CN111025819B

CN111025819B - Lens driving motor, camera and mobile terminal

Info

Publication number: CN111025819B
Application number: CN201911268865.5A
Authority: CN
Inventors: 龚高峰; 王建华; 凌彩盛
Original assignee: Shanghai BL Electronics Co Ltd
Current assignee: Shanghai BL Electronics Co Ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2025-05-23
Anticipated expiration: 2039-12-11
Also published as: CN111025819A

Abstract

The invention provides a lens driving motor, a camera and a mobile terminal. The lens driving motor comprises a shell, an upper spring, a driving magnet, a driving coil, a lens supporting body and a lower cover assembly, wherein the shell is arranged on the lower cover assembly to form a containing space between the lower cover assembly and the lower cover assembly, the driving magnet, the driving coil and the lens supporting body are all located in the containing space, the driving coil is arranged on the lens supporting body, the driving magnet corresponds to the driving coil, the upper spring is arranged between the shell and the lens supporting body, the upper spring comprises an outer ring structure, the outer ring structure is connected with the shell, the inner ring structure is connected with the lens supporting body, the middle structure is used for connecting the outer ring structure and the inner ring structure through the middle structure, a plurality of protruding parts are arranged on the middle structure, and at least two protruding parts extend along the directions close to each other to form oiling gaps. The invention solves the problem of poor usability of the lens driving motor in the prior art.

Description

Lens driving motor, camera and mobile terminal

Technical Field

The invention relates to the technical field of cameras, in particular to a lens driving motor, a camera and a mobile terminal.

Background

The lens driving motor of the traditional camera module has the main principle that in a permanent magnetic field, the stretching position of a VCM spring piece is controlled by changing the direct current of a coil in the motor to convert the current into mechanical force, so that the lens is driven to move up and down to achieve the function of focusing the lens, the aim of moving the whole lens in a micro distance, changing the focal length and realizing clear images can be achieved.

As a new technology, a closed Loop Motor (Close Loop Motor) which appears in the market in recent years is formed into a closed Loop system with a focusing position feedback function after a hall chip is added, so that focusing speed and focusing accuracy are improved to a certain extent. However, as with other types of motors, the problem of interference from elastic resonance of the spring member connected to the lens support and the housing during operation is unavoidable, and the interference of resonance caused by the elastic element at the internal vibration frequency will cause an obstacle to accurate focus control of the lens driving motor in a short time.

As a material with vibration reduction effect, the damping material has good effect on the resonance inhibition of the spring piece in the X, Y, Z axial direction. It is preferable to add a damping material to a suitable position between the fixed and movable parts of the spring piece where resonance is easily induced. However, too much or too little coating damping can have a negative impact on the subsequent effects. In fact, when damping materials of different types and specifications are used, it is impossible to ensure long-term stagnation to the target position due to the thickness of the material or the like, and there is a risk that the impact vibration or the lapse of time gradually leaks out, or even adheres to components such as a lens support, a magnet, or the like, causing other problems. On the premise of controlling proper coating quantity, the long-term conservation of damping oil is further ensured, and the problems of subsequent damping quantity loss and the like are not caused, so that the optimal damping effect and service life in the later stage are ensured.

Therefore, the conventional art has a problem that the usability of the lens driving motor is poor.

Disclosure of Invention

The invention mainly aims to provide a lens driving motor, a camera and a mobile terminal, so as to solve the problem of poor usability of the lens driving motor in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a lens driving motor including a housing, an upper spring, a driving magnet, a driving coil, a lens supporter, and a lower cover assembly, the housing being disposed on the lower cover assembly to form a receiving space therebetween, the driving magnet, the driving coil, and the lens supporter being disposed in the receiving space, and the driving coil being disposed on the lens supporter, the driving magnet being disposed corresponding to the driving coil, the upper spring being disposed between the housing and the lens supporter, the upper spring including an outer ring structure, the outer ring structure being connected to the housing, the inner ring structure being connected to the lens supporter, and an intermediate structure, the outer ring structure and the inner ring structure being connected through the intermediate structure, and the intermediate structure being provided with a plurality of bosses, and at least two bosses extending in directions approaching each other and forming an oiling slit.

