Motor drive device and camera module

Abstract

The application discloses a motor driving device and a camera module. The motor driving device comprises a base, an outer frame movably supported on the base in a direction orthogonal to an optical axis and having a first side wall and a second side wall parallel to each other, at least one supporting element arranged on the upper side of the base and movably supporting the outer frame, an inner frame arranged on the inner side of the outer frame and movable in the direction of the optical axis, an optical lens adapted to be arranged on the inner side of the inner frame, a focusing driving mechanism for driving the inner frame to move in the direction of the optical axis, an optical anti-shake driving mechanism for driving the outer frame to move in the direction orthogonal to the optical axis, and at least one pair of side elastic pieces connected between the base and the outer frame and arranged on the first side wall and the second side wall respectively, the side elastic pieces being adapted to be elastically deformed to adapt to the relative displacement between the outer frame and the base.

Description

Technical Field

[0001] This application relates to the field of camera module technology, and in particular to a motor drive device and a camera module. Background Technology

[0002] With the increasing demand for photography in mobile phones and other terminal devices, there is a growing need for camera modules to have better shooting performance. Moreover, due to the size limitations of mobile terminal devices, it is necessary to increase the functionality of camera modules, improve their shooting performance, and at the same time, minimize the size of the camera modules as much as possible.

[0003] There are various ways to improve the shooting performance of camera modules. Currently, the most common functions are autofocus and optical image stabilization (OIS). The mechanisms used to achieve autofocus and OIS are often voice coil motors, i.e., magnet / coil structures. However, placing multiple pairs of magnets and coils within the camera module increases the complexity of its internal structure, hindering miniaturization. Optimizing the autofocus and OIS drive mechanisms is currently a hot research topic.

[0004] In addition, adding a variable aperture device to the camera module to improve its shooting performance is currently a hot research topic. A variable aperture device can adjust the amount of light entering the lens according to the external environment. In well-lit areas, the entrance aperture can be appropriately narrowed to avoid overexposure; in low-light areas, the entrance aperture can be appropriately enlarged to increase the amount of light entering the lens and prevent blurry images. Currently, the operating mechanism of variable aperture devices often uses a magnet / coil structure, requiring external power. How to power the variable aperture device is a problem that urgently needs to be solved. Summary of the Invention

[0005] One objective of this application is to provide a motor drive device with a simple circuit design, which facilitates the connection between the motor drive device and external power supply equipment.

[0006] Another objective of this application is to provide a motor drive device suitable for solving the power supply problem of a variable aperture mechanism.

[0007] Another object of this application is to provide a motor drive device for realizing the functions of autofocus, optical image stabilization and variable aperture of an optical lens.

[0008] Another objective of this application is to provide a compact motor drive device, which is beneficial for miniaturizing camera modules.

[0009] Another objective of this application is to provide a motor drive device that improves the connection method between the outer frame and the base to achieve a stable connection between the outer frame and the base.

[0010] Another objective of this application is to provide a camera module with autofocus, optical image stabilization, and variable aperture.

[0011] Another objective of this application is to provide a compact camera module.

[0012] This application provides a motor drive device, including:

[0013] Base;

[0014] The outer frame is movably supported on the base in the direction orthogonal to the optical axis and has a first sidewall and a second sidewall that are parallel to each other.

[0015] At least one support element is disposed on the upper side of the base and movably supports the outer frame;

[0016] An inner frame is disposed inside the outer frame and is movable along the optical axis, and an optical lens is adapted to be disposed inside the inner frame.

[0017] A focusing drive mechanism is used to drive the inner frame to move along the optical axis.

[0018] An optical image stabilization drive mechanism is used to drive the outer frame to move in a direction orthogonal to the optical axis;

[0019] At least one pair of side springs are provided, the side springs connecting the base and the outer frame, and the pair of side springs are respectively disposed on the first side wall and the second side wall. The side springs are adapted to elastically deform to accommodate the relative displacement between the outer frame and the base.

[0020] Furthermore, the motor drive device includes two pairs of side springs, which are symmetrically arranged at both ends of the first sidewall and the second sidewall.

[0021] Furthermore, the motor drive device includes an upper wiring system disposed on the inner frame and a lower wiring system disposed on the base, and the two ends of the side spring are electrically connected to the upper wiring system and the lower wiring system, respectively.

[0022] Furthermore, the side spring includes a first positioning end electrically connected to the lower circuit system, a second positioning end electrically connected to the upper circuit system, and an elastic deformation portion elastically connecting the first positioning end and the second positioning end. The elastic deformation portion includes a first elastic portion providing deformation in a first direction and a second elastic portion providing deformation in a second direction, thereby the side spring is adapted to elastically deform to accommodate the displacement of the outer frame relative to the base in the first direction and the second direction.

[0023] Furthermore, the first elastic portion extends along the optical axis direction, the first elastic portion is parallel to the first sidewall or the second sidewall, the first direction is perpendicular to the first sidewall or the second sidewall, the second elastic portion is connected to the first elastic portion, the second elastic portion has multiple curved portions, and the second direction is parallel to the first sidewall or the second sidewall.

[0024] Furthermore, the curved portion is S-shaped.

[0025] Furthermore, the upper circuit system includes an upper circuit board and at least one connecting spring. The upper circuit board is disposed on the upper end face of the inner frame, and the connecting spring connects the inner frame and the outer frame. One end of the connecting spring is electrically connected to the upper circuit board, and the other end is electrically connected to the side spring.

[0026] Furthermore, the support element is a ball bearing, and under the support of the ball bearing, the base is adapted to move in a plane orthogonal to the optical axis.

[0027] Furthermore, the upper surface of the base has at least one first ball groove, and the bottom surface of the outer frame has a second ball groove opposite to the first ball groove. A ball movement cavity is defined between the first ball groove and the second ball groove, and the ball is disposed in the ball movement cavity so that the outer frame is adapted to move relative to the base along the direction of the first ball groove or the second ball groove.

[0028] Furthermore, the extending directions of the first ball groove and the second ball groove are perpendicular to each other.

[0029] Furthermore, both side walls of the first ball groove along the extending direction are in contact with the ball, and both side walls of the second ball groove along the extending direction are in contact with the ball.

[0030] Furthermore, each of the four corners of the upper surface of the base has a base support portion, the base support portion protrudes towards the outer frame, and the upper surface of the base support portion forms the first ball groove.

[0031] Furthermore, the motor drive device includes:

[0032] At least one common magnet pair is disposed on the outer frame;

[0033] A focusing drive coil is disposed on the outer side of the inner frame sidewall, the focusing drive coil is opposite to the common magnet pair, and the interaction between the focusing drive coil and the common magnet pair is adapted to drive the inner frame to move along the optical axis.

[0034] An optical image stabilization drive coil is disposed below the outer frame, the optical image stabilization drive coil is opposite to the common magnet pair, and the interaction between the optical image stabilization drive coil and the common magnet pair is adapted to drive the outer frame to move in a direction orthogonal to the optical axis.

[0035] Furthermore, the motor drive device includes two common magnet pairs, which are respectively disposed on a pair of parallel sidewalls of the outer frame.

