CN214174722U - Automatic focusing motor - Google Patents

Abstract

The present disclosure relates to an auto focus motor, comprising: a fixed part; a moving part movably mounted to the fixed part, wherein one of the fixed part and the moving part is provided with a coil, and the other is provided with a magnet capable of generating electromagnetic induction with the coil so as to drive the moving part to move relative to the fixed part; and the supporting part is arranged between the moving part and the fixing part in a contact manner, wherein the number of the magnets is multiple, one side of the coil, which is far away from the magnets, is provided with a magnetic part, the number of the magnetic parts is multiple, each magnetic part corresponds to one magnet respectively, and the magnetic attraction force generated by the magnetic parts and the magnets is configured to enable the moving part to have a rotation trend so that the supporting part is pressed between the fixing part and the moving part. The magnetic attraction enables the moving part to generate a rotation trend, the supporting part is pressed against the moving part, the stability of the moving process of the moving part is guaranteed, and the optical imaging effect is improved. The magnetic part can also restrict the direction of magnetic force lines and concentrate the distribution of magnetic beams, thereby improving the utilization rate of a magnetic field and saving energy consumption.

Description

Automatic focusing motor

Technical Field

The present disclosure relates to the field of optical technology, and in particular, to an auto-focus motor.

Background

The optical system is a system for imaging or optical information processing, and can be applied in various fields, such as a camera of a mobile phone, a camera or a lens of a projection technology, and as the application of the optical system is more extensive, a user more seeks an optical system with high imaging definition, and for this reason, the application of the auto-focusing function is favored by consumers. In the related art, a spring-suspended lens structure is usually adopted to drive a lens to move so as to realize automatic focusing, but the spring structure causes the optical axis of the lens to deflect in the moving process, so that a shot image or video shakes, and the imaging quality of an optical imaging system is affected. In addition, the energy consumption of the structure adopting the spring suspension is high, and the system is easy to resonate when closed-loop control is applied, so that the control is difficult.

SUMMERY OF THE UTILITY MODEL

An object of the present disclosure is to provide an autofocus motor having high stability.

In order to achieve the above object, the present disclosure provides an auto focus motor including:

a fixed part;

a moving part movably mounted to the fixed part, wherein one of the fixed part and the moving part is provided with a coil, and the other is provided with a magnet capable of generating electromagnetic induction with the coil to drive the moving part to move relative to the fixed part; and

a support portion disposed in contact between the moving portion and the fixing portion,

wherein, the quantity of magnetite is a plurality of, keeping away from of coil one side of magnetite is provided with the magnetic part, the quantity of magnetic part is a plurality of, every the magnetic part corresponds to one respectively the magnetite, the magnetic part with the produced magnetic attraction of magnetite disposes and to make the motion portion has the trend of rotating, so that the supporting part is supported and is pressed the fixed part with between the motion portion.

Optionally, the support portion includes at least one row of slide shafts extending in the optical axis direction of the optical device, and/or the support portion includes at least one row of a plurality of balls aligned in the optical axis direction of the optical device.

Optionally, the support portion comprises two rows of said balls, the two rows of said balls being disposed at opposite corners of the moving portion.

Optionally, the number of the magnetic members is two, and the two magnetic members are disposed at opposite sides of the moving portion or the fixed portion and are arranged in a staggered manner.

Optionally, the two magnetic members are the same size, and are symmetrically arranged about the center of the moving part.

Optionally, the magnetic members include two first magnetic members disposed opposite to each other and staggered, and two second magnetic members disposed opposite to each other and staggered, where the first magnetic members are disposed adjacent to the second magnetic members.

Optionally, the magnetism spare includes two offsides setting and the first magnetism spare of staggered arrangement and two offsides setting and the second magnetism spare of staggered arrangement, one first magnetism spare and one second magnetism spare homonymy sets up, just the magnetic attraction that first magnetism spare and magnetite produced with the magnetic attraction that second magnetism spare and magnetite produced is different.

