CN218272875U - AF motor, camera module and electronic equipment - Google Patents

Abstract

The utility model relates to an AF motor, camera module and electronic equipment, the AF motor includes the base, the carrier, be used for driving the SMA drive part that the carrier moved from second side to first side, a reset part that is used for resetting the carrier from first side to second side, and be used for extending between first side and second side in order to support the direction support portion that leads to the carrier, SMA drive part connects between base and carrier, and configure to shrink and drive the carrier and move from second side to first side after circular telegram, reset part includes the first magnetic part that sets up on the base and sets up the second magnetic part on the carrier, first magnetic part and second magnetic part relative to first magnetic part eccentric settings towards first side, the direction support portion sets up with the reset part homonymy, so that base and carrier hug closely the direction support portion through the magnetic attraction that produces between first magnetic part and the second magnetic part towards each other. The SMA driving part is matched with the resetting part to realize the movement of the carrier in two directions.

Description

AF motor, camera module and electronic equipment

Technical Field

The disclosure relates to the technical field of camera shooting, in particular to an AF motor, a camera shooting module and electronic equipment.

Background

In the related art, the driving modes of the motor in the camera module include a voice coil driving mode and an SMA driving mode. The SMA drive scheme is typically two sets arranged to drive in two opposite directions. For example, chinese patent application 201922226680.X provides a camera module comprising a first SMA actuator and a second SMA actuator, both actuators being configured to drive in opposite directions, further implementing a focusing function. However, this driving method needs to control two sets of SMAs with different driving directions simultaneously, which results in a complex control process and higher control cost.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide an AF motor, a camera module, and an electronic apparatus to at least partially solve technical problems in the related art.

In order to achieve the above object, the present disclosure provides an AF motor including a base, a carrier, an SMA driving part for driving the carrier to move from a second side to a first side, a resetting part for resetting the carrier from the first side to the second side, and a guide support part for extending between the first side and the second side to support and guide the carrier, wherein the SMA driving part is connected between the base and the carrier and configured to contract after being energized to drive the carrier to move from the second side to the first side, the resetting part includes a first magnetic member provided on the base and a second magnetic member provided on the carrier, the first magnetic member and the second magnetic member are disposed opposite to each other, and the second magnetic member is eccentrically disposed toward the first side with respect to the first magnetic member, and the guide support part is disposed on the same side as the resetting part to enable the base and the carrier to be closely attached to the guide support part by a magnetic attraction force generated between the first magnetic member and the second magnetic member and facing each other.

Optionally, the magnetic attraction force of the first magnetic member to the second magnetic member toward the second side is configured to be not less than the gravity of the moving portion, and the moving portion includes a carrier and a device for mounting on the carrier.

Optionally, the SMA actuation portion includes a V-shaped SMA wire configured to open toward the first side, two top points of the V-shaped SMA wire are connected to the first protruding portion and the second protruding portion at two ends of the base, and a bottom point of the V-shaped SMA wire is connected to the hooking portion in the middle of the carrier.

Optionally, the SMA driving part includes a first SMA wire and a second SMA wire disposed on the same side, and the first SMA wire and the second SMA wire are respectively connected to two pairs of oblique diagonal angles formed by the base and the carrier on the corresponding sides.

Optionally, orthographic projections of the first and second SMA wires towards the first or second side are configured to be parallel to each other with a spacing, and the first and second SMA wires are the same size.

Optionally, first SMA wire pass through first clamping piece connect in first bellying on the base, and connect in through the second clamping piece the installation piece on the carrier, the second SMA wire pass through the third clamping piece connect in second bellying on the base, and connect in through the fourth clamping piece the installation piece, first bellying with the second bellying sets up respectively the both ends of base, the third clamping piece with the fourth clamping piece is located respectively the both ends of installation piece.

Optionally, the third clip piece is disposed outside the first clip piece relative to the carrier, the mounting piece includes a first extending piece extending outward from the carrier at one end and a second extending piece extending outward from the carrier at the other end, the first extending piece is used for mounting the second clip piece, the second extending piece is used for mounting the fourth clip piece, and an extending length of the second extending piece is longer than an extending length of the first extending piece.

Optionally, the SMA drive division includes a SMA wire of hook one-tenth X type, the both ends of base are provided with the first mounting point and the second mounting point of parallel and level, the both ends of carrier are provided with the third mounting point and the fourth mounting point of parallel and level, first mounting point with the third mounting point constructs for diagonal angle, the second mounting point with the fourth mounting point constructs for diagonal angle, the SMA wire connect gradually in first mounting point the third mounting point the fourth mounting point and the second mounting point, just the SMA wire is in the third mounting point with the fourth mounting point is short-circuited.

