CN215953943U - Lens driving device, image pickup device, and mobile terminal - Google Patents

Abstract

The utility model provides a lens driving device, an image pickup device and a mobile terminal. The lens driving device includes: a housing; the shell is covered on the base, an accommodating space is formed between the shell and the base, and the base is provided with a first guide structure; the lens seat is movably arranged in the accommodating space and is provided with a second guide structure matched with the first guide structure; the elastic support component is supported between the lens mount and the base or between the lens mount and the shell, and the elastic support component is electrified to enable at least one part of the elastic support component to deform and drive the lens mount to move along the Z-axis direction; the elastic sheet is arranged on one side, far away from the elastic support component, of the lens mount and is connected with the first guide structure, so that the lens mount provides a reset force moving towards one side of the elastic support body. The utility model solves the problem of poor use performance of the driving device of the camera shooting device in the prior art.

Description

Lens driving device, image pickup device, and mobile terminal

Technical Field

The present invention relates to the field of imaging devices, and in particular, to a lens driving device, an imaging device, and a mobile terminal.

Background

Video cameras, or still cameras, typically employ a lens that is adjustable in focal length or auto-focus, and the adjustment is performed by changing the position of the lens, typically by a drive motor, to drive the lens for movement. At present, the automatic focusing of a camera head of a handheld camera device, especially a mobile phone, is basically completed by using a Voice Coil Motor (VCM), which is a system composed of a Coil and a magnet. The coil after being electrified is subjected to electromagnetic force in a magnetic field, the winding carrier is driven to linearly move along the optical axis direction (namely Z axis) of the lens under the action of the electromagnetic force, and the winding carrier finally stays at a position point when the resultant force of the electromagnetic force generated between the annular coil and the driving magnet and the elastic force of the upper spring and the lower spring reaches a phase equilibrium state.

Although the voice coil motor has the advantages of mature technology, low cost, low noise and the like, along with the increase of the requirement of the camera device on the camera shooting, the voice coil motor has the problems of magnetic interference, insufficient thrust and unstable structure and performance. For example: the double-shooting motor is developed and applied to various middle and high-end mobile phones, but certain puzzlement difficulty exists in the practical application process, particularly, a certain degree of magnetic interference phenomenon exists between two double-shooting motors, the normal performance of the effect of the double-shooting motors is influenced, the defect cannot be avoided by the voice coil motor, and meanwhile, various improvement schemes are easy to cause the complexity of the motor structure and the improvement of the assembly process difficulty; electric conduction and connection assembly among all parts in the voice coil motor are realized through modes such as welding, hot riveting, point gluing, coil circular telegram needs to be through last/lower spring intercommunication simultaneously, the route that leads to coil circular telegram is longer, because voice coil motor part number is more, need welding, hot riveting, point gluing department is more, when the cell-phone is in case receiving external force such as falling the striking, the motor is because external force vibrates and leads to inside welding point or point gluing department to pull phenomenon such as drop or spring deformation easily, the inside electric property of final motor and integrated configuration receive destruction, influence the performance of motor normal performance, bring unfavorable consequence for the shooting effect.

Therefore, the driving device of the imaging device in the prior art has the problem of poor usability.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a lens driving device, an image pickup device and a mobile terminal, so as to solve the problem that the driving device of the image pickup device in the prior art is poor in use performance.

In order to achieve the above object, according to one aspect of the present invention, there is provided a lens driving device including: a housing; the shell is covered on the base, an accommodating space is formed between the shell and the base, and the base is provided with a first guide structure; the lens seat is movably arranged in the accommodating space and is provided with a second guide structure matched with the first guide structure; the elastic support component is supported between the lens mount and the base or between the lens mount and the shell, and the elastic support component is electrified to enable at least one part of the elastic support component to deform and drive the lens mount to move along the Z-axis direction; the elastic sheet is arranged on one side, far away from the elastic supporting component, of the lens mount and connected with the first guide structure, so that the lens mount provides a reset force moving towards one side of the elastic supporting component.

