CN117434780A - Electronic equipment - Google Patents

Abstract

The application provides electronic equipment, which comprises a lens assembly and a driving assembly; the lens assembly is connected with the driving assembly and comprises a focusing motor and lenses arranged along an optical axis; the driving component is used for driving the lens component to move along the optical axis, so that the lens component pops up to the outside of the electronic equipment or contracts to the inside of the electronic equipment; the focusing motor comprises a base, a carrier, a coil and a driving magnet; the coil is fixed on the base, and the axis of the coil is coincident with the optical axis; the driving magnet is fixed on the carrier; the coil interacts with the driving magnet to generate driving force, so that the carrier moves along the optical axis relative to the base to realize focusing. According to the scheme of this application, can solve the thickness of electronic equipment and receive the problem of lens diameter influence to can reduce the height of focusing motor, reduce the size of camera lens module.

Description

Electronic equipment

Technical Field

The present application relates to the field of imaging technology, and more particularly, to an electronic device.

Background

Currently, lens modules of electronic devices are commonly arranged in a lying manner. However, the lying lens module has some drawbacks.

On the one hand, as the lens diameter increases, the thickness of the flat-lying lens module increases, resulting in an increase in the thickness of the electronic device. In order to place the lens module in a certain thickness, the diameter of the lens cannot be too large, or the lens needs to be subjected to trimming treatment, which can affect the optical performance of the electronic equipment and reduce the imaging effect of the lens.

On the other hand, the size of the lying type lens module is larger. One reason for the larger size of the lens module is: the carrier (or referred to as mover) of the focusing motor in the lens module is generally processed by injection molding, which results in a larger wall thickness of the carrier, so that the size of the whole motor is larger. The second reason for the larger size of the lens module is: the coils of the focusing motor in the lens module are generally arranged in a side winding mode.

Therefore, the lying lens module cannot meet the current requirements.

Disclosure of Invention

The application provides electronic equipment for solve the problem that current flat lying formula camera lens module exists.

In a first aspect, an electronic device is provided that includes a lens assembly and a drive assembly; the lens assembly is connected with the driving assembly and comprises a focusing motor and lenses arranged along an optical axis; the driving assembly is used for driving the lens assembly to move along the optical axis, so that the lens assembly pops up to the outside of the electronic equipment or contracts into the inside of the electronic equipment; the focusing motor comprises a base, a carrier, a coil and a driving magnet; the coil is fixed on the base, and the axis of the coil coincides with the optical axis; the driving magnet is fixed on the carrier; the coil interacts with the driving magnet to generate driving force, so that the carrier moves along the optical axis relative to the base to realize focusing.

According to the scheme of this application, through setting up drive assembly for the camera lens subassembly can pop out or shrink, can solve the thickness of electronic equipment and receive the problem of camera lens diameter influence. In addition, compared with the coil side winding, the arrangement mode that the coil axis coincides with the optical axis is adopted in the application, so that the height of the focusing motor can be reduced, and the size of the lens module is reduced.

With reference to the first aspect, in certain implementations of the first aspect, the focusing motor further includes a slide shaft fixed to the base and a guide rail fixed to the carrier, the slide shaft and the guide rail extending along the optical axis.

With reference to the first aspect, in certain implementation manners of the first aspect, the carrier is formed by fixedly connecting a first sheet metal part and a second sheet metal part, the guide rail is fixed on the first sheet metal part, and the driving magnet is fixed on the second sheet metal part.

According to the scheme of this application, the carrier is fixed by first sheet metal component and second sheet metal component and forms. Compared with carrier injection molding, the size of the carrier can be reduced by adopting the method of the application due to the smaller thickness of the sheet metal part, so that the size of the focusing motor and the lens module is reduced.

With reference to the first aspect, in certain implementation manners of the first aspect, the manner in which the guide rail is fixed to the first sheet metal part includes:

the guide rail and the first sheet metal part are integrally formed; or the guide rail is fixed on the first sheet metal part through welding; or the guide rail is fixed on the first sheet metal part through dispensing.

With reference to the first aspect, in certain implementations of the first aspect, the carrier is fixed by an injection molding piece and a sheet metal part;

the driving magnet and the guide rail are fixed on the injection molding piece.

With reference to the first aspect, in certain implementations of the first aspect, the focusing motor further includes a magnetic conductive sheet and a magnet; the magnetic conduction piece is fixed on the base, the magnetic attraction magnet is fixed on the carrier, and the magnetic conduction piece and the magnetic attraction magnet interact to generate magnetic attraction force so that the guide rail is attached to the sliding shaft.

According to the scheme of this application, through setting up magnetism and inhale magnetite and magnetic conduction piece, make guide rail and slide shaft laminating, can guarantee that the motion process of carrier is stable to effectively improve optical imaging effect.

With reference to the first aspect, in some implementations of the first aspect, the coil is a circular coil, and a side of the driving magnet, which is close to the coil, is a cambered surface.

According to the scheme of this application, one side that the drive magnetite is close to the coil sets up to the cambered surface, can improve the electromagnetic force that coil and drive magnetite interact produced.

