CN114326006B - Lens module and mobile terminal - Google Patents

Abstract

The disclosure relates to a lens module and a mobile terminal. The lens module includes: the first bearing seat is internally provided with at least one first lens which is provided with a first optical axis; the second bearing seat is positioned below the first bearing seat, at least one second lens is arranged in the second bearing seat, and the second lens is provided with a second optical axis; the memory alloy wires are connected with the first bearing seat and the second bearing seat, and can drive the second bearing seat to move along the second optical axis direction relative to the first bearing seat; or the memory alloy wire can drive the second bearing seat to move relative to the first bearing seat along the direction vertical to the second optical axis; or the memory alloy wire can drive the second bearing seat to move relative to the first bearing seat so as to enable the second optical axis to incline relative to the first optical axis. The zoom and optical anti-shake functions are achieved through deformation of the memory alloy wires by connecting the plurality of memory alloy wires between the two lens bearing seats.

Description

Lens module and mobile terminal

Technical Field

The present disclosure relates to the field of camera technology, and in particular to a lens module and a mobile terminal.

Background technique

With the continuous development of technology, more and more mobile terminals are equipped with lens modules to realize photo and video functions. In addition, the lens modules also have auto focus (AF) function, lens anti-shake function (OIS) and zoom function to improve the quality of captured images.

In the related art, taking a mobile phone as an example, multiple lens modules are used to realize the zoom function, which occupies a large amount of mobile phone space, is not conducive to the miniaturization of the whole phone, and increases the cost.

In addition, by setting up electromagnetic drive (voice coil motor drive) to adjust multiple degrees of freedom of the lens module, anti-shake kinetic energy and autofocus functions are realized. Since the driving force of multiple degrees of freedom comes from the magnetic force of multiple electromagnets, electromagnetic interference is generated between multiple electromagnets, affecting the anti-shake and focus performance; and, in the current development of lens modules towards miniaturization, the electromagnetic driving force is insufficient, the anti-shake angle is small, and the imaging quality is affected.

Summary of the invention

In order to overcome the problems existing in the related art, the present disclosure provides a lens module and a mobile terminal.

According to a first aspect of the present disclosure, a lens module is provided, comprising: a first bearing seat, in which at least one first lens is arranged, and the first lens has a first optical axis; a second bearing seat, located below the first bearing seat, in which at least one second lens is arranged, and the second lens has a second optical axis; at least two memory alloy wires, respectively connected to the first bearing seat and the second bearing seat; wherein the memory alloy wire can drive the second bearing seat to move relative to the first bearing seat along the direction of the second optical axis; or, the memory alloy wire can drive the second bearing seat to move relative to the first bearing seat along a direction perpendicular to the second optical axis; or, the memory alloy wire can drive the second bearing seat to move relative to the first bearing seat, so that the second optical axis is tilted relative to the first optical axis.

In one embodiment, the memory alloy wire is arranged obliquely relative to the second optical axis.

In one embodiment, there are at least four memory alloy wires, which are respectively located around the second bearing seat and arranged opposite to each other in pairs.

In one embodiment, the memory alloy wire is arranged in a U-shape or a 匚-shape, and both ends of the memory alloy wire are respectively fixedly connected to the first bearing seat, and the middle part is fixedly connected to the second bearing seat.

In one embodiment, the lens module also includes: at least two groups of first fixing members, the first fixing members are fixed to the first supporting seat, and the two end portions of one memory alloy wire are respectively fixedly connected to a group of the first fixing members; at least two second fixing members, the second fixing members are fixed to the lower surface of the second supporting seat, and the second supporting seat is provided with a through hole corresponding to the second fixing member; wherein one memory alloy wire passes through the through hole, and the middle part is fixed to the second fixing member.

In one embodiment, the number of the first fixing members in a group is two, and the first fixing members have a rolling portion, and one of the rolling portions rolls and fixes one end portion of the memory alloy wire.

In one embodiment, the lens module also includes: a base, located below the second supporting seat; a first spring sheet, the first spring sheet having a first inner fixing portion, a first elastic arm extending outward from the first inner fixing portion, and a second elastic arm extending from the first elastic arm; the first inner fixing portion is fixed to the upper surface of the second supporting seat, the end of the first elastic arm is fixed to the lower surface of the first supporting seat, and the end of the second elastic arm is fixed to the base.

In one embodiment, the lens module also includes: a second spring piece, the second spring piece having a second inner fixing portion, and a third elastic arm extending outward from the second inner fixing portion, the second inner fixing portion is fixed to the upper surface of the first supporting seat, and the end of the third elastic arm is fixed to the base.

