CN219678572U - Anti-shake driving device for camera - Google Patents

Abstract

The utility model belongs to the technical field of camera shooting, and particularly discloses an anti-shake driving device for a camera, which comprises the following components: a mounting base and a frame assembly; the frame assembly is provided with a plurality of rotary frames which are sequentially arranged from outside to inside; the outermost rotating frame is arranged on the mounting seat; the innermost rotary frame is used for installing the camera module; the two adjacent rotating frames are rotationally connected through the rotating shafts, and the SMA driving assembly is adopted to drive the rotating frames to rotate, so that the frame assembly forms a suspension frame capable of fixing and suspending the camera module, a multi-shaft anti-shake structure is formed, the camera module can rotate relative to each rotating shaft, and the anti-shake performance of the camera module is improved; the two adjacent rotating frames are connected through the rotating shaft in a rotating mode, the structure is simpler and more compact, compared with a camera adopting a voice coil motor to drive a rotating angle, the size of the SMA driving assembly is smaller, the size of the combined camera anti-shake driving device is smaller, and the camera anti-shake driving device is suitable for the miniaturization trend of mobile equipment.

Description

Anti-shake driving device for camera

Technical Field

The utility model relates to the technical field of camera shooting, in particular to an anti-shake driving device for a camera.

Background

Along with the development of science and technology and the increasing daily requirement of people on shooting, higher requirements are also put forward on the shooting function of mobile equipment such as mobile phones and tablets, and the anti-shake performance of the mobile equipment is particularly important because the mobile equipment does not have auxiliary equipment such as a stable support and the like during shooting. In order to provide better anti-shake performance, the voice coil motor is currently used for carrying out rotation angle displacement on the camera module in the market, but the volume of the voice coil motor is larger, a plurality of voice coil motors are required to be equipped when multi-axis rotation is carried out, so that the overall volume of the camera module is larger, and the trend of miniaturization of mobile equipment is not adapted.

Disclosure of Invention

The purpose of the utility model is that: the utility model provides a camera anti-shake drive arrangement to use voice coil motor to cooperate the whole bigger technical problem of trend that is not adapted to the miniaturization of mobile device of camera module of anti-shake among the solution prior art.

In order to achieve the above object, the present utility model provides a camera anti-shake driving apparatus, comprising:

a mounting base;

a frame assembly having a plurality of rotating frames sequentially disposed from outside to inside; the outermost rotating frame is arranged on the mounting seat; the innermost rotary frame is used for installing a camera module; two adjacent rotating frames form an anti-shake frame group;

the anti-shake frame group is provided with a rotating shaft and an SMA driving assembly, and the two rotating frames of the anti-shake frame group are rotationally connected through the rotating shaft; the SMA driving assembly is arranged between the two rotating frames of the anti-shake frame group and is used for driving the rotating frames positioned on the inner side to rotate positively or reversely around the rotating shaft.

In some embodiments of the utility model, the SMA drive assembly comprises two drive units; one of the driving units is used for driving the rotating frame positioned on the inner side to rotate positively around the rotating shaft; the other driving unit is used for driving the rotating frame positioned on the inner side to rotate reversely around the rotating shaft.

In some embodiments of the present utility model, the two sides of the rotating frame located at the inner side in the length direction of the rotating shaft are a first driving side and a second driving side, respectively, and the two driving units of the anti-shake frame group are disposed on the first driving side and the second driving side, respectively.

In some embodiments of the present utility model, the driving units each include an inner frame connecting portion, an outer frame connecting portion, and an SMA expansion member; the inner frame connecting part is arranged on the rotating frame positioned on the inner side of the anti-shake frame group; the outer frame connecting part is arranged on the rotating frame positioned at the outer side of the anti-shake frame group, one end of the SMA telescopic piece is connected with the inner frame connecting part, and the other end of the SMA telescopic piece is connected with the outer frame connecting part; the inner frame connecting part and the outer frame connecting part of the same driving unit are respectively positioned at two sides of the rotating shaft.

In some embodiments of the utility model, the two inner frame connecting portions of the two drive units of the SMA drive assembly are disposed on the first and second drive sides of the inner side rotary frame, respectively, and at opposite corners of the inner side rotary frame, respectively.