With reference to the first aspect, in certain implementation manners of the first aspect, the focusing motor further includes a C-shaped magnetic conductive sheet, and the driving magnet is bonded to the C-shaped magnetic conductive sheet.

With reference to the first aspect, in certain implementations of the first aspect, the slide shaft includes a first slide shaft and a second slide shaft, the guide rail includes a first guide rail and a second guide rail, the first slide shaft corresponds to the first guide rail, and the second slide shaft corresponds to the second guide rail; the first sliding shaft and the second sliding shaft are positioned on the same side of the base; or the first sliding shaft and the second sliding shaft are diagonally arranged and positioned on two sides of the base.

With reference to the first aspect, in certain implementations of the first aspect, the first rail is a V-shaped rail and the second rail is a U-shaped rail; or, the first guide rail is a U-shaped guide rail, and the second guide rail is a V-shaped guide rail.

According to the scheme of this application, through setting up U-shaped guide rail and V-arrangement guide rail, can reduce the slope (tilt) of motor motion (for example, can guarantee the slope of motor motion within 3 min), tremble when the camera lens module takes photo or video is reduced.

In a second aspect, a focus motor is provided, the focus motor including a base, a carrier, a coil, and a drive magnet; the coil is fixed on the base, and the axis of the coil coincides with the optical axis; the driving magnet is fixed on the carrier; the coil interacts with the driving magnet to generate driving force, so that the carrier moves along the optical axis relative to the base to realize focusing.

In a third aspect, a lens module is provided, the lens module including a lens assembly and a driving assembly; the lens assembly is connected with the driving assembly and comprises a focusing motor and lenses arranged along an optical axis; the driving assembly is used for driving the lens assembly to move along the optical axis, so that the lens assembly pops up to the outside of the electronic equipment or contracts into the inside of the electronic equipment; the focusing motor comprises a base, a carrier, a coil and a driving magnet; the coil is fixed on the base, and the axis of the coil coincides with the optical axis; the driving magnet is fixed on the carrier; the coil interacts with the driving magnet to generate driving force, so that the carrier moves along the optical axis relative to the base to realize focusing.

Drawings

Fig. 1 shows a schematic view of a lying lens module.

Fig. 2 shows a simplified diagram of an upright lens module.

Fig. 3 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.

Fig. 5 shows a schematic structural diagram of a lens module.

Fig. 6 shows a schematic structural view of the motor #1 in a contracted state.

Fig. 7 shows an exploded view of the motor #1.

Fig. 8 shows a partial structure diagram of the motor #1.

Fig. 9 shows a partial structure diagram of the motor #1.

Fig. 10 shows a schematic structural view of the motor #2 in a contracted state.

Fig. 11 shows an exploded view of motor #2.

Fig. 12 shows a partial structure diagram of the motor #1.

Fig. 13 shows a schematic structural view of the motor #3 in a contracted state.

Fig. 14 shows an exploded view of motor #3.

Fig. 15 shows a partial structure diagram of the motor #3.

Fig. 16 shows a partial structure diagram of the motor #3.

Fig. 17 shows a partial structure diagram of the motor #3.

Detailed Description

For ease of understanding, the technical terms involved in the embodiments of the present application are explained and described below.

(1) Optical axis

The optical axis may refer to the direction in which the optical system directs light, referenced to the chief ray of the central field of view. For symmetrical transmission systems, it is common to coincide with the optical system rotation centerline.

(2) Auto Focus (AF)

Autofocus may refer to the use of the principles of lens imaging and light reflection, where light reflected by a subject may be imaged on an image sensor after passing through a lens; a clear image can be formed on the image sensor by moving one or more lenses according to the object distance of the subject. Autofocus can be seen simply as a movement of the lens relative to the image sensor along the optical axis.

(3) Lying type lens module and vertical type lens module

As shown in fig. 1, in a lying (also called periscope) lens module, external light enters the lens module through other components (e.g., a prism); as shown in fig. 2, in the vertical lens module, external light can directly enter the lens module.

Fig. 3 shows a schematic structural diagram of an electronic device 100. The electronic device 100 may have a camera or photographing function, for example, the electronic device 100 may be a mobile phone, a tablet computer, a television (or smart screen), a laptop, a video camera, a video recorder, a camera, or the like. The following describes the electronic device 100 as a mobile phone.

The electronic device 100 may include a display screen and a housing. The housing may include a bezel and a rear cover. The frame may surround the periphery of the display screen, and the frame may surround the periphery of the rear cover. There may be a certain space between the display screen and the rear cover. The display screen may be disposed in parallel with respect to the rear cover.

A front lens module (camera compact module, CCM) 110 may be provided on the display screen of the electronic device 100. As shown in the left diagram of fig. 3, the front lens module 110 may be installed at the upper left portion of the display screen. The front lens module 110 may be used for self-timer shooting, for example.

A rear lens module 120 may be provided on the rear cover of the electronic device 100. As shown in the right diagram of fig. 3, the rear lens module 120 may be installed at the middle upper portion of the rear cover. The rear lens module 120 may be used, for example, to capture a scene around the electronic device 100.