Optionally, the guide support part comprises a first guide support part and a second guide support part arranged at two ends of the carrier on the same side,

the first guide support part comprises a sliding shaft extending along the moving direction of the carrier or a ball row arranged along the moving direction, when the first guide support part comprises the ball row, the first guide support part can be arranged between the base and the carrier in a rolling way, or the first guide support part is fixed on the base or the carrier,

the second guide support portion includes one of balls, a slide shaft extending in the moving direction, and a ball row arranged in the moving direction, and when the second guide support portion includes the balls or the ball row, the second guide support portion is rollably disposed between the base and the carrier, or the second guide support portion is fixed to the base or the carrier.

Optionally, the first guide support part is supported by a first V-groove formed on the carrier and a second V-groove formed on the base,

the second guide support part is supported by a square groove formed on the base and capable of accommodating the second guide support part and a plane of the carrier; or

When the second guide support portion includes a slide shaft extending in the moving direction or a ball row arranged in the moving direction, the second guide support portion is supported by a third V-groove formed on the base and a plane of the carrier.

Optionally, the first guide support portion is supported by two first sliding shafts arranged side by side on the carrier and two second sliding shafts arranged side by side on the base, and when the second guide support portion includes a sliding shaft extending in the moving direction or a ball row arranged in the moving direction, the second guide support portion is supported by two third sliding shafts arranged side by side on the base and a plane of the carrier.

Optionally, the AF motor further comprises a position sensor for detecting a relative position of the base and the carrier, the position sensor being electrically connected to a power supply element, wherein the position sensor comprises a magnetic field sensor, an electric field sensor, or a photoelectric position sensor.

Optionally, the position sensor includes a magnetic field sensor disposed on one of the carrier and the base, and the other of the carrier and the base is provided with a magnet directly opposite to the magnetic field sensor, and the position sensor is capable of sensing position information of the magnet.

Optionally, the magnet is configured as the first magnetic member or the second magnetic member.

According to a second aspect of the present disclosure, there is also provided an image pickup module including an optical device and the AF motor provided by the present disclosure.

According to a third aspect of the present disclosure, an electronic device is further provided, which includes the camera module provided by the present disclosure.

Through the technical scheme, the AF motor in the embodiment of the disclosure realizes the movement of the carrier to two directions through the magnetic attraction of the SMA driving part to the second side in the way that the SMA driving part is matched with the resetting part to the driving of the first side, simplifies the control process of the SMA driving part, and saves the control cost. In addition, two magnetism spare eccentric settings of portion that resets, first magnetism spare have all the time to the second side magnetism inhale the magnetic attraction of second magnetism spare to make the carrier can have the trend that is close to the base towards the second side under non-operating condition, avoid the carrier to produce and rock the abnormal sound. And the guide supporting part can guide the accurate movement direction of the carrier under the magnetic attraction action of the first magnetic part and the second magnetic part towards each other.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure, but do not constitute a limitation of the disclosure. In the drawings:

fig. 1 is an exploded schematic view of an AF motor provided in an exemplary embodiment of the present disclosure.

Fig. 2 is a partial top view of an AF motor provided in an exemplary embodiment of the present disclosure.

Fig. 3 is a schematic connection diagram of SMA wires provided in an exemplary embodiment of the present disclosure.

Fig. 4 is a schematic connection diagram of SMA wires provided in another exemplary embodiment of the present disclosure.

Fig. 5 is a partial structural schematic view of an AF motor provided in an exemplary embodiment of the present disclosure.

Fig. 6 is an exploded schematic view of an AF motor provided in an exemplary embodiment of the present disclosure.

Fig. 7 is a partial structural schematic view of an AF motor provided in an exemplary embodiment of the present disclosure.

Fig. 8 is a partial structural schematic view of an AF motor provided in an exemplary embodiment of the present disclosure.

Fig. 9 is a schematic view of a first guide support provided in an exemplary embodiment of the present disclosure.

Fig. 10 is a schematic view of a first guide support provided in another exemplary embodiment of the present disclosure.

Fig. 11 is a schematic view of a second guide support provided in an exemplary embodiment of the present disclosure.

Fig. 12 is a schematic view of a second guide support provided in another exemplary embodiment of the present disclosure.

Fig. 13 is a schematic view of a second guide support provided in another exemplary embodiment of the present disclosure.

Fig. 14 is a schematic view of a second guide support provided in another exemplary embodiment of the present disclosure.

