CN211878285U - Lens driving device for automatic focusing with optical anti-shake function - Google Patents
Lens driving device for automatic focusing with optical anti-shake function Download PDFInfo
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- CN211878285U CN211878285U CN202020160716.9U CN202020160716U CN211878285U CN 211878285 U CN211878285 U CN 211878285U CN 202020160716 U CN202020160716 U CN 202020160716U CN 211878285 U CN211878285 U CN 211878285U
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Abstract
The present disclosure provides a lens driving device for auto-focusing having an optical anti-shake function, including: a lens support frame body, wherein at least one lens for obtaining images is arranged in the hollow part of the lens support frame body; an auto-focusing frame body which is arranged outside the lens supporting frame body and drives the lens supporting frame body in the optical axis direction of the lens through the mutual magnetic action between a coil arranged on the auto-focusing frame body and a permanent magnet arranged on the lens supporting frame body so as to provide an auto-focusing function; an optical anti-shake frame body provided outside the auto-focusing frame body; and two end supporting parts arranged at two ends of the SMA elastic body are fixedly connected to the support columns of the optical anti-shake frame body, and a central fixing part arranged at the central part of the SMA elastic body is fixedly connected to an SMA elastic body positioning part arranged on the automatic focusing frame body, wherein the number of the SMA elastic bodies is four, and the SMA elastic bodies are respectively positioned at four side surfaces of the optical anti-shake frame body. The disclosure also provides a camera device and an electronic apparatus.
Description
Technical Field
The present disclosure belongs to the field of optical anti-shake technology, and particularly relates to a lens driving device for auto-focusing, a camera device, and an electronic apparatus having an optical anti-shake function.
Background
With the increasing demands for high accuracy and high magnification of cameras, there is an increasing demand for a correction function of an optical anti-shake (OIS) function for correcting camera shake, vibration, and the like in electronic devices such as smartphones.
In the case where the OIS driver is added to the conventional OIS driver using the VCM or the like, the external dimensions, thickness dimensions, and the like are inevitably increased significantly, and therefore the drive device having a larger size is contrary to the trend of miniaturization of electronic products. Therefore, how to minimize the increase in size in the case of increasing the OIS driving apparatus is a technical problem to be solved in the field.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one of the above-described technical problems, the present disclosure provides an auto-focusing lens driving device having an optical anti-shake function, a camera device, and an electronic apparatus.
According to an aspect of the present disclosure, an auto-focusing lens driving apparatus having an optical anti-shake function includes:
a lens support frame body, wherein more than one lens for obtaining images is arranged in the hollow part of the lens support frame body;
an auto-focusing frame body which is provided outside the lens support frame body and drives the lens support frame body in an optical axis direction of a lens by a mutual magnetic action between a coil provided on the auto-focusing frame body and a permanent magnet provided on the lens support frame body to provide an auto-focusing function;
an optical anti-shake frame body provided outside the auto-focusing frame body; and
the two end supporting parts arranged at the two ends of the SMA elastic body are fixedly connected to the support columns of the optical anti-shake frame body, the central fixing part arranged at the center of the SMA elastic body is fixedly connected to the SMA elastic body positioning part arranged on the automatic focusing frame body,
wherein the number of the SMA elastic bodies is four, and the SMA elastic bodies are respectively positioned on four side surfaces of the optical anti-shake frame body.
According to at least one embodiment, the two-end supporting part of the SMA elastomer is an electrode end of the SMA elastomer and is used for receiving external current.
According to at least one embodiment, the two end supporting portions of each SMA elastic body are fixed to the pillars at the corners of the optical anti-shake frame, and the center fixing portion of each SMA elastic body is fixed to the SMA elastic body positioning portion of the automatic focusing frame.
According to at least one embodiment, the four SMA elastomers are a first SMA elastomer, a second SMA elastomer, a third SMA elastomer and a fourth SMA elastomer, the first and second SMA elastomers are perpendicular to a first direction, the third and fourth SMA elastomers are perpendicular to a second direction, and the first and second directions are in a plane direction perpendicular to the optical axis direction and are perpendicular to each other.
