Motor carrier self-locking device and camera module

Abstract

The utility model relates to a motor carrier self-locking device and a camera module, and the motor carrier self-locking device comprises a Z-direction limiting unit which comprises a limiting part which is fixedly arranged on the outer side wall of a motor carrier or the inner side wall of a housing; the movable part is arranged on the shell when the limiting part is fixedly arranged on the motor carrier; or when the limiting part is fixedly arranged on the shell, the movable part is mounted on the motor carrier; the movable part can move to a locking position under the action of external force and is matched with the limiting part to realize self-locking; the driving part is used for providing external force when needed, so that the movable part moves to the locking position; and the reset part is used for enabling the movable part to automatically return to the initial position after the external force is removed so as to realize unlocking. According to the utility model, the water ripple phenomenon of the motor under high-frequency vibration can be effectively relieved or eliminated on the premise of not sacrificing the size and power consumption of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of camera modules, and in particular to a motor carrier self-locking device and a camera module. Background Art

[0002] With the rapid development of mobile communications technology and the increasing penetration of smartphones, mobile phone cameras, as essential tools for capturing life and sharing moments, are facing increasingly stringent performance requirements. Among the many camera performance indicators, video recording stability and clarity are key factors, directly impacting the user experience. To achieve high-quality video recording, optimizing the performance of the voice coil motor (VCM), the driving component within mobile phone cameras, is particularly important.

[0003] The VCM motor, which electromagnetically drives the lens for rapid and precise movement, is a core component that enables features like autofocus and optical image stabilization. However, in practice, particularly when the VCM motor is in high-frequency vibration during recording, a phenomenon known as "water ripple" often occurs. This phenomenon manifests as periodic fluctuations of light and dark stripes in the video image, seriously affecting the smoothness and visual quality of the video.

[0004] Analysis has shown that the moiré phenomenon is closely related to the design of the spring inside the VCM motor. As the bridge connecting the lens assembly and the drive mechanism, the spring's mechanical properties directly influence the motor's vibration characteristics and stability. Specifically, the spring's stiffness (usually expressed as the K value) is a key factor influencing the moiré phenomenon. A smaller K value means the spring is more likely to deform when subjected to force, resulting in more noticeable jitter under high-frequency vibrations and exacerbating the moiré phenomenon. Conversely, a larger K value reduces spring deformation, which should theoretically reduce the appearance of moiré.

[0005] However, simply increasing the K value isn't a foolproof solution to the water ripple problem. This is because increasing the K value reduces the spring's deformability. To achieve the same lens displacement, a greater Lorentz force must be applied. This means either increasing the magnet's volume or magnetic strength, increasing the coil's size, or increasing the drive current. Adjusting these parameters not only directly impacts the VCM motor's design and increases the complexity of its design and manufacturing, but also places higher demands on the motor's power consumption, hindering overall energy efficiency and battery life.

[0006] Therefore, how to effectively alleviate or eliminate the water ripple phenomenon of VCM motors under high-frequency vibration without sacrificing motor size and power consumption has become a technical problem that needs to be urgently solved in the current mobile phone camera industry. Summary of the Invention

[0007] The purpose of the utility model is to provide a motor carrier self-locking device and a camera module, which can effectively alleviate or eliminate the water ripple phenomenon of the motor under high-frequency vibration without sacrificing the size and power consumption of the motor.

[0008] In a first aspect, a motor carrier self-locking device according to the present invention includes a Z-axis limiting unit, which includes:

[0009] A limiting component is fixedly arranged on the outer side wall of the motor carrier or the inner side wall of the shell;

[0010] A movable component, when the limiting component is fixedly provided on the motor carrier, the movable component is mounted on the housing; or when the limiting component is fixedly provided on the housing, the movable component is mounted on the motor carrier; the movable component can be moved to a locked position under the action of an external force and cooperate with the limiting component to achieve self-locking;

[0011] a driving component, configured to provide an external force when necessary to move the movable component to the locking position;

[0012] The reset component is used to automatically restore the movable component to its initial position after the external force is removed to achieve unlocking.

[0013] Optionally, the limiting component is a first limiting groove provided on the motor carrier or the housing. The limiting component is in the form of a first limiting groove, which has the advantages of simple structure and easy processing.

[0014] Optionally, the movable component is a first stop pin, which is movably disposed within a pin holder, which is disposed on the motor carrier or housing and faces the first stop slot. The first stop pin and the first stop slot cooperate to achieve the self-locking and unlocking functions of the motor carrier self-locking device, thereby having the advantages of simple structure and ease of processing.

