CN114326006A - Lens module and mobile terminal - Google Patents

Abstract

The disclosure relates to a lens module and a mobile terminal. The lens module includes: the lens driving device comprises a first bearing seat, a second bearing seat and a driving mechanism, wherein at least one first lens is arranged in the first bearing seat and 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 at least two memory alloy wires are connected with the first bearing seat and the second bearing seat, wherein the memory alloy wires can drive the second bearing seat to move along the direction of the second optical axis 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 that the second optical axis is inclined relative to the first optical axis. According to the lens zooming and optical anti-shake device, the plurality of memory alloy wires are connected between the two lens bearing seats, and zooming and optical anti-shake functions are achieved through deformation of the memory alloy wires.

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 science and technology, more and more mobile terminals are equipped with lens modules to realize photo and video functions, and the lens modules are also equipped with auto focus (AF) function, lens anti-shake function (OIS), zoom function (Zoom) function to improve the captured image quality.

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 of the mobile phone, which is not conducive to the miniaturization of the whole machine, and increases the cost.

In addition, by setting the electromagnetic drive (voice coil motor drive) to adjust the multiple degrees of freedom of the lens module, the anti-shake function and the auto focus function are realized. Since the driving force of multiple degrees of freedom comes from the magnetic force of multiple electromagnets, electromagnetic interference occurs between multiple electromagnets, which affects the anti-shake and focusing performance; and, in the current development of the lens module towards miniaturization, electromagnetic interference Insufficient driving force and small anti-shake angle affect image quality.

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, wherein at least one first lens is disposed in the first bearing seat, and the first lens has a first optical axis; a second bearing seat, Under the first bearing seat, at least one second lens is arranged in the second bearing seat, and the second lens has a second optical axis; at least two memory alloy wires are connected with the first bearing seat and The second bearing seats are respectively connected; 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 The second bearing seat can be driven to move relative to the first bearing seat in a direction perpendicular to the second optical axis; or, the memory alloy wire can drive the second bearing seat relative to the first bearing seat. The bearing seat moves to incline the second optical axis relative to the first optical axis.

In one embodiment, the memory alloy wire is disposed obliquely with respect to the second optical axis.

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

In one embodiment, the memory alloy wire is arranged in a U-shape or a zigzag shape, the two ends of the memory alloy wire are respectively fixedly connected to the first bearing seat, and the middle portion is fixed to the second bearing seat. connect.

In one embodiment, the lens module further includes: at least two sets of first fixing parts, the first fixing parts are fixed on the first bearing seat, and two ends of one of the memory alloy wires are respectively connected with the first fixing parts. A set of the first fixing pieces are fixedly connected; at least two second fixing pieces, the second fixing pieces are fixed on the lower surface of the second bearing seat, and the second bearing seat is provided with The through holes corresponding to the two fixing pieces; wherein, one of the memory alloy wires passes through the through holes, and the middle part is fixed to the second fixing piece.

In one embodiment, the number of the first fixing members in a group is two, the first fixing member has a crimping part, and one of the crimping parts is crimped and fixed to one end of the memory alloy wire .

In one embodiment, the lens module further includes: a base located below the second bearing seat; a first elastic piece, the first elastic piece has a first inner fixing part, and a first inner fixing part extends from the first inner fixing part to the lower part. a first elastic arm extending outward, and a second elastic arm extending from the first elastic arm; the first inner fixing portion is fixed on the upper surface of the second bearing seat, the first elastic arm The end of the second elastic arm is fixed to the lower surface of the first bearing seat, and the end of the second elastic arm is fixed to the base.

In one embodiment, the lens module further includes: a second elastic piece, the second elastic piece has a second inner fixing portion, a third elastic arm extending outward from the second inner fixing portion, the first Two inner fixing parts are fixed on the upper surface of the first bearing base, and the end part of the third elastic arm is fixed on the base.

In one embodiment, the first elastic piece 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 through-bearing base.

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

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

In one embodiment, the lens module further includes: a coil, the coil is sleeved on the peripheral wall of the first bearing seat; and at least one pair of magnets is disposed opposite to the outer side of the coil.

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

In the lens module according to any one of the embodiments of the first aspect, the lens module is disposed on the terminal body.