In one embodiment, the first elastic sheet includes at least two first parts separated from each other, and the at least two first parts are arranged at intervals along the circumference of the second transparent bearing seat.

In one embodiment, the second elastic sheet includes at least two second parts separated from each other, and the at least two second parts are spaced apart from each other along the circumference of the first bearing seat.

In one embodiment, the first spring piece and the second spring piece are both made of metal material, and in one of the memory alloy wires, one end is electrically connected to the first spring piece, and the other end is electrically connected to the second spring piece.

In one embodiment, the lens module further includes: a coil, which is sleeved on the peripheral wall of the first supporting seat; and at least one pair of magnets, which are relatively arranged on the outside of the coil.

According to a second aspect of an embodiment of the present disclosure, there is provided a mobile terminal, including: a terminal body; and

The lens module of any one of the embodiments in the first aspect above is arranged on the terminal body.

The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the present disclosure connects a plurality of memory alloy wires between two lens support seats and realizes zoom and optical image stabilization functions through the deformation of the memory alloy wires. Compared with the traditional magnetic drive method, the zoom and image stabilization performances are greatly improved.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

Fig. 1 is a schematic diagram showing the structure of a mobile terminal according to an exemplary embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a lens module according to an exemplary embodiment of the present disclosure.

Fig. 3 is an exploded schematic diagram of a lens module according to an exemplary embodiment of the present disclosure.

FIG. 4 is a schematic cross-sectional view of a lens module according to an exemplary embodiment of the present disclosure.

FIG. 5 is a schematic diagram of a structure in which a base and a housing are removed according to an exemplary embodiment of the present disclosure.

Fig. 6 is a bottom view schematically showing a case where a base and a housing are removed according to an exemplary embodiment of the present disclosure.

FIG. 7 is a schematic diagram of a memory alloy wire connection structure according to an exemplary embodiment of the present disclosure.

FIG. 8 is a simplified structural diagram of a driving module according to an exemplary embodiment of the present disclosure.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

FIG. 1 is a schematic diagram of the structure of a mobile terminal according to an exemplary embodiment of the present disclosure. FIG. 2 is a schematic diagram of the structure of a lens module according to an exemplary embodiment of the present disclosure. FIG. 3 is a schematic diagram of an exploded view of a lens module according to an exemplary embodiment of the present disclosure. FIG. 4 is a schematic diagram of a cross-sectional view of a lens module according to an exemplary embodiment of the present disclosure.

As shown in FIGS. 1 to 4 , the lens module 200 of the present disclosure can be installed in a mobile terminal 1. The mobile terminal can be a mobile phone, a laptop computer, a tablet computer, a wearable device, a camera, a video camera, a driving recorder, or other device with a photo or video function. The present disclosure embodiment is described by taking a mobile phone as an example, but is not limited thereto.

The lens module 200 may have auto focus, zoom and anti-shake functions, wherein the anti-shake function is used to eliminate the image deviation caused by the shaking of the mobile terminal 1 and the blurring of the image caused by the photosensitive element, so as to obtain a clearer image. The shaking of the mobile terminal includes the vibration caused by the human body holding it, and the vibration caused by the mobile device carrying the mobile terminal, such as a mobile stand or a moving vehicle.

The lens module 200 of the embodiment of the present disclosure may include a first bearing seat 222 , a second bearing seat 221 and at least two memory alloy wires 223 .

The first bearing seat 222 is used to bear at least one first lens 27. The first lens 27 has a first optical axis O1. The direction of the first optical axis O1 can be the thickness direction of the mobile terminal 1, that is, the Z direction in the figure. The second bearing seat 221 is located below the first bearing seat 222. The second bearing seat 221 is used to bear at least one second lens 28. The second lens 28 has a second optical axis O2. The direction of the second optical axis O2 is the Z direction in the figure. When the anti-shake function is not required, the first optical axis O1 and the second optical axis O2 coincide.

At least two memory alloy wires 223 are connected to the first support seat 222 and the second support seat 221 respectively. The memory alloy wire 223 can drive the second support seat 221 to move relative to the first support seat 222 along the second optical axis O2; or, the memory alloy wire 223 can drive the second support seat 221 to move relative to the first support seat 222 along a direction perpendicular to the second optical axis O2; or, the memory alloy wire 223 can drive the second support seat 221 to move relative to the first support seat 222, so that the second optical axis O2 is tilted relative to the first optical axis O1, thereby realizing the zoom and anti-shake functions of the lens module 200.