Further, one side of each of the two protruding parts, which is close to each other, is respectively provided with a matching surface which is matched with each other, and an oiling gap is formed between the two matching surfaces.

Further, the two mating surfaces are parallel to each other, or the two mating surfaces are mating tooth surfaces.

Further, the two mating surfaces are mating tooth surfaces, and teeth of the two tooth surfaces are opposite to each other or staggered from each other.

Further, the intermediate structure comprises a plurality of mutually independent connecting sections, the first end of each connecting section is respectively connected with different positions of the outer ring structure, the second end of each connecting section is respectively connected with different positions of the inner ring structure, each connecting section is of a multi-section bending strip-shaped structure, and an oiling gap is formed on at least one connecting section.

Further, the outer ring structure is in a closed loop structure, the position of the outer ring structure corresponding to the corner of the shell is connected with the intermediate structure, or the outer ring structure is in an open loop structure, and the position of the outer ring structure corresponding to the corner of the shell is connected with the intermediate structure.

Further, the outer ring structure is an open-loop structure and is composed of a group of straight-edge structures symmetrically arranged on the outer side of the inner ring structure, the end parts of each straight-edge structure are respectively and correspondingly connected with a connecting section, and the second ends of the two connecting sections connected to the same straight-edge structure are close to each other and connected with the inner ring structure.

Further, the periphery side of the lens support body is provided with two positioning parts, the two positioning parts respectively extend towards a group of side walls which are oppositely arranged of the shell, and the number of the driving coils is two, and the two driving coils are respectively correspondingly wound on the two positioning parts.

Further, a positioning protrusion is arranged on the positioning portion, and the driving coil is limited by the positioning protrusion when being wound on the positioning portion.

Further, the lens driving motor further comprises a Hall magnet, the lens support body is provided with a containing concave part, and only one side of the Hall magnet, which faces the Hall element, is exposed at the opening of the containing concave part.

The lower cover assembly comprises a lower cover, a lower spring, a PCB board and a PCB board, wherein a mounting wall extending towards the lens supporting body is arranged on the circumferential side wall of the lower cover, the lower spring is arranged between the lower cover and the lens supporting body, a clearance gap for extending out of an end pin group of the PCB board is arranged at the position of the mounting wall, which corresponds to the PCB board, of the PCB board, and the lower spring is electrically communicated with the PCB board through the lower cover.

Further, the outer periphery of the lower cover is provided with a lap joint flange, one end of the shell close to the lower cover is lapped on the lap joint flange so that the junction of the shell and the lap joint flange is flush, and/or the mounting wall is provided with at least one positioning column, and the PCB is provided with at least one positioning hole matched with the positioning column.

Further, the lens driving motor further comprises a Hall chip, a capacitor and an inductor, wherein the Hall chip, the capacitor and the inductor are arranged on one side of the PCB, which faces the lens supporting body, and a yielding opening is formed in the mounting wall at the position corresponding to the Hall chip, the capacitor and the inductor.

Further, the terminal pin group comprises four control terminal pins, and the four control terminal pins are electrically communicated with the Hall chip.

Further, the terminal pin group at least comprises a first conductive terminal pin and a second conductive terminal pin, the lower cover is provided with a first connection terminal pin and a second connection terminal pin, the lower spring comprises a first sub-spring and a second sub-spring, the first conductive terminal pin is electrically communicated with the first sub-spring through the first connection terminal pin, the second conductive terminal pin is electrically communicated with the second sub-spring through the second connection terminal pin, the first sub-spring and the second sub-spring are communicated through the driving coil, and the first conductive terminal pin and/or the second conductive terminal pin are provided with soldering tin holes.

Further, a plurality of protruding portions are provided on the lower spring.

According to another aspect of the present invention, there is provided a camera including the above lens driving motor.

