Voice coil motor, camera module and electronic equipment

Abstract

The invention relates to a voice coil motor, a camera module and electronic equipment, the voice coil motor comprises a stator assembly, a rotor assembly and a locking assembly, the rotor assembly is movably connected with the stator assembly, and the rotor assembly is used for setting a lens; the locking assembly is connected with at least one of the stator assembly and the rotor assembly; the voice coil motor has a first working state and a second working state; wherein in the first working state, the mover assembly is used for driving the lens to move relative to the stator assembly in the optical axis direction of the lens, and in the second working state, the locking assembly is used for locking the position of the mover assembly relative to the stator assembly. According to the voice coil motor, the camera module and the electronic equipment, the voice coil motor can meet the requirement of focusing in the camera module in the first working state, and the position of the rotor assembly relative to the stator assembly is locked in the second working state, so that the rotor assembly does not move relative to the stator assembly; and therefore, abnormal sound caused by collision of the mover assembly with other structures can be avoided.

Description

Technical Field

[0001] This application relates to the technical field of electronic devices, and particularly to voice coil motors, camera modules, and electronic devices. Background Art

[0002] As a functional module for realizing the shooting function of electronic devices such as mobile phones, tablet computers, and smart watches, the imaging performance of the camera module directly affects the shooting experience of the electronic device.

[0003] In related technologies, a lens is usually disposed on a mover assembly of a VCM (Voice Coil Actuator), so as to adjust the optical path between the lens and the photosensitive chip by the power provided by the VCM, thereby enabling focusing and / or defocusing.

[0004] However, when the voice coil motor is not powered on, the mover assembly is likely to move relative to the stator assembly as the camera module shakes, generating a knocking sound, and this abnormal sound will affect the user experience. Summary of the Invention

[0005] This application provides a voice coil motor, a camera module, and an electronic device to solve the technical problem of how to easily generate a knocking sound when the voice coil motor is not powered on.

[0006] On the one hand, this application provides a camera module, including:

[0007] A stator assembly;

[0008] A mover assembly, movably connected to the stator assembly, and the mover assembly is used to set a lens; and

[0009] A locking assembly, connected to at least one of the stator assembly and the mover assembly;

[0010] The voice coil motor has a first working state and a second working state; wherein, in the first working state, the mover assembly is used to drive the lens to move relative to the stator assembly along the optical axis direction of the lens, and in the second working state, the locking assembly is used to lock the position of the mover assembly relative to the stator assembly.

[0011] In one embodiment, the voice coil motor includes a rolling member, the rolling member is disposed between the mover assembly and the stator assembly, and the rolling member is used to guide the mover assembly to move relative to the stator assembly along the optical axis direction of the lens; and / or, the voice coil motor includes a shaft member, the mover assembly is slidably connected to the stator assembly through the shaft member, and the shaft member is used to guide the mover assembly to move relative to the stator assembly along the optical axis direction of the lens.

[0012] In one embodiment, the stator assembly includes a fixed seat and a first coil, and the first coil is disposed on the fixed seat; the mover assembly further includes a movable seat and a first permanent magnet. The movable seat has a mounting opening for mounting the lens, and the first permanent magnet is disposed on the movable seat. In the first working state, the first coil is energized to interact with the first permanent magnet, so that the movable seat moves relative to the fixed seat along the optical axis direction of the lens.

[0013] In one embodiment, the locking assembly includes a second coil, a second permanent magnet, and a reset member. The second coil is disposed on the fixed seat. The fixed seat is provided with a mounting hole, and the second permanent magnet movably passes through the mounting hole and faces the second coil; wherein, the second permanent magnet is configured to have a tendency to move towards the movable seat under the action of the reset member, and the second coil is configured to: in the first working state, the second coil is energized to adsorb the second permanent magnet, so that the second permanent magnet keeps a distance from the movable seat; in the second working state, the second permanent magnet moves to cooperate with the movable seat under the action of the reset member.

[0014] In one embodiment, the reset member includes a third permanent magnet disposed on the movable seat and facing the second permanent magnet. In the second working state, the third permanent magnet generates an attractive force on the second permanent magnet to drive the second permanent magnet to move to cooperate with the movable seat; and / or, the reset member includes an elastic member disposed on the fixed seat. In the second working state, the elastic member drives the second permanent magnet to cooperate with the movable seat.

[0015] In one embodiment, the movable seat is provided with a locking groove. In the second working state, one end of the second permanent magnet cooperates with the locking groove; in the first working state, the second coil is energized and adsorbs the second permanent magnet, so that the second permanent magnet withdraws from the locking groove.

[0016] In one embodiment, the voice coil motor further includes a first circuit board. The first coil and the second coil are both electrically connected to the first circuit board. The first circuit board is configured to: the first circuit board can control the voice coil motor to switch between the first working state and the second working state, and in the first working state, the first circuit board makes the first coil and the second coil both energized.

[0017] In one embodiment, in the second working state, the first circuit board makes the first coil and the second coil both de-energized.

[0018] In one embodiment, the first coil and the second coil are connected in series with each other.

[0019] In one embodiment, the first coil and the second coil are wound from the same metal conductor.

[0020] On the other hand, the present application provides an imaging module, including a lens, an image sensor chip, and the above-mentioned voice coil motor. The lens is disposed on the light-sensitive side of the image sensor chip along its optical axis and is connected to the moving component of the voice coil motor.

[0021] On the other hand, the present application provides an electronic device, including a device body and the above-mentioned imaging module, and the imaging module is connected to the device body.

