Sensor driving apparatus

Abstract

The present application provides a sensor driving apparatus (100), comprising: a housing (1); a sensor module (4); an elastic support assembly (2); driving coils (5); and magnetic steels (6). There are multiple groups of driving coils (5), and the multiple groups of driving coils (5) are spaced apart from one another. Each group of driving coils (5) comprises two coils that are perpendicular to each other. The driving directions of the two coils in each group are respectively perpendicular to an optical axis and facing the sensor module (4) and perpendicular to an optical axis and facing away from the sensor module (4). The orthographic projection of one of the two coils in each group in the direction toward the other coil is at least partially located in the other coil. There are multiple groups of driving magnetic steels (6), and the multiple groups of driving magnetic steels (6) are spaced apart from one another. Each group of driving magnetic steels (6) corresponds to and is spaced apart from each group of driving coils (5). The plurality of groups of driving magnetic steels (6) interact with the plurality of groups of driving coils (5) to drive the sensor module (4) to move in a direction perpendicular to the optical axis. Compared with the related art, the sensor driving apparatus (100) of the present application has a large rotational torque, a good driving effect, and good anti-shake performance.

Description

Sensor driving device TECHNICAL FIELD

[0001] The utility model relates to a kind of driving devices, in particular to a kind of sensor driving device. BACKGROUND

[0002] With the development of camera technology, sensor driving device is widely used in various camera devices. The combination of sensor driving device with various portable electronic devices such as mobile phones, cameras, computers and the like is also favored by consumers. TECHNICAL PROBLEM

[0003] The driving mechanism of the related art sensor driving device is usually formed by a driving coil and a magnetic steel. The support frame is supported on the base, the sensor module is arranged in the accommodation space of the support frame, the sensor module is suspended in the accommodation space by the elastic support assembly, the magnetic steel is fixed on the base, the driving coil is fixed on the elastic support assembly, and when the driving coil is applied with current, the driving coil generates an electromagnetic field with the magnetic steel. The driving coil is subjected to the Lorentz force of the electromagnetic field, and the driving coil moves 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 related art sensor driving device, the driving coil mainly provides rotational driving force by relying on the upper and lower corresponding 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. TECHNICAL SOLUTION

[0006] The utility model wants to solve the technical problem to provide a kind of sensor driving device, rotational torque is big, driving effect is good, and anti-shake performance is good.

[0007] To solve the above technical problems, the utility model provides a kind of sensor driving device, it includes:

[0008] The shell has an accommodation space, and is provided with a through hole for communicating the accommodation space with the outside;

[0009] The sensor module is accommodated in the accommodation space and opposite to the through hole;

[0010] The elastic support assembly is fixed to the inner side of the shell and suspends the sensor module in the accommodation space;

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

[0012] a driving magnetic steel fixed to the housing and spaced opposite to the driving coil; the driving coil interacts with the driving magnetic steel and drives the elastic support assembly to move along a direction perpendicular to the optical axis of the sensor module, so as to drive the sensor module to move synchronously;

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

[0014] the driving magnetic steel comprises a plurality of groups, the groups of the driving magnetic steel are spaced from each other, each group of the driving magnetic steel corresponds to and is spaced from each group of the driving coil, and the groups of the driving magnetic steel interact with the groups of the driving coil to drive the sensor module to move along a direction perpendicular to the optical axis.

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

[0016] Preferably, the groups of the driving coil comprise a first group of driving coils, a second group of driving coils, a third group of driving coils and a fourth group of driving coils fixed to the circumferential side of the sensor module respectively; the first group of driving coils and the second group of driving coils are spaced side by side on one side of the sensor module respectively, the third group of driving coils and the fourth group of driving coils are spaced side by side on the other side of the sensor module respectively, and the first group of driving coils and the fourth group of driving coils are arranged diagonally.

[0017] the driving magnetic steel comprises a first driving magnetic steel, a second driving magnetic steel, a third driving magnetic steel and a fourth driving magnetic steel fixed to the housing respectively; the first driving magnetic steel, the second driving magnetic steel, the third driving magnetic steel and the fourth driving magnetic steel are arranged on the circumferential side of the sensor module and spaced from each other; and the first driving magnetic steel, the second driving magnetic steel, the third driving magnetic steel and the fourth driving magnetic steel 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 respectively, and drive the sensor module to move.

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

[0019] one of the first group of drive coils is parallel to one of the third group of drive coils and has opposite driving direction, and the other of the first group of drive coils is parallel to the other of the third group of drive coils and has same driving direction;

[0020] one of the first group of drive coils is parallel to one of the fourth group of drive coils and has opposite driving direction, and the other of the first group of drive coils is parallel to the other of the fourth group of drive coils and has opposite driving direction.