Furthermore, the first guide structure comprises a positioning column extending towards the lens mount, the positioning column is provided with a limiting surface facing the second guide structure, and one end of the second guide structure is arranged opposite to the limiting surface.

Furthermore, the elastic supporting component is supported between the lens mount and the base, and the elastic sheet is connected with one end of the positioning column, which is far away from the base.

Furthermore, each corner of the base is provided with at least one positioning column respectively, the number of the second guide structures is multiple, and each second guide structure corresponds to at least one positioning column.

Furthermore, the second guide structure is a guide protrusion arranged at the corner of the lens mount, and one end, far away from the lens mount, of the guide protrusion is arranged opposite to the limiting surface.

Further, the direction is protruding including connecting in order and being the first section and the second section that the angle set up, and the one end that the second section was kept away from to the first section is connected with the lens mount, and the one end that the first section was kept away from to the second section sets up with spacing face relatively.

Furthermore, one end of the second section, which is far away from the first section, is provided with a limiting section.

Further, the lens mount includes: the cylindrical structure is internally used for accommodating the lens; the butt flange is arranged at one end, far away from the base, of the tubular structure, the elastic supporting assembly is sleeved on the outer peripheral side of the tubular structure, one end, far away from the base, of the elastic supporting assembly is in butt joint with the butt flange, and the second guiding structure is arranged at the corner of the butt flange.

Further, the first section and the second section are each formed by bending at the corner of the abutment flange.

Further, the length direction of the first section is the same as the direction of the Z axis and extends towards the cylindrical structure, and the length direction of the second section is perpendicular to the length direction of the first section.

Further, the shell fragment includes: the extrusion part is annular and is abutted with one side of the abutting flange, which is far away from the cylindrical structure; the connecting parts are multiple and correspond to the positioning columns one to one, one ends of the connecting parts are connected with the extrusion parts, and the other ends of the connecting parts are connected with the positioning columns.

Furthermore, the abutting flange is provided with at least one positioning protrusion corresponding to the extrusion part, and the extrusion part is provided with a positioning notch matched with the positioning protrusion.

Furthermore, the positioning bulges are multiple and are arranged at intervals relative to the circumferential direction of the extrusion part.

Furthermore, the one end that the base was kept away from to the reference column has the mounting groove, and the one end that extrusion portion was kept away from to connecting portion stretches into the mounting groove and is connected with the reference column.

Further, at least a part of the connecting part is provided with a telescopic section extending along the length direction of the connecting part.

Furthermore, the telescopic section is wavy.

Further, the elastic support assembly includes: an elastic support; the extrusion structure, the extrusion structure circular telegram in order to provide the extrusion force to the elastic support body, when the elastic support body receives the extrusion structure extrusion, the elastic support body produces deformation and drives the lens mount and follows the motion of Z axle direction.

Further, the extrusion structure includes: the SMA wire is wound on the circumferential outer side wall of the elastic support body; and the end pin assembly is arranged on the base, and two ends of the SMA wire are respectively connected with the end pin assembly.

Further, the lens driving device also comprises an FPC board which is electrically connected with the terminal pin assembly.

Furthermore, the elastic support body and the lens mount are of an integrally formed structure; and/or the lens mount and the elastic sheet are in an integrally formed structure.

According to another aspect of the present invention, there is provided an image pickup apparatus including the lens driving apparatus described above.

According to another aspect of the present invention, there is provided a mobile terminal including the above-described image pickup device.

By applying the technical scheme of the utility model, the lens driving device comprises a shell, a base, a lens mount, an elastic supporting component and an elastic sheet. The shell is covered on the base and forms an accommodating space with the base, and the base is provided with a first guide structure; the lens mount is movably arranged in the accommodating space and is provided with a second guide structure matched with the first guide structure; the elastic supporting component is supported between the lens mount and the base or between the lens mount and the shell, and the elastic supporting component is electrified to enable at least one part of the elastic supporting component to deform and drive the lens mount to move along the Z-axis direction; the shell fragment sets up and keeps away from the one side of elastic support component and is connected with first guide structure at the lens mount to provide the reset force of moving towards elastic support component one side for the lens mount.