[0022] For the above-mentioned voice coil motor, imaging module and electronic device, the voice coil motor includes a stator component and a moving component. In the first working state of the voice coil motor, the moving component can drive the lens to move relative to the stator component along the optical axis direction of the lens, so that the voice coil motor can be suitable for the need of focusing or defocusing in the imaging module. Based on this, the first working state can be considered as the state of using the voice coil motor for focusing and / or defocusing. Since a locking component is provided in the voice coil motor and the position of the moving component relative to the stator component is locked when the voice coil motor is in the second working state, when the voice coil motor does not need to focus and / or defocus the lens, the moving component will not move relative to the stator component, and thus the moving component will not hit other structures and generate abnormal sounds. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 It is a schematic perspective view of an imaging module according to an embodiment.

[0025] Figure 2 It is an exploded schematic view of an imaging module according to an embodiment.

[0026] Figure 3 For Figure 2 The partial enlarged schematic view of the imaging module corresponding to the circle A in

[0027] Figure 4 For Figure 2 The partial enlarged schematic view of the imaging module corresponding to the circle B in

[0028] Figure 5 It is a top view structural schematic diagram of an imaging module according to an embodiment.

[0029] Figure 6 It is Figure 5 a cross-sectional structural schematic diagram of the imaging module shown along line I-I.

[0030] Figure 7 It is a partial enlarged structural schematic diagram of the imaging module according to an embodiment corresponding to Figure 6 the circle C in the figure, where the aperture motor is in the second working state.

[0031] Figure 8 It is a partial enlarged structural schematic diagram of the imaging module according to an embodiment corresponding to Figure 6 the circle C in the figure, where the aperture motor is in the first working state.

[0032] Figure 9 It is a partial enlarged structural schematic diagram of the imaging module according to another embodiment corresponding to Figure 6 the circle C in the figure, where the aperture motor is in the second working state.

[0033] Figure 10 It is a partial enlarged structural schematic diagram of the imaging module according to another embodiment corresponding to Figure 6 the circle C in the figure, where the aperture motor is in the first working state.

[0034] Figure 11 It is a three-dimensional structural schematic diagram of an electronic device according to an embodiment.

[0035] Figure 12 It is a structural block diagram of the electronic device provided by the present application.

[0036] Explanation of the reference numerals in the drawings:

[0037] 10. Camera module; 11. Lens; 12. Image sensor chip; 13. Voice coil motor; 131. Stator assembly; 1311. Fixed seat; 13111. Mounting hole; 1312. First coil; 1311a. First side wall; 1311b. Second side wall; 1311c. Third side wall; 1311d. Fourth side wall; 132. First side wall; 1321. Movable seat; 13211. Mounting opening; 13212. Locking groove; 1322. First permanent magnet; 133. Locking assembly; 1331. Second coil; 1332. Second permanent magnet; 13321. Receiving groove; 1333. Reset member; 13331. Third permanent magnet; 13332. Elastic member; 134. Rolling member; 135. First circuit board; 14. Second circuit board; 141. Groove; 15. Connector; 16. Base plate; 17. Filter; 18. Bracket; 19. Housing; 191. Clearance opening; 20. Device body; 21. Display screen; 22. Shell. Detailed implementation manners

[0038] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0039] As used herein, an "electronic device" refers to a device that can receive and / or send communication signals and includes, but is not limited to, a device connected by any one or more of the following connection methods:

[0040] (1) Via a wired connection method, such as via a Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), digital cable, or direct cable connection;

[0041] (2) Via a wireless interface method, such as a cellular network, Wireless Local Area Network (WLAN), digital television network such as DVB-H network, satellite network, or AM-FM broadcast transmitter.

[0042] An electronic device configured to communicate via a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

[0043] (1) Satellite phone or cellular phone;

[0044] (2)Personal Communications System (PCS) terminals that can combine cellular radiotelephones with data processing, fax, and data communication capabilities;

[0045] (3)Radiotelephones, pagers, Internet / Intranet access, Web browsers, notepads, calendars, Personal Digital Assistants (PDAs) equipped with Global Positioning System (GPS) receivers;

[0046] (4)Conventional laptop and / or palm-top receivers;

[0047] (5)Conventional laptop and / or palm-top radiotelephone transceivers, etc.

[0048] Combined Figure 1 and Figure 2 As shown, an embodiment of the present application provides an imaging module 10, which includes a lens 11, an image sensor chip 12, and a voice coil motor 13.

[0049] The lens 11 is disposed on the photosensitive side of the image sensor chip 12 along its optical axis. The voice coil motor 13 is used to drive the lens 11 to move relative to the image sensor chip 12 along the optical axis of the lens 11, so as to adjust the optical path between the lens 11 and the image sensor chip 12 to achieve the effect of focusing and / or defocusing.

[0050] The voice coil motor 13 includes a stator assembly 131 and a mover assembly 132. The mover assembly 132 is movably connected to the stator assembly 131. The mover assembly 132 is used to mount the lens 11. Specifically, the lens 11 can be connected to the mover assembly 132 by means of snap connection or threaded connection, etc. Since the lens 11 is connected to the mover assembly 132, when the mover assembly 132 moves relative to the stator assembly 131, the lens 11 will move relative to the stator assembly 131 together with the mover assembly 132.

[0051] The voice coil motor 13 has a first working state and a second working state.

[0052] In the first working state, the mover assembly 132 is used to drive the lens 11 to move relative to the stator assembly 131 along the optical axis of the lens 11, so that the voice coil motor 13 can be applied to the needs of focusing or defocusing in the imaging module 10. Based on this, the first working state can be considered as the state of using the voice coil motor 13 for focusing and / or defocusing.

