Lens drive motor, camera and mobile terminal

Abstract

The present invention provides a lens drive motor, a camera and a mobile terminal. The lens drive motor includes: a housing, an upper spring, a drive magnet, a drive coil, a lens support body and a lower cover assembly. The housing is arranged on the lower cover assembly to form an accommodation space between the two. The drive magnet, the drive coil and the lens support body are all located in the accommodation space, and the drive coil is arranged on the lens support body. The drive magnet is arranged corresponding to the drive coil. The upper spring is arranged between the housing and the lens support body. The upper spring includes: an outer ring structure, the outer ring structure is connected to the housing; an inner ring structure, the inner ring structure is connected to the lens support body; an intermediate structure, the outer ring structure and the inner ring structure are connected through the intermediate structure, and a plurality of protrusions are arranged on the intermediate structure, and at least two protrusions extend in a direction close to each other and form an oil-coated gap. The present invention solves the problem of poor performance of the lens drive motor in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of cameras, and in particular to a lens driving motor, a camera and a mobile terminal. Background Art

[0002] The main principle of the lens drive motor of a traditional camera module is to change the DC current of the coil in the motor within a permanent magnetic field, convert the current into mechanical force to control the stretching position of the VCM spring sheet, thereby driving the lens up and down to achieve the function of lens focusing. It can achieve the purpose of moving the entire lens at a micro distance, changing the focal length, and achieving a clear image.

[0003] In recent years, the closed loop motor has emerged in the market as a new technology. After adding the Hall chip, it forms a closed loop system with the function of focusing position feedback, which improves the focusing speed and focusing accuracy to a certain extent. However, like other types of motors, they are inevitably affected by the elastic resonance interference of the spring component connected to the lens support body and the shell during operation. The resonance interference caused by the internal vibration frequency of the elastic element will hinder the precise focusing control of the lens drive motor in a short period of time.

[0004] As a material with vibration reduction effect, damping material has a good effect on suppressing the resonance of the spring sheet in the X, Y, and Z axis directions. It is an ideal choice to add damping material at the appropriate position between the fixed and movable parts of the spring sheet that is prone to resonance. However, too much or too little damping will have a certain negative impact on the subsequent effect. In fact, when using damping materials of different types and specifications, it is impossible to ensure that the material can stay at the target position for a long time due to the thickness of the material. With the impact vibration or the passage of time, it will gradually leak out, and even adhere to components such as lens supports and magnets, causing other problems. That is, under the premise of controlling the appropriate coating amount, it is also necessary to further ensure the long-term retention of the damping oil so as not to cause subsequent damping loss and other problems, so as to ensure the best damping effect and service life in the later stage.

[0005] Therefore, there is a problem in the prior art that the lens driving motor has poor performance. Summary of the invention

[0006] The main purpose of the present invention is to provide a lens driving motor, a camera and a mobile terminal to solve the problem of poor performance of the lens driving motor in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a lens drive motor is provided, including: a shell, an upper spring, a drive magnet, a drive coil, a lens support body and a lower cover assembly, the shell is arranged on the lower cover assembly to form an accommodating space therebetween, the drive magnet, the drive coil and the lens support body are all located in the accommodating space, and the drive coil is arranged on the lens support body, the drive magnet is arranged corresponding to the drive coil, the upper spring is arranged between the shell and the lens support body, the upper spring includes: an outer ring structure, the outer ring structure is connected to the shell; an inner ring structure, the inner ring structure is connected to the lens support body; an intermediate structure, the outer ring structure and the inner ring structure are connected through the intermediate structure, and a plurality of protrusions are arranged on the intermediate structure, and at least two protrusions extend in a direction approaching each other and form an oil-coated gap.

[0008] Furthermore, the two protrusions have mutually matching mating surfaces on the sides close to each other, and an oil-coated gap is formed between the two matching surfaces.

[0009] Further, the two matching surfaces are parallel to each other; or the two matching surfaces are matching toothed surfaces.

[0010] Furthermore, 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.