The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: the present disclosure realizes zooming and optical anti-shake functions through the deformation of the memory alloy wires by connecting a plurality of memory alloy wires between two lens bearing bases, which is compatible with traditional magnetic Compared with the driving method, the zoom and anti-shake performance 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.

Description of drawings

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

FIG. 1 is a schematic structural diagram 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 view of a lens module according to an exemplary embodiment of the present disclosure.

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 structural diagram showing the removal of the base and the casing according to an exemplary embodiment of the present disclosure.

FIG. 6 is a schematic bottom view showing the base and the housing removed according to an exemplary embodiment of the present disclosure.

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

FIG. 8 is a schematic 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 illustrated in the accompanying drawings. When the following description refers to the drawings, the same numerals in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments are not intended to represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure, as recited in the appended claims.

FIG. 1 is a schematic structural diagram 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 view of a lens module according to an exemplary embodiment of the present disclosure. 4 is a schematic cross-sectional view of a lens module according to an exemplary embodiment of the present disclosure.

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

The lens module 200 may have auto-focusing, zooming and anti-shake functions, wherein the anti-shake function is used to eliminate image blur caused by the deviation of the image from the photosensitive element caused by the shaking of the mobile terminal 1, so as to obtain a clearer image. Wherein, the shaking of the mobile terminal includes the vibration generated by the human being hand-held, and the vibration generated by the mobile device carrying the mobile terminal, for example, a mobile rack 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 carry at least one first lens 27 . The first lens 27 has a first optical axis O1 , and the direction of the first optical axis O1 may 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 for bearing 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 shown in the figure. Z direction. 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 bearing seat 222 and the second bearing seat 221 respectively, and the memory alloy wires 223 can drive the second bearing seat 221 to move relative to the first bearing seat 222 along the direction of the second optical axis O2 Alternatively, the memory alloy wire 223 can drive the second bearing seat 221 to move relative to the first bearing seat 222 along the direction perpendicular to the second optical axis O2; or, the memory alloy wire 223 can drive the second bearing seat 221 relative to the first bearing seat 221. The bearing base 222 moves so that the second optical axis O2 is inclined relative to the first optical axis O1 , so that the zooming and anti-shake functions of the lens module 200 can be realized.

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, and when the temperature of the memory alloy wire 223 decreases, the original length can be restored. The deformation value of the memory alloy wire 223 can be obtained by changing the temperature of the memory alloy wire 223 to change the length of the memory alloy wire 223 . For example, the material of the memory alloy wire may include one or more of titanium-nickel alloys, copper-nickel alloys, copper-aluminum alloys, copper-zinc alloys, and iron-based alloys.

In the lens module 200 of the present disclosure, on the one hand, when the plurality of memory alloy wires 223 are deformed due to temperature changes, they can drive the second bearing base 221 relative to the first bearing base 222 along the second optical axis O2 direction, for example, Z The direction moves to change the relative position of the second lens 28 carried in the second bearing seat 221 and the first lens 27 carried in the first bearing seat 222 , thereby realizing the zoom function of the lens module 200 .

On the other hand, when the plurality of memory alloy wires 223 are deformed due to temperature changes, the memory alloy wires 223 can drive the second bearing base 221 to be perpendicular to the second optical axis O2 direction (eg, the X direction, the Y direction, and the Y direction) relative to the first bearing base 222 . direction), so that the offset of the lens module 200 in the X-axis or Y-axis direction can be compensated, and the anti-shake function in the X-axis and Y-axis directions can be realized.

On the other hand, when the plurality of memory alloy wires 223 are deformed due to temperature changes, the memory alloy wires 223 can drive the second bearing seat 221 relative to the first bearing seat 222 along two axial directions (eg, the X direction and the Y direction). By rotating, the deflection angle of the lens module 200 in the X-axis direction or the Y-axis direction can be compensated, that is, the inclination angle of the second optical axis O2 corresponding to the first optical axis O1 can be corrected.

