CN209946506U - Lens driving device, camera device and electronic equipment - Google Patents
Lens driving device, camera device and electronic equipment Download PDFInfo
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- CN209946506U CN209946506U CN201920214644.9U CN201920214644U CN209946506U CN 209946506 U CN209946506 U CN 209946506U CN 201920214644 U CN201920214644 U CN 201920214644U CN 209946506 U CN209946506 U CN 209946506U
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- permanent magnet
- carrier
- coil
- holding part
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Abstract
The present disclosure provides a lens driving device including: a carrier on which a lens is mounted; a guide shaft along which the carrier is movable; and a magnetic spring provided to hold the carrier at an origin position by a magnetic force without energizing the driving means.
Description
Technical Field
The present disclosure relates to a lens driving device, a camera device, and an electronic apparatus.
Background
At present, in a voice coil motor, a carrier is fixed by using upper and lower elastic sheets, a lens is carried on the carrier, and a controllable current is applied to a coil wound on the carrier to generate a magnetic field interacting with a permanent magnet fixed on the periphery, so that the lens is controlled to move, and a focusing effect is achieved.
Because the voice coil motor in the prior art adopts the upper and lower shrapnels to support the carrier to move up and down, the thickness of the shrapnel is usually within 0.1 mm, and the shock resistance is poor. In the assembling process, the elastic sheet is easy to deform to cause poor function and the like, and simultaneously, the resonance problem in the focusing process is easy to occur.
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 apparatus, and an electronic apparatus.
According to an aspect of the present disclosure, a lens driving apparatus includes: a carrier on which a lens is mounted; a guide shaft along which the carrier is movable; and a magnetic spring provided to hold the carrier at an origin position by a magnetic force without energizing the driving means.
According to at least one embodiment of the present disclosure, a lens driving apparatus includes: the lens driving device further includes a coil, the magnetic spring includes a permanent magnet and an origin holding portion, wherein: the permanent magnet is fixed to an outer side of the carrier, and the coil is disposed at the outer side of the permanent magnet and spaced apart from the permanent magnet by a predetermined distance, the carrier being moved along the guide shaft by an interaction of the coil and the permanent magnet when the coil is energized; and the origin holding part is arranged outside the coil and used for providing a predetermined initial force to hold the carrier at the origin position through the magnetic force between the permanent magnet and the origin holding part under the condition that the coil is not electrified.
According to at least one embodiment of the present disclosure, the origin holding part is a sheet shape, one side of the origin holding part is fixed to a base of the driving device, and the origin holding part is made of a material capable of generating a magnetic force with the permanent magnet.
According to at least one embodiment of the present disclosure, the origin holding part is square or rectangular.
According to at least one embodiment of the present disclosure, the origin holding part is shaped such that a mutual magnetic force between the permanent magnet and an upper portion of the origin holding part is smaller than a mutual magnetic force between the permanent magnet and a lower portion of the origin holding part.
According to at least one embodiment of the present disclosure, an area of an upper portion of the sheet-like shape is smaller than an area of a lower portion, wherein a bottom side of the lower portion of the origin holding portion of the sheet-like shape is fixed to a base of the driving device.
According to at least one embodiment of the present disclosure, the sheet-like shape is a triangle, a trapezoid, or a house shape.
According to at least one embodiment of the present disclosure, a sliding sleeve is disposed on an outer side of the carrier, a sliding column is disposed on a base of the driving device, and the sliding sleeve is sleeved to the sliding column so as to perform relative movement; the permanent magnet is a permanent magnet which is magnetized by two poles on a single surface, the coil is a runway coil, and the coil is an iron sheet.
According to another aspect of the present disclosure, a camera apparatus includes: the lens driving device and the lens are arranged in the lens driving device and are driven by the lens driving device to move.
According to still another aspect of the present disclosure, an electronic apparatus includes the camera device 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 an exploded schematic view of a lens driving apparatus according to one embodiment of the present disclosure.
Fig. 2 is a schematic assembled top view of a lens driving device according to one embodiment of the present disclosure.
Fig. 3 is a schematic view of an origin holding unit according to one embodiment of the present disclosure.
Fig. 4 is a schematic view of a guide shaft according to one aspect of the present disclosure.
Fig. 5 is a schematic diagram of a lens driving apparatus 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. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
According to an embodiment of the present disclosure, there is provided a lens driving apparatus including: a carrier on which a lens is mounted; a guide shaft along which the carrier is movable; and a magnetic spring provided to hold the carrier at an origin position by a magnetic force without energizing the driving means.
Fig. 1 provides an exploded view of a lens driving apparatus according to an embodiment of the present disclosure, and fig. 2 shows an assembled top view of the lens driving apparatus according to an embodiment of the present disclosure (a housing is not shown).