According to at least one embodiment, when the first SMA elastomer is energized and the second SMA elastomer is not energized, the first SMA elastic body deforms from the initial shape to a preset shape to drive the frame body for automatic focusing to move towards the direction of the second SMA elastic body, and simultaneously energizing the third SMA elastic body and the fourth SMA elastic body to deform from the initial shape to a predetermined shape so that the frame for automatic focusing is held at a central position in the second direction, and when the first SMA elastic body is deenergized and deformed from the predetermined shape to the initial shape to return the frame for automatic focusing to the central position in the first direction, while the third SMA elastomer and the fourth SMA elastomer are de-energized and deformed from the predetermined shape to the initial shape, the frame body for automatic focusing is driven to return to the central position in the first direction by the acting force generated by the deformation of the third SMA elastic body and the fourth SMA elastic body from the preset shape to the initial shape; and
when the second SMA elastic body is energized and the first SMA elastic body is not energized, the second SMA elastic body is deformed from the initial shape to the predetermined shape to move the frame for automatic focusing toward the first SMA elastic body, and at the same time, the third SMA elastic body and the fourth SMA elastic body are energized to be deformed from the initial shape to the predetermined shape so that the frame for automatic focusing is held at the central position in the second direction, and when the second SMA elastic body is de-energized and deformed from the predetermined shape to the initial shape so that the frame for automatic focusing is returned to the central position in the first direction, the third SMA elastic body and the fourth SMA elastic body are de-energized and deformed from the predetermined shape to the initial shape, and the frame for automatic focusing is returned to the central position in the first direction by the urging force generated by the third SMA elastic body and the fourth SMA elastic body being deformed from the predetermined shape to the initial shape.
According to at least one embodiment, when the third SMA elastomer is energized and the fourth SMA elastomer is not energized, the third SMA elastic body deforms from the initial shape to a preset shape to drive the frame body for automatic focusing to move towards the direction of the fourth SMA elastic body, and at the same time, energizing the first SMA elastic body and the second SMA elastic body to deform from the initial shape to a predetermined shape so that the frame for automatic focusing is held at a central position in the first direction, and when the third SMA elastic body is deenergized and deformed from the predetermined shape to the original shape to return the frame for automatic focusing to the central position in the second direction, while the first and second SMA elastomers are de-energized and deformed from the predetermined shape to the initial shape, the frame body for automatic focusing is driven to return to the central position in the second direction by the acting force generated by the deformation of the first SMA elastic body and the second SMA elastic body from the preset shape to the initial shape; and
when the fourth SMA elastic body is energized and the third SMA elastic body is not energized, the fourth SMA elastic body is deformed from the initial shape to the predetermined shape to move the frame for automatic focusing toward the third SMA elastic body, and at the same time, the first SMA elastic body and the second SMA elastic body are energized to be deformed from the initial shape to the predetermined shape so that the frame for automatic focusing is held at the central position in the first direction, and when the fourth SMA elastic body is de-energized and is deformed from the predetermined shape to the initial shape so that the frame for automatic focusing is returned to the central position in the second direction, the first SMA elastic body and the second SMA elastic body are de-energized and are deformed from the predetermined shape to the initial shape, and the frame for automatic focusing is returned to the central position in the second direction by the urging force generated by the first SMA elastic body and the second SMA elastic body being deformed from the predetermined shape to the initial shape.
According to at least one embodiment, when the frame for automatic focusing is moved in the first diagonal direction, the first SMA elastic body and the third SMA elastic body are energized and the second SMA elastic body and the fourth SMA elastic body are not energized, so that the shape of the first SMA elastic body and the third SMA elastic body is deformed from the initial shape to the predetermined shape, thereby moving the frame for automatic focusing in the first diagonal direction, and when the frame for automatic focusing is returned to the central position in the diagonal direction, the first SMA elastic body and the third SMA elastic body are deenergized and the frame for automatic focusing is returned to the central position in the diagonal direction by the urging force generated by deformation from the predetermined shape to the initial shape,
wherein the first diagonal direction is a direction 45 degrees from the first and second directions and extends away from the first and third SMA elastomers.
According to at least one embodiment, when the frame for automatic focusing is moved in the second diagonal direction, the second SMA elastic body and the fourth SMA elastic body are energized while the first SMA elastic body and the third SMA elastic body are not energized, so that the shape of the second SMA elastic body and the fourth SMA elastic body is deformed from the initial shape to the predetermined shape, thereby moving the frame for automatic focusing in the second diagonal direction, and when the frame for automatic focusing is returned to the central position in the diagonal direction, the second SMA elastic body and the fourth SMA elastic body are deenergized and the frame for automatic focusing is returned to the central position in the diagonal direction by the force generated by deforming from the predetermined shape to the initial shape,
wherein the second diagonal direction is a direction 45 degrees from the first and second directions and extends away from the second and fourth SMA elastomers.
According to at least one embodiment, two permanent magnets are provided on the lens support frame and the frame for automatic focusing is provided with two coils, respectively, the two permanent magnets being provided on two adjacent side surfaces of the lens support frame.
According to at least one embodiment, further comprising: a focus guide ball for guiding the lens support frame in the optical axis direction when the lens support frame moves in the optical axis direction.