Optionally, the number of the magnets is two, and the two magnets are arranged on opposite sides of the fixed portion or the moving portion and are arranged in a staggered manner.

Optionally, the magnet is disposed on the fixing portion, the coil and the magnetic member are disposed on the moving portion, the coil is wound in a circumferential direction of the moving portion, and the auto-focusing motor further includes a power supply line disposed on the fixing portion and a flexible power supply structure for connecting the coil and the power supply line.

Optionally, the autofocus motor further includes a power line provided on the fixed portion, a position sensor provided on the power line, and a sensing device provided on the moving portion corresponding to a position of the position sensor.

Through the technical scheme, this disclosed embodiment produces magnetic attraction through setting up a plurality of magnetic part and magnetite cooperation, acts on the different positions of motion portion through magnetic attraction and makes motion portion have the rotation trend to make motion portion can support to the supporting part that the contact set up between motion portion and fixed part and press, make motion portion can be near the supporting part in the motion process, and then guarantee that the motion process of motion portion is stable, effectively improve the optical imaging effect. In addition, the magnetic part can restrict the direction of magnetic force lines, concentrate the distribution of magnetic beams and avoid magnetic leakage, thereby improving the utilization rate of a magnetic field and saving energy consumption.

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 without limiting the disclosure. In the drawings:

fig. 1 is a schematic structural diagram of an autofocus motor according to an exemplary embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of an autofocus motor according to another exemplary embodiment of the present disclosure;

FIG. 3 is a schematic diagram of an autofocus motor according to yet another exemplary embodiment of the present disclosure;

FIG. 4 is a schematic diagram of an autofocus motor according to yet another exemplary embodiment of the present disclosure;

FIG. 5 is a schematic diagram of an autofocus motor according to yet another exemplary embodiment of the present disclosure;

fig. 6 is an exploded view of an autofocus motor provided in an exemplary embodiment of the present disclosure.

Description of the reference numerals

10-fixed part, 20-moving part, 31-coil, 32-magnet, 40-supporting part, 50-magnetic part, 51-first magnetic part, 52-second magnetic part, 6-power-on circuit, 7-flexible power supply structure, 8-position sensor and 9-induction device.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with 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, unless otherwise specified, the use of directional terms such as "upper, lower, left, and right" is defined according to the direction of the drawing, and "inner" and "outer" are defined with respect to the self-profile of the corresponding component. Terms such as "first," "second," and the like, used in this disclosure are intended to distinguish one element from another, without order or importance. Further, in the following description, when referring to the figures, the same reference numbers in different figures denote the same or similar elements.

