CN115190234A - Motor, camera module and electronic equipment - Google Patents
Motor, camera module and electronic equipment Download PDFInfo
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- CN115190234A CN115190234A CN202211092232.5A CN202211092232A CN115190234A CN 115190234 A CN115190234 A CN 115190234A CN 202211092232 A CN202211092232 A CN 202211092232A CN 115190234 A CN115190234 A CN 115190234A
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Abstract
The application provides a motor, a camera module and electronic equipment, wherein the motor comprises a shell, a first magnetic body, a second magnetic body, a first coil, a second coil, a first electrode pin, a second electrode pin and a carrier; the carrier is used for fixing the lens; the first magnetic body and the second magnetic body are fixed on the inner wall of the shell; the first coil is positioned between the carrier and the first magnetic body; the second coil is positioned between the carrier and the second magnetic body; the first end of the first coil and the third end of the second coil are electrically connected with a first electrode pin, and the second end of the first coil and the fourth end of the third coil are electrically connected with a second electrode pin; the first electrode pin is used for being coupled to a positive power supply electrode and the second electrode pin is used for being coupled to a negative power supply electrode, or the first electrode pin is used for being coupled to the negative power supply electrode and the second electrode pin is used for being coupled to the positive power supply electrode. This application can increase the size of the electric current of first coil and second coil of flowing through, and then increase motor thrust to solve the not enough problem of thrust.
Description
Technical Field
The embodiment of the application relates to the technical field of lens driving, in particular to a motor, a camera module and electronic equipment.
Background
With the continuous development and wide application of terminal devices, the auto-focusing function is increasingly applied to terminal devices such as smart phones and tablet computers. The terminal equipment with the automatic focusing function can automatically focus a shot object during shooting, so that the shot object can be clearly imaged.
A camera module of a terminal device with an auto-focus function generally comprises a lens, an image sensor (image sensor) and a voice coil motor. The auto-focusing function of the camera module is generally realized by a voice coil motor. The voice coil motor comprises a rotor part and a stator part, wherein the rotor part is fixed with a lens, and the rotor part can move relative to the stator part in the optical axis direction. The image sensor is fixed on one side of the voice coil motor far away from the lens. The lens can move along with the mover part, so that the imaging focus of the lens on a shot object can be positioned on the image sensor. Thus, the terminal equipment can realize clear imaging on the shot object. Generally, the mover portion moves relative to the stator portion in a manner that the stator portion is a magnet, the mover portion is an energizing coil, and after the energizing coil is energized, a magnetic field of the magnet can generate lorentz force, that is, thrust of the mover portion for pushing the lens, on moving charges in the energizing coil.
The magnitude of the lorentz force is related to the magnitude of the current in the energized coil, the length of the energized coil and other factors, so that for some voice coil motors, if the current of the energized coil is too low, the lorentz force received by the mover part is too small, namely the motor thrust of the voice coil motor is too small, and the accuracy of terminal equipment automatic focusing is influenced.
Disclosure of Invention
The embodiment of the application provides a motor, a camera module and electronic equipment to solve the problem that traditional motor thrust is not enough.
In a first aspect, an embodiment of the present application provides a motor, including: the first magnetic body, the second magnetic body, the first coil, the second coil, the first electrode pin, the second electrode pin and the carrier are arranged in the cavity of the shell; the carrier is used for fixing the lens; the first magnetic body and the second magnetic body are fixed on the inner wall of the shell and symmetrically distributed on two sides of the carrier by taking the optical axis of the lens as the center; the magnetic pole directions of the first magnetic body and the second magnetic body are the same and are parallel to the optical axis of the lens; the first coil is positioned between the carrier and the first magnetic body and is fixed on the carrier; the second coil is positioned between the carrier and the second magnetic body and is fixed on the carrier; the first end of the first coil is electrically connected with the first electrode pin, and the second end of the first coil is electrically connected with the second electrode pin; the third end of the second coil is electrically connected with the first electrode pin, and the fourth end of the second coil is electrically connected with the second electrode pin; the first electrode pin is used for being coupled to a positive power supply electrode and the second electrode pin is used for being coupled to a negative power supply electrode, or the first electrode pin is used for being coupled to the negative power supply electrode and the second electrode pin is used for being coupled to the positive power supply electrode.
The motor that this application embodiment provided can increase the current value size of flowing through first coil and second coil under the unchangeable circumstances of holding supply voltage for the lorentz force that first coil and second coil received can increase, and is further, and motor thrust can increase, like this, can solve the not enough problem of current motor structure thrust
In one implementation, the method further comprises: a first lower spring plate and a second lower spring plate; the first lower reed is positioned on one side of the first coil and the second coil, and the second lower reed is positioned on the other side of the first coil and the second coil; the first lower reed comprises a first fixed end close to the first end of the first coil, and the first electrode pin is fixed at the first fixed end and is electrically connected with the first lower reed; the second lower reed comprises a second fixed end close to the third end of the second coil, and the second electrode pin is fixed at the second fixed end and is electrically connected with the second lower reed.
In one implementation, the method further comprises: the first binding post, the second binding post, the third binding post and the fourth binding post; the first binding post and the second binding post are positioned outside the carrier, fixed on the top surface of the first lower reed and electrically connected with the first lower reed; the first binding post is close to the first end of the first coil, and the second binding post is close to the third end of the second coil; the third binding post and the fourth binding post are positioned outside the carrier, fixed on the top surface of the second lower spring and electrically connected with the second lower spring; the third binding post is close to the second end of the first coil, and the fourth binding post is close to the fourth end of the second coil.
In one implementation, the method further comprises: a first conductive line, a second conductive line, a third conductive line, and a fourth conductive line; one end of a first lead is electrically connected with the first end of the first coil, and the other end of the first lead is electrically connected with the first binding post; one end of a second lead is electrically connected with the third end of the second coil, and the other end of the second lead is electrically connected with a second wiring terminal; one end of a third lead is electrically connected with the second end of the first coil, and the other end of the third lead is electrically connected with a third wiring terminal; one end of a fourth wire is electrically connected with the fourth end of the second coil, and the other end of the fourth wire is electrically connected with a fourth wiring terminal.
In this way, the first end of the first coil may be electrically connected to the first electrode pin through the first wire, the first terminal, and the first lower reed, so as to be coupled to the positive electrode or the negative electrode of the power supply, and the second end of the first coil may be electrically connected to the second electrode pin through the third wire, the third terminal, and the second lower reed, so as to be coupled to the negative electrode or the positive electrode of the power supply. The third end of the second coil can be electrically connected with the first electrode pin through a second lead, a second wiring terminal and a first lower reed so as to be coupled to the positive pole or the negative pole of the power supply, and the fourth end of the second coil can be electrically connected with the second electrode pin through a fourth lead and a second lower reed so as to be coupled to the negative pole or the positive pole of the power supply.
In one implementation, the method further comprises: a base; the shell is arranged on the base; the base is positioned at the bottom of the carrier, and the first lower spring plate and the second lower spring plate are positioned between the base and the carrier.
In one implementation, the first lower spring plate further comprises: the third fixed end is close to the third end of the second coil, and the first deformation area, the fifth fixed end, the first connecting body, the sixth fixed end and the second deformation area are positioned between the first fixed end and the third fixed end and are sequentially connected along the direction from the first fixed end to the third fixed end; the first fixed end and the third fixed end are fixed on the top surface of the base, and the fifth fixed end and the sixth fixed end are fixed on the bottom surface of the carrier; the first deformation area and the second deformation area are used for deforming when stressed and restoring deformation when the stress disappears.
Therefore, the first deformation area and the second deformation area can deform under stress, so that the first coil, the second coil and the carrier can move relative to the base, and when the stress disappears, the first deformation area and the second deformation area can guide the first coil, the second coil and the carrier to reset.
In one implementation, the second lower spring plate further comprises: the fourth deformation area is positioned between the second fixing end and the fourth fixing end and is sequentially connected with the third deformation area, the seventh fixing end, the second connecting body, the eighth fixing end and the fourth deformation area along the direction from the second fixing end to the fourth fixing end; the second fixed end and the fourth fixed end are fixed on the top surface of the base, and the seventh fixed end and the eighth fixed end are fixed on the bottom surface of the carrier; the third deformation area and the fourth deformation area are used for deforming when stressed and restoring deformation when the stress disappears.
Therefore, the third deformation area and the fourth deformation area can deform under stress, so that the first coil, the second coil and the carrier can move relative to the base, and when the stress disappears, the third deformation area and the fourth deformation area can guide the first coil, the second coil and the carrier to reset.