According to at least one embodiment, the focus guide ball is provided between the lens support frame and the frame for automatic focusing and is located in the vicinity of an intersection position of the two adjacent side surfaces.
According to at least one embodiment, the automatic focusing apparatus further comprises an optical anti-shake guide ball provided between a lower surface of the bottom wall of the automatic focusing housing and an upper surface of the bottom wall of the optical anti-shake housing.
According to at least one embodiment, the number of the optical anti-shake guide balls is three, and the optical anti-shake guide balls are provided in the vicinity of three corner positions of the frame for automatic focusing.
According to at least one embodiment, when the SMA elastic body is energized, the SMA elastic body is deformed from an initial shape to a predetermined shape, the predetermined shape being a shape protruding toward the frame for automatic focusing.
According to another aspect of the present disclosure, a camera apparatus includes the above-described lens driving apparatus for auto-focusing having an optical anti-shake function.
According to still another aspect of the present disclosure, an electronic apparatus includes the camera device as described above.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
Fig. 1 is a schematic view of an auto-focusing lens driving apparatus having an optical anti-shake function according to an embodiment of the present disclosure.
Fig. 2 is a schematic diagram of an auto-focusing lens driving apparatus having an optical anti-shake function according to an embodiment of the present disclosure.
Fig. 3 is a schematic diagram of SMA elastomer energizing and de-energizing according to one embodiment of the disclosure.
Fig. 4 is an optical anti-shake schematic according to one embodiment of the present disclosure.
Fig. 5 is an X-direction optical anti-shake schematic according to one embodiment of the present disclosure.
Fig. 6 is a Y-direction optical anti-shake schematic according to one embodiment of the present disclosure.
Fig. 7 is a diagonal direction optical anti-shake schematic according to one embodiment of the present disclosure.
Description of the reference numerals
10 lens driving device
100 lens holding frame
101 permanent magnet
200 frame for focusing
201 coil
202 flexible circuit board
203 magnetic element
204 elastic body positioning part
300 optical anti-shake frame
301 pillar part
400 SMA elastomer
401 both ends supporting part
402 center fixing part
500 focusing guide ball
600 optical anti-shake guide ball
A third SMA elastomer
B second SMA elastomer
Cth SMA elastomer
D a first SMA elastomer.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Accordingly, unless otherwise indicated, features of the various embodiments may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.
The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise noted, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality between the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.
When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.
For descriptive purposes, the present disclosure may use spatially relative terms such as "below … …," below … …, "" below … …, "" below, "" above … …, "" above, "" … …, "" higher, "and" side (e.g., as in "side wall") to describe one component's relationship to another (other) component as illustrated in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below … …" can encompass both an orientation of "above" and "below". Further, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Fig. 1 and 2 illustrate cross-sectional views of an auto-focusing lens driving apparatus having an optical anti-shake function according to an embodiment of the present disclosure.
As shown in fig. 1 and 2, the autofocus lens driving device 10 having an optical anti-shake function may include a lens support housing 100, an autofocus housing 200, an optical anti-shake housing 300, and an SMA (shape memory alloy) elastic body 400.
The lens support frame body 100 serves to support at least one lens, image photographing is achieved by adjusting the focal length of the lenses, and the lens support frame body 100 forms a hollow structure in which the lenses are installed.
The frame 200 for auto-focusing is provided outside the lens support frame 100 and surrounds the lens support frame 100. The lens holding frame 100 can be controlled to move in the optical axis direction (direction perpendicular to the paper surface of fig. 1) with respect to the autofocus frame 200. Specifically, the lens support frame is driven in the optical axis direction of the lens by the mutual magnetic interaction between the coil 201 provided on the frame 200 for auto-focusing and the permanent magnet 101 provided on the lens support frame 100 to provide the auto-focusing function. Among them, the number of the coils 201 and the permanent magnets 101 may be two, respectively, and may be disposed at adjacent side surfaces.
The lens driving device 10 may further include a flexible circuit board 202. Wherein the flexible circuit board 202 is disposed on a side of the coil, which is an opposite side of the coil 201 from the permanent magnet 101, for supplying power to the coil 201.
The lens driving device 10 may further include a magnetic member 203, the magnetic member 203 being for interacting with the permanent magnet 101 for holding or returning the lens holding frame body 100 and the like. The magnetic member 203 is located on the other side of the flexible circuit board 202.
The lens driving device 10 may further include a focus guide ball 500 for guiding the lens support frame 100 in the optical axis direction when the lens support frame 100 moves in the optical axis direction.