When using the lens drive arrangement in this application, because camera lens drive arrangement has the lens mount, so can make mobile terminal's camera lens install on the lens mount to owing to still have the elastic support subassembly, so can drive the lens mount through the deformation of elastic support subassembly and remove, thereby drive the lens mount and produce the skew along the motion of Z axle direction or relative Z axle direction, and then realize the auto-focusing function. That is, in the present application, the driving coil and the driving magnet portion of the voice coil motor are replaced by the elastic support member of the lens driving apparatus. In addition, the lens driving device in the application is simpler than the structure of the existing voice coil motor because structures such as a spring matched with the driving magnet and the driving coil are not needed in the application. Meanwhile, no magnet exists, so that the problem of magnetic interference inside or outside is avoided. And, lens drive arrangement in this application does not have the magnetic circuit design problem, and whole stroke dynamics average thrust is great than the electromagnetism mode, consequently compares more efficient with current voice coil motor. And, there is not the upper and lower spring design of voice coil motor, falls and test such as cylinder and does not have spring deformation, nickel or foreign matter dropout problem. And because the elastic support component has a damping effect, the lens driving device in the application does not need to add damping glue. In the present application, since the lens mount is driven only by the elastic support member, fewer components are required as compared with the electromagnetic driving method of the voice coil motor, and therefore, it is possible to contribute to downsizing of the lens driving device. And, because lens drive arrangement still has the shell fragment in this application, when the elastic support subassembly does not provide the effort to the lens mount, the lens mount receives the effort of shell fragment to the atress direction of lens mount is directional one side of elastic support subassembly, that is to say that the shell fragment provides the pretightning force to the lens mount in this application, and after elastic support subassembly drive lens mount accomplished focusing, and when need make the lens mount reply to the position before focusing, the reset speed of lens mount can be accelerated to the effort of lens mount to the shell fragment, thereby can improve lens drive arrangement's response speed. Because the shell fragment only provides the elastic force for the lens mount, therefore the shell fragment need not be connected with electricity, consequently compares with traditional voice coil motor, lens drive arrangement in this application need not design complicated circuit structure. In addition, the first guide structure not only plays a role in guiding the lens seat, but also plays a role in fixing the elastic sheet, so that the structure of the base can be effectively simplified, and the lens driving device is convenient to assemble. Therefore, the lens driving device in the application effectively solves the problem that the driving device of the camera shooting device in the prior art is poor in use performance.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 shows an exploded view of a lens driving apparatus according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating a positional relationship between a spring plate and a lens holder of the lens driving apparatus according to the present application;

fig. 3 is a schematic structural view showing a lens mount of the lens driving device in the present application;

fig. 4 shows a schematic structural view of a base of the lens driving apparatus in the present application;

fig. 5 is a schematic diagram illustrating a positional relationship among the spring plate, the base, and the lens holder of the lens driving apparatus according to the present application.

Wherein the figures include the following reference numerals:

10. a housing; 20. a base; 21. a first guide structure; 211. a positioning column; 2111. a limiting surface; 2112. mounting grooves; 30. a lens mount; 31. a second guide structure; 311. a guide projection; 3111. a first stage; 3112. a second stage; 3113. limiting the section; 32. a tubular structure; 33. an abutment flange; 331. positioning the projection; 40. an elastic support member; 41. an elastic support; 42. extruding the structure; 421. SMA wire; 422. a terminal pin assembly; 50. a spring plate; 51. a pressing section; 511. positioning the notch; 52. a connecting portion; 521. a telescopic section; 60. a lens; 70. an FPC board.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the utility model.

In order to solve the problem that the driving device of the camera shooting device in the prior art is poor in service performance, the application provides a lens driving device, a camera shooting device and a mobile terminal.

Note that the mobile terminal in the present application has an image pickup device, and the image pickup device in the present application has a lens driving device described below.