In one implementation, the method further comprises: a frame and an upper spring; wherein, the frame is positioned on the top surface of the carrier and is fixedly connected with the bottom surface of the shell; the upper reed is positioned between the frame and the carrier and comprises a plurality of first connecting positions and a plurality of second connecting positions, and the first connecting positions are distributed on the outer sides of the second connecting positions in a one-to-one correspondence manner; a fifth deformation area is connected between the first connecting position and the second connecting position corresponding to each pair, and a third connecting body is connected between the second connecting positions adjacent to each pair; the plurality of first connecting positions are fixedly connected with the frame; the plurality of second connecting parts are fixedly connected with the carrier; the fifth deformation area is used for deformation when stressed and restoring deformation when the stress disappears.
Like this, can take place deformation when the atress in the fifth deformation zone for first coil, second coil and carrier can take place to move relative the base, and when the power disappeared, the fifth deformation zone can guide first coil, second coil and carrier to reset.
In one implementation, the first, second, third and fourth fixed ends respectively correspond to one of the plurality of first junctions; the first fixed end and the first connecting position corresponding to the first fixed end are superposed in the projection of the optical axis direction; the second fixed end is superposed with the projection of the corresponding first connecting position in the direction of the optical axis; the third fixed end is superposed with the projection of the corresponding first connecting position in the direction of the optical axis; the projection of the fourth fixed end and the corresponding first connecting position in the optical axis direction are superposed; the fifth fixed end, the sixth fixed end, the seventh fixed end and the eighth fixed end respectively correspond to one of the second junctions; the fifth fixed end is superposed with the projection of the corresponding second joint in the optical axis direction, the sixth fixed end is superposed with the projection of the corresponding second joint in the optical axis direction, the seventh fixed end is superposed with the projection of the corresponding second joint in the optical axis direction, and the eighth fixed end is superposed with the projection of the corresponding second joint in the optical axis direction.
Therefore, the upper spring plate, the first lower spring plate and the second lower spring plate can respectively play a role in limiting the motion direction of the carrier from the top surface and the bottom surface of the carrier, so that the carrier only moves in the optical axis direction and does not move in the direction vertical to the optical axis or in other directions, and the carrier can be prevented from deviating.
In an implementation manner, in the direction along the optical axis of the lens, the bottom of the first magnetic body is an N pole, the top of the first magnetic body is an S pole, the bottom of the second magnetic body is an N pole, and the top of the second magnetic body is an S pole; the first electrode pin is an anode pin, and the second electrode pin is a cathode pin; or, in the direction along the optical axis of the lens, the bottom of the first magnetic body is an S pole, the top of the first magnetic body is an N pole, the bottom of the second magnetic body is an S pole, and the top of the second magnetic body is an N pole; the first electrode pin is a negative electrode pin, and the second electrode pin is a positive electrode pin.
Therefore, the first coil and the second coil can drive the carrier and the lens to move towards the light incidence side close to the lens.
In a second aspect, an embodiment of the present application further provides a camera module, where the camera module includes: a lens, an image sensor, and a motor as in the first aspect and its various implementations described above; the lens is fixed on the carrier; the image sensor is located on the light-emitting side of the lens.
The camera module that this application embodiment provided can be under the unchangeable circumstances of holding supply voltage, and the current value size of first coil and second coil is flowed through in the increase for the lorentz force that first coil and second coil received can increase, and is further, and motor thrust can increase, like this, can solve the not enough problem of current motor structure thrust
In a third aspect, an embodiment of the present application further provides an electronic device, including: one or more camera modules; wherein the at least one camera module is the camera module of the second aspect described above, and/or the at least one camera module comprises a motor as described above in the first aspect and its various implementations.
Drawings
Fig. 1 is a schematic structural diagram of an AF mobile phone with automatic focusing function;
FIG. 2 is a schematic diagram showing a comparison between images collected before and after auto-focusing of an AF mobile phone;
FIG. 3 is a schematic diagram illustrating a positional relationship among a voice coil motor, a lens and an image sensor;
fig. 4 is a schematic structural view of a conventional voice coil motor;
FIG. 5 is a schematic diagram of another conventional voice coil motor;
fig. 6 is a schematic structural diagram of a first partial structure of a motor according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a circuit connection relationship of a motor according to an embodiment of the present application;
FIG. 8 is a schematic diagram of the circuit connection of two coils in series;
fig. 9 is a schematic structural diagram of a second partial structure of a motor according to an embodiment of the present application;
fig. 10 is a first overall structural schematic diagram of a motor provided in the embodiment of the present application;
fig. 11 is a second overall structural schematic diagram of a motor provided in the embodiment of the present application;
fig. 12 is a schematic view of a disassembled structure of a motor provided in an embodiment of the present application;
FIG. 13 is a schematic diagram of the directions of Lorentz force provided by an embodiment of the present application;
fig. 14 is a schematic structural diagram of a third partial structure of a motor according to an embodiment of the present application;
fig. 15 is a schematic structural diagram of a fourth partial structure of a motor according to an embodiment of the present application;
FIG. 16 is a schematic structural diagram of an upper spring plate, a first lower spring plate and a second lower spring plate according to an embodiment of the present application;
figure 17 is a schematic view of the connection between the lower spring and the base according to the embodiment of the present application;
FIG. 18 is a schematic structural diagram of a damping rubber provided in an embodiment of the present application;
fig. 19 is a schematic structural diagram of a first coil, a second coil and a carrier according to an embodiment of the present application;
fig. 20 is a schematic diagram illustrating a positional relationship between the first coil and the second carrier according to an embodiment of the present application;
fig. 21 is a schematic structural diagram of a fifth partial structure of a motor according to an embodiment of the present application;
fig. 22 is a schematic view of a camera module according to an embodiment of the present application.
Detailed Description
The terms "first", "second" and "third", etc. in the description and claims of this application and the description of the drawings are used for distinguishing between different objects and not for limiting a particular order.
In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
The terminology used in the description of the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application, which will be described in detail below with reference to the accompanying drawings.
In order to facilitate the technical solutions of the embodiments of the present application to be understood by the skilled person, the technical terms related to the embodiments of the present application are explained below.
Auto Focus (AF): when a camera is used for shooting an object, light reflection occurs on the surface of the shot object, the light reflected on the surface of the shot object enters a camera lens and then can be received by an image sensor positioned behind the camera lens, then the object distance of the shot object can be obtained through processing calculation of a processor, and then the camera can automatically move the lens according to the object distance to finish focusing so as to shoot the shot object.
With the continuous development and wide application of terminal devices, the auto-focusing function is increasingly applied to terminal devices such as smart phones and tablet computers. The terminal equipment with the automatic focusing function can automatically focus a shot object during shooting, so that the shot object can be clearly imaged.
Taking an auto-focus mobile phone as an example, fig. 1 is a schematic structural diagram of an auto-focus AF mobile phone. As shown in fig. 1, the AF mobile phone may include one or more camera modules 101 with auto-focusing capability, and the one or more camera modules 101 may be disposed on the back side of the mobile phone or on the front side of the mobile phone. When the AF mobile phone photographs a photographed object, the camera module 101 may automatically complete focusing on the photographed object to obtain a clear image of the photographed object. Fig. 2 (a) is a schematic diagram of an image acquired by the camera module of the AF mobile phone when the subject is not focused, and as shown in fig. 2 (a), the acquired image of the subject is relatively blurred and has low sharpness when the camera module of the AF mobile phone is not focused on the subject. Fig. 2 (b) is a schematic diagram of an image acquired by the camera module of the AF mobile phone after automatically focusing the shot object, and as shown in fig. 2 (b), after the camera module of the AF mobile phone automatically focuses on the shot object, the acquired image of the shot object is clearer compared with that before focusing, and the actual form of the shot object can be reflected better. Therefore, the AF mobile phone can acquire the image of the shot object with high definition through the automatic focusing capacity of the camera module, and the automatic focusing process is automatically executed by the AF mobile phone and does not need manual operation of a user, so that the shooting experience of the user is improved.
The camera module generally includes a lens, an image sensor, and a voice coil motor. The automatic focusing function of the camera module is generally realized by a voice coil motor. The voice coil motor comprises a rotor part and a stator part, wherein the rotor part is fixed with a lens, and the rotor part can move relative to the stator part in the optical axis direction. The image sensor is fixed on one side of the voice coil motor far away from the lens. The lens can move along with the mover part, so that the imaging focus of the lens on a shot object can be positioned on the image sensor. Thus, the terminal equipment can realize clear imaging on the shot object. Generally, the mover portion moves relative to the stator portion in a manner that the stator portion is a magnet, the mover portion is an energizing coil, and after the energizing coil is energized, a magnetic field of the magnet can generate lorentz force, that is, thrust of the mover portion for pushing the lens, on moving charges in the energizing coil.
