阅读说明：本技术 一种透镜驱动马达、包含其的摄像装置及移动终端 (Lens driving motor, camera device comprising same and mobile terminal ) 是由 龚高峰 王建华 唐利新 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种透镜驱动马达、包含其的摄像装置及移动终端,所述透镜驱动马达包括绕线载体、驱动线圈、连接设置在所述绕线载体上方的上弹簧和连接设置在所述绕线载体下方的下弹簧、底座、盖设在所述底座上的外壳、以及设于所述外壳的相对内侧壁上的驱动磁石,所述透镜驱动马达还包括设于所述底座的霍尔芯片及设于所述绕线载体上的霍尔磁石,所述霍尔芯片与所述霍尔磁石沿Z轴光轴方向相对设置；其中,所述底座内埋设有电路连通结构,所述电路连通结构能够将所述霍尔芯片连通至电源、并且能够将所述霍尔芯片的电流信号传输至所述下弹簧,进而所述透镜驱动马达能够通过所述下弹簧向所述驱动线圈附加电流,并驱动所述绕线载体移动。(The invention discloses a lens driving motor, a camera device comprising the lens driving motor and a mobile terminal, wherein the lens driving motor comprises a winding carrier, a driving coil, an upper spring arranged above the winding carrier in a connecting manner, a lower spring arranged below the winding carrier in a connecting manner, a base, a shell covered on the base, and driving magnets arranged on the opposite inner side walls of the shell; the lens driving motor is characterized in that a circuit communicating structure is embedded in the base, the circuit communicating structure can communicate the Hall chip to a power supply and can transmit a current signal of the Hall chip to the lower spring, and then the lens driving motor can add current to the driving coil through the lower spring and drive the winding carrier to move.)

1. A lens driving motor is characterized by comprising a winding carrier for mounting a lens, a driving coil wound on the winding carrier, an upper spring connected and arranged above the winding carrier, a lower spring connected and arranged below the winding carrier, a base positioned below the lower spring, a shell covered on the base, and driving magnets arranged on the opposite inner side walls of the shell, and further comprising a Hall chip arranged on the base and Hall magnets arranged on the winding carrier, wherein the Hall chip and the Hall magnets are oppositely arranged along the optical axis direction of a Z axis; the lens driving motor is characterized in that a circuit communicating structure is embedded in the base, the circuit communicating structure can communicate the Hall chip to a power supply and can transmit a current signal of the Hall chip to the lower spring, and then the lens driving motor can add current to the driving coil through the lower spring and drive the winding carrier to move.

2. The lens driving motor of claim 1, wherein the circuit connection structure buried in the base includes a wire line for connecting the hall chip to a power source and a lead line for transmitting a current signal of the hall chip to the lower spring.

3. The lens driving motor of claim 2, wherein the hall chip is disposed in a notch portion on the base, the wire line includes two wires having two ends in the notch portion, and four terminal pins for electrically connecting with the hall chip; the lead line comprises two sections of leads, and each section of lead is provided with a bridging end in the notch part and used for being electrically connected with the Hall chip.

4. The lens driving motor of claim 3, wherein the Hall chip is provided with Hall elements SDA \ SCL \ VCC \ VDD \ OUT1\ OUT2 to realize closed-loop control; the Hall elements VDD and VSS are respectively communicated with the terminal pin at one end of the two leads, the Hall elements SDA and SCL are respectively communicated with the terminal pin at the other end of the two leads, and the Hall elements OUT1 and OUT2 are respectively communicated with the bridge end of each lead.

5. The lens driving motor of claim 3 or 4, wherein the lower spring is divided into two sections, each section having a welding site thereon; and the other bridging end of each section of the lead is provided with a bonding pad, and the bonding pads are respectively welded with one welding phase of the lower spring to realize circuit communication.

6. The lens driving motor according to claim 5, wherein each of the segments of the lower spring is further provided with at least one spot weld, wherein the spot weld on one segment communicates with the coil start line of the driving coil at the start line hooking pole of the driving coil, and the spot weld on the other segment communicates with the coil end line of the driving coil at the end line hooking pole of the driving coil.