[0015] Optionally, the driving component is a driving coil, which is sleeved outside the pin holder or the first limiting groove. When energized, the driving coil generates a magnetic field, which causes the first limiting pin to move to a position where it contacts the limiting groove, thereby achieving self-locking. When the driving coil is de-energized, the first limiting pin does not contact the limiting groove, thereby achieving unlocking.

[0016] Optionally, the end of the first limiting pin has an inclined surface or a spherical surface that matches the first limiting groove, so that the first limiting pin can slide smoothly into the first limiting groove under the action of the magnetic field.

[0017] Optionally, the reset component is a return spring, one end of the return spring is connected to the pin seat, and the other end of the return spring is connected to the first limiting pin.

[0018] Optionally, there are two Z-direction limiting units, and they are arranged symmetrically.

[0019] Optionally, an XY limit unit is further included, which includes:

[0020] A first limiting member and / or a second limiting member provided on the top surface of the motor base;

[0021] and a second limiting member and / or a first limiting member provided on the bottom surface of the motor carrier;

[0022] The first limiting member is a second limiting groove or a second limiting pin;

[0023] When the first limiting member is a second limiting groove, the second limiting member is a second limiting pin;

[0024] When the first limiting member is a second limiting pin, the second limiting member is a second limiting groove, which can achieve limiting in the X direction and the Y direction.

[0025] Optionally, there are two XY-axis limiting units, which are symmetrically arranged.

[0026] The utility model provides a camera module, which adopts the motor carrier self-locking device described in the utility model.

[0027] The utility model has the following advantages: after the motor carrier self-locking device is provided, the utility model can lock the motor carrier when high-frequency vibration occurs, so that the lens is fixed in a fixed position, thereby eliminating the resonance caused by the high-frequency vibration and effectively solving the problem of "water ripples" that appear when shooting videos during high-frequency vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is one of the structural schematic diagrams of the Z-direction limiting unit in the motor carrier self-locking device described in the embodiment of the present application;

[0029] Figure 2 This is the second structural diagram of the Z-direction limiting unit in the motor carrier self-locking device according to the embodiment of the present application;

[0030] Figure 3 Schematic diagram of the structure of the XY-axis limiting unit in the motor carrier self-locking device according to the embodiment of the present application;

[0031] Figure 4 This is a principle block diagram of the control part of the camera module described in the embodiment of the present application;

[0032] Description of the reference numerals in the accompanying drawings:

[0033] In the figure: 1. Motor carrier, 2. AF coil, 3. Magnet, 4. Driving coil, 5. Return spring, 6. Pin seat, 7. First limit pin, 8. First limit slot, 9. Housing, 10. Second limit pin, 11. Second limit slot, 12. Motor base, 13. Processor, 14. Hall sensor, 15. Operation switch, 16. Vibration detection module. DETAILED DESCRIPTION

[0034] The following describes the implementation of the technical solution of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. The present invention may also be implemented or applied through different specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0035] like Figures 1 to 4 As shown, in an embodiment of the present application, a motor carrier self-locking device includes a Z-direction limiting unit, and the Z-direction limiting unit includes a limiting component, a movable component, a driving component and a resetting component. The limiting component is fixedly arranged on the outer wall of the motor carrier 1 or the inner wall of the shell 9. When the limiting component is fixedly arranged on the motor carrier 1, the movable component is installed on the shell 9; or when the limiting component is fixedly arranged on the shell 9, the movable component is installed on the motor carrier 1; the movable component can be moved to a locking position under the action of an external force and cooperate with the limiting component to achieve self-locking. The driving component is used to provide external force when necessary to move the movable component to the locking position. The resetting component is used to automatically restore the movable component to its initial position after the external force is removed to achieve unlocking.

[0036] like Figure 1 As shown, in some possible embodiments, the limiting component is a first limiting groove 8, and the first limiting groove 8 is provided on the motor carrier 1. The limiting component adopts the form of the first limiting groove, which has the advantages of simple structure and easy processing.

[0037] like Figure 2 As shown, in other embodiments, the first limiting groove 8 may also be provided on the housing 9 .

[0038] like Figure 1As shown, in some possible embodiments, the movable component is a first limit pin 7, which is movably disposed in a pin holder 6. When a first limit slot 8 is disposed on the motor carrier 1, the pin holder 6 is then disposed on the housing 9 and directly faces the first limit slot 8. The first limit pin 7 and the first limit slot 8 are used in conjunction with each other to realize the self-locking and unlocking functions of the self-locking device of the motor carrier 1, which has the advantages of a simple structure and easy processing. Before locking the motor carrier 1, it is necessary to first energize the AF coil 2. The AF coil 2 cooperates with the magnet 3 to drive the motor carrier 1 to move to the bottom, at which point the AF coil 2 is de-energized. Then, the drive coil 4 is energized to drive the first limit pin 7 to extend into the pin holder 6.