As shown in fig. 1 to 6, the present disclosure provides an auto-focus motor including a fixed part 10, a moving part 20 movably mounted to the fixed part 10, and a support part 40 contactingly disposed between the fixed part 10 and the moving part 20, the support part 40 for supporting the moving part 20 during movement. One of the fixed portion 10 and the moving portion 20 is provided with a coil 31, and the other is provided with a magnet 32 capable of generating electromagnetic induction with the coil 31 to drive the moving portion 20 to move relative to the fixed portion 10. Wherein, optical device installs in motion portion 20, drives optical device through motion portion 20 and moves along the optical axis direction and realize making a video recording the automatic focusing of module. The optical device may include a lens body portion for transmitting light, for example, may include a lens, a lens barrel mounting the lens, and a barrel base mounting the lens barrel, and a sensor portion for receiving light, for example, may include a filter and a sensor chip that are glued together, at least one of the lens body portion and the sensor portion being mounted on the moving part 20. The number of the magnets 32 may be multiple, a magnetic member 50 is disposed on a side of the coil 31 away from the magnets 32, the number of the magnetic members 50 may be multiple, each magnetic member 50 corresponds to one magnet 32, where the correspondence refers to that the magnet 32 is disposed on a side where the magnetic member 50 is disposed, so that the magnetic member 50 can cooperate with the magnet 32, and magnetic attraction force generated by the magnetic member 50 and the magnet 32 is configured to make the moving portion 20 have a rotation tendency, so that the supporting portion 40 is pressed between the fixing portion 10 and the moving portion 20. It is understood that the number of magnets 32 may be equal to or greater than the number of magnetic members 50, for example, when the number of magnetic members 50 is two, the number of magnets 32 may be two, three, or more. It should be noted that the rotation tendency of the moving portion 20 means that the moving portion 20 has a rotation tendency in a plane perpendicular to the optical axis direction of the optical device, and may be a rotation tendency in a case where the moving portion 20 is not displaced in the plane, or a rotation tendency in a case where the moving portion 20 is displaced in the plane, as long as the rotation tendency is satisfied to realize the pressing against the supporting portion 40. The outer contour of the moving part 20 in the embodiment of the present disclosure may have various shapes, such as a circular structure, a polygonal structure, or other irregular shapes, and when the outer contour is a circular structure, the magnetic element 50 and the magnet 32 may be arranged such that the moving part 20 generates a rotation tendency and at the same time generates a deviation in a plane perpendicular to the optical axis direction of the optical device, so that the moving part 20 can generate a pressing force on the supporting part 40. When the outer contour of the moving portion 20 is a non-circular structure, the moving portion 20 can press the supporting portion 40 regardless of whether the moving portion has a tendency to rotate when the moving portion is displaced in a plane perpendicular to the optical axis direction of the optical device or when the moving portion does not have a tendency to rotate when the moving portion is displaced.

Through the technical scheme, this disclosed embodiment produces magnetic attraction through setting up a plurality of magnetic part 50 and the cooperation of magnetite 32, act on the different positions of motion portion 20 through magnetic attraction and make motion portion 20 produce the trend of rotating, so that motion portion 20 can produce the supporting part 40 that the contact set up between motion portion 20 and fixed part 10 and support, make motion portion 20 can be near supporting part 40 in the motion process, and then guarantee that the motion process of motion portion 20 is stable, effectively improve the optical imaging effect. In addition, the magnetic member 50 also restrains the direction of the magnetic force lines, concentrates the distribution of the magnetic beams, and avoids magnetic leakage, thereby improving the utilization rate of the magnetic field and saving energy consumption.

In one embodiment of the present disclosure, the support portion 40 may include at least one row of slide shafts extending in the optical axis direction of the optical device. If one row of slide shafts is included, the slide shafts may be disposed at a middle position of one side wall of the moving part 20, and if two rows of slide shafts are included, the slide shafts may be symmetrically disposed at opposite side walls or adjacent side walls of the moving part 20. In other embodiments, the number of the sliding shafts may be three, four, or more, which are uniformly distributed on the outer circumference of the moving part 20. Through setting up the slide axle structure, at the in-process of motor drive optical device auto focus, motion part 20 can be along slide axle rectilinear movement for optical device's motion is more steady, has higher motion precision, guarantees that optical device's optical axis can not take place the beat, improves the definition of formation of image.

In another embodiment of the present disclosure, the supporting part 40 may include at least one row of a plurality of balls aligned in an optical axis direction of the optical device. The sliding shaft structure is replaced by the balls arranged in rows, so that under the condition of ensuring the same function as the sliding shaft, the sliding friction of the sliding shaft can be replaced by the rolling friction of the balls, the friction coefficient is reduced, and the resistance to the moving part 20 is reduced. Here, for example, three balls may be provided in each row, and the balls may be sequentially arranged tangentially to each other, and the arrangement of the balls in each row may be the same as that of the slide shaft described above. In practical applications, a combination of a slide shaft and a ball may also be adopted, such as a row of slide shafts plus a row of balls.