According to another aspect of the present invention, there is provided a mobile terminal including the camera described above.

Further, the mobile terminal includes at least one of a mobile phone, a portable information terminal, and a notebook computer.

By applying the technical scheme of the application, the lens driving motor comprises a shell, an upper spring, a driving magnet, a driving coil, a lens supporting body and a lower cover assembly, wherein the shell is arranged on the lower cover assembly to form a containing space between the upper spring and the lower cover assembly, the driving magnet, the driving coil and the lens supporting body are all positioned in the containing space, the driving coil is arranged on the lens supporting body, the driving magnet is arranged corresponding to the driving coil, the upper spring is arranged between the shell and the lens supporting body, and the upper spring comprises an outer ring structure, an inner ring structure and an intermediate structure. The outer ring structure is connected with the shell, the inner ring structure is connected with the lens support body, the outer ring structure and the inner ring structure are connected through the middle structure, a plurality of protruding parts are arranged on the middle structure, and at least two protruding parts extend along the direction of approaching each other and form oiling gaps.

When the lens driving motor with the structure is used, the upper spring consists of the outer ring structure, the inner ring structure and the middle structure, so that damping oil can be added to the upper spring at the oiling gap of the middle structure. Due to the fact that the plurality of protruding portions are arranged, a certain stopping effect can be achieved on the damping oil through the plurality of protruding portions, so that the stay time of the damping oil on the upper spring can be effectively prolonged, the buffering and damping effects of the damping oil on the upper spring are guaranteed, and vibration of the lens supporting body in the moving process can be effectively reduced. Therefore, the usability of the lens driving motor can be effectively improved by such an arrangement.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

fig. 1 shows a schematic configuration of a lens driving motor according to an embodiment of the present invention;

FIG. 2 shows an exploded view of the lens drive motor of FIG. 1;

FIG. 3 is a schematic view showing the structure of an upper spring of a lens driving motor according to an embodiment of the present application;

FIG. 4 shows an enlarged view at A in FIG. 3;

FIG. 5 shows a schematic view of the structure of an upper spring of a lens driving motor according to another embodiment of the present application;

FIG. 6 shows an enlarged view at B in FIG. 5;

FIG. 7 is a schematic view showing the structure of an upper spring of a lens driving motor according to another embodiment of the present application;

FIG. 8 shows an enlarged view at C in FIG. 7;

FIG. 9 shows a schematic diagram of the structure of a lens support of the lens driving motor of FIG. 2;

FIG. 10 is a schematic diagram showing the positional relationship among the PCB board, the Hall chip, the capacitor and the inductor of the lens driving motor according to the present application;

Fig. 11 is a schematic view showing the structure of a PCB board of a lens driving motor in the present application;

Fig. 12 is a schematic diagram showing a circuit connection relationship between a driving coil of a lens driving motor and a lower cover assembly in the present application.

Wherein the above figures include the following reference numerals:

10. The device comprises a shell, 11, a gap, 20, an upper spring, 21, an outer ring structure, 211, a straight edge structure, 22, an inner ring structure, 23, an intermediate structure, 231, a connecting section, 24, a protruding part, 25, an oiling gap, 30, a driving magnet, 40, a driving coil, 50, a lens supporting body, 51, a positioning part, 52, a positioning protrusion, 53, a containing concave part, 60, a lower cover assembly, 61, a lower cover, 611, a mounting wall, 612, a lap joint flange, 613, a positioning column, 614, a yielding opening, 615, a first connecting end pin, 616, a second connecting end pin, 62, a lower spring, 621, a first sub-spring, 622, a second sub-spring, 63, a PCB board, 631, a positioning hole, 64, an end pin group, 641, a control end pin, 642, a first conductive end pin, 643, a second conductive end pin, 644, a soldering tin hole, 70, a magnet, 71, a Hall chip, 72, a capacitor, 73 and an inductor.

Detailed Description

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

It is noted that 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 unless otherwise indicated.