In some embodiments of the utility model, the inner frame connection has a first connection jaw provided on the inner side-located rotating frame of the anti-shake frame group, the first connection jaw being connected with the SMA extension piece; the outer frame connecting portion is provided with a second connecting clamping jaw which is arranged on the rotating frame outside the anti-shake frame group and connected with the SMA telescopic piece.

In some embodiments of the present utility model, the anti-shake frame set further includes a position identifier and a position sensor; the position mark is arranged on one rotating frame of the anti-shake frame group, and the position sensor is arranged on the other rotating frame of the anti-shake frame group.

In some embodiments of the present utility model, the number of the rotating frames is three, the number of the anti-shake frame groups formed correspondingly is two, and the number of the rotating shafts and the number of the SMA driving assemblies are two; an included angle is formed between the extending directions of the two rotating shafts.

In some embodiments of the present utility model, the three rotating frames are respectively from outside to inside: a first frame, a second frame, a third frame; the first frame is arranged on the mounting seat; the third frame is used for installing a camera module; the two rotating shafts are respectively a first pivot shaft and a second pivot shaft; the second frame is pivoted with the first frame through the first pivot shaft; the third frame is pivoted with the second frame through the second pivot shaft, and the extending direction of the first pivot shaft is perpendicular to the extending direction of the second pivot shaft.

In some embodiments of the utility model, the first pivot is located in the middle of the second frame; the second pivot shaft is positioned in the middle of the third frame.

In some embodiments of the utility model, the first frame is provided with a first limit and a second limit; the first limiting part and the second limiting part are respectively positioned at two sides of the second frame; when the second frame is driven by the SMA driving assembly to positively rotate to a first preset position, the first limiting part is abutted with the second frame; when the second frame is reversely rotated to a second preset position under the drive of the SMA driving assembly, the second limiting part is abutted with the second frame.

In some embodiments of the present utility model, the third frame is provided with a third limit portion and a fourth limit portion, and the third limit portion and the fourth limit portion are respectively disposed at two sides of the third frame; when the third frame positively rotates to a third preset position under the drive of the SMA driving assembly, the third limiting part is abutted with the second frame; when the third frame is reversely rotated to a fourth preset position under the drive of the SMA driving assembly, the fourth limiting part is abutted with the second frame.

The camera anti-shake driving device provided by the utility model has the beneficial effects that: the frame assembly is provided with a plurality of rotating frames which are sequentially arranged from outside to inside, two adjacent rotating frames are rotationally connected through a rotating shaft, and the SMA driving assembly is adopted to drive the rotating frames to rotate, so that the frame assembly forms a suspension frame which can fix and suspend the camera module, a multi-shaft anti-shake structure is formed, the camera module can rotate relative to each rotating shaft, and the anti-shake performance of the camera module is improved; and two adjacent rotating frames are rotationally connected through the rotating shaft, the structure is simpler and more compact, compared with a camera adopting a voice coil motor to drive a rotating angle, the size of the SMA driving assembly is smaller, the size of the combined camera anti-shake driving device is smaller, and the camera anti-shake driving device is suitable for the miniaturization trend of mobile equipment.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic structural diagram of an anti-shake driving device for a camera according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of the camera anti-shake driving device according to the embodiment of the utility model after the upper cover is removed;

FIG. 3 is a schematic view of the mating structure of a mount and frame assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic illustration of an exploded frame assembly according to an embodiment of the present utility model;

FIG. 5 is an exploded view of an anti-shake driving apparatus for a camera according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of the second frame and the third frame according to the embodiment of the present utility model after assembly.

100, a mounting seat; 110. an upper cover; 200. a frame assembly; 210. a rotating frame; 211. a first driving side; 212. a second driving side; 220. a rotating shaft; 221. a first pivot shaft; 222. a second pivot shaft; 230. an SMA drive assembly; 231. a driving unit; 232. an inner frame connecting part; 233. an outer frame connecting part; 234. an SMA telescoping member; 235. a first connecting jaw; 236. a second connecting jaw; 240. a position mark; 250. a position sensor; 260. a first frame; 261. a first limit part; 262. a second limit part; 270. a second frame; 280. a third frame; 281. a third limit part; 282. a fourth limit part; 300. a camera module; 310. a flexible circuit board; 320. and a line interface.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 6, an anti-shake driving device for a camera according to an embodiment of the utility model will be described.

