CN210488101U - Lens driving device, camera device and electronic apparatus - Google Patents
Lens driving device, camera device and electronic apparatus Download PDFInfo
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- CN210488101U CN210488101U CN201921150288.5U CN201921150288U CN210488101U CN 210488101 U CN210488101 U CN 210488101U CN 201921150288 U CN201921150288 U CN 201921150288U CN 210488101 U CN210488101 U CN 210488101U
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Abstract
The present disclosure provides a lens driving device including: a lens support barrel for supporting at least one lens; a base including a side wall portion forming a space surrounding the lens holding cylinder; a guide support ball member which is in contact with an outer side wall of the lens support cylinder and an inner side wall of the side wall portion of the base, and rolls when the lens support cylinder moves in the optical axis direction of the lens with respect to the side wall portion; a permanent magnet on the lens support cylinder; and the coil, include the first coil and second coil to locate at sidewall portion at least, and first coil and second coil and first permanent magnet and second permanent magnet are opposite to set up separately, wherein, first permanent magnet and second permanent magnet are set up on the relative both sides of the lens support tube, and the reverse offset relative to reference line, the reference line passes the central point of the lens support tube and is perpendicular to surface of the first permanent magnet and second permanent magnet. The disclosure also provides a camera device and an electronic device.
Description
Technical Field
The present disclosure relates to a lens driving device, a camera device, and an electronic apparatus.
Background
At present, a camera function is provided in each of electronic devices such as mobile phones or personal mobile terminals, and in order to realize functions such as auto zoom, optical zoom, or optical image stabilization for cameras, it is necessary to use a lens driving apparatus capable of driving a lens.
The lens driving apparatus drives the lens using a driving force generated by the actuator, thereby changing a distance of the lens, thereby achieving a function of zooming or focusing, etc.
However, in the manufacturing process of the lens driving device, a plurality of parts are required, and the manufacturing cost is high and the manufacturing process is complicated, so that the manufacturing is difficult. Meanwhile, smooth sliding or the like is required during the operation of the lens driving device.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one of the above-described technical problems, the present disclosure provides a lens driving device, a camera device, and an electronic apparatus.
According to an aspect of the present disclosure, a lens driving apparatus includes:
a lens support barrel for supporting at least one lens;
a base including a sidewall portion forming a space surrounding the lens support barrel;
a guide support ball member that is in contact with an outer side wall of the lens support cylinder and an inner side wall of the side wall portion of the base, and rolls when the lens support cylinder moves in the optical axis direction of the lens with respect to the side wall portion;
the permanent magnet at least comprises a first permanent magnet and a second permanent magnet, and the first permanent magnet and the second permanent magnet are positioned on the lens supporting cylinder; and
a coil, the coil at least comprises a first coil and a second coil which are positioned on the side wall part and are respectively opposite to the first permanent magnet and the second permanent magnet,
the first permanent magnet and the second permanent magnet are arranged on two opposite sides of the lens support barrel and are reversely offset relative to a reference line, and the reference line passes through the center position of the lens support barrel and is perpendicular to the surfaces of the first permanent magnet and the second permanent magnet.
According to at least one embodiment of the present disclosure, the guide support ball member includes a first ball member and a second ball member, the first ball member and the second ball member are in contact with an outer sidewall of the lens support cylinder and an inner sidewall of the sidewall portion of the base, and the first ball member and the second ball member roll when the lens support cylinder moves relative to the sidewall portion.
According to at least one embodiment of the present disclosure, the first and second ball members are located diagonally of the base.
According to at least one embodiment of the present disclosure, the first ball member and the second ball member include three balls, respectively, which are arranged in the optical axis direction, and the upper ball and the lower ball have the same diameter and are larger than the diameter of the middle ball.
According to at least one embodiment of the present disclosure, the first and second permanent magnets are oppositely offset, and when the first and second coils and the first and second permanent magnets interact with each other, the lens support cylinder generates a rotational force in a plane perpendicular to the optical axis direction, and the guide support ball member is brought into close contact with the outer sidewall of the lens support cylinder and the inner sidewall of the sidewall portion of the base by the rotational force.