Fig. 15 is a partial sectional view of an AF motor provided in an exemplary embodiment of the present disclosure.

Fig. 16 is a partial sectional view of an AF motor provided in an exemplary embodiment of the present disclosure.

Fig. 17 is a schematic view of a camera module according to an exemplary embodiment of the present disclosure.

Fig. 18 is a schematic diagram of an electronic device provided in an exemplary embodiment of the present disclosure.

Description of the reference numerals

1-AF motor, 10-base, 100-housing, 11-first boss, 12-second boss, 13-second V-groove, 14-third V-groove, 15-square groove, 20-carrier, 21-mounting piece, 211-first extension piece, 212-second extension piece, 22-hook, 23-first V-groove, 30-SMA drive, 31-first SMA wire, 301-conductive connection, 311-first clip, 3111-first conductive piece, 3112-first pin, 312-second clip, 32-second SMA wire, 321-third clip, 3211-second conductive piece, 3212-second pin, 322-fourth clip, 41-first magnetic piece, 42-second magnetic piece, 50-guide support, 51-first guide support, 52-second guide support, 53-first slide shaft, 54-second slide shaft, 55-third slide shaft, 61-63-magnet, 62-position sensor module, optical pickup device, and electronic camera module.

Detailed Description

The following detailed description of the embodiments of the disclosure refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, where the contrary explanation is not provided, the use of the directional terms such as "upper, lower, top and bottom" is defined for convenience of description, and may be specifically defined in conjunction with the drawing direction of fig. 5, and in fig. 1, the first side is upper and top, the second side is lower and bottom, and "inner and outer" refer to the inner and outer of the self-outline of the corresponding component, and the use of the terms such as "first, second" and the like in the present disclosure is for distinguishing one element from another element, and has no order or importance. Moreover, when the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.

Referring to fig. 1 in combination with fig. 2 and 3, the embodiment of the present disclosure provides an AF motor for driving an optical device to have a clear imaging effect. Wherein the optics may comprise a lens part and a sensor part, the AF motor comprises a base 10, a carrier 20, an SMA actuation part 30 for driving the carrier 20 from a second side to a first side, a reset part for resetting the carrier 20 from the first side to the second side, and a guide support 50 for extending between the first side and the second side for supporting and guiding the carrier 20. One of the base 10 and the carrier 20 may be used for mounting a sensor portion and the other may be used for mounting a lens portion, for example, the sensor portion may be mounted on the base 10 and the lens portion may be mounted on the carrier 20. The guiding and supporting part 50 is used for supporting and guiding the carrier 20 to move along the space between the first side and the second side, so that the moving direction is accurate and the moving process is stable. The SMA actuator 30 is connected between the base 10 and the carrier 20 and is configured to contract when energized to move the carrier 20 from the second side to the first side. Referring to fig. 15, the reset portion includes a first magnetic member 41 disposed on the base 10 and a second magnetic member 42 disposed on the carrier 20, wherein one of the two magnetic members may be a magnet and the other may be a magnetic conductive sheet, or both of the two magnetic members may be magnets. The first magnetic member 41 and the second magnetic member 42 are disposed opposite to each other, and the second magnetic member 42 is disposed eccentrically toward the first side with respect to the first magnetic member 41, specifically, in the figure, the second magnetic member 42 is disposed eccentrically upward with respect to the first magnetic member 41, that is, the center of the second magnetic member 42 is closer to the first side than the center of the first magnetic member 41, so that the first magnetic member 41 can generate a downward magnetic attraction force on the second magnetic member 42, the downward magnetic attraction force is opposite to the upward magnetic attraction force of the SMA driving unit 30, when the AF motor operates, the SMA driving unit 30 overcomes the downward magnetic attraction force to drive the carrier 20 to move upward after being powered on, and after the AF motor operates, the SMA driving unit 30 is powered off, the downward magnetic attraction force of the reset unit drives the carrier 20 to return to the initial position to wait for the next driving operation. Here, the driving force to the first side of the carrier 20 can be adjusted by adjusting the magnitude of the current passed through the SMA drive unit 30, and the moving stroke and the moving direction of the carrier 20 can be controlled according to the difference between the driving force to the first side of the SMA drive unit 30 and the force to the second side of the reset unit. In other embodiments, the AF motor may further include a housing 100 covering the outer circumference of the base 10 for protecting the carrier 20 and performing the first-side movement stroke limitation.