7. The lens driving motor of claim 1, wherein the hall magnet is provided in a notch portion of the bobbin.

8. The lens driving motor of claim 1, wherein the upper spring has an outer ring and an inner ring, and a spring wire connecting the outer ring and the inner ring, the spring wire having at least one wrist portion, the at least one wrist portion of the spring wire being coated with a damping paste, the damping paste bridging between two segments of the same spring wire; and/or the lower spring is provided with a connecting part and an inner ring which are positioned at four corners, and a spring wire which connects the connecting part and the inner ring, wherein the spring wire is provided with at least one wrist part, the wrist part at least of the spring wire is coated with damping glue, and the damping glue is bridged between two sections of the same spring wire.

9. The lens driving motor of claim 8, wherein the outer race of the upper spring is coupled to the inner surface of the housing, and the inner race of the upper spring is coupled to an upper end surface of the bobbin.

10. The lens driving motor according to claim 8 or 9, wherein the connecting portion of the lower spring is connected to an upper end surface of the base, and the inner race of the lower spring is connected to a lower end surface of the bobbin carrier.

11. An image pickup apparatus provided with the lens driving motor according to any one of claims 1 to 10.

12. A mobile terminal characterized by being provided with the lens driving motor according to any one of claims 1 to 10.

Technical Field

The present invention relates to a lens driving motor applicable to a camera function of a mobile phone, and a camera device and a mobile terminal including the same.

Background

Autofocus is a widely used function in cameras. Auto-focus can be used in cell phones, hand-held cameras, and surveillance cameras, still cameras, and video cameras.

A lens driving motor is a device used on an auto-focus camera of a portable terminal device such as a mobile phone, a closed-loop motor is a type generally employed in an existing lens driving motor, and patent document CN106443949A discloses a structure of a lens driving device as a closed-loop motor, in which a hall chip is disposed in a PCB (flexible printed circuit board) and is mounted to the circuit board by body bonding, and is connected to a power source terminal through a flexible printed circuit inside the PCB. However, this structure has the disadvantages of high cost and inconvenient assembly.

Disclosure of Invention

The invention provides a lens driving motor, a camera device comprising the same and a mobile terminal.

The technical scheme of the invention is as follows:

a lens driving motor comprises a winding carrier for mounting a lens, a driving coil wound on the winding carrier, an upper spring connected and arranged above the winding carrier, a lower spring connected and arranged below the winding carrier, a base positioned below the lower spring, a shell covered on the base, and driving magnets arranged on the opposite inner side walls of the shell, and further comprises a Hall chip arranged on the base and Hall magnets arranged on the winding carrier, wherein the Hall chip and the Hall magnets are oppositely arranged along the optical axis direction of a Z axis; the lens driving motor is characterized in that a circuit communicating structure is embedded in the base, the circuit communicating structure can communicate the Hall chip to a power supply and can transmit a current signal of the Hall chip to the lower spring, and then the lens driving motor can add current to the driving coil through the lower spring and drive the winding carrier to move.

As a preferable aspect of the lens driving motor of the present invention, the circuit connection structure embedded in the base includes a lead line for connecting the hall chip to a power supply, and a lead line for transmitting a current signal of the hall chip to the lower spring.

As a preferable example of the lens driving motor of the present invention, the hall chip is disposed in a notch portion on the base, the wire line includes two wires, the two wires have two ends in the notch portion, and have four terminal pins in total, which are used to electrically connect with the hall chip; the lead line comprises two sections of leads, and each section of lead is provided with a bridging end in the notch part and used for being electrically connected with the Hall chip.

As a preferred embodiment of the lens driving motor, a hall element SDA \ SCL \ VCC \ VDD \ OUT1\ OUT2 is disposed on the hall chip to realize closed-loop control; the Hall elements VDD and VSS are respectively communicated with the terminal pin at one end of the two leads, the Hall elements SDA and SCL are respectively communicated with the terminal pin at the other end of the two leads, and the Hall elements OUT1 and OUT2 are respectively communicated with the bridge end of each lead.

As a preferable aspect of the lens driving motor of the present invention, the lower spring is divided into two sections, each of which has a welding position; and the other bridging end of each section of the lead is respectively welded with one welding position of the lower spring to realize circuit communication.