The focus guide ball 500 may be provided between the lens support housing 100 and the frame 200 for automatic focusing and located near the intersection of two adjacent side surfaces. The focusing guide balls 500 contact the side surfaces of the lens support housing 100 and the autofocus housing 200.
Wherein the focus guide balls 500 may include two sets and each set includes three balls (arranged perpendicular to the paper surface), the diameters of the upper and lower balls among the three balls are the same, and the diameter of the middle ball may be slightly smaller.
The optical anti-shake housing 300 is provided outside the autofocus housing 200 and surrounds the autofocus housing 200. The optical anti-shake housing 300 may be a base of the lens driving device.
Referring to fig. 2, both end supporting portions 401 provided at both ends of the SMA elastic body 400 are fixedly connected to the support columns 301 of the optical anti-shake casing 300, and a center fixing portion 402 provided at the center of the SMA elastic body is fixedly connected to the SMA elastic body positioning portion 204 provided in the autofocus casing 200. As shown in fig. 2, the SMA elastomer 400 may have two fixing holes on its two end supports, and the SMA elastomer is fixed to the strut 301 by connecting the fixing holes to corresponding protrusions on the strut 301. Likewise, there may be two fixing holes at the central fixing portion, and the fixing holes are fixed into the respective two protrusions of the positioning portion for fixing. As can be seen from fig. 1, the two end supporting portions of the SMA elastic body 400 are fixedly connected to the pillars 301 of the optical anti-shake frame body 300, the central fixing portion 402 is fixedly connected to the SMA elastic body positioning portion 204 provided in the auto-focusing frame body 200, and the other portions of the SMA elastic body 400 are not in contact with the optical anti-shake frame body 300 and the focusing frame body 200, which corresponds to the other portions being suspended in the gap between the optical anti-shake frame body 300 and the focusing frame body 200.
The number of the SMA elastic bodies is four, and the SMA elastic bodies are respectively located on four side surfaces of the optical anti-shake frame body 300.
The two-end support of the SMA elastomer 400 includes electrode terminals 403 of the SMA elastomer 400 through which an external current is supplied to the SMA elastomer 400.
The lens driving device 10 may further include an optical anti-shake guide ball 600. The optical anti-shake guide ball 600 is provided between the lower surface of the bottom wall of the autofocus housing 200 and the upper surface of the bottom wall of the optical anti-shake housing 300. The optical anti-shake guide ball 600 is used to support and guide the frame 200 for automatic focusing during the optical anti-shake process.
The optical anti-shake guide balls 600 are three in number and are provided near three corner positions of the frame 200 for automatic focusing. It is of course also possible to provide two adjacent corners and the other near the centre of the side opposite to the side where the two corners are located.
The shape change of the SMA elastomer of the present disclosure, which may also be referred to as an SMA spring, after energization will be described below with reference to fig. 3.
When the SMA elastic body is energized, the SMA elastic body is deformed from the initial shape to a predetermined shape (memory shape), and the predetermined shape is a shape protruding toward the frame for automatic focusing 200.
As shown in fig. 3 (a), when the electrode terminals at both ends of the SMA elastic body are energized, the SMA elastic body generates heat and increases in temperature, and deforms to a predetermined shape (memory shape), and the shape changes, and a corresponding urging force is generated, which corresponds to a spring and applies an urging force to the frame 200 for automatic focusing.
As shown in fig. 3 (b), after the electrode terminals at both ends of the SMA elastic body are powered off, the temperature of the SMA elastic body is lowered, and thus the force formed by the deformation due to the power-on is lost, so that when the SMA elastic body is subjected to an external force, the SMA elastic body is easily deformed and returns from the predetermined shape to the original shape.
As shown in fig. 4, the four SMA elastic bodies are a first SMA elastic body D, a second SMA elastic body B, a third SMA elastic body a, and a fourth SMA elastic body C, the first SMA elastic body D and the second SMA elastic body B are perpendicular to the first direction X, the third SMA elastic body a and the fourth SMA elastic body C are perpendicular to the second direction Y, and the first direction X and the second direction Y are located in a plane direction perpendicular to the optical axis direction and are perpendicular to each other.
The movement in the X + direction will be described as an example with reference to fig. 4. When the first SMA elastic body D is electrified and the second SMA elastic body B is not electrified, the first SMA elastic body D deforms from the initial shape to the preset shape to drive the frame body 200 for automatic focusing to move towards the direction of the second SMA elastic body B, and at the same time, the third SMA elastic body a and the fourth SMA elastic body C are energized to be deformed from the initial shape to the predetermined shape, so that the frame body 200 for automatic focusing is held at the central position in the second direction, and when the first SMA elastic body D is deenergized and deformed from the predetermined shape to the original shape to return the frame for automatic focusing 200 to the central position in the first direction, while the third SMA elastomer a and the fourth SMA elastomer C are de-energized and deformed from the predetermined shape to the initial shape, the automatic focusing frame 200 is driven to return to the center position in the first direction by the acting force generated when the third SMA elastic body a and the fourth SMA elastic body C deform from the predetermined shape to the initial shape.