Referring to fig. 16, the guiding support portion 50 may be disposed on the same side as the reset portion, that is, the first magnetic member 41 and the second magnetic member 42 may generate a magnetic attraction force toward each other, so that the carrier 20 has a tendency to abut against the guiding support portion 50, thereby the base 10 and the carrier 20 abut against the guiding support portion 50, so that the carrier 20 is stably moved. Here, referring to fig. 16, the first magnetic member 41 and the second magnetic member 42 may be provided in two sets, respectively, symmetrically disposed at one side of the AF motor.

Through the technical scheme, the AF motor in the embodiment of the disclosure realizes the movement of the carrier 20 to two directions by the magnetic attraction force of the SMA driving part 30 to the first side in cooperation with the reset part to the second side, simplifies the control process of the SMA driving part 30, and saves the control cost. In addition, two magnetic parts of the reset portion are eccentrically disposed, and the first magnetic part 41 always has a magnetic attraction force for magnetically attracting the second magnetic part 42 to the second side, so that the carrier 20 can have a tendency of approaching the base 10 toward the second side in a non-working state, and the carrier 20 is prevented from shaking. The guide support portion 50 can guide the fine movement direction of the carrier 20 by the magnetic attraction of the first magnetic member 41 and the second magnetic member 42 toward each other.

In the embodiment of the present disclosure, the magnetic attraction force of the first magnetic member 41 to the second magnetic member 42 toward the second side (i.e., the reset force of the carrier 20 toward the base 10) may be configured to be not less than the gravity of the moving part, wherein the moving part may include the carrier 20 and all devices for mounting on the carrier 20, such as, but not limited to, the second magnetic member 42, the lens part, and the first sliding shaft 53 and the third sliding shaft 55 described below. Set magnetic attraction to be not less than moving part gravity, can effectively overcome moving part's action of gravity, in the embodiment of this disclosure, can configure this restoring force into not less than moving part's gravity 1.5 times, when the striking of arbitrary direction takes place for the motor or when rocking, can guarantee that magnetic attraction can make carrier 20 near base 10 to the second side all the time to avoid the striking abnormal sound that probably takes place under the various conditions effectively, avoid spare part to damage, improve spare part life.

In one embodiment, referring to fig. 5, the SMA driving part 30 may include one SMA wire configured to be opened toward the first side in a V shape, two apexes of the V shape may be connected to the first and second protrusions 11 and 12 (the first and second protrusions 11 and 12 shown in fig. 2) at both ends of the susceptor 10, and a bottom of the V shape may be connected to the hook 22 in the middle of the carrier 20. Both ends of the SMA wire may be electrically connected through the conductive connection member 301 embedded in the boss of the base 10 and the base, respectively, to supply power to the SMA wire through the conductive connection member 301 by the power supply unit. Can be heated and take place the shrink after the SMA wire circular telegram, connect the SMA wire length between first bellying 11 and second bellying 12 promptly and can shorten, because the both ends of SMA wire are fixed, consequently hang and can overcome the downward magnetic attraction of restoring to the throne and move up in the V type bottom of hook portion 22 to drive carrier 20 upward movement. In the process of upward movement of the carrier 20, the included angle of the V-shaped structure becomes larger and larger until the included angle is 180 °, and the maximum stroke of the upward movement of the carrier 20 is reached, and in practical application, the movable range of the carrier 20 can be adjusted by adjusting the included angle of the V-shape according to the shrinkage of the SMA wire. The downward movement of the carrier 20 after the upward movement can be achieved by reducing the current flowing through the SMA wires to move the carrier 20 downward to a designated position under the magnetic attraction of the reset portion, or by de-energizing the SMA wires to restore the carrier 20 to the initial position under the action of the reset portion. The hook 22 may be arranged exactly in the middle of the first and second bosses 11, 12, so that the SMA wire is configured as a symmetrical structure, thereby ensuring that the movement of the carrier 20 remains balanced against deflection.

In one embodiment, referring to fig. 1, the SMA driving part 30 may include first and second SMA wires 31 and 32 connected between the base 10 and the carrier 20 and disposed at the same side, and referring to fig. 2 and 3, the first and second SMA wires 31 and 32 are respectively connected at two pairs of diagonal corners formed by the base 10 and the carrier 20 together at the respective sides, the side in fig. 3 where the first and second SMA wires 31 and 32 are disposed has four top corners in total, the first SMA wire 31 is connected between the upper left corner of the base 10 and the lower right corner of the carrier 20, and the second SMA wire 32 is connected between the lower left corner of the carrier 20 and the upper right corner of the base 10, so that the SMA wire may be disposed at the farthest position of the carrier 20 so that the length of the SMA wire may be sufficiently long. Specifically, the first SMA wire 31 is heated to contract when energized, pulling the carrier 20 from the lower right corner of the carrier 20, and the second SMA wire 32 is heated to contract when energized, pulling the carrier 20 from the lower left corner of the carrier 20, and the carrier 20 can be pulled upward at both ends of the bottom of the carrier 20 by the two SMA wires. The driving directions of the two SMA wires are the same, so that the directions and the magnitudes of currents for connecting the two SMA wires can be the same, the control process is simpler, and the control cost is reduced. In addition, the SMA driving part 30 is provided at a diagonal position on one side of the AF motor using two SMA wires, so that the SMA wires have a sufficient length to provide a large movement stroke, and the superposition of the two SMA wires can stabilize the movement of the carrier 20 without wobbling.

