CN114173038A

CN114173038A - Drive assembly, camera module and electronic equipment

Info

Publication number: CN114173038A
Application number: CN202111448302.1A
Authority: CN
Inventors: 李亚轩
Original assignee: New Shicoh Motor Co Ltd
Current assignee: New Shicoh Motor Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-03-11

Abstract

The invention provides a driving assembly, a camera module and electronic equipment, wherein the driving assembly comprises a base, a movable frame and a carrier, the outer side wall of the carrier and the inner side wall of the movable frame are arranged in a profiling mode, at least three magnets are distributed on the inner side wall of the movable frame, the magnets are arranged around the carrier, at least two winding coils are fixedly arranged on the outer side wall of the carrier, the two winding coils are oppositely arranged on the carrier, the winding coils and the magnets are arranged in parallel and correspondingly, the winding coils and the magnets are arranged in a staggered mode, a printed coil is arranged on the base, the printed coil is arranged facing the magnets, and the axis of the printed coil is perpendicular to the axis of the winding coils. According to the invention, two magnets in the three magnets which are oppositely arranged and the corresponding winding coils are arranged in a staggered manner, so that one magnet in the two magnets can be used as a deflection magnet for printing the coils, the other magnet in the three magnets is used as the other deflection magnet for printing the coils, and the anti-shake function and the automatic focusing function are realized through the three magnets.

Description

Drive assembly, camera module and electronic equipment

Technical Field

The invention relates to the technical field of voice coil motors, in particular to a driving assembly, a camera module and electronic equipment.

Background

With the rapid development of the camera industry, products equipped with cameras are more and more popular, including mobile phone cameras, IPAD cameras and the like, and become essential equipment in the life of people.

In a process of photographing using a product equipped with a camera, an auto-focus function of photographing is generally performed by a voice coil driver module (VCM), through which a position of a lens can be adjusted to present a clear image. The voice coil motor has the characteristics of high frequency response and high precision. The main principle is that in a permanent magnetic field, the direct current of a coil in a motor is changed to drive a carrier and a lens fixed on the carrier to move axially, so that the focusing function is realized.

Among the prior art, the response magnetite with the anti-shake deflection magnetite need be divided and establish two sets ofly, just around setting up at the carrier, on the carrier equally need correspond with the anti-shake deflection magnetite according to the response magnetite and set up four group's coiling for inner space occupies too big, is unfavorable for product miniaturization and reduce cost.

Disclosure of Invention

Accordingly, the present invention is directed to a driving assembly, a camera module and an electronic device, which at least solve the above-mentioned deficiencies of the prior art.

The invention provides a driving assembly, which comprises a base, a movable frame arranged on the base and a carrier movably arranged on the movable frame, wherein the outer side wall of the carrier and the inner side wall of the movable frame are arranged in a copying manner, at least three magnets are distributed on the inner side wall of the movable frame, the magnets are arranged around the carrier, at least two wound coils are fixedly arranged on the outer side wall of the carrier, the two wound coils are oppositely arranged on the carrier, the wound coils and the magnets are arranged in parallel and correspondingly, the wound coils and the magnets are arranged in a staggered manner, printed coils are arranged on the base, the printed coils are arranged towards the magnets, and the axes of the printed coils are perpendicular to the axes of the wound coils.

In addition, according to the driving assembly proposed by the present invention, the following additional technical features are provided:

furthermore, the driving assembly further comprises an elastic element connected with the carrier and the movable frame, the elastic element is connected with the winding coil, connecting portions are arranged on four corners of the elastic element, protruding portions corresponding to the connecting portions are arranged on the four corners of the base, and suspension wires are arranged between the protruding portions and the connecting portions.

Furthermore, elastic element includes the last shell fragment that two symmetries set up, two go up the shell fragment branch and locate movable frame's relative both sides, it is including locating to go up the shell fragment outer installation department on the movable frame, locate interior installation department and connection on the carrier outer installation department with the elastic component of outer installation department, connecting portion locate the corner position of outer installation department, the elastic component is the continuous bending and spirals the setting.

Furthermore, a winding coil is arranged on the carrier and is respectively connected with the inner mounting part and the winding coil.