In the lens driving motor according to the present invention, it is preferable that each of the sections of the lower spring further includes at least one spot weld, wherein the spot weld on one section communicates with the coil start line of the driving coil at the start line hooking pole of the driving coil, and the spot weld on the other section communicates with the coil end line of the driving coil at the end line hooking pole of the driving coil.

In the lens driving motor according to the present invention, preferably, the hall magnet is provided in a notch portion of the bobbin.

As a preferable aspect of the lens driving motor of the present invention, the upper spring has an outer ring and an inner ring, and a spring wire connecting the outer ring and the inner ring, the spring wire has at least one wrist portion, at least one wrist portion of the spring wire is coated with a damping adhesive, and the damping adhesive is bridged between two sections of the same spring wire; and/or the lower spring is provided with a connecting part and an inner ring which are positioned at four corners, and a spring wire which connects the connecting part and the inner ring, wherein the spring wire is provided with at least one wrist part, the wrist part at least of the spring wire is coated with damping glue, and the damping glue is bridged between two sections of the same spring wire.

In the lens driving motor according to the present invention, it is preferable that the outer ring of the upper spring is connected to an inner surface of the housing, and the inner ring of the upper spring is connected to an upper end surface of the winding carrier.

In the lens driving motor according to the present invention, it is preferable that the connecting portion of the lower spring is connected to an upper end surface of the base, and the inner ring of the lower spring is connected to a lower end surface of the winding carrier.

The present invention also provides an image pickup apparatus provided with any one of the above lens driving motors.

The invention also provides a mobile terminal which is provided with the lens driving motor.

Compared with the prior art, the invention has the following beneficial effects:

firstly, a closed-loop control function is realized without a PCB (printed Circuit Board) in the structural design, the product structure is further simplified, and the assembly and low-cost control are facilitated;

secondly, accurately controlling the position of the lens module;

thirdly, convergence to the control position of the lens module is quicker, detection time is shortened, and photographing experience of a user is improved;

fourthly, the yield and the quality of the product are improved, and the loss is reduced;

and fifthly, a low-cost closed-loop control function is introduced on the basis of the open-loop motor, so that rapid and accurate focusing is realized.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

FIG. 1 is an exploded view of one embodiment of a lens driving motor according to the present invention;

FIG. 2 is an assembled schematic view of the embodiment of the lens driving motor shown in FIG. 1 according to the present invention;

FIG. 3 is a schematic diagram of an embodiment of an upper spring of the lens driving motor of the present invention;

FIG. 4 is a schematic diagram of an embodiment of a lower spring of the lens driving motor of the present invention;

FIG. 5 is a schematic view of a base and a lower spring mounted together in an embodiment of a lens driving motor of the present invention, showing a top view of the base;

FIG. 6 is a schematic view showing the arrangement of a driving magnet and an upper spring in a housing in an embodiment of a lens driving motor according to the present invention;

FIG. 7 is a schematic view of a bobbin carrier and a lower spring in an embodiment of a lens driving motor of the present invention, showing a bottom view of the bobbin carrier;

FIG. 8 is a schematic view showing the arrangement positions of a Hall magnet and a Hall chip in an embodiment of a lens driving motor according to the present invention;

FIG. 9 is a schematic view of a circuit connection structure embedded in a base in an embodiment of a lens driving motor of the present invention;

FIG. 10 is a schematic diagram of a Hall chip electrically connected to a terminal port of a lead line and two bridge terminals of a lead line inside a base according to an embodiment of the lens driving motor of the present invention;

FIG. 11 is a schematic view showing the connection of the lower spring and the lead wire in the embodiment of the lens driving motor of the present invention;

FIG. 12 is a schematic diagram of the Hall chip electrically connected to two bridge terminals of the lead line of the conductive line inside the base according to the embodiment of the lens driving motor of the present invention;

FIG. 13 is a schematic bottom view of a Hall chip electrically connected to a terminal port of a lead line and two bridge terminals of lead lines inside a base according to an embodiment of the lens driving motor of the present invention;

FIG. 14 is a schematic diagram of a Hall chip in an embodiment of a lens driving motor of the present invention;

fig. 15 is a circuit path diagram of a lens module driving in an embodiment of the lens driving motor of the invention.