Therefore, in the lens module 200 of the present disclosure, by connecting a plurality of memory alloy wires on two lens bearing bases, and by controlling the heating and cooling of the memory alloy wires, it is easy to cause relative displacement of the two bearing bases, and can realize the relative displacement of one bearing base. 5 degrees of freedom displacement. Compared with the traditional solution using magnetic drive to achieve 5 freedoms, the structure is simple and the space is small, and multiple memory alloy wires can be independent drive units without interference with each other. Therefore, zoom and anti-shake Performance is also greatly improved.

In some embodiments, as shown in FIG. 3 , the first bearing seat 222 includes a substantially square or rectangular body, and the body has an accommodating space passing through the interior thereof, and the accommodating space is used for accommodating at least one first lens 27 . The accommodating space is substantially circular, and its center line may coincide with the first optical axis O1.

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

As shown in FIG. 3 and FIG. 4 , the second bearing seat 221 is located below the first bearing seat 222 for bearing at least one second lens 28 . In the figure, the second lens 28 is set as one, but the present disclosure does not use this As a limitation, the number of the second lenses 28 may also be multiple. In addition, the second lens may also be a convex lens or a concave lens. When there are multiple second lenses 28, the multiple second lenses 28 may be a combination of concave and convex lenses.

FIG. 5 is a schematic structural diagram showing the removal of the base and the casing according to an exemplary embodiment of the present disclosure. As shown in FIGS. 3 and 5 , a plurality of memory alloy wires 223 are connected to the first bearing seat 222 and the second bearing seat 221 . The plurality of memory alloy wires 223 are made of shape memory alloy (Shape Memory Alloys, SMA) material, and the length of the shape memory alloy can be changed 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 the plurality of memory alloy wires 223, the temperature of the memory alloy wires 223 is increased, so that the length of the memory alloy wires 223 is shortened. When the current is stopped, the memory alloy wires 223 can recover their original lengths. 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 magnitude of the current, so that the second bearing base 221 can be driven in different directions relative to the first bearing base 222 move.

FIG. 6 is a schematic bottom view showing the base and the housing removed according to an exemplary embodiment of the present disclosure. As shown in FIG. 6 , by way of example, four memory alloy wires 223 may be provided, namely a first memory alloy wire 2231 , a second memory alloy wire 2232 , a third memory alloy wire 2233 , and a fourth memory alloy wire 2234 , which are respectively located at The peripheries of the second bearing bases 221 are arranged opposite to each other. For example, in the X-axis direction, there are two opposite memory alloy wires, namely the first memory alloy wire 2231 and the third memory alloy wire 2233, and in the Y-axis direction, there are two opposite memory alloy wires, that is, the second memory alloy wire. Memory alloy wire 2232, fourth memory alloy wire 2234. However, the present disclosure is not limited to this, and more memory alloy wires 223 may be arranged around the second bearing base 221 , which are respectively located around the second bearing seat 221 and arranged opposite to each other.

In one embodiment, as shown in FIG. 6 , each memory alloy wire 223 is inclined relative to the second optical axis O2 , and the inclination angle may be, for example, 30-60 degrees. The obliquely arranged memory alloy wires 223 are convenient for pulling the second bearing base 221 to move relative to the first bearing base 222 in a direction perpendicular to the second optical axis O2 . In addition, the memory alloy wire 223 is arranged obliquely, and the pulling force generated by the memory alloy wire 223 due to pulling the second bearing seat 221 can be decomposed into two components in the direction of the second optical axis O2 and two directions perpendicular to the second optical axis O2, so that the Pull upward (Z direction) and pull outward (perpendicular to Z direction) the second bearing seat 221 . Therefore, through the cooperation of the plurality of memory alloy wires 223 , the second bearing base 221 can be moved in various forms relative to the first bearing base 222 .

FIG. 7 is a schematic diagram showing a connection structure of a memory alloy wire according to an exemplary embodiment of the present disclosure. 5 and 7 , in one embodiment, each memory alloy wire 223 may be arranged in a U-shape or an incline-shape, and both ends of the memory alloy wire 223 are fixedly connected to the first bearing seat 222 respectively, and the middle portion is connected to the second bearing seat 222 respectively. The bearing base 221 is fixedly connected. When the U-shaped or splayed memory alloy wire 223 pulls the second bearing base 221 to move, it is more stable, so that the zoom and anti-shake performance of the lens module 200 is more stable.