[0036] Furthermore, the motor drive device also includes at least one optical image stabilization drive magnet pair, which is disposed on the side wall of the outer frame where the common magnet pair is not disposed. The optical image stabilization drive magnet pair is opposite to the optical image stabilization drive coil, and the interaction between the optical image stabilization drive magnet pair and the optical image stabilization drive coil is adapted to drive the outer frame to move in a direction orthogonal to the optical axis.

[0037] Furthermore, the motor drive device includes two pairs of optical image stabilization drive magnets, which are respectively disposed on a pair of opposing sidewalls of the outer frame where the shared magnet pair is not disposed.

[0038] Furthermore, the motor drive device includes a plurality of optical image stabilization drive coils, each optical image stabilization drive magnet pair and each common magnet pair being opposite to an optical image stabilization drive coil.

[0039] Furthermore, the thickness of the optical image stabilization driving magnet pair in the optical axis direction is less than that of the common magnet pair, the top surface of the optical image stabilization driving magnet pair is lower than the top surface of the common magnet pair, and a first magnetic yoke for enhancing magnetic force circulation is provided above the optical image stabilization driving magnet pair.

[0040] Furthermore, a second magnetic yoke is provided below the optical image stabilization driving magnet pair, and the second magnetic yoke is opposite to the first magnetic yoke.

[0041] Furthermore, the first magnetic yoke and the second magnetic yoke are metal sheets, with the first magnetic yoke embedded in the outer frame and the second magnetic yoke disposed in the base.

[0042] Furthermore, the supporting element is a ball bearing, the upper surface of the base has at least one first ball bearing groove, the bottom surface of the outer frame has a second ball bearing groove opposite to the first ball bearing groove, and a ball bearing movable cavity is defined between the first ball bearing groove and the second ball bearing groove; the end of the first magnetic yoke extends into the second ball bearing groove of the outer frame and forms the bottom surface of the second ball bearing groove; the end of the second magnetic yoke extends into the first ball bearing groove of the base and forms the bottom surface of the first ball bearing groove.

[0043] This application also provides a camera module, including an optical lens, a photosensitive component, and the aforementioned motor drive device. The motor drive device is arranged around the optical lens, and the photosensitive component is arranged below the motor drive device for receiving the light converged by the optical lens and performing photoelectric conversion.

[0044] The beneficial effects of this application will be described in detail in the specific implementation methods. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of one embodiment of the motor drive device of this application;

[0046] Figure 2 This is an exploded view of one embodiment of the motor drive device of this application;

[0047] Figure 3 This is an exploded view of one embodiment of the motor drive device of this application;

[0048] Figure 4 This is an exploded view of one embodiment of the motor drive device of this application;

[0049] Figure 5 This is a cross-sectional view of the inner and outer frames of the motor drive device of this application.

[0050] Figure 6 This is a cross-sectional view of the outer frame and base of the motor drive device of this application;

[0051] Figure 7 This is a partial top view of an embodiment of the motor drive device of this application, showing a base, an upper circuit board disposed on the base, and a coil;

[0052] Figure 8 This is a partial bottom view of an embodiment of the motor drive device of this application, showing the outer frame and magnets disposed on the outer frame;

[0053] Figure 9 This is a partial top view of an embodiment of the motor drive device of this application, showing the outer frame mounted on the base;

[0054] Figure 10 This is a schematic diagram of an embodiment of the upper wiring system of the motor drive device of this application;

[0055] Figure 11 This is a schematic diagram of one embodiment of the upper wiring system, side spring, and lower wiring system of the motor drive device of this application;

[0056] Figure 12 This is a schematic diagram showing the wiring connection between the variable aperture mechanism and the upper circuit system in this application;

[0057] Figure 13 An exploded view of one embodiment of the variable aperture mechanism of this application;

[0058] Figure 14 An exploded view of one embodiment of the variable aperture device of this application;

[0059] Figure 15 An exploded view of one embodiment of the variable aperture device of this application;

[0060] In the diagram: 1. Base; 11. Base light-transmitting hole; 12. Base support; 121. First ball groove; 122. Ball; 13. Pin mounting position; 151. Chip receiving hole; 152. Capacitor receiving hole; 2. Outer frame; 21. Second ball groove; 22. Outer frame light-transmitting hole; 23. Support position; 25. Outer frame receiving hole; 3. Inner frame; 31. Inner frame light-transmitting hole; 33. Extension; 34. Inner frame receiving hole; 35. Coil circuit interface; 4. Upper circuit system; 41. Upper circuit board; 411. 412. First upper wiring section; 413. Second upper wiring section; 414. Third upper wiring section; 415. Fourth upper wiring section; 42. Focusing drive chip; 43. Connecting spring; 431. First mounting end; 432. Second mounting end; 433. Flexible connection part; 44. Position sensor; 401. Second external interface; 4011. SCL external wiring terminal; 4012. SDA external wiring terminal; 4013. VSS external wiring terminal; 4014. VDD external wiring terminal; 402. Focusing drive interface; 5. Lower circuit System; 51. Lower circuit board; 52. Optical image stabilization driver chip; 54. Capacitor; 501. First external interface; 5011. First pin; 5012. Second pin; 502. Optical image stabilization driver interface; 6. Side spring; 61. First positioning end; 62. Second positioning end; 63. Elastic deformation part; 631. First elastic part; 632. Second elastic part; 7. Optical image stabilization drive mechanism; 71. Optical image stabilization drive coil; 711. First coil; 712. Second coil; 72. Shared magnet pair; 7 3. Optical image stabilization drive magnet pair; 74. First magnetic yoke; 8. Focusing drive mechanism; 81. Focusing drive coil; 9. Housing; 90. Housing light passage hole; 10. Variable aperture mechanism; 101. Mounting housing; 100. Aperture light passage hole; 102. Blade; 103. Aperture circuit board; 1031. Aperture circuit interface; 104. Aperture drive mechanism; 1041. Drive component; 1042. Drive magnet; 1043. Drive coil; 105. Aperture drive chip; 106. Locking plate; 108. Elastic element. Detailed Implementation

[0061] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0062] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0063] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0064] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0065] In this application, a vertical coordinate system (x, y, z) is used for explanation. The z-axis direction is the optical axis direction, and the optical axis orthogonal direction refers to the direction perpendicular to the optical axis. In this application, the optical axis orthogonal direction can be any direction in the xy plane, such as the x-axis direction or the y-axis direction.

[0066] like Figure 1-12 The motor drive device shown includes a base 1, an outer frame 2, an inner frame 3, an upper circuit system 4, a lower circuit system 5, a side spring 6, an optical image stabilization drive mechanism 7, a focus drive mechanism 8, a housing 9, and a variable aperture mechanism 10.

[0067] The motor drive unit has a light-passing aperture for mounting an optical lens (not shown in the figure). The optical image stabilization drive mechanism 7 drives the optical lens to move along the orthogonal direction of the optical axis to achieve optical image stabilization. The focusing drive mechanism 8 drives the optical lens to move along the optical axis to achieve autofocus. The variable aperture mechanism 10 can adjust the amount of light entering the optical lens according to the ambient light conditions during shooting, thereby obtaining better imaging results in different shooting environments. Those skilled in the art will understand that the components of the motor drive unit are designed to avoid the light-passing aperture or have corresponding through holes, so that the light-passing aperture for mounting the optical lens passes through the motor drive unit.