[0021] Preferably, the elastic supporting assembly comprises a resilient arm arranged in the housing, connecting portions extending from opposite sides of the resilient arm to inner sides thereof, a movable portion fixed between the two connecting portions, a first fixing portion recessed from the other opposite sides of the resilient 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 housing.

[0022] Preferably, the sensor driving device further comprises a first anti-collision block and a second anti-collision block, the first anti-collision block and the second anti-collision block are respectively located at the two connecting portions, and the first anti-collision block and the second anti-collision block respectively abut against the movable portion away from the side of the resilient arm.

[0023] Preferably, the sensor driving device further comprises a first damping member and a second damping member, 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 accommodation space; the elastic supporting assembly is fixed to the side of the bottom cover close to the upper cover.

[0025] The first drive magnetic steel, the second drive magnetic steel, the third drive magnetic steel and the fourth drive magnetic steel each are provided with two magnetic steels, the two magnetic steels are respectively fixed to the bottom cover and the upper cover, and the two magnetic steels are respectively arranged at two sides of the first group of drive coils, the second group of drive coils, the third group of drive coils and the fourth group of drive coils.

[0026] Preferably, the upper cover comprises an upper cover body fixed to the bottom cover in a rectangular shape, a support portion extended 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 oppositely bent and extended from one 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 the conductive member is electrically connected with the elastic support assembly, and the other end of the conductive member is used for connecting an external device. Advantages

[0028] Compared with the prior art, in the sensor driving device, the driving coil is fixed to the sensor module; the driving coil comprises multiple groups, the multiple groups of driving coils are spaced apart from each other, each group of driving coils comprises two coils perpendicular to each other, the driving directions of the two coils of each group are respectively perpendicular to the optical axis and face the sensor module and are perpendicular to the optical axis and away from the sensor module, and the normal projection of one of the two coils of each group in the direction of the other coil is at least partially located in the other coil; the driving magnetic steel comprises multiple groups, the multiple groups of driving magnetic steels are spaced apart from each other, each group of driving magnetic steels corresponds to and is spaced apart from each group of driving coils; the multiple groups of driving magnetic steels interact with the multiple groups of driving coils to drive the sensor module to move in a direction perpendicular to the optical axis; under the condition of meeting the same BL condition, the driving coil pair design can obtain greater rotary torque, and the multiple groups of driving coils can be connected in series to obtain greater rotary thrust through the power amplifier design. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced below, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating creative labor, wherein:

[0030] Fig. 1 is a three-dimensional structure schematic diagram of the sensor driving device of the utility model;

[0031] Fig. 2 is an overall exploded structure schematic diagram of the sensor driving device of the utility model;

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

[0033] Fig. 4 is a sectional view along line A-A in Fig. 1.

[0034] Wherein, 100, sensor driving device, 1, shell, 11, bottom cover, 12, upper cover, 121, upper cover body, 122, support part, 123, second fixing part, 124, third fixing part, 13, through hole, 2, elastic support assembly, 21, elastic arm, 22, mounting part, 23, connecting part, 24, movable part, 25, first fixing part, 3, conductive piece, 4, sensor module, 5, drive coil, 51, first group drive coil, 52, second group drive coil, 53, third group drive coil, 54, fourth group drive coil, 6, drive magnetic steel, 61, first drive magnetic steel, 62, second drive magnetic steel, 63, third drive magnetic steel, 64, fourth drive magnetic steel, 7, first anti-collision block, 8, second anti-collision block, 9, first damping piece, 10, second damping piece. Embodiments of the present application

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0036] Embodiment one

[0037] Please refer to Figs. 1-4, a sensor driving device 100 is provided, which comprises a shell 1, an elastic support assembly 2, a sensor module 4, a drive coil 5 and a drive magnetic steel 6.

[0038] The shell 1 has a receiving space and is provided with a through hole 13 for communicating the receiving space with the outside.

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

[0040] The elastic support assembly 2 is fixed to the inner side of the shell 1 and suspends the sensor module 4 in the receiving space. The sensor module 4 is elastically fixed by the elastic support assembly 2, and the drive coil 5 and the drive magnetic steel 6 are driven to realize the anti-shake of the sensor module 4.

[0041] The drive coil 5 is fixed to the sensor module 4; the drive magnetic steel 6 is fixed to the shell 1 and is opposite to the drive coil 5; the drive coil 5 and the drive magnetic steel 6 interact and drive the elastic support assembly 2 to move along the direction perpendicular to the optical axis of the sensor module 4, so as to drive the sensor module 4 to move synchronously.

[0042] The driving coil 5 comprises a plurality of groups, the groups of the driving coil 5 are spaced from each other, each group of the driving coil 5 comprises two coils perpendicular to each other, the driving directions of the two coils of each group are perpendicular to the optical axis and respectively towards and away from the sensor module 4, and the orthographic projection of one of the two coils of each group in the direction of the other coil is at least partially located in the other coil.