Fig. 3 is a schematic diagram illustrating the positional relationship between the vcm, the lens and the image sensor, and as shown in fig. 3, the vcm 103 and the lens 102 may be disposed on the light-collecting side of the image sensor 104. The voice coil motor 103 may be provided with a lens opening 105, the lens 102 is located in the lens opening 105, and the light emitting side of the lens 102 corresponds to the light receiving side of the image sensor 104. The lens 102 can collect light of a photographed object, the voice coil motor 103 can drive the lens 102 to perform auto-focusing, then the light collected by the lens 102 is projected on the image sensor 104, and the image sensor 104 can convert the collected optical signal into an electrical signal to complete conversion of the photoelectric signal.
The magnitude of the lorentz force is related to factors such as the magnitude of current in the energized coil and the length of the energized coil, so that for some voice coil motors, if the current of the energized coil is too low, the lorentz force received by the mover part is too small, namely the motor thrust of the voice coil motor is too small, and the accuracy of terminal equipment automatic focusing is influenced.
Fig. 4 is a schematic structural diagram of a conventional voice coil motor, and as shown in fig. 4, the structure of the voice coil motor may include a first magnet 201, a second magnet 202, a first toroidal coil 203, and a first housing 204, where the first housing 204 may be a cubic structure, and a cavity is disposed inside the first housing 204. The first housing 204 may further have an opening extending from the top surface to the inner cavity, and the lens is fixed in the cavity and extends from the opening to the outside of the first housing 204. The first ring coil 203 is located in the cavity of the first housing 204 and is fixedly connected with the lens. And the central axis of the first loop coil 203 may coincide with the optical axis of the lens, the first loop coil 203 may be referred to as a bobbin-wound coil. The first magnet 201 and the second magnet 202 may be symmetrically distributed on two sides of the first toroidal coil 203 with a central axis of the first toroidal coil 203 as a center, and the first magnet 201 and the second magnet 202 may be fixed on an inner wall of a cavity of the first housing 204, so that under the magnetic field effect of the first magnet 201 and the second magnet 202, the first toroidal coil 203 may move along the optical axis direction relative to the first magnet 201 and the second magnet 202, and simultaneously, the lens may be driven to move along the optical axis direction, the first housing 204 and the first magnet 201 and the second magnet 202 may be referred to as a stator part of the voice coil motor, and the first toroidal coil 203 may be referred to as a mover part of the voice coil motor. However, in this motor structure, only the side where the first magnet 201 is arranged and the side where the second magnet 201 is arranged can generate a magnetic field action on the first toroidal coil 203 to generate a motor thrust. The other two sides where the magnets are not provided cannot generate motor thrust although the first toroidal coil 203 is energized and consumes electric power. Therefore, the motor structure still has the problem of insufficient thrust even though more electric energy is consumed.
Fig. 5 is a schematic structural diagram of another conventional voice coil motor, and as shown in fig. 5, the voice coil motor structure may further include a third magnet 301, a fourth magnet 302, a fifth magnet 303, a sixth magnet 304, a second toroidal coil 305, and a second case 306, where the second case 306 may be a cubic structure, and a cavity is disposed inside the second case 306. The first housing 204 further defines an opening extending from the top surface to the inner cavity, and the lens is fixed in the cavity and extends from the opening to the outside of the second housing 306. The second toroidal coil 305 is located inside the second housing 306 and is fixedly connected to the lens. The central axis of the second toroidal coil 305 may coincide with the optical axis of the lens, and thus, the second toroidal coil 305 may be referred to as a bobbin-wound coil. The third magnet 301, the fourth magnet 302, the fifth magnet 303 and the sixth magnet 304 may be symmetrically distributed outside the second toroidal coil 305 around a central axis of the second toroidal coil 305, and the third magnet 301, the fourth magnet 302, the fifth magnet 303 and the sixth magnet 304 may be fixed on an inner wall of a cavity of the second housing 306, so that the second toroidal coil 305 may move in an optical axis direction with respect to the third magnet 301, the fourth magnet 302, the fifth magnet 303 and the sixth magnet 304 while driving the lens to move in the optical axis direction under a magnetic field action of the third magnet 301, the fourth magnet 302, the fifth magnet 303 and the sixth magnet 304, the second housing 306 and the third magnet 301, the fourth magnet 302, the fifth magnet 303 and the sixth magnet 304 may be referred to as a stator portion of the voice coil motor, and the second toroidal coil 305 may be referred to as a mover portion of the voice coil motor. Compared with the first traditional motor structure, the motor structure has the advantages that the two magnets are added, and the integral size of the motor is increased immediately. However, since the layout space of the motor structure and the camera module in the terminal device is small, the motor with a large size is not favorable for the structural layout, and cannot be applied to the actual terminal device.
The embodiment of the application provides a motor, camera module and electronic equipment, can solve the problem that current motor structure thrust is not enough under the condition that does not increase motor size.
The motor provided by the embodiment of the application can be applied to terminal equipment to realize the automatic focusing function of the terminal equipment. Terminal devices include, but are not limited to, smart phones, tablets, personal computers, workstation devices, large screen devices (e.g., smart screens, smart televisions, etc.), wearable devices (e.g., smart wristbands, smart watches), handheld game consoles, home game consoles, virtual reality devices, augmented reality devices, mixed reality devices, etc., in-vehicle smart terminals, digital cameras, video cameras, sports cameras, recorders, surveillance cameras, etc.
The structure of the motor provided in the embodiments of the present application is exemplarily described below with reference to the drawings.
Fig. 6 is a schematic structural diagram of a first partial structure of a motor according to an embodiment of the present disclosure, and as shown in fig. 6, the motor according to the embodiment of the present disclosure includes a first magnetic body 210, a second magnetic body 220, a first coil 230, and a second coil 240. The first magnetic body 210 and the second magnetic body 220 are disposed opposite to each other, the first coil 230 and the second coil 240 are disposed opposite to each other, the first coil 230 is located inside the first magnetic body 210, and the second coil 240 is located inside the second magnetic body 220.
The first coil 230 may be a coil formed by winding a certain length of metal material such as copper wire or aluminum wire, and after the winding is completed, one end of the metal wire forms a first end of the first coil 230, and the other end of the metal wire forms a second end of the first coil 230. The second coil 240 may also be a coil formed by winding a metal material such as a copper wire or an aluminum wire with a certain length, and after the winding is completed, one end of the metal wire forms a third end of the first coil 230, and the other end of the metal wire forms a fourth end of the second coil 240.
Wherein, the first end of the first coil 230 and the third end of the second coil 240 may be coupled to a positive pole of the power supply, and the fourth end of the first coil 230 may be coupled to a negative pole of the power supply. Alternatively, the first end of the first coil 230 and the third end of the second coil 240 may be coupled to a negative pole of a power supply, and the fourth end of the first coil 230 may be coupled to a positive pole of the power supply. In this way, a parallel connection of the first coil 230 and the second coil 240 may be achieved.
The magnetic pole distribution directions of the first magnetic body 210 and the second magnetic body 220 are the optical axis direction, and the magnetic pole directions of the first magnetic body 210 and the second magnetic body 220 are the same. Thus, after the first coil 230 and the second coil 240 are energized, the first magnetic body 210 and the second magnetic body 220 can make the first coil 230 and the second coil 240 move along the same direction of the optical axis, thereby achieving the purpose of automatic focusing.
The first and second magnetic bodies 210 and 220 may be permanent magnets or electromagnets, and if the first and second magnetic bodies 210 and 220 are electromagnets, the direction of the magnetic field may be changed by changing the direction of the current applied thereto, and the specific materials and dimensions of the first and second magnetic bodies 210 and 220 may be designed according to practical situations, which is not specifically limited in this application.
In the embodiment of the present application, in the optical axis direction, the magnetic pole directions of the first magnetic body 210 and the second magnetic body 220 may be: the first magnetic body 210 has a north (north, N) pole at the bottom, a south (south, S) pole at the top, an N pole at the bottom, and an S pole at the top. Alternatively, the first magnetic element 210 has an S-pole bottom and an N-pole top, and the second magnetic element 220 has an S-pole bottom and an N-pole top.
In the embodiment of the present application, the distance between the first magnetic body 210 and the first coil 230, and the distance between the second magnetic body 220 and the second coil 240 may be determined according to practical situations, which is not specifically limited in the present application.
Further, since the first coil 230 is in the magnetic field of the first magnetic body 210, after the first coil 230 is energized, the magnetic field of the first magnetic body 210 may generate a first lorentz force F1 on the first coil 230, and the first coil 230 may move relative to the first magnetic body 210 under the action of the first lorentz force F1. Since the second coil 240 is in the magnetic field of the second magnetic body 220, after the second coil 240 is energized, the magnetic field of the second magnetic body 220 may generate a second lorentz force F2 on the second coil 240, and the second coil 240 may move relative to the second magnetic body 220 under the second lorentz force F2.
It can be understood that, in the embodiment of the present application, the sum of the magnitudes of the forces of the first lorentz force F1 and the second lorentz force F2 is the thrust of the motor provided by the embodiment of the present application
Of (c) is used.