As shown in fig. 1 to 5, the lens driving apparatus of the present application includes a housing 10, a base 20, a lens holder 30, an elastic support member 40, and a resilient sheet 50. The housing 10 covers the base 20 and forms an accommodating space with the base 20, and the base 20 is provided with a first guide structure 21; the lens holder 30 is movably arranged in the accommodating space, and the lens holder 30 is provided with a second guide structure 31 matched with the first guide structure 21; the elastic supporting component 40 is supported between the lens holder 30 and the base 20 or between the lens holder 30 and the housing 10, and the elastic supporting component 40 is powered on to deform at least one part of the elastic supporting component 40 and drive the lens holder 30 to move along the Z-axis direction; the elastic sheet 50 is disposed on a side of the lens holder 30 away from the elastic support assembly 40 and connected to the first guide structure 21 to provide a restoring force for the lens holder 30 to move toward the elastic support assembly.

When the lens driving device in the application is used, the lens driving device is provided with the lens mount 30, so that the lens of the mobile terminal can be installed on the lens mount 30, and the elastic supporting component 40 is further arranged, so that the lens mount 30 can be driven to move through the deformation of the elastic supporting component 40, the lens mount 30 is driven to move along the Z-axis direction or generate deflection relative to the Z-axis direction, and the automatic focusing function is further realized. That is, in the present application, the driving coil and the driving magnet portion of the voice coil motor are replaced by the elastic support member 40 of the lens driving apparatus. In addition, the lens driving device in the application is simpler than the structure of the existing voice coil motor because structures such as a spring matched with the driving magnet and the driving coil are not needed in the application. Meanwhile, no magnet exists, so that the problem of magnetic interference inside or outside is avoided. And, lens drive arrangement in this application does not have the magnetic circuit design problem, and whole stroke dynamics average thrust is great than the electromagnetism mode, consequently compares more efficient with current voice coil motor. And, there is not the upper and lower spring design of voice coil motor, falls and test such as cylinder and does not have spring deformation, nickel or foreign matter dropout problem. And since the elastic support member 40 itself has damping function, the lens driving device in this application does not need to add damping glue. In the present application, since the lens mount 30 is driven only by the elastic support member 40, fewer components are required as compared with the electromagnetic driving method of the voice coil motor, which can contribute to the miniaturization of the lens driving device. In addition, in the present application, since the lens driving device further includes the elastic sheet 50, when the elastic support assembly 40 does not provide an acting force to the lens holder 30, the lens holder 30 receives the acting force of the elastic sheet 50, and the force direction of the lens holder 30 points to one side of the elastic support assembly 40, that is, in the present application, the elastic sheet 50 provides a pre-tightening force to the lens holder 30, and when the elastic support assembly 40 drives the lens holder 30 to complete focusing and the lens holder 30 needs to return to the position before focusing, the acting force of the elastic sheet 50 to the lens holder 30 can accelerate the resetting speed of the lens holder 30, so as to improve the response speed of the lens driving device. Since the elastic sheet 50 only provides the elastic force for the lens holder 30, the elastic sheet 50 does not need to be electrically connected, and thus the lens driving apparatus in the present application does not need to design a complicated circuit structure compared to a conventional voice coil motor. In addition, since the first guide structure 21 in the present application not only guides the lens holder 30, but also fixes the elastic sheet 50, the structure of the base 20 can be effectively simplified, and the assembly of the lens driving device can be facilitated. Therefore, the lens driving device in the application effectively solves the problem that the driving device of the camera shooting device in the prior art is poor in use performance.

Specifically, the first guiding structure 21 includes a positioning column 211 extending toward the lens holder 30, the positioning column 211 has a limiting surface 2111 facing the second guiding structure 31, and one end of the second guiding structure 31 is disposed opposite to the limiting surface 2111. It should be noted that, in the present application, when the lens holder 30 moves normally under the action of the elastic support assembly 40, a movement gap exists between the first guide structure 21 and the second guide structure 31, or the first guide structure 21 and the second guide structure 31 are not in contact with each other, so that the resistance to the lens holder 30 during the movement process can be effectively reduced. When the movement of the lens holder 30 is deflected relative to the predetermined direction, the first guide structure 21 and the second guide structure 31 can contact and limit the deflection and torsion of the lens holder 30, so as to guide the lens holder 30.