[0011] Furthermore, the intermediate structure includes a plurality of independent connecting segments, the first end of each connecting segment is respectively connected to a different position of the outer ring structure, the second end of each connecting segment is respectively connected to a different position of the inner ring structure, and each connecting segment is a multi-section bent strip structure, and an oil-coated gap is formed on at least one connecting segment.

[0012] Furthermore, the outer ring structure is a closed-loop structure, and the outer ring structure is connected to the middle structure at a position corresponding to the corner of the shell; or the outer ring structure is an open-loop structure, and the outer ring structure is connected to the middle structure at a position corresponding to the corner of the shell.

[0013] Furthermore, the outer ring structure is an open-loop structure and is composed of a group of straight-edge structures symmetrically arranged on the outside of the inner ring structure. The ends of each straight-edge structure are respectively connected to a corresponding connecting segment, and the second ends of the two connecting segments connected to the same straight-edge structure are close to each other and connected to the inner ring structure.

[0014] Furthermore, two positioning parts are arranged on the outer peripheral side of the lens support body, and the two positioning parts respectively extend toward a group of oppositely arranged side walls of the shell, and there are two driving coils, and the two driving coils are respectively wound on the two positioning parts.

[0015] Furthermore, a positioning protrusion is provided on the positioning portion, and the driving coil is limited and stopped by the positioning protrusion when it is wound on the positioning portion.

[0016] Furthermore, the lens driving motor also includes a Hall magnet, and a receiving recess is provided on the lens support body, and only one side of the Hall magnet facing the Hall element is exposed at the opening of the receiving recess.

[0017] Furthermore, the lower cover assembly includes: a lower cover, a mounting wall extending toward the lens support body is arranged on the circumferential side wall of the lower cover; a lower spring, the lower spring is arranged between the lower cover and the lens support body; a PCB board, the PCB board is arranged on a side of the mounting wall close to the outer shell, and a avoidance notch for the end foot group of the PCB board to extend out is arranged at a position of the outer shell corresponding to the PCB board, and the lower spring is electrically connected to the PCB board through the lower cover.

[0018] Furthermore, the outer periphery of the lower cover has an overlapping flange, and one end of the outer shell close to the lower cover is overlapped on the overlapping flange so that the junction between the outer shell and the overlapping flange is flush; and / or at least one positioning column is provided on the mounting wall, and at least one positioning hole cooperating with the positioning column is provided on the PCB board.

[0019] Furthermore, the lens drive motor also includes a Hall chip, a capacitor and an inductor, and the Hall chip, the capacitor and the inductor are all arranged on the side of the PCB board facing the lens support body, and a clearance opening is arranged on the installation wall at the position corresponding to the Hall chip, the capacitor and the inductor.

[0020] Furthermore, the terminal pin group includes four control terminal pins, and the four control terminal pins are electrically connected to the Hall chip.

[0021] Furthermore, the end pin group includes at least a first conductive end pin and a second conductive end pin, the lower cover is provided with a first connecting end pin and a second connecting end pin, the lower spring includes a first sub-spring and a second sub-spring, the first conductive end pin is electrically connected to the first sub-spring through the first connecting end pin, the second conductive end pin is electrically connected to the second sub-spring through the second connecting end pin, the first sub-spring and the second sub-spring are connected through a driving coil, and the first conductive end pin and / or the second conductive end pin have a solder hole.

[0022] Furthermore, a plurality of protrusions are arranged on the lower spring.

[0023] According to another aspect of the present invention, a camera is provided, comprising the above-mentioned lens driving motor.

[0024] According to another aspect of the present invention, a mobile terminal is provided, comprising the above-mentioned camera.

[0025] Furthermore, the mobile terminal includes at least one of a mobile phone, a portable information terminal and a notebook computer.

[0026] The technical solution of the present invention is applied. The lens driving motor in the present application includes a housing, an upper spring, a driving magnet, a driving coil, a lens support body and a lower cover assembly. The housing is arranged on the lower cover assembly to form a storage space between the two. The driving magnet, the driving coil and the lens support body are all located in the storage space, and the driving coil is arranged on the lens support body. The driving magnet is arranged corresponding to the driving coil. The upper spring is arranged between the housing and the lens support body. The upper spring includes an outer ring structure, an inner ring structure and an intermediate structure. The outer ring structure is connected to the housing; the inner ring structure is connected to the lens support body; the outer ring structure and the inner ring structure are connected through the intermediate structure, and a plurality of protrusions are arranged on the intermediate structure, and at least two protrusions extend in a direction close to each other and form an oiling gap.