According to at least one embodiment of the present disclosure, the outer sides of the upper balls of the first and second ball members are provided with upper baffles, and the outer sides of the lower balls are provided with lower baffles, by which moisture is prevented from entering the first and second ball members.
According to at least one embodiment of the present disclosure, the coil winding device further includes an origin holding portion including a first origin holding portion and a second origin holding portion provided outside the first coil and the second coil, respectively,
when the first coil and the second coil are electrified, the lens supporting barrel is moved through the interaction of the first coil and the second coil with the first permanent magnet and the second permanent magnet respectively,
when the first coil and the second coil are not energized, a predetermined initial force is provided to hold the lens support cylinder at the origin position by magnetic forces between the first permanent magnet and the second permanent magnet and the first origin holding portion and the second origin holding portion, respectively.
According to at least one embodiment of the present disclosure, further comprising: a Hall detection unit which detects the movement amount of the lens support cylinder by detecting the change of the magnetic field of the permanent magnet when the lens support cylinder moves.
According to another aspect of the present disclosure, a camera apparatus includes:
the lens driving device as described above;
at least one lens secured within the lens support barrel; and
an image sensor to receive light passing through the at least one lens.
According to yet another aspect of the present disclosure, an electronic device includes the camera apparatus as described above.
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 exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 is a schematic top cross-sectional view of a lens driving apparatus according to one embodiment of the present disclosure.
Fig. 2 is a schematic view of a ball member of a lens driving apparatus according to one embodiment of the present disclosure.
Fig. 3 is a right side schematic sectional view of a lens driving apparatus according to an embodiment of the present disclosure.
Fig. 4 is a left side schematic cross-sectional view of a lens driving apparatus according to one embodiment of the present disclosure.
Fig. 5 is a schematic view of a rotational force of a lens driving device according to one embodiment of the present disclosure.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Accordingly, unless otherwise indicated, features of the various embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.
The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.
When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.
For descriptive purposes, the present disclosure may use spatially relative terms such as "below … …," "below … …," "below … …," "below," "above … …," "above," "… …," "higher," and "side (e.g., as in" side walls ") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
According to an embodiment of the present disclosure, there is provided a lens driving apparatus.
Fig. 1 shows a schematic top-view cross-sectional view of a lens driving device according to one embodiment of the present disclosure.
As shown in fig. 1, the lens driving apparatus includes: a base 100, a lens support cylinder 200, a permanent magnet 300, a coil 400, and a guide support ball member 500.
The lens support barrel 200 serves to support at least one lens, adjust a focal length of the lens by movement of the lens support barrel 200, and the like.
The base 100 includes a side wall portion forming a space surrounding the lens support barrel 200. Although not shown in fig. 1, the base 100 may further include a bottom portion, and the side wall portion extends from the bottom portion, for example, in the optical axis direction from the bottom portion, thus forming a space surrounding the lens support barrel 200.
The guide support ball member 500 is in contact with the outer wall of the lens support cylinder 200 and the inner wall of the side wall of the base 100, and when the lens support cylinder 200 moves in the optical axis direction of the lens with respect to the side wall, the guide support ball member 500 rolls.
In one embodiment, the guide support ball member 500 includes a first ball member 501 and a second ball member 502, the first ball member 501 and the second ball member 502 are in contact with an outer sidewall of the lens support barrel 200 and an inner sidewall of a sidewall portion of the base 100, and the first ball member 501 and the second ball member 502 roll when the lens support barrel 200 moves with respect to the sidewall portion.
Fig. 2 shows a schematic representation of the first ball member 501. As shown in fig. 2, the first ball member 501 may include an upper ball 5011, a middle ball 5012, and a lower ball 5013. The upper ball 5011 and the lower ball 5013 may have the same diameter and be larger than the diameter of the middle ball 5012.
Likewise, the second ball member 502 may include an upper ball, a middle ball, and a lower ball. The upper and lower balls may be the same diameter and larger than the diameter of the middle ball. The middle ball is used for assisting the rolling of the upper ball and the lower ball.