As shown in fig. 4 (a) and (b), in the case of the energization of fig. 4 (a), the third SMA elastomer a and the fourth SMA elastomer C are shifted toward the X + direction by a distance S compared to the case of the non-energization of fig. 4 (b), and when the two elastomers are de-energized, the temperature drops, and the two elastomers will be deformed from the predetermined shape to the original shape, which will generate the force in the X-direction.
Fig. 5 shows the anti-shake control in the X direction.
Fig. 5 (a) shows the movement control in the X + direction. When the first SMA elastic body D is electrified and the second SMA elastic body B is not electrified, the first SMA elastic body D deforms from the initial shape to the preset shape to drive the frame body 200 for automatic focusing to move towards the direction of the second SMA elastic body B, and at the same time, the third SMA elastic body a and the fourth SMA elastic body C are energized to be deformed from the initial shape to the predetermined shape, so that the frame body 200 for automatic focusing is held at the central position in the second direction, and when the first SMA elastic body D is deenergized and deformed from the predetermined shape to the original shape to return the frame for automatic focusing 200 to the central position in the first direction, while the third SMA elastomer a and the fourth SMA elastomer C are de-energized and deformed from the predetermined shape to the initial shape, the automatic focusing frame 200 is driven to return to the center position in the first direction by the acting force generated when the third SMA elastic body a and the fourth SMA elastic body C deform from the predetermined shape to the initial shape.
Fig. 5 (b) shows the movement control in the X-direction. When the second SMA elastic body B is energized and the first SMA elastic body D is not energized, the second SMA elastic body B deforms from the initial shape to the predetermined shape to drive the frame 200 for automatic focusing to move toward the first SMA elastic body D, and at the same time, the third SMA elastic body a and the fourth SMA elastic body C are energized to be deformed from the initial shape to the predetermined shape, so that the frame body 200 for automatic focusing is held at the central position in the second direction, and when the second SMA elastic body B is deenergized and deformed from the predetermined shape to the original shape to return the frame for automatic focusing 200 to the central position in the first direction, while the third SMA elastomer a and the fourth SMA elastomer C are de-energized and deformed from the predetermined shape to the initial shape, the automatic focusing frame 200 is driven to return to the center position in the first direction by the acting force generated when the third SMA elastic body a and the fourth SMA elastic body C deform from the predetermined shape to the initial shape.
Fig. 6 shows the anti-shake control in the Y direction.
Fig. 6 (a) shows the movement control in the Y + direction. When the third SMA elastic body a is electrified and the fourth SMA elastic body C is not electrified, the third SMA elastic body a deforms from the initial shape to the predetermined shape to drive the frame body 200 for automatic focusing to move towards the fourth SMA elastic body C, and at the same time, the first SMA elastic body D and the second SMA elastic body B are energized to be deformed from the initial shape to the predetermined shape, so that the frame body 200 for automatic focusing is held at the central position in the first direction, and when the third SMA elastic body a is deenergized and deformed from the predetermined shape to the original shape to return the frame for automatic focusing 200 to the central position in the second direction, while the first SMA elastomer D and the second SMA elastomer B are de-energized and deformed from the predetermined shape to the initial shape, the automatic focusing frame 200 is driven to return to the center position in the second direction by the acting force generated when the first SMA elastic body D and the second SMA elastic body B are deformed from the predetermined shape to the initial shape.
Fig. 6 (b) shows the movement control in the Y-direction. When the fourth SMA elastic body C is energized and the third SMA elastic body a is not energized, the fourth SMA elastic body C deforms from the initial shape to the predetermined shape to drive the frame body 200 for automatic focusing to move toward the third SMA elastic body a, and at the same time, the first SMA elastic body D and the second SMA elastic body B are energized to be deformed from the initial shape to the predetermined shape, so that the frame body 200 for automatic focusing is held at the central position in the first direction, and when the fourth SMA elastic body C is deenergized and deformed from the predetermined shape to the original shape to return the frame for automatic focusing 200 to the central position in the second direction, while the first SMA elastomer D and the second SMA elastomer B are de-energized and deformed from the predetermined shape to the initial shape, the automatic focusing frame 200 is driven to return to the center position in the second direction by the acting force generated when the first SMA elastic body D and the second SMA elastic body B are deformed from the predetermined shape to the initial shape.