It should be understood that the mounting positions of the front lens module 110 and the rear lens module 120 shown in fig. 3 are merely illustrative, and the mounting positions of the lens modules may not be limited in this application. In some other embodiments, the front lens module 110 and the rear lens module 120 may also be mounted in other locations on the electronic device 100. For example, the front lens module 110 may be installed at the upper middle or upper right portion of the display screen. As another example, the rear lens module 120 may be installed at the upper left or upper right of the rear cover.

It should be understood that the number of front lens modules 110 and rear lens modules 120 shown in fig. 3 is merely illustrative, and the number of lens modules may not be limited in this application. The electronic device 100 may include a greater or lesser number of lens modules.

In the embodiment shown in fig. 4, the rear lens module 120 may be a lens module having a pop-up function (which may also be referred to as a zoom function, a lift function, or the like). As shown in the left diagram of fig. 4, the rear lens module 120 may be partially or completely hidden inside the electronic device. As shown in the right diagram of fig. 4, part or all of the rear lens module 120 may pop out to the outside of the electronic device. In other embodiments, the front lens module 110 may also be a lens module with a telescopic function.

In this embodiment of the present application, the lens module has a pop-up function, which means that the lens module is movable relative to the electronic device 100, so that part or all of the lens module may pop-up from the electronic device 100. In the unpopulated state, part or all of the lens module may be hidden inside the electronic device 100.

Fig. 5 shows a schematic view (or schematic diagram) of a lens module, which may be an upright lens module.

The lens module may include a drive assembly and a lens assembly, but may include other components (e.g., a bracket). It should be understood that the drive assembly and lens assembly of fig. 5 are merely exemplary, and that the specific configuration may be practical.

The lens component is connected with the driving component; the driving component is used for driving the lens component to move along the optical axis, so that the lens component pops up to the outside of the electronic equipment or contracts to the inside of the electronic equipment.

The driving principle of the driving assembly can be a mechanical transmission principle, an electromagnetic principle, a piezoelectric principle or the like.

If based on mechanical transmission principles, in one possible implementation, the drive assembly may include a stepper motor, a lead screw, and a slider. The stepper motor may be engaged with the screw so that the stepper motor may drive the screw to rotate. The screw rod is in threaded fit with the sliding block, so that the sliding block can move along a straight line under the driving of the rotary motion of the screw rod. The slider may drive the lens assembly of fig. 5 such that the lens assembly pops up to the outside of the electronic device or collapses to the inside of the electronic device.

If based on electromagnetic principles, in one possible implementation, the drive assembly may include a magnet and a coil. The drive assembly may be, for example, a voice coil motor. The magnet may be fixed within the electronic device 100. After the coil is energized, the coil interacts with the magnet so that the coil can move relative to the magnet. The coil may drive the lens assembly of fig. 5 such that the lens assembly pops up to the outside of the electronic device or collapses to the inside of the electronic device.

If based on piezoelectric principles, in one possible implementation, the drive assembly may include a drive body. The drive body may undergo deformation such as elongation, contraction, protrusion or depression upon energization. The driving body may drive the lens assembly of fig. 5 such that the lens assembly is ejected to the outside of the electronic device or is contracted to the inside of the electronic device.

As one possible approach, the electronic device may further include a processor for determining a height to eject the lens assembly outside the electronic device. The processor may be electrically connected to the drive assembly such that the processor may send an electrical signal to the drive assembly to control the drive assembly to eject the lens assembly to a height external to the electronic device.

For example, the processor may determine a height to eject the lens assembly out of the electronic device based on an operational mode of the lens module. For example, if the user sets the lens module in the tele mode, the processor determines that the lens module needs to operate in the tele mode, the processor may determine that the lens module needs to be all ejected out of the electronic device. For another example, if the user sets the lens module in the short focus mode, the processor determines that the lens module needs to operate in the short focus mode, the processor may determine that the lens assembly needs to be partially ejected out of the electronic device (e.g., the lens assembly needs to be ejected by one half).

Further, the lens assembly above may further include a focus motor, a lens, and an image sensor (sensor). It should be appreciated that the image sensor may also be located at other positions of the lens module.

The lens may be a fixed focal length lens or a zoom lens. The lens can also be a short-focus lens, a long-focus lens or a periscope lens, etc. The lens may include a barrel, and one or more lenses (lenses) disposed within the barrel and aligned along an optical axis. One end of the lens barrel is assembled with the focusing motor, and the other end of the lens barrel is provided with a light inlet hole for controlling the angle of view of the lens. The lens may be a plastic (plastic) lens or a glass (glass) lens. The lens may be a spherical lens or an aspherical lens.

The lens assembly may operate on the principle that light reflected by the subject is projected onto the image sensor surface through one or more lenses, the focus motor, within the lens. In order to obtain clear and undistorted images, the lens imaging principle can be utilized, the lens barrel is driven by the focusing motor, and the lens in the lens barrel is moved to a proper position, so that light rays can be focused on the image sensor to form clear optical images. The image sensor may convert an optical image into an electrical signal, thereby obtaining an image signal.