In the embodiment of the present disclosure, referring to fig. 1 and 2, the support portion 40 may include two rows of balls, two rows of sliding shafts, or one row of balls and one sliding shaft. Taking the example of two rows of balls, two rows of balls may be provided at the diagonal of the moving part 20, i.e. in the direction of the drawing in fig. 1, one row of balls is provided at the lower left corner and the other row of balls is provided at the upper right corner. By providing the support portions at opposite corners, when the moving portion 20 tends to rotate, both support portions can be pressed simultaneously against both.

When two rows of balls are included as described above, one row of balls may serve as guide balls for guiding the moving part 20 to move in the optical axis direction, and the other row of balls may serve as support balls which may support the moving part 20 in cooperation with the guide balls, so that the moving process of the moving part 20 is more stable. Specifically, the supporting and guiding function of the balls may be achieved according to the way they are in contact with the fixed part 10 and the moving part 20. In a state of being developed, referring to fig. 1, V-shaped grooves are respectively formed on opposite sides of the moving portion 20, while one side of the fixing portion 10 is formed with a V-shaped groove, and the opposite side is configured with a groove-shaped structure in which a groove bottom is a plane, one row of balls (i.e., the upper right ball in fig. 1) is pressed between one V-shaped groove of the moving portion 20 and the V-shaped groove of the fixing portion, and the other row of balls (i.e., the lower left ball in fig. 1) is accommodated between the other V-shaped groove of the moving portion and the groove bottom of the groove-shaped structure of the fixing portion. It should be noted that the opposite sides in this document refer to two sides symmetrical with respect to a chain line in the drawing, and the upper and lower sides in the drawing direction in fig. 1 are one opposite side of the moving portion 20, and the left and right sides are the other opposite side of the moving portion 20. In fig. 1, the balls in the upper right corner are tangent to the side walls of the two V-grooves, i.e. in two lines with the fixed part 10 and the moving part 20, respectively, so as to ensure that the balls can always be held between the two V-grooves, whereby the balls can play a role in guiding the moving part 20. In fig. 1, the balls at the lower left corner are tangent to the V-shaped groove of the moving part 20, so that the balls can be always supported in the V-shaped groove, and the bottoms of the plane grooves of the groove structures of the plurality of balls and the fixed part form multi-point contact on a line, so that the contact area between the balls and the fixed part can be reduced while the supporting effect is achieved, and the frictional resistance is reduced. In other embodiments, the number of rows of balls may be three, four, five, etc., for example, four rows of balls may be provided in fig. 3, and eight rows of balls may be provided in fig. 4, in which case, the multiple rows of balls may be all provided as support balls, which can achieve the supporting and guiding functions and reduce friction, or one of the rows may be provided as guide balls, and the other rows of balls may be provided as support balls.

According to an embodiment of the present disclosure, referring to fig. 1 to 3, the number of the magnetic members 50 may be two, and the two magnetic members 50 are disposed at opposite sides of the moving part 20 or the fixed part 10 and are arranged in a staggered manner. As in the embodiment of fig. 1, the upper right half of the moving part 20 in the drawing of fig. 1 receives the upward magnetic attraction force generated by the magnet 32 to the magnetic member 50, and the lower left half receives the downward magnetic attraction force generated by the magnet 32 to the magnetic member 50, where the two magnetic members 50 are arranged in a staggered manner, so that the generated two magnetic attraction forces are also distributed on two sides of the central axis (the vertical dotted line in the drawing) of the moving part 20, so that the moving part 20 tends to rotate counterclockwise, and the supporting part 40 is pressed. In the embodiment of fig. 2, the magnet 32 on the left side in the drawing of fig. 2 generates a magnetic attraction force to the magnetic member 50 on the left side, and the magnet 32 on the right side in the drawing of fig. 2 generates a magnetic attraction force to the magnetic member 50 on the right side, where the two magnetic members 50 are arranged in a vertically staggered manner, so that the two generated magnetic attraction forces are also distributed on two sides of the central axis (the dash-dotted line in the left-right direction in the drawing) of the moving part 20, so that the moving part 20 tends to rotate counterclockwise, and the supporting part 40 is pressed. In the embodiment of fig. 3, the position and principle of the magnetic member 50 are similar to those of fig. 1, except that the supporting portions 40 in fig. 3 are four rows, and the four rows of supporting portions are respectively disposed at one side of the moving portion 20. Here, the support portions 40 are provided in two rows in fig. 1 and 2, the support portions 40 in two rows in fig. 1 are respectively provided on the side of the moving portion 20 where the magnetic member 50 is provided, and the support portions 40 in two rows in fig. 2 are respectively provided on the adjacent side of the moving portion 20 where the magnetic member is provided. It should be noted here that the direction in which the moving part 20 generates the trend of rotation is not limited to the counterclockwise direction described above, and the moving part 20 may generate the trend of clockwise rotation by adjusting the arrangement position of the magnetic member 50, and the counterclockwise direction is only taken as an exemplary illustration here.