Wherein, by connecting an external power source at both ends of each memory alloy wire 223 to energize, each memory alloy wire 223 can independently form a loop. When the external power source applies current to each memory alloy wire 223 differently, it can be Different lengths of each memory alloy wire 223 are changed, so that the displacements of the second bearing seat 221 relative to the first bearing seat 222 in different directions can be adjusted.

For example, as shown in FIG. 6 , on the one hand, when the lens module 200 needs a zoom function, the four memory alloy wires, namely the first memory alloy wire 2231 , the second memory alloy wire 2232 , the third memory alloy wire The same current is applied to the 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, thereby The four memory alloy wires together drive the second bearing seat 221 to move relative to the first bearing seat 222 along the direction of the second optical axis O2, thereby enabling the second lens 28 carried in the second bearing seat 221 to move along the second optical axis O2. The direction of the optical axis O2 is close to or away from the first lens 27 carried in the first bearing seat 222 , so that 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 needs the optical anti-shake compensation function due to the shaking of the mobile terminal 1, by independently applying currents of different magnitudes to the four memory alloy wires, the length variation of each memory alloy wire is controlled, so that the The second bearing seat 221 moves (translates) in a direction perpendicular to the second optical axis corresponding to the first bearing seat 221, or the second optical axis is inclined relative to the second optical axis O2, that is, the second bearing seat 221 is relative to the second optical axis O2. The first bearing seat 222 is inclined or deflected.

Exemplarily, when the lens module 200 needs to perform translational compensation in a direction perpendicular to the second optical axis O2 due to jitter, a current can be applied to only any one of the memory alloy wires 223 on one axis to change a plurality of memory alloy wires. The length of one of the memory alloy wires 223 in the 223 is shortened (for example, shortened), the lengths of the other three memory alloy wires remain unchanged, and since the memory alloy wires 223 are inclined relative to the second optical axis O2 The memory alloy wire 223 will pull the second bearing seat 221 to translate relative to the first bearing seat 222 in a direction substantially perpendicular to the second optical axis O2, so as to realize translation shake compensation.

For example, when the lens module 200 needs to perform displacement compensation in the positive direction of the X-axis due to jitter, the 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, and the other three No current is applied to each memory alloy (the second memory alloy wire 2232, the third memory alloy wire 2233, the fourth memory alloy wire 2234), so that the length of the first memory alloy wire 2231 is shortened, the second memory alloy wire 2232, the third memory alloy wire 2232, the third memory alloy wire The lengths of the memory alloy wire 2233 and the fourth memory alloy wire 2234 remain unchanged, and since the first memory alloy wire 2231 is inclined relative to the second optical axis O2, the first memory alloy wire 2231 pulls the second support base 221 relative to the second optical axis O2. The first bearing base 222 translates in the X-axis direction to complete 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, the displacement compensation amount can only be applied to the second memory alloy wire 2232 in the negative direction of the X-axis. Corresponding current, while the remaining three memory alloy wires (the first memory alloy wire 2231, the third memory alloy wire 2233, the fourth memory alloy wire 2234) do not apply current, so that the length of the second memory alloy wire 2232 becomes shorter, The lengths of the first memory alloy wire 2231, the third memory alloy wire 2233, and the fourth memory alloy wire 2234 remain unchanged, and since the second memory alloy wire 2232 is inclined relative to the second optical axis O2, the second memory alloy wire 2232 is inclined The wire 2232 pulls the second bearing base 221 to translate relative to the first bearing base 222 in the negative direction of the X-axis, so as 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 jitter, the principle is the same as the above-mentioned principles in the positive and negative directions of the X-axis, and will not be repeated.

In addition, when the lens module 200 needs to rotate the second bearing base 221 around one axis due to the jitter, different currents can be applied to the memory alloy wires 223 arranged opposite to each other, so that the opposite deformation amounts are generated, and the memory alloy wires 223 in other axes can be stored in the opposite direction. The amount of deformation of the alloy wire 223 remains unchanged.