[0068] like Figure 3 , 4 As shown, the base 1 has a base light-transmitting hole 11, the outer frame 2 is movably supported on the base 1 in the direction orthogonal to the optical axis, the outer frame 2 has an outer frame light-transmitting hole 22 opposite to the base light-transmitting hole 11, the inner frame 3 is movably disposed in the outer frame light-transmitting hole 22 along the optical axis, the inner frame 3 has an inner frame light-transmitting hole 31 opposite to the base light-transmitting hole 11, and the optical lens is adapted to be installed in the inner frame light-transmitting hole 31.

[0069] The focusing drive mechanism 8 is used to drive the inner frame 3 to move along the optical axis. In one embodiment, the focusing drive coil 81 of the focusing drive mechanism 8 is disposed on the outer side of the side wall of the inner frame 3, and a magnet opposite to the focusing drive coil 81 is disposed on the outer frame 2. The interaction between the magnet and the coil drives the inner frame 3 to move relative to the outer frame 2 along the optical axis.

[0070] The optical image stabilization drive mechanism 7 is used to drive the outer frame 2 to move in a direction orthogonal to the optical axis. In one embodiment, the optical image stabilization drive coil 71 of the optical image stabilization drive mechanism 7 is disposed on the base 1, and the outer frame 2 is provided with a magnet opposite to the optical image stabilization drive mechanism coil 71. The interaction between the magnet and the coil drives the outer frame 2 to move relative to the base 1 in a direction orthogonal to the optical axis.

[0071] In some embodiments, at least one common magnet pair 72 is provided on the side wall of the outer frame 2. The common magnet pair 72 is opposite to the focusing drive coil 81 in the orthogonal direction of the optical axis, and is opposite to the first coil 711 of the optical image stabilization drive mechanism 7 in the optical axis direction. The arrangement of the common magnets helps to simplify the structure of the motor drive device and realize the miniaturization of the motor drive device.

[0072] In some embodiments, an optical image stabilization drive magnet pair 73 is further provided on the outer frame 2, and the optical image stabilization drive magnet pair 73 and the common magnet pair 72 are provided on different side walls of the outer frame 2. The optical image stabilization drive magnet pair 73 is opposite to the second coil 712 of the optical image stabilization drive mechanism 7 in the optical axis direction.

[0073] The interaction between the shared magnet pair 72 and the first coil 711 of the optical image stabilization drive mechanism 7 drives the outer frame 2 to move in a first direction, and the interaction between the optical image stabilization drive magnet pair 73 and the second coil 712 of the optical image stabilization drive mechanism 7 drives the outer frame 2 to move in a second direction.

[0074] In one specific embodiment, such as Figure 8 As shown, the outer frame 2 has two pairs of parallel sidewalls. A common magnet pair 72 is disposed on each of one pair of parallel sidewalls, and an optical image stabilization drive magnet pair 73 is disposed on each of the other pair of parallel sidewalls. Figure 7 As shown, the optical image stabilization drive mechanism 7 includes two first coils 711 and two second coils 712. The two first coils 711 are respectively disposed on opposite sides of the base 1, and the two second coils 712 are respectively disposed on the other two sides of the base 1. Thus, the two first coils 711 are respectively opposite to a common magnet pair 72, and the two second coils 712 are respectively opposite to an optical image stabilization drive magnet pair 73. The focusing drive mechanism 8 has two focusing drive coils 81, which are disposed on opposite side walls of the inner frame 3, such that the two focusing drive coils 81 are respectively opposite to two common magnet pairs 72.

[0075] By increasing the number of the first coil 711 and the second coil 712, the driving force of the optical image stabilization drive mechanism 7 on the outer frame 2 can be increased, which also helps to improve the accuracy of shake correction.

[0076] In some embodiments, such as Figure 5 As shown, the top surface of the optical image stabilization driving magnet pair 73 is lower than the top surface of the common magnet pair 72. A first magnetic yoke 74 is provided above the optical image stabilization driving magnet pair 73. The first magnetic yoke 74 is used to enhance the magnetic force circulation of the optical image stabilization driving magnet pair 73, and at the same time, it can reduce the magnetic interference generated by the common magnet pair 72.

[0077] In some embodiments, such as Figure 6 As shown, the first magnetic yoke 74 is a metal sheet, and the first magnetic yoke 74 is embedded in the outer frame 2. Embedding the first magnetic yoke 74 in the outer frame 2 helps to improve the strength of the outer frame 2.

[0078] Furthermore, a second magnetic yoke (not shown in the figure) is provided below the optical image stabilization drive magnet pair 73, and the second magnetic yoke is disposed opposite to the first magnetic yoke 74 on the base 1. In some embodiments, the second magnetic yoke 75 is a metal sheet embedded in the base 1. The presence of magnetic yokes on both the upper and lower sides of the optical image stabilization drive magnet pair 73 helps to maintain the force stability of the optical image stabilization drive magnet pair 73.

[0079] like Figure 3As shown, the upper wiring system 4 is located at the upper part of the motor drive device, and the lower wiring system 5 is located at the lower part of the motor drive device. The upper wiring system 4 and the lower wiring system 5 are connected. Preferably, the upper wiring system 4 and the lower wiring system 5 are connected by a side spring 6 located on the side of the motor drive device.

[0080] The upper circuit system 4 is connected to the focus drive mechanism 8 and the variable aperture mechanism 10, and the lower circuit system 5 is connected to the optical image stabilization drive mechanism 7. The lower circuit system 5 is also suitable for being connected to an external power supply device, so that the external electrical signal is conducted to the upper circuit system 4 through the lower circuit system 5, and then to the focus drive mechanism 8 and the variable aperture mechanism 10 through the upper circuit system 4 respectively.

[0081] This application utilizes the upper wiring system 4 and the lower wiring system 5 to connect the focusing drive mechanism 8 and the variable aperture mechanism 10 to the external power supply equipment, which helps to reduce exposed wiring and saves more space.

[0082] like Figure 10 As shown, the upper circuit system 4 includes an upper circuit board 41, a focus drive chip 42, and a connecting spring 43.

[0083] The upper circuit board 41 has a second external interface 401 and a focus drive interface 402. The variable aperture mechanism 10 is connected to the upper circuit board 41 through the second external interface 401, and the focus drive mechanism 8 is connected to the upper circuit board 41 through the focus drive interface 402.

[0084] Furthermore, the upper circuit board 41 has at least one upper connection part, which is connected to the lower circuit system 5 on one hand and to the second external interface 401 on the other hand, so that the electrical signal can be transmitted from the lower circuit system 5 to the second external interface 401 through the relay of the upper circuit board 41.

[0085] In some embodiments, the upper circuit board 41 has a plurality of upper wiring portions, the second external interface 401 includes a plurality of external wiring terminals, each external wiring terminal is connected to each upper wiring portion in a corresponding manner, and the variable aperture mechanism 10 is electrically connected to each external wiring terminal.