In the present invention, unless otherwise indicated, the use of orientation terms such as "upper, lower, top, bottom" are generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, vertical or gravitational direction, and likewise, for ease of understanding and description, "inner, outer" refer to inner, outer relative to the profile of the component itself, but such orientation terms are not intended to limit the invention.

In order to solve the problem of poor usability of a lens driving motor in the prior art, the application provides the lens driving motor, a camera and a mobile terminal.

Wherein, the mobile terminal in the application, including cameras in the present application. The camera of the present application includes a lens driving motor described below.

Specifically, the mobile terminal includes at least one of a mobile phone, a portable information terminal, and a notebook computer.

The invention adopts corresponding inhibition means aiming at the problem of elastic resonance interference of the spring piece, and further ensures the long-term effective stability of the quantitative damping material, and finally enables the driving motor to achieve ideal focusing speed and focusing precision.

As shown in fig. 1 and 2, the lens driving motor of the present application includes a housing 10, an upper spring 20, a driving magnet 30, a driving coil 40, a lens support 50, and a lower cover assembly 60, the housing 10 is disposed on the lower cover assembly 60 to form a receiving space therebetween, the driving magnet 30, the driving coil 40, and the lens support 50 are all located in the receiving space, and the driving coil 40 is disposed on the lens support 50, the driving magnet 30 is disposed corresponding to the driving coil 40, the upper spring 20 is disposed between the housing 10 and the lens support 50, and the upper spring 20 includes an outer ring structure 21, an inner ring structure 22, and an intermediate structure 23. The outer ring structure 21 is connected with the outer shell 10, the inner ring structure 22 is connected with the lens supporting body 50, the outer ring structure 21 and the inner ring structure 22 are connected through an intermediate structure 23, a plurality of protruding portions 24 are arranged on the intermediate structure 23, and at least two protruding portions 24 extend along the direction of approaching each other and form oiling gaps 25.

When the lens driving motor with the above structure is used, since the upper spring 20 is composed of the outer ring structure 21, the inner ring structure 22 and the intermediate structure 23, the damping oil can be dotted at the oiling slit 25 of the intermediate structure 23 when the damping oil is added to the upper spring 20. Due to the plurality of protruding portions 24, a certain stopping effect can be achieved on the damping oil through the plurality of protruding portions 24, so that the stay time of the damping oil on the upper spring 20 can be effectively prolonged, the buffering and damping effects of the damping oil on the upper spring 20 are guaranteed, and vibration of the lens supporting body 50 in the moving process can be effectively reduced. Therefore, the usability of the lens driving motor can be effectively improved by such an arrangement.

It should be noted that, since the movement of the upper spring 20 is caused during the movement of the lens support body 50, tremble occurs during the movement of the upper spring 20, thereby causing tremble of the lens and further affecting the focusing effect. Therefore, the chattering of the upper spring 20 can be effectively reduced by adding damping oil to the upper spring 20, thereby ensuring focusing. By providing the boss 24 to form the oiling slit 25, the damping oil can be stopped to enhance the use effect of the damping oil.

Specifically, the two protruding portions 24 have mating surfaces that mate with each other on the sides thereof that are close to each other, respectively, and an oiling slit 25 is formed between the two mating surfaces.

In one embodiment of the present application, as shown in fig. 5 and 6, the two mating surfaces are parallel to each other. By this arrangement, the pressing deformation of the two mating surfaces due to the collision with each other can be effectively avoided during the movement of the upper spring 20.

Optionally, the two mating surfaces are mating toothed surfaces. By this arrangement, the residence time of the damping oil on the upper spring 20 can be effectively prolonged, so that the cushioning effect of the damping oil on the upper spring 20 can be further improved and the vibration of the upper spring 20 can be reduced.

In the embodiments shown in fig. 3 and 4 and the embodiments shown in fig. 7 and 8, the mating surfaces are tooth surfaces.