Fig. 7 is a schematic circuit connection diagram of a motor according to an embodiment of the present application, and the magnitudes of the first lorentz force F1 and the second lorentz force F2 and related influencing factors are exemplarily described below with reference to fig. 7.
Generally, the magnitude of the lorentz force applied to the energized coil satisfies the following formula one:
the formula I is as follows:
F=BIL；
wherein, the first and the second end of the pipe are connected with each other,Fin order to provide the thrust of the motor,Bas to the strength of the magnetic field,Iin order for the current to flow through the energized coil,Lis the effective coil length.
The current flowing through the coil satisfies the following formula two:
the formula II is as follows:
wherein the content of the first and second substances,Uis the voltage across the coil or coils,Ris the total resistance of the coil.
Further, the supply voltage of the motor is U, and the resistances of the first coil 230 and the second coil 240 are R 0 The effective coil length of the first coil 230 and the second coil 240 is L 0 For example, the first and second Lorentz forces F1 and F2 and the motor thrust are applied
The calculation formula of (a) is introduced.
The following equations are shown in the first and second equations:
the magnitudes of the currents flowing through the first coil 230 and the second coil 240 each satisfy the following formula three:
the total current magnitude flowing through the first coil 230 and the second coil 240 satisfies the following formula four:
then, the magnitudes of the first and second lorentz forces F1 and F2 each satisfy the following formula five:
then, the motor thrust of the embodiment of the present application
The following formula six is satisfied:
in order to further show the improvement effect of the embodiment of the present application on the motor thrust, the motor composed of two parallel coils provided by the embodiment of the present application is described below in comparison with the motor composed of two series coils.
Fig. 8 is a schematic diagram of the circuit connection relationship of two coils connected in series. As shown in fig. 8, the motor including two coils connected in series may include a seventh magnet 401, an eighth magnet 402, a first side winding coil 403, and a second side winding coil 404, the seventh magnet 401 may be disposed opposite to the eighth magnet 402, the first side winding coil 403 may be disposed inside the seventh magnet 401, the second side winding coil 404 may be disposed inside the eighth magnet, the first side winding coil 403 may be disposed opposite to the second side winding coil 404, and the first side winding coil 403 and the second side winding coil 404 may be connected in series.
A formula of the motor thrust of the motor formed by two coils connected in series is described, taking the power supply voltage of the motor as U, the resistances of the first side-winding coil 403 and the second side-winding coil 404 as R, and the effective coil lengths of the first side-winding coil 403 and the second side-winding coil 404 as L as examples. Wherein:
the magnitudes of the currents flowing through the first side-winding coil 403 and the second side-winding coil 404 each satisfy the following formula seven:
the total current flowing through the first side-winding coil 403 and the second side-winding coil 404 satisfies the following equation eight:
then, the magnitudes of the lorentz force F3 received by the first side winding coil 403 and the lorentz force F4 received by the second side winding coil 404 both satisfy the following formula five:
the motor thrust of a motor consisting of two coils connected in series
' satisfies the following formula nine:
when in use
= nR, and
where n is not less than 0, the motor thrust of the embodiment of the present application is not less than 0
The following formula ten is satisfied:
therefore, according to the above formula, the resistance values of the first coil 230 and the second coil 240 are not considered
In this embodiment, the thrust of the motor is increased, specifically, the thrust of the motor can be increased twice as much as the thrust of the motor formed by two coils connected in series. Therefore, the improved scheme of the embodiment of the application can improve the problem of insufficient thrust of the motor.
Further, the total current flowing through the first coil 230 and the second coil 240 is equal to
The total current flowing through the first side-wound coil 403 and the second side-wound coil 404 is of magnitude
。
Then, when
When the carbon content is more than 4R,
，
thus, when
When the current exceeds 4R, the total current flowing through the coil can be reduced, the heat generation of the coil can be reduced, and the thrust of the motor can be increased.
When 0 <
When the number of the carbon atoms is less than 4R,
，
therefore, the embodiment of the application can increase the motor thrust.
For example, in
=R，
Therefore, the embodiment of the application can achieve the purpose of increasing the thrust of the motor without increasing the resistance of the coil.
When the temperature is higher than the set temperature
When the number of the carbon atoms is not less than 4R,
，
therefore, the motor thrust can be increased under the condition that the coil current is not increased.
To sum up, the embodiment of the present application can further change the total current flowing through the coil by adjusting the resistance of the first coil 230 and the second coil 240, so as to increase the thrust of the motor and avoid the problem of insufficient thrust of the motor.
In some implementations, the coil total resistance R satisfies the following equations eleven and twelve:
the formula eleven:
wherein, the first and the second end of the pipe are connected with each other,
in order to be the resistivity of the energized coil,
the total coil length of the energized coil.
Equation twelve:
wherein the content of the first and second substances,
in order to be the resistivity of the energized coil,
the total length of the coil of the energized coil,
the cross-sectional area of a single turn of the energized coil.
From the above formula, the magnitude of the Lorentz force applied to the energized coil and the resistivity of the energized coil can be found
Total coil length of the energized coil
Cross sectional area of single coil of energizing coil
(diameter of single coil of electrified coil) and the like. The embodiment of the present application can adjust the resistivity of the first coil 230 and the second coil 240
Total length of coil
And/or cross-sectional area of a single turn
To adjust the resistance of the first coil 230 and the second coil 240. For example, if it is required to increase the resistance of the first coil 230 or the second coil 240 by 4 times, the diameter of a single coil of the energized coil can be reduced, and the total length of the coil can be increased to make the effective coil length 4 times as long, so that
。
In the embodiment of the present application, the resistance value of the first coil 230 and the resistance value of the second coil 240 may be equal, and the magnetic field strength of the first magnetic body 210 and the magnetic field strength of the second magnetic body 220 may be equal, so that it can be ensured that the motor thrust of the side where the first coil 230 is located and the motor thrust of the side where the second coil 240 is located are equal, and the lens 400 can be prevented from deviating in the non-optical axis direction during auto-focusing, which affects the auto-focusing effect.
Fig. 9 is a schematic structural diagram of a second partial structure of a motor according to an embodiment of the present application, and as shown in fig. 9, the motor according to the embodiment of the present application further includes: a first electrode pin 250, a second electrode pin 260, a first lower spring 280, a second lower spring 290, a first terminal 310, a second terminal 320, a third terminal 330, and a fourth terminal 340. Wherein the first lower spring 280 is located at one side of the first coil 230 and the second coil 240, and the second lower spring 290 is located at the other side of the first coil 230 and the second coil 240. The first fixed end 2801 of the first lower spring 280 is close to the first end of the first coil 230, and the third fixed end 2802 of the first lower spring 280 extends in a direction close to the third end of the second coil 240. Second fixed end 2901 of second lower spring plate 290 is close to the second end of first coil 230, and fourth fixed end 2902 of second lower spring plate 290 extends in a direction close to the fourth end of second coil 240.
The first electrode pin 250 is fixed to the first fixing end 2801, for example, the first electrode pin 250 may be welded on a bottom surface of the first fixing end 2801. The second electrode pin 260 is fixed at the second fixing end 2901, for example, the second electrode pin 260 may be welded at the bottom surface of the second fixing end 2901. The first and second electrode pins 250 and 260 may be used to couple to a positive or negative power supply.
It will be appreciated that the polarities of the first and second electrode pins 250 and 260 are opposite, for example: the first electrode pin 250 is coupled to the positive pole of the external power supply, and the second electrode pin 260 is coupled to the negative pole of the external power supply, or the first electrode pin 250 is coupled to the negative pole of the external power supply, and the second electrode pin 260 is coupled to the positive pole of the external power supply, so as to supply power to the motor of the embodiment of the present application. When the motor of the embodiment of the present application is applied to a terminal device, the external power source connected to the first electrode pin 250 and the second electrode pin 260 is a power source of the terminal device.
The first terminal 310 and the second terminal 320 may be fixed on the first lower spring 280, and the first terminal 310 and the second terminal 320 may be symmetrically disposed on the first lower spring 280 along the length direction of the first lower spring 280. For example, a first contact pin 310 and a second contact pin 320 may be welded to the top surface of the first lower spring 280, the first contact pin 310 being near the first end of the first coil 230, and the second contact pin 320 being near the third end of the second coil 240. Thus, the first terminal 310 and the second terminal 320 can be electrically connected to the first lower spring 280.
Third and fourth contact posts 330 and 340 may be fixed on second lower spring 290, and third and fourth contact posts 330 and 340 may be symmetrically disposed on second lower spring 290 along a length direction of second lower spring 290. For example, third terminal 330 and fourth terminal 340 may be welded to the top surface of second lower spring 290, third terminal 330 being near the second end of first coil 230, and fourth terminal 340 being near the fourth end of second coil 240. Thus, the third contact post 330 and the fourth contact post 340 can be electrically connected to the second lower spring 290.