As shown in fig. 1, a ball groove may be formed at an outer side of the lens support cylinder 200 and an inner side of the sidewall portion of the base 100 to receive the ball. The first and second ball members 501 and 502 are in contact with the outer wall of the lens support cylinder 200 and the inner wall of the side wall of the base 100, and when the lens support cylinder 200 moves relative to the side wall, the first and second ball members 501 and 502 roll.
Optionally, the first ball member 501 and the second ball member 502 are located at diagonal positions of the base 100.
The permanent magnet 300 at least includes a first permanent magnet 301 and a second permanent magnet 302, and the first permanent magnet 301 and the second permanent magnet 302 are located on the lens support barrel 200. The first and second permanent magnets 301 and 302 may be located on the outer sidewall of the lens support barrel 200 as shown in fig. 1, and may be integrally formed with the lens support barrel 200.
The first and second permanent magnets 301 and 302 may be disposed on opposite sides of the lens support barrel 200 and oppositely offset with respect to a reference line (e.g., a transverse chain line as shown in fig. 1) passing through a center position of the lens support barrel 200 and perpendicular to surfaces of the first and second permanent magnets 301 and 302.
The coil 400 includes at least a first coil 401 and a second coil 402, the first coil 401 and the second coil 402 are located on the sidewall portion, and the first coil 401 and the second coil 402 are respectively disposed opposite to the first permanent magnet 301 and the second permanent magnet 302. The coil 400 may be a toroidal coil.
The first permanent magnet 301 and the second permanent magnet 302 are oppositely disposed, and when the first coil 401 and the second coil 402 interact with the first permanent magnet 301 and the second permanent magnet 302, the lens support cylinder 200 generates a rotational force in a plane perpendicular to the optical axis direction, and the guide support ball member 500 is brought into close contact with the outer sidewall of the lens support cylinder 200 and the inner sidewall of the base 100 by the rotational force. For example, as shown in fig. 1 and 2, four points 510, 520, 530, 540 of the upper and lower balls of the first and second ball members 501, 502 can be ensured to be in close contact with the outer sidewall of the lens holding cylinder 200 and the inner sidewall of the sidewall portion of the base 100. Thus, the first and second ball members 501 and 502 can be closely attached to the ball grooves to arouse accurate guiding during the up-and-down movement of the lens holding cylinder 200.
For example, as shown in fig. 1, the outer wall of the lens holding cylinder 200 and the side wall of the base 100 may form a rolling groove, and the rolling groove may have at least four points of contact with the upper ball and the lower ball.
As shown in fig. 2, the outer sides of the upper balls of the first and second ball members 501 and 502 may be provided with upper baffles 550, and the outer sides of the lower balls are provided with lower baffles 560, and moisture is prevented from entering the first and second ball members 501 and 502 by the upper and lower baffles 550 and 560. The middle portions 570 of the upper and lower baffles 550 and 560 may be the outer sidewalls of the lens holding cylinder 200 or the sidewall portions of the base 100. By adding baffles at two ends of the ball and using dry lubricant in the ball groove, the water can be prevented from entering, and the ball can be washed by using a centrifuge.
According to one embodiment, the lens driving apparatus may further include a hall detection unit 700, and the hall detection unit 700 detects the moving amount of the lens support barrel 200 by detecting the change in the magnetic field of the permanent magnet 300 when the lens support barrel 200 moves.
Fig. 3 and 4 show a right-side sectional view and a left-side sectional view of the lens driving apparatus shown in fig. 1, respectively.
According to one embodiment, the lens driving device may further include an origin holding portion 600, which may include a first origin holding portion 601 and a second origin holding portion 602, the first origin holding portion 601 and the second origin holding portion 602 being disposed outside the first coil 401 and the second coil 402, respectively.
When the first coil 401 and the second coil 402 are energized, the lens support barrel 200 is moved by the interaction of the first coil 401 and the second coil 402 with the first permanent magnet 301 and the second permanent magnet 302, respectively,
when the first coil 401 and the second coil 402 are not energized, a predetermined initial force is applied to hold the lens support barrel 200 at the origin position by the magnetic force between the first permanent magnet 301 and the second permanent magnet 302 and the first origin holding portion 601 and the second origin holding portion 602, respectively.