For example, when the lens module 200 needs to rotate the second bearing base 221 around the X axis due to the jitter, different currents are applied to the second memory alloy wire 2232 and the fourth memory alloy wire 2234 disposed relative to the Y axis, so that the It produces 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 bearing base 221 to rotate around the X-axis, In order to compensate 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 bearing base 221 around the Y axis due to the jitter, different currents are applied to the first memory alloy wire 2231 and the third memory alloy wire 2233 disposed relative to the X axis, so that the The opposite deformation amount, 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 bearing base to rotate around the Y axis, so that the first memory alloy wire 2231 can rotate around the Y-axis. The inclination angles of the two optical axes O2 relative to the first optical axis O1 in the Y-axis direction.

To sum up, in the lens module 200 of the present disclosure, the second bearing base 221 can translate relative to the first bearing base 222 in the three axes of the X-axis, the Y-axis and the Z-axis, and can rotate around the X-axis and the Y-axis, That is, the second bearing seat 221 can realize five degrees of freedom in the axial direction relative to the first bearing seat 222 , which can further effectively improve the zooming and anti-shake performance of the lens module 200 .

In some embodiments, as shown in FIG. 7 , the lens module 200 further includes at least two sets of first fixing members 224 and at least two second fixing members 225 . The first fixing member 224 is fixed on the first bearing base 222 , and two ends of a memory alloy wire 223 are respectively fixedly connected to a set of first fixing members 224 . Both ends of a memory alloy wire 223 are fixedly connected to a set of first fixing members 224 respectively. Exemplarily, the first fixing members 224 are arranged in four groups, each group of the first fixing members 224 can be fixed on the lower surface of the first bearing base 222 , and the two ends of the four memory alloy wires are respectively connected with each group of the first fixing members 224 Fixed connection.

The second fixing member 225 is fixed on the lower surface of the second bearing base 221 , and the second bearing base 221 is provided with a through hole corresponding to the second fixing member 225 , a memory alloy wire 223 passes through the through hole, and the middle part is fixed to the second fixing member 225 . A second fixture 225. Exemplarily, there are four second fixing members 225 , and the middle portion of one memory alloy wire is wound around 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 portion of the memory alloy wire 223 may be embedded in the fixing groove (groove line) to prevent the memory alloy wire 223 from pulling the second fixing member 225. 223 and the second fixing member 225 slide relative to each other.

In one embodiment, the number of a set of first fixing members 224 is two, the first fixing member 224 has a crimping portion, and one crimping portion crimps and fixes one end of a memory alloy wire 223, that is, a memory alloy wire Both ends of the wire 223 are crimped and fixed to the two crimping portions, respectively. The first fixing member 224 can be made of metal material, 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 under the base 21 , and the 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 for imaging.

As shown in FIG. 6 , the first elastic piece 231 has a first inner fixing portion (not shown), a first elastic arm 2311 extending outward from the first inner fixing portion, and a first elastic arm 2311 extending from the first inner fixing portion. Two elastic arms 2312; the first inner fixing portion is fixed on the upper surface of the second bearing base 221, the end of the first elastic arm 2311 is fixed on the lower surface of the first bearing base 222, and the end of the second elastic arm 2312 is fixed on the The base 21 is, for example, fixed to the branch of the base 21 .

The first elastic piece 231 has a hollow structure for light transmission. The area of the cross-section (the cross-section perpendicular to the optical axis) of the hollow portion of the first elastic piece 231 is larger than the surface area of the lens in the lens module 200 , so as to prevent blocking light from affecting the imaging quality. For example, the first elastic piece 231 may have a hollow annular shape.

The second bearing seat 221 is connected with the base 21 through the first elastic piece 231 , so that the second bearing seat 221 is movably connected with the base, and can be returned by the first elastic arm 2311 and the second elastic arm 2312 of the first elastic piece 231 .

In one embodiment, the first elastic piece 231 includes at least two first parts separated from each other, that is, at least two sections, and the at least two first parts are arranged at intervals along the circumference of the second bearing seat 221 . The first elastic piece 231 may be made of metal. The number of the first elastic 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. Exemplarily, the first elastic piece 231 includes four parts, that is, four segments are arranged at intervals along the circumferential direction of the second bearing seat 221 . For example, at least two first parts separated from each other can constitute a complete first elastic piece 231 , wherein each first part may include part of the first inner side fixing part, and some of the first parts may further include the first elastic arm 2311 and The 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 shown), a third elastic arm (not shown) extending outward from the second inner fixing portion, and the second inner fixing portion is fixed to the first bearing seat 222 On the upper surface, the end of the third elastic arm is fixed to the branch of the base 21 .