[0053] In the second working state, the locking component 133 is used to lock the position of the mover component 132 relative to the stator component 131. Thus, when the voice coil motor 13 does not need to focus and / or adjust the focus of the lens 11, the mover component 132 will not move relative to the stator component 131, and then there will be no abnormal sound caused by the mover component 132 hitting other structures.

[0054] Since in the first working state, the mover component 132 is used to drive the lens 11 to move relative to the stator component 131 along the optical axis direction of the lens 11. Based on this, in the second working state, the locking component 133 is in a state where it does not lock the position of the mover component 132 relative to the stator component 131, so that the movement of the mover component 132 relative to the stator component 131 along the optical axis direction of the lens 11 is not restricted to meet the needs of focusing or defocusing.

[0055] It should be noted that the second working state is the state where the locking component 133 locks the relative position of the mover component 132 relative to the stator component 131. In this locked state, the position of the mover component 132 relative to the stator component 131 can be the position of the voice coil motor 13 after experiencing the first working state (i.e., after focusing and / or defocusing) (i.e., the focusing position and / or defocusing position), or the initial state of the voice coil motor 13 without experiencing the first working state (i.e., the initial position). Among them, if the mover component 132 moves relative to the stator component 131 to focus / defocus the lens 11 and then the voice coil motor 13 is in the second working state, and the locking component 133 locks the position of the mover component 132 relative to the stator component 131, it means that the locking component 133 locks the focusing position / defocusing position. Then, the mover component 132 does not need to continuously consume electric energy to maintain this focusing position / defocusing position, which is beneficial to reducing the power consumption of the camera module 10 for locking the shooting focal length.

[0056] For the sake of easy understanding, the structure of the voice coil motor 13 will be further described below in combination with the structural settings between the mover component 132 and the stator component 131 in the voice coil motor 13, but it does not mean that the structure of the voice coil motor 13 is limited to this.

[0057] Combined with Figure 2 and Figure 3 As shown, the voice coil motor 13 includes a rolling component 134, and the rolling component 134 is arranged between the mover component 132 and the stator component 131. The rolling component 134 is used to guide the mover component 132 to move relative to the stator component 131 along the optical axis direction of the lens 11. In this way, using the guiding effect of the rolling component 134 on the mover component 132 can improve the stability of the mover component 132 when it moves relative to the mover component 132, thus ensuring the focusing and / or defocusing effect.

[0058] The rolling component 134 includes, but is not limited to, cylindrical balls or spherical balls. This structure enables flexible rolling, thereby generating less frictional resistance, which is beneficial for maintaining the movement flexibility of the mover assembly 132 and reducing the wear of the mover assembly 132 and the stator assembly 131, so as to extend the service life of the voice coil motor 13.

[0059] It should be noted that in some embodiments, other guiding structures can also be adopted to guide the relative movement of the mover assembly 132 with respect to the stator assembly 131. For example, the voice coil motor 13 includes a shaft component (not shown in the figure), and the mover assembly 132 is slidably connected to the stator assembly 131 through the shaft component. The shaft component is used to guide the mover assembly 132 to move relative to the stator assembly 131 along the optical axis direction of the lens 11. In some embodiments, the voice coil motor 13 includes both the rolling component 134 and the shaft component, so that the rolling component 134 and the shaft component are used together to guide the relative movement of the mover assembly 132 with respect to the stator assembly 131.

[0060] Continue to combine Figure 2 As shown, the stator assembly 131 includes a fixed seat 1311 and a first coil 1312. The first coil 1312 is disposed on the fixed seat 1311. The mover assembly 132 further includes a movable seat 1321 and a first permanent magnet 1322. The movable seat 1321 has a mounting opening 13211 for mounting the lens 11. The first permanent magnet 1322 is disposed on the movable seat 1321. In the first working state, the first coil 1312 is energized to interact with the first permanent magnet 1322, so that the movable seat 1321 moves relative to the fixed seat 1311 along the optical axis direction of the lens 11. In this way, the cooperation of the first coil 1312 and the first permanent magnet 1322 is used to drive the movable seat 1321 to drive the lens 11 to move relative to the fixed seat 1311 along the optical axis direction of the lens 11 to achieve focusing and / or defocusing.

[0061] The number of the first coils 1312 and the first permanent magnets 1322 can be multiple. The multiple first coils 1312 and the multiple first permanent magnets 1322 are arranged in one-to-one correspondence, so as to increase the driving force and facilitate the stable driving of the movable seat 1321 to drive the lens 11 to move relative to the fixed work.

[0062] Continue to combine Figure 2As shown, in some embodiments, the peripheral wall of the fixed seat 1311 is arranged in a rectangular frame. Specifically, the peripheral wall of the fixed seat 1311 includes a first side wall 1311a, a second side wall 1311b, a third side wall 1311c, and a fourth side wall 1311d that are adjacent to each other in sequence. The movable seat 1321 has inner walls opposite to the respective side walls of the fixed seat 1311. The first side wall 1311a, the second side wall 1311b, and the third side wall 1311c are all provided with first coils 1312, and the number of the first permanent magnets 1322 is 3. The 3 first permanent magnets 1322 are respectively arranged on different side walls of the movable seat 1321 and correspond to the first coils 1312 on the first side wall 1311a, the second side wall 1311b, and the third side wall 1311c one by one.

[0063] For the number and installation positions of the first coils 1312 and the first permanent magnets 1322, no limitation is made herein.

