in that the drive assembly comprises a rectangular frame-shaped coil holder fixed to the housing, the deflection coils being fixed to a winding structure on four sides of the coil holder.

10. An image pickup apparatus using the image pickup module according to any one of claims 1 to 9.