[0086] In one specific embodiment, the second external interface 401 includes an SCL external terminal 4011, an SDA external terminal 4012, a VSS external terminal 4013, and a VDD external terminal 4014. The upper circuit board 41 has a first upper terminal 411, a second upper terminal 412, a third upper terminal 413, and a fourth upper terminal 414. The first upper terminal 411 is connected to the SCL external terminal 4011, the second upper terminal 412 is connected to the SDA external terminal 4012, the third upper terminal 413 is connected to the VSS external terminal 4013, and the fourth upper terminal 414 is connected to the VDD external terminal 4014.

[0087] A portion of the interface of the focus drive chip 42 is connected to each of the upper wiring terminals of the upper circuit board 41, so that different electrical signals from the lower circuit system 5 are input to the focus drive chip 42 through each of the upper wiring terminals. Another portion of the interface of the focus drive chip 42 is connected to the focus drive interface 402 of the upper circuit board 41, so that the electrical signals of the focus drive chip 42 are output to the focus drive mechanism 8 through the focus drive interface 402.

[0088] In one embodiment, the coil of the focus drive mechanism 8 is electrically connected to the focus drive interface 402, that is, the coil of the focus drive mechanism 8 is connected to the focus drive chip 42 through the upper circuit board 41.

[0089] In one specific embodiment, the focus drive chip 42 has an Out1 terminal 421, an Out2 terminal 422, an SCL terminal 423, an SDA terminal 424, a VSS terminal 425, and a VDD terminal 426. The SCL terminal 423 is connected to the first upper wiring portion 411, the SDA terminal 424 is connected to the second upper wiring portion 412, the VSS terminal 425 is connected to the third upper wiring portion 413, and the VDD terminal 426 is connected to the fourth upper wiring portion 414. The focus drive interface 402 has a first focus drive wiring terminal 4021 and a second focus drive wiring terminal 4022 that are respectively connected to the Out1 terminal 421 and the Out2 terminal 422. The positive and negative poles of the coil of the focus drive mechanism 8 are respectively connected to the first focus drive wiring terminal 4021 and the second focus drive wiring terminal 4022.

[0090] The upper circuit board 41 is disposed on the upper end face of the inner frame 3. A connecting spring 43 connects the inner frame 3 and the outer frame 2, and the connecting spring 43 connects the upper wiring portion on the upper circuit board 41 to the side spring 6. The connecting spring 43 enables an elastic connection between the inner frame 3 and the outer frame 2. When the inner frame 3 is displaced relative to the outer frame 2, the connecting spring 43 ensures that the inner frame 3 returns to its initial position, that is, the connecting spring 43 keeps the inner frame 3 and the outer frame 2 in a relatively stable state. In addition, the connecting spring 43 also enables the electrical signal to be connected between the upper circuit board 41 and the side spring 6, so that the electrical signal of the lower circuit system 5 reaches the upper circuit board 41 through the side spring 6 and the connecting spring 43.

[0091] In a preferred embodiment, the number of connecting springs 43 is the same as the number of side springs 6, and each connecting spring 43 is electrically connected to a side spring 6. The number of connecting springs 43 is also the same as the number of upper wiring portions of the upper circuit board 41, and each connecting spring 43 is electrically connected to an upper wiring portion.

[0092] The lower circuit system 5 includes a lower circuit board 51, at least one optical image stabilization driver chip 52, and a first external interface 501.

[0093] The lower circuit board 51 is mounted on the base 1, and the side spring 6 is electrically connected to the lower circuit board 51.

[0094] The lower circuit board 51 has a lower wiring portion that corresponds one-to-one with the upper wiring portion of the upper circuit board 41. The connecting spring 43 and the side spring 6 electrically connect the upper wiring portion and the lower wiring portion one-to-one.

[0095] like Figure 7 As shown, the lower circuit board 51 has an optical image stabilization drive interface 502, which is electrically connected to the optical image stabilization drive mechanism 7; the optical image stabilization drive chip 52 is connected to the optical image stabilization drive interface 502, so that the optical image stabilization drive mechanism 7 is connected to the optical image stabilization drive chip 52 through the lower circuit board 51.

[0096] In one embodiment, the optical image stabilization drive mechanism 7 includes multiple coils, and the lower circuit board 51 has multiple optical image stabilization drive interfaces 502, each optical image stabilization drive interface 502 connecting the coils of each optical image stabilization drive mechanism 7 to the optical image stabilization drive chip 52.

[0097] In one embodiment, the optical image stabilization drive mechanism 7 includes a plurality of first coils 711 and a plurality of second coils 712, and the lower circuit board 51 includes two optical image stabilization drive chips 52. Each first coil 711 and each second coil 712 is respectively connected to a different optical image stabilization drive chip 52, thereby realizing independent control of the first coils 711 and the second coils 712.

[0098] The first external interface 501 is disposed on the lower circuit board 51 or the base 1, and the external power supply device is adapted to be connected to the lower circuit board 51 through the first external interface 501.

[0099] The first external interface 501 has at least one first pin 5011, which is adapted to be electrically connected to an external power supply device. The first pin 5011 is connected to the lower terminal of the lower circuit board 51 in a one-to-one correspondence, so that the electrical signal of the external power supply device reaches each external terminal of the second external interface 401 through the first pin 5011, the line of the lower circuit board 51, the lower terminal, the side spring 6, the connecting spring 43, the upper terminal, and the line of the upper circuit board 41.

[0100] like Figure 3 As shown, the first external interface 501 also has at least one second pin 5012, which is adapted to be electrically connected to an external power supply device. The second pin 5012 is connected to the optical image stabilization driver chip 52 through the lower circuit board 51.

[0101] In some embodiments, the first external interface 501 is disposed on the base 1, and each of the first pins 5011 and the second pins 5012 is connected to the lower circuit board 51 through a conductor embedded in the base 1. The conductor embedded in the base 1 may be, but is not limited to, a metal wire.

[0102] In one specific embodiment, the first external interface 501 includes four first pins 5011 and four second pins 5012.

[0103] In some embodiments, one side edge of the base 1 has a pin mounting position 13, and each first pin 5011 and second pin 5012 is disposed within the pin mounting position 13. One end of each first pin 5011 and second pin 5012 extends to the outside of the base 1.

[0104] In some embodiments, such as Figure 4 As shown, the base 1 has a chip receiving hole 151 for accommodating the optical image stabilization driver chip 52. The optical image stabilization driver chip 52 is disposed in the chip receiving hole 151, which helps to reduce the overall height of the motor drive device.

[0105] In some embodiments, the lower circuit system 5 further includes a capacitor 54 that works in conjunction with the optical image stabilization driver chip 52. The base 1 has a capacitor receiving hole 152 for accommodating the capacitor 54. The capacitor 54 is disposed in the capacitor receiving hole 152, which helps to reduce the overall height of the motor drive device.

