CN112713744B

CN112713744B - Camera module and electronic equipment

Info

Publication number: CN112713744B
Application number: CN202011542428.0A
Authority: CN
Inventors: 王敏
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2022-01-28
Anticipated expiration: 2040-12-23
Also published as: CN112713744A

Abstract

The embodiment of the application discloses camera module and electronic equipment. The camera module includes: a module support comprising a carrier and a magnetic assembly; the lens assembly is arranged in the module bracket and comprises a lens group and a coil, the coil is arranged around the lens group, the axis of the coil is parallel to the optical axis of the lens group, the magnetic assemblies are arranged on two sides of the coil, and a magnetic field generated by the magnetic assemblies penetrates through the plane of the coil; under the condition that the camera module moves, the coil moves along the direction of the optical axis, and voltage is generated in the coil. The camera module of this application embodiment drives the in-process that the coil removed, produces voltage in the coil, is in the closure state in the coil, can produce the electric current in the coil, and then charges for camera module self, has simplified the mode of charging of camera module.

Description

Camera module and electronic equipment

Technical Field

The embodiment of the application relates to the technical field of cameras, in particular to a camera module and electronic equipment.

Background

At present, two charging modes of a camera module include two charging modes; one charging mode is: the camera module is an independent module, independent charging equipment is arranged in the camera module, for example, a charging interface is arranged in the camera module, and the camera module is charged after the charging interface is communicated with an external power supply; this charging mode has limitations of the charging environment.

Another charging module is: the camera module is integrated in the electronic equipment and is charged through charging equipment inside the electronic equipment; the charging mode occupies the capacity of the electronic equipment charging equipment, and the service time of the electronic equipment is shortened.

Disclosure of Invention

An object of the embodiment of the application is to provide a new technical scheme of camera module and electronic equipment to solve the technical problem that present camera module charging limitation is big.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a camera module. The camera module includes:

a module support comprising a carrier and a magnetic assembly;

the lens assembly is arranged in the module bracket and comprises a lens group and a coil, the coil is arranged around the lens group, the axis of the coil is parallel to the optical axis of the lens group, the magnetic assemblies are arranged on two sides of the coil, and a magnetic field generated by the magnetic assemblies penetrates through the plane of the coil;

under the condition that the camera module moves, the coil moves along the direction of the optical axis, and voltage is generated in the coil.

In a second aspect, the present embodiment provides an electronic device, including a housing and the camera module according to the first aspect;

the camera module is detachably arranged in the shell.

In the embodiment of the application, a camera module is provided, wherein magnetic components in the camera module are arranged on two sides of a coil, and a magnetic field generated by the magnetic components penetrates through the plane of the coil; under the condition that the camera module moves, the coil moves along the direction of the optical axis, and voltage is generated in the coil. The camera module of the embodiment of the application drives the in-process that the coil removed, produces voltage in the coil, is in the closed condition in the coil, can produce circulating current in the coil, and then charges for camera module self, has simplified the mode of charging of camera module.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic structural diagram of a camera module according to the present application.

Fig. 2 is an electromagnetic structural schematic diagram of the driving device of the camera module according to the present application.

Fig. 3 is a schematic diagram of a charging circuit according to the present application.

Fig. 4 is a schematic structural diagram of another embodiment of the camera module according to the present application.

Description of reference numerals:

1-module holder, 11-carrier, 12-magnetic assembly, 13-magnetic part, 111-first spring, 112-second spring;

2-lens assembly, 21-lens group, 22-coil.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

According to an embodiment of the present application, referring to fig. 1 to 4, a camera module is provided. The camera module includes: a module holder 1 and a lens assembly 2.

The module holder 1 comprises a carrier 11 and a magnet assembly 12.

The lens assembly 2 is arranged in the module bracket 1, the lens assembly 2 comprises a lens group 21 and a coil 22, the coil 22 is arranged around the lens group 21, the axis of the coil 22 is parallel to the optical axis of the lens group 21, the magnetic assembly 12 is arranged on two sides of the coil 22, and the magnetic field generated by the magnetic assembly 21 passes through the plane of the coil 22;

when the camera module moves, the coil 22 moves in the optical axis direction, and a voltage is generated in the coil 22.