Furthermore, the elastic element further comprises a lower elastic sheet which corresponds to the upper elastic sheet, the lower elastic sheet comprises an installation outer frame, an installation inner ring and an elastic part which is connected with the installation outer frame and the installation inner ring, the installation outer frame is fixed at the bottom of the movable frame, the installation inner ring is fixed at the bottom of the carrier, and the elastic part is continuously bent and spirally arranged.

Furthermore, a limiting part is embedded in the movable frame and used for limiting the magnet, a through hole is formed in the middle of the carrier and used for installing the lens, and a limiting part is embedded in the movable frame and used for limiting the magnet.

Furthermore, the driving assembly further comprises an anti-shake assembly, the anti-shake assembly comprises an FPCB plate embedded on the base, and the printed coils and connecting wires which are arranged on the surface of the FPCB plate, wherein the printed coils and the connecting wires are respectively positioned on two sides of the FPCB plate and are respectively electrically connected with the FPCB plate;

the connecting wire part is embedded in the base, one end of the connecting wire is exposed from the upper surface of the base to form a bonding pad and the FPCB plate is welded, and the other end of the connecting wire extends out of the lower surface of the base to form a pin which is communicated with an external power supply, so that the FPCB plate is electrified.

Furthermore, the anti-shake component further comprises a Hall element, a groove is dug in the lower surface of the base, part of the connecting wire is exposed in the groove, and the Hall element is arranged in the groove and is electrically connected with the exposed part of the connecting wire.

The invention also provides a camera module, which comprises a lens, an imaging sensor and the driving assembly;

the imaging sensor is arranged on one side of the base, which is far away from the lens, and the imaging sensor and the lens are oppositely arranged on an optical axis path.

The invention further provides electronic equipment comprising the camera module.

Compared with the prior art, the invention has the beneficial effects that: through setting up three magnetite and two coiling, and with the magnetite of two relative settings in the three magnetite and the setting of the coiling height straggly of correspondence, can make in two magnetite a magnetite can regard as the deflection magnetite of printing coil, and another one magnetite can regard as another deflection magnetite of printing coil in the three magnetite, and then realize anti-shake function and auto focus function through three magnetite, reduce drive assembly's whole volume on the one hand, be favorable to the miniaturization of product, on the other hand can also save manufacturing cost.

Drawings

FIG. 1 is an exploded view of a drive assembly according to a first embodiment of the present invention;

FIG. 2 is a partially exploded view of the drive assembly (without the cover plate) in a first embodiment of the present invention;

FIG. 3 is a side view of the movable frame and the carrier and base in a first embodiment of the present invention;

FIG. 4 is a schematic view of the movable frame and the base of the first embodiment of the present invention;

FIG. 5 is a top view of the upper spring plate according to the first embodiment of the present invention;

FIG. 6 is a top view of the lower resilient plate according to the first embodiment of the present invention;

FIG. 7 is an enlarged view of portion A of FIG. 4;

FIG. 8 is a schematic view showing a relationship between a magnet and an anti-shake assembly according to a first embodiment of the present invention;

FIG. 9 is a schematic view illustrating an assembly of the base and the anti-shake assembly according to the first embodiment of the present invention;

fig. 10 is a top view of a lower elastic sheet according to a second embodiment of the invention.

Description of the main element symbols:

the following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the present invention, an X direction, a Y direction and a Z direction form a virtual coordinate system, the Z direction is an axial direction of the base 100, the X direction and the Y direction are perpendicular to each other and form a horizontal plane, the horizontal plane is perpendicular to an axial direction of the base 100, wherein the X direction is a transverse direction of the horizontal plane, and the Y direction is a longitudinal direction of the horizontal plane.

Example one

In this embodiment, a drive assembly is provided for solve prior art, the response magnetite with the anti-shake deflection magnetite need be divided and are established two sets ofly, just around setting up at the carrier, on the carrier equally need correspond with the anti-shake deflection magnetite according to the response magnetite and set up four group's coiling for inner space occupies too big, is unfavorable for product miniaturization and reduce cost.

Referring to fig. 1 to 4, which illustrate a driving assembly according to a first embodiment of the present invention, in a three-dimensional XYZ rectangular coordinate system, the driving assembly base 100, a movable frame 200 disposed on the base 100, and a carrier 300 movably disposed on the movable frame 200, an outer sidewall of the carrier 300 and an inner sidewall of the movable frame 200 are disposed in a profiling manner, three magnets 210 are disposed on the inner sidewall of the movable frame 200, the magnets 210 are disposed around the carrier 300, two wound coils 310 are fixedly disposed on the outer sidewall of the carrier 300, the two wound coils 310 are disposed on the carrier 300 in an opposing manner, the wound coils 310 are parallel to and corresponding to the magnets 210, the wound coils 310 and the magnets 210 are disposed in a staggered manner, a printed coil 110 is disposed on the base 100, and the printed coil 110 is disposed facing the magnets 210, and the axis of the printed coil 110 is perpendicular to the axis of the wound coil 310.

It should be noted that, the carrier 300 of the present invention can be loaded with a structure (e.g. a lens) to be driven, and the magnetic poles N of the magnets 210 along the length direction are respectively disposed at the upper left corner and the lower right corner of the magnets 210, and the magnetic poles S are respectively disposed at the lower left corner and the upper right corner of the magnets 210, the base 100 of the present invention is provided with the hall element 150, the three magnets 210 of the present invention are divided into a first magnet 211, a second magnet 212 and a third magnet 213, wherein the first magnet 211 and the second magnet 212 are oppositely disposed and respectively disposed corresponding to the two wound coils 310, the printed coil 110 is disposed below the first magnet 211 and the third magnet 213, when a certain amount of current is applied to the printed coil 110 in the X direction, the printed coil 110 interacts with the first magnet 211 above the printed coil 110 to generate an electromagnetic force, and the lens is driven to move in the X direction according to the electromagnetic force generated by the left-hand rule, when a certain amount of current is applied to the Y-direction printed coil 110, the printed coil 110 interacts with the third magnet 213 on the printed coil 110 to generate an electromagnetic force, the lens is driven to move in the Y-direction by the electromagnetic force generated according to the left-hand rule, and the hall element 150 can sense the offset in the X-direction and/or the Y-direction, so that the position compensation of the jitter is realized, and the anti-shake performance is enhanced; when a certain amount of current is applied to the wound coil 310, the wound coil 310 interacts with the first magnet 211 and the second magnet 212 to generate electromagnetic force, and the electromagnetic force generated according to the left-hand rule drives the lens to move and adjust along the Z direction (optical axis).

Referring to fig. 4 to 7, the driving assembly further includes an elastic element connecting the carrier 300 and the movable frame 200, the elastic element is connected to the winding coil 310, connecting portions are disposed on four corners of the elastic element, protruding portions corresponding to the connecting portions are disposed on four corners of the base 100, and a suspension wire is disposed between the protruding portions and the connecting portions.

The suspension wires are arranged to transmit an external power to the printed coil 110 through the suspension wires, and the printed coil 110 with dots is matched with the first magnet 211 and the second magnet 212, so that the lens mounted on the carrier 300 can be moved and adjusted in the Z direction (optical axis).

Specifically, elastic element includes two symmetry settings last shell fragment 220, two go up the shell fragment 220 branch and locate movable frame 200's relative both sides, go up the shell fragment 220 including locating outer installation department 221 on movable frame 200, locate interior installation department 222 and the connection on the carrier 300 outer installation department 221 with the elastic component 223 of outer installation department 221, connecting portion locate the corner position of outer installation department 221, elastic component 223 is the continuous bending and spirals the setting.

As can be appreciated, due to the arrangement of the suspension wires, the traditional upper spring plate 220 is arranged into a two-symmetrical spring plate structure, so that on one hand, the position of the printed coil 110 can be effectively avoided, and on the other hand, the production cost can be saved; the outer mounting part 221 and the inner mounting part 222 are respectively provided with a limiting hole, the movable frame 200 and the carrier 300 are respectively provided with a corresponding limiting column, when the elastic sheet 220 is mounted, the outer mounting part 221 and the inner mounting part 222 are fixed on the movable frame 200 and the carrier 300 through the limiting holes, the position precision and the assembly precision of the whole device are further improved, and the product quality is improved; the elastic member 223 is arranged, so that the carrier 300 arranged in the movable frame 200 can move and adjust in the Z direction (optical axis) relative to the movable frame 200, and meanwhile, the elastic member 223 can also have a certain elastic effect, so that the moving accuracy is further improved; the continuous bending and coiling of the elastic member 223 can further enhance the toughness and the bearing capacity of the elastic member 223, and prevent the elastic member 223 from being broken in the moving process of the carrier 300.

