Sensor driving device

Abstract

The utility model provides a sensor driving device. The sensor driving device comprises a housing; a sensor module and an elastic support assembly; a driving coil and magnetic steel; the number of the driving coils is multiple, the multiple sets of driving coils are mutually spaced, each set of driving coils comprises two coils which are perpendicular to each other, and the driving directions of the two coils of each set are perpendicular to the optical axis and face the sensor module and perpendicular to the optical axis and deviate from the sensor module respectively. The orthographic projection of one of the two coils in each group towards the direction of the other coil is at least partially positioned in the other coil; the driving magnetic steel comprises a plurality of groups which are mutually spaced, and each group of driving magnetic steel corresponds to each group of driving coils and is spaced from each group of driving coils. The multiple sets of driving magnetic steel and the multiple sets of driving coils interact to drive the sensor module to move in the direction perpendicular to the optical axis. Compared with the prior art, the sensor driving device is large in rotating torque, good in driving effect and good in anti-shake performance.

Description

[Technical field]

[0001] The utility model relates to a driving device, in particular to a sensor driving device. [Background technology]

[0002] With the development of camera technology, sensor driving devices are widely used in various camera devices. The combination of sensor driving devices and various portable electronic devices such as mobile phones, cameras, computers, etc. is even more popular among consumers.

[0003] The driving mechanism of the sensor driving device in the related technology is usually composed of a driving coil and a magnetic steel assembly to form a driving structure, a supporting frame is supported on a base, a sensor module is arranged in a receiving space of the supporting frame, and the sensor module is suspended in the receiving space by an elastic supporting component. The magnetic steel is fixed to the base, and the driving coil is fixed to the elastic supporting component. When current is applied through the driving coil, an electromagnetic field is generated by the driving coil and the magnetic steel. The driving coil is acted upon by the Lorentz force of the electromagnetic field, and the driving coil is driven to move in a direction perpendicular to the optical axis of the sensor module, thereby driving the sensor module to achieve anti-shake performance.

[0004] However, in the sensor driving device of the related art, since the driving coil mainly provides the rotational driving force by relying on two corresponding upper and lower driving coils, the rotational torque is small, the driving effect is poor, and the anti-shake effect is not good.

[0005] Therefore, it is necessary to provide a new sensor driving device to solve the above problems. [Utility Model Content]

[0006] The technical problem to be solved by the utility model is to provide a sensor driving device with large rotation torque, good driving effect and good anti-shake performance.

[0007] In order to solve the above technical problems, the utility model provides a sensor driving device, which includes:

[0008] A shell having a receiving space and a through hole connecting the receiving space with the outside;

[0009] A sensor module, the sensor module is accommodated in the accommodation space and directly faces the through hole;

[0010] An elastic support component, the elastic support component is fixed to the inner side of the housing and suspends the sensor module in the receiving space;

[0011] a driving coil, wherein the driving coil is fixed to the sensor module; and

[0012] A driving magnet, which is fixed to the housing and spaced apart from the driving coil; the driving coil interacts with the driving magnet and drives the elastic support assembly to move in a direction perpendicular to the optical axis of the sensor module, so as to drive the sensor module to move synchronously;

[0013] The driving coils include a plurality of groups, the plurality of groups of driving coils are spaced from each other, each group of driving coils includes two coils perpendicular to each other, the driving directions of the two coils in each group are respectively perpendicular to the optical axis toward the sensor module and perpendicular to the optical axis away from the sensor module, and the orthographic projection of one of the two coils in each group toward the direction of the other coil is at least partially located within the other coil;

[0014] The driving magnets include multiple groups, the multiple groups of driving magnets are spaced apart from each other, and each group of driving magnets corresponds to and is spaced apart from each group of driving coils; the multiple groups of driving magnets interact with the multiple groups of driving coils to drive the sensor module to move in a direction perpendicular to the optical axis.

[0015] Preferably, the orthographic projection of one of the two coils in each group in the direction of the other coil is flush with the other coil.

