CN217425899U - Optical component driving device, imaging module, and electronic apparatus - Google Patents

Abstract

The utility model relates to an optical component drive arrangement, camera module and electronic equipment, optical component drive arrangement includes and decides the unit, a power component for installing optical component move the unit and drive and move the unit and move in the direction of predetermineeing, power component includes the magnet group that has two magnetite and is located the coil between two magnetite, one of magnet group and coil is installed on deciding the unit, another installs on moving the unit, two magnetite and coil three arrange along predetermineeing the direction, wherein, the annular surface perpendicular to of coil predetermineeing the direction, the magnetic pole opposite direction of two magnetite, and the magnetic pole direction all is the same with predetermineeing the direction. Two opposite-magnetic-pole magnets are respectively arranged on two sides of the annular surface of the coil, when the coil is electrified, the magnetoelectric effect coil can generate a corresponding magnetic field, and the two magnets can respectively generate magnetic force in the same direction with the coil, so that the driving force of the optical component driving device is improved.

Description

Optical component driving device, imaging module, and electronic apparatus

Technical Field

The present disclosure relates to the field of electronic device imaging, and in particular, to an optical component driving device, an imaging module, and an electronic device.

Background

In the field of electronic device imaging, in order to improve imaging quality, an optical component in an imaging module is generally movable, for example, focusing, zooming or optical anti-shake is performed, for example, in order to achieve optical anti-shake characteristics, a common driving motor includes a coil and a magnet that are matched with each other, the arrangement direction of the coil and the magnet is generally perpendicular to a shake direction, and in order to improve driving force, in related art, the arrangement direction of the coil and the shake direction is changed into the same direction, for example, chinese patent application No. CN202121355552.6 discloses an optical device driving mechanism including a magnet and a coil that are matched with each other, and the arrangement direction of the coil is the same as the shake direction at this time, but in practice, it is found that the arrangement mode still has a situation that driving force is insufficient.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide an optical component driving device, an image pickup module, and an electronic apparatus to at least partially solve the problems in the related art.

In order to achieve the above object, the present disclosure provides an optical component driving device, including deciding the unit, being used for installing optical component move the unit and drive move the power component that the unit moved on the direction of predetermineeing, power component includes the magnet group that has two magnetite and is located two coil between the magnetite, magnet group with one of coil is installed decide on the unit, and the other is installed move on the unit, two magnetite with the coil three is followed predetermine the direction and arranges, wherein, the toroidal surface perpendicular to of coil predetermine the direction, two the magnetic pole direction of magnetite is opposite, and the magnetic pole direction all with predetermine the direction the same.

Optionally, the power assembly further comprises a yoke disposed at an outer periphery of the magnet pack and the coil.

Optionally, the yoke extends at least partially in the preset direction and covers the magnet group and the coil. Optionally, the magnetic yoke is configured as a long cylinder structure with a rectangular cross section so as to be sleeved on the peripheries of the two magnets and the coil.

Optionally, the magnetic yoke comprises an elongated half-surrounding section with a U-shaped cross section and an elongated plate section detachably fastened to an open end of the half-surrounding section.

Optionally, the moving unit has a square cross section and is configured to move in a first direction and a second direction perpendicular to the first direction relative to the fixed unit, the power assembly includes two sets disposed on adjacent sides of the moving unit, and the magnet in each set of the power assembly is fixedly mounted on a side edge of the moving unit through a corresponding yoke.

Optionally, the coil is mounted on the fixed unit, and the magnet group is mounted on the moving unit.

Optionally, two ends of the coil extend out of an area between the two magnets, a clamping protrusion for mounting the coil is formed at a position of the fixed unit corresponding to the extending portion of the coil, and the clamping protrusion is provided with a groove for accommodating an end portion of the coil.

Optionally, the driving device further comprises a ball supported between the fixed unit and the movable unit, and at least one of the fixed unit and the movable unit is formed with a receiving groove for receiving the ball.

