CN221948024U - A motor with low magnetic attraction resistance - Google Patents
A motor with low magnetic attraction resistance Download PDFInfo
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- CN221948024U CN221948024U CN202420331102.0U CN202420331102U CN221948024U CN 221948024 U CN221948024 U CN 221948024U CN 202420331102 U CN202420331102 U CN 202420331102U CN 221948024 U CN221948024 U CN 221948024U
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- magnetic sheet
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- pcb
- magnetic attraction
- magnet
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- 239000002184 metal Substances 0.000 claims abstract description 63
- 238000006073 displacement reaction Methods 0.000 claims abstract description 23
- 239000000725 suspension Substances 0.000 claims abstract description 14
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- 101001082832 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) Pyruvate carboxylase 2 Proteins 0.000 description 15
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- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The utility model belongs to the technical field of OIS motors, and discloses a low magnetic attraction resistance motor which comprises a suspension board, a PCB (printed circuit board), an FPC (flexible printed circuit) coil and a magnet; the suspension board comprises an inner board and an outer board, and the inner board and the outer board are connected through elastic wires; the PCB is used for installing the image sensor, is connected with the inner plate and is provided with a gap with the outer plate; the FPC coil is arranged on the PCB; the magnet is connected with the outer plate and used for driving the PCB to move along a first plane in cooperation with the FPC coil, and the first plane is parallel to the plane of the suspension board; a magnetic sheet is arranged on the PCB or the FPC coil, and a magnetic attraction state is formed between the metal magnetic sheet and the magnet; the PCB is provided with an avoidance structure, and the magnetic sheet is positioned in the avoidance structure. The utility model can allow the shape of the metal magnetic sheet to be adjusted so as to achieve the purpose of reducing the displacement obstruction performance of the image sensor.
Description
Technical Field
The utility model belongs to the technical field of OIS motors, and particularly relates to a low magnetic attraction resistance motor.
Background
For the sensor displacement OIS optical anti-shake motor, it is generally required that the image sensor easily generate enough mechanical stroke in the plane direction to implement OIS anti-shake function. For the coil magnetomotive structure, the limiting mode in the optical axis direction is mainly realized in a mode that a magnet adsorbs a metal magnetic sheet. The metal magnetic sheet is arranged stationary relative to the sensor and is jointly assembled on the PCB, so that the metal magnetic sheet can move relative to the magnet.
The magnet adsorbs the metal magnetic sheet and also has a force acting on it in a direction perpendicular to the optical axis, and such a force generally acts as a hindrance to displacement of the image sensor in the target direction.
Thus, the arrangement of the metal magnetic sheets needs to be adjusted to minimize the above-described blocking behavior.
Disclosure of utility model
The utility model discloses a low magnetic attraction resistance motor which can allow the shape of a metal magnetic sheet to be adjusted so as to achieve the purpose of reducing the displacement obstruction performance of an image sensor.
The specific technical scheme of the utility model is as follows:
A low magnetic attraction resistance motor comprising:
the suspension plate comprises an inner plate and an outer plate, and the inner plate and the outer plate are connected through elastic wires;
The PCB is used for installing the image sensor, is connected with the inner plate and is provided with a gap with the outer plate;
The FPC coil is arranged on the PCB; and
The magnet is connected with the outer plate and used for driving the PCB to move along a first plane in cooperation with the FPC coil, and the first plane is parallel to the plane of the suspension board;
Wherein, the PCB or FPC coil is provided with a magnetic sheet, and the magnetic attraction state is formed between the metal magnetic sheet and the magnet;
The PCB is provided with an avoidance structure, and the magnetic sheet is positioned in the avoidance structure.