As shown in fig. 1 and 2, the lens driving device 10 may include a carrier 11, a permanent magnet 12, an origin holding part 13, a coil 14, a guide shaft 15, a housing 16, and a base 17.
Wherein the carrier 11 is a supporting frame for a lens (not shown), the lens being placed inside the carrier, and the lens moving up and down as the carrier moves up and down.
The permanent magnets 12 may be arranged on the outside of the carrier 11, wherein, although one permanent magnet is shown in fig. 1 (because the permanent magnet blocking the other side is not shown), it should be understood by those skilled in the art that the permanent magnets may be arranged on four sides or two opposite sides of the carrier 11.
The origin holding part 13 may be disposed outside the permanent magnet 12 at a predetermined distance from the permanent magnet 12, and the bottom side of the origin holding part 13 may be fixed to the base 17. Here, the origin holding portion 13 may be provided on four sides, two opposite sides, corresponding to the permanent magnet 12, according to the arrangement of the permanent magnet 12. The origin holding portion 13 corresponding to the permanent magnet 12 may be provided on one side surface.
The coil 14 may be disposed between the permanent magnet 12 and the origin holding part 13, and may be fixed on the base 17. When the coil 14 is powered on, a magnetic field is formed between the coil and the permanent magnet 12, so that the permanent magnet 12 is subjected to magnetic force to move up and down by the action of the magnetic field as the coil 14 is fixed on the base 17, the carrier 11 is driven to move up and down as the permanent magnet 12 moves up and down, and the carrier 11 moves up and down along the guide shaft 15 as the guide shaft 15 is arranged. One end of the guide shaft 15 may be fixed to the base 17, and one or both corner ends of the carrier 11 are fitted over the guide shaft 15. It will of course be appreciated by those skilled in the art that the carrier 11 may be provided with guide shafts 15 at three or four angular ends.
The case 16 is provided outside the carrier 11, the permanent magnet 12, the origin holding portion 13, the coil 14, and the guide shaft 15, and provides a housing case. And the housing 16 may be fixedly connected to the base 17.
According to an embodiment of the present disclosure, the origin holding part 13 and the permanent magnet 12 form a magnetic spring by a magnetic force therebetween, so that the carrier 11 is held at the position of the origin, that is, an initial force is provided to hold the carrier 11 at a predetermined position, without being energized. When energized (the coil 14 is energized), the permanent magnet 12 can move up and down against the initial force with the origin holding portion 13 due to the magnetic force action between the coil 14 and the permanent magnet 12, and the carrier 11 moves up and down.
In the conventional voice coil motor, the upper and lower elastic pieces located at the upper and lower sides of the carrier are used to support the carrier and provide the initial force, which has various problems. In the embodiment of the present disclosure, the carrier is supported by the magnetic gas spring and provides the initial force, and the guide rail structure is used, so that impact resistance, assembly simplification, yield improvement and resonance resistance can be achieved.
The origin holding portion 13 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 13 may be rectangular, square, trapezoidal, triangular, house-shaped, or the like. In the selection of the shape of the origin holding portion 13, it is preferable to make a linear relationship as the opposing area between the origin holding portion 13 and the permanent magnet 12 and the magnetic force therebetween are in a linear relationship, for example, the smaller the opposing area is, the smaller the magnetic force therebetween is. And the magnetic force between the two can also be changed by adjusting the size and thickness of the origin holding part 13 according to the actual use situation.
In fig. 3, an alternative shape of the origin holding portion 13 is shown. In fig. 3a, the origin holding part 13 of a triangle shape is shown and the guide shaft 15 is shown at both sides of the diagonal line, fig. 3b is a sectional view a-a of fig. 3a, and as can be seen from fig. 3b, the origin holding part 13 and the coil 14 are provided on the base 17, and the permanent magnet 12 is provided outside the carrier 11, and the carrier 11 can be moved along the guide shaft 15. In fig. 3c, the origin holding part 13 of a house shape is shown and the guide shaft 15 is shown on both sides of the diagonal line, fig. 3d is a sectional view a-a of fig. 3c, and as can be seen from fig. 3c, the origin holding part 13 and the coil 14 are provided on the base 17, and the permanent magnet 12 is provided on the outer side of the carrier 11, and the carrier 11 can be moved along the guide shaft 15. For example, in one alternative embodiment of the present disclosure, the origin holding portion 13 is shaped such that: the mutual magnetic force between the permanent magnet 12 and the upper portion of the origin holding part 13 is smaller than the mutual magnetic force between the permanent magnet 12 and the lower portion of the origin holding part 13. That is, the area of the upper portion of the origin holding portion 13 is smaller than the area of the lower portion, and there may be two oblique sides in the upper portion of the origin holding portion 13, according to which a better effect of the magnetic-gas spring can be obtained.