In one embodiment, referring to fig. 2, orthographic projections of the first and second SMA wires 31 and 32 toward the first side or the second side may be configured to be parallel to each other with a space to ensure that they do not interfere with each other. The two SMA wires may be symmetrically arranged to ensure that the movement of the carrier 20 does not deflect.

In the disclosed embodiment, the first SMA wire 31 and the second SMA wire 32 may be the same size. So that the pulling force of the first SMA wire 31 to the lower right corner of the carrier 20 is the same as the pulling force of the second SMA wire 32 to the lower left corner of the carrier 20, thereby ensuring that the carrier 20 does not have deflection or blocking.

Referring to fig. 2 and 3, the first SMA wire 31 may be connected to the first boss 11 on the base 10 by a first jaw 311 to be fixed relative to the base 10, and connected to the mounting tab 21 on the carrier 20 by a second jaw 312 to be fixed relative to the carrier 20, and the second SMA wire 32 may be connected to the second boss 12 on the base 10 by a third jaw 321 to be fixed relative to the base 10, and connected to the mounting tab 21 by a fourth jaw 322 to be fixed relative to the carrier 20. Wherein the first and second protrusions 11 and 12 are respectively disposed at both ends of the base 10, and the third and fourth clamping pieces 321 and 322 are respectively disposed at both ends of the mounting piece 21, thereby connecting the base 10 and the carrier 20 at diagonally opposite corners. The heights of the first protrusion 11 and the second protrusion 12 in the vertical direction may be the same, so that the heights of the first clip 311 and the second clip 312 in the vertical direction are the same, and similarly, the heights of the third clip 321 and the fourth clip 322 in the vertical direction are also the same, so that the forces of the first SMA wire 31 and the second SMA wire 32 on the carrier 20 are more balanced. Each clip can be a metal clip, and is used for fixedly clamping the SMA wire on one hand and conducting electricity on the other hand.

Specifically, referring to fig. 3, the first jaw 311 may be connected to a first conductive member 3111 embedded in the first boss 11, and the other end of the first conductive member 3111 may be electrically connected to the circuit board through a first pin 3112 to supply power to the first SMA wire. Similarly, the third clamping piece 321 may be connected to a second conductive member 3211 embedded in the second protruding portion 12, and the other end of the second conductive member 3211 may be electrically connected to the circuit board through the second pin 3212 to supply power to the second SMA wire 32.

Referring to fig. 2 and 16, third clip element 321 is disposed outside first clip element 311 with respect to carrier 20, and third clip element 321 is on the underside of first clip element 311, for example, as shown in the drawing of fig. 2. The mounting tabs 21 (hidden in the carrier 20 in fig. 2) may include a first extension tab 211 extending outwardly of the carrier 20 at one end and a second extension tab 212 extending outwardly of the carrier 20 at the other end, the first extension tab 211 for mounting the second clamping tab 312 and the second extension tab 212 for mounting the fourth clamping tab 322, the extension length of the second extension tab 212 being longer than the extension length of the first extension tab 211 so that the SMA wires connected thereto may be spaced apart. Specifically, the difference between the lengths of the second extending piece 212 and the first extending piece 211 is equal to the difference between the distances of the third clamping piece 321 and the first clamping piece 311 in the up-down direction of the drawing of fig. 2, so that the two SMA wires can be parallel to each other without interfering with each other. The mounting piece 21 may be mounted by being embedded in the carrier 20.

In one embodiment, referring to fig. 4, the SMA actuator 30 may include one SMA wire hooked in an X shape, that is, one SMA wire wound in the same shape as the two SMA wires. The two ends of the base 10 may be provided with first and second mounting points which are flush (i.e., upper left and right mounting points for mounting the SMA actuator 30 in fig. 4), the two ends of the carrier 20 may be provided with third and fourth mounting points which are flush (i.e., lower left and right mounting points for mounting the SMA actuator 30 in fig. 4), as shown in the drawing, the first and third mounting points are configured as diagonal corners, the second and fourth mounting points are configured as diagonal corners, the SMA wires are connected to the first, third, fourth and second mounting points in sequence, and the SMA wires are short-circuited at the third and fourth mounting points, so that the same effect as the above two SMA wires can be achieved using one SMA wire, and thus the same advantageous effects can be obtained, and in particular, the above description will not be repeated.