In some implementations, the material of the first lower spring 280 and the second lower spring 290 may be a metal material with good electrical conductivity, and the material of the first terminal 310, the second terminal 320, the third terminal 330, and the fourth terminal 340 may also be a metal material with good electrical conductivity, such as metal copper, or beryllium copper alloy, so that the first lower spring 280, the second lower spring 290, the first terminal 310, the second terminal 320, the third terminal 330, and the fourth terminal 340 may all be electrically conductive.
With continued reference to fig. 9, the motor provided by the embodiment of the present application further includes a first wire 2301 led out from the first end of the first coil 230, a second wire 2401 led out from the third end of the second coil 240, a third wire 2302 led out from the second end of the first coil 230, and a fourth wire 2402 led out from the fourth end of the second coil 240. One end of the first wire 2301 is electrically connected to a first end of the first coil 230, and the other end is electrically connected to the first terminal 310. One end of the second wire 2401 is electrically connected to the third end of the second coil 240, and the other end is electrically connected to the second terminal 320. One end of the third wire 2302 is electrically connected to the second end of the first coil 230, and the other end of the third wire 2302 is electrically connected to the third terminal 330. One end of the fourth wire 2402 is electrically connected to the fourth end of the second coil 240, and the other end is electrically connected to the fourth terminal 340.
Thus, the first end of the first coil 230 may be electrically connected to the first electrode pin 250 through the first wire 2301, the first terminal 310 and the first lower spring 280, and thus coupled to the positive electrode or the negative electrode of the power source, and the second end of the first coil 230 may be electrically connected to the second electrode pin 260 through the third wire 2302, the third terminal 330 and the second lower spring 290, and thus coupled to the negative electrode or the positive electrode of the power source. The third end of the second coil 240 may be electrically connected to the first electrode pin 250 through the second wire 2401, the second terminal 320, and the first lower lead 280, so as to be coupled to the positive electrode or the negative electrode of the power source, and the fourth end of the second coil 240 may be electrically connected to the second electrode pin 260 through the fourth wire 2402 and the second lower lead 290, so as to be coupled to the negative electrode or the positive electrode of the power source.
When a voltage is applied between the first electrode pin 250 and the second electrode pin 260, the first terminal of the first coil 230 and the third terminal of the second coil 240 are equal, and the second terminal of the first coil 230 and the fourth terminal of the second coil 240 are equal. Therefore, the first coil 230 and the second coil 240 can be connected in parallel by the routing scheme of the embodiment of the present application.
In some implementations, the lengths of the first wire 2301, the second wire 2401, the third wire 2302, and the fourth wire 2402 may be equal. Further, since the first coil 230 is extended with the first wire 2301 and the third wire 2302, and the second coil 240 is extended with the second wire 2401 and the fourth wire 2402, the coil length of the first coil 230 is equal to the coil length of the second coil 240, so that the motor thrust contributed by the first coil 230 is equal to the motor thrust contributed by the second coil 240. Therefore, the stress of the motor is balanced, and the influence on the working performance of the motor caused by poor deflection can be avoided.
Fig. 10 is a schematic view of a first overall structure of a motor provided in the embodiment of the present application, and as shown in fig. 10, the motor provided in the embodiment of the present application is overall in a cuboid shape, and includes a housing 200 and a base 300, the housing 200 is disposed on the base 300, and a cavity may be formed between the housing 200 and the base 300, and the cavity may be used to accommodate other components of the motor or components such as a lens 400. Therefore, the housing 200 serves to fix and protect other components located inside thereof, and also functions as a magnetic conductor, and the base 300 serves to support the entire motor structure.
With continued reference to fig. 10, a first opening 2001 may be defined in the top surface of the housing 200, wherein the first opening 2001 extends from the top surface of the housing 200 to the interior of the housing 200 and communicates with the cavity of the housing 200. The first opening 2001 accommodates therein the lens 400, and the lens 400 can move up and down inside the first opening 2001 to complete a focusing process. The top surface of the housing 200 is the light incident side of the lens 400.
Fig. 11 is a schematic view of a second overall structure of the motor according to the embodiment of the present disclosure, as shown in fig. 11, a second opening 3001 is formed in a bottom surface of the base 300, and the second opening 3001 penetrates through the bottom surface of the base 300. The bottom surface of the base 300 is the light-emitting side of the lens 400, and external light enters the lens 400 from the light-emitting side of the lens 400 and exits from the light-emitting side through the second opening 3001.
Fig. 12 is a schematic view of a disassembled structure of a motor according to an embodiment of the present application.
As shown in fig. 12, the motor provided in the embodiment of the present application further includes a carrier 270. The carrier 270 is located between the first magnetic body 210 and the second magnetic body 220, the first coil 230 is located between the first magnetic body 210 and the carrier 270, the first coil 230 is fixed on the carrier 270, the second coil 240 is located between the second magnetic body 220 and the carrier 270, and the second coil 240 is also fixed on the carrier 270.
Further, the carrier 270 may be provided with a third opening 2701, and the third opening 2701 may penetrate from the top surface of the carrier 270 to the bottom surface of the carrier 270. The lens 400 may be fixed in the third opening 2701, and a central axis of the third opening 2701 may coincide with an optical axis of the lens 400. One side of the carrier 270 is a light incident side of the lens 400, and the other side of the carrier 270 is a light emergent side of the lens 400.
In the embodiment of the present application, the first magnetic member 210 and the second magnetic member 220 are fixed to the inner wall of the housing 200, and are symmetrically distributed on both sides of the carrier 270 around the optical axis of the lens 400.
In the embodiment of the present application, the first terminal 310 and the second terminal 320 are located outside the carrier 270, and the third terminal 330 and the fourth terminal 340 are located outside the carrier 270.
In some implementations, the inner wall of the third opening 2701 may be provided with threads, and the outer surface of the lens 400 may also be provided with threads. Thus, the lens 400 may be threadedly coupled to the third opening 2701 to secure the lens 400 to the carrier 270.
It should be added here that, since the first coil 230 and the second coil 240 are symmetrically disposed on both sides of the optical axis, the first coil 230 and the second coil 240 may also be referred to as side-winding coils.
In some implementations, with continued reference to fig. 12, one end of the first electrode pin 250 is connected to the first lower spring 280, and the other end may extend out of the base 300, such that the first electrode pin 250 may be electrically connected to an external power source, such as to a positive or negative pole of the power source. One end of the second electrode pin 260 is connected to the second lower spring 290, and the other end thereof may extend out of the base 300, so that the second electrode pin 260 may be electrically connected to an external power source, for example, to a negative electrode or a positive electrode of the power source.
In the embodiment of the present application, the first and second magnetic bodies 210 and 220 may be fixed on the inner sidewall of the case 200, so that a stator portion of the motor may be formed. The first and second coils 230 and 240 are movable along the optical axis by the magnetic field, and the carrier 270 is movable with the first and second coils 230 and 240. In this way, the mover portion of the motor can be formed.
Further, the first coil 230 is in the magnetic field of the first magnetic body 210, the second coil 240 is in the magnetic field of the second magnetic body 220, and when the first electrode pin 250 and the second electrode pin 260 are energized, the first coil 230 and the second coil 240 are energized coils. At this time, the magnetic field of the first magnetic body 210 may generate a first lorentz force F1 in the optical axis direction to the first coil 230, the magnetic field of the second magnetic body 220 may generate a second lorentz force F2 in the optical axis direction to the second coil 240, and the directions of the first and second lorentz forces F1 and F2 may be close to the light incident side of the lens 400. In this way, the first coil 230 and the second coil 240 may move in a direction of approaching the light incident side of the lens 400 along the optical axis by the first lorentz force F1 and the second lorentz force F2, respectively. Then, the first coil 230 and the second coil 240 may move the carrier 270 and the lens 400 fixed on the carrier 270 to complete the auto-focusing of the lens 400.
Fig. 13 is a schematic diagram of the directions of lorentz forces provided by the embodiment of the application, and as shown in fig. 12 and 13, the directions of the first lorentz force F1 and the second lorentz force F2 are exemplarily described by taking an example that the top surfaces of the first magnetic body and the second magnetic body are located on the same side as the light incident side of the lens 400, and the bottom surfaces of the first magnetic body and the second magnetic body are located on the same side as the light emergent side of the lens 400. Specifically, the bottom of the first magnetic body 210 may be an N-pole, the top thereof may be an S-pole, the bottom of the second magnetic body 220 may be an N-pole, and the top thereof may be an S-pole, and the first electrode pin 250 may be coupled to a positive power supply and the second electrode pin 260 may be coupled to a negative power supply.