Optionally, the two mating surfaces are mating tooth surfaces, and teeth of the two tooth surfaces are opposite to each other or are staggered from each other. By arranging the teeth of the two tooth surfaces to face each other, it is possible to effectively prevent the escape of damping oil. The teeth of the two tooth surfaces are staggered, so that vibration of the upper spring 20 can be reduced when the upper spring 20 deforms. Accordingly, the specific form of the tooth surface may be selected according to factors such as the intensity of movement of the lens support 50 that is actually used.

Specifically, the intermediate structure 23 includes a plurality of connection segments 231 that are independent of each other, a first end of each connection segment 231 is connected to different positions of the outer ring structure 21, a second end of each connection segment 231 is connected to different positions of the inner ring structure 22, each connection segment 231 is in a multi-segment bent strip structure, and an oiling slit 25 is formed on at least one connection segment 231. In the present application, the plurality of connection segments 231 are identical in structure.

It should be noted that, in the present application, the plurality of connection segments 231 are uniformly distributed with respect to the inner ring structure 22 and the outer ring structure 21, and by this arrangement, it is possible to effectively ensure that the stress between the lens support body 50, the upper spring 20 and the housing 10 is uniform during the movement of the lens support body 50.

Alternatively, the outer ring structure 21 is in a closed loop structure, and the outer ring structure 21 is connected to the intermediate structure 23 at a position corresponding to the corner of the housing 10.

Alternatively, the outer ring structure 21 is an open-loop structure, and the outer ring structure 21 is connected to the intermediate structure 23 at a position corresponding to the corner of the housing 10.

Alternatively, the outer ring structure 21 is an open-loop structure and is formed by a set of straight-edge structures 211 symmetrically arranged outside the inner ring structure 22, and each straight-edge structure 211 is correspondingly connected with one connecting section 231 at its end, and the second ends of the two connecting sections 231 connected to the same straight-edge structure 211 are close to each other and connected to the inner ring structure 22.

It should be noted that, in one embodiment of the present application, the number of the connection segments 231 is four, the four connection segments 231 are respectively connected with the four corners of the outer ring structure 21, and two corresponding protrusions 24 are disposed on each connection segment 231 to form the oiling gap 25.

As shown in fig. 9, the lens support body 50 is provided with two positioning portions 51 on the outer peripheral side thereof, the two positioning portions 51 respectively protrude toward a set of oppositely disposed side walls of the housing 10, and the two driving coils 40 are respectively wound around the two positioning portions 51 correspondingly. Here, the driving coil 40 in the present application is formed by winding a wire on the positioning portion 51 a plurality of times. Therefore, by such arrangement, not only the driving coil 40 can be conveniently manufactured, but also the wound driving coil 40 can be positioned to a certain extent.

As shown in fig. 9, the positioning portion 51 is provided with a positioning protrusion 52, and the driving coil 40 is stopped by the positioning protrusion 52 when being wound around the positioning portion 51. By arranging the positioning protrusions 52, the driving coil 40 can be effectively limited, so that the driving coil 40 can be effectively prevented from falling off the lens support body 50 in the process of moving the lens support body 50, and the stability of the lens driving motor is effectively ensured. And it should be noted that since the driving coil 40 is wound around the positioning portion 51, the positioning protrusion 52 is located inside the driving coil 40 during actual use, thereby being capable of catching the driving coil 40 and preventing the driving coil 40 from falling off.

As shown in fig. 2, the lens driving motor further includes a hall magnet 70, the lens support body 50 is provided with a accommodating recess 53, and only one side of the hall magnet 70 facing the hall element is exposed at an opening of the accommodating recess 53. By such arrangement, the hall magnet 70 can be effectively prevented from falling off the lens support body 50 while ensuring the usability of the hall magnet 70.

In the present application, as shown in fig. 2, the lower cover assembly 60 includes a lower cover 61, a lower spring 62, and a PCB 63. The lower cover 61 is provided with a mounting wall 611 extending towards the lens support body 50 on the circumferential side wall, the lower spring 62 is arranged between the lower cover 61 and the lens support body 50, the PCB 63 is arranged on one side of the mounting wall 611 close to the casing 10, the position of the casing 10 corresponding to the PCB 63 is provided with a clearance gap 11 for extending out of the end pin group 64 of the PCB 63, and the lower spring 62 is electrically communicated with the PCB 63 through the lower cover 61. By providing the clearance gap 11, the lens driving motor can be more easily installed, and the electrical connection of the terminal pin group 64 can be more easily achieved.