The structure of the focus motor proposed in the present application is described in detail below.

The focusing motor comprises a base, a carrier, a coil and a driving magnet; the coil is fixed on the base, and the axis of the coil is coincident with the optical axis; the driving magnet is fixed on the carrier; the coil interacts with the driving magnet to generate driving force, so that the carrier moves along the optical axis relative to the base to realize focusing.

It should be understood that "the axis of the coil coincides with the optical axis" in this application may be "the axis of the coil coincides completely with the optical axis" or "the axis of the coil coincides approximately with the optical axis".

Fig. 6 shows one possible structure of the focus motor, which is denoted as motor #1 for convenience of description. Fig. 7 is an exploded view of the motor #1.

The motor #1 includes a base 301, a first sheet metal member 302, a second sheet metal member 303, a first coil 304, a second coil 305, a first slide shaft 306, a second slide shaft 307, a first drive magnet 308, a second drive magnet 309, a first guide rail 310, and a second guide rail 311.

The following describes the base 301 of motor # 1:

the central region of the base 301 has a first through hole 3011, and the first coil 304, the second coil 305, the first sliding shaft 306, and the second sliding shaft 307 are fixed to the base 301, respectively.

The axis of the first through hole 3011 coincides with the optical axis, and the inner wall of the first through hole 3011 may be designed with an internal thread for installing other parts in the lens module, and of course, the inner wall of the first through hole 3011 may not be designed with an internal thread, depending on practical situations. The dashed line in fig. 7 shows the optical axis.

As a possible way, as shown in fig. 8, a first groove 3012 and a second groove 3013 are provided on one side of the base 301, the first slide shaft 306 is fixed in the first groove 3012, and the second slide shaft 307 is fixed in the second groove 3013, for example, by dispensing. The first and second grooves 3012 and 3013 extend along the optical axis, and thus the first and second slide shafts 306 and 307 also extend along the optical axis.

It should be understood that "extending along the optical axis" may be "extending entirely along the optical axis" or "extending approximately along the optical axis" in this application, and will not be described in detail below.

Illustratively, the sliding shaft is made of 304 stainless steel (sus 304) or 316 stainless steel (sus 316), the sliding shaft surface is coated with a lubricating coating (e.g., a teflon composite coating), and the sliding shaft surface may be uniformly coated with lubricating grease, which will not be described in detail below.

As a possible way, as shown in fig. 8, the bottom of the base 301 is provided with an annular boss 3014, the axis of the annular boss 3014 coincides with the optical axis, the first through hole 3011 penetrates the annular boss 3014, and the first coil 304 and the second coil 305 are wound in the circumferential direction of the annular boss 3014. It should be understood that the number of coils in the motor, the connection manner of the coils, the number of turns of the coils, the wire diameter of the copper wires of the coils, and the like are not limited in this application. Illustratively, the first coil 304 and the second coil 305 are connected in parallel, thereby reducing the resistance of the coils, the number of turns of a single coil may be 81 turns, the wire diameter of the copper wire may be 0.055mm, and ensuring that the resistance of the single coil is less than 23Ω.

Furthermore, the specific shape of the annular boss 3014 is not limited in this application.

Illustratively, the annular boss 3014 may be a circular annular boss, and accordingly, the first coil 304 and the second coil 305 are circular coils.

Illustratively, the annular boss 3014 may be a regular hexagonal annular boss, and accordingly, the first coil 304 and the second coil 305 are regular hexagonal coils.

Illustratively, the annular boss 3014 may be a regular octagonal annular boss, and accordingly, the first coil 304 and the second coil 305 are regular octagonal coils.

It will be appreciated that instead of the coils being wound circumferentially around the annular boss 3014, other means may be used in this application such that the axes of the coils coincide with the optical axis.

For example, without the annular boss 3014 on the base 301, the coil may be directly affixed to the bottom of the base 301 such that the axis of the coil coincides with the optical axis. For another example, the annular boss 3014 is not provided on the base 301, and the coil may be directly adhered to the inner wall of the first through hole 3011 so that the axis of the coil coincides with the optical axis. With respect to these two possible ways, this is not shown in the figures.

Compared with the arrangement mode of coil side winding, the arrangement mode that the coil axis coincides with the optical axis is adopted in the application, so that the height of the focusing motor can be reduced, and the size of the lens module is reduced.

The following describes the carrier of motor # 1:

the carrier of the motor #1 is composed of a first sheet metal part 302 and a second sheet metal part 303 which are fixedly connected. For example, the sheet metal part is formed of sus304 or sus316, which will not be described in detail below. The manner in which the first sheet metal part 302 and the second sheet metal part 303 are fixed includes, but is not limited to, the following:

is fixed by welding and is fixed by dispensing.

According to the scheme of this application, the carrier is fixed by first sheet metal component and second sheet metal component and forms, compares in carrier injection moulding, because the thickness of sheet metal component is less, adopts the size that the method of this application can reduce the carrier to reduce the size of focusing motor and camera lens module.