In one embodiment, referring to fig. 1 and 16, the guide support 50 may include a first guide support 51 and a second guide support 52 disposed at both ends of the carrier 20 on the same side. Wherein, with reference to fig. 1, 5 to 16, the first guide supporting part 51 may include a slide shaft extending in the moving direction of the carrier 20 (i.e., the up-down direction of the AF motor) or a ball train arranged in the moving direction, and when the first guide supporting part 51 includes the ball train, it may be rollably disposed between the base 10 and the carrier 20; or it may be fixed to one of the base 10 and the carrier 20 and the other of the base 10 and the carrier 20 may slide on the ball train, i.e. relative to the ball train, with reference to fig. 10, a ball train of two balls is fixed to the base 10 and the carrier 20 slides relative to the ball train. The second guide supporting part 52 may include one of balls, a sliding shaft extending in the moving direction, and a ball row arranged in the moving direction, and when the second guide supporting part 52 includes a ball or a ball row, it may be rollably disposed between the base 10 and the carrier 20, or it may be fixed to one of the base 10 and the carrier 20, and the other of the base 10 and the carrier 20 may slide on the ball or the ball row, i.e., slide relative to the ball or the ball row, and referring to fig. 13 and 14, one ball or a ball row of two balls is fixed to the base 10, and the carrier 20 slides relative to the ball or the ball row. For example, the first guide support 51 and the second guide support 52 may be any combination of the above forms, which are not described herein. When the guide support 50 includes balls or ball rows, the following advantages are provided: the balls are in point contact with the carrier 20 and the base 10, and rolling friction force is generated when the carrier 20 moves, so that great resistance is not generated on the movement of the carrier 20, and the AF motor has great driving force to adapt to a module with a large lens part.

In one embodiment, referring to fig. 7 and 8, the first guide support 51 may be supported by the first V-groove 23 formed on the carrier 20 and the second V-groove 13 formed on the base 10, i.e., the first guide support 51 is held by two V-grooves disposed at opposite sides, in other embodiments, the sliding shaft of the first guide support 51 may be held by an arc-shaped groove matching thereto and held by a V-groove (as shown in fig. 9), and the ball row may be held by a direction groove matching each ball and held by a V-groove (as shown in fig. 10). Referring to fig. 8, the second guide supporting part 52 may be supported by the square groove 15 capable of receiving the second guide supporting part 52 and the plane of the carrier 20 formed on the base 10, for example, when the second guide supporting part 52 is a ball row or a slide shaft, the square groove 15 may be a groove having a U-shaped cross-sectional configuration extending in the same direction as that, and when the second guide supporting part 52 is one or several balls, the square groove 15 may be a groove having only one side opened to be capable of receiving the balls. When the second guide supporting part 52 includes a slide shaft extending in the moving direction or a ball row arranged in the moving direction, referring to fig. 6 and 7, the second guide supporting part 52 may be supported by the third V-groove 14 formed on the base 10 and the plane of the carrier 20, and in this embodiment, the outer circumferential surface of the first guide supporting part 51 is tangent to the inclined surfaces of the two V-grooves disposed at opposite sides, thereby ensuring that the extending direction of the row of guide supporting parts 50 is unique and stable. The second guide supporting part 52 may have an outer circumferential surface at one side tangent to the V-shaped groove and the other side contacting only a flat surface to perform a supporting function. In this way, one of the two sets of guiding and supporting parts is used for guiding and the other set is used for supporting, and the requirement of stable movement of the carrier 20 is met. In other embodiments, both sets of guide supports may be held by opposing V-grooves. In other embodiments, referring to fig. 11, the sliding shaft of the second guiding and supporting portion 52 may be fixed by an arc-shaped slot matching with the sliding shaft and may be slidably supported by a protrusion protruding from the carrier 20; referring to fig. 12, the ball row of the second guide and support portion 52 may be supported by a groove-shaped structure having a flat groove bottom at the opposite side of the V-groove support.