In some existing technologies, a PCB board is used as a carrier to bear a component for generating displacement of an image sensor, and is provided with a hollow coil, which is used for generating interaction with a magnet at a corresponding position after being electrified, so as to further drive the image sensor to move, the hollow coil is of a runway structure, and because the metal magnetic sheets can only be arranged below the magnet, and the magnet corresponds to the hollow coil one by one in the optical axis direction, the metal magnetic sheets are required to be arranged in an inner cavity of the hollow coil, so as to realize magnetic attraction in the optical axis direction; it is known that the hollow coil is limited by the resistance and the overall size of the motor, and the width of the inner cavity formed by the hollow part is limited, so that the metal magnetic sheet can only extend along the length of the inner cavity to meet the requirement that the metal magnetic sheet and the magnet have enough magnetic force, and the plane where the metal magnetic sheet is positioned is an X-Y plane according to the distribution rule of the magnetic field of the magnet, therefore, when the length of the metal magnetic sheet is increased along the X-axis direction, the size of the metal magnetic sheet in the Y-axis direction is limited, the magnetic attraction counterforce of the metal magnetic sheet in translation along the Y-axis direction is increased, namely, the image sensor is subjected to larger resistance when moving, and the performance of the image sensor is influenced; meanwhile, the metal magnetic sheet assembly mode is only suitable for hollow coil structures and cannot be suitable for PFC coils; therefore, the structure is arranged for the PCB, so that the magnetic sheets are positioned in the structure, and the metal magnetic sheets with proper shapes and sizes can be configured according to the magnetic field distribution, thereby meeting the purposes of reducing resistance and improving anti-shake performance, and being applicable to PFC coils and hollow coils.
Preferably, the avoiding structure is a sinking groove configured on one surface of the PCB, and the metal magnetic sheet is positioned in the sinking groove.
The sink can well accommodate the metal magnetic sheets, provide arrangement positions for the metal magnetic sheets, and well fulfill the aim of reducing magnetic attraction resistance.
Preferably, the metal magnetic sheet is fixedly connected in the sink;
Or the metal magnetic sheet is fixedly connected to the FPC coil, the sinking groove is positioned on one surface of the PCB, which is connected with the FPC coil, and the position of the metal magnetic sheet corresponds to the sinking groove.
The metal magnetic sheet may be provided on one of the PCB board or the FPC coil, so that a manner in which the metal magnetic sheet is more easily assembled may be selected according to actual circumstances.
Preferably, the thickness of the magnetic sheet does not exceed the thickness of the sink.
The structure does not affect the connection between the FPC coil and the PCB, and meanwhile, the sinking groove can flexibly adjust the space size to adapt to the metal magnetic sheet so as to obtain the optimal performance.
Preferably, the avoidance structure is a notch structure configured on the PCB board;
the metal magnetic sheet is fixedly connected to the FPC coil, and the position of the metal magnetic sheet corresponds to the notch structure.
The notch structure can achieve the same technical effect as the sink.
Preferably, the method further comprises:
The limiting unit is arranged between the moving unit and the magnet to limit the movement of the moving unit in a first direction, and the first direction is perpendicular to the first plane.
The limiting unit can be matched with the attraction force between the metal magnetic sheet and the magnet, so that the moving unit can stably move along the first plane to better meet the displacement anti-shake requirement.
Preferably, the limiting unit comprises a plurality of balls;
the support is connected to the outer plate and is provided with a magnet groove for installing a magnet;
Wherein, the ball sets up between support and FPC coil.
In the prior art, the balls are usually arranged between the PCB board and the bracket or between the bracket and the base of the motor, and obviously, such an arrangement increases the size of the motor, which is not beneficial to the assembly and use of the motor, especially in smaller application scenarios, and has great limitation, so that when the balls are arranged between the bracket and the FPC coil, the requirement of plane displacement can be met by using a compact assembly structure, and the miniaturization of the motor is better realized.
Preferably, the bracket is provided with a ball groove for receiving a ball.
The ball grooves can provide proper accommodation space for the balls, so that the balls can be limited in movement in a plane parallel to the first plane, that is, the balls are positioned on the support, and stability of anti-shake displacement is ensured on the basis of reducing sliding friction.
Preferably, a gasket is adhered to the FPC coil and used for bearing the balls.
The gasket can provide protection for the FPC coil, and displacement anti-shake performance reduction caused by abrasion of balls on the FPC coil is avoided.
Preferably, the gasket covers the displacement surface of the PCB board.
The gasket covers the full stroke of PCB board, is favorable to protecting FPC coil more.