Specifically, the lens assembly 2 is disposed within the module holder 1, and the lens assembly 2 is movable within the module holder 1. The lens assembly 2 includes a lens group 21 and a coil 22, so that the lens group 21 and the coil 22 can move within the module holder 1.

The coil 22 of this example is disposed around the periphery of the lens group 21, so that when the lens group 21 moves up and down along its optical axis under an external force, the coil 22 around the periphery of the lens group 21 can be driven to move up and down along its axis. Wherein the external force may include the movement of the coil 22 of the camera module when the camera module is held by a user in a moving state. In addition, when the camera module is applied to an electronic apparatus, the vibration of the electronic apparatus can also drive the coil 22 to move in the axial direction thereof.

In this example, the magnet assembly 12 is disposed in the circumferential direction outside the coil 22, that is, the magnet assembly 12 is disposed opposite to the coil 22, and the magnetic field generated by the magnet assembly 21 can pass through the plane of the coil 22, which can be understood as follows: the magnetic field generated by the magnet assembly 12 lies in a plane perpendicular to the direction of movement of the coil 22.

For example, the magnet assembly 12 may include a plurality of permanent magnets that are each disposed opposite the coil 22. The magnet assembly 12 generates a magnetic field within which the coil 22 is capable of moving during movement to cut the magnetic flux lines such that a change in the magnetic flux through the coil 22 causes a voltage to be generated in the coil 22.

In the process that the camera module drives the coil to move, voltage is generated in the coil and is in a closed state in the coil, for example, loads are connected to two ends of the coil, the coil and the loads form a closed electric loop, and circulating current can be generated in the coil so as to charge the loads. Work as during the load is the battery module of camera module, battery module and coil constitute closed circuit, and the coil can charge for the battery module, has realized that the camera module charges for the battery module of self through the coil of self, realizes charging for the camera module at any time, compares in prior art, and this application embodiment has broken the limitation of camera module charge mode, has simplified the charge mode of camera module.

Optionally, the camera module comprises a battery module, the coil 22 is electrically connected to the battery module through a charging circuit, and the coil 22 charges the battery module.

Because the coil 22 can generate voltage in the movement process, after the coil 22 and the battery module are connected through the charging circuit to form a closed loop, the coil 22 can generate current; when the coil 22 generates current, the current is processed by the charging circuit, and the processed current is transmitted to the battery module of the camera module to charge the battery module.

The present example uses the magnetic assembly 12 and the coil 22 of the camera module to charge the battery module of the camera module. Specifically, the mechanical energy that the coil motion produced under the exogenic action converts the electric energy into and stores to give the electric energy of storage the battery module charges, and its self of this embodiment camera module can charge for the battery module that sets up in its inside, has simplified the charge mode of camera module.

Compared with the charging mode of the independent camera module in the prior art, the charging environment of the camera module is not limited in the embodiment, for example, the camera module does not need an external power supply to charge the camera module during charging; the camera module of this example charges the battery module inside the camera module using its own coil.

Compared with the charging mode that the camera module in the prior art is integrated on the electronic equipment, when the camera module is arranged on the electronic equipment, the charging equipment of the electronic equipment is not needed to provide electric energy for the camera module, so that the charging equipment on the electronic equipment can provide electric energy for other power utilization modules on the electronic equipment for a long time, and the service life of the electronic equipment is prolonged.

Alternatively, referring to fig. 1-2, the magnet assembly 12 encloses a ring structure, and the coil 22 is disposed inside the ring structure.

The arrangement of the magnet assembly 12 and the coil 22 of the present embodiment makes the structure of the camera module more compact, and the volume of the camera module is lighter and smaller. When the camera module is applied to the electronic equipment, the occupied internal space of the electronic equipment is small, so that more other functional modules can be borne in the electronic equipment, and the functions of the electronic equipment are enriched.

Alternatively, referring to fig. 1-2, the inner surface of the magnet assembly 12 is an N pole, and the outer surface is an S pole; the magnet assembly 12 generates a magnetic field perpendicular to the paper into which the coil 22 moves along its axis up to cut the magnetic flux lines.

Specifically, the coil 22 performs a cutting magnetic induction line motion along the axis thereof, a voltage difference is formed on the coil 22, and when the coil 22 is connected with the battery module to form a closed loop, a current is generated in the coil 22.