[0027] When using the lens drive motor of the above structure, since the upper spring is composed of an outer ring structure, an inner ring structure and an intermediate structure, when adding damping oil to the upper spring, the damping oil can be applied to the oiling gap of the intermediate structure. Since multiple protrusions are provided, the multiple protrusions can play a certain stopping role on the damping oil, thereby effectively extending the residence time of the damping oil on the upper spring, thereby ensuring the buffering and shock absorbing effect of the damping oil on the upper spring, and further effectively reducing the vibration generated by the lens support body during the movement. Therefore, by such a setting, the performance of the lens drive motor can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 A schematic structural diagram of a lens driving motor according to a specific embodiment of the present invention is shown;

[0030] Figure 2 Shows Figure 1 An exploded view of the lens drive motor in FIG.

[0031] Figure 3 A schematic structural diagram of an upper spring of a lens driving motor in a specific embodiment of the present application is shown;

[0032] Figure 4 Shows Figure 3 The enlarged view of point A in the middle;

[0033] Figure 5 A schematic structural diagram of an upper spring of a lens driving motor in another specific embodiment of the present application is shown;

[0034] Figure 6 Shows Figure 5 The enlarged view of point B in the middle;

[0035] Figure 7 A schematic structural diagram of an upper spring of a lens driving motor in another specific embodiment of the present application is shown;

[0036] Figure 8 Shows Figure 7 Enlarged view of point C in the middle;

[0037] Fig. 9 Shows Figure 2 A schematic structural diagram of a lens support body of a lens driving motor;

[0038] Fig.10 A schematic diagram showing the positional relationship of the PCB board, Hall chip, capacitor and inductor of the lens drive motor in the present application is shown;

[0039] Fig.11 A schematic diagram showing the structure of a PCB board of a lens driving motor in the present application is shown;

[0040] Fig.12 A schematic diagram showing the circuit connection relationship between the drive coil of the lens drive motor and the lower cover assembly in the present application is shown.

[0041] The above drawings include the following reference numerals:

[0042] 10. Shell; 11. Avoidance notch; 20. Upper spring; 21. Outer ring structure; 211. Straight edge structure; 22. Inner ring structure; 23. Intermediate structure; 231. Connecting section; 24. Protrusion; 25. Oiling gap; 30. Driving magnet; 40. Driving coil; 50. Lens support; 51. Positioning part; 52. Positioning protrusion; 53. Accommodating recess; 60. Lower cover assembly; 61. Lower cover; 611. Mounting wall; 612. Overlap flange; 613, positioning column; 614, clearance opening; 615, first connecting terminal pin; 616, second connecting terminal pin; 62, lower spring; 621, first sub-spring; 622, second sub-spring; 63, PCB board; 631, positioning hole; 64, terminal pin group; 641, control terminal pin; 642, first conductive terminal pin; 643, second conductive terminal pin; 644, solder hole; 70, Hall magnet; 71, Hall chip; 72, capacitor; 73, inductor. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0045] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0046] In order to solve the problem of poor performance of lens drive motors in the prior art, the present application provides a lens drive motor, a camera and a mobile terminal.

[0047] The mobile terminal in the present application includes the camera in the present application, and the camera in the present application includes the following lens driving motor.

[0048] Specifically, the mobile terminal includes at least one of a mobile phone, a portable information terminal and a notebook computer.

[0049] The present invention adopts corresponding suppression measures for the elastic resonance interference problem of the spring sheet, and further ensures the long-term effective stability of the quantitative damping material, thereby ultimately enabling the drive motor to achieve an ideal focusing speed and focusing accuracy.