Detailed Description

The invention provides a lens driving motor, wherein a Hall chip in the motor is directly arranged on a base, and circuit feedback control of the Hall chip is realized under the condition of not needing components such as a PCB (printed Circuit Board) and the like by arranging a circuit communication mode in the base. Through the structure, compared with the conventional closed-loop motor, the lens driving motor provided by the invention omits a PCB (printed Circuit Board), further simplifies the product structure, and is beneficial to assembly and low-cost control.

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Examples

Referring to fig. 1, there is shown an exploded view of an exemplary structure of a lens driving motor of the present invention.

Referring to fig. 1, the lens driving motor mainly includes a winding carrier 1, a driving coil 2, an upper spring 3, a lower spring 4, a base 5, a housing 6, a driving magnet 7, a hall chip 8, and a hall magnet 9,

the housing 6 is covered on the base 5, and the winding carrier 1, the driving coil 2, the upper spring 3, the lower spring 4, the driving magnet 7, the hall chip 8 and the hall magnet 9 are accommodated in an accommodating space formed by the housing 6 and the base 5, as shown in fig. 2;

the inner circular hollow position of the winding carrier 1 is used for mounting a lens (a lens is not shown), the winding carrier 1 is used as a movable component and can drive the lens to a target position, and the winding carrier 1 and the lens are jointly called as a lens module; the winding carrier 1 is provided with a starting wire hanging column 12 and a final wire hanging column 13, and the winding carrier 1 is also provided with a notch part 11 for accommodating a Hall magnet, please refer to FIG. 7;

the driving coil 2 is wound on the winding carrier 1, and the driving coil 2 is provided with a coil initial line arranged on the initial line hanging column 12 and a coil final line arranged on the final line hanging column 13; when current is added to the driving coil 2, electromagnetic force can be generated in the Z-axis optical axis direction to drive the winding carrier 1 to move along the Z-axis optical axis direction;

the upper spring 3 is arranged between the inner upper part of the shell 6 and the winding carrier 1, in particular, in the exemplary structure shown in fig. 3, the upper spring 3 is provided with an outer ring 31 and an inner ring 32, and a spring wire 33 connecting the outer ring 31 and the inner ring 32, wherein the outer ring 31 is fixedly arranged on the inner upper part of the shell 6, for example, fixedly connected or detachably connected, the inner ring 32 is fixedly connected with the upper end surface of the winding carrier 1 through a mounting hole 321 on the inner ring, for example, fixedly connected or detachably connected, and the inner ring 32 moves along with the winding carrier 1 through the tension spring wire 33;

the lower spring 4 is positioned between the base 5 and the winding carrier 1; specifically, in the exemplary structure shown in fig. 4, the lower spring 4 has a quadrilateral structure, four corners of the quadrilateral structure are respectively provided with connecting portions 41a, 41b, 41c and 41d, each connecting portion is connected to the base 5 through a mounting hole 411 (only one of which is labeled in the figure) on the connecting portion, for example, the connecting portion is fixedly connected or detachably connected, and the lower spring 4 further has an inner ring 42, and the inner ring 42 is connected to the lower end face of the winding carrier 1, for example, fixedly connected or detachably connected. A spring wire 43 is respectively arranged between each connecting part at four corners of the lower spring 4 and the inner ring 42; the inner ring 42 is driven to move along with the winding carrier 1 through the tension spring wire 43; also, in the structure shown in fig. 4, the lower spring 4 is divided into two sections;

the lens driving device clamps and fixes the winding carrier 1 between the upper spring 3 and the lower spring 4 through the arrangement of the upper spring 3 and the lower spring 4. When the driving coil 2 is supplied with current, the electromagnetic force starts to act in the Z-axis optical axis direction (forward direction), the carrier 1 is driven to move, and at the same time when the carrier 1 starts to move, the wires of the upper spring 3 and the lower spring 4 are stretched, and an elastic force is generated, and the elastic force acts in the direction (backward direction) opposite to the electromagnetic force in the Z-axis optical axis direction, so that the position of the lens module and the distance of the forward movement are at the point where the electromagnetic force and the elastic force are balanced. Accordingly, by adjusting the amount of current applied to the driving coil 2, the amount of movement of the wound carrier 1 as the mover member can be determined;