Specifically, as shown in fig. 1, the outer periphery of the lower cover 61 has a lap joint flange 612, and an end of the housing 10 near the lower cover 61 is lap-jointed to the lap joint flange 612 so that the junction of the housing 10 and the lap joint flange 612 is flush. By the arrangement, the overall structure of the lens driving motor can be effectively ensured to be more compact.

Specifically, as shown in fig. 2, at least one positioning post 613 is provided on the mounting wall 611, and at least one positioning hole 631 is provided on the pcb 63 to be engaged with the positioning post 613. By this arrangement, the PCB 63 and the lower cover 61 can be kept stable by the cooperation between the positioning posts 613 and the positioning holes 631. And in the process of installing the PCB 63 on the installation wall 611, the installation of the PCB 63 can be positioned by the cooperation of the positioning posts 613 and the positioning holes 631, so that the accurate installation of the PCB 63 can be effectively ensured.

Specifically, as shown in fig. 10, the lens driving motor further includes a hall chip 71, a capacitor 72, and an inductor 73, where the hall chip 71, the capacitor 72, and the inductor 73 are disposed on a side of the PCB 63 facing the lens support 50, and a relief opening 614 is disposed on the mounting wall 611 at a position corresponding to the hall chip 71, the capacitor 72, and the inductor 73. By this arrangement, the accuracy of use of the lens driving motor can be ensured by the interaction among the hall magnet 70, the hall chip 71, the capacitor 72, and the inductor 73.

And, through setting up inductance 73, can play the effect of assisting the inside electric current stability of PCB board 63 to adjust the inside electric current unstability that arouses because of various possible losses of PCB board 63 circuit. The stable current value is more perfectly unified in favor of theoretical operation and actual occurrence conditions, and accurate focusing of the target stay position point in a short time is facilitated.

When a current is applied to the driving coil 40, an electromagnetic force is generated between the driving coil 40 and the driving magnet 30, and according to the franking left-hand rule, the lens support 50 is driven to linearly move in the optical axis direction of the lens by the electromagnetic force, and the lens support 50 finally stays at a position point when the resultant force of the electromagnetic force generated between the driving coil 40 and the driving magnet 30 and the elastic forces of the upper spring 20 and the lower spring 62 reaches a balanced state. By applying a predetermined current to the driving coil 40, the lens support 50 can be controlled to move to the target position, thereby achieving the focusing purpose.

Specifically, as shown in fig. 11, the terminal group 64 includes four control terminals 641, and the four control terminals 641 are in electrical communication with the hall chip 71. The four control pins 641 control the voltage of the VCC access circuit on the hall chip 71, the operating voltage inside the VDD device, i.e., the operating voltage of the chip, the SDA serial data line, and the SCL clock data line, respectively. Thereby correcting the movement of the lens support 50.

Specifically, as shown in fig. 11 and 12, the terminal group 64 includes at least a first conductive terminal 642 and a second conductive terminal 643, the lower cover 61 is provided with a first connection terminal 615 and a second connection terminal 616, the lower spring 62 includes a first sub-spring 621 and a second sub-spring 622, the first conductive terminal 642 is electrically connected to the first sub-spring 621 through the first connection terminal 615, the second conductive terminal 643 is electrically connected to the second sub-spring 622 through the second connection terminal 616, the first sub-spring 621 and the second sub-spring 622 are connected through the driving coil 40, and the first conductive terminal 642 and/or the second conductive terminal 643 have solder holes 644.