[0043] The driving magnetic steel 6 comprises a plurality of groups, the groups of the driving magnetic steel 6 are spaced from each other, each group of the driving magnetic steel 6 corresponds to and is spaced from each group of the driving coil 5; the groups of the driving magnetic steel 6 interact with the groups of the driving coil 5 to drive the sensor module 4 to move in the direction perpendicular to the optical axis. In this way, under the condition of meeting the same BL, the driving coil 5 can obtain greater rotational torque, and the groups of the driving coil 5 can be connected in series through the power amplifier to obtain greater rotational thrust.

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

[0045] In the embodiment, the elastic support assembly 2 is a rectangular structure, and the driving coil 5 is located at each of the four corner positions of the rectangular structure. This facilitates the driving coil 5 to obtain greater rotational torque under the condition of meeting the same BL.

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

[0047] The driving magnetic steel 6 includes a first driving magnetic steel 61, a second driving magnetic steel 62, a third driving magnetic steel 63 and a fourth driving magnetic steel 64 fixed to the shell 1 respectively; the first driving magnetic steel 61, the second driving magnetic steel 62, the third driving magnetic steel 63 and the fourth driving magnetic steel 64 are arranged at the periphery of the sensor module 4 and spaced from each other; the first driving magnetic steel 61, the second driving magnetic steel 62, the third driving magnetic steel 63 and the fourth driving magnetic steel 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 driving coil 5 can obtain greater rotational torque, and four groups of driving coils 5 can be used in series through a power amplifier design to obtain greater rotational thrust.

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

[0049] One of the first group of driving coils 51 and one of the third group of driving coils 53 are parallel to each other and have opposite driving directions, and the other of the first group of driving coils 51 and the other of the third group of driving coils 53 are parallel to each other and have the same driving direction.

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

[0051] In the embodiment, the elastic support assembly 2 includes a resilient arm 21 arranged in the shell, a connecting portion 23 extending from the opposite sides of the resilient arm 21 to the inner side thereof, a movable portion 24 fixed between the two connecting portions 23, a first fixing portion 25 recessed from the other opposite sides of the resilient arm 21 respectively, 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] The sensor driving device 100 further comprises a first anti-collision block 7 and a second anti-collision block 8, which are arranged at 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 connection portions 23, and the first anti-collision block 7 and the second anti-collision block 8 respectively abut against the movable portion 24 away from one side of 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 improve the safety.

[0053] The sensor driving device 100 further comprises a first damping member 9 and a second damping member 10, both ends of the first damping member 9 are respectively fixed to the housing 1 and the first anti-collision block 7, and both ends of the second damping member 10 are respectively fixed to the housing 1 and the second anti-collision block 8. The anti-collision effect of the anti-collision block is improved.

[0054] The housing 1 comprises a bottom cover 11 and an upper cover 12 fixed to the bottom cover 11 and together enclosing the accommodation space, and the elastic support assembly 2 is fixed to one 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 magnetic steel 61, the second driving magnetic steel 62, the third driving magnetic steel 63 and the fourth driving magnetic steel 64 are each provided with two magnetic steels, the two magnetic steels are respectively fixed to the bottom cover 11 and the upper cover 12, and the two magnetic steels are respectively arranged at opposite 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] The upper cover 12 comprises a rectangular upper cover body 121 fixed to the bottom cover 11, a support portion 122 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 oppositely bent and extended from one 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 at one side of the second fixing portion 123 and the third fixing portion 124 close to the bottom cover 11.

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

[0058] The sensor driving device 100 further comprises a conductive member 3, one end of the conductive member 3 is electrically connected with the elastic support assembly 2, and the other end of the conductive member 3 is used for connecting an external device.

[0059] Compared with the prior art, in the sensor driving device, the driving coils are fixed on the sensor module; 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 directions of the two coils of each group are respectively perpendicular to the optical axis and respectively face and are away from the sensor module, the normal projection of one of the two coils of each group in the direction of the other coil is at least partially located in the other coil; the driving magnetic steels include multiple groups, the multiple groups of driving magnetic steels are spaced from each other, and each group of driving magnetic steels corresponds to and is spaced from each group of driving coils; the multiple groups of driving magnetic steels interact with the multiple groups of driving coils to drive the sensor module to move in the direction perpendicular to the optical axis; under the condition of meeting the same BL, the driving coil pair design can obtain greater rotary torque, and the multiple groups of driving coils can be connected in series to obtain greater rotary thrust through the power amplifier design.

[0060] The above only describes the implementation manners of the utility model, and it should be noted that, for those skilled in the art, improvements can be made without departing from the creative concept of the utility model, but these all belong to the protection scope of the utility model.