[0106] like Figure 10 , 11 As shown, the connecting spring 43 includes a first mounting end 431 disposed on the upper surface of the inner frame 3, a second mounting end 432 disposed on the upper surface of the outer frame 2, and an elastic connecting portion 433 that elastically connects the first mounting end 431 and the second mounting end 432; the side spring 6 includes a first positioning end 61 disposed on the base 1, a second positioning end 62 disposed on the side of the outer frame 2, and an elastic deformation portion 63 that elastically connects the first positioning end 61 and the second positioning end 62. The first mounting end 431 of the connecting spring 43 is electrically connected to the upper wiring portion of the upper circuit board 41, the second mounting end 432 of the connecting spring 43 is electrically connected to the second positioning end 62 of the side spring 6, and the first positioning end 61 of the side spring 6 is electrically connected to the lower wiring portion of the lower circuit board 51.

[0107] In some embodiments, the motor drive device further includes at least one support element disposed on the upper side of the base 1 and movably supporting the outer frame 2. The outer frame 2 has a first sidewall and a second sidewall that are parallel to each other, and a pair of side springs 6 are disposed along the first sidewall and the second sidewall respectively. The side springs 6 are adapted to elastically deform to accommodate the relative displacement between the outer frame 2 and the base 1.

[0108] In a preferred embodiment, the motor drive device includes two pairs of side springs 6, which are symmetrically arranged at both ends of the first sidewall and the second sidewall.

[0109] Furthermore, such as Figure 11 As shown, the elastic deformation portion 63 of the side spring 6 includes a first elastic portion 631 that provides deformation in a first direction and a second elastic portion 632 that provides deformation in a second direction, so that the side spring 6 is adapted to elastically deform to accommodate the displacement of the outer frame 2 relative to the base 1 in the first and second directions.

[0110] Furthermore, the first elastic portion 631 extends along the optical axis and is parallel to the first or second sidewall of the outer frame 2. Its first direction is perpendicular to the first or second sidewall. The second elastic portion 632 is connected to the first elastic portion 631 and has multiple curved portions in an S-shape. Its second direction is parallel to the first or second sidewall. That is, the first and second directions are perpendicular to each other.

[0111] In a preferred embodiment, such as Figure 3 As shown, the support element is a ball bearing 122. With the support of the ball bearing 122, the base 1 is adapted to move in a plane orthogonal to the optical axis.

[0112] The ball bearing 122 reduces friction. The movable connection between the outer frame 2 and the base 1 via the ball bearing and ball groove structure helps to reduce the height of the motor drive unit, achieving overall structural miniaturization. It is worth noting that the ball bearing 122 can be a single ball or multiple balls.

[0113] Furthermore, the upper surface of the base 1 has at least one first ball groove 121, and the bottom surface of the outer frame 2 has a second ball groove 21 opposite to the first ball groove 121. A ball movement cavity is defined between the first ball groove 121 and the second ball groove 21, and the ball 122 is disposed in the ball movement cavity so that the outer frame 2 is adapted to move relative to the base 1 along the direction of the first ball groove 121 or the second ball groove 21.

[0114] Furthermore, the extension directions of the first ball groove 121 and the second ball groove 21 are perpendicular to each other, thereby limiting the displacement of the outer frame 2 in two mutually perpendicular directions by means of the ball 122 and the ball movable cavity.

[0115] In one specific embodiment, the extending directions of the first ball groove 121 and the second ball groove 21 are the first direction and the second direction, respectively.

[0116] Furthermore, both sides of the first ball groove 121 along the extending direction are in contact with the ball 122, and both sides of the second ball groove 21 along the extending direction are in contact with the ball 122. That is, the first ball groove 121 restricts the ball 122 from rolling along the extending direction of the first ball groove 121, and the second ball groove 21 restricts the ball 122 from rolling along the extending direction of the second ball groove 21.

[0117] In some embodiments, the four corners of the upper surface of the base 1 are respectively provided with a base support portion 12, the base support portion 12 protrudes in the direction of the outer frame 2, the base support portion 12 is integrally formed with the base 1, and the upper surface of the base support portion 12 forms a first ball groove 121.

[0118] In some embodiments, such as Figure 6 As shown, the end of the first magnetic yoke 74, embedded within the outer frame 2, extends into the second ball groove 21, forming the bottom surface of the second ball groove 21. The metal first magnetic yoke 74 has a smaller surface roughness than the plastic outer frame 2, allowing the balls 122 to contact the surface of the first magnetic yoke 74, which helps reduce friction during ball rolling. Placing the metal first magnetic yoke 74 inside the outer frame 2 also increases the strength of the plastic frame and improves the overall structural stability.

[0119] In some embodiments, the end of the second magnetic yoke extends into the first ball groove 121 of the base 1 and forms the bottom surface of the first ball groove 121. This helps to reduce the friction when the ball 122 rolls. Setting the second magnetic yoke made of metal inside the base 1 can also increase the strength of the plastic base and improve the stability of the overall structure.

[0120] In some embodiments, such as Figure 5 As shown, the outer frame 2 extends toward the inner frame 3 to form multiple support positions 23. The inner frame 3 has multiple extensions 33 extending toward each support position 23. The inner frame 3 can be movably supported on the outer frame 2 along the optical axis through the extensions 33.

[0121] The extension 33 of the inner frame 3 has an inner frame receiving hole 34 for accommodating the focus drive chip 42. Accommodating the focus drive chip 42 within the extension 33 of the inner frame 3 helps to reduce the overall height of the motor drive device.

[0122] Furthermore, the abutment position 23 of the outer frame 2 has an outer frame receiving hole 25 opposite to the inner frame receiving hole 34, and a position sensor 44 for position detection is disposed within the outer frame receiving hole 25. Disposing of the position sensor 44 within the abutment position 23 of the outer frame 2 also helps to reduce the overall height of the motor drive device.

[0123] Furthermore, the extension 33 of the inner frame 3 has a coil line interface 35, which is electrically connected to the focus drive interface 402 on the upper circuit board 41. A portion of the coil of the focus drive mechanism 8 is integrally formed with the inner frame 3 through a molding process and is connected to the coil line interface 35. It is worth mentioning that when the focus drive mechanism 8 includes multiple coils, each coil is connected to the coil line interface 35.

[0124] In some embodiments, the support position 23 is located on the side wall of the outer frame 2 where the optical image stabilization drive magnet pair 73 is disposed, and the first magnetic yoke 74 is disposed between the support position 23 and the optical image stabilization drive magnet pair 73. In some embodiments, the first magnetic yoke 74 may be mounted on the bottom surface of the support position 23.

[0125] The housing 9 has a housing light-transmitting hole 90. The housing 9 is mounted on the base 1, thereby holding the outer frame 2, inner frame 3, upper circuit system 4, lower circuit system 5, side spring 6, optical image stabilization drive mechanism 7 and focus drive mechanism 8 in the cavity between the housing 9 and the base 1.

[0126] In some embodiments, the housing 9 has a clearance hole at a position opposite to the second external interface 401 to allow the circuit board of the variable aperture mechanism 10 to extend from above the housing 9 to the second external interface 401.