In another embodiment, referring to fig. 1 and 16, the first guide support 51 may be supported by two first slide shafts 53 arranged side by side on the carrier 20 and two second slide shafts 54 arranged side by side on the base 10, and when the second guide support 52 includes slide shafts or ball rows, the second guide support 52 may be supported by two third slide shafts 55 arranged side by side on the base 10 and the plane of the carrier 20. That is, in this embodiment, the V-shaped groove formed integrally with the base 10 or the carrier 20 described above is replaced by two slide shafts arranged side by side. Here, it should be noted that the V-shaped groove formed by the two parallel sliding shafts is similar to a V shape as long as the guide support portion 50 is ensured to be tangent thereto. The distance between the two sliding shafts can be set, and the distance is not larger than the diameter of the ball or sliding shaft of the guide support part 50, so that the guide support part 50 can fall between the two sliding shafts as far as possible to prevent the sliding shafts from separating, and the phenomenon that the sliding shafts cannot support and guide due to the fact that all the sliding shafts fall between the two sliding shafts is avoided. Wherein the slide shafts may be fixed to the respective bases 10 or carriers 20 by means of bonding or the like. The slide shaft is supported by a metal material, the hardness of the metal material is high, the friction force is low when the slide shaft is in contact with the metal guide supporting part 50, and compared with the mode of integrally forming the V-shaped groove, the slide shaft mode avoids indentation of the V-shaped groove when the guide supporting part 50 is a ball or a ball row.

In an embodiment, referring to fig. 15 and 16, the AF motor may further include a position sensor 62 for detecting the relative position of the base 10 and the carrier 20, the position sensor 62 is electrically connected to the power supply element, for example, the circuit board 63, and can feed back the detected position information to the control circuit, so as to control the power on/off of the SMA driving part 30, and realize the closed-loop control of the driving process of the AF motor. Wherein the position sensor 62 may comprise a magnetic field sensor (e.g., a hall sensor), an electric field sensor (e.g., a capacitive sensor), or an electro-optical position sensor, among others.

When the position sensor 62 is a magnetic field sensor, the position sensor 62 may be provided on one of the carrier 20 and the base 10, and the other may be provided with a magnet 61 facing the magnetic field sensor, as shown in fig. 15 and 16. The position sensor 62 is used for sensing position information of the magnet 61, and the position sensor 62 is electrically connected to the circuit board 63.

For example, in the embodiment of the present disclosure, when the magnet 61 is disposed on the carrier 20, the magnet 61 may be shared with the second magnetic member 42, so as to perform two different functions, avoid separately disposing the magnet 61 and increasing the number of components, and avoid magnetic interference between the magnet 61 and the second magnetic member. The position sensor 62 recognizes the moving position of the carrier 20 with respect to the base 10 by sensing the magnetic flux of the magnet 61, thereby performing closed-loop control of the driving process of the AF motor. Here, the position sensor 62 may be a hall sensor, and the magnet 61 may be a hall magnet. In one embodiment of the present disclosure, the position sensor 62 may be disposed on the base 10, and the magnet 61 may be disposed on the carrier 20, so that the electrical connection of the position sensor 62 is stable. In the embodiment of the present disclosure, the electrical devices may be all disposed on the fixed base 10, so as to ensure reliable connection of the electrical devices, and avoid the occurrence of a short circuit condition from affecting the usability of the AF motor.

According to a second aspect of the embodiment of the present disclosure, referring to fig. 17, there is also provided an image pickup module 3, which includes an optical device 2 and an AF motor 1, wherein the AF motor 1 is the above-mentioned AF motor. The camera module 3 has all the advantages of the AF motor, which will not be described herein.

According to a third aspect of the embodiment of the present disclosure, referring to fig. 18, an electronic device 4 is provided, which includes the above-mentioned camera module 3, and has all the beneficial effects of the above-mentioned camera module 3, and details are not repeated here. The electronic device 4 may be a mobile phone, a computer, a tablet computer, a watch, a monitoring device, an AR device, or other devices with an imaging function.

The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details in the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the above embodiments, the various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations will not be further described in the present disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (16)

1. An AF motor, characterized by comprising a base, a carrier, an SMA driving part for driving the carrier to move from a second side to a first side, a resetting part for resetting the carrier from the first side to the second side, and a guiding and supporting part for extending between the first side and the second side to support and guide the carrier, wherein the SMA driving part is connected between the base and the carrier and configured to be contracted after being electrified to drive the carrier to move from the second side to the first side, the resetting part comprises a first magnetic part arranged on the base and a second magnetic part arranged on the carrier, the first magnetic part and the second magnetic part are arranged oppositely, the second magnetic part is eccentrically arranged towards the first side relative to the first magnetic part, and the guiding and supporting part is arranged on the same side as the resetting part so as to enable the base and the carrier to be tightly attached to the guiding and supporting part through magnetic attraction force generated between the first magnetic part and the second magnetic part and towards each other.