The second elastic piece 232 has a hollow structure for light transmission. The area of the cross-section (the cross-section perpendicular to the optical axis) of the hollow portion of the second elastic sheet 232 is larger than the surface area of the lens in the lens module 200 , so as to prevent blocking light from affecting the imaging quality. For example, the second elastic piece 232 may have a hollow annular shape.

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

In one embodiment, the first elastic piece 231 and the second elastic piece 232 are electrically connected to two ends of the corresponding memory alloy wire 223 respectively, that is, in one memory alloy wire, one end of the first elastic piece 231 is electrically connected to each other. The other end is electrically connected with the second elastic piece 232 . Thus each memory alloy wire 223 forms an independent loop. For example, the first elastic piece 231 and the second elastic piece 232 are respectively electrically connected to the first fixing members 224 at both ends of the memory alloy wire 223 through wires. The first elastic piece 231 may be connected to the positive pole of the external power supply, and the second elastic piece 232 may be connected to the negative pole of the external power supply. Alternatively, the first elastic piece 231 may be connected to the negative pole of the external power supply, and the second elastic piece 232 may be connected to the positive pole of the external power supply.

The connection wires between the first elastic sheet 231 and the second elastic sheet 232 and the external power supply can be embedded in the base 21 by means of embedding, so as to avoid the connection wires being too long and winding.

The first electrical connection point between the connection line of the external power supply (eg, the positive line) and the first elastic piece 231 may be the end of the first elastic arm 2311 of the first elastic piece 231 or the end of the second elastic arm 2312, that is, the first electrical connection point. The connection point and the end of the first elastic arm 2311 are fixed to the lower surface of the first bearing base 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 together. The second connection point between the connection wire of the external power supply (eg, the negative wire) and the second elastic piece 232 may be the end of the third elastic arm of the second elastic piece 232 , that is, the second connection point and the end of the third elastic arm are fixed together at the branch of the base 21 . Therefore, the external power connection wire will not move due to the movement of the first bearing seat 222 and the second bearing seat 221, thereby ensuring the reliability of the electrical connection.

The memory alloy wire 223 is electrically connected through the first elastic sheet 231 and the second elastic sheet 232. Since the first elastic sheet 231 and the second elastic sheet 232 are made of metal and the distance from the memory alloy wire 223 is relatively short, it is possible to avoid the arrangement of excessively long wires. , resulting in the possibility that the power is cut off when the second bearing seat 221 moves relative to the first bearing seat 222 , which can improve the reliability of the lens module 200 .

As shown in FIG. 3 , 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 base 222 , and at least one pair of magnets 242 is disposed opposite to the outer side of the coil 241 . A plurality of magnets 242 can also be provided, and they are provided on the outer side of the coils 241 in pairs corresponding to each other. The interaction between the magnetic field generated by the current applied to the coil 241 and the magnetic poles of the magnet 242 drives the first bearing seat 222 and the second bearing seat 221 to move along the optical axis direction of the lens module 200 , so that the lens module 200 The relative displacement is generated with respect to the photosensitive element under the base 21 , so as to realize the focusing function of the lens module 200 .

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

In one embodiment, the lens module 200 further includes a casing 26 for protecting the internal components. The casing 26 is fastened and fixed on the base 21 to form a space for accommodating the internal components of the lens module. The casing 26 has a through hole whose central axis is substantially coincident with the first optical axis O1 , and the lens barrel accommodating one or more first lenses 27 can pass through the through hole of the casing 26 . In addition, a spacer 25 is also disposed between the casing 26 and the second elastic piece 232 to play a buffering role when the first bearing base 222 moves in the direction of the optical axis.