Further, the two magnetic members 50 arranged offset on opposite sides may be the same in size, and the two magnetic members 50 are arranged symmetrically about the center of the moving part 20. Here, the central symmetry with respect to the moving part 20 means that the two magnetic members 50 are respectively disposed on opposite sides of the moving part 20 and symmetrically distributed on the left and right sides of the dotted line in the vertical direction in the drawing of fig. 1. The two magnetic pieces 50 are arranged in the same and symmetrical size, so that the magnetic attraction force borne by the moving part 20 on the opposite side is the same and symmetrical, and the moving part 20 is prevented from generating position deviation in a plane shown in the drawing while generating a rotation trend to influence the imaging effect.

Referring to fig. 4, in one embodiment, the magnetic member 50 may include two opposite first magnetic members 51 disposed and staggered and two opposite second magnetic members 52 disposed and staggered, and the first magnetic members 51 are disposed adjacent to the second magnetic members 52. The upside right half of motion portion 20 in the drawing of fig. 4 receives the ascending magnetic attraction that first magnetism spare 51 and magnetite 32 produced, the downside left half receives the downward magnetic attraction that first magnetism spare 51 and magnetite 32 produced, the left side upper half receives the magnetic attraction left that second magnetism spare 52 and magnetite 32 produced, the right side lower half receives the magnetic attraction right of second magnetism spare 52 and magnetite 32, the different positions of the different magnetic attraction in four directions effect in motion portion 20, make motion portion 20 can produce the trend of anticlockwise rotation, through setting up four magnetism spares, can increase moment of rotation, be more convenient for motion portion 20 to support and press on supporting part 40. In this embodiment, the driving force of the motor can be effectively increased by providing the coils 31 and the magnets 32 on all the four sides of the moving portion 20. In this embodiment, in combination with the arrangement of the supporting portions 40, the supporting portions 40 may be disposed at positions close to the corners of each adjacent two sides of the moving portion 20, that is, two rows of supporting portions 40 are disposed at each corner, and eight rows of supporting portions 40 are disposed, and based on the application of the four magnetic members, the moving portion 20 may be driven to generate a rotation tendency to press on at least one supporting portion 40 at each corner, thereby ensuring that all four corners of the moving portion 20 are reliably supported.

Referring to fig. 5, in an embodiment, the magnetic member 50 may include two first magnetic members 51 disposed opposite to each other and arranged in a staggered manner and two second magnetic members 52 disposed opposite to each other and arranged in a staggered manner, and unlike fig. 4, in this embodiment, one first magnetic member 51 is disposed on the same side as one second magnetic member 52, that is, as shown in fig. 5, one first magnetic member 51 and one second magnetic member 52 are disposed above and below the moving portion 20 in the direction of the drawing plane, and above, the first magnetic member 51 is on the right, the second magnetic member 52 is on the left, below, the first magnetic member 51 is on the left, and the second magnetic member 52 is on the right. Further, the magnetic attraction force generated by the first magnetic member 51 and the magnet 32 is different from the magnetic attraction force generated by the second magnetic member 52 and the magnet 32, and for example, the magnetic attraction force generated by the first magnetic member 51 and the magnet 32 may be made larger than the magnetic attraction force generated by the second magnetic member 52 and the magnet 32 by setting the size of the first magnetic member 51 and the magnet 32 corresponding thereto to be larger than the size of the second magnetic member 52 and the magnet 32 corresponding thereto. Like this, can play better bundle magnetism effect through setting up a plurality of magnetic parts, improve the magnetic field utilization ratio, simultaneously because the magnetic part sets up in the left and right sides of motion portion 20, the magnetic attraction that second magnetic part 52 produced can be offset the part by first magnetic part 51, and the part that first magnetic part 51 was not offset can drive motion portion 20 and produce the trend of rotating to support the pressure supporting part 40.