Further, a winding coil 240 is disposed on the carrier 300, and the winding coil 240 is connected to the inner mounting portion 222 and the winding coil 310, respectively.

It can be understood that the winding coil 240 can introduce the current transmitted to the upper spring 220 through the suspension wire to the winding coil 310, so that the winding coil 310 interacts with the first magnet 211 and the second magnet 212 to generate the electromagnetic force.

In this application, the elastic element further includes with last shell fragment 220 corresponds lower shell fragment 230 that sets up, lower shell fragment 230 is including installation frame 231, installation inner ring 232 and connection installation frame 231 with the elastic component 233 of installation inner ring 232, installation frame 231 is fixed the bottom of movable frame 200, installation inner ring 232 is fixed the bottom of carrier 300, elastic component 233 is the continuous bending and spirals the setting.

It should be noted that, in the present application, fixing holes are provided on the mounting outer frame 231 and the mounting inner ring 232, and corresponding fixing posts are provided on the movable frame 200 and the carrier 300, when the lower elastic sheet 230 is mounted, the mounting outer frame 231 and the mounting inner ring 232 are fixed on the movable frame 200 and the carrier 300 through the fixing holes, so as to further improve the position accuracy and the assembly accuracy of the whole device, and improve the quality of the product; the elastic part 233 is also arranged to enable the carrier 300 arranged in the movable frame 200 to move and adjust in the Z direction (optical axis) relative to the movable frame 200, and meanwhile, the elastic part 223 can also have a certain elastic function to further improve the moving precision; the elastic part 233 is continuously bent and coiled, so that the toughness and the bearing capacity of the elastic part 223 can be further enhanced, and the elastic part 223 is prevented from being broken in the moving process of the carrier 300.

Further, a limiting member 250 is embedded in the movable frame 200, the limiting member 250 is used for limiting the magnet 210, a through hole 320 is formed in the middle of the carrier 300, and the through hole 320 is used for installing a lens.

It can be understood that, the position of the movable frame 200 can be limited in the Z direction (optical axis) by the limiting member 250, so as to avoid the problem of inaccurate focusing caused by the movable frame 200 being driven by the upper elastic sheet 220 and the lower elastic sheet 230 when the carrier 300 moves in the Z direction (optical axis).

Referring to fig. 8 to 9, the driving assembly further includes an anti-shake assembly, the anti-shake assembly includes an FPCB plate 120 embedded on the base 100, the printed coil 110 and a connection line 130 disposed on the surface of the FPCB plate 120, the printed coil 110 and the connection line 130 are respectively located at two sides of the FPCB plate 120 and are respectively electrically connected to the FPCB plate 120; specifically, the printed coil 110 is disposed facing the first magnet 211 and the third magnet 213, an axis of the printed coil 110 is perpendicular to an axial direction of the winding coil 310, and the printed coil 110 is disposed along the X direction and the Y direction, so that the printed coil 110 can interact with the first magnet 211 and the third magnet 213 disposed above the printed coil after being energized to generate an electromagnetic force to further realize the movement of the lens in the X direction and the Y direction.

It should be noted that the printed coil 110 and the wound coil 310 share the first magnet 211, and the first magnet 211 is disposed in the winding direction of the wound coil 310 and the printed coil 110, and the magnetic poles of the first magnet 211 are distributed, so as to generate driving forces along the X direction and the Y direction, and further reduce the internal occupied space while the carrier 300 moves parallel to the axial direction thereof.

In this application, the connecting wire 130 is partially embedded in the base 100, one end of the connecting wire 130 is exposed from the upper surface of the base 100 to form a bonding pad and the FPCB plate 120 is welded, and the other end of the connecting wire 130 is extended from the lower surface of the base 100 to form a pin 140 which is communicated with an external power supply, so that the FPCB plate 120 is electrified.

Further, the anti-shake assembly further comprises a hall element 150, a groove is dug in the lower surface of the base 100, part of the connecting wire 130 is exposed in the groove, and the hall element 150 is arranged in the groove and electrically connected with the exposed part of the connecting wire 130.

It can be understood that an IC module is disposed in the FPCB board 120, and the IC module directly senses the magnetic field change of the magnet 210 and feeds back the offset of the magnet 210 in the X direction and/or the Y direction, and then the printed coil 110 is energized to generate a driving force in interaction with the corresponding magnet 210, so as to drive the carrier 300 to move along the X direction and/or the Y direction, thereby realizing the position compensation of the jitter and enhancing the anti-shake performance.