The current flows in a direction from the first end to the second end of the winding at the top of the first coil 230, and flows in a direction from the second end to the first end of the winding at the bottom of the first coil 230. Then, according to the rule of judging the direction of the lorentz force, the first lorentz force F1 applied to the first coil 230 is directed toward the light incident side. The current flows from the first end to the second end of the wire at the top of the second coil 240, and flows from the second end to the first end of the wire at the bottom of the second coil 240. Then, according to the rule of determining the direction of the lorentz force, the second lorentz force F2 applied to the second coil 240 at this time points to a direction close to the light incident side. Thus, the first coil 230 and the second coil 240 can move along the optical axis toward the light incident side, and auto-focusing is performed.
It is understood that, if the magnetic poles of the first magnetic body 210 and the second magnetic body 220 are reversed, the polarities of the first electrode pin 250 and the second electrode pin 260 are also reversed, and the first coil 230 and the second coil 240 can also be moved along the optical axis in a direction approaching the light incident side.
It should be added that in the embodiment of the present application, the bottom of the first magnetic body 210 may be set as an N-pole, the top thereof may be set as an S-pole, the bottom of the second magnetic body 220 may be set as an N-pole, and the top thereof may be set as an S-pole, and the first electrode pin 250 may be coupled to a negative pole of a power supply and the second electrode pin 260 may be coupled to a positive pole of the power supply. Like this, can make the first lorentz force F1 that first coil 230 receives point to the direction of light-emitting side, can point to the direction that is close to the light-emitting side by the second lorentz force F2 that second coil 240 receives, and then make first coil 230 and second coil 240 move along the direction that the optical axis is close to the light-emitting side. Accordingly, the bottom of the first magnetic body 210 is set as the S pole, the top is set as the N pole, the bottom of the second magnetic body 220 is set as the S pole, and the top is set as the N pole, and the first electrode pin 250 is coupled to the positive pole of the power supply, the second electrode pin 260 may be coupled to the negative pole of the power supply, and the first coil 230 and the second coil 240 may also move along the optical axis toward the light-emitting side.
Further, fig. 14 is a schematic structural diagram of a third partial structure of the motor according to an embodiment of the present disclosure, as shown in fig. 14, a first lower spring 280 and a second lower spring 290 are located between the base 300 and the carrier 270, and the first lower spring 280 may include a first fixed end 2801, a first deformation region 2805, a fifth fixed end 2803, a first connector 2807, a sixth fixed end 2804, a second deformation region 2806, and a third fixed end 2802, which are connected in sequence. The first and third fixing ends 2801 and 2802 are end portions of the first lower spring 280, the first fixing end 2801 is an end portion near a first end of the first coil 230, and the third fixing end 2802 is an end portion near a third end of the second coil 240. The first fixing end 2801 and the third fixing end 2802 are fixed to the base 300, and the fifth fixing end 2803 and the sixth fixing end 2804 are fixed to the carrier 270. Specifically, the first and third fixing ends 2801 and 2802 may be fixed to the top surface of the base 300, and the fifth and sixth fixing ends 2803 and 2804 may be fixed to the bottom surface of the carrier 270. A first deformation region 2805 is connected between the first fixing end 2801 and the fifth fixing end 2803, a first connection body 2807 is connected between the fifth fixing end 2803 and the sixth fixing end 2804, and a second deformation region 2806 is connected between the sixth fixing end 2804 and the third fixing end 2802.
In some implementations, the first and second deformation regions 2805, 2806 may be made of a resilient metal material, and the first and second deformation regions 2805, 2806 may have a serpentine or spring-like shape, for example, such that the first and second deformation regions 2805, 2806 may deform in a certain direction.
The second lower spring plate 290 may include a second fixed end 2901, a third deformation region 2905, a seventh fixed end 2903, a second connection body 2907, an eighth fixed end 2904, a fourth deformation region 2906, and a fourth fixed end 2902, which are connected in sequence. The second fixed end 2901 and the fourth fixed end 2902 are end portions of the second lower spring 290, the second fixed end 2901 is an end portion near the second end of the first coil 230, and the fourth fixed end 2902 is an end portion near the fourth end of the second coil 240. The second fixing end 2901 and the fourth fixing end 2902 are fixed on the base 300, and the seventh fixing end 2903 and the eighth fixing end 2904 are fixed on the carrier 270. Specifically, the second fixing end 2901 and the fourth fixing end 2902 may be fixed on the top surface of the base 300, and the seventh fixing end 2903 and the eighth fixing end 2904 may be fixed on the bottom surface of the carrier 270. A third deformation region 2905 is connected between the second fixed end 2901 and the seventh fixed end 2903, a second connector 2907 is connected between the seventh fixed end 2903 and the eighth fixed end 2904, and a fourth deformation region 2906 is connected between the eighth fixed end 2904 and the fourth fixed end 2902.
In some implementations, the third and fourth deformation regions 2905, 2906 can be made of a resilient metal material, and the third and fourth deformation regions 2905, 2906 can be serpentine or spring-like in shape, so that the third and fourth deformation regions 2905, 2906 can deform in a certain direction.
Further, when the first coil 230 and the second coil 240 are energized during auto-focusing, the magnetic field of the first magnetic body 210 may generate a first lorentz force F1 on the first coil 230, and the magnetic field of the second magnetic body 220 may generate a second lorentz force F2 on the second coil 240. The first deformation region 2805, the second deformation region 2806, the third deformation region 2905, and the fourth deformation region 2906 may be deformed by the first lorentz force F1 and the second lorentz force F2, so that the first coil 230, the second coil 240, and the carrier 270 may move along the optical axis toward the optical side. After the auto-focusing task is finished, the first coil 230 and the second coil 240 are de-energized, the first lorentz force F1 and the second lorentz force F2 disappear, and at this time, the first deformation region 2805, the second deformation region 2806, the third deformation region 2905 and the fourth deformation region 2906 may recover to be deformed, so that the first deformation region 2805, the second deformation region 2806, the third deformation region 2905 and the fourth deformation region 2906 may guide the first coil 230, the second coil 240 and the carrier 270 to be reset.
Fig. 15 is a schematic structural diagram of a fourth partial structure of a motor according to an embodiment of the present invention, and as shown in fig. 15, the motor according to the embodiment of the present invention further includes a frame 350 and an upper spring 360, the frame 350 is located on the top surface of the carrier 270, and the frame 350 can be fixedly connected to the housing 200, and the upper spring 360 is located between the frame 350 and the carrier 270. The frame 350 may be square in shape. The contour of the upper spring 360 may be square, the outer side of the upper spring 360 is fixedly connected with the frame 350, and the inner side of the upper spring 360 is fixedly connected with the carrier 270. In practice, the frame 350 may serve to position the upper spring 360.
Further, the outer side of the upper reed 360 includes a plurality of first joints 3601 and a plurality of second joints 3602, and the plurality of first joints 3601 are distributed on the outer side of the plurality of second joints 3602 in a one-to-one correspondence. A fifth deformation area 3603 is connected between each pair of corresponding first connection points 3601 and second connection points 3602, and a third connection body 3604 is connected between each pair of adjacent second connection points 3602. A plurality of first joints 3601 are used for fixed connection with the frame 350. A plurality of second joints 3602 are provided for secure attachment to carrier 270. Thus, upper reed 360 can be formed.
In some implementations, the fifth deformation region 3603 may be made of an elastic metal material, and the fifth deformation region 3603 may have a serpentine shape or a spring shape, so that the fifth deformation region 3603 may deform along a certain direction.
Further, during auto-focusing, the first coil 230 and the second coil 240 are energized, at this time, the magnetic field of the first magnetic body 210 may generate a first lorentz force F1 on the first coil 230, the magnetic field of the second magnetic body 220 may generate a second lorentz force F2 on the second coil 240, and the fifth deformation region 3603 may be deformed by the first lorentz force F1 and the second lorentz force F2, so that the first coil 230, the second coil 240, and the carrier 270 may move toward the light incident side along the optical axis. After the auto-focusing task is finished, the first coil 230 and the second coil 240 are de-energized, the first lorentz force F1 and the second lorentz force F2 disappear, and at this time, the fifth deformation region 3606 can be deformed again, so that the fifth deformation region 3606 can guide the first coil 230, the second coil 240 and the carrier 270 to be reset.