[0050] like Figure 1 and Figure 2 As shown, the lens driving motor in the present application includes 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. The housing 10 is arranged on the lower cover assembly 60 to form an accommodation space between the two. 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. 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 to the housing 10; the inner ring structure 22 is connected to the lens support body 50; the outer ring structure 21 and the inner ring structure 22 are connected through the intermediate structure 23, and a plurality of protrusions 24 are arranged on the intermediate structure 23, and at least two protrusions 24 extend in a direction close to each other and form an oiling gap 25.

[0051] When using the lens drive motor of the above structure, since the upper spring 20 is composed of the outer ring structure 21, the inner ring structure 22 and the middle structure 23, when adding damping oil to the upper spring 20, the damping oil can be applied to the oiling gap 25 of the middle structure 23. Since a plurality of protrusions 24 are provided, the damping oil can be stopped by the plurality of protrusions 24 to effectively extend the residence time of the damping oil in the upper spring 20, thereby ensuring the buffering and shock absorbing effect of the damping oil on the upper spring 20, and further effectively reducing the vibration generated by the lens support body 50 during the movement. Therefore, the use performance of the lens drive motor can be effectively improved by such a setting.

[0052] It should be noted that, since the movement of the lens support 50 will cause the upper spring 20 to move, and the upper spring 20 will vibrate during the movement, which will cause the lens to vibrate, thereby affecting the focusing effect. Therefore, adding damping oil to the upper spring 20 can effectively reduce the vibration of the upper spring 20, thereby ensuring the focus. By providing the protrusion 24 to form the oiling gap 25, the damping oil can be stopped to enhance the use effect of the damping oil.

[0053] Specifically, the two protrusions 24 have mating surfaces that fit together on the sides close to each other, and an oiling gap 25 is formed between the two mating surfaces.

[0054] In a specific embodiment of the present application, Figure 5 and Figure 6 As shown, the two mating surfaces are parallel to each other. By arranging in this way, during the movement of the upper spring 20, the extrusion deformation caused by the collision between the two mating surfaces can be effectively avoided.

[0055] Optionally, the two mating surfaces are matched toothed surfaces. By arranging in this way, the residence time of the damping oil on the upper spring 20 can be effectively prolonged, thereby further improving the buffering and shock absorbing effect of the damping oil on the upper spring 20 and reducing the vibration of the upper spring 20.

[0056] It should be noted that in Figure 3 and Figure 4 The embodiment shown and Figure 7 and Figure 8 In the illustrated embodiment, the mating surfaces are all toothed surfaces.

[0057] Optionally, the two mating surfaces are mating toothed surfaces, and the teeth of the two toothed surfaces are opposite to each other or staggered. By arranging the teeth of the two toothed surfaces to be opposite to each other, the damping oil can be effectively prevented from overflowing. Arranging the teeth of the two toothed surfaces to be staggered can reduce the vibration of the upper spring 20 when the upper spring 20 is deformed. Therefore, the specific form of the toothed surface can be selected according to factors such as the movement intensity of the lens support body 50 actually used.

[0058] Specifically, 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 at least one connecting segment 231 is formed with an oiling gap 25. In addition, it should be noted that in the present application, the structures of the plurality of connecting segments 231 are the same.

[0059] It is worth noting that in the present application, multiple connecting segments 231 are evenly distributed relative to the inner ring structure 22 and the outer ring structure 21. Through such an arrangement, it can be effectively ensured that the force between the lens support body 50, the upper spring 20 and the outer shell 10 is uniform during the movement of the lens support body 50.

[0060] Optionally, the outer ring structure 21 is a closed-loop structure, and the outer ring structure 21 is connected to the middle structure 23 at a position corresponding to a corner of the housing 10 .

[0061] Optionally, the outer ring structure 21 is an open ring structure, and the outer ring structure 21 is connected to the middle structure 23 at a position corresponding to a corner of the housing 10 .

[0062] Optionally, 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 each end of the 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.

[0063] It should be noted that, in a specific embodiment of the present application, there are four connecting segments 231 , which are respectively connected to the four corners of the outer ring structure 21 , and each connecting segment 231 is provided with two corresponding protrusions 24 to form an oiling gap 25 .