[0016] Preferably, the plurality of groups of drive coils include a first group of drive coils, a second group of drive coils, a third group of drive coils and a fourth group of drive coils respectively fixed on the circumferential side of the sensor module; the first group of drive coils and the second group of drive coils are respectively spaced side by side on one side of the sensor module, the third group of drive coils and the fourth group of drive coils are respectively spaced side by side on the other side of the sensor module, and the first group of drive coils and the fourth group of drive coils are diagonally arranged;

[0017] The driving magnet includes a first driving magnet, a second driving magnet, a third driving magnet and a fourth driving magnet respectively fixed on the shell; the first driving magnet, the second driving magnet, the third driving magnet and the fourth driving magnet are arranged at intervals on the peripheral side of the sensor module; the first driving magnet, the second driving magnet, the third driving magnet and the fourth driving magnet respectively interact with the first group of driving coils, the second group of driving coils, the third group of driving coils and the fourth group of driving coils, and drive the sensor module to move.

[0018] Preferably, one coil of the first group of driving coils and one coil of the second group of driving coils are parallel to each other and have the same driving direction, and another coil of the first group of driving coils and another coil of the second group of driving coils are aligned with each other and have opposite driving directions;

[0019] One coil of the first group of driving coils and one coil of the third group of driving coils are aligned with each other and have opposite driving directions, and another coil of the first group of driving coils and another coil of the third group of driving coils are parallel to each other and have the same driving direction;

[0020] One coil of the first group of drive coils is parallel to one coil of the fourth group of drive coils and has opposite driving directions, and another coil of the first group of drive coils is parallel to another coil of the fourth group of drive coils and has opposite driving directions.

[0021] Preferably, the elastic support assembly includes an elastic arm arranged in the shell, a connecting portion extending from opposite sides of the elastic arm toward the inner side thereof, a movable portion fixed between the two connecting portions, a first fixing portion formed by depressions on the other opposite sides of the elastic arm, and a mounting portion fixed to a side of the movable portion away from the sensor module; the sensor module is fixed to the mounting portion, and the first fixing portion is fixed to the shell.

[0022] Preferably, the sensor driving device further includes a first anti-collision block and a second anti-collision block, wherein the first anti-collision block and the second anti-collision block are respectively located at the two connecting parts, and the first anti-collision block and the second anti-collision block respectively abut against the movable part at one side away from the elastic arm.

[0023] Preferably, the sensor driving device further includes a first damping member and a second damping member, wherein two ends of the first damping member are respectively fixed to the housing and the first anti-collision block, and two ends of the second damping member are respectively fixed to the housing and the second anti-collision block.

[0024] Preferably, the housing comprises a bottom cover and an upper cover fixed to the bottom cover and together enclosing the receiving space; the elastic support assembly is fixed to a side of the bottom cover close to the upper cover;

[0025] The first driving magnet, the second driving magnet, the third driving magnet and the fourth driving magnet are respectively provided with two magnets, the two magnets are respectively fixed to the bottom cover and the upper cover, and the two magnets are respectively spaced apart on both sides of the first group of driving coils, the second group of driving coils, the third group of driving coils and the fourth group of driving coils.

[0026] Preferably, the upper cover includes a rectangular upper cover body fixed to the bottom cover, a support portion formed by extending from one end of the upper cover body away from the bottom cover along one side of the sensor module, and a second fixing portion and a third fixing portion formed by relatively bending and extending from a side of the support portion close to the bottom cover; the through hole is formed in the support portion, and the first damping member and the second damping member are respectively arranged on one side of the second fixing portion and the third fixing portion close to the bottom cover.

[0027] Preferably, the sensor driving device further comprises a conductive member, one end of which is electrically connected to the elastic supporting assembly, and the other end of which is used to connect to an external device.