[0127] In some embodiments, the housing 9 has pin pre-drilled holes near the pin mounting position 13 to allow each pin of the first external interface 501 to extend outside the housing 9 to connect to an external power supply device.

[0128] In one embodiment, such as Figure 12 As shown, the variable aperture mechanism 10 includes an aperture driving mechanism 104, an aperture circuit board 103, and an aperture driving chip 105. The aperture driving chip 105 is connected to the aperture driving mechanism 104 through the aperture circuit board 103. The aperture driving chip 105 is also connected to the second external interface 401 through the aperture circuit board 103.

[0129] Furthermore, the aperture circuit board 103 extends into the second external interface 401 of the upward circuit board 41 to form an aperture circuit interface 1031, and the aperture circuit interface 1031 is electrically connected to the second external interface 401.

[0130] In one specific embodiment, the aperture line interface 1031 includes four aperture line terminals, namely the SCL aperture line terminal, the SDA aperture line terminal, the VSS aperture line terminal, and the VDD aperture line terminal, which are electrically connected to the SCL external terminal 4011, the SDA external terminal 4012, the VSS external terminal 4013, and the VDD external terminal 4014 of the second external interface 401, respectively.

[0131] Furthermore, the aperture circuit board 103 is an FPC circuit board, which is suitable for bending so that the aperture circuit interface 1031 is close to the second external interface 401.

[0132] Furthermore, the SCL and SDA aperture circuit terminals are located on one side of the aperture circuit board 103, while the VSS and VDD aperture circuit terminals are located on the other side of the aperture circuit board 103. That is, the two sets of aperture circuit terminals are located on both sides of the aperture circuit board 103, and extend from both sides of the light-transmitting hole to the upper circuit board 41.

[0133] In this application, the upper circuit system 4 is mainly used to connect the circuits of the variable aperture mechanism 10 and the focusing drive mechanism 8. Both share a single circuit board, which simplifies the circuit design and ensures the miniaturization of the overall structure. Furthermore, the upper circuit system 4 and the lower circuit system 5 are connected via side springs 6, forming a complete circuit. The first external interface 501 on the base 1 is soldered to the external circuitry to provide current to the entire motor drive device during operation.

[0134] In one specific embodiment, such as Figure 13-15 As shown, the variable aperture mechanism 10 includes a mounting housing 101, a plurality of blades 102, an aperture circuit board 103, and an aperture drive mechanism 104. An aperture aperture 100 is formed in the center of the mounting housing 101. The blades 102 are movably mounted on the mounting housing 101 to form an adjustable aperture. The aperture drive mechanism 104 drives the blades 102 to adjust the aperture of the aperture. The aperture circuit board 103 is connected to the aperture drive mechanism 104 and is used to control the operation of the aperture drive mechanism 104.

[0135] The variable aperture mechanism 10 is held above the housing 9, and it can support the optical lens or the housing 9, which is not limited in this application.

[0136] In a preferred embodiment, the aperture driving mechanism 104 is a magnet / coil structure driving mechanism. Specifically, the aperture driving mechanism 104 includes a driving member 1041, a driving magnet 1042, and a driving coil 1043. The driving member 1041 is movably disposed on the mounting housing 101 and configured to drive the blade 102 to rotate to adjust the aperture of the entrance hole when it is moved; the driving magnet 1042 is disposed on the driving member 1041; the driving coil 1043 is disposed opposite to the driving magnet 1042 and is disposed on the mounting housing 101 or on the aperture circuit board 103. The driving coil 1043 is electrically connected to the aperture circuit board 103, so that the driving member 1041 is moved to drive the blade 102 to rotate through the interaction between the driving coil 1043 and the driving magnet 1042.

[0137] During operation, the motor drive device of this application first automatically adjusts the size of the entrance aperture in advance according to the environment of the subject to ensure that the amount of light passing through the optical lens is appropriate. Then, it uses the optical image stabilization drive mechanism 7 and the focusing drive mechanism 8 to perform image stabilization and focusing, and then performs imaging.

[0138] In this application, the aperture circuit board 103 and the aperture drive mechanism 104 of the variable aperture mechanism 10 are both disposed on the mounting housing 101, avoiding the aperture light passage 100. The blade 102, the aperture drive mechanism 104, and the aperture circuit board 103 are arranged sequentially on the mounting housing 101 along the optical axis. This makes full use of the axial space of the mounting housing 101 to arrange the components and avoids the radial dimension of the variable aperture mechanism 10 being too large.

[0139] The mounting housing 101 has receiving holes on its bottom surface opposite to the aperture circuit board 103 for accommodating components on the aperture circuit board 103. This allows protruding components on the aperture circuit board 103 that occupy a large space to be accommodated in the receiving holes of the mounting housing 101, making the aperture circuit board 103 fit tightly against the mounting housing 101. This helps to reduce the axial dimension of the variable aperture mechanism 10 and also protects the components.

[0140] Furthermore, the aperture circuit board 103 and the driving member 1041 are respectively disposed on both sides of the mounting housing 103 along the optical axis. The bottom surface of the mounting housing 103 has a coil through hole for accommodating the driving coil 1043. The driving coil 1043 is disposed on the aperture circuit board 103 and extends from the aperture circuit board 103 into the coil through hole, so that the driving coil 1043 is opposite to the driving magnet 1042 disposed on the bottom surface of the driving member 1041. Furthermore, the driving coil 1043 is disposed near the edge of the aperture circuit board 103, and the side of the coil through hole communicates with the outside. This simplifies the structure of the mounting housing 101 and reduces the overall weight of the mounting housing 101.

[0141] The drive element 1041 is annular and is rotatably mounted on the mounting housing 101. The drive element 1041 has a mounting groove on its bottom surface opposite to the drive coil 1043, and the drive magnet 1043 is embedded in the mounting groove.

[0142] The drive member 1041 has a section of the drive magnet 1042 extending radially outward to form an enlarged end, providing sufficient space to embed the drive magnet 1042. Furthermore, to save internal space, the mounting housing 101 and the enlarged end of the drive member 1041 form a clearance opening, the width of which is greater than the width of the enlarged end. This allows the enlarged end to rotate within the clearance opening when the drive member 1041 rotates. The clearance opening helps reduce the size of the variable aperture mechanism 10, avoids interference between the drive member 1041 and the mounting housing 101 during rotation, and also limits the rotation angle of the drive member 1041.

[0143] There are multiple blades 102. One end of each blade 102 is rotatably connected to the mounting housing 101, and the other end extends above the aperture 100. Thus, the multiple blades 102 are combined to define an adjustable aperture. Each blade 102 is connected to a drive member 1041 so that when the drive member 1041 rotates, it drives each blade 102 to rotate to adjust the aperture of the aperture.

[0144] The blade 102 has a positioning hole, and the mounting housing 101 has a positioning post that mates with the positioning hole. The blade 102 rotates around the positioning post as its axis. That is, the blade 102 and the mounting housing 101 are rotatably connected through the positioning hole and the positioning post. The blade 102 also has a movable hole, and the drive member 1041 has a limiting post that slides within the movable hole. The movable hole has a travel space for the limiting post to slide. When the drive member 1041 rotates, the limiting post moves within the movable hole and drives the blade 102 to rotate. It is worth mentioning that the travel space of the movable hole can limit the rotation angle of the blade 102 to ensure that the blade 102 rotates within a preset angle range.