The magnet 242 can be fixed on the inner side wall of the casing 26, but not limited thereto, the magnet 242 can 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 FIG. 8 , in summary, the above-mentioned focusing function can send a control command to the driver circuit (Driver IC) 102 through the processing chip (AP/SOC) 101 in the mobile terminal 1 , and the driver circuit 102 can control the flow rate flowing into the coil 242 through the driver circuit 102 . The magnitude of the current is used to adjust the displacement required for the focusing (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 disposed inside the mobile terminal 1, and the driver IC (Driver IC) 102 inside the mobile terminal 1 calculates the jitter offset information according to the The deflection amount and deflection direction caused by the jitter are obtained, so as to control the deformation amount required by the plurality of memory alloy wires (SMA) 223 according to the deflection amount and deflection direction of the jitter, so as to compensate for the deflection amount and deflection direction of the jitter, So as to achieve the purpose of anti-shake.

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

The mobile terminal 1 may be a mobile phone, a notebook computer, a tablet computer, a wearable device, a camera, a video camera, a driving recorder, or other device having a photographing or video recording function.

By setting the lens module 200 of the present disclosure, the mobile terminal of the present disclosure can realize the functions of zooming and optical anti-shake, and the performance is greatly improved.

It should be understood that in the present disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And/or", which describes the association relationship of the associated objects, means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the associated objects are an "or" relationship. The singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise.

It is further understood that the terms "first", "second", etc. are used to describe various information, but the information should not be limited to these terms. These terms are only used to distinguish the same type of information from one another, and do not imply a particular order or level of importance. In fact, the expressions "first", "second" etc. are used completely interchangeably. For example, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information, without departing from the scope of the present disclosure.

It is further understood that the terms "center", "portrait", "horizontal", "front", "rear", "top", "bottom", "left", "right", "vertical", "horizontal" "," "top", "bottom", "inside", "outside" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this embodiment and simplifying the description, rather than indicating Or imply that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation.

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

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

Other embodiments of the present disclosure will readily suggest themselves to those skilled in the art upon consideration of the specification and practice of 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 techniques in the technical field not disclosed by the present disclosure . The specification and examples are to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

It is to be understood that the present disclosure is not limited to the precise structures described above and illustrated in the accompanying 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 lens holder comprises a first bearing seat, a second bearing seat and a lens, wherein at least one first lens is arranged in the first bearing seat and 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;

at least two memory alloy wires respectively connected with the first bearing seat and the second 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 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 that the second optical axis is inclined relative to the first optical axis.

2. The lens module as recited in claim 1,

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

3. The lens module as recited in claim 2,

the memory alloy wires are at least four and are respectively positioned on the periphery of the second bearing seat and arranged in pairs in an opposite mode.

4. The lens module as recited in claim 1,

the memory alloy wire is arranged in a U shape or an Contraband shape, the end parts of the two ends of the memory alloy wire are respectively and fixedly connected with the first bearing seat, and the middle part of the memory alloy wire is fixedly connected with the second bearing seat.

5. The lens module as claimed in claim 4, further comprising:

the memory alloy wire comprises at least two groups of first fixing pieces, wherein the first fixing pieces are fixed on the first bearing seat, and the end parts of two ends of one memory alloy wire are respectively fixedly connected with one group of first fixing pieces;

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; and one memory alloy wire passes through the through hole, and the middle part of the memory alloy wire is fixed on one second fixing piece.

6. The lens module as recited in claim 5,

the number of the group 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 as claimed in claim 1, further comprising:

the base is positioned below the second bearing seat;

the first elastic sheet is provided with a first inner side fixing part, a first elastic arm extending outwards from the first inner side fixing part and a second elastic arm extending out from the first elastic arm;

the first inner side 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 as claimed in claim 7, further comprising:

the second elastic sheet is provided with a second inner side fixing part and a third elastic arm extending outwards from the second inner side fixing part, the second inner side 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,

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

10. The lens module as recited in claim 9,

the second elastic sheet comprises at least two second parts which are separated from each other, 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,

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

12. The lens module as claimed in claim 7, further comprising:

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

and at least one pair of magnets oppositely arranged outside the coil.

13. A mobile terminal, comprising:

a terminal body; and

the lens module as claimed in any one of claims 1 to 12, wherein the lens module is disposed on the terminal body.

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