As shown in fig. 2, b indicates the direction of the magnetic field, a indicates the direction of the current generated in the coil 22, and a counterclockwise current is generated in the coil 22. The magnetic assembly 12 is a permanent magnet. Wherein the inner surface is defined as the surface proximal to the coil 22 and the outer surface is defined as the surface distal to the coil 22.

When the inner surface of the magnetic assembly 12 is an N pole and the outer surface is an S pole, the direction of the magnetic field on the same surface of the magnetic assembly 12 is inward in the direction perpendicular to the coil 22, the coil 22 moves upward along the axial direction thereof, and according to the right-hand rule, the coil 22 generates a current in the counterclockwise direction; wherein in electromagnetism, the right-hand rule is defined as: the right hand is stretched, so that the thumb is perpendicular to the other four fingers and is in the same plane with the palm; the magnetic induction line enters from the palm of the hand, and the thumb points to the moving direction of the coil, and the direction pointed by the four fingers is the direction of current.

Similarly, when coil 22 is moved downward along its axis, coil 22 generates a clockwise current according to the right hand rule.

Optionally, in another embodiment, the inner surface of the magnet assembly 12 is an S pole, and the outer surface is an N pole; the magnet assembly 12 generates a magnetic field that is directed out of the page, the coil 22 moves downward along its axis, and the coil 22 generates a clockwise current.

The direction of the current generated by the magnet coil passing through the magnet induction line is related to the movement direction of the coil, and the polarity of the inner surface and the polarity of the outer surface of the magnet assembly 12 are not particularly limited in this example, but when the magnet assembly 12 comprises a plurality of magnet assemblies, the polarities of the inner surfaces of the plurality of magnet assemblies are the same, and the polarities of the outer surfaces of the plurality of magnet assemblies are the same, so that the directions of the magnetic fields generated by the magnet assemblies 12 are the same, the magnetic flux passing through the interior of the coil is improved, and the current flowing through the coil is increased.

Alternative embodiments may increase the current flowing through the coil by changing the number of turns of the coil and how tightly the coil is wound. For example, the number of turns of the coil ranges from 200 turns to 500 turns. The number of turns of the coil to be wound, the tightness of the coil to be wound and the length of the coil are not particularly limited in this example as long as the battery module can be charged.

Optionally, the lens assembly 2 is fixed on the carrier 11, the carrier 11 has a first end surface and a second end surface which are oppositely arranged, the first end surface is provided with the first spring 111, and the second end surface is provided with the second spring 112.

For example, the lens group 21 is fixed inside the carrier 11, and the carrier 11 is movable in the optical axis direction of the lens group 21 by an external force. The carrier 11 has an outer circumference on which a projection is provided, on which the coil 22 is wound. For example, the convex portion is provided along the circumferential direction of the carrier 11, and the coil 22 is wound on the convex portion and provided on the outer circumferential side of the carrier 11. This example improves the connection strength of the coil 22 provided on the carrier 11; under the action of external force, the coil 22 can avoid falling off when the coil cuts the magnetic induction lines.

The first end-face of this example is defined as: the lens group 21 is arranged on the carrier 11, and when the lens group 21 moves upwards along the optical axis, the lens group moves towards the first end face;

the second end face is defined as: the lens group 21 is disposed on the carrier 11, and when the lens group 21 moves downward along the optical axis thereof, the lens group moves closer to the second end face.

For example, when the camera module is in an operating state, the battery module of the camera module supplies current to the coil 22 in a specified direction, according to fleming's left-hand rule, when the coil is in a magnetic field, the coil 22 generates lorentz force, the carrier 11 fixedly connected with the coil 22 moves under the action of the lorentz force, at this time, elastic force for limiting the movement of the carrier 11 is generated between the first end surface of the carrier 11 and the first spring 111 and between the second end surface of the carrier 11 and the second spring 112, and when the lorentz force is balanced with the elastic force of the first spring and the second spring, the carrier 11 stops moving, that is, the camera module completes focusing of focal length.

Optionally, referring to fig. 4, the inner surface of the coil 22 is provided with a magnetic part 13, the magnetic part 13 is close to the magnetic pole of the coil 22, and the coil 22 is located between the magnetic assembly 12 and the magnetic part 13, opposite to the magnetic pole of the magnetic assembly 12 close to the coil 22.