Further, fig. 16 is a schematic structural diagram of an upper spring plate, a first lower spring plate and a second lower spring plate according to an embodiment of the present application. As shown in fig. 16, the first, third, second and fourth fixing ends 2801, 2802, 2901 and 2902 each include a first connection 3601 corresponding to the position thereof, and the fifth, sixth, seventh and eighth fixing ends 2803, 2804, 2903 and 2904 each include a second connection 3602 corresponding to the position thereof. Specifically, the first fixing end 2801 overlaps the projection of the corresponding first connection 3601 in the optical axis direction. The second fixed end 2901 overlaps with the projection of the corresponding first connection point 3601 in the optical axis direction. The third fixing end 2802 overlaps with a projection of the corresponding first connection 3601 in the optical axis direction. The fourth fixed end 2902 overlaps with the projection of the corresponding first connection point 3601 in the optical axis direction. The fifth fixed end 2803 overlaps the projection of the corresponding second joint 3602 in the optical axis direction, the sixth fixed end 2804 overlaps the projection of the corresponding second joint 3602 in the optical axis direction, the seventh fixed end 2903 overlaps the projection of the corresponding second joint 3602 in the optical axis direction, and the eighth fixed end 2904 overlaps the projection of the corresponding second joint 3602 in the optical axis direction.
In this way, the upper spring 360, the first lower spring 280 and the second lower spring 290 can respectively limit the moving direction of the carrier 270 from the top surface and the bottom surface of the carrier 270, so that the carrier 270 only moves in the optical axis direction, but not in the direction perpendicular to the optical axis or in other directions, and the carrier 270 can be prevented from shifting.
In some implementations, the top surface of the first magnetic body 210 may be fixed to the bottom surface of the frame 350, and the top surface of the second magnetic body 220 may also be fixed to the bottom surface of the frame 350, so that the first magnetic body 210 and the second magnetic body 220 may be more firmly fixed.
In some implementations, the stiffness coefficients of first lower reed 280, second lower reed 290, and upper reed 360 can be determined by the following process.
Motor thrust of the embodiments of the present application according to Hooke's Law
The following formula thirteen is also satisfied:
wherein, the first and the second end of the pipe are connected with each other,kin order to be a stiffness factor of the steel,sis a displacement of the motor mover section moving in the optical axis direction.
Further, since the mover part and the lens of the motor have a certain self weight, after the mover part and the lens are fixed to the first lower spring 280, the second lower spring 290 and the upper spring 360, the first lower spring 280, the second lower spring 290 and the upper spring 360 deform to a certain degree, which is particularly indicated by a displacement of the mover part near the light emitting side, and the position of the mover part is an initial position before the auto-focusing. Therefore, the present embodiment can determine the stiffness coefficients of first lower reed 280, second lower reed 290, and upper reed 360 according to the initial position of the mover section, the desired displacement of the mover section, and the magnitude of the motor thrust. The specific value of the stiffness coefficient is not specifically limited in the embodiments of the present application.
The manner of fixedly connecting the first fixing end 2801 to the base 300 will be described below. Fig. 17 is a schematic connection diagram of the lower spring and the base provided in the embodiment of the application, as shown in fig. 17, a first through hole 28011 and a second through hole 28012 may be formed in the first fixing end 2801, a first protrusion 3002 and a third protrusion 3003 may be disposed on a top surface of the base 300, a position and a shape of the first protrusion 3002 may match with the first through hole 28011, a position and a shape of the third protrusion 3003 may match with the second through hole 28012, the first protrusion 3002 may be in interference fit with the first through hole 28011, and the third protrusion 3003 may be in interference fit with the second through hole 28012, so that the first fixing end 2801 may be tightly fixed on the base 300. Other fixing end and base 300 or carrier 270 and the connecting position and frame 350 or carrier 270 can be referred to above, and are not described herein.
Fig. 18 is a schematic structural diagram of a damping adhesive provided in an embodiment of the present application, and as shown in fig. 18, in some implementations, a damping adhesive 370 may be further disposed between the carrier 270 and the base 300, and the damping adhesive 370 may play a role of buffering. When the motion state of the terminal device changes suddenly, the damping glue 370 may prevent the lens 400 from being damaged.
Fig. 19 is a schematic structural diagram of a first coil, a second coil and a carrier provided in this embodiment, and fig. 20 is a schematic positional relationship diagram of the first coil and the second carrier provided in this embodiment. As shown in fig. 19 and 20, in the embodiment of the present application, the first coil 230 and the second coil 240 may be annular coils, and two long sides thereof are perpendicular to the optical axis direction. Further, a third protrusion 2702 may be disposed on a side surface of the carrier 270, and the first coil 230 may be wound around the third protrusion 2702, so that the first coil 230 may drive the carrier 270 to move. The connection between the second coil 240 and the carrier 270 can be referred to above, and is not described herein. The first coil 230 and the second coil 240 may have other shapes than a loop coil, which is not particularly limited in this application.
In some implementations, fig. 21 is a schematic structural diagram of a fifth partial structure of a motor provided in an embodiment of the present application, and as shown in fig. 21, the motor provided in the embodiment of the present application may include a first coil 230, a second coil 240, a first electrode pin 250, a second electrode pin 260, a first lower spring 280, a second lower spring 290, a fifth terminal 410, a sixth terminal 420, a fifth conducting wire 430, and a sixth conducting wire 440.
One end of the first lower spring 280 is close to the first end of the first coil 230, and the other end of the first lower spring 280 extends toward the third end of the second coil 240. One end of the second lower spring 290 is close to the second end of the first coil 230, and the other end of the second lower spring 290 extends in a direction of the fourth end of the second coil 240. The first electrode pin 250 may be fixed on the first lower spring 280, for example, the first electrode pin 250 may be welded on the bottom surface of the first lower spring 280. The second electrode pin 260 may be fixed to the second lower spring 290, and for example, the second electrode pin 260 may be welded to the bottom surface of the second lower spring 290. The first and second electrode pins 250 and 260 may be coupled to a positive or negative power supply.
Further, one end of the fifth wire 430 is connected to the first end of the first coil 230, and the other end of the fifth wire 430 is connected to the third end of the second coil 240. One end of a sixth wire 440 is connected to the second end of the first coil 230, the other end of the sixth wire 440 is connected to the fourth end of the second coil 240, and the fifth wire 430 is electrically connected to the fifth terminal 410, and the sixth wire 440 is electrically connected to the sixth terminal 420.
In this way, the first end of the first coil 230 and the third end of the second coil 240 may be electrically connected to the first electrode pin 250 through the fifth wire 430 and the fifth post 410, thereby being coupled to the positive or negative electrode of the power supply. The second end of the first coil 230 and the fourth end of the second coil 240 may be electrically connected to the second electrode pin 260 through a sixth wire 440 and a sixth terminal 420, thereby being coupled to a positive electrode or a negative electrode of a power supply. When a voltage is applied between the first electrode pin 250 and the second electrode pin 260, the first terminal of the first coil 230 and the third terminal of the second coil 240 are equal, and the second terminal of the first coil 230 and the fourth terminal of the second coil 240 are equal. Therefore, the first coil 230 and the second coil 240 can be connected in parallel by the routing scheme of the embodiment of the present application.
In some implementations, embodiments of the present application may further include a controller for implementing precise control of displacement of the motor mover portion. Specifically, the controller may be configured to implement open-loop control, the controller may issue a control command, and the motor may respond to the control command, and implement a control process of control → response. The controller may also be used to implement closed-loop control, and the controller may also implement a control process of control → response → feedback → control, depending on the result due to the control command as a reference condition for a new control command.
The embodiment of the application also provides a camera module. Fig. 22 is a schematic structural disassembly diagram of a camera module provided in an embodiment of the present application, and as shown in fig. 22, the camera module includes a lens 400, an image sensor 500, and a motor provided in any embodiment of the present application. The lens 400 is fixed on the motor, and the image sensor 500 is located on the light emitting side of the lens 400 and is configured to receive an optical signal collected by the lens 400 and convert the optical signal into a digital electrical signal. The image sensor 500 may be, for example, a CCD sensor or a CMOS sensor.
The embodiment of the application provides an electronic equipment, this electronic equipment includes one or more camera module, and wherein, at least one camera module is the camera module that this application embodiment provided, and/or, at least one camera module includes the motor that this application arbitrary embodiment provided. The electronic device includes, but is not limited to, a mobile phone, a tablet computer, a personal computer, a workstation device, a large screen device (e.g., a smart screen, a smart television, etc.), a wearable device (e.g., a smart band, a smart watch), a handheld game machine, a home game machine, a virtual reality device, an augmented reality device, a mixed reality device, etc., an in-vehicle smart terminal, a digital camera, a video camera, a motion camera, a recorder, a surveillance camera, etc., and any device including a camera module.
The above embodiments, objects, technical solutions and advantages of the embodiments of the present application are described in further detail, and it should be understood that the above embodiments are only specific embodiments of the present application and are not intended to limit the scope of the embodiments of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of the embodiments of the present application.