Of course, the first guide structure 21 and the second guide structure 31 may be set in a contact state at all times according to actual use conditions.

Preferably, the elastic support assembly is supported between the lens holder 30 and the base 20, and the elastic piece 50 is connected to an end of the positioning column 211 away from the base 20.

Preferably, at least one positioning column 211 is respectively disposed at each corner of the base 20, the number of the second guiding structures 31 is plural, and each second guiding structure 31 corresponds to at least one positioning column 211. The stability of the lens holder 30 during movement can be effectively ensured by the arrangement.

In one specific embodiment of the present application, the second guiding structure 31 is a guiding protrusion 311 disposed at a corner of the lens holder 30, and an end of the guiding protrusion 311 away from the lens holder 30 is disposed opposite to the limiting surface 2111. And, guide protrusion 311 includes first section 3111 and second section 3112 that connect in order and be the angle setting, and the one end that first section 3111 keeps away from second section 3112 is connected with lens mount 30, and the one end that second section 3112 keeps away from first section 3111 sets up with spacing face 2111 relatively. Meanwhile, an end of the second section 3112 away from the first section 3111 has a limiting section 3113. By providing the limiting section 3113, when the first guide structure 21 contacts the second guide structure 31, the limiting section 3113 of the second section 3112 can contact the first guide structure, so as to increase the contact area between the first guide structure 21 and the second guide structure 31, thereby ensuring the stability of the movement of the lens holder 30.

Specifically, the lens holder 30 includes a cylindrical structure 32 and an abutment flange 33. The interior of the cylindrical structure 32 is used for accommodating the lens 60; the abutting flange 33 is arranged at one end of the cylindrical structure 32 far away from the base 20, the elastic supporting component is sleeved on the outer periphery side of the cylindrical structure 32, one end of the elastic supporting component far away from the base 20 abuts against the abutting flange 33, and the second guiding structure 31 is arranged at the corner of the abutting flange 33. In this embodiment, the tubular structure 32 is configured to accommodate not only the lens of the mobile terminal, but also to make the elastic supporting component 40 more easily fit on the lens holder 30, and to ensure that the elastic supporting component 40 fits with the tubular structure 32 more. And then can guarantee the one end of elastic support component 40 and butt flange 33 butt through setting up butt flange 33, can guarantee like this that elastic support component 40 produces the deformation back at the atress, elastic support component 40 can drive lens mount 30 and move together, and the condition that elastic support component 40 moved relative lens mount 30 can not appear to guarantee lens drive arrangement's stable performance.

Optionally, both the first section 3111 and the second section 3112 are bent at the corners of the abutment flange 33. Alternatively, the second guide structure 31 and the abutment flange 33 are of one-piece construction in the present application.

In one embodiment of the present application, the first section 3111 has a length direction that is the same as the Z-axis direction and extends toward the cylindrical structure 32, so that when the lens holder 30 moves along the Z-axis, the guide protrusion 311 of the lens holder 30 has a sufficient clearance space without an additional increase in the internal space of the lens driving device while performing a guiding function, and the second section 3112 has a length direction that is perpendicular to the length direction of the first section 3111.

In one embodiment of the present application, the resilient sheet 50 includes a pressing portion 51 and a connecting portion 52. The pressing part 51 is annular, and the pressing part 51 is abutted with one side of the abutting flange 33 away from the cylindrical structure 32; the number of the connecting portions 52 is plural, the connecting portions 52 correspond to the positioning posts 211 one by one, one end of each connecting portion 52 is connected to the pressing portion 51, and the other end of each connecting portion 52 is connected to the positioning posts 211. It should be noted that, in the present embodiment, the connecting portion 52 is extended out of the abutment flange 33 and connected to the positioning post 211, and therefore the positioning post 211 is disposed around the outer peripheral side of the lens holder 30 in the present application. In the prior art, the guide posts for guiding the lens mount 30 individually are generally provided on one side of the lens mount 30 on the inner peripheral side of the lens mount 30 so that the lens mount 30 can be fitted over the guide posts. Therefore, the lens driving device of the present application has a guiding function even though the guiding column is omitted compared to the lens driving device of the prior art, that is, the structure of the base 20 is simplified compared to the lens driving device of the prior art.