In the above embodiments, in order to make the moving part 20 rotate under the action of the magnetic attraction force, the magnetic member 50 is arranged at different positions, and in these embodiments, the position of the magnet 32 is not limited, for example, the magnet 32 may be opposite to the position of the magnetic member 50, or the magnet 32 may be set to be larger than the size of the magnetic member 50. According to an embodiment of the present disclosure, in addition to arranging the magnetic members 50 in the above-described manner, it is also possible to realize by laying out the positions of the magnets 32. For example, when the number of the magnets 32 is two, and accordingly, the number of the magnetic members 50 is two, and the two magnets 32 correspond to the magnets 32, the two magnets 32 may be disposed on opposite sides of the fixed portion 10 or the moving portion 20 and arranged in a staggered manner, in this case, the magnetic members 50 may be disposed in the same manner as the magnets 32, that is, in a staggered manner, and the magnetic members 50 may be disposed at the central positions in a facing manner, as long as at least a part of the magnetic members 50 is overlapped with the magnets 32. In the embodiment of the present disclosure, there are various ways of laying out the supporting portion 40 and the way of making the moving portion 20 generate the rotation tendency, which are only exemplified herein, and besides the listed embodiments, other embodiments that can achieve the corresponding effects by any combination can be adopted, and the above embodiments do not limit the present disclosure.

In the embodiment of the present disclosure, one of the coil 31 and the magnet 32 is provided on the fixed portion 10, and the other is provided on the moving portion 20, so that the moving portion 20 can move relative to the fixed portion 10. For example, the magnet 32 may be provided on the fixed portion 10, and the coil 31 and the magnetic member 50 may be provided on the moving portion 20, and the coil may be light in weight, so that the inertia of the moving portion 20 may be small, thereby increasing the response speed of the motor. Specifically, the coil 31 may be wound in the circumferential direction of the moving portion 20, so that the driving force of the motor may be increased, and the force may be uniformly applied in the circumferential direction of the moving portion 20, so that the driving force of the motor is more balanced, and the center of the moving portion 20 is ensured to be closer to the geometric center of the motor. It is understood that the coil 31 and the magnetic member 50 may be provided in the fixed portion 10 and the magnet 32 may be provided in the moving portion 20.

In the embodiment in which the coil 31 is provided at the moving part 20, referring to fig. 6, the autofocus motor may further include a power feeding line 6 provided on the fixing part 10 and a flexible power feeding structure 7 for connecting the coil 31 with the power feeding line 6. When the coil 31 is wound around the moving portion 20, the flexible power feeding structure 7 may be disposed around the bottom of the moving portion 20 and electrically connected to the energizing line 6 through two connection terminals. The power supply of the coil 31 by the power line 6 can be realized through the flexible power supply structure 7 connection. Here, the copper electric line 6 may be a circuit board structure, or may be another circuit structure capable of supplying power to the coil 31. The flexible electrifying structure 7 can be a spring wire, and the spring wire can play a certain pre-pressing effect on the moving part 20 due to the elastic effect of the spring wire, so that the condition that the moving part 20 shakes to make abnormal sound can be improved.