The memory alloy wire 223 is made of a shape memory alloy material. When the temperature of the memory alloy wire 223 increases, the length becomes shorter. When the temperature of the memory alloy wire 223 decreases, the original length can be restored. The temperature of the memory alloy wire 223 can be changed to obtain a deformation amount to change the length of the memory alloy wire 223. For example, the material of the memory alloy wire can include one or more of titanium-nickel alloy, copper-nickel alloy, copper-aluminum alloy, copper-zinc alloy, and iron alloy.

The lens module 200 disclosed in the present invention, on the one hand, when the multiple memory alloy wires 223 are deformed due to temperature changes, they can drive the second supporting seat 221 to move along the second optical axis O2 direction, such as the Z direction, relative to the first supporting seat 222, so as to change the relative position of the second lens 28 carried in the second supporting seat 221 and the first lens 27 carried in the first supporting seat 222, thereby realizing the zoom function of the lens module 200.

On the other hand, when the multiple memory alloy wires 223 are deformed due to temperature changes, the memory alloy wires 223 can drive the second support seat 221 to move relative to the first support seat 222 perpendicular to the second optical axis O2 direction (for example, X direction, Y direction), thereby compensating for the offset of the lens module 200 in the X-axis or Y-axis direction and realizing the anti-shake function in the X-axis and Y-axis directions.

On the other hand, when the multiple memory alloy wires 223 are deformed due to temperature changes, the memory alloy wires 223 can drive the second support seat 221 to rotate relative to the first support seat 222 along two axes (for example, X direction and Y direction), thereby compensating for the deflection angle of the lens module 200 in the X-axis direction or the Y-axis direction, that is, correcting the inclination angle of the second optical axis O2 relative to the first optical axis O1.

Therefore, the lens module 200 disclosed in the present invention connects multiple memory alloy wires to two lens bearing seats, and by controlling the temperature rise and fall of the memory alloy wires, it is easy to make the two bearing seats produce relative displacement, and can achieve the displacement of 5 degrees of freedom of one bearing seat. Compared with the traditional solution of using magnetic drive to achieve 5 degrees of freedom, the structure is simple, the space occupied is small, and the multiple memory alloy wires can be independent drive units without interference with each other, so the zoom and anti-shake performance are also greatly improved.

3, the first bearing seat 222 includes a substantially square or rectangular body having a receiving space extending therethrough for receiving at least one first lens 27. The receiving space is substantially circular, and its center line may coincide with the first optical axis O1.

As shown in FIG. 4 , the first lens 27 can be set to three and respectively set along the direction of the first optical axis O1. Multiple first lenses 27 can be set in the lens barrel and accommodated in the accommodation space of the first bearing seat 222 through the lens barrel, so that the multiple first lenses 27 are used as an integral module, which is convenient for subsequent maintenance and replacement. However, the present disclosure is not limited to this. The number of first lenses can be one, two or more, and the present disclosure does not limit the number of first lenses 27. The first lens 27 can also be directly installed in the accommodation space of the first bearing seat 222. In addition, the multiple first lenses 27 can be convex lenses, concave lenses, or a combination of concave-convex lenses. The first bearing seat 222 can be fixed on the base 21.

As shown in FIG3 and FIG4, the second bearing seat 221 is located below the first bearing seat 222, and is used to carry at least one second lens 28. In the figure, the second lens 28 is set to one, but the present disclosure is not limited to this, and the number of the second lens 28 can also be multiple. In addition, the second lens can also be a convex lens or a concave lens. When there are multiple second lenses 28, the multiple second lenses 28 can be a combination of concave and convex lenses.

FIG5 is a schematic diagram of a structure in which a base and a housing are removed according to an exemplary embodiment of the present disclosure. As shown in FIG3 and FIG5, a plurality of memory alloy wires 223 are connected to a first bearing seat 222 and a second bearing seat 221. A plurality of memory alloy wires 223 are made of a shape memory alloy (Shape Memory Alloys, SMA) material, and the shape memory alloy can change its length according to the change of temperature. In one example, the temperature of the memory alloy wire 223 can be changed by applying a current to the memory alloy wire, thereby changing the length of the memory alloy wire. When a current is applied to a plurality of memory alloy wires 223, the temperature thereof is increased, and the length of the memory alloy wire 223 is shortened. When the current is stopped, the memory alloy wire 223 can restore its original length. Therefore, by applying an appropriate current to each memory alloy wire 223, the plurality of memory alloy wires 223 can be controlled to change the length corresponding to the current magnitude, so that the second bearing seat 221 can be driven to move in different directions relative to the first bearing seat 222.