Specifically, the abutment flange 33 has at least one positioning projection 331 corresponding to the pressing portion 51, and the pressing portion 51 has a positioning notch 511 engaged with the positioning projection 331. The arrangement can effectively ensure the connection stability between the lens holder 30 and the elastic sheet 50, thereby preventing the separation between the elastic sheet 50 and the lens holder 30.

Preferably, the positioning protrusion 331 is plural, and the plural positioning protrusions 331 are disposed at intervals in the circumferential direction of the pressing portion 51. By such arrangement, the stress between the elastic sheet 50 and the lens holder 30 can be ensured to be more uniform.

Preferably, one end of the positioning column 211, which is far away from the base 20, has a mounting groove 2112, and one end of the connecting portion 52, which is far away from the pressing portion 51, extends into the mounting groove 2112 and is connected with the positioning column 211.

In one embodiment of the present application, at least a portion of the connecting portion 52 has a telescoping section 521 extending along its length. Moreover, the telescopic section 521 is wavy.

Specifically, the elastic support assembly 40 includes an elastic support body 41 and a pressing structure 42. The pressing structure 42 is powered on to provide a pressing force to the elastic supporting body 41, and when the elastic supporting body 41 is pressed by the pressing structure 42, the elastic supporting body 41 is deformed and drives the lens holder 30 to move along the Z-axis direction. That is to say, in the lens driving device in the present application, when the lens needs to be focused, the pressing structure 42 is powered on and presses the elastic supporting body 41, so that the lens holder 30 is driven to move by the deformation of the elastic supporting body 41, and the lens holder 30 can drive the lens to move along the Z-axis direction. Of course, the pressing structure 42 may be provided in other forms in the present application as long as the pressing structure 42 can be controlled to press the elastic support 41.

It should be pointed out that can also make camera device fall the impulsive force that the in-process received little through setting up elastic support body 41 in this application to can play certain buffering antivibration effect, simultaneously, fall and do not have nickel or foreign matter problem of droing with tests such as cylinder, can protect motor inner structure, also need not additionally to set up the damping again and glue, both simplify assembly process and can improve structural stability again.

Alternatively, the elastic support 41 is annular, and the elastic support 41 is sleeved on the periphery of the lens holder 30. Through setting up like this, not only can make things convenient for being connected of lens mount 30 and elastic support 41, can also guarantee that elastic support 41 produces the deformation back receiving the extrusion force of extrusion structure 42, lens mount 30 can more even atress to guarantee that the motion of lens mount 30 can not produce the skew, in order to guarantee mobile terminal's focusing effect and shooting effect. On the other hand, the elastic support 41 may be regarded as a ring, and the elastic support 41 may be configured to prevent dust, thereby improving the sealing performance of the lens driving device.

Of course, it should be noted that the shape of the elastic support 41 is not limited to a ring shape or a cylindrical shape in the present application, and the elastic support 41 may be provided in other shapes, such as a regular polygonal cylindrical structure 32, according to the actual design requirements.

Alternatively, the diameter of the middle portion of the elastic support 41 in the Z-axis direction is larger than the diameters of both ends of the elastic support 41. In the present application, the elastic supporting body 41 is configured to extend along the Z-axis direction mainly through the deformation of the middle portion, so that the elastic supporting body 41 can drive the lens holder 30 to achieve a large stroke driving. In addition, by means of the arrangement, after the elastic supporting body 41 is stressed to deform, the diameter of the middle part of the elastic supporting body 41 cannot be too small, so that the elastic supporting body is guaranteed not to deflect after being subjected to extrusion force, the stability of the elastic supporting body 41 is further guaranteed, the focusing stability of the lens supporting body is guaranteed, the shooting effect of the mobile terminal is guaranteed, and the shot image is prevented from being blurred.

Alternatively, the elastic support 41 is made of a silicone material or a rubber material. By such an arrangement, the overall weight of the lens driving device can be reduced, so that less force is required to drive the lens to move, and the sensitivity of the lens driving device can be improved.

