CN111273501A

CN111273501A - Optical unit with shake correction

Info

Publication number: CN111273501A
Application number: CN202010225511.9A
Authority: CN
Inventors: 王海涛; 韦华; 周济
Original assignee: New Shicoh Technology Co Ltd
Current assignee: New Shicoh Motor Co Ltd; New Shicoh Technology Co Ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-06-12

Abstract

The invention discloses an optical unit with shake correction, which solves the problem of single shake prevention of the conventional optical lens and adopts the technical scheme that the optical unit comprises a base, a carrier, an elastic sheet arranged at the top of the carrier for performing elastic recovery on the carrier, a coil group fixedly arranged on the outer side wall of the carrier, and a magnet group which is arranged relative to the coil group and is arranged on the base and generates electromagnetic driving force with the coil group, wherein the coil group is arranged in central symmetry relative to the carrier; the coil group comprises a first coil and a second coil which are respectively arranged on each side wall along the circumferential direction of the carrier, and the magnet group comprises a first magnet and a second magnet which are respectively arranged relative to the first coil and the second coil.

Description

Optical unit with shake correction

Technical Field

The present invention relates to optical devices, and more particularly, to an optical unit with shake correction.

Background

The motor drive unit of current optical lens through coil and the magnetite cooperation that sets up on the carrier lateral wall, can realize around X axle and around the rotation anti-shake of Y axle, and current structure is mostly diaxon anti-shake, and the anti-shake axial is more single, and the anti-shake effect is not good, still remains the space of improving.

Disclosure of Invention

The invention aims to provide an optical unit with jitter correction, which can conveniently realize anti-jitter in the rotation direction around an X/Y axis and anti-jitter in the theta direction of a Z axis, and has simple structure and good anti-jitter effect.

The technical purpose of the invention is realized by the following technical scheme:

an optical unit with shake correction comprises a base, a carrier, an elastic sheet, a coil group and a magnet group, wherein the elastic sheet is arranged at the top of the carrier and used for elastically restoring the carrier, the coil group is fixedly arranged on the outer side wall of the carrier, the magnet group is arranged opposite to the coil group and is arranged on the base and the coil group to generate electromagnetic driving force, and the first magnet and the second magnet are both multipole magnets;

the coil assembly comprises a first coil and a second coil which are arranged on each side wall along the circumferential direction of the carrier, and the magnet assembly comprises a first magnet and a second magnet which are arranged relative to the first coil and the second coil respectively.

Preferably, the coil groups are arranged in central symmetry with respect to the carrier, the coil groups on each outer side wall of the carrier are arranged in the same manner, the first coil and the second coil are both racetrack coils, the first coil is arranged at the central position of the outer side wall of the carrier, and the second coil is circumferentially positioned on one side of the first coil.

Preferably, the outer side wall of the carrier extends to form a positioning column for fixing and sleeving the coil group, the positioning column abuts against four inner corners of the first coil and the second coil, and one side of the positioning column abutting against the coil group is arranged in an arc shape; and a clamping groove for clamping and embedding the magnet group is formed in the side wall of the base.

Preferably, each of the first magnet and the second magnet is one of a single multi-pole magnet and two bipolar magnets.

Preferably, the magnetic head further includes an iron core fixed to an outer side wall of the carrier and disposed in the second coil.

In conclusion, the invention has the following beneficial effects:

through the arrangement of the coil group and the magnet group and the change of the direction of the electromagnetic driving force through controlling the current direction, when opposite directions of electromagnetic force are generated on two opposite sides, the arrangement of the first coil and the first magnet can realize the rotation trend around an X axis or a Y axis, and further realize the shift anti-shake action of the X axis or the Y axis; when the second coil and the second magnet on the two opposite sides generate electromagnetic forces in opposite directions, the forces on the four sides are arranged in the circumferential direction to form a rotating moment, and then theta-direction rotation Tilt anti-shaking action around the Z axis is realized.

Drawings

FIG. 1 is an exploded view of an optical unit;

FIG. 2 is a force diagram illustrating the rotation tendency around the X axis;

FIG. 3 is a force-bearing diagram illustrating the tendency of the rotation in the theta direction around the Z axis

Fig. 4 is an exploded view of an optical unit with an iron core.

In the figure: 1. a base; 11. a card slot; 2. a carrier; 21. a positioning column; 3. a spring plate; 41. a first coil; 42. a second coil; 51. a first magnet; 52. a second magnet; 6. and (3) an iron core.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

According to one or more embodiments, the disclosed optical unit with shake correction, as shown in fig. 1, includes a base 1, a carrier 2, a spring 3, and a coil set and a magnet set disposed on an outer sidewall of the carrier 2. The elastic sheet 3 provides support in the X/Y direction and the Z axis theta direction and provides restoring moment. For clarity, it is defined as a reference as shown in fig. 1, wherein X, Y axes are two horizontal axes of the carrier 2, respectively, Z axis is a direction of a central axis of the carrier 2, and θ direction is a circumferential angle direction around the Z axis.