It should be noted that, in an embodiment of the present application, the first conductive pin 642 and the second conductive pin 643 each have a solder hole 644. And the electrical connection is achieved by laser welding the first connection terminal 615 and the second connection terminal 616 with solder paste at the midpoint of the solder hole 644, respectively. And by welding, the stability of connection can be effectively ensured.

It should be noted that, in the present application, the first connection pin 615 and the second connection pin 616 are embedded inside the lower cover 61, that is, only two connection ends of the first connection pin 615 and two connection ends of the second connection pin 616 are exposed out of the lower cover 61, and the rest is disposed inside the lower cover 61.

In one embodiment of the present application, the driving coils 40 and the driving magnets 30 are two, and the two driving coils 40 are disposed in parallel on the lens support 50. And, in actual operation, the electrical conduction path of the driving coil 40 is that the first conductive terminal pin 642 (or the second conductive terminal pin 643) -the first connection terminal pin 615 (or the second connection terminal pin 616) -the first sub-spring 621 (or the second sub-spring 622) -one of the driving coils 40-the other driving coil 40-the second sub-spring 622 (or the first sub-spring 621) -the second connection terminal pin 616 (or the first connection terminal pin 615) -the second conductive terminal pin 643 (or the first conductive terminal pin 642.

It should be noted that, in the present application, a plurality of protrusions 24 may be provided on the lower spring 62 to form the oiling slit 25.

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

1. the structure is simple, and the performance is stable;

2. the buffering and damping effects of damping oil on the upper spring are improved;

3. vibration generated when the lens driving motor works is effectively reduced, and the service performance of the lens driving motor is improved.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the 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 exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated 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 the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lens drive motor, characterized in that it comprises: a housing (10), an upper spring (20), a driving magnet (30), a driving coil (40), a lens support body (50) and a lower cover assembly (60), wherein the housing (10) is arranged on the lower cover assembly (60) to form an accommodation space therebetween, the driving magnet (30), the driving coil (40) and the lens support body (50) are all located in the accommodation space, and the driving coil (40) is arranged on the lens support body (50), the driving magnet (30) is arranged corresponding to the driving coil (40), the upper spring (20) is arranged between the housing (10) and the lens support body (50), and the upper spring (20) comprises:

An outer ring structure (21), the outer ring structure (21) being connected to the outer shell (10);

An inner ring structure (22), wherein the inner ring structure (22) is connected to the lens support body (50);

An intermediate structure (23), wherein the outer ring structure (21) and the inner ring structure (22) are connected via the intermediate structure (23), and a plurality of protrusions (24) are provided on the intermediate structure (23), and at least two of the protrusions (24) extend in a direction approaching each other and form an oiling gap (25).

2. The lens driving motor according to claim 1 is characterized in that the two protrusions (24) have mating surfaces that fit together on their respective sides that are close to each other, and the oil-coated gap (25) is formed between the two mating surfaces.

3. The lens driving motor according to claim 2, characterized in that:

The two mating surfaces are parallel to each other; or

The two matching surfaces are matching toothed surfaces.

4 . The lens driving motor according to claim 2 , wherein the two matching surfaces are matching toothed surfaces, and the teeth of the two toothed surfaces are opposite to each other or staggered with each other.

5. The lens drive motor according to claim 1 is characterized in that the intermediate structure (23) includes a plurality of independent connecting segments (231), the first end of each connecting segment (231) is respectively connected to a different position of the outer ring structure (21), the second end of each connecting segment (231) is respectively connected to a different position of the inner ring structure (22), and each connecting segment (231) is a multi-section bent strip structure, and the oil-coated gap (25) is formed on at least one of the connecting segments (231).

6. The lens driving motor according to claim 1, wherein:

The outer ring structure (21) is a closed-loop structure, and the outer ring structure (21) is connected to the intermediate structure (23) at a position corresponding to a corner of the outer shell (10); or

The outer ring structure (21) is an open ring structure, and the outer ring structure (21) is connected to the intermediate structure (23) at a position corresponding to a corner of the outer shell (10).