Specifically, the pressing structure 42 includes: the SMA wire 421 is wound on the circumferential outer side wall of the elastic support body 41; and the terminal pin component 422, the terminal pin component 422 is arranged on the base 20, and two ends of the SMA wire 421 are respectively connected with the terminal pin component 422. In this embodiment, the input and output ends of the SMA wire 421 are electrically connected to the terminal pin assembly 422, and the connection between the SMA wire 421 and the terminal pin assembly 422 may be performed by welding or by using a clamping head, a buckle, or the like, as long as the connection stability between the input and output ends of the SMA wire 421 and the terminal pin assembly 422 is ensured.

Optionally, the lens driving device further comprises an FPC board 70, and the FPC board 70 is electrically connected to the terminal pin assembly 422.

Specifically, the elastic support 41 and the lens holder 30 are integrally formed.

Specifically, the lens holder 30 and the elastic sheet 50 are integrally formed.

When the elastic support 41, the lens holder 30 and the elastic sheet 50 are integrally designed, an elastic high-temperature resistant plastic material may be preferably used, such as: silica gel, PBT, and the like. The design can obviously reduce the number of the integral parts of the lens driving device, improve the assembly efficiency and the product yield, and simultaneously reduce the integral production cost of the lens driving device.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

1. the structure is simple, the assembly is easy, the circuit routing is simple, and the circuit is stable.

2. The absence of magnets does not create problems of magnetic interference, either internally or externally.

3. The design problem of a magnetic circuit is avoided, and the average thrust of the whole stroke is larger than that of a magnetoelectric mode and more efficient than that of the magnetoelectric mode.

4. The voice coil motor has no upper spring and lower spring design, and the problems of spring deformation and nickel or foreign matter falling do not occur when the voice coil motor falls and is tested by a roller and the like.

6. The elastic support body 41 has damping effect without adding damping glue.

7. The motor housing 10 can be made of plastic, which contributes to the gain of the mobile terminal antenna db.

8. The motor with different appearance structures can be manufactured.

9. The elastic support body 41 can also have the function of a dustproof ring, and the dustproof effect is better than that of a magnetoelectric mode.

10. The size and area of the finished motor products with the same lens diameter can be smaller than those of the finished motor products with the same lens diameter in a magnetoelectric mode.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (22)

1. A lens driving device, comprising:

a housing (10);

the shell (10) covers the base (20), an accommodating space is formed between the shell and the base (20), and the base (20) is provided with a first guide structure (21);

the lens holder (30), the lens holder (30) is movably arranged in the accommodating space, and the lens holder (30) is provided with a second guide structure (31) matched with the first guide structure (21);

the elastic supporting component (40), the elastic supporting component (40) is supported between the lens holder (30) and the base (20) or between the lens holder (30) and the shell (10), and the elastic supporting component (40) is electrified to deform at least one part of the elastic supporting component (40) and drive the lens holder (30) to move along the Z-axis direction;

the elastic sheet (50) is arranged on one side, away from the elastic support component (40), of the lens holder (30) and connected with the first guide structure (21) so as to provide a resetting force for the lens holder (30) to move towards one side of the elastic support component (40).

2. The lens driving device according to claim 1, wherein the first guiding structure (21) comprises a positioning post (211) extending towards the lens holder (30), the positioning post (211) having a position-limiting surface (2111) facing the second guiding structure (31), and one end of the second guiding structure (31) is disposed opposite to the position-limiting surface (2111).

3. The lens driving apparatus according to claim 2, wherein the elastic supporting member (40) is supported between the lens holder (30) and the base (20), and the resilient piece (50) is connected to an end of the positioning post (211) away from the base (20).

4. The lens driving device as claimed in claim 2, wherein at least one positioning post (211) is disposed at each corner of the base (20), the second guiding structure (31) is plural, and each second guiding structure (31) corresponds to at least one positioning post (211).

5. The lens driving device according to claim 4, wherein the second guiding structure (31) is a guiding protrusion (311) disposed at a corner of the lens holder (30), and an end of the guiding protrusion (311) away from the lens holder (30) is disposed opposite to the limiting surface (2111).