Referring to fig. 1 to 5, an anti-shake driving apparatus for a camera according to an embodiment of the present utility model includes: mount 100, frame assembly 200;

referring to fig. 1 and 5, the mount 100 is a fixture for supporting and connecting the frame assembly 200; to cover and protect the frame assembly 200, the mounting base 100 is coupled with the upper cover 110, and a mounting cavity accommodating the frame assembly 200 is formed between the upper cover 110 and the mounting base 100 to protect the frame assembly 200 from external damage.

Referring to fig. 2 to 5, the frame assembly 200 has a plurality of rotating frames 210 sequentially disposed from outside to inside; the outermost rotating frame 210 is disposed on the mount 100; the innermost rotary frame 210 is used for mounting the camera module 300; adjacent two rotating frames 210 form an anti-shake frame group;

the anti-shake frame group is provided with a rotating shaft 220 and an SMA driving assembly 230, and the two rotating frames 210 of the anti-shake frame group are rotationally connected through the rotating shaft 220; the inner rotary frame 210 positioned in the same anti-shake frame set can rotate around the rotary shaft 220 relative to the other rotary frame 210, and the extension directions of the rotary shafts 220 of each anti-shake frame set are different; the SMA drive assembly 230 is disposed between the two rotating frames 210 of the anti-shake frame group, and the SMA drive assembly 230 is used to drive the rotating frame 210 located on the inner side to rotate forward or backward around the rotation shaft 220. The SMA drive assembly 230 is an SMA (shape memory alloy ) drive that drives the rotating frame 210 to rotate forward or reverse using a retractable shape memory alloy wire (SMA wire that contracts when heated and expands when not energized). The SMA driving assembly 230 of each anti-shake frame set can drive the rotating frame 210 located at the inner side to rotate around the rotating shaft 220, so that the plurality of anti-shake frame sets cooperate to form a suspension frame capable of fixing and suspending the camera module 300, so as to form a multi-axis anti-shake structure, so that the camera module 300 can rotate relative to each rotating shaft 220, and the anti-shake performance of the camera module 300 is improved.

It should be noted that, the SMA driving assembly 230 controls whether the current is turned on or off and controls the magnitude of the energizing current through the connection control terminal, and controls the contracted length of the shape memory alloy wire so as to drive the rotating frame 210 to a corresponding position.

The number of rotating frames 210, the number of rotating shafts 220, and the number of SMA drive assemblies 230 may be determined according to camera requirements of different models. If the number of the rotating frames 210 is two, three, four, etc., the number of the anti-shake frame groups is one, two, three, etc.; the number of corresponding rotation shafts 220 and the number of SMA driving assemblies 230 are the same as the number of anti-shake frame groups, and are the number of rotation frames 210 minus one, i.e., the number of corresponding rotation shafts 220 and the number of SMA driving assemblies 230 are one, two, three, or other natural numbers.

For convenience of explanation, specifically, as shown in fig. 3 and 4, the number of the rotating frames 210 is three, and the number of the corresponding rotating shafts 220 and SMA driving assemblies 230 are two. The three rotating frames 210 are respectively from outside to inside in sequence: a first frame 260, a second frame 270, a third frame 280; the first frame 260 is disposed on the mount 100; the third frame 280 is used for installing the camera module 300; the two rotating shafts 220 are a first pivot shaft 221 and a second pivot shaft 222, respectively; the second frame 270 is pivoted to the first frame 260 through the first pivot shaft 221; the third frame 280 is pivotally connected to the second frame 270 through the second pivot 222. The third frame 280 may be adapted to fit with a commercially available camera module 300 to mount the camera module 300 on the frame assembly 200. It can be understood that, in order to better increase the anti-shake effect, the camera module 300 with X, Y, Z axis linear displacement anti-shake effect can be matched and assembled on the market, so that the five-axis optical anti-shake effect can be achieved.

In order to reduce friction between the first pivot shaft 221 and the first frame 260 or the second frame 270, a bearing may be sleeved on the outer side of the first pivot shaft 221 to reduce a friction coefficient, so that the second frame 270 moves more smoothly relative to the first frame 260. Similarly, in order to reduce friction between the second pivot shaft 222 and the second frame 270 or the third frame 280, a bearing may be sleeved on the outer side of the second pivot shaft 222 to reduce a friction coefficient, so that the third frame 280 moves more smoothly relative to the second frame 270.