[0028] Compared with the related art, in the sensor driving device of the utility model, the driving coil is fixed to the sensor module; the driving coil includes a plurality of groups, the plurality of groups of driving coils are spaced from each other, each group of driving coils includes two coils perpendicular to each other, the driving directions of the two coils in each group are respectively perpendicular to the optical axis toward the sensor module and perpendicular to the optical axis away from the sensor module, and the positive projection of one of the two coils in each group in the direction of the other coil is at least partially located in the other coil; the driving magnets include a plurality of groups, the plurality of groups of driving magnets are spaced from each other, each group of driving magnets corresponds to and is spaced from each group of driving coils; the plurality of groups of driving magnets interact with the plurality of groups of driving coils to drive the sensor module to move in a direction perpendicular to the optical axis; under the condition of satisfying the same BL condition, the top-to-top design of the driving coils can obtain a larger rotational torque, and the plurality of groups of driving coils can be connected in series to obtain a larger rotational thrust through the power amplifier design.

Brief Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0030] Figure 1 It is a three-dimensional structural schematic diagram of the sensor driving device of the utility model;

[0031] Figure 2 This is a schematic diagram of the overall exploded structure of the sensor drive device of the utility model;

[0032] Figure 3 This is a schematic diagram of the driving force direction of the driving coil of the utility model;

[0033] Figure 4 For along Figure 1 Cross-sectional view along line AA.

[0034] Among them, 100, sensor driving device, 1, shell, 11, bottom cover, 12, upper cover, 121, upper cover body, 122, support part, 123, second fixed part, 124, third fixed part, 13, through hole, 2, elastic support component, 21, elastic arm, 22, mounting part, 23, connecting part, 24, movable part, 25, first fixed part, 3, conductive part, 4, sensor module, 5, driving coil, 51, first group of driving coils, 52, second group of driving coils, 53, third group of driving coils, 54, fourth group of driving coils, 6, driving magnet, 61, first driving magnet, 62, second driving magnet, 63, third driving magnet, 64, fourth driving magnet, 7, first anti-collision block, 8, second anti-collision block, 9, first damping member, 10, second damping member. [Specific implementation method]

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Embodiment 1

[0037] See also Figure 1-Figure 4 As shown, a sensor driving device 100 is provided, which includes a housing 1, an elastic supporting component 2, a sensor module 4, a driving coil 5 and a driving magnet 6.

[0038] The housing 1 has a receiving space and is provided with a through hole 13 connecting the receiving space with the outside; the through hole 13 facilitates the corresponding installation of the sensor module 4.

[0039] The sensor module 4 is received in the receiving space and faces the through hole 13 .

[0040] The elastic support component 2 is fixed to the inner side of the housing 1, and the sensor module 4 is suspended in the receiving space. The sensor module 4 is elastically fixed by the elastic support component 2, and the sensor module 4 is anti-shake by the mutual driving of the driving coil 5 and the driving magnet 6.

[0041] The driving coil 5 is fixed to the sensor module 4; the driving magnet 6 is fixed to the shell 1 and is spaced apart from the driving coil 5; the driving coil 5 interacts with the driving magnet 6 and drives the elastic support component 2 to move in a direction perpendicular to the optical axis of the sensor module 4, so as to drive the sensor module 4 to move synchronously.

[0042] In this embodiment, the drive coil 5 includes multiple groups, and the multiple groups of drive coils 5 are spaced apart from each other. Each group of drive coils 5 includes two coils perpendicular to each other. The driving directions of the two coils in each group are respectively perpendicular to the optical axis toward the sensor module 4 and perpendicular to the optical axis away from the sensor module 4. The positive projection of one of the two coils in each group in the direction of the other coil is at least partially located inside the other coil.

[0043] The driving magnetic steel 6 includes multiple groups, and the multiple groups of driving magnetic steel 6 are spaced from each other. Each group of driving magnetic steel 6 corresponds to and is spaced from each group of driving coils 5. Multiple groups of driving magnetic steel 6 interact with multiple groups of driving coils 5 to drive the sensor module 4 to move in a direction perpendicular to the optical axis. In this way, under the same BL condition, the top-to-top design of the driving coils 5 can obtain a larger rotation torque, and multiple groups of driving coils 5 can be connected in series to obtain a larger rotation thrust through the power amplifier design.

[0044] In this embodiment, the orthographic projection of one of the two coils in each group in the direction of the other coil is flush with the other coil.