the base 5 is arranged below the lower spring 4, and a notch 51 for accommodating the hall chip 8 is arranged on the base 5, as shown in fig. 5; in addition, the base 5 is internally provided with a circuit communication structure for connecting a power supply, and the circuit communication structure passes through the notch part 51 and has terminal pin pins in the notch part 51;

the driving magnets 7 are provided, for example, such that in the exemplary structure of fig. 1, the driving magnets 7 have two pieces, and the two pieces of driving magnets 7 are respectively assembled on two opposite inner side surfaces of the housing 6, as shown in fig. 6;

the hall chip 8 is disposed, for example, in the notch 51 on the base 5, please refer to fig. 1 and 5 in combination; the terminal pins of the circuit connection structure provided in the notch 51 of the base 5 can connect the hall chip 8 to the power supply, and can transmit the current signal of the hall chip 8 to the lower spring 4, so that the current can be applied to the driving coil 2 to drive the winding carrier 1 to move.

The hall magnet 9 is disposed, for example, in a manner of being buried in a notch portion 11 of the winding carrier 1, as shown in fig. 7;

the hall magnet 9 and the hall chip 8 are disposed opposite to each other along the Z-axis optical axis direction, see fig. 8.

For the upper spring 3, it is more preferable that each spring wire 33 has at least one wrist portion, and at least one wrist portion of at least one spring wire 33 is coated with a damping paste 34, and it is more preferable that damping pastes 34 are coated at a plurality of wrist portions of a plurality of spring wires 33, and the damping pastes 34 are bridged between two segments of the same spring wire 33, as shown in fig. 3. The arrangement of the damping glue has the function of buffering and damping, so that the lens driving motor can be driven more stably and smoothly.

For the lower spring 4, it is more preferable that each spring wire 43 has at least one wrist portion, and at least one wrist portion of at least one spring wire 43 is coated with damping paste 44, and it is more preferable that damping paste 44 is coated at a plurality of wrist portions of a plurality of spring wires 43, and the damping paste 44 is bridged between two segments of the same spring wire 43, as shown in fig. 4. The arrangement of the damping glue has the function of buffering and damping, so that the lens driving motor can be driven more stably and smoothly.

The circuit arrangement of the lens driving motor is as follows:

the circuit connection structure embedded inside the base 5 includes a wire line and a lead line, as shown in fig. 9, wherein the wire line includes two wires, the two wires have electrical connection ports 101, and two ends of the two wires in the notch portion 51 on the base 5 are respectively provided with two terminal pin pins, which are four terminal pin pins 102 in total, for connecting the hall chip 8 to a power supply. The conductive traces are usually metal conductive traces, and can be embedded and molded integrally in the base 5 by INSERT MOLDING (INSERT MOLDING). The lead line comprises two sections of leads, the leads are bridging leads, a bridging end 103 is arranged in the notch part of each section of lead and used for realizing electric connection with the Hall chip 8 arranged in the notch part 51 on the base 5 and leading out a current signal of the Hall chip 8, the other bridging end of each section of lead is respectively provided with a bonding pad 104a and a bonding pad 104b, and the bonding pads 104a and 104b are exposed out of the surface of the base 5. Fig. 10 is a schematic diagram showing the hall chip 8 electrically connected to the terminal pin 102 of the conductive line and the two bridge terminals 103 of the lead line.

The lower spring 4 is divided into two sections, each section is provided with a welding position, and specifically, the two welding positions are respectively positioned on two connecting parts 41c and 41d at four corners of the lower spring 4; the bonding pads 104a and 104b of each lead and the bonding positions on the connecting parts 41c and 41d of the lower spring 4 are respectively welded to realize circuit communication, and the current signal of the hall chip 8 is led out to the lower spring 4. More specifically, the laser hole 412 is formed in the welding position of the two connecting portions 41c and 41d (see fig. 11) of the lower spring 4, and the lead line is electrically connected to the circuit of the lower spring 4 by laser welding.