Compared with the prior art, the utility model can meet the requirement of reducing the magnetic attraction resistance between the metal magnetic sheet and the magnet on the basis of being suitable for the hollow coil and the FPC coil, so that the image sensor has more excellent displacement anti-shake performance in the first plane.
Drawings
FIG. 1 is an exploded view of an embodiment of the present utility model;
FIG. 2 is a cross-sectional view of an embodiment of the present utility model;
FIG. 3 is a schematic diagram illustrating an assembly of a metal magnetic sheet according to an embodiment of the present utility model;
FIG. 4 is a schematic view showing an assembly of a metal magnetic sheet according to an embodiment of the present utility model;
FIG. 5 is a schematic view showing an assembly of a metal magnetic sheet according to an embodiment of the present utility model;
FIG. 6 is a schematic diagram of a notch structure according to an embodiment of the present utility model;
Fig. 7 is a schematic view of a stent according to an embodiment of the present utility model.
In the figure: 1-suspending a plate; 101-an inner plate; 102-an outer plate; 103-spring wire; 2-a PCB board; 3-FPC coil; 4-magnetite; 5-metal magnetic sheet; 6-an image sensor; 7-a bracket; 8-a magnet groove; 9-sinking groove; 10-notch structure; 11-balls; 12-ball grooves; 13-a gasket; 14-a base.
Detailed Description
In order to make the technical scheme of the present utility model better understood by those skilled in the art, the present utility model will be further described in detail with reference to the following specific embodiments.
As shown in fig. 1 to 7, a low magnetic attraction resistance motor comprises a suspension board 1, a PCB board 2, an FPC coil 3 and a magnet 4; the suspension board 1 comprises an inner board 101 and an outer board 102, wherein the inner board 101 and the outer board 102 are connected through a spring wire 103; the PCB 2 is used for installing the image sensor 6, the PCB 2 is connected with the inner plate 101, and a gap is reserved between the PCB and the outer plate 102; the FPC coil 3 is arranged on the PCB 2; the magnet 4 is connected with the outer plate 102, and the magnet 4 is used for driving the PCB 2 to move along a first plane in cooperation with the FPC coil 3, and the first plane is parallel to the plane of the suspension board 1; a magnetic sheet is arranged on the PCB 2 or the FPC coil 3, and a magnetic attraction state is formed between the metal magnetic sheet 5 and the magnet 4; the PCB 2 is provided with an avoidance structure, and the magnetic sheet is positioned in the avoidance structure.
In this embodiment, the support 7 is further included, the support 7 is connected to the outer plate 102, and the support 7 is provided with a magnet groove 8 for installing the magnet 4. The bracket 7 is covered on the suspension board 1, and the components such as the PCB board 2, the FPC coil 3, the magnet 4 and the like are accommodated between the bracket 7 and the suspension board 1. The image sensor 6 is welded on the PCB 2, when shaking occurs, the FPC coil 3 is electrified and generates magnetic acting force with the magnet 4, at the moment, the image sensor 6 moves along the first plane, so that displacement anti-shaking is realized, and when the FPC coil 3 is powered off, the elastic wire 103 deforms and returns to restore to the original position, so that displacement resetting is performed. In this structure, since the metal magnetic sheet 5 and the magnet 4 have a magnetic attraction state therebetween, it is possible to ensure that the inner plate 101 remains in the same plane as the outer plate 102 after carrying the respective components, thereby ensuring the accuracy and stability of displacement anti-shake. In order to ensure that the metal magnetic sheet 5 and the magnet 4 have a magnetic attraction force meeting the requirement in the optical axis direction, so that the metal magnetic sheet 5 is manufactured in a shape and a size suitable for the distribution of the magnetic field of the magnet 4, in the prior art, due to the limitation of the structure, a magnetic attraction reaction force opposite to the anti-shake displacement is formed in the first plane, so that the magnetic attraction reaction force during the anti-shake displacement is avoided from being increased, in the embodiment, the PCB board 2 is provided with an avoiding structure to accommodate the metal magnetic sheets 5 with different specifications so as to meet specific use requirements, and the mass production is realized, so that the design cost is avoided from being increased.