[0064] Combined with Figure 1 and Figure 2 As shown, in some embodiments, the voice coil motor 13 includes a housing 19. The housing 19 is connected to the fixed seat 1311, and the two enclose an installation space. The movable seat 1321 is movably arranged in this installation space. In this embodiment, the housing 19 can be made of a metal material to improve the anti-drop performance of the voice coil motor 13. Understandably, the housing 19 is provided with a clearance opening 191 corresponding to the position of the lens 11, so that the lens 11 connected to the movable seat 1321 is exposed from the clearance opening 191 to meet the need for the lens 11 to capture external light.

[0065] Combined with Figure 3 and Figure 4 As shown, the locking assembly 133 includes a second coil 1331, a second permanent magnet 1332, and a reset member 1333. The second coil 1331 is arranged on the fixed seat 1311. The fixed seat 1311 is provided with an installation hole 13111. The second permanent magnet 1332 movably passes through the installation hole 13111 and faces the second coil 1331. Among them, the second permanent magnet 1332 is configured to have a tendency to move towards the movable seat 1321 under the action of the reset member 1333. The second coil 1331 is configured to: in the first working state, the second coil 1331 is energized to adsorb the second permanent magnet 1332, so that the second permanent magnet 1332 is spaced from the movable seat 1321; in the second working state, the second permanent magnet 1332 moves to cooperate with the movable seat 1321 under the action of the reset member 1333.

[0066] In this embodiment, in the first working state, when the second coil 1331 is energized, the second permanent magnet 1332 is adsorbed, so that the second permanent magnet 1332 is spaced from the movable seat 1321. In this way, the locking assembly 133 does not interfere with the movement of the movable seat 1321 relative to the fixed seat 1311 to meet the needs of focusing and / or defocusing. In the second working state, since the second permanent magnet 1332 can move to cooperate with the movable seat 1321 under the action of the reset member 1333, the relative position of the movable seat 1321 relative to the fixed seat 1311 is locked by the cooperation between the second permanent magnet 1332 and the movable seat 1321. Thus, when the voice coil motor 13 is in the second working state, the mover assembly 132 cannot move relative to the stator assembly 131 to avoid impact noise.

[0067] Further, as shown in Figure 4 , the movable seat 1321 is provided with a locking groove 13212. As shown in Figures 5 to 7 , in the second working state, one end of the second permanent magnet 1332 cooperates with the locking groove 13212. As shown in Figure 8 , in the first working state, the second coil 1331 is energized to adsorb the second permanent magnet 1332, so that the second permanent magnet 1332 withdraws from the locking groove 13212. In this embodiment, the cooperation between the second permanent magnet 1332 and the locking groove 13212 on the movable seat 1321 improves the stability of the second permanent magnet 1332 in locking the position of the movable seat 1321 relative to the fixed seat 1311. Thus, when the imaging module 10 is severely shaken, the movable seat 1321 can still keep the fixed seat 1311 stationary to avoid impact noise.

[0068] It should be noted here that as long as the reset member 1333 can provide a reset moving force for the second permanent magnet 1332 to move towards the movable seat 1321 in the second working state, so that the second permanent magnet 1332 moves to cooperate with the movable seat 1321.

[0069] For example, as shown in Figure 7 and Figure 8 , in some embodiments, the reset member 1333 includes a third permanent magnet 13331. The third permanent magnet 13331 is disposed on the movable seat 1321 and is opposite to the second permanent magnet 1332. In the second working state, the third permanent magnet 13331 generates an attractive force on the second permanent magnet 1332 to drive the second permanent magnet 1332 to move to cooperate with the movable seat 1321. In this embodiment, when the voice coil motor 13 is in the second working state, the magnetic attraction between the third permanent magnet 13331 and the second permanent magnet 1332 is used to drive the second permanent magnet 1332 to move towards the movable seat 1321, and finally the second permanent magnet 1332 cooperates with the movable seat 1321.

[0070] It should be noted that when the voice coil motor 13 is in the first working state and the second coil 1331 is energized, the magnetic attraction force on the second permanent magnet 1332 is greater than the magnetic attraction force of the third permanent magnet 13331 on the second permanent magnet 1332. As a result, the second permanent magnet 1332 moves toward the side where the second coil 1331 is located (i.e., the side where the second permanent magnet 1332 is away from the third permanent magnet 13331), so that the second permanent magnet 1332 leaves the movable seat 1321. In this way, the movable seat 1321 can move relative to the fixed seat 1311 along the optical axis direction of the lens 11 under the interaction of the energized first coil 1312 and the first permanent magnet 1322, so that the lens 11 moves relative to the photosensitive chip 12 along the optical axis direction of the lens 11, thereby meeting the needs of focusing and / or defocusing.

[0071] When the voice coil motor 13 is in the second working state, as long as the current in the second coil 1331 decreases or is cut off, the magnetic attraction force of the second coil 1331 on the second permanent magnet 1332 becomes weaker. Thus, when the magnetic attraction force of the second coil 1331 on the second permanent magnet 1332 weakens to be less than the magnetic attraction force between the third permanent magnet 13331 and the second permanent magnet 1332, the second permanent magnet 1332 will move toward the movable seat 1321 and cooperate with the movable seat 1321 to lock the position of the movable seat 1321 relative to the fixed seat 1311, so that the mover assembly 132 will not move relative to the stator assembly 131 and generate impact noise.