[0145] In some embodiments, the aperture circuit board 103 is a flexible printed circuit board, and its flatness can be ensured by adhering to the bottom surface of the mounting housing 101. Furthermore, the aperture circuit board 103 can be bonded and fixed to the bottom surface of the mounting housing 101 to increase its flatness.

[0146] Furthermore, a positioning element is provided on the bottom surface of the mounting housing 101, and a circuit board positioning through hole is provided at the corresponding position of the aperture circuit board 103. Therefore, the mounting position of the aperture circuit board 103 can be positioned by the cooperation of the circuit board positioning through hole and the positioning element, which makes the assembly process more convenient.

[0147] In some embodiments, the variable aperture mechanism 10 further includes a locking tab 106, which is disposed on the mounting housing 101 to avoid the aperture light-passing hole 100, and holds the blade 102 between the locking tab 106 and the mounting housing 101. The locking tab 106 improves the overall stability of the variable aperture mechanism 10 and protects the internal components. Furthermore, a black object is provided on the object-side surface of the locking tab 106 to prevent light reflection. Furthermore, the mounting housing 101 has a positioning block on the surface opposite to the locking tab 106, and the locking tab 106 forms a positioning groove at a position corresponding to the positioning block. Through the cooperation of the positioning block and the positioning groove, the locking tab 106 is held in a preset position on the mounting housing 101.

[0148] Furthermore, the locking plate 106 is provided with clearance holes to prevent interference with the positioning post and the limiting post. In order to make the structure of the variable aperture mechanism 10 as compact as possible, it is necessary to reduce the gap between the locking plate 106 and the blade 102. However, in order to improve the installation stability of the blade 102 and the positioning post and the limiting post, the height of the positioning post and the limiting post should not be too low. Based on the above considerations, clearance holes are provided on the locking plate 106, which can both allow the height of the positioning post and the limiting post to exceed that of the blade 102 and avoid increasing the overall thickness of the variable aperture mechanism 10.

[0149] The aperture circuit board 103 and the locking plate 106 can be a ring structure, thus integrally surrounding the light-transmitting hole 100 and mounted on the mounting housing 101. Preferably, the diameter of the hole at the center of the ring is not less than the maximum diameter of the entrance hole, so that the light flux is determined by the diameter of the entrance hole. The aperture circuit board 103 and the locking plate 106 can also be designed as separate components, thus being arranged in segments along the circumference on the mounting housing 101.

[0150] In some embodiments, the bottom surface of the drive member 1041 has a first component, and the mounting housing 101 has a second component opposite to the first component. The drive member 1041 and the mounting housing 101 are in contact along the optical axis through the first and second components. When the drive member 1041 rotates relative to the mounting housing 101, the friction between them increases the required driving force. By reducing the contact area between the drive member 1041 and the mounting housing 101, it is beneficial to reduce the friction between them. In this embodiment, the drive member 1041 and the mounting housing 101 are in contact through the first and second components, which can reduce the friction when the drive member 1041 moves relative to the mounting housing 101.

[0151] In some embodiments, the first component and the second component are a boss and a slide groove, respectively. When the drive member 1041 rotates relative to the mounting housing 101, the boss slides within the slide groove. The design of the boss and the slide groove ensures that the contact area between the drive member 1041 and the mounting housing 101 is reduced without increasing the overall thickness, thus making full use of the internal space. Moreover, the cooperation between the boss and the slide groove can limit the displacement of the drive member 1041, ensuring that the drive member 1041 rotates within a preset angle range along a preset direction.

[0152] In some modified embodiments, the first component and the second component are a ball and a ball groove, respectively. The ball is adapted to roll in the ball groove, and the ball groove can limit the displacement of the ball to ensure that the drive member 1041 rotates along a preset direction within a preset angle range.

[0153] Furthermore, the number of the first component and the second component is at least two pairs and they are equally spaced along the circumference of the aperture 10 to ensure the stability of the support.

[0154] Furthermore, an elastic element 108 can be provided between the mounting housing 101 and the driving member 1041. One end of the elastic element 108 is fixed to the driving member 1041, and the other end is fixed to the mounting housing 101. The mounting positions of the elastic element 108 on the mounting housing 101 and the driving member 1041 are at the same height. Figure 13 As shown, after installation, the elastic element 108 is located in a plane perpendicular to the optical axis. The function of the elastic element 108 is to provide the driving member 1041 with a restoring force to return to its initial position. That is, after the working state ends, the elastic element 108 can make the driving member 1041 rotate relative to the mounting housing 101 to return to its original state. Moreover, the elastic element 108 can also connect the mounting housing 101 and the driving member 1041. When the variable aperture mechanism 10 is subjected to external force, it can ensure that the two do not move relative to each other, and can avoid various problems caused by collisions of internal components.

[0155] According to one aspect of this application, a motor drive device is provided, comprising: a focusing drive mechanism 8 for driving an optical lens to move along an optical axis; a variable aperture mechanism 10 for adjusting the amount of light transmitted through the optical lens; an upper circuit system 4 located on the upper side of the motor drive device, the upper circuit system 4 being connected to the focusing drive mechanism 8 and the variable aperture mechanism 10 respectively; and a lower circuit system 5 located on the lower side of the motor drive device, the lower circuit system 5 being connected to the upper circuit system 4, and the lower circuit system 5 being adapted to be connected to an external power supply device.

[0156] The motor drive unit uses the upper circuit system 4 and the lower circuit system 5 to connect the focusing drive mechanism 8 and the variable aperture mechanism 10 to the external power supply equipment, which helps to simplify the circuit design and realize the miniaturization of the overall structure.

[0157] According to another aspect of this application, a motor drive device is provided, comprising: a base 1; an outer frame 2, movably resting on the base 1 in a direction orthogonal to the optical axis, and having a first sidewall and a second sidewall parallel to each other; at least one support element, disposed on the upper side of the base 1 and movably supporting the outer frame 2; an inner frame 3, disposed inside the outer frame 2 and movable along the optical axis, wherein an optical lens is adapted to be disposed inside the inner frame 3; a focusing drive mechanism 8 for driving the inner frame 3 to move along the optical axis; an optical image stabilization drive mechanism 7 for driving the outer frame 2 to move in a direction orthogonal to the optical axis; and at least one pair of side springs 6, the side springs connecting the base 1 and the outer frame 2, and the pair of side springs 6 being respectively disposed on the first sidewall and the second sidewall, wherein the side springs 6 are adapted to elastically deform to accommodate the relative displacement between the outer frame 2 and the base 1.

[0158] The motor drive device utilizes the cooperation of the support element and the side spring 6 to realize the movement of the outer frame 2 in the plane orthogonal to the optical axis. The support element allows the outer frame 2 to be displaced relative to the base 1 in multiple directions, and the side spring 6 makes the connection between the outer frame 2 and the base 1 more stable, and can drive the outer frame 2 to return to the initial position after displacement.