In this embodiment, the avoiding structure is a sink 9 configured on one surface of the PCB 2, and the metal magnetic sheet 5 is located in the sink 9. As shown in fig. 3, in one technical solution, a sink 9 is disposed on a connection surface between the PCB 2 and the FPC coil 3, the metal magnetic sheet 5 is fixedly connected to the FPC coil 3, the sink 9 is located on a surface where the PCB 2 and the FPC coil 3 are connected, and a position of the metal magnetic sheet 5 corresponds to the sink 9; since the sinking groove 9 has made the accommodation avoidance for the metal magnetic sheet 5 in the optical axis direction, the metal magnetic sheet 5 can be welded through the bonding pad arranged at the corresponding position of the back of the FPC coil 3, and then the FPC coil 3 and the PCB 2 are welded, so that the metal magnetic sheet 5 and the PCB 2 do not interfere, and of course, as shown in fig. 4, the metal magnetic sheet 5 can also be directly and fixedly connected in the sinking groove 9. As shown in fig. 5, in another technical solution, a sink 9 is disposed on the back side of the connection surface between the PCB 2 and the FPC coil 3, and the metal magnetic sheet 5 is fixedly connected in the sink 9. To ensure that the metal magnetic sheet 5 and the outer plate 102 of the suspension plate 1 do not interfere with each other by friction during movement, the thickness of the magnetic sheet does not exceed the thickness of the sink 9.
As shown in fig. 6, in some other technical solutions of the present embodiment, the avoidance structure is a notch structure 10 configured on the PCB 2; the metal magnetic sheet 5 is fixedly connected to the FPC coil 3, and the position of the metal magnetic sheet 5 corresponds to the notch structure 10. The technical scheme is similar to that shown in fig. 3, and will not be described again here.
As shown in fig. 1, 2 and 7, in this embodiment, the device further includes a limiting unit disposed between the moving unit and the magnet 4 to limit the movement of the moving unit in a first direction, which is perpendicular to the first plane. Specifically, the limiting unit comprises a plurality of balls 11; the balls 11 are disposed between the holder 7 and the FPC coil 3. In the prior art, the balls 11 are usually disposed between the PCB board 2 and the bracket 7 or between the bracket 7 and the base 14 of the motor, and obviously, such an arrangement increases the size of the motor, which is disadvantageous for assembly and use of the motor, particularly in smaller application scenarios, and has a great limitation, so that when the balls 11 are disposed between the bracket 7 and the FPC coil 3, the requirement of planar displacement can be satisfied by using a compact assembly structure, and miniaturization of the motor is better realized. Further, the bracket 7 is provided with a ball groove 12 for receiving the ball 11. A spacer 13 is adhered to the FPC coil 3 for carrying the balls 11. Therefore, in the process of anti-shake, the roller can only rotate in the ball groove 12, and the displacement of the PCB 2 is realized through the sliding fit of the gasket 13 on the FPC coil 3 and the ball 11, so that the displacement capacity is well ensured by the magnetic attraction between the metal magnetic piece and the magnet 4 through the limit of the ball 11 in the optical axis direction, and the anti-shake effect is ensured. Furthermore, the spacer 13 covers the displacement surface of the PCB board 2, thereby avoiding damage to the FPC coil 3 during displacement compensation. Therefore, the movement limit is realized through the magnetic ball limit mode, so that the inner plate 101 is kept parallel to the plane where the outer plate 102 is positioned, the stability perpendicular to the optical axis is kept, and the accuracy and stability of displacement anti-shake are further ensured.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that the above-mentioned preferred embodiment should not be construed as limiting the utility model, and the scope of the utility model should be defined by the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420331102.0U CN221948024U (en) | 2024-02-22 | 2024-02-22 | A motor with low magnetic attraction resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420331102.0U CN221948024U (en) | 2024-02-22 | 2024-02-22 | A motor with low magnetic attraction resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221948024U true CN221948024U (en) | 2024-11-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420331102.0U Active CN221948024U (en) | 2024-02-22 | 2024-02-22 | A motor with low magnetic attraction resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221948024U (en) |
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2024
- 2024-02-22 CN CN202420331102.0U patent/CN221948024U/en active Active
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