[0072] In an embodiment where the movable seat 1321 is provided with a locking groove 13212, the third permanent magnet 13331 can be disposed on the groove wall of the locking groove 13212 facing the second permanent magnet 1332, so as to facilitate making the magnetic poles of the third permanent magnet 13331 and the second permanent magnet 1332 opposite, and increasing the magnetic attraction force between the two. Due to the magnetic attraction between the third permanent magnet 13331 and the second permanent magnet 1332, the opposite magnetic poles of the third permanent magnet 13331 and the second permanent magnet 1332 face each other. For example, the S pole of the third permanent magnet 13331 faces the N pole of the second permanent magnet 1332. Or, the N pole of the third permanent magnet 13331 faces the S pole of the second permanent magnet 1332.

[0073] In some other embodiments, as shown in Figure 9 the reset member 1333 includes an elastic member 13332, and the elastic member 13332 is disposed on the fixed seat 1311. In the second working state, the elastic member 13332 drives the second permanent magnet 1332 to cooperate with the movable seat 1321. In this embodiment, the elastic acting force of the elastic member 13332 on the second permanent magnet 1332 makes the second permanent magnet 1332 have a tendency to move closer to the movable seat 1321. Thus, when the voice coil motor 13 is in the first working state, as shown inFigure 10 As shown, when the second coil 1331 is energized, it magnetically attracts the second permanent magnet 1332, overcoming the elastic force of the elastic member 13332 and causing the second permanent magnet 1332 to move away from the movable seat 1321. When the voice coil motor 13 is in the second working state, as long as the current in the second coil 1331 decreases or is cut off, the magnetic attraction force of the second coil 1331 on the second permanent magnet 1332 becomes weaker. Thus, when the magnetic attraction force of the second coil 1331 on the second permanent magnet 1332 weakens to be less than the elastic force of the elastic member 13332 acting on the second permanent magnet 1332, the second permanent magnet 1332 will be driven by the elastic member 13332 to cooperate with the movable seat 1321 to lock the position of the movable seat 1321 relative to the fixed seat 1311, so that the mover assembly 132 will not move relative to the stator assembly 131 and produce impact noise.

[0074] It should be noted that, in some embodiments, the reset member 1333 includes both the third permanent magnet 13331 and the elastic member 13332. Thus, in the second working state, the magnetic attraction force between the third permanent magnet 13331 and the second permanent magnet 1332 and the elastic force of the elastic member 13332 acting on the second permanent magnet 1332 jointly drive the second permanent magnet 1332 to move towards the movable seat 1321. In this way, the second permanent magnet 1332 can obtain greater power to move to cooperate with the movable seat 1321, improving the locking reliability.

[0075] The elastic member 13332 includes, but is not limited to, a spring or a rubber elastomer.

[0076] Continuing to refer to Figure 9 and Figure 10 As shown, a receiving groove 13321 is provided at the end of the second permanent magnet 1332 that is farther away from the movable seat 1321. A part of the structure of the elastic member 13332 is received in the receiving groove 13321. And in the first working state, when the second permanent magnet 1332 moves away from the movable seat 1321, it squeezes the elastic member 13332. The receiving groove 13321 provides a receiving space for the elastic member 13332 to avoid excessive squeezing of the elastic member 13332, so it is beneficial to maintain the stability of the elastic member 13332.

[0077] In some embodiments, another receiving space is formed by enclosing the second coil 1331. In the first working state, a part of the structure of the second permanent magnet 1332 is received in this other receiving space, and a part of the structure of the elastic member 13332 is received in this other receiving space. Thus, the second permanent magnet 1332 and the elastic member 13332 are arranged relatively compactly with respect to the second coil 1331, which is beneficial to the miniaturization of the voice coil motor 13.

[0078] Referring again to Figures 5 to 7As shown, the voice coil motor 13 further includes a first circuit board 135, and both the first coil 1312 and the second coil 1331 are electrically connected to the first circuit board 135. In an embodiment where the voice coil motor 13 is provided with a plurality of first coils 1312, the second coil 1331 and one of the first coils 1312 are arranged on the same side wall of the fixed seat 1311, and the first circuit board 135 is arranged on the same side wall, so as to simplify the wiring for electrically connecting both the first coil 1312 and the second coil 1331 to the first circuit board 135.

[0079] The first circuit board 135 is configured to: the first circuit board 135 can control the voice coil motor 13 to switch between a first working state and a second working state, and in the first working state, the first circuit board 135 makes both the first coil 1312 and the second coil 1331 energized.

[0080] In this embodiment, the first circuit board 135 is used to control the energization of the first coil 1312 and the second coil 1331, so that both the first coil 1312 and the second coil 1331 can be in an energized state in the first working state. At this time, the second coil 1331 acts on the second permanent magnet 1332 to make the second permanent magnet 1332 leave the movable seat 1321, so that the movable seat 1321 is in an unlocked state. Therefore, when the first coil 1312 and the first permanent magnet 1322 interact to make the movable seat 1321 move relative to the fixed seat 1311, the second permanent magnet 1332 will not interfere with the movement of the movable seat 1321, so that the movable seat 1321 can drive the lens 11 to stably move relative to the fixed seat 1311 along the optical axis direction of the lens 11 to achieve stable focusing and / or defocusing.

[0081] It should be noted here that in the second working state, the second coil 1331 can also be in an energized state, as long as the magnetic suction force of the second coil 1331 on the second permanent magnet 1332 after energization cannot drive the second permanent magnet 1332 to leave the movable seat 1321, the cooperation between the second permanent magnet 1332 and the movable seat 1321 can be used to lock the position of the movable seat 1321 relative to the fixed seat 1311.

[0082] In some embodiments, in the second working state, the first circuit board 135 makes both the first coil 1312 and the second coil 1331 de-energized. In this way, in the second working state, neither the first coil 1312 nor the second coil 1331 needs to consume electrical energy, which is beneficial to reducing the power consumption of the camera module 10.