Example two

Referring to fig. 10, a driving assembly according to a second embodiment of the present invention is described, in which the driving assembly of the present embodiment is different from the driving assembly of the first embodiment in that: the elastic element comprises an upper elastic sheet 220 and a lower elastic sheet 230, and the upper elastic sheet 220 and the lower elastic sheet 230 are both arranged into two symmetrical elastic sheet structures. It can be understood that the design is aimed at the lower spring plate 230 being able to avoid more space and also saving the production cost.

The driving assembly provided in this embodiment has the same implementation principle and the same technical effects as those of the first embodiment, and for the sake of brief description, reference may be made to corresponding contents in the first embodiment without reference to the second embodiment.

EXAMPLE III

Example four

In summary, in the driving assembly, the camera module and the electronic device in the above embodiments of the invention, by providing the three magnets and the two winding coils, and arranging the two magnets of the three magnets, which are oppositely arranged, and the winding coils corresponding to the two magnets in a staggered manner, one of the two magnets can be used as a deflection magnet for printing the coils, and the other magnet of the three magnets can be used as another deflection magnet for printing the coils, so that the anti-shake function and the auto-focusing function are realized by the three magnets, on one hand, the overall size of the driving assembly is reduced, which is beneficial to the miniaturization of the product, and on the other hand, the production cost can be saved.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a drive assembly, a serial communication port, include the base, locate movable frame and mobile setting on the base in carrier on the movable frame, the carrier lateral wall with movable frame inside wall profile modeling sets up, three magnetite has been laid at least on movable frame's the inside wall, the magnetite encircles the carrier sets up, two coiling sets firmly at least on the lateral wall of carrier, two coiling is in relative setting on the carrier, coiling with parallel and corresponding setting of magnetite, just coiling with the magnetite setting of staggering, be equipped with the printing coil on the base, the printing coil towards the magnetite setting, just the axis of printing coil with the axis looks perpendicular setting of coiling.

2. The driving assembly according to claim 1, further comprising an elastic element connecting the carrier and the movable frame, wherein the elastic element is connected to the wound coil, connecting portions are disposed on four corners of the elastic element, protruding portions corresponding to the connecting portions are disposed on four corners of the base, and a suspension wire is disposed between the protruding portions and the connecting portions.

3. The driving assembly according to claim 2, wherein the elastic element includes two upper elastic pieces symmetrically disposed on two opposite sides of the movable frame, the upper elastic pieces include an outer mounting portion disposed on the movable frame, an inner mounting portion disposed on the carrier, and an elastic member connecting the outer mounting portion and the outer mounting portion, the connecting portion is disposed at a corner of the outer mounting portion, and the elastic member is continuously bent and spirally disposed.

4. The drive assembly of claim 2, wherein a winding coil is disposed on the carrier and is connected to the inner mount and the wound coil, respectively.

5. The driving assembly according to claim 2, wherein the elastic element further comprises a lower elastic sheet disposed corresponding to the upper elastic sheet, the lower elastic sheet comprises an outer mounting frame, an inner mounting ring and an elastic portion connecting the outer mounting frame and the inner mounting ring, the outer mounting frame is fixed to the bottom of the movable frame, the inner mounting ring is fixed to the bottom of the carrier, and the elastic portion is continuously bent and spirally disposed.

6. The driving assembly according to claim 1, wherein a stopper is embedded in the movable frame, the stopper is used for limiting the magnet, and a through hole is formed in a middle portion of the carrier, and is used for installing a lens.

7. The driving assembly according to claim 1, further comprising an anti-shake assembly, wherein the anti-shake assembly comprises an FPCB plate embedded on the base, the printed coils and connecting wires disposed on a surface of the FPCB plate, and the printed coils and the connecting wires are respectively located at two sides of the FPCB plate and are respectively electrically connected to the FPCB plate;

8. The driving assembly according to claim 7, wherein the anti-shake assembly further comprises a hall element, a groove is dug in the lower surface of the base, a part of the connecting wire is exposed in the groove, and the hall element is disposed in the groove and electrically connected with the exposed part of the connecting wire.

9. A camera module, comprising a lens, an imaging sensor, and the driving assembly of any one of claims 1 to 8;

10. An electronic device, comprising the camera module of claim 9.