FIG6 is a schematic diagram of a bottom view with the base and the housing removed according to an exemplary embodiment of the present disclosure. As shown in FIG6, for example, the memory alloy wire 223 can be set to four, namely the first memory alloy wire 2231, the second memory alloy wire 2232, the third memory alloy wire 2233, and the fourth memory alloy wire 2234, and they are respectively located around the second bearing seat 221, and are arranged opposite to each other in pairs. For example, two relative memory alloy wires are arranged in the X-axis direction, namely the first memory alloy wire 2231 and the third memory alloy wire 2233, and two relative memory alloy wires are arranged in the Y-axis direction, namely the second memory alloy wire 2232 and the fourth memory alloy wire 2234. However, the present disclosure is not limited to this, and more memory alloy wires 223 can be arranged around the second bearing seat 221, respectively located around the second bearing seat 221, and arranged opposite to each other in pairs.

In one embodiment, as shown in FIG6 , each memory alloy wire 223 is tilted relative to the second optical axis O2, and the tilt angle can be, for example, 30 to 60 degrees. The tilted memory alloy wire 223 facilitates pulling the second bearing seat 221 to move relative to the first bearing seat 222 in a direction perpendicular to the second optical axis O2. In addition, the memory alloy wire 223 is tilted, and the pulling force generated by the memory alloy wire 223 due to pulling the second bearing seat 221 can be decomposed into two directions of force in the direction of the second optical axis O2 and perpendicular to the second optical axis O2, so that the second bearing seat 221 can be pulled upward (in the Z direction) and pulled outward (perpendicular to the Z direction). Therefore, through the cooperation of multiple memory alloy wires 223, it is possible to realize that the second bearing seat 221 has multiple forms of movement relative to the first bearing seat 222.

FIG7 is a schematic diagram of a memory alloy wire connection structure according to an exemplary embodiment of the present disclosure. As shown in FIG5 and FIG7, in one embodiment, each memory alloy wire 223 can be arranged in a U-shape or a 匚 shape, and the ends of the memory alloy wire 223 are respectively fixedly connected to the first bearing seat 222, and the middle is fixedly connected to the second bearing seat 221. The U-shaped or 匚-shaped memory alloy wire 223 is more stable when pulling the second bearing seat 221 to move, so that the zoom and anti-shake performance of the lens module 200 are more stable.

Among them, by connecting an external power source at both ends of each memory alloy wire 223 to energize it, each memory alloy wire 223 can independently form a loop. When the external power source applies different currents to each memory alloy wire 223, each memory alloy wire 223 can change to a different length, thereby adjusting the displacement of the second support seat 221 in different directions relative to the first support seat 222.

For example, as shown in Figure 6, on the one hand, when the lens module 200 needs a zoom function, the same current is applied to four memory alloy wires, namely the first memory alloy wire 2231, the second memory alloy wire 2232, the third memory alloy wire 2233, and the fourth memory alloy wire 2234, so that the first memory alloy wire 2231, the second memory alloy wire 2232, the third memory alloy wire 2233, and the third memory alloy wire 2233 change the same length, so that the four memory alloy wires jointly drive the second support seat 221 to move relative to the first support seat 222 along the direction of the second optical axis O2, and then the second lens 28 carried in the second support seat 221 can be moved closer to or away from the first lens 27 carried in the first support seat 222 along the direction of the second optical axis O2. In this way, the relative position between the first lens 27 and the second lens 28 can be changed to realize the zoom function of the lens module 200.

On the other hand, when the lens module 200 requires an optical image stabilization compensation function due to the shaking of the mobile terminal 1, different currents are independently applied to the four memory alloy wires to control the length change of each memory alloy wire, so that the second support seat 221 moves (translates) relative to the first support seat 222 in a direction perpendicular to the second optical axis, or the second optical axis is tilted relative to the second optical axis O2, that is, the second support seat 221 is tilted or deflected relative to the first support seat 222.

For example, when the lens module 200 needs to be translated along a direction perpendicular to the second optical axis O2 due to jitter, current can be applied only to any one memory alloy wire 223 on one axis to change the length of one of the multiple memory alloy wires 223 (for example, shorten it), and the lengths of the other three memory alloy wires remain unchanged. Since the memory alloy wires 223 are tilted relative to the second optical axis O2, the memory alloy wire 223 to which current is applied will pull the second support seat 221 to translate relative to the first support seat 222 approximately along a direction perpendicular to the second optical axis O2, thereby achieving translational jitter compensation.