As a possible way, as shown in fig. 8, the four sides of the base 301 are further provided with 6 bosses (or referred to as limit tables), which are a first boss 3015, a second boss 3016, a third boss 3017, a fourth boss 3018, a fifth boss 3019, and a sixth boss 30110, respectively; as shown in fig. 7, the first sheet metal part 302 is provided with 6 limiting plates (or referred to as limiting claws), which are a first limiting plate 3021, a second limiting plate 3022, a third limiting plate 3023, a fourth limiting plate 3024, a fifth limiting plate 3025 and a sixth limiting plate 3026. The first to sixth bosses 3015 to 30110 correspond to the first to sixth stopper plates 3021 to 3026, respectively. The movement range of the carrier can be limited by designing the boss and the limiting plate.

As a possible way, a buffer block may be provided between the boss and the limiting plate in order to prevent rattling and abnormal sound. As shown in fig. 8, a first buffer block 312, a second buffer block 313, a third buffer block 314, a fourth buffer block 315, a fifth buffer block 316, and a sixth buffer block 317 are fixed to the first to sixth bosses 3015 to 30110, respectively. For example, the buffer blocks may be adhered to the corresponding bosses. The material of the buffer block may be foam, silica gel or thermoplastic polyurethane elastomer (thermoplastic urethane, TPU), etc., and will not be described in detail.

It should be understood that the number of bosses included in the base 301, the number of limiting plates included in the first sheet metal part 302, and the number of buffer blocks are not limited in this application.

As shown in fig. 7, in the motor #1, the first rail 310 and the second rail 311 are fixed to the first sheet metal member 302 in such a manner that: the first sheet metal part 302 is integrally formed with the first rail 310 and the second rail 311 (e.g., integrally formed based on stamping, wire cutting, etc.). As a possible way, the first guide 310 is a U-shaped guide and the second guide 311 is a V-shaped guide.

It will be appreciated that by providing a U-shaped rail and a V-shaped rail, the tilt of the motor motion (tilt) may be reduced (e.g., it may be ensured that the tilt of the motor motion is within 3 minutes), reducing jerk when the lens module takes a photograph or video. Wherein 1min = 1/60 degrees. The advantageous effects of providing the U-shaped guide rail and the V-shaped guide rail will not be described in detail below.

The second sheet metal member 303 has a second through hole 3031, and an axis of the second through hole 3031 coincides with the optical axis, and the second through hole 3031 can be used for mounting a lens.

The first driving magnet 308 and the second driving magnet 309 are fixed to the second sheet metal member 303, respectively. The driving magnet can be N48H or N52H.

Illustratively, as shown in fig. 9, the second sheet metal member includes a bottom plate 3032 and 8 side plates, the bottom plate 3032 being perpendicular to the optical axis, and the 8 side plates respectively extending along the optical axis. The 8 side panels are a first side panel 3033, a second side panel 3034, a third side panel 3035, a fourth side panel 3036, a fifth side panel 3037, a sixth side panel 3038, a seventh side panel 3039 and an eighth side panel 30310, respectively.

The first driving magnet 308 is fixed to the first side plate 3033, and the second driving magnet 309 is fixed to the fifth side plate 3037.

As a possible way, as shown in fig. 9, the first driving magnet 308 and the second driving magnet 309 have arc surfaces (arc shapes) on the sides close to the coil, so that electromagnetic force generated by interaction between the coil and the driving magnets is increased.

As a possible way, as shown in fig. 9, the first driving magnet 308 may be fixed to the first magnetic conductive sheet 318, the second driving magnet 309 may be fixed to the second magnetic conductive sheet 319, and the first magnetic conductive sheet 318 and the second magnetic conductive sheet 319 are fixed to the first side plate 3033 and the fifth side plate 3037, respectively. The magnetic field of the driving magnet can be improved by arranging the magnetic conductive sheet, and the electromagnetic force generated by the interaction of the coil and the driving magnet is improved.

Illustratively, the first and second magnetic conductive sheets 318 and 319 may be C-shaped in shape and may be formed from cold rolled carbon sheet steel (spcc) or sus430.

As a possible way, in order to prevent rattling and abnormal sounds, as shown in fig. 9, both sides of the bottom plate 3032 are provided with buffer blocks 320, respectively.

As a possible way, the motor #1 further includes an elongated magnetic conductive sheet 321 and a magnet 322. As shown in fig. 8, an elongated magnetic conductive sheet 321 is fixed on the base 301; as shown in fig. 9, the magnet 322 is fixed to the third side plate 3035 of the second sheet metal member 303. The position of the long magnetic conductive sheet 321 corresponds to the position of the magnet 322. As an embodiment, the first sliding shaft 306 and the second sliding shaft 307 may be symmetrically disposed at two sides of the elongated magnetic conductive sheet 321.

The interaction of the strip-shaped magnetic conductive sheet 321 and the magnetic attraction magnet 322 generates magnetic attraction force, so that the first guide rail 310 is attached to the first sliding shaft 306, the second guide rail 311 is attached to the second sliding shaft 307, and the stable motion state of the motor carrier is ensured, thereby effectively improving the optical imaging effect.