In order to avoid overlapping the actions of the first pivot 221 and the second pivot 222, referring to fig. 3 and fig. 4, an included angle is formed between the extending direction of the first pivot 221 and the extending direction of the second pivot 222, so that the two SMA driving assemblies 230 can respectively drive the camera module 300 to rotate around the first pivot 221 and the second pivot 222, thereby realizing anti-shake adjustment in two different rotation directions. In order to facilitate the control terminal to establish a spatial coordinate system of the rotating frame 210, the extending direction of the first pivot 221 is perpendicular to the extending direction of the second pivot 222. In order to make the stress of the second frame 270 and the third frame 280 more uniform during rotation, the first pivot shaft 221 is located at the middle of the second frame 270; the second pivot 222 is located at the middle of the third frame 280.

Referring to fig. 2 to 5, in order for the SMA drive assembly 230 to better control rotation of the rotating frame 210 located at the inner side, the SMA drive assembly 230 includes two drive units 231; one of the driving units 231 is for driving the rotating frame 210 located at the inner side to rotate around the rotating shaft 220 in a forward direction with respect to the rotating frame 210 located at the outer side; the other driving unit 231 is for driving the rotating frame 210 located at the inner side to be reversed around the rotation shaft 220 with respect to the rotating frame 210 located at the outer side. That is, when the SMA driving assembly 230 drives the rotating frame 210 to rotate forward or backward by using the two driving units 231, respectively, and the rotating frame 210 located at the inner side needs to rotate forward, the driving unit 231 is heated and contracted to drive the rotating frame 210 to rotate forward when current is input to the driving unit 231 responsible for rotating forward (at this time, the driving unit 231 responsible for rotating backward does not input current, and is in a relaxed state and does not interfere with the forward movement). Similarly, when the rotating frame 210 located inside needs to be reversed, the driving unit 231 responsible for the reversal is heated and contracted to drive the rotating frame 210 to reverse (at this time, the driving unit 231 responsible for the forward rotation does not input current, is in a diastolic state, and does not interfere with the reversing motion).

Referring to fig. 2 to 5, in order to ensure that the driving unit 231 can drive the rotating frame 210 to move, the driving unit 231 includes an inner frame connecting portion 232, an outer frame connecting portion 233, and an SMA expansion member 234; the inner frame connecting part 232 is disposed on the rotating frame 210 of the anti-shake frame group located at the inner side; the outer frame connecting part 233 is arranged on the rotating frame 210 positioned at the outer side of the anti-shake frame group, one end of the SMA telescopic piece 234 is connected with the inner frame connecting part 232, and the other end of the SMA telescopic piece 234 is connected with the outer frame connecting part 233; the inner frame connecting part 232 and the outer frame connecting part 233 of the same driving unit 231 are respectively positioned at two sides of the rotating shaft 220, the SMA telescopic members 234 are shape memory alloy wires (heated and contracted when energized), the inner frame connecting part 232 and the outer frame connecting part 233 are respectively arranged at two sides of the rotating shaft 220, so that the SMA telescopic members 234 span the rotating shaft 220, when energized, the SMA telescopic members 234 are fixed on the outer side rotating frame 210, and the inner side rotating frame 210 is pulled to rotate positively or negatively around the rotating shaft 220, so that the purpose of driving the rotating frame 210 to rotate is achieved.

For the purpose of balanced stress, the two driving units 231 of the same SMA driving assembly 230 are respectively located at two sides of the rotating frame 210 along the length direction of the rotating shaft 220, wherein the two sides of the rotating frame 210 located at the inner side along the length direction of the rotating shaft 220 are respectively a first driving side 211 and a second driving side 212, and the two driving units 231 of the anti-shake frame set are respectively disposed on the first driving side 211 and the second driving side 212, so that one driving unit 231 is electrified and the other driving unit 231 is powered off so as to drive the rotating frame 210 located at the inner side to rotate forward or reversely. It should be noted that, after the other driving unit 231 is powered off and is in the diastole state, the driving force provided by the powered driving unit 231 can drive the rotating frame 210 located at the inner side to rotate, so as to achieve the purpose of driving the rotating frame 210 located at the inner side to rotate positively or reversely.