[0045] In this embodiment, the elastic support assembly 2 is a rectangular structure, and the drive coils 5 are respectively located at the four corners of the rectangular structure, so that under the same BL condition, the top-to-top design of the drive coils 5 can obtain a larger rotation torque.

[0046] In this embodiment, the multiple groups of drive coils 5 include a first group of drive coils 51, a second group of drive coils 52, a third group of drive coils 53 and a fourth group of drive coils 54, which are respectively fixed on the circumferential side of the sensor module 4; the first group of drive coils 51 and the second group of drive coils 52 are respectively spaced side by side on one side of the sensor module 4, the third group of drive coils 53 and the fourth group of drive coils 54 are respectively spaced side by side on the other side of the sensor module 4, and the first group of drive coils 51 and the fourth group of drive coils 54 are diagonally arranged.

[0047] The driving magnet 6 includes a first driving magnet 61, a second driving magnet 62, a third driving magnet 63 and a fourth driving magnet 64 respectively fixed to the housing 1; the first driving magnet 61, the second driving magnet 62, the third driving magnet 63 and the fourth driving magnet 64 are arranged at intervals on the peripheral side of the sensor module 4; the first driving magnet 61, the second driving magnet 62, the third driving magnet 63 and the fourth driving magnet 64 interact with the first group of driving coils 51, the second group of driving coils 52, the third group of driving coils 53 and the fourth group of driving coils 54 respectively, and drive the sensor module 4 to move. Under the same BL condition, the top-to-top design of the driving coils 5 can obtain a larger rotation torque, and the four groups of driving coils 5 can be connected in series to obtain a larger rotation thrust through the power amplifier design.

[0048] In this embodiment, one coil of the first group of drive coils 51 and one coil of the second group of drive coils 52 are parallel to each other and have the same driving direction, and another coil of the first group of drive coils 51 and another coil of the second group of drive coils 52 are aligned with each other and have opposite driving directions.

[0049] One coil of the first group of drive coils 51 and one coil of the third group of drive coils 53 are aligned with each other and driven in opposite directions, and another coil of the first group of drive coils 51 and another coil of the third group of drive coils 53 are parallel to each other and driven in the same direction.

[0050] One coil of the first group of drive coils 51 and one coil of the fourth group of drive coils 54 are parallel to each other and have opposite driving directions, and another coil of the first group of drive coils 51 and another coil of the fourth group of drive coils 54 are parallel to each other and have opposite driving directions.

[0051] In this embodiment, the elastic support assembly 2 includes an elastic arm 21 arranged in the shell, a connecting portion 23 extending from the opposite sides of the elastic arm 21 toward the inner side thereof, a movable portion 24 fixed between the two connecting portions 23, a first fixing portion 25 formed by depressions on the other opposite sides of the elastic arm 21, and a mounting portion 22 fixed to the side of the movable portion 24 away from the sensor module 4; the sensor module 4 is fixed to the mounting portion 22, and the first fixing portion 25 is fixed to the shell.

[0052] In this embodiment, the sensor driving device 100 further includes a first anti-collision block 7 and a second anti-collision block 8, and the first anti-collision block 7 and the second anti-collision block 8 are arranged at intervals on opposite sides of the sensor module 4. The first anti-collision block 7 and the second anti-collision block 8 are respectively located at the two connecting parts 23, and the first anti-collision block 7 and the second anti-collision block 8 are respectively abutted against the movable part 24 on one side away from the elastic arm 21. The first anti-collision block 7 and the second anti-collision block 8 are used to limit the rotation position of the sensor module 4, so as to prevent the sensor module 4 from rotating too much, and the safety is high.

[0053] In this embodiment, the sensor driving device 100 further includes a first damping member 9 and a second damping member 10, wherein two ends of the first damping member 9 are respectively fixed to the housing 1 and the first anti-collision block 7, and two ends of the second damping member 10 are respectively fixed to the housing 1 and the second anti-collision block 8, thereby improving the anti-collision effect of the anti-collision block.

[0054] In this embodiment, the housing 1 includes a bottom cover 11 and an upper cover 12 fixed to the bottom cover 11 and together enclosing the receiving space, and the elastic support assembly 2 is fixed to a side of the bottom cover 11 close to the upper cover 12. The through hole 13 is formed in the upper cover 12.