Illustratively, the magnet 322 is N48H or N52H, the long magnetic conductive sheet 321 is spcc or 430 stainless steel (sus 430), the length of the long magnetic conductive sheet 321 is greater than 7mm, and the magnetic attraction force of the magnet 322 and the long magnetic conductive sheet 321 in the moving direction is less than 2mN during the carrier moving process.

As a possible way, the magnet 322 may be bonded to a C-shaped magnetic sheet fixed to the third side plate 3035 of the second sheet metal member 303. The C-shaped magnetic conductive sheet is used for reducing the magnetic attraction force of the magnetic attraction magnet 322 and the long strip-shaped magnetic conductive sheet 321 in the moving direction.

As a possible way, motor #1 also includes a tunnel magnetic-resistance (TMR) sensor and a magnetic grid 324. As shown in fig. 8, a circuit board 323 (e.g., a flexible circuit board) is fixed to one side of the base 301, and a TMR sensor is provided on the circuit board 323; as shown in fig. 9, the magnetic grid 324 is fixed to the seventh side plate 3039 of the second sheet metal member 303. In one embodiment, circuit board 323 is secured to opposite sides of first slide shaft 306 and second slide shaft 307. By providing a TMR sensor and magnetic grating 324, high accuracy detection of the carrier position can be achieved, improving the focus accuracy of the motor (e.g., focus accuracy can be up to within 3 microns).

Illustratively, the gap between the magnetic gate 324 and the TMR sensor is 0.15mm.

Further, the leads of the first coil 304 and the leads of the second coil 305 may be soldered to the circuit board 323, thereby achieving electrical connection.

In assembling motor #1, the following steps may be performed:

step 1: the components associated with the base 301 (e.g., the first slide shaft 306, the second slide shaft 307, etc.) are secured to the base 301.

Step 2: the components (e.g., the first driving magnet 308, the second driving magnet 309, etc.) associated with the second sheet metal member 303 are fixed to the second sheet metal member 303.

Step 3: the base 301 is assembled with the second sheet metal member 303.

Step 4: the first sheet metal part 302 is fixedly connected with the second sheet metal part 303.

Tables 1 and 2 show the results of performance simulation for motor #1. Wherein, the magnetic attraction force is the magnetic attraction force between the magnetic attraction magnet 322 and the strip-shaped magnetic conductive sheet 321; the friction coefficient is the friction coefficient between the guide rail and the sliding shaft; the TMR-bx disturbance is the magnetic disturbance experienced by the TMR sensor in the x-direction, and the TMR-by disturbance is the magnetic disturbance experienced by the TMR sensor in the y-direction. The simulation results of tables 1 and 2 show that the performance of motor #1 meets the requirements.

TABLE 1

TABLE 2

Fig. 10 shows another possible structure of the focus motor, which is denoted as motor #2 for convenience of description. Fig. 11 is an exploded view of motor #2.

The motor #2 includes a base 401, a first sheet metal member 402, a second sheet metal member 403, a first coil 404, a second coil 405, a first slide shaft 406, a second slide shaft 407, a first drive magnet 408, a second drive magnet 409, a first guide rail 410, and a second guide rail 411.

Unlike the focus motor (motor # 1) shown in fig. 6, as shown in fig. 11 and 12, in the motor #2, the first guide rail 410 and the second guide rail 411 are fixed to the first sheet metal member 402 in such a manner that: fixed by welding or by dispensing.

As a possible way, the first rail 410 is a V-shaped rail and the second rail 411 is a U-shaped rail.

The following describes the base 401 of motor # 2:

similar to the base 301 of the motor #1, the central region of the base 401 has a first through hole 4011, and a first coil 404, a second coil 405, a first slide shaft 406, and a second slide shaft 407 are respectively fixed to the base 401.

As a possible way, one side of the base 401 is provided with a first groove 4012 and a second groove 4013, and specifically reference may be made to the first groove 3012 and the second groove 3013 in the motor #1.

As a possible way, the bottom of the base 401 is provided with an annular boss 4014, and specifically reference may be made to the annular boss 3014 in the motor #1, and the first coil 404 and the second coil 405 may be wound circumferentially along the annular boss 4014.

The following description of the motor #2 carrier is provided:

the first sheet metal part 402 and the second sheet metal part 403 are fixedly connected (for the manner of the fixed connection, reference is made to the foregoing), and form the carrier of the motor #2.

Similar to the base 301, as a possible way, the four sides of the base 401 are also provided with 6 bosses (only 4 of which are shown in fig. 11). Correspondingly, as shown in fig. 12, 6 limiting plates are disposed on the first sheet metal part 402. As a possible way, buffer blocks may be provided on the 6 bosses, respectively.

It should be understood that the number of bosses on the base 401, the number of limiting plates on the first sheet metal part 402, and the number of buffer blocks are not limited in this application.

The structure of the second sheet metal member 403 may refer to the second sheet metal member 303 in the motor #1.

The first driving magnet 408 and the second driving magnet 409 are fixed to the second sheet metal member 403, respectively, and reference is made to the description in motor #1 for details.