In the embodiment of the present application, the magnetic poles of second magnetic assembly 106 adjacent the inner surface of the coil are opposite the magnetic poles of magnetic assembly 12 adjacent the outer surface of the coil. For example, the magnetic pole of the magnetic component 12 close to the outer surface of the coil 22 is an N pole, and the magnetic pole of the magnetic component 13 close to the inner surface of the coil 22 is an S pole; the coil 22 is positioned between the S pole and the N pole, and the magnetic field intensity generated under the combined action of the magnetic assembly 12 and the magnetic component 13 is enhanced; from E ═ BLV, it can be seen that, at the same speed and the same coil length, the stronger the magnetic field strength B, the greater the induced electromotive force E generated; therefore, the current generated by the coil is increased in the present example, and when the coil is electrically connected with the battery module through the charging circuit, the larger the current charged into the battery module by the coil is, the faster the charging speed is.

In a specific embodiment, for example, the coil 22 is wound on the outer periphery of the carrier 11, and in this example, the magnetic part 13 is further disposed on the outer periphery of the carrier 11, when the magnetic part 13 is fixed on the carrier 11, the coil 22 is wound on the outer side of the magnetic part 13, that is, the magnetic part 13 is disposed on the inner surface of the coil 22, and the magnetic assembly 12 is disposed on the outer surface of the coil 22; where the inner surface in this example is defined as: a surface near the outer peripheral side of the carrier 11; the outer surface is defined as: the surface away from the outer circumferential side of the carrier 11. In this example, by adding the magnetic member 13, the magnetic field intensity generated by the magnetic assembly 12 and the magnetic member 13 is increased, the current generated by the coil 22 in the closed circuit is increased, and when the coil and the battery module are electrically connected through the charging circuit, the charging speed is increased as the current charged into the battery module by the coil is increased.

Optionally, referring to fig. 3, the charging circuit includes a control switch K, and when the control switch K is in an off state, a current is generated in the coil 22 to charge the battery module; for example, when the control switch K is in an off state, the battery module cannot energize the coil 22, and at this time, the camera module is in an off state, and the coil 22 performs cutting magnetic induction line movement under the action of external force, so that the battery module can be charged.

When the control switch K is in a closed state, the battery module supplies power to the coil 22. When the control switch K is in a closed state, the battery module and the coil 22 can form a conductive closed loop, the battery module energizes the coil 22, and the coil is in a magnetic field and can generate a lorentz force to drive the lens group 21 to move.

Alternatively, referring to fig. 3, the charging circuit includes a full-bridge rectifying circuit and a capacitor C;

when control switch K is in the off-state, full-bridge rectifier circuit and electric capacity are in operating condition, coil 22 with full-bridge rectifier circuit connects in series, electric capacity C with the battery module is parallelly connected, the parallel circuit that electric capacity and battery module constitute with full-bridge rectifier circuit connects in series.

The full-bridge rectifier circuit of the present example is used to rectify the ac power in the coil 22 into dc power, and supply and store the dc power to the battery module. The diode D1-diode D4 form a full bridge rectifier circuit, the diodes have a unidirectional conductivity, the alternating current is generated by the movement of the coil 22 in the magnetic field to cut the magnetic induction lines, and the coil 22 generates a current in the closed circuit loop.

When the camera module is in an inoperative state (i.e., the battery module does not energize the coil), the control switch K is turned off, and the coil 22 makes a magnetic induction line cutting motion in a magnetic field under the action of an external force (e.g., when a user carries the camera module in a moving state), because the direction of the current generated by the coil is related to the moving direction of the coil, when the moving directions of the coils are different, the directions of the currents generated by the coil are different; after full-bridge rectification and capacitance filtering, the direct current with the same direction can be output, and therefore the battery module is charged.