[0039] like Figure 1 As shown, in some possible embodiments, the driving component is a driving coil 4, which is sleeved outside the pin holder 6. The driving coil 4 is used to generate a magnetic field when powered, and the magnetic field causes the first limiting pin 7 to move to a position where it contacts the first limiting groove 8, thereby achieving self-locking. When the driving coil 4 is not powered, the first limiting pin 7 does not contact the first limiting groove 8, thereby achieving unlocking.

[0040] In other embodiments, the driving coil 4 may also be sleeved outside the first limiting groove 8 (not shown in the figures).

[0041] like Figure 1 As shown, in some possible embodiments, the end of the first limiting pin 7 has an inclined surface matching the first limiting groove 8, so that the first limiting pin can slide smoothly into the first limiting groove 8 under the action of the magnetic field.

[0042] In other embodiments, the end of the first limiting pin 7 may also be a spherical surface. In this case, the first limiting groove 8 should be a groove that matches the shape of the end of the first limiting pin 7 .

[0043] like Figure 1 As shown, in some possible embodiments, the reset component is a return spring 5, one end of which is connected to a pin holder 6, and the other end of which is connected to a first limiting pin 7. When the drive coil 4 is de-energized, the first limiting pin 7 is returned to its initial position by the action of the return spring 5.

[0044] like Figure 1 As shown, in some possible embodiments, there are two Z-direction limiting units, which are symmetrically arranged.

[0045] like Figure 3As shown, in some possible embodiments, a motor carrier self-locking device further includes an XY-direction limiting unit, and the XY-direction limiting unit includes at least one limiting assembly. Each limiting assembly includes a first limiting member and a second limiting member. The first limiting member is arranged on the top surface of the motor base 12; the second limiting member is arranged on the bottom surface of the motor carrier 1 and is opposite to the first limiting member. When the first limiting member is the second limiting groove 11, the second limiting member is the second limiting pin 10. When the first limiting member is the second limiting pin 10, the second limiting member is the second limiting groove 11. The XY-direction limiting unit can be used to limit the motor carrier 1 in the X and Y directions.

[0046] In some possible embodiments, the longitudinal section of the second limiting groove 11 is trapezoidal, and the longitudinal section of the second limiting pin 10 is also trapezoidal, and the shapes of the two are adapted to each other.

[0047] like Figure 3 As shown, in some possible embodiments, an XY-axis limiting unit includes two limiting components: a second limiting groove 11 and a second limiting pin 10 are provided on the motor carrier 1, and a second limiting pin 10 and a second limiting groove 11 are correspondingly provided on the motor base 12. The two limiting components are used to limit the motor carrier 1 in the X and Y directions.

[0048] like Figure 2 As shown, in some possible embodiments, there are two XY-axis limiting units, which are symmetrically arranged, and the limiting effect is better.

[0049] In the embodiment of the present application, an AF coil 2 is provided on the motor carrier 1, and a magnet 3 is provided at the corresponding position of the shell 9. AF focusing is achieved through the cooperation of the AF coil 2 and the magnet 3. This part belongs to the existing technology and will not be repeated here.

[0050] In an embodiment of the present application, a camera module adopts a motor carrier self-locking device as in the embodiment of the present application.

[0051] like Figure 4 As shown, in a possible embodiment, a camera module further includes a Hall sensor 14 for detecting the state of the first limit pin 7, so as to provide real-time feedback on the self-locking or unlocking state of the motor carrier self-locking device. The Hall sensor 14 is a sensor that can detect parameters such as the presence, strength, and direction of a magnetic field. When the drive coil 4 is energized, the drive coil 4 will generate a magnetic field. The Hall sensor 14 can sense the strength and direction of the magnetic field generated by the drive coil 4, and based on the magnetic field strength and direction information, determine whether the motor carrier self-locking device is in a self-locking state or an unlocking state. There is no limitation on the position of the Hall sensor 14, as long as it can accurately sense the magnetic field strength and direction information.

[0052] like Figure 4 As shown, in a possible embodiment, a camera module further includes a shake detection module 16, which uses at least one of an accelerometer and a gyroscope. It is used to detect the shake information of the camera module. When the camera module is determined to be in high-frequency vibration based on the detected shake information, the drive coil 4 is energized. After the drive coil 4 is energized, a magnetic field is generated. Under the action of the magnetic field, the first limit pin 7 can be driven to move toward the motor carrier 1 and extend into the first limit slot 8, thereby switching the motor carrier self-locking device from an unlocked state to a self-locked state. At this time, the motor carrier 1 cannot move up and down, that is, the motor carrier 1 is limited in the Z direction. At the same time as the first limit pin 7 extends into the first limit slot 8, the second limit pin 10 also extends into the second limit slot 11, thereby limiting the movement of the motor carrier 1 in the X and Y directions.