Fig. 7 shows the anti-shake control in the diagonal direction. The diagonal direction means a direction at 45 degrees to the XY direction. In the following, two of the four diagonal directions are taken as an example for explanation, and the other two diagonal directions are controlled similarly.
Fig. 7 (a) shows the movement control in the first diagonal (135 °) direction. When the frame 200 for automatic focusing is moved in the first diagonal direction, the first SMA elastic body D and the third SMA elastic body a are energized while the second SMA elastic body B and the fourth SMA elastic body C are not energized, so that the shapes of the first SMA elastic body D and the third SMA elastic body a are deformed from the initial shapes to the predetermined shapes, thereby moving the frame 200 for automatic focusing in the first diagonal direction, and when the frame 200 for automatic focusing is returned to the central position in the diagonal direction, the first SMA elastic body D and the third SMA elastic body a are deenergized and moving the frame 200 for automatic focusing back to the central position in the diagonal direction by the urging force generated by deforming from the predetermined shapes to the initial shapes.
Fig. 7 (b) shows the movement control in the second diagonal (315 °) direction. When the frame 200 for automatic focusing is moved in the second diagonal direction, the second SMA elastic body B and the fourth SMA elastic body C are energized while the first SMA elastic body D and the third SMA elastic body a are not energized, so that the shapes of the second SMA elastic body B and the fourth SMA elastic body C are deformed from the initial shapes to the predetermined shapes, thereby moving the frame 200 for automatic focusing in the second diagonal direction, and when the frame 200 for automatic focusing is returned to the central position in the diagonal direction, the second SMA elastic body B and the fourth SMA elastic body C are de-energized and moving the frame 200 for automatic focusing back to the central position in the diagonal direction by the urging force generated by deforming from the predetermined shapes to the initial shapes.
Although not shown in fig. 7, when the movement control is performed in the 45 ° direction, the first SMA elastic body D and the fourth SMA elastic body C are energized while the second SMA elastic body B and the third SMA elastic body a are not energized, so that the shapes of the first SMA elastic body D and the fourth SMA elastic body C are deformed from the initial shapes to the predetermined shapes, thereby moving the frame 200 for auto-focusing in the second diagonal direction, and when the frame 200 for auto-focusing is returned to the central position in the diagonal direction, the first SMA elastic body D and the fourth SMA elastic body C are de-energized and moving the frame 200 for auto-focusing back to the central position in the diagonal direction by the urging force generated by the deformation from the predetermined shapes to the initial shapes.
Although not shown in fig. 7, when the movement control is performed in the 225 ° direction, the second SMA elastic body B and the third SMA elastic body a are energized while the first SMA elastic body D and the fourth SMA elastic body C are not energized, so that the shapes of the second SMA elastic body B and the third SMA elastic body a are deformed from the initial shapes to the predetermined shapes, thereby moving the frame 200 for auto-focusing in the second diagonal direction, and when the frame 200 for auto-focusing is returned to the central position in the diagonal direction, the second SMA elastic body B and the third SMA elastic body a are deenergized and the frame 200 for auto-focusing is returned to the central position in the diagonal direction by the urging force generated by the deformation from the predetermined shapes to the initial shapes.
Table 1 shows the relationship between the energization of the SMA elastic member and the driving direction, in which when the SMA elastic member is energized (ON), the SMA spring is deformed to drive the autofocus housing toward the driving direction.
TABLE 1
According to the embodiments of the present disclosure, the shake and vibration in the X direction, the Y direction, and the diagonal direction can be corrected by controlling the four sides, respectively. And in the utility model discloses in, owing to adopted the SMA spring leaf, even if having increased OIS drive arrangement, also can make the size increase minimizing of driver.
The present disclosure also provides a camera apparatus including the above-described lens driving apparatus for auto-focusing having an optical anti-shake function.
The present disclosure also provides an electronic device including the above camera apparatus.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Claims (16)
1. An auto-focusing lens driving device having an optical anti-shake function, comprising:
a lens support frame body, wherein at least one lens for obtaining images is arranged in the hollow part of the lens support frame body;
an auto-focusing frame body which is provided outside the lens support frame body and drives the lens support frame body in an optical axis direction of a lens by a mutual magnetic action between a coil provided on the auto-focusing frame body and a permanent magnet provided on the lens support frame body to provide an auto-focusing function;
an optical anti-shake frame body provided outside the auto-focusing frame body; and
the two end supporting parts arranged at the two ends of the SMA elastic body are fixedly connected to the support columns of the optical anti-shake frame body, the central fixing part arranged at the center of the SMA elastic body is fixedly connected to the SMA elastic body positioning part arranged on the automatic focusing frame body,
wherein the number of the SMA elastic bodies is four, and the SMA elastic bodies are respectively positioned on four side surfaces of the optical anti-shake frame body.