In one embodiment of the present disclosure, as shown in fig. 4, the guide shaft 15 may be in the form of a bearing, which may include two parts, one part is a shaft sleeve 151 integrally formed with the carrier 11, and the other part is a guide post 152 having one end fixed to the base 17, and the shaft sleeve 151 is fitted over the guide post 152 to slide along the guide post 152. And the middle portion 153 of the sleeve 151 may be provided in an outwardly convex shape (e.g., the cross-sectional area of the middle portion 153 is larger than the cross-sectional area of the rest of the sleeve 151, such as a shape that is thin on both sides of the middle drum), and lubricating oil or the like may be placed in the middle portion 153 to provide a smooth function.
As shown in fig. 5, the permanent magnet 12 is a single-sided two-pole magnetized permanent magnet, and includes, for example, an N/S pole 121 and an S/N pole 122 having a polarity opposite to that of the N/S pole 121, and the coil 14 is a racetrack coil.
According to another aspect of the present disclosure, there is provided a camera apparatus including: the lens driving device and the lens are arranged in the lens driving device so as to be driven by the lens driving device to move.
According to an aspect of the present disclosure, there is also provided an electronic apparatus including the 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.
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.
Claims (10)
1. A lens driving device, comprising:
a carrier on which a lens is mounted;
a guide shaft along which the carrier is movable; and
a magnetic spring provided to hold the carrier at an origin position by a magnetic force without energizing the driving means.
2. The apparatus of claim 1, comprising: the lens driving device further includes a coil, the magnetic spring includes a permanent magnet and an origin holding portion, wherein:
the permanent magnet is fixed to an outer side of the carrier, and the coil is disposed at the outer side of the permanent magnet and spaced apart from the permanent magnet by a predetermined distance, the carrier being moved along the guide shaft by an interaction of the coil and the permanent magnet when the coil is energized; and
the origin holding part is provided outside the coil and is used for providing a predetermined initial force to hold the carrier at an origin position by a magnetic force between the permanent magnet and the origin holding part when the coil is not electrified.
3. The apparatus of claim 2, wherein the origin holding part is a sheet shape, one side of the origin holding part is fixed to a base of the driving apparatus, and the origin holding part is made of a material capable of generating a magnetic force with the permanent magnet.
4. The apparatus of claim 3, wherein the origin holding portion is square or rectangular.
5. The apparatus of claim 2 or 3, wherein the origin holding part is shaped such that a mutual magnetic force between the permanent magnet and an upper portion of the origin holding part is smaller than a mutual magnetic force between the permanent magnet and a lower portion of the origin holding part.
6. The apparatus of claim 3, wherein an upper portion of the sheet-like shape has an area smaller than that of a lower portion, wherein a bottom side of the lower portion of the origin holding portion of the sheet-like shape is fixed to a base of the driving means.
7. The device of claim 6, wherein the sheet-like shape is triangular, trapezoidal, or roof-like.
8. The apparatus of claim 2,
a sliding sleeve is arranged on the outer side of the carrier, a sliding column is arranged on a base of the driving device, and the sliding sleeve is sleeved on the sliding column so as to move relatively;
the permanent magnet is a permanent magnet which is magnetized by two poles on a single surface, the coil is a runway coil, and the coil is an iron sheet.
9. A camera device, comprising:
the lens driving device as claimed in any one of claims 1 to 8, and
and the lens is arranged in the lens driving device and is driven by the lens driving device to move.
10. An electronic device characterized by comprising the camera device according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920214644.9U CN209946506U (en) | 2019-02-20 | 2019-02-20 | Lens driving device, camera device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920214644.9U CN209946506U (en) | 2019-02-20 | 2019-02-20 | Lens driving device, camera device and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209946506U true CN209946506U (en) | 2020-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920214644.9U Active CN209946506U (en) | 2019-02-20 | 2019-02-20 | Lens driving device, camera device and electronic equipment |
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| CN (1) | CN209946506U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109739009A (en) * | 2019-02-20 | 2019-05-10 | 重庆睿恩光电子有限责任公司 | Lens driver, cam device and electronic equipment |
-
2019
- 2019-02-20 CN CN201920214644.9U patent/CN209946506U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109739009A (en) * | 2019-02-20 | 2019-05-10 | 重庆睿恩光电子有限责任公司 | Lens driver, cam device and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Lens driving device, camera device and electronic equipment Effective date of registration: 20210330 Granted publication date: 20200114 Pledgee: Sichuan Tianfu Bank Co.,Ltd. Panzhihua Renhe sub branch Pledgor: Ruien photoelectric Co.,Ltd. Registration number: Y2021510000018 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |