CN112630926A - Lens driving device, camera device and mobile terminal - Google Patents
Lens driving device, camera device and mobile terminal Download PDFInfo
- Publication number
- CN112630926A CN112630926A CN202011643596.9A CN202011643596A CN112630926A CN 112630926 A CN112630926 A CN 112630926A CN 202011643596 A CN202011643596 A CN 202011643596A CN 112630926 A CN112630926 A CN 112630926A
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- driving
- magnet
- flanging
- winding carrier
- coil
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The invention discloses a lens driving device, wherein a shell is coupled on a base; the frame is arranged in the shell; the periphery of the upper spring is fixed on the frame, and the inner ring surface is connected to the upper end surface of the winding carrier; four corners of the lower spring are fixed on the base, and the inner ring surface is fixedly connected to the lower end surface of the winding carrier; the driving coil is wound on the outer side of the winding carrier; the driving magnet group is bent, one folded edge of the driving magnet group is in a straight plate shape, the other folded edge of the driving magnet group is in a trapezoid shape, and three sides of the driving magnet group are in contact with the inner peripheral surface of the frame; the driving magnet groups are uniformly distributed on the outer side of the driving coil and are symmetrical about the central axis of the driving coil; the shell is provided with an iron shell flanging which is connected with and inserted into the notch on the opposite winding carrier; the flanging magnet is arranged on the inner side of the flanging of the iron shell. The invention also discloses a camera device with the lens driving device and a mobile terminal with the camera device. The invention improves the driving force of the motor and does not need to increase the volume of the driving mechanism.
Description
Technical Field
The present invention relates to the field of camera technologies, and in particular, to a lens driving device, a camera device, and a mobile terminal.
Background
The conventional motor is driven by electrifying a driving coil and then interacting with a driving magnet, and generating a certain magnetic force to drive a lens module (a winding carrier carrying a lens) to an ideal target position according to the left-hand fleming's rule so as to achieve the effect of focusing and shooting a clear picture. The existing mobile phone is often required to be miniaturized and thinned, so that the accommodating space of a motor mounted in the mobile phone is extremely limited, the problem of insufficient thrust exists, and the lens cannot reach the target stroke position easily. In order to solve the above problems, it is necessary to develop a motor having a large thrust and a long stroke on the basis of a limited space of the conventional motor. The invention is to increase the magnetic force of the magnetic field of the motor so that the thrust is greatly enhanced after a certain current is applied to the driving coil.
Disclosure of Invention
The invention provides a lens driving device, a camera device and a mobile terminal, which aim to solve the problem of insufficient motor thrust generated under the condition of limited accommodating space of the existing motor.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a lens driving device comprises a shell, a base, a winding carrier, a driving coil, a driving magnet group, an upper spring, a lower spring, a frame and a flanging magnet; the housing is coupled to the base; the frame is disposed within the housing; the periphery of the upper spring is fixed on the frame, and the inner ring surface of the upper spring is connected to the upper end surface of the winding carrier; four corners of the lower spring are fixed on the base, and the inner ring surface is fixedly connected to the lower end surface of the winding carrier; the driving coil is wound on the outer side of the winding carrier; the driving magnet group is bent, one folded edge of the driving magnet group is in a straight plate shape, the other folded edge of the driving magnet group is in a trapezoid shape, and three sides of the other folded edge of the driving magnet group are in contact with the inner peripheral surface of the frame; the driving magnet groups are uniformly distributed on the outer side of the driving coil and are symmetrical about the central axis of the driving coil; the shell is provided with an iron shell flanging which is connected with and inserted into the notch on the opposite winding carrier; the flanging magnet is arranged on the inner side of the flanging of the iron shell.
Optionally, the driving magnet group is formed by splicing a trapezoidal first driving magnet and a straight plate-shaped second driving magnet.
Optionally, the drive coil is wound on the winding carrier by injection molding.
Optionally, a round hole is formed in the center of the base, a raised dustproof ring is arranged on the inner side face of the round hole, and the dustproof ring is matched with the winding carrier.
Optionally, the flanging magnet is bonded to the inner side surface of the flanging of the iron shell through glue.
An image pickup apparatus comprising the lens driving apparatus of any one of the above.
A mobile terminal comprises the camera device.
Optionally, the mobile terminal is any one of a mobile phone, a notebook computer and a terminal carrying camera information.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the driving magnet group and the driving coil interact to generate a first group of driving force, the flanging magnet and the driving coil interact to generate a second group of driving force, and under the combined cooperation of the two groups of driving force, the motor thrust is greatly enhanced. The drive magnet group is bent to be suitable for a drive coil with a long-edge and short-edge polygonal structure, is convenient to mount, and can furthest promote the first group of drive force and furthest utilize the limited motor accommodating space.
Drawings
FIG. 1 is an exploded view of a lens driving device according to an embodiment of the present invention;
FIG. 2 is a perspective view of a lens driving device according to an embodiment of the present invention;
FIG. 3 is a layout view of a drive magnet, a drive coil, and a turnup magnet according to an embodiment of the present invention;
FIG. 4 is a block diagram of the lens driving apparatus of FIG. 2 with a housing removed;
FIG. 5 is a layout view of the lower spring and the winding carrier according to one embodiment of the present invention;
FIG. 6 is a layout view of the upper spring and the winding carrier according to one embodiment of the present invention;
FIG. 7 is a layout view of the drive magnets, the drive coils, and the turnup magnets according to the second embodiment of the present invention.
In the figure, 1-housing; 2-a base; 3-winding a wire carrier; 4-a drive coil; 5-driving the magnet group; 6-spring up; 7-lower spring; 8-a frame; 9-flanging the iron shell; 10-flanging magnet; 11-a first drive magnet; 12-second drive magnet.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
Referring to fig. 1 to 6, a lens driving apparatus includes a housing 1, a base 2, a winding carrier 3, a driving coil 4, a driving magnet group 5, an upper spring 6, a lower spring 7, a frame 8, and a turnup magnet 10; the shell 1 is coupled on the base 2; the frame 8 is arranged in the housing 1; the periphery of the upper spring 6 is fixed on the frame 8, and the inner ring surface is connected to the upper end surface of the winding carrier 3; four corners of the lower spring 7 are fixed on the base 2, and the inner ring surface is fixedly connected to the lower end surface of the winding carrier 3; the driving coil 4 is wound outside the winding carrier 3; the driving magnet group 5 is bent, one folded edge is in a straight plate shape, the other folded edge is in a trapezoid shape, and three sides of the other folded edge are in contact with the inner peripheral surface of the frame 8; the driving magnet groups 5 are uniformly distributed on the outer side of the driving coil 4 and are symmetrical about the central axis of the driving coil 4; the shell 1 is provided with an iron shell flanging 9 which is inserted and matched with the notch on the opposite winding carrier 3; the flanging magnet 10 is arranged on the inner side of the iron shell flanging 9.
In this embodiment, the driving magnet group 5 and the driving coil 4 interact with each other to generate a first group of driving forces, and the turned-up magnet 10 and the driving coil 4 interact with each other to generate a second group of driving forces. The iron shell flanging 9 has the function of being matched with the notches arranged on the opposite winding carriers 3 in an inserting manner, so that the winding carriers 3 are prevented from generating circumferential inclined torsion deviation in the direction perpendicular to the optical axis due to self thrust movement and bumping and shaking in a special environment in the process of driving towards the optical axis direction, namely certain negative influence on the imaging effect due to deviation from the given optical axis direction. To prevent this, a shell flange 9 is provided on the housing 1 to abut against an opposing recess provided in the wound carrier 3, providing a limited anti-twisting action against the excursion of the carrier movement. The invention is provided with an iron shell flanging 9, and the inner side surface of the iron shell flanging 9 is added with another group of magnets, namely a flanging magnet 10, a driving magnet group 5 and a driving coil 4 form a first group of driving mechanism, and the flanging magnet 10 and the driving coil 4 form a second group of driving mechanism. Under the combined action of the two groups of driving mechanisms, the motor thrust is greatly enhanced. And the second group of driving mechanisms improves the driving force by 30 percent at least on the basis of the first group of driving mechanisms.
Working principle of the lens driving device: when a current is applied to the driving coil 4, the electromagnetic force in the direction of the optical axis starts to act, and a restoring force in the direction opposite to the optical axis is applied after the spring wire is displaced in proportion by the elasticity of the upper spring 6 and the lower spring 7 (i.e., the spring wire is stretched). Therefore, the position of the bobbin 3, that is, the distance of forward movement is at a point where the electromagnetic force and the elastic force are balanced. Accordingly, the amount of forward movement of the coil carrier 3 can be determined based on the amount of current applied to the driving coil 4.
Driving principle of the optical axis direction lens module: the lens module is arranged on the winding carrier 3, the winding carrier 3 is clamped and fixed between the upper spring 6 and the lower spring 7, after current is introduced to the driving coil 4, electromagnetic force can be generated between the driving coil 4 and the driving magnet group 5 and between the driving magnet group and the flanging magnet 10, according to the Fleming left-hand rule, due to the action of the electromagnetic force, the lens module is driven to move linearly along the optical axis direction, and the lens module finally stays at a position point when the resultant force of the electromagnetic force generated between the driving coil 4 and the driving magnet and between the flanging magnet 10 and the elastic force of the upper spring 6 and the lower spring 7 reaches a balanced state. The lens module can be controlled to move to the target position by applying a set current to the driving coil 4, so that the aim of automatic focusing is fulfilled.
Referring to fig. 3, the driving coil 4 has an octagonal structure including four long sides and four short sides. The straight plate-shaped structure of the driving magnet group 5 is attached to the outer side of the long edge of the driving coil 4 and is matched in shape, and the trapezoid structure is attached to the outer side of the short edge of the driving coil 4 and is matched in shape. At the same time, the other three sides of the driving magnet group 5 are respectively attached to the inner peripheral surface of the frame 8. Because the corner radian of the short edge of the driving coil 4 is large, the iron shell flanging 9 correspondingly arranged on the shell 1 is suitable for aligning with the winding carrier 3. Therefore, the burring magnet 10 is disposed inside the iron shell burring 9, that is, the burring magnet 10 is disposed inside the short side of the drive coil 4. When the driving coil 4 is electrified, the magnetic field passing through the trapezoidal structure of the driving magnet group 5 can directly penetrate through the flanging magnet 10, and the magnetic field lines are not dissipated. This drive magnet group 5 simple to operate can the limited motor accommodation space of make full use of, promotes first group drive power to the at utmost to drive power with the second group and play fine synergism. Of course, the driving coil 4 may have another polygonal structure symmetrical about its center, and the shape of the driving magnet group 5 may be adjusted adaptively.
In one embodiment, the base 2 is coupled to a bracket.
In this embodiment, the base 2 is mounted on a bracket, and the bracket is provided with corresponding potential coupling points, so as to form an electrical connection between the base 2 and the bracket. The base 2 is not limited to being mounted on a stand and may be coupled to the electronic device in other forms.
In one embodiment, the drive coil 4 is wound on the bobbin 3 by injection molding.
In this embodiment, the driving coil 4 is placed in a mold, and then the bobbin 3 is molded such that the bobbin 3 is integrally formed with the driving coil 4. This coupling manner ensures stability in coupling the core component bobbin carrier 3 and the driving coil 4, thereby improving stability in driving the lens module.
In one embodiment, several points on the inner surface of the upper spring 6 are fixed on the upper end surface of the winding carrier 3, and several points on the inner surface of the lower spring 7 are fixed on the lower end surface of the winding carrier 3.
In this embodiment, a plurality of small circular holes are formed in the inner circle surface of the upper spring 6, glue is dispensed in the small circular holes, and a corresponding glue storage groove is formed in the upper surface of the winding carrier 3. Or the glue storage groove is replaced by a fixed column, a small circular hole on the inner circle surface of the upper spring 6 is sleeved on the fixed column, and then glue is dispensed and fixed. The fixing mode of the inner ring surface of the lower spring 7 is the same. In one embodiment, the base 2 is provided with a circular hole in the center, and a raised dust ring is arranged on the inner side surface of the circular hole and is matched with the winding carrier 3.
Referring to fig. 1, the dust ring is engaged with the winding carrier 3 to effectively prevent dust from entering, so that the surface of the lens module mounted on the winding carrier 3 is kept clean, and the definition of shooting and imaging is ensured.
In one embodiment, the flanging magnet 10 is bonded to the inner side surface of the iron shell flanging 9 by gluing.
In this embodiment, the iron shell burring 9 has a plate-like structure, and therefore the burring magnet 10 also has a plate-like structure, and the surface thereof corresponding to the driving coil 4 is parallel. In other embodiments, when the surfaces of the driving coil 4 corresponding to the flanged magnet 10 are arc-shaped, the flanged magnet 10 and the iron shell flange 9 are in corresponding arc-shaped structures. The flanging magnet 10 can be bonded on the inner side surface of the iron shell flanging 9 through glue, when the equipment provided with the lens driving device is easy to shake greatly, a limiting groove can be additionally formed in the inner side surface of the iron shell flanging 9, and the flanging magnet 10 is placed in the limiting groove and bonded through glue. Or, the iron shell flanging 9 is provided with a limiting through hole, the limiting through hole is matched with the flanging magnet 10 in shape, and the flanging magnet 10 is embedded into the limiting through hole and bonded and combined through glue. Thus, even when large vibration or impact occurs, the turnup magnet 10 is not easy to shift or fall off, and stable driving force is provided by the lens driving device.
Example two
Referring to fig. 7, the drive magnet group 5 is formed by joining a trapezoidal first drive magnet 11 and a straight second drive magnet 12. The first drive magnet 11 and the second drive magnet 12 are separately processed, so that the process is simpler, the cost is lower, and the adaptability to the drive coils 4 with various shapes is stronger.