For example, when the lens module 200 needs to perform displacement compensation in the positive direction of the X-axis due to jitter, a current corresponding to the displacement compensation amount can be applied only to the first memory alloy wire 2231 in the positive direction of the X-axis, while no current is applied to the other three memory alloys (the second memory alloy wire 2232, the third memory alloy wire 2233, and the fourth memory alloy wire 2234), so that the length of the first memory alloy wire 2231 becomes shorter, and the lengths of the second memory alloy wire 2232, the third memory alloy wire 2233, and the fourth memory alloy wire 2234 remain unchanged. Since the first memory alloy wire 2231 is tilted relative to the second optical axis O2, the first memory alloy wire 2231 pulls the second support seat 221 to move horizontally in the X-axis direction relative to the first support seat 222 to complete the displacement compensation in the X-axis direction.

Similarly, when the lens module 200 needs to perform displacement compensation in the negative direction of the X-axis (the direction opposite to the positive direction) due to jitter, a current corresponding to the displacement compensation amount can be applied only to the second memory alloy wire 2232 in the negative direction of the X-axis, while no current is applied to the other three memory alloy wires (the first memory alloy wire 2231, the third memory alloy wire 2233, and the fourth memory alloy wire 2234), so that the length of the second memory alloy wire 2232 becomes shorter, while the lengths of the first memory alloy wire 2231, the third memory alloy wire 2233, and the fourth memory alloy wire 2234 remain unchanged. Since the second memory alloy wire 2232 is tilted relative to the second optical axis O2, the second memory alloy wire 2232 pulls the second bearing seat 221 to translate relative to the first bearing seat 222 in the negative direction of the X-axis to complete the displacement compensation in the negative direction of the X-axis.

Similarly, when the lens module 200 needs to perform displacement compensation in the positive and negative directions of the Y axis due to shaking, the principle is the same as that in the positive and negative directions of the X axis, and will not be repeated.

In addition, when the lens module 200 needs the second bearing seat 221 to rotate around an axis due to shaking, different currents can be applied to the relatively arranged memory alloy wires 223 to cause them to produce opposite deformations, while the deformations of the memory alloy wires 223 in other axes remain unchanged.

For example, when the lens module 200 needs to rotate the second supporting seat 221 around the X-axis due to shaking, different currents are applied to the second memory alloy wire 2232 and the fourth memory alloy wire 2234 set relative to the Y-axis to cause them to produce opposite deformation amounts. For example, the length of the second memory alloy wire 2232 becomes longer and the length of the fourth memory alloy wire 2234 becomes shorter, so that the second memory alloy wire 2232 can pull the second supporting seat 221 to rotate around the X-axis to compensate for the inclination angle of the second optical axis O2 relative to the first optical axis O1 in the X-axis direction.

In addition, when the lens module 200 needs to rotate the second supporting seat 221 around the Y-axis due to shaking, different currents are applied to the first memory alloy wire 2231 and the third memory alloy wire 2233 set relative to the X-axis to cause them to produce opposite deformation amounts. For example, the length of the first memory alloy wire 2231 becomes longer and the length of the third memory alloy wire 2233 becomes shorter, so that the first memory alloy wire 2231 can pull the second supporting seat to rotate around the Y-axis to make the second optical axis O2 tilt at an angle relative to the first optical axis O1 in the Y-axis direction.

In summary, in the lens module 200 disclosed in the present invention, the second support seat 221 can translate in three axes, namely, the X-axis, the Y-axis and the Z-axis, and can rotate around the X-axis and the Y-axis relative to the first support seat 222, that is, the second support seat 221 can achieve five axial degrees of freedom relative to the first support seat 222, thereby being able to more effectively improve the zoom and anti-shake performance of the lens module 200.

In some embodiments, as shown in FIG7 , the lens module 200 further includes at least two groups of first fixing members 224 and at least two second fixing members 225. The first fixing member 224 is fixed to the first bearing seat 222, and the two end portions of a memory alloy wire 223 are respectively fixedly connected to a group of first fixing members 224. The two end portions of a memory alloy wire 223 are respectively fixedly connected to a group of first fixing members 224. For example, the first fixing members 224 are arranged in four groups, and each group of first fixing members 224 can be fixed to the lower surface of the first bearing seat 222, and the two end portions of the four memory alloy wires are respectively fixedly connected to each group of first fixing members 224.

The second fixing member 225 is fixed to the lower surface of the second bearing seat 221, and the second bearing seat 221 is provided with a through hole corresponding to the second fixing member 225, and a memory alloy wire 223 passes through the through hole, and the middle part is fixed to one second fixing member 225. For example, four second fixing members 225 are provided, and the middle part of a memory alloy wire is wound and fixed to the lower surface of one second fixing member 225. For example, the lower surface of the second fixing member 225 may be provided with a fixing groove, and the middle part of the memory alloy wire 223 may be embedded in the fixing groove (groove line) to prevent the memory alloy wire 223 and the second fixing member 225 from sliding relative to each other when the memory alloy wire 223 pulls the second fixing member 225.