Optionally, the driving device further includes a circuit board and a position sensor mounted on the circuit board, wherein the circuit board and the coil are mounted on the fixed unit or the movable unit at the same time, and the position sensor is configured to detect a real-time position of the movable unit.

According to a second aspect of the present disclosure, there is provided a camera module including an optical member and the above-described optical member driving device.

According to a third aspect of the present disclosure, an electronic apparatus is provided, which includes the camera module described above.

Through above-mentioned technical scheme, be provided with two magnetite that the magnetic pole is opposite respectively in the both sides of the toroidal surface of coil, when the coil circular telegram, because magnetoelectric effect coil can produce corresponding magnetic field, two magnetite can produce the magnetic force of equidirectional with the coil respectively to promote optical component drive arrangement's drive power.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic view of a camera module according to the present disclosure;

2-3 are different angle exploded views of a camera module according to the present disclosure;

FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 1;

FIG. 5 is a schematic illustration of a first power assembly shown exemplary in accordance with the present disclosure;

FIG. 6 is a schematic illustration of a second power assembly shown exemplary in accordance with the present disclosure;

FIG. 7 is a side view of a second power assembly shown exemplary in accordance with the present disclosure;

FIG. 8 is a schematic illustration of a third power assembly shown exemplary according to the present disclosure;

FIG. 9 is a side view of a third power assembly shown exemplary in accordance with the present disclosure;

FIG. 10 is a schematic illustration of a fourth power assembly shown exemplary according to the present disclosure;

FIG. 11 is a side view of a fourth power assembly shown exemplary in accordance with the present disclosure;

FIG. 12 is a schematic illustration of a fifth power assembly shown exemplary according to the present disclosure;

FIG. 13 is a side view of a fifth power assembly shown exemplary according to the present disclosure;

FIG. 14 is a power comparison diagram of a power assembly including two magnets and one magnet;

FIG. 15 is a magnetic field profile when the power assembly does not include a yoke;

FIG. 16 is a magnetic field profile when the power assembly includes a magnetic yoke;

FIG. 17 is a schematic view of a camera module according to the present disclosure;

FIG. 18 is a schematic diagram of an electronic device illustratively shown in accordance with the present disclosure.

Description of the reference numerals

10-a magnet; 20-a coil; 30-a magnetic yoke; 31-a semi-enclosed section; 32-long plate sections; 40-fixed unit; 50-a moving unit; 60-a ball bearing; 70-accommodating grooves; 80-position sensor; 90-clamping the bulge; 91-a groove; 100-circuit meal; 110-an optical component; 120-organism.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise stated, the terms "inner" and "outer" are used to define the relative components based on their own profile, for example: the yoke disposed at the "outer" periphery of the magnet groups and the coils means that the magnet groups and the coils are disposed inside the accommodating space formed by the yoke.

Referring to fig. 1 to 5, the present disclosure provides an optical component driving apparatus including a stationary unit 40, a moving unit 50 for mounting an optical component, and a power assembly driving the moving unit 50 to move in a predetermined direction, the power assembly including a magnet group having two magnets 10 and a coil 20 located between the two magnets 10, one of the magnet group and the coil 20 being mounted on the stationary unit 40, the other being mounted on the moving unit 50, the two magnets 10 and the coil 20 being arranged in the predetermined direction, wherein an annular surface of the coil 20 is perpendicular to the predetermined direction, magnetic pole directions of the two magnets 10 are opposite, and the magnetic pole directions are the same as the predetermined direction.

Here, it should be explained that the preset direction may be an anti-shake direction of the optical component, such as the directions of arrow X and arrow Y in fig. 2, and may also be an in-focus direction of the optical component, which is not limited by the present disclosure, and only the anti-shake direction (i.e., shake compensation direction) is explained as an example below. The annular surface of the coil 20 refers to a cross section of a ring surrounded by a plurality of turns of the wire, and the annular surface is perpendicular to the preset direction, so that the direction of the magnetic pole generated according to ampere's rule after the coil is electrified is the same as the preset direction. The two magnets are arranged in the predetermined direction such that the magnetic pole directions of the two magnets are opposite to each other.