[0064] like Fig. 9As shown, two positioning parts 51 are provided on the outer peripheral side of the lens support body 50, and the two positioning parts 51 extend toward a set of oppositely arranged side walls of the housing 10, respectively. There are two drive coils 40, and the two drive coils 40 are respectively wound on the two positioning parts 51. It should be noted here that the drive coil 40 in the present application is formed by winding a wire on the positioning part 51 for multiple times. Therefore, such a setting can not only facilitate the production of the drive coil 40, but also play a certain positioning role for the wound drive coil 40.

[0065] like Fig. 9 As shown, a positioning protrusion 52 is provided on the positioning portion 51, and the driving coil 40 is stopped by the positioning protrusion 52 when it is wound on the positioning portion 51. By providing the positioning protrusion 52, the driving coil 40 can be effectively limited, so that the driving coil 40 can be effectively prevented from falling off from the lens support body 50 during the movement of the lens support body 50, thereby effectively ensuring the stability of the lens driving motor. It should also be pointed out that since the driving coil 40 is wound on the positioning portion 51, the positioning protrusion 52 is located inside the driving coil 40 during actual use, so that the driving coil 40 can be clamped and prevented from falling off.

[0066] like Figure 2 As shown, the lens driving motor further 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. By such an arrangement, the Hall magnet 70 can be effectively prevented from falling off from the lens support body 50 while ensuring the performance of the Hall magnet 70.

[0067] In this application, if Figure 2 As shown, the lower cover assembly 60 includes a lower cover 61, a lower spring 62 and a PCB board 63. A mounting wall 611 extending toward the lens support body 50 is provided on the circumferential side wall of the lower cover 61; the lower spring 62 is provided between the lower cover 61 and the lens support body 50; the PCB board 63 is provided on a side of the mounting wall 611 close to the housing 10, and a clearance notch 11 for the end pin group 64 of the PCB board 63 to extend is provided at a position of the housing 10 corresponding to the PCB board 63, and the lower spring 62 is electrically connected to the PCB board 63 through the lower cover 61. By providing the clearance notch 11, the installation of the lens drive motor can be made easier, and the electrical connection of the end pin group 64 can be made easier.

[0068] Specifically, Figure 1As shown, the outer periphery of the lower cover 61 has an overlapping flange 612, and one end of the housing 10 close to the lower cover 61 overlaps the overlapping flange 612, so that the junction of the housing 10 and the overlapping flange 612 is flush. By this arrangement, the overall structure of the lens driving motor can be effectively ensured to be more compact.

[0069] Specifically, Figure 2 As shown, 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 board 63 to cooperate with the positioning post 613. Through such a configuration, the PCB board 63 and the lower cover 61 can be kept stable through the cooperation between the positioning post 613 and the positioning hole 631. In addition, during the process of installing the PCB board 63 to the mounting wall 611, the installation of the PCB board 63 can be positioned through the cooperation between the positioning post 613 and the positioning hole 631, thereby effectively ensuring that the PCB board 63 can be accurately installed.

[0070] Specifically, Fig.10 As shown, the lens drive 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. Through such an arrangement, the use accuracy of the lens drive motor can be ensured through the interaction between the Hall magnet 70, the Hall chip 71, the capacitor 72 and the inductor 73.

[0071] Furthermore, by providing the inductor 73, the current stability inside the PCB board 63 can be assisted to adjust the current instability caused by various possible losses inside the circuit of the PCB board 63. The stable current value state is conducive to a more perfect unification of theoretical calculation and actual conditions, and is conducive to achieving accurate focusing on the target stop position in a short time.

[0072] When current is passed through the driving coil 40, an electromagnetic force is generated between the driving coil 40 and the driving magnet 30. According to Fleming's left-hand rule, the electromagnetic force drives the lens support 50 to move linearly along the optical axis of the lens. The lens support 50 finally stays at a position where the combined force of the electromagnetic force generated between the driving coil 40 and the driving magnet 30 and the elastic force of the upper spring 20 and the lower spring 62 reaches a state of equilibrium. By passing a predetermined current through the driving coil 40, the lens support 50 can be controlled to move to the target position, thereby achieving the purpose of focusing.