7. The lens drive motor according to claim 5 is characterized in that the outer ring structure (21) is an open-loop structure and is composed of a group of straight-edge structures (211) symmetrically arranged on the outside of the inner ring structure (22), and the end of each straight-edge structure (211) is respectively connected to a corresponding connecting segment (231), and the second ends of the two connecting segments (231) connected to the same straight-edge structure (211) are close to each other and connected to the inner ring structure (22).

8. The lens drive motor according to claim 1 is characterized in that two positioning parts (51) are provided on the outer peripheral side of the lens support body (50), and the two positioning parts (51) respectively extend toward a group of oppositely arranged side walls of the outer shell (10), and there are two drive coils (40), and the two drive coils (40) are respectively wound on the two positioning parts (51).

9. The lens driving motor according to claim 8, characterized in that a positioning protrusion (52) is provided on the positioning portion (51), and the driving coil (40) is limited and stopped by the positioning protrusion (52) when it is wound on the positioning portion (51).

10. The lens driving motor according to any one of claims 1 to 9 is characterized in that the lens driving motor also includes a Hall magnet (70), and a receiving recess (53) is provided on the lens support body (50), and only one side of the Hall magnet (70) facing the Hall element is exposed at the opening of the receiving recess (53).

11. The lens driving motor according to any one of claims 1 to 9, characterized in that the lower cover assembly (60) comprises:

A lower cover (61), wherein a mounting wall (611) extending toward the lens support body (50) is provided on a circumferential side wall of the lower cover (61);

A lower spring (62), wherein the lower spring (62) is arranged between the lower cover (61) and the lens support body (50);

A PCB board (63), the PCB board (63) being arranged on a side of the mounting wall (611) close to the housing (10), and the housing (10) being provided with a avoiding notch (11) for allowing an end foot group (64) of the PCB board (63) to extend out at a position corresponding to the PCB board (63), and the lower spring (62) being electrically connected to the PCB board (63) through the lower cover (61).

12. The lens driving motor according to claim 11, characterized in that:

The outer periphery of the lower cover (61) has an overlapping flange (612), and one end of the outer shell (10) close to the lower cover (61) overlaps the overlapping flange (612), so that the outer shell (10) and the overlapping flange (612) are flush at the junction; and/or

At least one positioning column (613) is provided on the installation wall (611), and at least one positioning hole (631) cooperating with the positioning column (613) is provided on the PCB board (63).

13. The lens driving motor according to claim 11 is characterized in that the lens driving motor also includes a Hall chip (71), a capacitor (72) and an inductor (73), and the Hall chip (71), the capacitor (72) and the inductor (73) are all arranged on the side of the PCB board (63) facing the lens support body (50), and a clearance opening (614) is arranged on the mounting wall (611) at the position corresponding to the Hall chip (71), the capacitor (72) and the inductor (73).

14. The lens driving motor according to claim 13, characterized in that the end pin group (64) includes four control end pins (641), and the four control end pins (641) are electrically connected to the Hall chip (71).

15. The lens drive motor according to claim 11 is characterized in that the end pin group (64) includes at least a first conductive end pin (642) and a second conductive end pin (643), the lower cover (61) is provided with a first connecting end pin (615) and a second connecting end pin (616), the lower spring (62) includes a first sub-spring (621) and a second sub-spring (622), the first conductive end pin (642) is electrically connected to the first sub-spring (621) through the first connecting end pin (615), the second conductive end pin (643) is electrically connected to the second sub-spring (622) through the second connecting end pin (616), the first sub-spring (621) and the second sub-spring (622) are connected through the drive coil (40), and the first conductive end pin (642) and/or the second conductive end pin (643) have a solder hole (644).

16. The lens driving motor according to claim 11, characterized in that a plurality of the protrusions (24) are provided on the lower spring (62).

17. A camera, comprising the lens driving motor according to any one of claims 1 to 16.

18. A mobile terminal, comprising the camera according to claim 17.

19. The mobile terminal according to claim 18, characterized in that the mobile terminal comprises at least one of a mobile phone, a portable information terminal and a notebook computer.