In one embodiment, the number of a set of first fixing members 224 is two, and the first fixing member 224 has a rolling portion, and one rolling portion is rolled and fixed to one end of a memory alloy wire 223, that is, the two ends of a memory alloy wire 223 are respectively rolled and fixed to the two rolling portions. The first fixing member 224 can be made of metal and can be used as a conductor of the memory alloy wire 223 to be electrically connected to an external power source.

In some embodiments, as shown in FIG. 3 , the lens module 200 further includes a base 21 and a first elastic piece 231 .

The base 21 is located below the second bearing seat 221. The base 21 includes a substantially square or rectangular body and four protruding branches extending from the body toward the second bearing seat 221. In addition, a photosensitive element (not shown) may be provided below the base 21, and light from the object to be photographed is refracted by the first lens 27 and the second lens 28 and then converges on the photosensitive element through the through hole to form an image.

As shown in Figure 6, the first elastic piece 231 has a first inner fixing portion (not marked in the figure), a first elastic arm 2311 extending outward from the first inner fixing portion, and a second elastic arm 2312 extending from the first elastic arm 2311; the first inner fixing portion is fixed to the upper surface of the second supporting seat 221, the end of the first elastic arm 2311 is fixed to the lower surface of the first supporting seat 222, and the end of the second elastic arm 2312 is fixed to the base 21, for example, fixed to a branch of the base 21.

The first spring piece 231 is a hollow structure for light to pass through. The cross-sectional area of the hollow portion of the first spring piece 231 (the cross-sectional area perpendicular to the optical axis) is larger than the surface area of the lens in the lens module 200 to prevent light from being blocked and affecting the imaging quality. For example, the first spring piece 231 can be a hollow ring.

The second bearing seat 221 is connected to the base 21 via the first elastic sheet 231 , so that the second bearing seat 221 is movably connected to the base and can return to its original position via the first elastic arm 2311 and the second elastic arm 2312 of the first elastic sheet 231 .

In one embodiment, the first spring piece 231 includes at least two first parts separated from each other, that is, at least two sections, and at least two first parts are arranged at intervals along the circumference of the second bearing seat 221. The first spring piece 231 can be made of metal. The number of the first spring pieces 231 arranged at intervals matches the number of the memory alloy wires 223, and can be electrically connected to the memory alloy wires 223 respectively. For example, the first spring piece 231 includes four parts, that is, four sections are arranged at intervals along the circumference of the second bearing seat 221. For example, at least two first parts separated from each other can constitute a complete first spring piece 231, wherein each first part can include a part of the first inner fixing portion, and some of the first parts can also include a first elastic arm 2311 and a second elastic arm 2312.

The lens module 200 further includes a second elastic piece 232. The second elastic piece 232 has a second inner fixing portion (not labeled in the figure) and a third elastic arm (not labeled in the figure) extending outward from the second inner fixing portion, the second inner fixing portion is fixed to the upper surface of the first bearing seat 222, and the end of the third elastic arm is fixed to the branch of the base 21.

The second spring piece 232 is a hollow structure for light to pass through. The cross-sectional area (cross-sectional area perpendicular to the optical axis) of the hollow portion of the second spring piece 232 is larger than the surface area of the lens in the lens module 200, so as to prevent light from being blocked and affecting the imaging quality. For example, the second spring piece 232 can be a hollow ring.

The second elastic piece 232 includes at least two second parts separated from each other, and at least two second parts are arranged at intervals along the circumference of the first bearing seat 222. The number of the second parts arranged at intervals matches the number of the memory alloy wires 223. For example, the second elastic piece 232 includes four elastic pieces separated from each other, which are arranged at intervals along the circumference of the first bearing seat 222. The second elastic piece 232 can be made of metal. For example, at least two second parts separated from each other can constitute a complete second elastic piece 232, wherein each second part can include a part of the second inner fixing portion, and some of the second parts can also include a third elastic arm.

In one embodiment, the first spring clip 231 and the second spring clip 232 are electrically connected to the two ends of the corresponding memory alloy wire 223, that is, in a memory alloy wire, one end is electrically connected to the first spring clip 231, and the other end is electrically connected to the second spring clip 232. Thus, each memory alloy wire 223 forms an independent loop. For example, the first spring clip 231 and the second spring clip 232 are electrically connected to the first fixing member 224 at the two ends of the memory alloy wire 223 through a wire. The first spring clip 231 can be connected to the positive pole of the external power supply, and the second spring clip 232 can be connected to the negative pole of the external power supply. Alternatively, the first spring clip 231 can be connected to the negative pole of the external power supply, and the second spring clip 232 can be connected to the positive pole of the external power supply.