By using the above technical solution, two magnets 10 with opposite magnetic poles are respectively arranged on two sides of the annular surface of the coil 20, when the coil 20 is energized, because the electromagnetic effect coil 20 can generate a corresponding magnetic field, the directions of the magnetic forces acting on the coil 20 by the two magnets 10 are the same, thereby improving the driving force of the optical component driving device. Specifically, reference may be made to fig. 14, in which the prior art refers to a power assembly provided with only one magnet 10, and the improvement refers to a power assembly provided with two magnets 10 of the present disclosure, the numerical value of the ordinate does not limit the specific driving force, but represents that the driving force is larger and larger along the direction in which the numerical value increases, the abscissa represents the distance between the coil 20 and the two magnets 10, and the numerical value does not refer to the specific distance but represents a tendency to approach and depart. As can be seen from the figure, in the prior art, when the magnets 10 and the coil 20 move relatively, since only one magnet 10 is provided, the distance between the two magnets can only be gradually increased or decreased, and the magnitude of the magnetic force between the two magnets is positively correlated with the distance, which results in insufficient driving force when the distance is long. According to the technical scheme of the disclosure, when the coil 20 is far away from one magnet 10, the coil is also close to the other magnet 10, so that the power assembly always has strong driving force no matter the position relation between the magnet group and the coil 20.

Referring to fig. 6 to 13, in order to further improve the utilization rate of the magnetic field of the magnet 10, thereby increasing the driving force of the power assembly, in some embodiments, the power assembly may further include a yoke 30 disposed at the outer periphery of the magnet group and the coil 20. Referring to fig. 15 to 16, taking the magnetic yoke 30 having a rectangular cross-section and a long cylindrical structure as an example, when the power assembly includes the magnetic yoke 30, the magnetic lines of induction of the magnetic field are more compact and dense, and the magnetic field utilization rate is higher, so that the driving device can provide a larger driving force.

The present disclosure does not limit the specific structure of the yoke 30, and in order to increase the magnetic effect of the yoke 30, in some embodiments, the yoke 30 may extend at least partially in a predetermined direction and cover the magnet assembly and the coil 20. Several related embodiments are described below:

the first embodiment: referring to fig. 2 to 3 and 6 to 7, the yoke 30 may be configured as a long cylindrical structure having a rectangular cross section so as to fit around the outer peripheries of the two magnets 10 and the coil 20. Further, to facilitate the mounting of the magnet 10, the coil 20, and the yoke 30, in some embodiments, the yoke 30 may include an elongated half-enclosure section 31 having a U-shaped cross section and an elongated plate section 32 detachably fitted to an open end of the half-enclosure section. When in use, the coil 20 and the magnet 10 can be installed in the strip semi-surrounding section 31, and then the strip plate section 32 is fastened to the opening of the strip semi-surrounding section 31. In addition, in some other embodiments, the strip yoke 30 having a rectangular cross section may be detachably composed of four strip plate-shaped yokes, which is not limited by the present disclosure.

Second embodiment: referring to fig. 10 to 11, the yoke 30 may be configured as an elongated semi-surrounding structure having a U-shaped cross section, and the magnet 10 and the coil 20 are placed in a receiving space formed by the semi-surrounding structure.

Further, referring to fig. 2 and 3, in order to realize that the camera module to be described below can realize a two-directional anti-shake function, in some embodiments, the moving unit 50 may have a square cross-section and be configured to be movable in a first direction and a second direction perpendicular to the first direction with respect to the fixed unit 40, and the power assembly may include two sets disposed on adjacent sides of the moving unit 50, and the magnet 10 in each set may be fixedly mounted on a side of the moving unit 50 by a corresponding yoke 30.

The third embodiment: referring to fig. 12 to 13, the yoke 30 may include two strip segments, and the two strip segments may be respectively disposed at both ends of the magnet 10 in a direction perpendicular to the predetermined direction and parallel to each other, and the coil 20 and the magnet 10 are located in a space between the two strip segments. In addition, in other embodiments, one long strip segment may be disposed only at a position of one side of the magnet assembly and the coil 20 parallel to the preset direction, which is not limited by the present disclosure.

Of course, the arrangement of the yoke 30 is not limited to the above (the yoke 30 is arranged at least at a position on one side surface of the magnet group and the coil 20 parallel to the predetermined direction), for example, in other embodiments, referring to fig. 8 to 9, the yoke 30 may include two long strip segments as in the third embodiment, but in this embodiment, the two long strip segments are respectively attached to the end surfaces of the two magnets 10 away from the coil 20 along the predetermined direction.

In order to enable the power assembly of the coil 20 and the magnet 10 to drive the moving unit 50 to move in a predetermined direction relative to the stationary unit 40, referring to fig. 2 to 3, in some embodiments, the coil 20 may be mounted on the stationary unit 40 and the magnet group may be mounted on the moving unit 50. In operation, the coil 20 is energized to generate a magnetic force with the magnet assembly, and the magnet assembly mounted on the movable unit 50 can drive the movable unit 50 to move due to the interaction of the magnetic force because the coil 20 is fixed on the fixed unit 40. In addition, in some other embodiments, the coil 20 may be mounted on the stator unit 40, and the magnet group may be mounted on the stator unit 40, which is not limited in the present disclosure.

Further, in order to fix the coil 20 to the stationary unit 40, referring to fig. 2 to 3, in some embodiments, both ends of the coil 20 may protrude out of an area between the two magnets 10, a catching protrusion 90 for mounting the coil 20 is formed at a position corresponding to the protruding portion of the coil 20 of the stationary unit 40, and the catching protrusion 90 has a groove 91 for receiving an end of the coil 20. In use, the coil 20 may be inserted into the recess 91, and the recess 91 is configured to match the size of the coil 20 to prevent the coil 20 from falling out. In addition, in some other embodiments, the coil 20 may be detachably mounted on the stator unit 40 by bolts and nuts, which are not limited by the present disclosure.

Referring to fig. 2 to 3, in order to provide guidance and support for the movement of the moving unit 50 relative to the fixed unit 40, in some embodiments, the driving apparatus may further include a ball 60 for supporting between the unit cell 40 and the moving unit 50, and at least one of the unit cell 40 and the moving unit 50 is formed with a receiving groove 70 for receiving the ball 60. In the embodiment of the present disclosure, the receiving groove 70 for receiving the ball 60 may be formed only in the fixed unit 40, and in other embodiments, the receiving groove 70 for receiving the ball 60 may be formed in each of the fixed unit 40 and the movable unit 50. In addition, in other embodiments, the ball 60 may be replaced by a guide such as a sliding shaft, which is not limited in this disclosure.

The number of the balls 60 is not limited in the present disclosure, for example, in the embodiment of the present disclosure, three balls 60 are provided, which are respectively located at the positions close to the edges of the contact surfaces of the fixed unit 40 and the movable unit 50. Further, in other embodiments, the number of balls 60 may be four.

In order to be able to detect the moving position of the moving unit 50 in real time to be able to adjust the movement of the moving unit 50 in real time to realize closed-loop control, referring to fig. 2-3, in some embodiments, the driving apparatus may further include a circuit board 100 and a position sensor 80 mounted on the circuit board 100, wherein the circuit board 100 and the coil 20 are simultaneously mounted on the fixed unit 40 or the moving unit 50, and the position sensor 80 is used to detect the real-time position of the moving unit 50. The present disclosure does not limit the type and number of the position sensors 80, for example, in the embodiment of the present disclosure, the number of the position sensors 80 may be two to improve the accuracy of the position detection. Here, in the embodiment of the present disclosure, the circuit board 100 and the coil 20 may be fixed to the fixing unit 40 at the same time by the above-described catching protrusion 90.