[0053] When it is determined based on the detected jitter information that the camera module is not in high-frequency vibration, the drive coil 4 is not energized. At this time, the first limit pin 7 returns to its initial position under the action of the return spring 5. At this time, the self-locking device of the motor carrier 1 is in an unlocked state.

[0054] In the embodiment of the present application, by setting a motor carrier self-locking device, when high-frequency vibration occurs, the motor carrier 1 can be locked to fix the lens in a fixed position. This can eliminate the resonance caused by the high-frequency vibration and effectively solve the existing problem of "water ripples" that appear when shooting videos during high-frequency vibration.

[0055] like Figure 4 As shown, in an embodiment of the present application, to enable manual operation, when the camera module is used in an electronic device, an operating switch 15 is provided on the electronic device. When the operating switch 15 is detected to be triggered, the motor carrier self-locking device is unlocked or locked accordingly based on the triggering state. The electronic device provides the user with the option of manually controlling the self-locking function. The processor 13 is part of the electronic device.

[0056] like Figure 4 As shown, in some possible embodiments, the processor 13 is connected to the Hall sensor 14 , the drive coil 4 , the AF coil, the operation switch, and the vibration detection module 16 , respectively.

[0057] In the embodiments of this application, the term "high frequency" does not have an absolute, unified definition, as it depends on a variety of factors, including the response speed of the anti-shake system, the sensitivity of the sensor, and the anti-shake performance requirements of specific application scenarios. Generally speaking, any vibration that is greater than or equal to a preset vibration threshold (obtained through calibration) can be considered high-frequency vibration.

[0058] In the embodiment of the present application, the Z direction represents the height direction of the camera module, the X direction represents the length direction of the camera module, and the Y direction represents the width direction of the camera module.

[0059] The above embodiments are preferred implementation methods of the present invention, but the implementation methods of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

Claims

1. A motor carrier self-locking device, characterized in that: It includes a Z-axis limit unit, which includes: A limiting component fixedly arranged on the outer side wall of the motor carrier (1) or the inner side wall of the housing (9); A movable component, when the limiting component is fixedly arranged on the motor carrier (1), the movable component is mounted on the housing (9); or when the limiting component is fixedly arranged on the housing (9), the movable component is mounted on the motor carrier (1); the movable component can be moved to a locked position under the action of an external force and cooperate with the limiting component to achieve self-locking; a driving component, configured to provide an external force when necessary to move the movable component to the locking position; The reset component is used to automatically restore the movable component to its initial position after the external force is removed to achieve unlocking.

2. The motor carrier self-locking device according to claim 1, characterized in that: The limiting component is a first limiting groove (8) provided on the motor carrier (1) or the housing (9).

3. The motor carrier self-locking device according to claim 2, characterized in that: The movable component is a first limiting pin (7), which is movably arranged in a pin seat (6). The pin seat (6) is arranged on the motor carrier (1) or the housing (9) and is opposite to the first limiting slot (8).

4. The motor carrier self-locking device according to claim 3, characterized in that: The driving component is a driving coil (4), which is sleeved outside the pin seat (6) or the first limiting groove (8).

5. The motor carrier self-locking device according to claim 3, characterized in that: The end of the first limiting pin (7) has an inclined surface or a spherical surface that matches the first limiting groove (8).

6. The motor carrier self-locking device according to claim 3, characterized in that: The reset component is a return spring (5), one end of the return spring (5) is connected to the pin seat (6), and the other end of the return spring (5) is connected to the first limiting pin (7).

7. The motor carrier self-locking device according to claim 1, characterized in that: There are two Z-direction limiting units, which are symmetrically arranged.

8. The motor carrier self-locking device according to claim 1, characterized in that: Also includes an XY limit unit, which includes: A first limiting member and / or a second limiting member provided on the top surface of the motor base (12); and a second limiting member and / or a first limiting member provided on the bottom surface of the motor carrier (1); The first limiting member is a second limiting groove (11) or a second limiting pin (10); When the first limiting member is a second limiting groove (11), the second limiting member is a second limiting pin (10); When the first limiting member is a second limiting pin (10), the second limiting member is a second limiting groove (11).

9. The motor carrier self-locking device according to claim 8, characterized in that: There are two XY limit units, which are symmetrically arranged.

10. A camera module, characterized in that: A motor carrier self-locking device as described in any one of claims 1 to 9 is used.

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