Claims (12)
1. A motor, comprising: the coil comprises a shell (200), a first magnetic body (210), a second magnetic body (220), a first coil (230), a second coil (240), a first electrode pin (250), a second electrode pin (260) and a carrier (270), wherein the first magnetic body, the second magnetic body (220), the first coil, the second coil, the first electrode pin (250), the second electrode pin (260) and the carrier are arranged in a cavity of the shell (200); wherein the carrier (270) is used for fixing a lens (400);
the first magnetic body (210) and the second magnetic body (220) are fixed on the inner wall of the shell (200), and are symmetrically distributed on two sides of the carrier (270) by taking the optical axis of the lens (400) as the center; the magnetic pole directions of the first magnetic body (210) and the second magnetic body (220) are the same and are parallel to the optical axis of the lens (400);
the first coil (230) is positioned between the carrier (270) and the first magnetic body (210) and fixed on the carrier (270); the second coil (240) is located between the carrier (270) and the second magnetic body (220), and is fixed on the carrier (270);
a first end of the first coil (230) is electrically connected with the first electrode pin (250), and a second end of the first coil (230) is electrically connected with the second electrode pin (260); a third end of the second coil (240) is electrically connected with the first electrode pin (250), and a fourth end of the second coil (240) is electrically connected with the second electrode pin (260);
the first electrode pin (250) is used for being coupled to a positive power supply electrode and the second electrode pin (260) is used for being coupled to a negative power supply electrode, or the first electrode pin (250) is used for being coupled to a negative power supply electrode and the second electrode pin (260) is used for being coupled to a positive power supply electrode.
2. The motor of claim 1, further comprising: a first lower spring plate (280) and a second lower spring plate (290);
the first lower spring plate (280) is located at one side of the first coil (230) and the second coil (240), and the second lower spring plate (290) is located at the other side of the first coil (230) and the second coil (240);
the first lower spring plate (280) comprises a first fixed end (2801) close to the first end of the first coil (230), the first electrode pin (250) is fixed at the first fixed end (2801) and is electrically connected with the first lower spring plate (280);
the second lower spring plate (290) includes a second fixing end (2901) near a third end of the second coil (240), and the second electrode pin (260) is fixed at the second fixing end (2901) and electrically connected to the second lower spring plate (290).
3. The motor of claim 2, further comprising: a first terminal (310), a second terminal (320), a third terminal (330), and a fourth terminal (340);
the first terminal post (310) and the second terminal post (320) are positioned outside the carrier (270), fixed on the top surface of the first lower spring plate (280) and electrically connected with the first lower spring plate (280); wherein the first terminal (310) is proximate to a first end of the first coil (230) and the second terminal (320) is proximate to a third end of the second coil (240);
the third terminal (330) and the fourth terminal (340) are positioned outside the carrier (270), fixed on the top surface of the second lower spring plate (290) and electrically connected with the second lower spring plate (290); wherein the third terminal (330) is proximate to the second end of the first coil (230) and the fourth terminal (340) is proximate to the fourth end of the second coil (240).
4. The motor of claim 3, further comprising: a first wire (2301), a second wire (2401), a third wire (2302), and a fourth wire (2402);
one end of the first lead wire (2301) is electrically connected with the first end of the first coil (230), and the other end of the first lead wire (2301) is electrically connected with the first terminal (310);
one end of the second lead (2401) is electrically connected with the third end of the second coil (240), and the other end of the second lead (2401) is electrically connected with the second terminal (320);
one end of the third lead (2302) is electrically connected with the second end of the first coil (230), and the other end of the third lead (2302) is electrically connected with the third terminal (330);
one end of the fourth lead (2402) is electrically connected to the fourth end of the second coil (240), and the other end of the fourth lead (2402) is electrically connected to the fourth terminal (340).
5. The motor of claim 2, further comprising: a base (300);
the housing (200) is disposed on the base (300);
the base (300) is located at the bottom of the carrier (270), and the first lower spring (280) and the second lower spring (290) are located between the base (300) and the carrier (270).
6. The motor of claim 5, wherein the first lower reed (280) further comprises: a third fixed end (2802) close to a third end of the second coil (240), and a first deformation region (2805), a fifth fixed end (2803), a first connector (2807), a sixth fixed end (2804) and a second deformation region (2806) which are located between the first fixed end (2801) and the third fixed end (2802) and are sequentially connected along the direction from the first fixed end (2801) to the third fixed end (2802);
the first fixed end (2801) and the third fixed end (2802) are fixed on the top surface of the base (300), and the fifth fixed end (2803) and the sixth fixed end (2804) are fixed on the bottom surface of the carrier (270);
the first deformation zone (2805) and the second deformation zone (2806) are configured to deform when subjected to a force and to recover from the deformation when the force is removed.
7. The motor of claim 6, wherein the second lower spring (290) further comprises: a fourth fixed end (2902) close to the fourth end of the second coil (240), and a third deformation region (2905), a seventh fixed end (2903), a second connector (2907), an eighth fixed end (2904) and a fourth deformation region (2906) which are located between the second fixed end (2901) and the fourth fixed end (2902) and are sequentially connected along the direction from the second fixed end (2901) to the fourth fixed end (2902);
the second fixing end (2901) and the fourth fixing end (2902) are fixed on the top surface of the base (300), and the seventh fixing end (2903) and the eighth fixing end (2904) are fixed on the bottom surface of the carrier (270);
the third deformation area (2905) and the fourth deformation area (2906) are used for generating deformation when being stressed and restoring the deformation when the stress disappears.
8. The motor of claim 7, further comprising: a frame (350) and an upper reed (360);
wherein the frame (350) is positioned on the top surface of the carrier (270) and fixedly connected with the bottom surface of the shell (200);
the upper reed (360) is positioned between the frame (350) and the carrier (270) and comprises a plurality of first joints (3601) and a plurality of second joints (3602),
the plurality of first connecting positions (3601) are distributed at the outer sides of the plurality of second connecting positions (3602) in a one-to-one correspondence manner; a fifth deformation region (3603) is connected between the first connection position (3601) and the second connection position (3602) corresponding to each pair, and a third connector (3604) is connected between the second connection positions (3602) adjacent to each pair;
the plurality of first joints (3601) are used for being fixedly connected with the frame (350); the second joints (3602) are fixedly connected with the carrier (270);
the fifth deformation zone (3603) is used for deforming when stressed and recovering deformation when the stress disappears.
9. The motor of claim 8, wherein the first fixed end (2801), the second fixed end (2901), the third fixed end (2802), and the fourth fixed end (2902) each correspond to one of the first connections (3601) of the plurality of first connections (3601); wherein the first fixed end (2801) is coincident with the projection of the corresponding first connection point (3601) in the direction of the optical axis; the second fixed end (2901) is superposed with the projection of the corresponding first connection position (3601) in the direction of the optical axis; the third fixed end (2802) is overlapped with the projection of the corresponding first connection position (3601) in the direction of the optical axis; the projection of the fourth fixed end (2902) and the corresponding first connection position (3601) in the optical axis direction is overlapped;
the fifth fixed end (2803), the sixth fixed end (2804), the seventh fixed end (2903), and the eighth fixed end (2904) respectively correspond to one of the second joints (3602) of the plurality of second joints (3602); the fifth fixing end (2803) and the corresponding second connecting part (3602) are projected to coincide in the optical axis direction, the sixth fixing end (2804) and the corresponding second connecting part (3602) are projected to coincide in the optical axis direction, the seventh fixing end (2903) and the corresponding second connecting part (3602) are projected to coincide in the optical axis direction, and the eighth fixing end (2904) and the corresponding second connecting part (3602) are projected to coincide in the optical axis direction.
10. The motor according to claim 1, wherein the first magnetic body (210) has an N-pole bottom and an S-pole top, and the second magnetic body (220) has an N-pole bottom and an S-pole top, respectively, in the optical axis direction of the lens (400);
the first electrode pin (250) is a positive electrode pin, and the second electrode pin (260) is a negative electrode pin;
or, in the optical axis direction of the lens (400), the bottom of the first magnetic body (210) is an S pole, the top of the first magnetic body is an N pole, the bottom of the second magnetic body (220) is an S pole, and the top of the second magnetic body is an N pole;
the first electrode pin (250) is a negative electrode pin, and the second electrode pin (260) is a positive electrode pin.
11. The utility model provides a camera module which characterized in that, camera module includes: a lens (400), an image sensor (500) and a motor according to any of claims 1-10;
the lens (400) is fixed on the carrier (270);
the image sensor (500) is located on a light exit side of the lens (400).
12. An electronic device, comprising: one or more camera modules;
wherein at least one camera module is a camera module according to claim 11 and/or at least one camera module comprises a motor according to any of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211092232.5A CN115190234A (en) | 2022-09-08 | 2022-09-08 | Motor, camera module and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211092232.5A CN115190234A (en) | 2022-09-08 | 2022-09-08 | Motor, camera module and electronic equipment |
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| CN115190234A true CN115190234A (en) | 2022-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211092232.5A Pending CN115190234A (en) | 2022-09-08 | 2022-09-08 | Motor, camera module and electronic equipment |
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