6. The lens driving device according to claim 5, wherein the guide protrusion (311) comprises a first section (3111) and a second section (3112) which are sequentially connected and arranged at an angle, one end of the first section (3111) far away from the second section (3112) is connected with the lens holder (30), and one end of the second section (3112) far away from the first section (3111) is arranged opposite to the limiting surface (2111).

7. Lens driving device according to claim 6, characterized in that the end of the second section (3112) remote from the first section (3111) has a stop profile (3113).

8. The lens driving device according to claim 6, wherein the lens holder (30) comprises:

a cylindrical structure (32), the interior of the cylindrical structure (32) is used for accommodating a lens (60);

an abutting flange (33), the abutting flange (33) is arranged at one end of the cylindrical structure (32) far away from the base (20), the elastic supporting component (40) is sleeved at the outer peripheral side of the cylindrical structure (32), one end of the elastic supporting component (40) far away from the base (20) is abutted with the abutting flange (33), and the second guiding structure (31) is arranged at the corner of the abutting flange (33).

9. The lens driving device according to claim 8, wherein the first segment (3111) and the second segment (3112) are each formed by bending at a corner of the abutment flange (33).

10. The lens driving device according to claim 8, wherein a longitudinal direction of the first segment (3111) is the same as a direction of the Z-axis and extends toward the cylindrical structure (32), and a longitudinal direction of the second segment (3112) is perpendicular to a longitudinal direction of the first segment (3111).

11. Lens driving device according to claim 8, characterized in that the spring (50) comprises:

a pressing portion (51), wherein the pressing portion (51) is annular, and the pressing portion (51) is abutted to one side, away from the cylindrical structure (32), of the abutting flange (33);

the connecting parts (52) are multiple, the connecting parts (52) correspond to the positioning columns (211) one by one, one end of each connecting part (52) is connected with the corresponding extrusion part (51), and the other end of each connecting part (52) is connected with the corresponding positioning column (211).

12. Lens driving device according to claim 11, wherein the abutment flange (33) has at least one positioning protrusion (331) corresponding to the pressing portion (51), the pressing portion (51) having a positioning notch (511) cooperating with the positioning protrusion (331).

13. The lens driving device according to claim 12, wherein the positioning projection (331) is plural, and the plural positioning projections (331) are provided at intervals in a circumferential direction of the pressing portion (51).

14. The lens driving device as claimed in claim 11, wherein an end of the positioning post (211) away from the base (20) has a mounting groove (2112), and an end of the connecting portion (52) away from the pressing portion (51) extends into the mounting groove (2112) and is connected to the positioning post (211).

15. Lens driving device according to claim 11, characterized in that at least a part of the connecting portion (52) has a telescopic section (521) extending in its length direction.

16. The lens driving device according to claim 15, wherein the telescopic section (521) has a wave shape.

17. Lens driving device according to any of claims 1 to 16, characterized in that the elastic support assembly (40) comprises:

an elastic support body (41);

the pressing structure (42), the pressing structure (42) circular telegram in order to elastic support body (41) provide the extrusion force, work as elastic support body (41) receive when pressing structure (42) extrudees, elastic support body (41) produce deformation and drive lens mount (30) are along the motion of Z axle direction.

18. The lens driving device according to claim 17, wherein the pressing structure (42) comprises:

the SMA wire (421) is wound on the circumferential outer side wall of the elastic support body (41);

and the end pin assembly (422), the end pin assembly (422) is arranged on the base (20), and two ends of the SMA wire (421) are respectively connected with the end pin assembly (422).

19. The lens driving device according to claim 18, further comprising an FPC board (70), wherein the FPC board (70) is electrically connected to the terminal pin assembly (422).

20. The lens driving device according to claim 17,

the elastic support body (41) and the lens holder (30) are of an integrally formed structure; and/or

The lens holder (30) and the elastic sheet (50) are of an integrally formed structure.

21. An image pickup apparatus characterized by comprising the lens driving apparatus according to any one of claims 1 to 20.

22. A mobile terminal characterized in that it comprises the camera device of claim 21.

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