[0083] The first coil 1312 and the second coil 1331 are connected in series with each other. Thus, when the first coil 1312 is energized, the second coil 1331 is energized simultaneously; correspondingly, when the first coil 1312 is de-energized, the second coil 1331 is de-energized simultaneously. It can be seen that without a complex control circuit, the energization and de-energization timing of the first coil 1312 and the second coil 1331 is consistent. Then, when it is necessary to use the voice coil motor 13 for focusing and / or defocusing, that is, when the voice coil motor 13 is in the first working state, at this time, the first coil 1312 and the second coil 1331 are energized simultaneously, and the magnetic attraction force of the second coil 1331 acting on the second permanent magnet 1332 will cause the second permanent magnet 1332 to leave the movable seat 1321, so that the interaction between the first coil 1312 and the first permanent magnet 1322 will not be interfered by the second permanent magnet 1332 when the movable seat 1321 moves relative to the fixed seat 1311.

[0084] In some embodiments, the first coil 1312 and the second coil 1331 are wound from the same metal conductor. At this time, it can be considered that the first coil 1312 and the second coil 1331 together form the same coil. Thus, the number of components can be reduced to simplify the structure of the voice coil motor 13.

[0085] The first circuit board 135 can be a flexible circuit board, so as to be able to meet the requirements of curved wiring.

[0086] It should be noted that the first circuit board 135 can be electrically connected to the circuit board provided with the photosensitive chip 12. For example, in some embodiments, the imaging module 10 includes a second circuit board 14, and the photosensitive chip 12 is electrically connected to the second circuit board 14. The first circuit board 135 is electrically connected to the second circuit board 14. In some embodiments, the first circuit board 135 is disposed on the outer wall of the fixed seat 1311, and the first circuit board 135 has a plurality of electrical contact points. The second circuit board 14 is provided with a plurality of corresponding pads. The fixed seat 1311 is connected to the second circuit board 14, and the plurality of electrical contact points on the first circuit board 135 are correspondingly soldered to the plurality of pads on the second circuit board 14. Thus, structures such as the first coil 1312 and the second coil 1331 in the voice coil motor 13 can be electrically connected to the second circuit board 14 through the first circuit board 135, so as to use the second circuit board 14 as a circuit connection component of the entire imaging module 10 to be connected to the electrical connection port on the main board or the secondary board in the electronic device.

[0087] In some embodiments, the second circuit board 135 further includes a connector 15. The connector 15 facilitates connection to the electrical connection port on the main board or the secondary board of the electronic device.

[0088] The photosensitive chip 12 can be connected to the second circuit board 14 through a chip mounting process. In some embodiments, a groove 141 is provided on the second circuit board 14. The camera module 10 includes a bottom plate 16, and the bottom plate 16 is disposed on the back surface of the second circuit board 14 (i.e., in the camera module 10, the side of the circuit board opposite to the lens 11). The photosensitive chip 12 is disposed in the groove 141 and connected to the bottom plate 16. The bottom plate 16 can be made of stainless steel, so as to play a reinforcing role and reduce the risk of the photosensitive chip 12 being broken. The photosensitive chip 12 and the bottom plate 16 can be connected by glue.

[0089] The photosensitive chip 12 can perform imaging when receiving light. The type of the photosensitive chip 12 is not limited herein. The type of the photosensitive chip 12 can include CCD (Charge Coupled Device) elements, CMOS (Complementary Metal Oxide Semiconductor) devices, photodiodes, etc. Classified by color, the photosensitive chip 12 can be a color light sensor, a monochromatic light sensor, an infrared light sensor, a grayscale sensor, etc.

[0090] In some embodiments, the lens 11 can meet the needs of focusing and / or defocusing light in the imaging optical path of the photosensitive chip 12, so that the photosensitive chip 12 can obtain a good imaging effect.

[0091] In some embodiments, the lens 11 includes a plurality of lenses, and the plurality of lenses are linearly arranged along the optical axis direction. Some of the plurality of lenses have both convex surfaces or both concave surfaces, and some lenses have a convex surface on one side and a concave surface on the other side. The surface type of the lens is not limited herein.

[0092] Combined Figure 6 As shown, in some embodiments, the camera module 10 further includes a filter 17. The filter 17 is located in the imaging optical path of the photosensitive chip 12 to play a filtering effect, thereby improving the imaging quality of the photosensitive chip 12.

[0093] The filter 17 can be disposed between the photosensitive chip 12 and the lens 11. For example, the camera module 10 includes a bracket 18, and the bracket 18 is connected to the second circuit board 14. The connection manner between the bracket 18 and the second circuit board 14 includes but is not limited to snap connection, hot melt connection, or connection by glue. The filter 17 is connected to the bracket 18 and is supported by the bracket 18 and disposed on the side of the photosensitive chip 12 facing the lens 11.

[0094] The stator assembly 131 is connected to the second circuit board 14. In some embodiments, the stator assembly 131 may be connected to the second circuit board 14 by glue, so that the voice coil motor 13 mounts the lens 11 on the side of the filter 17 facing away from the photosensitive chip 12.

[0095] In this embodiment, after the lens 11 processes the external light, the light passes through the filter 17 and is incident on the photosensitive chip 12. The photosensitive chip 12 receives the light irradiation and generates an electrical signal, which is then converted into a digital signal through analog-to-digital conversion, thereby realizing digital imaging.