In the embodiment of the present disclosure, the position sensor 80 may be a hall sensor, and the principle thereof is that the intensity of different magnetic fields is detected and fed back to a voltage signal, and then the system determines the specific position of the moving unit 50 according to the obtained voltage, and the specific magnetic field strength corresponding to the position is calibrated through experiments before the product is used, that is, the specific position corresponding to different magnetic field strengths is obtained through experiments and compiled in the system.

According to a second aspect of the present disclosure, referring to fig. 17, there is provided a camera module including an optical component and the above optical component driving apparatus, which has all the advantages of the above optical component driving apparatus, and will not be described herein again.

It should be noted that the optical component is not limited in particular in the present disclosure, and in some embodiments, the optical component may be a lens. Furthermore, in other embodiments, the optical component may be a light-sensing chip.

According to a third aspect of the present disclosure, referring to fig. 18, an electronic device is provided, which includes the above-mentioned camera module, and has all the advantages of the above-mentioned camera module, and details are not repeated here.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (12)

1. The utility model provides an optical component drive arrangement, is used for installing optical component move unit (50) and drive including deciding unit (40), be used for moving unit (50) the power component that moves in the direction of predetermineeing, its characterized in that, power component is including the magnet group that has two magnetite (10) and be located two coil (20) between magnetite (10), magnet group with one of coil (20) is installed decide on unit (40), the other is installed move on unit (50), two magnetite (10) with coil (20) three is followed predetermine the direction and arrange, wherein, the annular face perpendicular to of coil (20) predetermine the direction, two the magnetic pole opposite direction of magnetite (10), and the magnetic pole direction all with predetermine the direction the same.

2. The drive of claim 1, wherein the power assembly further comprises a yoke (30) arranged at the periphery of the magnet assembly and the coil (20).

3. The drive device according to claim 2, characterized in that the yoke (30) extends at least partially in the preset direction and covers the set of magnets and the coil (20).

4. The drive device according to claim 3, wherein the yoke (30) is configured as a long cylindrical structure having a rectangular cross section so as to fit around the outer peripheries of the two magnets (10) and the coil (20).

5. A drive arrangement according to claim 4, characterized in that the yoke (30) comprises an elongated semi-enclosing section (31) having a U-shaped cross-section and an elongated plate section (32) detachably snap-fitted at the open end of the semi-enclosing section.

6. The drive device according to claim 4, wherein the moving unit (50) has a square cross-section and is configured to move in a first direction and a second direction perpendicular to the first direction with respect to the stationary unit (40), the power assemblies comprise two sets disposed on adjacent sides of the moving unit (50), and the magnets (10) in each set of power assemblies are fixedly mounted on the sides of the moving unit (50) by means of corresponding yokes (30).

7. The drive arrangement according to claim 1, characterized in that the coil (20) is mounted on the stationary unit (40) and the magnet assembly is mounted on the movable unit (50).

8. The driving apparatus according to claim 7, wherein both ends of the coil (20) are protruded from a region between the two magnets (10), and a catching protrusion (90) for mounting the coil (20) is formed at a position of the fixing unit (40) corresponding to the protruded portion of the coil (20), the catching protrusion (90) having a groove (91) for receiving the end of the coil (20).

9. The drive device according to claim 1, further comprising a ball (60) for supporting between the stationary unit (40) and the movable unit (50), at least one of the stationary unit (40) and the movable unit (50) being formed with a receiving groove (70) for receiving the ball (60).

10. The driving apparatus according to claim 1, further comprising a circuit board (100) and a position sensor (80) mounted on the circuit board (100), wherein the circuit board (100) and the coil (20) are mounted on the stationary unit (40) or the movable unit (50) at the same time, and the position sensor (80) is used for detecting a real-time position of the movable unit (50).

11. A camera module, characterized in that it comprises an optical component (110) and an optical component driving device according to any one of claims 1-10.

12. An electronic device characterized by comprising the camera module according to claim 11.

Images