In the embodiment of the present disclosure, as shown in fig. 6, the auto-focus motor may further include a position sensor 8 disposed on the power-on line 6 and a sensing device 9, such as a magnetic device, or more specifically, a hall magnet, disposed on the moving portion 20 and corresponding to the position of the position sensor 8, in addition to the power-on line 6 disposed on the fixed portion 10. The power line 6, the position sensor 8 and the sensing device 9 may constitute a closed-loop control system for controlling the movement of the moving portion 20, the position sensor 8 may determine a position signal of the moving portion 20 by detecting a position signal of the sensing device 9 and feed back the signal to the power line 6, and the power line 6 may energize the coil 31 to control the movement of the moving portion 20, wherein the power line 6 may be the aforementioned power line.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of 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 foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

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 (10)

1. An auto focus motor, comprising:

a fixed part (10);

a moving part (20) movably mounted to the fixed part (10), wherein one of the fixed part (10) and the moving part (20) is provided with a coil (31), and the other is provided with a magnet (32) capable of generating electromagnetic induction with the coil (31) to drive the moving part (20) to move relative to the fixed part (10); and

a support portion (40) disposed in contact between the moving portion (20) and the fixed portion (10),

the number of the magnets (32) is multiple, one side, far away from the magnets (32), of the coil (31) is provided with a magnetic part (50), the number of the magnetic parts (50) is multiple, each magnetic part (50) corresponds to one magnet (32), and magnetic attraction force generated by the magnetic parts (50) and the magnets (32) is configured to enable the moving part (20) to have a rotation trend so that the supporting part (40) is pressed between the fixing part (10) and the moving part (20).

2. Autofocus motor according to claim 1, characterized in that the support part (40) comprises at least one row of slide shafts extending in the direction of the optical axis of the optics and/or

The support portion (40) includes at least one row of a plurality of balls arranged in an optical axis direction of the optical device.

3. Autofocus motor according to claim 2, characterized in that the support (40) comprises two rows of balls, which are arranged at opposite corners of the moving part (20).

4. Autofocus motor according to any of claims 1 to 3, characterized in that the number of magnetic elements (50) is two, the two magnetic elements (50) being arranged on opposite sides of the moving part (20) or the fixed part (10) and offset.

5. The autofocus motor according to claim 4, wherein the two magnetic members (50) have the same size, and the two magnetic members (50) are arranged symmetrically with respect to the center of the moving part (20).

6. Autofocus motor according to any of claims 1 to 3, characterized in that the magnetic means (50) comprise two oppositely disposed and staggered first magnetic means (51) and two oppositely disposed and staggered second magnetic means (52), the first magnetic means (51) being disposed adjacent to the second magnetic means (52).

7. The autofocus motor according to any one of claims 1 to 3, wherein the magnetic member (50) includes two first magnetic members (51) disposed opposite to each other and arranged in a staggered manner and two second magnetic members (52) disposed opposite to each other and arranged in a staggered manner, one first magnetic member (51) is disposed on the same side as one second magnetic member (52), and the magnetic attraction force generated by the first magnetic member (51) and the magnet (32) is different from the magnetic attraction force generated by the second magnetic member (52) and the magnet (32).

8. The autofocus motor according to any one of claims 1 to 3, wherein the number of the magnets (32) is two, and the two magnets (32) are provided on opposite sides of the fixed portion (10) or the moving portion (20) and are arranged in a staggered manner.

9. The autofocus motor according to claim 1, wherein the magnet (32) is provided on the fixed portion (10), the coil (31) and the magnetic member (50) are provided on the moving portion (20), the coil (31) is wound around the moving portion (20) in the circumferential direction, and the autofocus motor further comprises a power supply line (6) provided on the fixed portion (10) and a flexible power supply structure (7) for connecting the coil (31) and the power supply line (6).

10. Autofocus motor according to claim 1, characterized in that it further comprises a current path (6) arranged on the fixed part (10), a position sensor (8) arranged on the current path (6) and a sensing means (9) arranged on the moving part (20) corresponding to the position of the position sensor (8).

Images