[0159] This application also provides a camera module, including the motor drive device mentioned above, an optical lens (not shown in the figure) disposed in the light-transmitting hole of the motor drive device, and a photosensitive component (not shown in the figure). The photosensitive component is disposed below the motor drive device and opposite to the light-transmitting hole 11 of the base. The photosensitive component is used to receive the light converged by the optical lens and perform photoelectric conversion.

[0160] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A motor drive device, characterized in that, include: Base; The outer frame is movably supported on the base in the direction orthogonal to the optical axis and has a first sidewall and a second sidewall that are parallel to each other. At least one support element is disposed on the upper side of the base and movably supports the outer frame; An inner frame is disposed inside the outer frame and is movable along the optical axis, and an optical lens is adapted to be disposed inside the inner frame. A focusing drive mechanism is used to drive the inner frame to move along the optical axis. An optical image stabilization drive mechanism is used to drive the outer frame to move in a direction orthogonal to the optical axis; At least one pair of side springs, the side springs connecting the base and the outer frame, and the pair of side springs respectively disposed on the first side wall and the second side wall, the side springs being adapted to elastically deform to accommodate the relative displacement between the outer frame and the base; The motor drive device includes an upper circuit system disposed on the inner frame and a lower circuit system disposed on the base. The two ends of the side spring are electrically connected to the upper circuit system and the lower circuit system respectively. The upper circuit system is connected to the focusing drive mechanism, and the lower circuit system is connected to the optical image stabilization drive mechanism. The side spring includes a first positioning end electrically connected to the lower circuit system, a second positioning end electrically connected to the upper circuit system, and an elastic deformation portion elastically connecting the first positioning end and the second positioning end. The elastic deformation portion includes a first elastic portion providing deformation in a first direction and a second elastic portion providing deformation in a second direction, so that the side spring is adapted to elastically deform to accommodate the displacement of the outer frame relative to the base in the first direction and the second direction.

2. The motor drive device according to claim 1, characterized in that, The motor drive device includes two pairs of side springs, which are symmetrically arranged at both ends of the first sidewall and the second sidewall.

3. The motor drive device according to claim 1, characterized in that, The first elastic portion extends along the optical axis, is parallel to the first sidewall or the second sidewall, and the first direction is perpendicular to the first sidewall or the second sidewall. The second elastic portion is connected to the first elastic portion, and the second elastic portion has multiple curved portions. The second direction is parallel to the first sidewall or the second sidewall.

4. The motor drive device according to claim 3, characterized in that, The curved portion is S-shaped.

5. The motor drive device according to claim 1, characterized in that, The upper circuit system includes an upper circuit board and at least one connecting spring. The upper circuit board is disposed on the upper end face of the inner frame. The connecting spring connects the inner frame and the outer frame. One end of the connecting spring is electrically connected to the upper circuit board, and the other end is electrically connected to the side spring.

6. The motor drive device according to any one of claims 1-5, characterized in that, The support element is a ball bearing, and under the support of the ball bearing, the base is adapted to move in a plane orthogonal to the optical axis.

7. The motor drive device according to claim 6, characterized in that, The upper surface of the base has at least one first ball groove, and the bottom surface of the outer frame has a second ball groove opposite to the first ball groove. A ball movement cavity is defined between the first ball groove and the second ball groove. The ball is disposed in the ball movement cavity so that the outer frame is adapted to move relative to the base along the direction of the first ball groove or the second ball groove.

8. The motor drive device according to claim 7, characterized in that, The first ball groove and the second ball groove extend in perpendicular directions to each other.

9. The motor drive device according to claim 7, characterized in that, Both sides of the first ball groove along the extending direction are in contact with the ball, and both sides of the second ball groove along the extending direction are in contact with the ball.

10. The motor drive device according to claim 7, characterized in that, The base has a base support at each of its four corners on the upper surface. The base support protrudes toward the outer frame, and the upper surface of the base support forms the first ball groove.

11. The motor drive device according to any one of claims 1-5, characterized in that, include: At least one common magnet pair is disposed on the outer frame; A focusing drive coil is disposed on the outer side of the inner frame sidewall, the focusing drive coil is opposite to the common magnet pair, and the interaction between the focusing drive coil and the common magnet pair is adapted to drive the inner frame to move along the optical axis. An optical image stabilization drive coil is disposed below the outer frame, the optical image stabilization drive coil is opposite to the common magnet pair, and the interaction between the optical image stabilization drive coil and the common magnet pair is adapted to drive the outer frame to move in a direction orthogonal to the optical axis.

12. The motor drive device according to claim 11, characterized in that, The motor drive device includes two common magnet pairs, which are respectively disposed on a pair of parallel sidewalls of the outer frame.

13. The motor drive device according to claim 11, characterized in that, It also includes at least one optical image stabilization drive magnet pair, which is disposed on the side wall of the outer frame where the common magnet pair is not disposed. The optical image stabilization drive magnet pair is opposite to the optical image stabilization drive coil, and the interaction between the optical image stabilization drive magnet pair and the optical image stabilization drive coil is adapted to drive the outer frame to move in a direction orthogonal to the optical axis.

14. The motor drive device according to claim 13, characterized in that, The motor drive device includes two pairs of optical image stabilization drive magnets, which are respectively disposed on a pair of opposite sidewalls of the outer frame where the common magnet pair is not disposed.

15. The motor drive device according to claim 13, characterized in that, The motor drive device includes a plurality of optical image stabilization drive coils, each optical image stabilization drive magnet pair and each common magnet pair being opposite to an optical image stabilization drive coil.

16. The motor drive device according to claim 13, characterized in that, The thickness of the optical image stabilization driving magnet pair in the optical axis direction is less than that of the common magnet pair, the top surface of the optical image stabilization driving magnet pair is lower than the top surface of the common magnet pair, and a first magnetic yoke for enhancing magnetic force circulation is provided above the optical image stabilization driving magnet pair.

17. The motor drive device according to claim 16, characterized in that, A second magnetic yoke is also provided below the optical image stabilization drive magnet pair, and the second magnetic yoke is opposite to the first magnetic yoke.

18. The motor drive device according to claim 17, characterized in that, The first magnetic yoke and the second magnetic yoke are metal sheets. The first magnetic yoke is embedded in the outer frame, and the second magnetic yoke is disposed in the base.

19. The motor drive device according to claim 18, characterized in that, The supporting element is a ball bearing, the upper surface of the base has at least one first ball bearing groove, the bottom surface of the outer frame has a second ball bearing groove opposite to the first ball bearing groove, and a ball bearing movable cavity is defined between the first ball bearing groove and the second ball bearing groove. The end of the first magnetic yoke extends into the second ball groove of the outer frame and forms the bottom surface of the second ball groove; The end of the second magnetic yoke extends into the first ball groove of the base and forms the bottom surface of the first ball groove.

20. A camera module, characterized in that, It includes an optical lens, a photosensitive component, and a motor drive device as described in any one of claims 1-19, wherein the motor drive device is arranged around the optical lens, and the photosensitive component is arranged below the motor drive device for receiving the light converged by the optical lens and performing photoelectric conversion.

Images