Alternatively, referring to fig. 3, the charging circuit includes a voltage regulator 3;

when the control switch is in a closed state, the voltage stabilizer 3, the coil 22, the control switch K and the battery module are connected in series to form a conductive closed loop, and the battery module supplies power to the coil 22. For example, the voltage stabilizer 3 is turned on to be in an operating state, the control switch K is turned on, at this time, due to the unidirectional conductivity of the diode, the power module, the capacitor C, the full-bridge rectification circuit and the coil are not conducted, the battery module energizes the coil, according to fleming's left-hand rule, when the energized coil is in a magnetic field, the coil 22 generates lorentz force, the carrier 11 fixedly connected with the coil moves under the action of the lorentz force, at this time, elastic force for limiting the movement of the carrier is generated between the first end surface of the carrier 11 and the first spring 111 and between the second end surface of the carrier 11 and the second spring 112, and when the lorentz force and the elastic force of the springs are balanced, the carrier stops moving, namely, the camera module finishes focusing of focal length.

According to another aspect of the present application, an electronic device is provided. For example, the electronic device may be a watch, a mobile phone, a tablet, a computer, etc. The electronic equipment comprises a shell and the camera module;

the camera module is detachably arranged in the shell.

When the camera module is applied to the electronic equipment, when the camera module is located in the electronic equipment and is in an out-of-operation state, the charging equipment which does not need the electronic equipment provides electric energy for the camera module, so that the charging equipment on the electronic equipment can provide electric energy for other power utilization modules on the electronic equipment for a long time, and the service life of the electronic equipment is prolonged.

When the camera module is detached from the inside of the electronic equipment but is in an inoperative state, the camera module charges the battery module in the camera module by utilizing the coil of the camera module, and the charging mode of the camera module is simplified.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a camera module which characterized in that, camera module includes:

a module support (1), the module support (1) comprising a carrier (11) and a magnetic assembly (12);

the lens assembly (2) is arranged in the module bracket (1), the lens assembly (2) comprises a lens group (21) and a coil (22), the coil (22) is arranged around the lens group (21), the axis of the coil (22) is parallel to the optical axis of the lens group (21), the magnetic assembly (12) is arranged on two sides of the coil (22), and a magnetic field generated by the magnetic assembly (12) passes through the plane of the coil (22);

under the condition of the motion of the camera module, the coil (22) moves along the optical axis direction, and voltage is generated in the coil (22);

the camera module comprises a battery module, the coil (22) is electrically connected with the battery module through a charging circuit, and the coil (22) charges the battery module.

2. The camera module according to claim 1, wherein the magnetic assembly (12) encloses a ring structure, the lens assembly (2) being arranged inside the ring structure.

3. The camera module of claim 1, wherein the magnet assembly (12) has an inner surface with an N pole and an outer surface with an S pole, the magnet assembly (12) generates a magnetic field perpendicular to the paper surface, and the coil (22) moves along its axis upward to cut the magnetic induction lines.

4. The camera module according to claim 1, wherein the lens assembly (2) is fixed on the carrier (11), the carrier (11) having a first end face and a second end face which are oppositely arranged, a first spring (111) being arranged on the first end face, and a second spring (112) being arranged on the second end face.

5. The camera module according to claim 1, characterized in that the inner surface of the coil (22) is provided with a magnetic component (13), the magnetic component (13) being close to a magnetic pole of the coil (22) opposite to the magnetic pole of the magnetic component (12) close to the coil (22), the coil (22) being located between the magnetic component (12) and the magnetic component (13).

6. The camera module according to claim 1, wherein the charging circuit comprises a control switch, and when the control switch is in an off state, a current is generated in the coil (22) to charge the battery module;

when the control switch is in a closed state, the battery module supplies power to the coil (22).

7. The camera module according to claim 6, wherein the charging circuit comprises a full bridge rectifying circuit and a capacitor;

when the control switch is in a disconnected state, the full-bridge rectifying circuit and the capacitor are in a working state, the coil (22) is connected with the full-bridge rectifying circuit in series, the capacitor is connected with the battery module in parallel, and a parallel circuit formed by the capacitor and the battery module is connected with the full-bridge rectifying circuit in series.

8. The camera module of claim 7, wherein the charging circuit comprises a voltage regulator;

when the control switch is in a closed state, the voltage stabilizer, the coil (22), the control switch and the battery module are connected in series to form a conductive closed loop, and the battery module supplies power to the coil (22).

9. An electronic device, characterized in that the electronic device comprises a housing and a camera module according to any one of claims 1-8;

the camera module is detachably arranged in the shell.