As a possible way, similar to the motor #1, as shown in fig. 11, the motor #2 further includes a magnet and an elongated magnetic conductive sheet, wherein the elongated magnetic conductive sheet is fixed on the base 401, and the magnet is fixed on a side plate of the second sheet metal member 403. The functions of the magnet and the strip-shaped magnetic conductive sheet are described above.

As a possible way, like the motor #1, the motor #2 further includes a circuit board (on which the TMR sensor is provided) fixed to the base 401 and a magnetic grid fixed to a side plate of the second sheet metal member 403, as shown in fig. 11. The roles of TMR sensor and magnetic grating are referred to above.

As a possible way, similar to the motor #1, as shown in fig. 11, both sides of the bottom plate of the second sheet metal member 403 may be provided with buffer blocks.

In addition, the assembly process of the motor #2 may refer to the motor #1, and will not be described herein.

Fig. 13 shows another possible structure of the focus motor, which is denoted as motor #3 for convenience of description. Fig. 14 is an exploded view of motor #3.

The motor #3 includes a base 501, an injection molding 502, a sheet metal part 503, a first coil 504, a second coil 505, a first slide shaft 506, a second slide shaft 507, a first drive magnet 508, a second drive magnet 509, a first guide rail 510, and a second guide rail 511.

The following describes the base 501 of motor # 3:

similar to the motor #1 and the motor #2, the center region of the base 501 has a first through hole 5011, and the first coil 504, the second coil 505, the first slide shaft 506, and the second slide shaft 507 are fixed to the base 501, respectively.

Unlike the motor #1 and the motor #2, in the motor #3, the first slide shaft 506 and the second slide shaft 507 are diagonally arranged on both sides of the base 501.

It will be appreciated that by arranging the first and second slide shafts 506, 507 diagonally, the movement of the carrier may be made smoother, reducing the likelihood of tipping during movement, as compared to two slide shafts on the same side in motor #1 and motor #2.

As a possible way, as shown in fig. 14, the base 501 is provided with a first groove 5012 and a second groove 5013 on both sides, the first slide shaft 506 is fixed in the first groove 5012, the second slide shaft 507 is fixed in the second groove 5013, the first groove 5012 and the second groove 5013 extend along the optical axis, and accordingly, the first slide shaft 506 and the second slide shaft 507 extend along the optical axis.

As a possible way, as shown in fig. 14, the bottom of the base 501 is provided with an annular boss 5014, and specifically reference may be made to the annular boss 3014 in the motor #1, and the first coil 504 and the second coil 505 are wound in the circumferential direction of the annular boss 5014.

The following description of the motor #3 carrier is provided:

the injection molding piece 502 and the sheet metal part 503 are fixedly connected to form a carrier of the motor #3. The manner of fixedly connecting the injection molding part 502 and the sheet metal part 503 includes, but is not limited to, the following:

is fixed by hot riveting and fixed by dispensing.

As shown in fig. 16, the injection molding 502 is provided with a first rail 510 and a second rail 511. The first rail 510 and the second rail 511 extend along the optical axis. As a possible way, the first rail 510 is a U-shaped rail or an L-shaped rail, and the second rail 511 is a V-shaped rail.

Similar to motor #1 and motor #2, motor #3 further includes, as a possible manner, an elongated magnetic conductive sheet 512 and a magnet 513, the elongated magnetic conductive sheet 512 being fixed to the base 501, the magnet 513 being fixed to the injection molded member 502, the functions of the elongated magnetic conductive sheet 512 and the magnet 513 being referred to above.

As an implementation manner, as shown in fig. 15, an elongated magnetic conductive sheet 512 is fixed to a corner of the base 501, and the first sliding shaft 506 and the second sliding shaft 507 are symmetrically distributed at both sides of the elongated magnetic conductive sheet 512. Correspondingly, as shown in fig. 16, a first groove 5021 is formed on the injection molding piece 502, and the magnet 513 is disposed in the first groove 5021.

The first drive magnet 508 and the second drive magnet 509 are fixed to the injection molding 502. As an implementation manner, as shown in fig. 16, the injection molding 502 is provided with a second groove 5022 and a third groove 5023, the first driving magnet 508 is fixed in the second groove 5022, and the second driving magnet 509 is fixed in the third groove 5023. Of course, similarly to the motor #1 and the motor #2, the driving magnet in the motor #3 may be fixed to the injection molding 502 by a magnetically conductive sheet.

As a possible way, the motor #3 further includes a circuit board 514 (TMR sensor is provided on the circuit board) and a magnetic grating 515, the circuit board 514 being fixed to the base 501, the magnetic grating 515 being fixed to the injection molded piece 502 to achieve high-precision detection of the carrier position.

As one implementation, as shown in fig. 15, a circuit board 514 is fixed to one side of the base 501; as shown in fig. 16, a fourth groove 5024 is provided on the injection molding 502, and the magnetic grid 515 is fixed in the fourth groove 5024.

As a possible way, as shown in fig. 15, one side of the base 501 is further provided with a first boss 5015 and a second boss 5016. Correspondingly, as shown in fig. 16, a first gap 5025 and a second gap 5026 are provided on one side of the injection molding 502. When the injection molding 502 moves, the limit can be realized by the upper surface of the first gap 5025 and the upper surface of the first boss 5015, and the upper surface of the second gap 5026 and the upper surface of the second boss 5016.