Claims

1. A sensor driving device, comprising: a housing having a receiving space and a through hole for connecting the receiving space with the outside; a sensor module received in the receiving space and opposite to the through hole; a resilient supporting assembly fixed to the inner side of the housing and suspending the sensor module in the receiving space; a driving coil fixed to the sensor module; and a driving magnetic steel fixed to the housing and spaced apart from the driving coil, the driving coil and the driving magnetic steel interact with each other and drive the resilient supporting assembly to move along a direction perpendicular to the optical axis of the sensor module, so as to drive the sensor module to move synchronously, characterized in that: the driving coil comprises a plurality of groups of driving coils, the groups of driving coils are spaced apart from each other, each group of driving coils comprises two coils perpendicular to each other, the driving directions of the two coils of each group are respectively perpendicular to the optical axis and towards the sensor module and perpendicular to the optical axis and away from the sensor module, and the orthographic projection of one of the two coils of each group in the direction of the other coil is at least partially located in the other coil; the driving magnetic steel comprises a plurality of groups of driving magnetic steels, the groups of driving magnetic steels are spaced apart from each other, each group of driving magnetic steels corresponds to and is spaced apart from each group of driving coils; the groups of driving magnetic steels and the groups of driving coils interact with each other to drive the sensor module to move along a direction perpendicular to the optical axis. the orthographic projection of one of the two coils of each group in the direction of the other coil is flush with the other coil.

2. The sensor driving device according to claim 1, wherein the plurality of groups of driving coils comprises a first group of driving coils, a second group of driving coils, a third group of driving coils and a fourth group of driving coils fixed to the circumferential side of the sensor module respectively, the first group of driving coils and the second group of driving coils are spaced apart side by side on one side of the sensor module respectively, the third group of driving coils and the fourth group of driving coils are spaced apart side by side on the other side of the sensor module respectively, and the first group of driving coils and the fourth group of driving coils are arranged diagonally; 3. The sensor driving device according to claim 1, wherein the driving magnetic steel comprises a first driving magnetic steel, a second driving magnetic steel, a third driving magnetic steel and a fourth driving magnetic steel fixed to the housing respectively; the first driving magnetic steel, the second driving magnetic steel, the third driving magnetic steel and the fourth driving magnetic steel are arranged on the circumferential side of the sensor module and spaced apart from each other; the first driving magnetic steel, the second driving magnetic steel, the third driving magnetic steel and the fourth driving magnetic steel 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 respectively, and drive the sensor module to move. one of the coils of the first group of driving coils and one of the coils of the second group of driving coils are parallel to each other and have the same driving direction, and the other coil of the first group of driving coils and the other coil of the second group of driving coils are flush with each other and have opposite driving directions.

4. The sensor driving device according to claim 3, wherein ​ One of the coils of the first group of drive coils is horizontally aligned with one of the coils of the third group of drive coils and has opposite driving directions, and the other coil of the first group of drive coils is horizontally aligned with the other coil of the third group of drive coils and has the same driving direction. One of the coils of the first group of drive coils is horizontally aligned with one of the coils of the fourth group of drive coils and has opposite driving directions, and the other coil of the first group of drive coils is horizontally aligned with the other coil of the fourth group of drive coils and has opposite driving directions.

5. The sensor driving device according to claim 3, wherein The elastic support assembly comprises a resilient arm arranged in the housing, connecting portions extending from opposite sides of the resilient arm to inner sides thereof, a movable portion fixed between the two connecting portions, a first fixing portion recessed from the other opposite sides of the resilient 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 housing.

6. The sensor driving device according to claim 5, wherein The sensor driving device further comprises first and second anti-collision blocks, which are respectively located at the two connecting portions and abut against the movable portion away from the resilient arm.

7. The sensor drive apparatus according to claim 6, wherein The sensor driving device further comprises first and second damping members, 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, wherein The housing comprises a bottom cover and an upper cover fixed to the bottom cover and together enclosing the accommodation space; the elastic support assembly is fixed to a side of the bottom cover close to the upper cover. The first, second, third and fourth drive magnetic steels are each provided with two magnetic steels, the two magnetic steels are respectively fixed to the bottom cover and the upper cover, and the two magnetic steels are respectively arranged on two sides of the first, second, third and fourth groups of drive coils.

9. The sensor driving device according to claim 8, characterized in that, The upper cover comprises a rectangular upper cover body fixed to the bottom cover, a support portion extending from an end of the upper cover body away from the bottom cover along a side of the sensor module, and second and third fixing portions 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 and second damping members are respectively arranged on a side of the second and third fixing portions close to the bottom cover.

10. The sensor driving device according to claim 1, wherein The sensor driving device further comprises a conductive member, one end of the conductive member is electrically connected to the elastic support assembly, and the other end of the conductive member is used for connecting an external device.

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