Fig. 12 is a schematic diagram showing the hall chip 8 and two bridge terminals 103 of the lead lines being conducted from another view angle.

Referring again to fig. 12 (see fig. 7 in combination), the winding carrier 1 has a start hanging post 12 and a finish hanging post 13, a spot weld 45 (see fig. 4 in combination) is provided on each segment of the lower spring 4, conductive solder paste is applied in the spot weld 45, the two spot welds 45 are respectively connected with the start coil line and the finish coil line of the driving coil 2 at the start hanging post 12 and the finish hanging post 13, so that the driving coil 2 is electrically communicated with the lower spring 4, and the driving coil 2 can be electrically driven by the hall chip 8 through the lower spring 4. After the power is switched on, the power-on driving coil 2 interacts with the driving magnet 7 in the driving circuit to form electromagnetic force, and the winding carrier 1 is pushed to drive the lens to be driven in the Z-axis direction, so that automatic focusing is realized. The number of spot welds provided is for exemplary purposes only and other numbers of spot welds may be selected by one skilled in the art based on the above teachings.

Referring to fig. 13, four terminal pins 102 are electrically connected to the hall chip 8.

Referring to fig. 14, the hall chip 8 integrates a hall sensor and a control portion, specifically, the hall chip 8 has a plurality of hall elements SDA \ SCL \ VCC \ VDD \ OUT1\ OUT2, and the closed-loop control is realized by the comprehensive functions of the hall elements SDA \ SCL \ VCC \ VDD \ OUT1\ OUT2 of the hall chip 8. The VDD and the VSS are respectively communicated with two terminal pins 102 at one end of two wires of the wire line, the SDA and the SCL are respectively communicated with two terminal pins 102 at the other end of two wires of the wire line, and the OUT1 and the OUT2 are respectively communicated with a bridge terminal 103 of each lead.

The closed-loop feedback control principle of the lens driving motor is as follows:

in the running process of the lens driving motor, the motor is powered on in advance to run for a circle on the whole stroke surface, the image processor finds out the image position point with the best image imaging effect, and the relationship between the lens position parameter and the corresponding current output parameter is established.

In the subsequent control process, the hall chip 8 detects the position of the winding carrier 1 of the Z axis relative to the base 5 based on the change of the magnetic field of the hall magnet 9 moving along with the winding carrier 1 in the sensing Z axis direction, so that the position of the lens can be detected, and a digital analog electric signal is output, the hall chip 8 performs operation processing on the digital analog electric signal, and applies a current with a corresponding magnitude to the driving coil 2 through the established position parameter and corresponding current output parameter relation to drive the winding carrier 1 to accurately and quickly operate to the position point with the optimal image imaging effect, so that the current position of the winding carrier 1 is subjected to feedback control (namely closed-loop control) based on the detection result of the hall sensor on the hall chip 8.

Referring to fig. 11, 12, 14 and 15, the circuit paths of the lens module driving of the lens driving motor are: OUT1 on Hall chip 8-pad 104b of one lead inside base 5-bonding position on connecting portion 41d of lower spring 4-initial line hanging post 12-initial line coil-final line hanging post 13-bonding position on the other connecting portion 41c of lower spring 4-pad 104a of another lead inside base 5-OUT 2 on Hall chip 8.

The lens driving motor provided by the invention can be used for an image pickup device of equipment such as a mobile phone and the like and the mobile phone, and can also be used for similar image pickup devices and mobile terminals.

The lens driving motor of the present invention has the following features:

firstly, a closed-loop control function is realized without a PCB (printed Circuit Board) in the structural design, the product structure is further simplified, and the assembly and low-cost control are facilitated;

secondly, the lens driving motor adopts a closed loop feedback mechanism, has short stroke and a lens position feedback system, can realize quick and accurate focusing and can accurately control the position of a lens module;

thirdly, the yield and the quality of the product are improved, and the loss is reduced;

fourthly, the lens driving motor of the invention has a low-cost closed-loop control function, can realize rapid and accurate focusing, and can converge to the control position of the lens module more rapidly, thereby shortening the detection time and improving the photographing experience of users.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention. The invention is limited only by the claims and their full scope and equivalents.