As a possible way, in order to prevent rattle and abnormal sound, as shown in fig. 15, the first and second buffer blocks 516 and 517 may be fixed to the first and second bosses 5015 and 5016, respectively.

It should be appreciated that by providing the first groove 5021, the second groove 5022, the third groove 5023, the fourth groove 5024, the first gap 5025 and the second gap 5026 on the injection molding 502, the weight of the injection molding 502 can be reduced, and the inertia generated when the injection molding 502 moves can be reduced, thereby improving the response speed of the motor.

As shown in fig. 17, the sheet metal member 503 has a second through hole 5031, the axis of the second through hole 5031 coincides with the optical axis, and the second through hole 5031 can be used for mounting a lens. As a possible way, a plurality of buffer blocks 5032 may be provided on the bottom plate of the sheet metal part 503 to avoid the occurrence of rattle and abnormal sound.

In assembling motor #3, the following steps may be performed:

step 1: components associated with the base 501 (e.g., a first slide shaft 506, a second slide shaft 507, etc.) are secured to the base 501.

Step 2: the base 501 is assembled with the sheet metal part 503.

Step 3: the components associated with the injection molding 502 (e.g., the first drive magnet 508, the second drive magnet 509, etc.) are secured to the injection molding 502.

Step 4: the injection molding piece 502 is fixedly connected with the sheet metal part 503.

It should be appreciated that in actual production, the dimensions of the relevant parts (e.g., slide shaft and guide rail) in the above-described motors #1 to #3 may be determined according to the stroke of the focus motor. The stroke of the motor may be 2.7mm, for example, although other values are possible to meet the long and short stroke requirements.

Further, in the above motors #1 to #3, other forms (e.g., balls and rails) may be employed instead of the slide shaft and the rails, thereby achieving movement of the carrier along the optical axis with respect to the base.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. An electronic device, comprising a lens assembly and a drive assembly;

the lens assembly is connected with the driving assembly and comprises a focusing motor and lenses arranged along an optical axis;

the driving assembly is used for driving the lens assembly to move along the optical axis, so that the lens assembly pops up to the outside of the electronic equipment or contracts into the inside of the electronic equipment;

the focusing motor comprises a base, a carrier, a coil and a driving magnet;

the coil is fixed on the base, and the axis of the coil coincides with the optical axis;

the driving magnet is fixed on the carrier;

the coil interacts with the driving magnet to generate driving force, so that the carrier moves along the optical axis relative to the base to realize focusing.

2. The electronic device of claim 1, wherein the focus motor further comprises a slide shaft and a rail, the slide shaft being fixed to the base, the rail being fixed to the carrier, the slide shaft and the rail extending along the optical axis.

3. The electronic device of claim 2, wherein the carrier is comprised of a first sheet metal part and a second sheet metal part fixedly connected;

the guide rail is fixed on the first sheet metal part, and the driving magnet is fixed on the second sheet metal part.

4. The electronic device of claim 3, wherein the electronic device comprises a plurality of electronic devices,

the way in which the guide rail is fixed to the first sheet metal part includes:

the guide rail and the first sheet metal part are integrally formed, the guide rail is fixed to the first sheet metal part through welding, and the guide rail is fixed to the first sheet metal part through dispensing.

5. The electronic device of claim 2, wherein the carrier is formed by fixing an injection molding member and a sheet metal member;

the driving magnet and the guide rail are fixed on the injection molding piece.

6. The electronic device of any one of claims 2-5, wherein,

the focusing motor also comprises a magnetic conduction sheet and a magnetic attraction magnet;

the magnetic conduction piece is fixed on the base, the magnetic attraction magnet is fixed on the carrier, and the magnetic conduction piece and the magnetic attraction magnet interact to generate magnetic attraction force so that the guide rail is attached to the sliding shaft.

7. The electronic device of any one of claims 1-6, wherein,

the coil is a round coil, and one side of the driving magnet, which is close to the coil, is an arc surface.

8. The electronic device of any one of claims 1-7, wherein the focus motor further comprises a C-shaped magnetically permeable sheet, the drive magnet being bonded to the C-shaped magnetically permeable sheet.

9. The electronic device of any one of claims 2-8, wherein the electronic device comprises a memory device,

the sliding shafts comprise a first sliding shaft and a second sliding shaft, the guide rails comprise a first guide rail and a second guide rail, the first sliding shaft corresponds to the first guide rail, and the second sliding shaft corresponds to the second guide rail;

the first sliding shaft and the second sliding shaft are positioned on the same side of the base; or the first sliding shaft and the second sliding shaft are diagonally arranged and positioned on two sides of the base.

10. The electronic device of claim 9, wherein the electronic device comprises a memory device,

the first guide rail is a V-shaped guide rail, and the second guide rail is a U-shaped guide rail; or,

the first guide rail is a U-shaped guide rail, and the second guide rail is a V-shaped guide rail.