The connection lines between the first spring piece 231 and the second spring piece 232 and the external power source can be embedded in the base 21 to avoid the connection lines being too long and tangled.

The first electrical connection point between the connection line (e.g., positive line) of the external power source and the first elastic sheet 231 can be the end of the first elastic arm 2311 or the end of the second elastic arm 2312 of the first elastic sheet 231, that is, the first electrical connection point and the end of the first elastic arm 2311 are fixed to the lower surface of the first bearing seat 222, or the first electrical connection point and the end of the second elastic arm 2312 are fixed to the body of the base 21. The second connection point between the connection line (e.g., negative line) of the external power source and the second elastic sheet 232 can be the end of the third elastic arm of the second elastic sheet 232, that is, the second connection point and the end of the third elastic arm are fixed to the branch of the base 21. Therefore, the external power connection line will not move due to the movement of the first bearing seat 222 and the second bearing seat 221, ensuring the reliability of the electrical connection.

The memory alloy wire 223 is electrically connected through the first spring clip 231 and the second spring clip 232. Since the first spring clip 231 and the second spring clip 232 are made of metal and are close to the memory alloy wire 223, the possibility of power failure due to winding of the wires when the second supporting seat 221 moves relative to the first supporting seat 222 can be avoided due to the arrangement of too long wires, thereby improving the reliability of the lens module 200.

As shown in FIG3 , in some embodiments, the lens module 200 further includes a coil 241 and at least one pair of magnets 242. The coil 241 is sleeved on the peripheral wall of the first bearing seat 222, and at least one pair of magnets 242 is relatively arranged on the outer side of the coil 241. A plurality of magnets 242 may be provided, and two of them are arranged on the outer side of the coil 241 in correspondence. The first bearing seat 222 and the second bearing seat 221 are driven to move along the optical axis direction of the lens module 200 through the interaction between the magnetic field generated by the current applied to the coil 241 and the magnetic poles of the magnets 242, so that the lens module 200 is relatively displaced relative to the photosensitive element under the base 21, thereby realizing the focusing function of the lens module 200.

The present invention realizes the focusing, zooming and anti-shake functions of the lens module 200 by combining magnetic drive with the deformation of memory alloy. Compared with the traditional method of realizing the above functions by magnetic drive, the structure of the lens module is simplified, the cost is reduced, and the performance is improved.

In one embodiment, the lens module 200 further includes a housing 26 for protecting the internal components. The housing 26 is fastened to the base 21 to form a space for accommodating the internal components of the lens module. The housing 26 has a through hole whose central axis roughly coincides with the first optical axis O1, and a lens barrel accommodating one or more first lenses 27 can be inserted into the through hole of the housing 26. In addition, a gasket 25 is also provided between the housing 26 and the second elastic sheet 232 to play a buffering role when the first bearing seat 222 moves along the direction of the optical axis.

The magnet 242 may be fixed on the inner wall of the housing 26 , but is not limited thereto. The magnet 242 may also be fixed on the base 21 , as long as the magnet 242 is located on both sides of the coil 241 to ensure performance.

As shown in FIG8 , in summary, the above-mentioned focusing function can send a control instruction to the driver circuit (Driver IC) 102 through the processing chip (AP/SOC) 101 in the mobile terminal 1, and the driver circuit 102 controls the current flowing into the coil 241 to adjust the displacement required for the focus (AF) of the lens module 200. The anti-shake function (OIS) of the lens module 200 can obtain the jitter offset information through the gyroscope (GYRO) 103 set inside the mobile terminal 1. The driver circuit (Driver IC) 102 inside the mobile terminal 1 calculates the offset and offset direction caused by the jitter according to the jitter offset information, and thus controls the required deformation of multiple memory alloy wires (SMA) 223 according to the jitter offset and offset direction, so as to compensate for the jitter offset and offset direction, thereby achieving the purpose of anti-shake.

According to the second aspect of the embodiment of the present disclosure, a mobile terminal 1 is provided. As shown in FIG1 , the mobile terminal 1 includes: a terminal body 100 and a lens module 200 . The lens module 200 is the lens module 200 of any embodiment in the first aspect described above. The lens module 200 is disposed on the terminal body 100 .

The mobile terminal 1 may be a mobile phone, a laptop computer, a tablet computer, a wearable device, a camera, a video camera, a driving recorder, or other device with a photo or video recording function.