Specifically, as shown in fig. 3, 4, and 5, in the anti-shake frame group composed of the first frame 260 and the second frame 270, the second frame 270 is a rotating frame located at the inner side; the two inner frame connecting parts 232 of the two driving units 231 are respectively disposed on the first driving side 211 and the second driving side 212, and are respectively positioned at opposite corners of the second frame 270; the two outer frame connecting portions 233 are disposed at opposite corners of the first frame 260, and the SMA stretching member 234 spans the first pivot shaft 221, so that the two driving units 231 can drive the second frame 270 to rotate forward or backward around the first pivot shaft 221. Similarly, in the anti-shake frame group composed of the second frame 270 and the third frame 280, the third frame 280 is a rotating frame located at the inner side; the two inner frame connecting portions 232 of the two driving units 231 are respectively disposed on the first driving side 211 and the second driving side 212 of the third frame 280 and are respectively disposed at opposite angles of the third frame 280, the two outer frame connecting portions 233 are disposed at opposite angles of the second frame 270, and the SMA expansion member 234 spans the second pivot shaft 222, so that the two driving units 231 can be powered on by one of the driving units 231, and the other driving unit 231 can be powered off to drive the third frame 280 to rotate forward or reversely around the second pivot shaft 222.

Further, as shown in fig. 3, 4 and 5, the inner frame connecting part 232 has a first connecting jaw 235 provided on the inner side of the rotating frame 210 of the anti-shake frame group, and the first connecting jaw 235 is connected to the SMA expansion piece 234; the first connecting clamping jaw 235 is a conductive conducting piece, so that the SMA telescopic piece 234 is convenient for connecting with a control circuit to take electricity; similarly, the outer frame connecting portion 233 has a second connecting jaw 236 provided on the outer side of the rotating frame 210 of the anti-shake frame group, and the second connecting jaw 236 is connected to the SMA extension member 234. The second connecting clamping jaw 236 is a conductive member, which is conductive, so that the SMA expansion member 234 is conveniently connected with the control circuit to take electricity. The first and second connecting jaws 235, 236 clamp the two ends of the SMA bellows 234, respectively, so that current passes through the SMA bellows 234.

It should be noted that, in order to facilitate the SMA expansion piece 234 to take electricity, the circuit connected to the first connecting jaw 235 and the second connecting jaw 236 may be embedded on the rotating frame 210, or may be laid on the rotating frame 210, or may be directly suspended to be connected to the first connecting jaw 235 and the second connecting jaw 236. In addition, the first and second connecting jaws 235, 236 may be replaced with fixing members such as pads, screws, etc. to fix both ends of the SMA extension member 234.

It will be appreciated that referring to fig. 5, the camera module 300 generally has a flexible circuit board 310, and for facilitating the power-up of the SMA drive assembly 230, the line interface 320 of the SMA drive assembly 230 is directly disposed on the flexible circuit board 310 so that the SMA drive assembly 230 draws power from the outside.

Further, referring to fig. 3 to 5, in order to facilitate the feedback of the position information of the rotating frame 210 to the control terminal, the anti-shake frame set further includes a position identifier 240 and a position sensor 250; the position mark is provided on one of the rotating frames 210 of the anti-shake frame group, and the position sensor 250 is provided on the other rotating frame 210 of the anti-shake frame group. The position sensor 250 is used for transmitting the position information of the rotating frame 210 located at the inner side to the control terminal, so that the control terminal can determine where the current rotating frame 210 is located, and the control terminal can conveniently control the on-off of the current of the SMA driving assembly 230 and the energizing time, so as to adjust the position of the rotating frame 210, and achieve the purpose of automatic anti-shake focusing of the camera module 300.

Specifically, referring to fig. 4, in the anti-shake frame group consisting of the first frame 260 and the second frame 270, the position sensor 250 is disposed on the first frame 260, the corresponding position indicator 240 is disposed on the second frame 270, and both the position sensor 250 and the position indicator 240 are disposed at one side of the first pivot shaft 221, so that the position sensor 250 detects the current rotation angle of the second frame 270 through the position indicator 240, to feed back the position information of the second frame 270 at this time to the control terminal. Similarly, in the anti-shake frame group formed by the second frame 270 and the third frame 280, the position sensor 250 is disposed on the third frame 280, the corresponding position identifier 240 is disposed on the second frame 270, and the position sensor 250 and the position identifier 240 are disposed on one side of the second pivot shaft 222, so that the position sensor 250 detects the rotation angle of the current third frame 280 through the position identifier 240, and feeds back the position information of the third frame 280 at this time to the control terminal. It should be noted that, the position identifier 240 may be a magnetic force provided by a magnet, or a reflective sheet, a code wheel, or the like; the corresponding position sensor 250 is a magnetic force sensor, encoder, or the like. The detected position information of the position sensor 250 is an electrical signal that can be transmitted to the control terminal through a circuit on the rotating frame 210.