2. The AF motor of claim 1, wherein the magnetic attraction force of the first magnetic member to the second magnetic member toward the second side is configured to be not less than the gravity of the moving portion, and the moving portion includes a carrier and a means for mounting on the carrier.

3. The AF motor of claim 1, wherein the SMA drive comprises a piece of SMA wire configured as a V-shape open to the first side, the two apexes of the V-shape being connected to first and second bosses on either end of the base, and the bottom of the V-shape being connected to a hook in the middle of the carrier.

4. The AF motor of claim 1, wherein the SMA drive section comprises first and second SMA wires disposed on the same side, the first and second SMA wires being connected at two diagonal pairs of angles formed by the base and carrier together on respective sides, respectively.

5. The AF motor of claim 4, wherein orthographic projections of the first and second SMA wires toward the first or second side are configured to be parallel to each other with a spacing, and the first and second SMA wires are the same size.

6. The AF motor of claim 4, wherein the first SMA wire is connected to a first boss on the base by a first clip and to a mounting tab on the carrier by a second clip, the second SMA wire is connected to a second boss on the base by a third clip and to the mounting tab by a fourth clip, the first boss and the second boss are disposed at two ends of the base, respectively, and the third clip and the fourth clip are disposed at two ends of the mounting tab, respectively.

7. The AF motor of claim 6, wherein the third clip is disposed outside the first clip with respect to the carrier, and the mounting tabs include a first extension tab extending outward of the carrier at one end for mounting the second clip and a second extension tab extending outward of the carrier at the other end for mounting the fourth clip, the second extension tab having a longer extension length than the first extension tab.

8. The AF motor of claim 1, wherein the SMA drive comprises one SMA wire hooked into an X-shape, the base is provided at two ends with first and second mounting points that are level, the carrier is provided at two ends with third and fourth mounting points that are level, the first mounting point is configured as a diagonal, the second mounting point is configured as a diagonal, the fourth mounting point is configured as a diagonal, the SMA wire is sequentially connected to the first mounting point, the third mounting point, the fourth mounting point and the second mounting point, and the SMA wire is in the third mounting point and the fourth mounting point are short-circuited.

9. The AF motor of claim 1, wherein the guide support part includes a first guide support part and a second guide support part that are provided at both ends of the same side of the carrier,

the first guide support part comprises a sliding shaft extending along the moving direction of the carrier or a ball row arranged along the moving direction, when the first guide support part comprises the ball row, the first guide support part can be arranged between the base and the carrier in a rolling way, or the first guide support part is fixed on the base or the carrier,

the second guide support portion includes one of balls, a slide shaft extending in the moving direction, and a ball row arranged in the moving direction, and when the second guide support portion includes the balls or the ball row, the second guide support portion is rollably disposed between the base and the carrier, or the second guide support portion is fixed to the base or the carrier.

10. The AF motor of claim 9, wherein the first guide support is supported by a first V-groove formed on the carrier and a second V-groove formed on the base,

the second guide support part is supported by a square groove formed on the base and capable of accommodating the second guide support part and a plane of the carrier; or

When the second guide support portion includes a slide shaft extending in the moving direction or a ball row arranged in the moving direction, the second guide support portion is supported by a third V-groove formed on the base and a plane of the carrier.

11. The AF motor of claim 9, wherein the first guide support portion is supported by two first slide shafts arranged side by side on the carrier and two second slide shafts arranged side by side on the base, and when the second guide support portion includes a slide shaft extending in the moving direction or a ball row arranged in the moving direction, the second guide support portion is supported by two third slide shafts arranged side by side on the base and a plane of the carrier.

12. The AF motor of claim 1, further comprising a position sensor for detecting a relative position of the base and the carrier, the position sensor being electrically connected to a power supply element, wherein the position sensor comprises a magnetic field sensor, an electric field sensor, or a photoelectric position sensor.

13. The AF motor of claim 12, wherein the position sensor comprises a magnetic field sensor disposed on one of the carrier and the base, the other of the carrier and the base being provided with a magnet directly opposite the magnetic field sensor, the position sensor being capable of sensing position information of the magnet.

14. The AF motor of claim 13, wherein the magnet is configured as the first magnetic member or the second magnetic member.

15. A camera module characterized by comprising an optical device and an AF motor according to any one of claims 1 to 14.

16. An electronic apparatus characterized by comprising the camera module according to claim 15.

Images