According to an embodiment of the present disclosure, the origin holding part 600 and the permanent magnet 300 form a magnetic spring by a magnetic force therebetween, thus holding the lens support barrel 200 at the position of the origin without being energized, that is, providing an initial force to hold the lens support barrel 200 at a predetermined position. When power is applied (the coil 400 is energized), the permanent magnet 300 moves up and down against an initial force with respect to the origin holding portion 600 due to a magnetic force between the coil 400 and the permanent magnet 300, and thus the lens support barrel 200 moves up and down.
The origin holding portion 600 is made of a material capable of generating a magnetic force with the permanent magnet, and may be a sheet, such as an iron sheet or the like.
And the shape of the origin holding part 600 may be rectangular, square, trapezoidal, triangular, house-shaped, etc. In the selection of the shape of the origin holding portion 600, it is preferable to make a linear relationship as the opposing area between the origin holding portion 600 and the permanent magnet 300 and the magnetic force therebetween are linear, for example, the smaller the opposing area is, the smaller the magnetic force therebetween is. And the magnetic force between the two can be changed by adjusting the size and thickness of the origin holding part 600 according to the actual use condition.
In an alternative embodiment of the present disclosure, the origin holding part 600 is shaped such that: the mutual magnetic force between the permanent magnet 300 and the upper portion of the origin holding part 600 is smaller than the mutual magnetic force between the permanent magnet 300 and the lower portion of the origin holding part 600. That is, the area of the upper portion of the origin holding part 600 is smaller than the area of the lower portion, and there may be two inclined sides in the upper portion of the origin holding part 600, according to which a better effect of the magnetic-gas spring can be obtained.
Fig. 5 shows a schematic view of the rotational force. The first permanent magnet 301 and the second permanent magnet 302 are oppositely disposed, and when the first coil 401 and the second coil 402 interact with the first permanent magnet 301 and the second permanent magnet 302, the lens support cylinder 200 generates a rotational force in a plane perpendicular to the optical axis direction, and the guide support ball member 500 is brought into close contact with the outer sidewall of the lens support cylinder 200 and the inner sidewall of the base 100 by the rotational force.
For example, due to the mutual attraction between the first coil 401 and the second coil 402 and the first permanent magnet 301 and the second permanent magnet 302, a torque is generated in relation to Δ r (the offset distance between the first coil and the second coil and the center line) and F1 (the attraction received by the permanent magnet), and because of the torque, a rotational force F2 (related to the distance r2 between the center of the ball and the center of the lens holder) is generated in the lens holder 200, and the rotational force F2 causes the lens holder 200 to act between the ball and the lens holder 200 and the side wall of the base 100. Thus, the balls can be closely attached to the side walls of the lens support barrel 200 and the base 100.
According to another aspect of the present disclosure, there is provided a camera apparatus including: the lens driving device described above; at least one lens fixed in the lens supporting cylinder; and an image sensor receiving light passing through the at least one lens.
According to another aspect of the present disclosure, there is provided an electronic apparatus including the above-described camera device. The electronic device is, for example, a mobile phone, a tablet, or a vehicle-mounted device.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Description of the reference numerals
100 base
200 lens supporting barrel
300 permanent magnet
301 first permanent magnet
302 second permanent magnet
400 coil
401 first coil
402 second coil
500 guide support ball member
501 first ball member
502 second ball member
510 contact point
520 contact point
530 contact point
540 contact point
550 upper baffle
560 lower baffle
570 middle part
600 origin holding part
601 first origin holding part
602 second origin holding unit
700 detection unit
5011 Upper ball
5012 middle ball
5013 lower ball
Claims (10)
1. A lens driving device, comprising:
a lens support barrel for supporting at least one lens;
a base including a sidewall portion forming a space surrounding the lens support barrel;
a guide support ball member that is in contact with an outer side wall of the lens support cylinder and an inner side wall of the side wall portion of the base, and rolls when the lens support cylinder moves in the optical axis direction of the lens with respect to the side wall portion;
the permanent magnet at least comprises a first permanent magnet and a second permanent magnet, and the first permanent magnet and the second permanent magnet are positioned on the lens supporting cylinder; and
a coil including at least a first coil and a second coil disposed on the sidewall portion and facing the first permanent magnet and the second permanent magnet, respectively,
the first permanent magnet and the second permanent magnet are arranged on two opposite sides of the lens support barrel and are reversely offset relative to a reference line, and the reference line passes through the center position of the lens support barrel and is perpendicular to the surfaces of the first permanent magnet and the second permanent magnet.