Further, in order to prevent the rotating frame 210 from rotating to a dead angle during rotation, the rotating frame 210, the mounting base 100, and the upper cover 110 are provided with a limiting device. Specifically, referring to fig. 3 to 6, the first frame 260 is provided with a first limit portion 261 and a second limit portion 262; the first limit part 261 and the second limit part 262 are respectively positioned at two sides of the second frame 270; the SMA driving assembly 230 drives the second frame 270 to rotate around the first pivot shaft 221, and the first limiting portion 261 and the second limiting portion 262 are disposed on the first frame 260, so as to limit the rotation range of the second frame 270; when the second frame 270 is rotated forward to the first preset position under the driving of the SMA driving assembly 230, the first limiting portion 261 abuts against the second frame 270, i.e. the first limiting portion 261 is used for limiting the forward rotation range of the second frame 270; when the second frame 270 is reversed to the second preset position under the driving of the SMA driving assembly 230, the second limiting portion 262 abuts against the second frame 270, i.e. the first limiting portion 261 is used for limiting the reversing amplitude of the second frame 270. Therefore, by providing the first and second limiting parts 261 and 262, the second frame 270 can be ensured to rotate within a preset swing range. The first preset position is a limit position of the second frame 270 when the second frame rotates forward; the second preset position is a limit position when the second frame 270 is reversed, and the first limit portion 261 and the second limit portion 262 may be disposed on the second frame 270 to abut against the first frame 260 to limit the rotation range of the second frame 270.

Similarly, as shown in fig. 3, 4 and 5, the third frame 280 is provided with a third limiting portion 281 and a fourth limiting portion 282, and the third limiting portion 281 and the fourth limiting portion 282 are respectively disposed at two sides of the third frame 280; when the third frame 280 is rotated forward to the third preset position under the driving of the SMA driving assembly 230, the third limiting portion 281 abuts against the second frame 270, i.e. the third limiting portion 281 is configured to limit the forward rotation range of the third frame 280; when the third frame 280 is reversed to the fourth preset position under the driving of the SMA driving assembly 230, the fourth limiting portion 282 abuts against the second frame 270, i.e. the fourth limiting portion 282 is used for limiting the reversing amplitude of the third frame 280. Therefore, by providing the third and fourth stopper portions 281 and 282, the third frame 280 can be ensured to rotate within a preset swing range. The third preset position is a limit position of the third frame 280 when it rotates forward; the fourth preset position is a limit position when the third frame 280 is reversed, and the third limit portion 281 and the fourth limit portion 282 may be disposed on the second frame 270 to abut against the third frame 280 to limit the rotation range of the third frame 280.

In summary, the frame assembly 200 of the camera anti-shake driving device has a plurality of rotating frames 210 sequentially arranged from outside to inside, two adjacent rotating frames 210 are rotationally connected through the rotating shaft 220, and the SMA driving assembly 230 is adopted to drive the rotating frames 210 to rotate, so that the frame assembly 200 forms a suspension frame capable of fixing and suspending the camera module 300, a multi-shaft anti-shake structure is formed, the camera module 300 can rotate relative to each rotating shaft 220, and the anti-shake performance of the camera module 300 is improved; and, two adjacent revolving frames 210 are connected through the rotation of the rotation shaft 220, the structure is simpler and more compact, compared with a camera adopting a voice coil motor to drive the rotation angle, the volume of the SMA driving component 230 is smaller, and the combined camera anti-shake driving device is smaller, so that the camera anti-shake driving device is suitable for the miniaturization trend of mobile equipment.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.

Claims (12)

1. The utility model provides a camera anti-shake drive arrangement which characterized in that includes:

a mounting base;

a frame assembly having a plurality of rotating frames sequentially disposed from outside to inside; the outermost rotating frame is arranged on the mounting seat; the innermost rotary frame is used for installing a camera module; two adjacent rotating frames form an anti-shake frame group;

the anti-shake frame group is provided with a rotating shaft and an SMA driving assembly, and the two rotating frames of the anti-shake frame group are rotationally connected through the rotating shaft; the SMA driving assembly is arranged between the two rotating frames of the anti-shake frame group and is used for driving the rotating frames positioned on the inner side to rotate positively or reversely around the rotating shaft.