As shown in fig. 1, the coil groups are arranged in a central symmetry manner along the circumferential direction of the carrier 2, and the coil groups on each side wall of the carrier 2 are arranged identically, including a first coil 41 and a second coil 42, where the first coil 41 and the second coil 42 are both racetrack coils, the first coil 41 is arranged at the central position of the outer side wall of the carrier 2, and the second coil 42 is arranged at one side of the first coil 41 along the circumferential direction and close to the side edge of the outer side wall. The outer side wall of the carrier 2 is extended with positioning columns 21, the positioning columns 21 are distributed to form a quadrilateral shape and abut against four inner corners of the first coil 41 and the second coil 42, so that the fixed sleeving is realized, the abutting of the positioning columns 21 is arranged in an arc shape at the edge of the coil assembly, the abrasion of the coil assembly is reduced, the contact area is increased, and the installation is more stable.

The second coil 42 is preferably rectangular, and has an outer side length close to the width of the side wall of the carrier 2, and the first coil 41 is preferably rectangular with a long side extending in the longitudinal direction of the side wall of the carrier 2.

The magnet group is provided around the side wall of the carrier 2 corresponding to the coil group, and includes a first magnet 51 opposed to the first coil 41 and a second magnet 52 opposed to the second coil 42. The side wall of the base 1 is provided with a clamping groove 11 for the first magnet 51 and the second magnet 52 to be fixedly clamped, so that the magnet group can be stably installed relative to the coil group.

The first magnet 51 and the second magnet 52 both adopt multi-pole magnets, so that the assembly is simple; two pieces of dipole magnet may also be used.

The polarity directions of the magnets on the left side and the right side of the carrier 2, namely the two sides of the X axis, are arranged in the same direction, when the current directions of the first coils 41 on the two opposite sides of the X axis are opposite, the left side and the right side generate forces in opposite directions, as shown in fig. 2, and then the two sides are pulled to move in opposite directions to generate a rotation trend around the X axis, so that the shift anti-shaking action of the X axis is realized, and the principle that the directions of the Y axis are the same is the same. By controlling the direction of the current in the first coil 41, the control of the direction of the rotation tendency is achieved.

When the current directions of the left and right coils of the X axis and the Y axis are opposite; forces in opposite directions are generated on the left side and the right side, the forces on the four sides are arranged in the circumferential direction to form a rotating moment, as shown in fig. 3, so that theta-direction rotation Tilt anti-shake motion around the Z axis is realized, the direction of thrust is changed by controlling the directions of currents in the first coil 41 and the second coil 42, and as shown in fig. 3, clockwise steering is realized.

As shown in fig. 4, the core 6 is provided inside the second coil 42, and electromagnetic force with respect to the second magnet 52 can be generated by the cooperation between the core 6 and the second coil 42 after the current is applied. When a repulsive force with the inherent magnetic field of the second magnet 52 is generated, the repulsive force is generated at the left side and the right side in opposite directions, and the forces at the four sides are arranged in the circumferential direction to form a rotation moment, so that the theta-direction rotation Tilt anti-shake action around the Z axis is realized, and the stress analysis is shown in fig. 3.

According to one or more embodiments, the present example discloses a camera apparatus including the optical unit with shake correction without the iron core 6 in the second coil 42 described above or the optical unit with shake correction with the iron core 6.

According to one or more embodiments, the present example discloses an electronic device, which includes the above-mentioned camera device, and the electronic device may be a device with a camera, such as a mobile phone, a computer, a tablet, a monitor, and the like.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. An optical unit with shake correction comprises a base (1) and a carrier (2), and is characterized in that: the electromagnetic driving device is characterized by further comprising an elastic sheet (3) which is arranged on the top of the carrier (2) and used for elastically restoring the carrier (2), a coil group which is fixedly arranged on the outer side wall of the carrier (2), and a magnet group which is arranged relative to the coil group and is arranged on the base (1) and the coil group to generate electromagnetic driving force;

the coil assembly comprises a first coil (41) and a second coil (42) which are arranged on each side wall along the circumferential direction of the carrier (2), the magnet assembly comprises a first magnet (51) and a second magnet (52) which are arranged relative to the first coil (41) and the second coil (42), and the first magnet and the second magnet are multipolar magnets.

2. An optical unit with jitter correction as claimed in claim 1, wherein: the coil assembly is arranged in a central symmetry mode about the carrier (2), the coil assembly on each outer side wall of the carrier (2) is arranged and arranged the same, the first coil (41) and the second coil (42) are both runway coils, the first coil (41) is arranged at the central position of the outer side wall of the carrier (2), and the second coil (42) is located on one side of the first coil (41) in the circumferential direction.

3. The optical unit with shake correction according to claim 2, wherein: the outer side wall of the carrier (2) extends to form positioning columns (21) for fixing and sleeving the coil group, the positioning columns (21) are abutted to four inner corners of the first coil (41) and the second coil (42), and one side of the positioning columns (21) abutted to the coil group is arranged in an arc shape; and a clamping groove (11) for clamping and embedding the magnet group is formed in the side wall of the base (1).

4. An optical unit with jitter correction as claimed in claim 3, wherein: each of the first magnet (51) and the second magnet (52) is a multi-pole magnet or one of two bipolar magnets.

5. An optical unit with jitter correction as claimed in claim 4, wherein: the magnetic induction coil is characterized by further comprising an iron core (6) which is fixed on the outer side wall of the carrier (2) and arranged in the second coil (42).

6. A camera device, characterized by: an optical unit having a shake correction function according to any one of claims 1 to 5.

7. An electronic device, characterized by: a camera device according to claim 6.