[0096] It should be noted that the filter 17 is not limited to being disposed in the imaging optical path of the photosensitive chip 12 through the bracket 18. For example, in some embodiments, the filter 17 may be attached to the side of the photosensitive chip 12 facing the lens 11, that is to say, the filter 17 is attached to the photosensitive surface of the photosensitive chip 12.

[0097] Combined with Figure 11 As shown, another embodiment of the present application provides an electronic device, including a device body 20 and the imaging module 10 in any of the above embodiments, and the imaging module 10 is connected to the device body 20.

[0098] The device body 20 includes a display screen 21 and a housing 22. The display screen 21 is connected to the housing 22 and jointly encloses a space for installing structures such as the first circuit board 135, the battery, and the imaging module 10.

[0099] In some embodiments, when the imaging module 10 is installed on the device body 20, the photosensitive surface of the photosensitive chip 12 faces the display screen 21 and can receive external light for imaging. In this way, the imaging module 10 can meet the needs of front camera shooting.

[0100] In other embodiments, when the imaging module 10 is installed on the device body 20, the photosensitive surface of the photosensitive chip 12 may face away from the display screen 21 and can receive external light for imaging. In this way, the imaging module 10 can meet the needs of rear camera shooting.

[0101] It should be noted that the electronic device may be a wearable device such as a smart bracelet or a smart watch, or may be a tablet computer, a notebook computer, a smart helmet, a smart glasses, etc., which is not limited herein.

[0102] Combined with Figure 12 , Figure 12This is a circuit module block diagram of the device body 100 of the electronic device provided by the embodiment of the present application. The device body 100 may include a radio frequency (RF) circuit 501, a memory 502 including one or more computer-readable storage media, an input unit 503, a display unit 504, a sensor 505, an audio circuit 506, a wireless fidelity (WiFi) module 507, a processor 508 including one or more processing cores, a power supply 509, and other components. Those skilled in the art can understand that Figure 12 the structure of the device body 100 shown in

[0103] does not limit the device body 100, and may include more or fewer components than shown in the figure, or combine some components, or have different component arrangements. The RF circuit 501 can be used to receive and transmit information, or receive and send signals during a call. Specifically, after receiving the downlink information of the base station, it is handed over to one or more processors 508 for processing; in addition, the data related to the uplink is sent to the base station. Generally, the RF circuit 501 includes, but is not limited to, antennas, at least one amplifier, a tuner, one or more oscillators, a subscriber identity module (SIM) card, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, etc. In addition, the RF circuit 501 can also communicate with the network and other devices through wireless communication. This wireless communication can use any communication standard or protocol, including but not limited to Global System of Mobile communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), etc.

[0104] The memory 502 can be used to store application programs and data. The application programs stored in the memory 502 contain executable code. The application programs can form various functional modules. The processor 508 executes various functional applications and data processing by running the application programs stored in the memory 502. The memory 502 may mainly include a program storage area and a data storage area. Among them, the program storage area can store an operating system, application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the device body 100 (such as audio data, phone book, etc.). In addition, the memory 502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices. Correspondingly, the memory 502 may also include a memory controller to provide access to the memory 502 by the processor 508 and the input unit 503.

[0105] The input unit 503 can be used to receive input digital, character information or user characteristic information (such as fingerprints), and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function controls. Specifically, in a specific embodiment, the input unit 503 may include a touch-sensitive surface and other input devices. The touch-sensitive surface, also known as a touch panel or a touchpad, can collect touch operations of the user on or near it (such as operations of the user using a finger, a stylus or any suitable object or accessory on or near the touch-sensitive surface), and drive the corresponding connection device according to a pre-set program. Optionally, the touch-sensitive surface may include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the touch position of the user and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it to the processor 508, and can receive and execute the commands sent by the processor 508.

[0106] Further, the touch-sensitive surface may cover the liquid crystal panel. After the touch-sensitive surface detects a touch operation on or near it, it is transmitted to the processor 508 to determine the type of touch event. Subsequently, the processor 508 provides a corresponding visual output on the liquid crystal panel according to the type of touch event.

[0107] The display unit 504 can be used to display information input by the user or information provided to the user, as well as various graphical user interfaces of the device body 100. These graphical user interfaces can be composed of graphics, text, icons, videos and any combination thereof.

[0108] Although in Figure 12In this case, the touch-sensitive surface and the liquid crystal panel are implemented as two independent components to perform input and input functions. However, in some embodiments, the touch-sensitive surface and the liquid crystal panel can be integrated to implement input and output functions. It can be understood that the device body 100 may include an input unit 503 and a display unit 504.

[0109] The device body 100 may further include at least one sensor 505, such as a proximity sensor, a motion sensor, and other sensors. Among them, the proximity sensor can turn off the liquid crystal panel and / or the backlight when the device body 100 is moved to the ear. As a type of motion sensor, the gravitational acceleration sensor can detect the magnitude of acceleration in various directions (generally three axes). When stationary, it can detect the magnitude and direction of gravity and can be used in applications for identifying the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition-related functions (such as pedometers, taps), etc. As for other sensors that the device body 100 may also be configured with, such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be elaborated here.

[0110] The audio circuit 506 can provide an audio interface between the user and the device body 100 through a speaker and a microphone. The audio circuit 506 can convert the received audio data into an electrical signal and transmit it to the speaker, which converts it into a sound signal for output. On the other hand, the microphone converts the collected sound signal into an electrical signal, which is received by the audio circuit 506 and then converted into audio data. After the audio data is output to the processor 508 for processing, it is sent through the radio frequency circuit 501 to, for example, another device body 100, or the audio data is output to the memory 502 for further processing. The audio circuit 506 may also include a headphone jack to provide communication between the peripheral headphones and the device body 100.