2. The lens driving device for auto-focusing with optical anti-shake function according to claim 1, wherein the two-end supporting part of the SMA elastic body is an electrode end of the SMA elastic body and receives an external current.
3. The lens driving device for auto-focusing with an optical anti-shake function according to claim 2, wherein the support portions at both ends of each SMA elastic body are fixed to the support posts at the corners of the optical anti-shake frame, and the central fixing portion of each SMA elastic body is fixed to the SMA elastic body positioning portion of the auto-focusing frame.
4. The lens driving apparatus for auto-focusing with an optical anti-shake function according to claim 3, wherein the four SMA elastic bodies are a first SMA elastic body, a second SMA elastic body, a third SMA elastic body, and a fourth SMA elastic body, the first SMA elastic body and the second SMA elastic body are perpendicular to a first direction, the third SMA elastic body and the fourth SMA elastic body are perpendicular to a second direction, and the first direction and the second direction are in a plane direction perpendicular to the optical axis direction and are perpendicular to each other.
5. The lens driving device for auto-focusing with optical anti-shake function according to claim 4,
when the first SMA elastic body is electrified and the second SMA elastic body is not electrified, the first SMA elastic body deforms from an initial shape to a preset shape to drive the frame body for automatic focusing to move towards the direction of the second SMA elastic body, and simultaneously the third SMA elastic body and the fourth SMA elastic body are electrified to deform from the initial shape to the preset shape, so that the frame body for automatic focusing is kept at a central position in the second direction, and when the first SMA elastic body is powered off and deforms from the preset shape to the initial shape to return the frame body for automatic focusing to the central position in the first direction, simultaneously the third SMA elastic body and the fourth SMA elastic body are powered off and deform from the preset shape to the initial shape, and the acting force generated by the third SMA elastic body and the fourth SMA elastic body deforming from the preset shape to the initial shape drives the frame body for automatic focusing to return to the central position in the first direction; and
when the second SMA elastic body is energized and the first SMA elastic body is not energized, the second SMA elastic body is deformed from the initial shape to the predetermined shape to move the frame for automatic focusing toward the first SMA elastic body, and at the same time, the third SMA elastic body and the fourth SMA elastic body are energized to be deformed from the initial shape to the predetermined shape so that the frame for automatic focusing is held at the central position in the second direction, and when the second SMA elastic body is de-energized and deformed from the predetermined shape to the initial shape so that the frame for automatic focusing is returned to the central position in the first direction, the third SMA elastic body and the fourth SMA elastic body are de-energized and deformed from the predetermined shape to the initial shape, and the frame for automatic focusing is returned to the central position in the first direction by the urging force generated by the third SMA elastic body and the fourth SMA elastic body being deformed from the predetermined shape to the initial shape.
6. The lens driving device for auto-focusing with optical anti-shake function according to claim 5,
when the third SMA elastic body is electrified and the fourth SMA elastic body is not electrified, the third SMA elastic body deforms from the initial shape to the preset shape to drive the frame body for automatic focusing to move towards the fourth SMA elastic body direction, and simultaneously the first SMA elastic body and the second SMA elastic body are electrified to deform from the initial shape to the preset shape, so that the frame body for automatic focusing is kept at the central position in the first direction, and when the third SMA elastic body is powered off and deforms from the preset shape to the initial shape to return the frame body for automatic focusing to the central position in the second direction, simultaneously the first SMA elastic body and the second SMA elastic body are powered off and deform from the preset shape to the initial shape, and the frame body for automatic focusing is driven to return to the central position in the second direction by the acting force generated by the first SMA elastic body and the second SMA elastic body deforming from the preset shape to the initial shape; and
when the fourth SMA elastic body is energized and the third SMA elastic body is not energized, the fourth SMA elastic body is deformed from the initial shape to the predetermined shape to move the frame for automatic focusing toward the third SMA elastic body, and at the same time, the first SMA elastic body and the second SMA elastic body are energized to be deformed from the initial shape to the predetermined shape so that the frame for automatic focusing is held at the central position in the first direction, and when the fourth SMA elastic body is de-energized and is deformed from the predetermined shape to the initial shape so that the frame for automatic focusing is returned to the central position in the second direction, the first SMA elastic body and the second SMA elastic body are de-energized and are deformed from the predetermined shape to the initial shape, and the frame for automatic focusing is returned to the central position in the second direction by the urging force generated by the first SMA elastic body and the second SMA elastic body being deformed from the predetermined shape to the initial shape.