[0055] The first driving magnet 61, the second driving magnet 62, the third driving magnet 63 and the fourth driving magnet 64 are respectively provided with two magnets, the two magnets are respectively fixed to the bottom cover 11 and the upper cover 12, and the two magnets are respectively spaced apart on both sides of the first group of driving coils 51, the second group of driving coils 52, the third group of driving coils 53 and the fourth group of driving coils 54.

[0056] In this embodiment, the upper cover 12 includes a rectangular upper cover body 121 fixed to the bottom cover 11, a support portion 122 formed by extending from one end of the upper cover body 121 away from the bottom cover 11 along one side of the sensor module 4, and a second fixing portion 123 and a third fixing portion 124 formed by relatively bending and extending from the side of the support portion 122 close to the bottom cover 11; the through hole 13 is formed in the support portion 122, and the first damping member 9 and the second damping member 10 are respectively arranged on the side of the second fixing portion 123 and the third fixing portion 124 close to the bottom cover 11.

[0057] In this embodiment, the sensor driving device 100 further includes a first screw 9 and a second screw 10, the first anti-collision block 7 and the second fixing portion 123 are fixedly connected by the first screw 9, and the second anti-collision block 8 and the third fixing portion 124 are fixedly connected by the second screw 10. The screw fixing effect is good and the assembly is convenient.

[0058] In this embodiment, the sensor driving device 100 further includes a conductive member 3 , one end of which is electrically connected to the elastic supporting assembly 2 , and the other end of which is used to connect to an external device.

[0059] Compared with the related art, in the sensor driving device of the utility model, the driving coil is fixed to the sensor module; the driving coil includes a plurality of groups, the plurality of groups of driving coils are spaced from each other, each group of driving coils includes two coils perpendicular to each other, the driving directions of the two coils in each group are respectively perpendicular to the optical axis toward the sensor module and perpendicular to the optical axis away from the sensor module, and the positive projection of one of the two coils in each group in the direction of the other coil is at least partially located in the other coil; the driving magnets include a plurality of groups, the plurality of groups of driving magnets are spaced from each other, each group of driving magnets corresponds to and is spaced from each group of driving coils; the plurality of groups of driving magnets interact with the plurality of groups of driving coils to drive the sensor module to move in a direction perpendicular to the optical axis; under the condition of satisfying the same BL condition, the top-to-top design of the driving coils can obtain a larger rotational torque, and the plurality of groups of driving coils can be connected in series to obtain a larger rotational thrust through the power amplifier design.

[0060] The above is only an implementation method of the present invention. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements are all within the protection scope of the present invention.

Claims

1. A sensor driving device, comprising: A shell having a receiving space and a through hole connecting the receiving space with the outside; A sensor module, the sensor module is accommodated in the accommodation space and directly faces the through hole; An elastic support component, the elastic support component is fixed to the inner side of the housing and suspends the sensor module in the receiving space; A driving coil, wherein the driving coil is fixed to the sensor module; as well as, A driving magnet is fixed to the housing and spaced opposite to the driving coil; the driving coil interacts with the driving magnet and drives the elastic support component to move in a direction perpendicular to the optical axis of the sensor module to drive the sensor module to move synchronously; characterized in that: The driving coils include multiple groups, the multiple groups of driving coils are spaced from each other, each group of driving coils includes two coils perpendicular to each other, the driving direction of one of the two coils in each group is perpendicular to the optical axis and toward the sensor module, and the driving direction of the other of the two coils in each group is perpendicular to the optical axis and away from the sensor module; the orthographic projection of one of the two coils in each group toward the direction of the other coil is at least partially located within the other coil; The driving magnets include multiple groups, the multiple groups of driving magnets are spaced apart from each other, and each group of driving magnets corresponds to and is spaced apart from each group of driving coils; the multiple groups of driving magnets interact with the multiple groups of driving coils to drive the sensor module to move in a direction perpendicular to the optical axis.

2. The sensor driving device according to claim 1, characterized in that: The orthographic projection of one of the two coils in each group toward the other coil is flush with the other coil.