EXAMPLE III
An image pickup apparatus includes the lens driving apparatus according to any one of the first to second embodiments.
In this embodiment, the lens driving device is coupled to the image pickup device through the base 2, and provides a focusing and aligning function for the image pickup device. The lens driving device has a motor with large thrust and long stroke, and can be applied to shooting of a long-focus lens.
Example four
A mobile terminal comprises the camera device in the third embodiment.
In one embodiment, the mobile terminal is any one of a mobile phone, a notebook computer and a terminal carrying camera information.
The lens driving device, the camera device and the mobile terminal provided by the invention develop a motor with large thrust and far stroke on the basis of the limited space of the existing motor, and ensure that a lens module can reach a target stroke position. On the basis of the conventional driving mechanism, the first group of driving mechanisms and the second group of driving mechanisms are creatively matched, so that the driving force of the motor lens is greatly enhanced.
The invention greatly enhances the driving force of the motor by using limited space; on the premise of ensuring that the thrust requirement reaches the standard, the volume of the driving mechanism can be reduced, and a favorable space is created for the miniaturization and thinning of the motor; the yield and quality of the product are improved, and the loss is reduced. The invention is not limited to the mobile phone, and can also be applied to the functional fields of vehicle-mounted, security, USBcamara and the like.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (8)
1. A lens driving device characterized in that: the magnetic coil winding device comprises a shell, a base, a winding carrier, a driving coil, a driving magnet group, an upper spring, a lower spring, a frame and a flanging magnet; the housing is coupled to the base; the frame is disposed within the housing; the periphery of the upper spring is fixed on the frame, and the inner ring surface of the upper spring is connected to the upper end surface of the winding carrier; four corners of the lower spring are fixed on the base, and the inner ring surface is fixedly connected to the lower end surface of the winding carrier; the driving coil is wound on the outer side of the winding carrier; the driving magnet group is bent, one folded edge of the driving magnet group is in a straight plate shape, the other folded edge of the driving magnet group is in a trapezoid shape, and three sides of the other folded edge of the driving magnet group are in contact with the inner peripheral surface of the frame; the driving magnet groups are uniformly distributed on the outer side of the driving coil and are symmetrical about the central axis of the driving coil; the shell is provided with an iron shell flanging which is connected with and inserted into the notch on the opposite winding carrier; the flanging magnet is arranged on the inner side of the flanging of the iron shell.
2. The lens driving device according to claim 1, wherein: the drive magnet group is formed by splicing a first drive magnet in a trapezoidal shape and a second drive magnet in a straight plate shape.
3. The lens driving device according to claim 1, wherein: the driving coil is wound on the winding carrier through injection molding.
4. The lens driving device according to claim 1, wherein: the center of the base is provided with a round hole, the inner side surface of the round hole is provided with a raised dustproof ring, and the dustproof ring is matched with the winding carrier.
5. The lens driving device according to claim 1, wherein: the flanging magnet is bonded on the inner side surface of the flanging of the iron shell through glue.
6. An image pickup apparatus comprising the lens driving apparatus according to any one of claims 1 to 5.
7. A mobile terminal characterized by comprising the camera device recited in claim 6.
8. The mobile terminal of claim 7, wherein: the mobile terminal is any one of a mobile phone, a notebook computer and a terminal carrying camera information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011643596.9A CN112630926A (en) | 2020-12-31 | 2020-12-31 | Lens driving device, camera device and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011643596.9A CN112630926A (en) | 2020-12-31 | 2020-12-31 | Lens driving device, camera device and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112630926A true CN112630926A (en) | 2021-04-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011643596.9A Withdrawn CN112630926A (en) | 2020-12-31 | 2020-12-31 | Lens driving device, camera device and mobile terminal |
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| Country | Link |
|---|---|
| CN (1) | CN112630926A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489173A (en) * | 2021-06-30 | 2021-10-08 | 新思考电机有限公司 | Magnet structure, lens driving device, camera device and electronic equipment |
| CN115473979A (en) * | 2021-06-11 | 2022-12-13 | 宁波舜宇光电信息有限公司 | Motor, camera module and assembling method thereof |
-
2020
- 2020-12-31 CN CN202011643596.9A patent/CN112630926A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115473979A (en) * | 2021-06-11 | 2022-12-13 | 宁波舜宇光电信息有限公司 | Motor, camera module and assembling method thereof |
| CN113489173A (en) * | 2021-06-30 | 2021-10-08 | 新思考电机有限公司 | Magnet structure, lens driving device, camera device and electronic equipment |
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Application publication date: 20210409 |