2. The camera anti-shake driving apparatus according to claim 1, wherein the SMA driving assembly comprises two driving units; one of the driving units is used for driving the rotating frame positioned on the inner side to rotate positively around the rotating shaft; the other driving unit is used for driving the rotating frame positioned on the inner side to rotate reversely around the rotating shaft.

3. The camera shake-preventing driving apparatus according to claim 2, wherein the rotating frame located inside is provided with a first driving side and a second driving side on both sides in a longitudinal direction of the rotating shaft, respectively, and the two driving units of the shake-preventing frame group are provided on the first driving side and the second driving side, respectively.

4. The camera anti-shake driving apparatus according to claim 3, wherein the driving units each comprise an inner frame connecting portion, an outer frame connecting portion, and an SMA expansion member; the inner frame connecting part is arranged on the rotating frame positioned on the inner side of the anti-shake frame group; the outer frame connecting part is arranged on the rotating frame positioned at the outer side of the anti-shake frame group, one end of the SMA telescopic piece is connected with the inner frame connecting part, and the other end of the SMA telescopic piece is connected with the outer frame connecting part; the inner frame connecting part and the outer frame connecting part of the same driving unit are respectively positioned at two sides of the rotating shaft.

5. The camera anti-shake driving apparatus according to claim 4, wherein the two inner frame connecting portions of the two driving units of the SMA driving assembly are respectively disposed on the first driving side and the second driving side of the rotating frame located inside, and are respectively located at opposite angles of the rotating frame located inside.

6. The camera anti-shake driving apparatus according to claim 4, wherein the inner frame connecting portion has a first connecting jaw provided on a rotating frame located inside the anti-shake frame group, the first connecting jaw being connected to the SMA expansion piece; the outer frame connecting portion is provided with a second connecting clamping jaw which is arranged on the rotating frame outside the anti-shake frame group and connected with the SMA telescopic piece.

7. The camera anti-shake driving apparatus according to claim 1, wherein the anti-shake frame group further comprises a position mark and a position sensor; the position mark is arranged on one rotating frame of the anti-shake frame group, and the position sensor is arranged on the other rotating frame of the anti-shake frame group.

8. The camera anti-shake driving device according to claim 1, wherein the number of the rotating frames is three, the number of the anti-shake frame groups formed correspondingly is two, and the number of the rotating shafts and the number of the SMA driving components are two; an included angle is formed between the extending directions of the two rotating shafts.

9. The camera anti-shake driving apparatus according to claim 8, wherein the three rotating frames are respectively: a first frame, a second frame, a third frame; the first frame is arranged on the mounting seat; the third frame is used for installing a camera module; the two rotating shafts are respectively a first pivot shaft and a second pivot shaft; the second frame is pivoted with the first frame through the first pivot shaft; the third frame is pivoted with the second frame through the second pivot shaft, and the extending direction of the first pivot shaft is perpendicular to the extending direction of the second pivot shaft.

10. The camera anti-shake driving apparatus according to claim 9, wherein the first pivot shaft is located in a middle portion of the second frame; the second pivot shaft is positioned in the middle of the third frame.

11. The camera anti-shake driving apparatus according to claim 10, wherein the first frame is provided with a first limit portion and a second limit portion; the first limiting part and the second limiting part are respectively positioned at two sides of the second frame; when the second frame is driven by the SMA driving assembly to positively rotate to a first preset position, the first limiting part is abutted with the second frame; when the second frame is reversely rotated to a second preset position under the drive of the SMA driving assembly, the second limiting part is abutted with the second frame.

12. The camera anti-shake driving apparatus according to claim 10, wherein the third frame is provided with a third limit portion and a fourth limit portion, the third limit portion and the fourth limit portion being provided on both sides of the third frame, respectively; when the third frame positively rotates to a third preset position under the drive of the SMA driving assembly, the third limiting part is abutted with the second frame; when the third frame is reversely rotated to a fourth preset position under the drive of the SMA driving assembly, the fourth limiting part is abutted with the second frame.