[0073] Specifically, Fig.11As shown, the terminal pin group 64 includes four control terminal pins 641, and the four control terminal pins 641 are electrically connected to the Hall chip 71. The four control terminal pins 641 respectively control the voltage of the VCC access circuit on the Hall chip 71, the working voltage inside the VDD device, that is, the working voltage of the chip, the SDA serial data line, and the SCL clock data line, so as to correct the movement of the lens support body 50.

[0074] Specifically, Fig.11 and Fig.12 As shown, 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 driving coil 40, and the first conductive end pin 642 and / or the second conductive end pin 643 have a solder hole 644.

[0075] It should be noted that, in a specific embodiment of the present application, both the first conductive end pin 642 and the second conductive end pin 643 have a solder hole 644. Solder paste is applied to the solder hole 644 to perform laser welding with the first connection end pin 615 and the second connection end pin 616, respectively, so as to achieve electrical connection. And by performing welding, the stability of the connection can be effectively guaranteed.

[0076] It should also be noted that in the present application, the first connection end pin 615 and the second connection end pin 616 are embedded in the lower cover 61, that is, only the two connection ends of the first connection end pin 615 and the two connection ends of the second connection end pin 616 are exposed from the lower cover 61, and the rest are arranged inside the lower cover 61.

[0077] In a specific embodiment of the present application, there are two driving coils 40 and two driving magnets 30, and the two driving coils 40 are arranged in parallel on the lens support 50. In addition, in the actual working process, the electrical conduction path of the driving coil 40 is: the first conductive end pin 642 (or the second conductive end pin 643) - the first connecting end pin 615 (or the second connecting end 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 connecting end pin 616 (or the first connecting end pin 615) - the second conductive end pin 643 (or the first conductive end pin 642).

[0078] It should be noted that in the present application, a plurality of protrusions 24 may also be provided on the lower spring 62 to form an oiling gap 25 .

[0079] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0080] 1. Simple structure and stable performance;

[0081] 2. Improved the buffering and shock absorbing effect of the damping oil on the upper spring;

[0082] 3. Effectively reduce the vibration generated by the lens drive motor when it is working, and improve the performance of the lens drive motor.

[0083] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0084] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0085] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lens drive motor, It is characterized in that include: 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 a storage space between the two, the driving magnet (30), the driving coil (40) and the lens support body (50) are all located in the storage 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, It is characterized in that The two protrusions (24) have mutually matching surfaces on their respective sides that are close to each other, and the oiling gap (25) is formed between the two matching surfaces.

3. The lens driving motor according to claim 2, It is 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, It is characterized in that 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 driving motor according to claim 1, It is characterized in that The intermediate structure (23) comprises a plurality of mutually independent connecting segments (231), wherein the first end of each connecting segment (231) is respectively connected to a different position of the outer ring structure (21), and 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 in the form of a multi-section bent strip structure, and the oiling gap (25) is formed on at least one of the connecting segments (231).

6. The lens driving motor according to claim 1, It is characterized in that 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 driving motor according to claim 5, It 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 outside the inner ring structure (22), each end of the straight-edge structure (211) is 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 driving motor according to claim 1, It is characterized in that Two positioning parts (51) are arranged 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 housing (10), and there are two driving coils (40), and the two driving coils (40) are respectively and correspondingly wound on the two positioning parts (51).

9. The lens driving motor according to claim 8, It is characterized in that The positioning portion (51) is provided with a positioning protrusion (52), 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, It is characterized in that The lens driving motor further comprises 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, It is 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, It is 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, It is characterized in that The lens driving motor further comprises 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 a 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 positions corresponding to the Hall chip (71), the capacitor (72) and the inductor (73).

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

15. The lens driving motor according to claim 11, It is characterized in that The end pin group (64) at least includes 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) via the first connecting end pin (615); the second conductive end pin (643) is electrically connected to the second sub-spring (622) via the second connecting end pin (616); the first sub-spring (621) and the second sub-spring (622) are connected via the driving coil (40); 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, It is characterized in that A plurality of protrusions (24) are provided on the lower spring (62).

17. A camera, It is characterized in that A lens driving motor comprising the lens driving motor as claimed in any one of claims 1 to 16.

18. A mobile terminal, It is characterized in that Comprising the camera of claim 17.

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

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