The mobile terminal of the present disclosure can realize zoom and optical image stabilization functions by setting the lens module 200 of the present disclosure, and the performance is greatly improved.

It is to be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar thereto. "And/or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and/or B may represent: A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include plural forms, unless the context clearly indicates other meanings.

It is further understood that the terms "first", "second", etc. are used to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not indicate a specific order or degree of importance. In fact, the expressions "first", "second", etc. can be used interchangeably. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

It can be further understood that the orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation.

It can be further understood that, unless otherwise specified, “connection” includes a direct connection without other components between the two, and also includes an indirect connection with other components between the two.

It is further understood that, although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring the operations to be performed in the specific order shown or in a serial order, or requiring the execution of all the operations shown to obtain the desired results. In certain environments, multitasking and parallel processing may be advantageous.

Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (13)

1. A lens module, comprising:

The optical lens comprises a first bearing seat, at least one first lens is arranged in the first bearing seat, and the first lens is provided with a first optical axis;

The second bearing seat is positioned below the first bearing seat, at least one second lens is arranged in the second bearing seat, and the second lens is provided with a second optical axis;

The two ends of the memory alloy wires are fixedly connected with the first bearing seat respectively, and the middle part of the memory alloy wires is fixedly connected with the second bearing seat;

The second bearing seat realizes 5 axial degrees of freedom relative to the first bearing seat,

The memory alloy wire can drive the second bearing seat to move along the second optical axis direction relative to the first bearing seat; or the memory alloy wire can drive the second bearing seat to move relative to the first bearing seat along the direction perpendicular to the second optical axis; or the memory alloy wire can drive the second bearing seat to move relative to the first bearing seat so as to enable the second optical axis to incline relative to the first optical axis.

2. The lens module as recited in claim 1, wherein,

The memory alloy wire is disposed obliquely with respect to the second optical axis.

3. The lens module as recited in claim 2, wherein,

The memory alloy wires are at least four, are respectively positioned at the periphery of the second bearing seat, and are arranged in a pairwise opposite way.

4. The lens module as recited in claim 1, wherein,

The memory alloy wire is arranged in a U shape or 匚 shape.

5. The lens module of claim 4, wherein the lens module further comprises:

The two ends of one memory alloy wire are fixedly connected with one group of first fixing pieces respectively;

The second fixing pieces are fixed on the lower surface of the second bearing seat, and the second bearing seat is provided with through holes corresponding to the second fixing pieces; one of the memory alloy wires passes through the through hole, and the middle part of the memory alloy wire is fixed on one of the second fixing pieces.

6. The lens module as recited in claim 5, wherein,

The number of the first fixing pieces is two, the first fixing pieces are provided with rolling parts, and one rolling part is used for rolling and fixing one end part of one memory alloy wire.

7. The lens module of claim 1, wherein the lens module further comprises:

The base is positioned below the second bearing seat;

A first elastic piece having a first inner fixing portion, a first elastic arm extending outward from the first inner fixing portion, and a second elastic arm extending from the first elastic arm;

The first inner fixing part is fixed on the upper surface of the second bearing seat, the end part of the first elastic arm is fixed on the lower surface of the first bearing seat, and the end part of the second elastic arm is fixed on the base.

8. The lens module of claim 7, wherein the lens module further comprises:

The second elastic piece is provided with a second inner fixing part and a third elastic arm which extends outwards from the second inner fixing part, the second inner fixing part is fixed on the upper surface of the first bearing seat, and the end part of the third elastic arm is fixed on the base.

9. The lens module as recited in claim 8, wherein,

The first elastic sheet comprises at least two first parts which are mutually separated, and the at least two first parts are arranged at intervals along the circumferential direction of the second bearing seat.

10. The lens module as recited in claim 9, wherein,

The second elastic sheet comprises at least two second parts which are mutually separated, and the at least two second parts are arranged at intervals along the circumferential direction of the first bearing seat.

11. The lens module as recited in claim 10, wherein,

The first elastic sheet and the second elastic sheet are both made of metal materials, and in one memory alloy wire, one end part of the first elastic sheet is electrically connected with the first elastic sheet, and the other end part of the first elastic sheet is electrically connected with the second elastic sheet.

12. The lens module of claim 7, wherein the lens module further comprises:

The coil is sleeved on the peripheral wall of the first bearing seat;

at least one pair of magnets is disposed opposite to the outside of the coil.

13. A mobile terminal, comprising:

A terminal body; and

The lens module of any one of claims 1 to 12, the lens module being disposed at the terminal body.