[0111] Wireless Fidelity (WiFi) belongs to short-range wireless transmission technology. The device body 100 can help users send and receive emails, browse the web, and access streaming media through the WiFi module 507, which provides users with wireless broadband Internet access. Although Figure 12 the WiFi module 507 is shown, it can be understood that it does not belong to an essential component of the device body 100 and can be completely omitted within the scope of not changing the essence of the invention according to needs.

[0112] The processor 508 is the control center of the device body 100, connecting various parts of the entire device body 100 through various interfaces and circuits. By running or executing application programs stored in the memory 502 and invoking data stored in the memory 502, it executes various functions of the device body 100 and processes data, thereby monitoring the device body 100 as a whole. Optionally, the processor 508 may include one or more processing cores; preferably, the processor 508 may integrate an application processor and a modem processor. Among them, the application processor mainly processes the operating system, user interface, application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor may not be integrated into the processor 508 either.

[0113] The device body 100 further includes a power supply 509 for powering each component. Preferably, the power supply 509 can be logically connected to the processor 508 through a power management system, thereby realizing functions such as management of charging, discharging, and power consumption management through the power management system. The power supply 509 may also include any components such as one or more DC or AC power supplies, a recharge system, a power failure detection circuit, a power converter or inverter, and a power status indicator.

[0114] Although Figure 12 not shown in the figure, the device body 100 may further include a Bluetooth module, etc., which will not be elaborated here. In specific implementation, the above-mentioned each module may be implemented as an independent entity, or may be combined arbitrarily and implemented as the same or several entities. For the specific implementation of the above-mentioned each module, reference may be made to the foregoing method embodiments, which will not be elaborated here.

[0115] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0116] The above-mentioned embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A voice coil motor, characterized in that, Comprising: A stator assembly; A rotor assembly, movably connected to the stator assembly, the rotor assembly being used for setting a lens; And A locking assembly, connected to at least one of the stator assembly and the rotor assembly; The voice coil motor has a first working state and a second working state; wherein, in the first working state, the rotor assembly is used for driving the lens to move relative to the stator assembly along the optical axis direction of the lens, and in the second working state, the locking assembly is used for locking the position of the rotor assembly relative to the stator assembly.

2. The voice coil motor according to claim 1, wherein The voice coil motor includes a rolling member, the rolling member is arranged between the rotor assembly and the stator assembly, and the rolling member is used for guiding the rotor assembly to move relative to the stator assembly along the optical axis direction of the lens; And / or, the voice coil motor includes a shaft member, the rotor assembly is slidably connected to the stator assembly through the shaft member, and the shaft member is used for guiding the rotor assembly to move relative to the stator assembly along the optical axis direction of the lens.

3. The voice coil motor according to claim 1 or 2, characterized in that, The stator assembly includes a fixed seat and a first coil, the first coil is arranged on the fixed seat; the rotor assembly further includes a movable seat and a first permanent magnet, the movable seat has a mounting opening for mounting the lens, the first permanent magnet is arranged on the movable seat, and in the first working state, the first coil is energized to interact with the first permanent magnet, so that the movable seat moves relative to the fixed seat along the optical axis direction of the lens.

4. The voice coil motor according to claim 3, wherein The locking assembly includes a second coil, a second permanent magnet and a reset member, the second coil is arranged on the fixed seat, the fixed seat is provided with a mounting hole, the second permanent magnet movably penetrates through the mounting hole and faces the second coil; wherein, the second permanent magnet is configured to have a movement tendency towards the movable seat under the action of the reset member, and the second coil is configured to: in the first working state, the second coil is energized to adsorb the second permanent magnet, so that the second permanent magnet keeps a distance from the movable seat; in the second working state, the second permanent magnet moves to cooperate with the movable seat under the action of the reset member.

5. The voice coil motor according to claim 4, wherein, The reset member includes a third permanent magnet, the third permanent magnet is arranged on the movable seat and faces the second permanent magnet, and in the second working state, the third permanent magnet generates an attractive force on the second permanent magnet to drive the second permanent magnet to move to cooperate with the movable seat; And / or, the reset member includes an elastic member, the elastic member is arranged on the fixed seat, and in the second working state, the elastic member drives the second permanent magnet to cooperate with the movable seat.

6. The voice coil motor according to claim 5, wherein The movable seat is provided with a locking groove, and in the second working state, one end of the second permanent magnet cooperates with the locking groove; in the first working state, the second coil is energized and adsorbs the second permanent magnet, so that the second permanent magnet withdraws from the locking groove.

7. The voice coil motor according to claim 4, characterized in that, The voice coil motor further includes a first circuit board. Both the first coil and the second coil are electrically connected to the first circuit board. The first circuit board is configured to: the first circuit board can control the voice coil motor to switch between the first working state and the second working state, and in the first working state, the first circuit board causes both the first coil and the second coil to be energized.

8. The voice coil motor according to claim 7, wherein, In the second working state, the first circuit board causes both the first coil and the second coil to be de-energized.

9. The voice coil motor according to claim 7, wherein The first coil and the second coil are connected in series with each other.

10. The voice coil motor according to claim 9, wherein, The first coil and the second coil are wound from the same metal conductor.

11. An imaging module, characterized in that, It includes a lens, an image sensor chip, and the voice coil motor according to any one of claims 1-10. The lens is disposed on the light-sensitive side of the image sensor chip along its optical axis and is connected to the mover assembly of the voice coil motor.

12. An electronic device, characterized in that, It includes a device body and the imaging module according to claim 11. The imaging module is connected to the device body.

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