2. The lens driving apparatus as claimed in claim 1, wherein the guide support ball member includes a first ball member and a second ball member, the first ball member and the second ball member being in contact with an outer sidewall of the lens support cylinder and an inner sidewall of the sidewall portion of the base, the first ball member and the second ball member rolling when the lens support cylinder moves relative to the sidewall portion.
3. The lens driving apparatus as claimed in claim 2, wherein the first and second ball members are located at diagonal positions of the base.
4. The lens driving device according to claim 2 or 3, wherein the first ball member and the second ball member respectively include three balls which are arranged in the optical axis direction, and an upper ball and a lower ball have the same diameter and are larger than a diameter of a middle ball.
5. The lens driving apparatus as claimed in claim 1, wherein the first and second permanent magnets are oppositely offset, and when the first and second coils and the first and second permanent magnets interact, the lens support cylinder generates a rotational force in a plane perpendicular to the optical axis direction, by which the guide support ball member is brought into close contact with an outer sidewall of the lens support cylinder and an inner sidewall of the sidewall portion of the base.
6. The lens driving apparatus according to claim 4, wherein an upper baffle is provided on an outer side of the upper balls of the first and second ball members, and a lower baffle is provided on an outer side of the lower balls, and moisture is prevented from entering the first and second ball members by the upper and lower baffles.
7. The lens driving device according to claim 1, further comprising an origin holding portion including a first origin holding portion and a second origin holding portion, the first origin holding portion and the second origin holding portion being provided outside the first coil and the second coil, respectively,
when the first coil and the second coil are electrified, the lens supporting barrel is moved through the interaction of the first coil and the second coil with the first permanent magnet and the second permanent magnet respectively,
when the first coil and the second coil are not energized, a predetermined initial force is provided to hold the lens support cylinder at the origin position by magnetic forces between the first permanent magnet and the second permanent magnet and the first origin holding portion and the second origin holding portion, respectively.
8. The lens driving apparatus according to any one of claims 1 to 3, further comprising: a Hall detection unit that detects a movement amount of the lens support barrel by detecting a change in a magnetic field of the permanent magnet when the lens support barrel moves.
9. A camera apparatus, comprising:
the lens driving device according to any one of claims 1 to 8;
at least one lens secured within the lens support barrel; and
an image sensor to receive light passing through the at least one lens.
10. An electronic device characterized by comprising the camera apparatus of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921150288.5U CN210488101U (en) | 2019-07-22 | 2019-07-22 | Lens driving device, camera device and electronic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921150288.5U CN210488101U (en) | 2019-07-22 | 2019-07-22 | Lens driving device, camera device and electronic apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN210488101U true CN210488101U (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921150288.5U Active CN210488101U (en) | 2019-07-22 | 2019-07-22 | Lens driving device, camera device and electronic apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110908067A (en) * | 2019-07-22 | 2020-03-24 | 睿恩光电有限责任公司 | Lens driving device, camera device and electronic apparatus |
| US11774701B2 (en) | 2020-06-08 | 2023-10-03 | Lanto Electronic Limited | Voice coil motor |
-
2019
- 2019-07-22 CN CN201921150288.5U patent/CN210488101U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110908067A (en) * | 2019-07-22 | 2020-03-24 | 睿恩光电有限责任公司 | Lens driving device, camera device and electronic apparatus |
| US11774701B2 (en) | 2020-06-08 | 2023-10-03 | Lanto Electronic Limited | Voice coil motor |
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Denomination of utility model: Lens driving device, camera device and electronic equipment Effective date of registration: 20210330 Granted publication date: 20200508 Pledgee: Sichuan Tianfu Bank Co.,Ltd. Panzhihua Renhe sub branch Pledgor: Ruien photoelectric Co.,Ltd. Registration number: Y2021510000018 |