7. The lens driving device for auto-focusing with optical anti-shake function according to claim 6,
when the frame body for automatic focusing is moved in a first diagonal direction, the first SMA elastic body and the third SMA elastic body are electrified and the second SMA elastic body and the fourth SMA elastic body are not electrified, so that the shape of the first SMA elastic body and the third SMA elastic body is deformed from an initial shape to a predetermined shape, thereby driving the frame body for automatic focusing to move in the first diagonal direction, and when the frame body for automatic focusing is returned to a central position in the diagonal direction, the first SMA elastic body and the third SMA elastic body are deenergized and driving the frame body for automatic focusing to return to the central position in the diagonal direction by an acting force generated by deforming from the predetermined shape to the initial shape,
wherein the first diagonal direction is a direction 45 degrees from the first and second directions and extends away from the first and third SMA elastomers.
8. The lens driving device for auto-focusing with optical anti-shake function according to claim 7,
when the frame body for automatic focusing is moved in the second diagonal direction, the second SMA elastic body and the fourth SMA elastic body are electrified, and the first SMA elastic body and the third SMA elastic body are not electrified, so that the shapes of the second SMA elastic body and the fourth SMA elastic body are deformed from the initial shape to the preset shape, thereby driving the frame body for automatic focusing to move in the second diagonal direction, and when the frame body for automatic focusing returns to the central position in the diagonal direction, the second SMA elastic body and the fourth SMA elastic body are powered off, and the frame body for automatic focusing is driven to return to the central position in the diagonal direction by the acting force generated by deforming from the preset shape to the initial shape,
wherein the second diagonal direction is a direction 45 degrees from the first and second directions and extends away from the second and fourth SMA elastomers.
9. The lens driving apparatus for auto-focusing with an optical anti-shake function according to claim 1, wherein two permanent magnets are provided on the lens supporting frame and two coils are provided on the auto-focusing frame, respectively, the two permanent magnets being provided on two adjacent side surfaces of the lens supporting frame.
10. The lens driving apparatus for auto-focusing with an optical anti-shake function according to claim 9, further comprising: a focus guide ball for guiding the lens support frame in the optical axis direction when the lens support frame moves in the optical axis direction.
11. The lens driving device for auto-focusing with an optical anti-shake function according to claim 10, wherein the focus guide ball is provided between the lens support frame and the frame for auto-focusing and is located in the vicinity of the intersection of the two adjacent side surfaces.
12. The lens driving device for auto-focusing with an optical anti-shake function according to claim 1, further comprising an optical anti-shake guide ball provided between a lower surface of a bottom wall of the frame for auto-focusing and an upper surface of the bottom wall of the frame for optical anti-shake.
13. The autofocus lens driving device having an optical anti-shake function according to claim 12, wherein the number of the optical anti-shake guide balls is three, and the balls are provided near three corner positions of the autofocus housing.
14. The lens driving device for auto-focus with an optical anti-shake function according to any one of claims 1 to 13, wherein when the SMA elastic body is energized, the SMA elastic body is deformed from an initial shape to a predetermined shape, the predetermined shape being a shape convex toward the frame for auto-focus.
15. A camera device comprising the autofocus lens driving device having an optical anti-shake function according to any one of claims 1 to 14.
16. An electronic device characterized by comprising the camera apparatus of claim 15.
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| CN202020160716.9U CN211878285U (en) | 2020-02-10 | 2020-02-10 | Lens driving device for automatic focusing with optical anti-shake function |
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| CN202020160716.9U CN211878285U (en) | 2020-02-10 | 2020-02-10 | Lens driving device for automatic focusing with optical anti-shake function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111142214A (en) * | 2020-02-10 | 2020-05-12 | 睿恩光电有限责任公司 | Lens driving device for automatic focusing with optical anti-shake function |
| CN112637486A (en) * | 2020-12-16 | 2021-04-09 | 南昌欧菲光电技术有限公司 | Anti-shake drive arrangement, module and electronic equipment make a video recording |
-
2020
- 2020-02-10 CN CN202020160716.9U patent/CN211878285U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111142214A (en) * | 2020-02-10 | 2020-05-12 | 睿恩光电有限责任公司 | Lens driving device for automatic focusing with optical anti-shake function |
| CN112637486A (en) * | 2020-12-16 | 2021-04-09 | 南昌欧菲光电技术有限公司 | Anti-shake drive arrangement, module and electronic equipment make a video recording |
| CN112637486B (en) * | 2020-12-16 | 2022-08-23 | 南昌欧菲光电技术有限公司 | Anti-shake drive arrangement, module and electronic equipment make a video recording |
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