3. The sensor driving device according to claim 1, characterized in that: The plurality of groups of drive coils include a first group of drive coils, a second group of drive coils, a third group of drive coils and a fourth group of drive coils respectively fixed to the peripheral side of the sensor module; the first group of drive coils and the second group of drive coils are respectively arranged side by side on one side of the sensor module, the third group of drive coils and the fourth group of drive coils are respectively arranged side by side on the other side of the sensor module, and the first group of drive coils and the fourth group of drive coils are arranged diagonally; The driving magnetic steel includes a first driving magnetic steel, a second driving magnetic steel, a third driving magnetic steel and a fourth driving magnetic steel respectively fixed to the housing; The first driving magnetic steel, the second driving magnetic steel, the third driving magnetic steel and the fourth driving magnetic steel are arranged at a circumferential side of the sensor module with intervals between them; The first driving magnet, the second driving magnet, the third driving magnet and the fourth driving magnet respectively interact with the first group of driving coils, the second group of driving coils, the third group of driving coils and the fourth group of driving coils, and drive the sensor module to move.

4. The sensor driving device according to claim 3, characterized in that: One coil of the first group of driving coils and one coil of the second group of driving coils are parallel to each other and have the same driving direction, and another coil of the first group of driving coils and another coil of the second group of driving coils are aligned with each other and have opposite driving directions; One coil of the first group of driving coils and one coil of the third group of driving coils are aligned with each other and have opposite driving directions, and another coil of the first group of driving coils and another coil of the third group of driving coils are parallel to each other and have the same driving direction; One coil of the first group of drive coils is parallel to one coil of the fourth group of drive coils and has opposite driving directions, and another coil of the first group of drive coils is parallel to another coil of the fourth group of drive coils and has opposite driving directions.

5. The sensor driving device according to claim 3, characterized in that: The elastic support assembly includes an elastic arm arranged in the shell, a connecting portion extending inward from opposite sides of the elastic arm, a movable portion fixed between the two connecting portions, a first fixing portion formed by depressions on the other opposite sides of the elastic arm, and a mounting portion fixed to a side of the movable portion away from the sensor module; the sensor module is fixed to the mounting portion, and the first fixing portion is fixed to the shell.

6. The sensor driving device according to claim 5, characterized in that: The sensor driving device further includes a first anti-collision block and a second anti-collision block, wherein the first anti-collision block and the second anti-collision block are respectively located at the two connecting parts, and the first anti-collision block and the second anti-collision block respectively abut against the movable part at one side away from the elastic arm.

7. The sensor driving device according to claim 6, characterized in that: The sensor driving device further includes a first damping member and a second damping member, wherein two ends of the first damping member are respectively fixed to the housing and the first anti-collision block, and two ends of the second damping member are respectively fixed to the housing and the second anti-collision block.

8. The sensor driving device according to claim 7, characterized in that: The housing comprises a bottom cover and an upper cover fixed to the bottom cover and together enclosing the receiving space; the elastic support assembly is fixed to a side of the bottom cover close to the upper cover; The first driving magnet, the second driving magnet, the third driving magnet and the fourth driving magnet are respectively provided with two magnets, the two magnets are respectively fixed to the bottom cover and the upper cover, and the two magnets are respectively spaced apart on both sides of the first group of driving coils, the second group of driving coils, the third group of driving coils and the fourth group of driving coils.

9. The sensor driving device according to claim 8, characterized in that: The upper cover includes a rectangular upper cover body fixed to the bottom cover, a support portion formed by an end of the upper cover body extending along a side of the sensor module away from the bottom cover, and a second fixing portion and a third fixing portion formed by relatively bending and extending a side of the support portion close to the bottom cover; the through hole is formed in the support portion, and the first damping member and the second damping member are respectively arranged on a side of the second fixing portion and the third fixing portion close to the bottom cover.

10. The sensor driving device according to claim 1, characterized in that: The sensor driving device further comprises a conductive member, one end of which is electrically connected to the elastic supporting assembly, and the other end of which is used to connect to an external device.

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