CN218850598U - Ball type voice coil motor and lens module - Google Patents

Abstract

The utility model belongs to the technical field of lens module, and discloses a ball type voice coil motor and a lens module; the ball type voice coil motor includes: the device comprises a magnetic element, a carrier, a ceramic roller, a base and a coil; the carrier and the base are cylinder-like parts, the carrier is movably embedded in the base, and the ceramic roller is movably arranged between the side wall of the carrier and the side wall of the base; the magnetic element and the coil are disposed on the carrier and the base, respectively. The utility model provides a ball formula voice coil motor and camera lens module can restrain the ball shake, improves and shoots the definition.

Description

Ball type voice coil motor and lens module

Technical Field

The utility model relates to a camera lens module technical field, in particular to ball formula voice coil motor and camera lens module.

Background

The mobile phone camera widely uses the voice coil motor to realize the automatic focusing function, and the position of the lens can be adjusted through the voice coil motor to present clear images. The ball type voice coil motor is provided with a carrier which can move relative to a base and is used for fixing a lens, balls are arranged between the base and the carrier to realize rolling support between the base and the carrier, so that the relative movement direction of the base and the carrier is kept in a set direction, and the posture deflection of the carrier is limited. The driving force of the ball type voice coil motor is from the magnetic field acting force of the magnet and the electrified coil, but the balls are mostly made of metal materials, and the magnetic conduction phenomenon is easy to occur in a magnetic field, so that the magnetic field acting force is adversely affected, and the driving operation of the motor is indirectly affected; the moving state of the ball can be influenced to a certain extent, and the smoothness of the relative movement of the carrier and the base is influenced. On the other hand, the ball is not corrosion resistant and wear resistant, which may cause the ball to be damaged and damage its regular form, thereby causing the defect of jitter in the operation of the motor, deteriorating the control quality, affecting the focus function and the definition of image shooting, and also affecting the service life of the motor itself.

SUMMERY OF THE UTILITY MODEL

The utility model provides a ball formula voice coil motor and camera lens module, it is poor to solve among the prior art ball formula voice coil motor ball easy magnetic conduction and corrosion-resistant ball motor shake control quality that leads to, and the technical problem of definition is shot to the degradation.

In order to solve the technical problem, the utility model provides a ball formula voice coil motor and camera lens module, ball formula voice coil motor includes:

the device comprises a magnetic element, a carrier, a ceramic roller, a base and a coil;

the carrier and the base are cylinder-like members, the carrier is movably arranged in the base, and the ceramic rollers are movably arranged between the side wall of the carrier and the side wall of the base;

the magnetic element and the coil are disposed on the carrier and the base, respectively.

Further, the coil is disposed on the base, and the magnetic element is disposed on the carrier; the magnetic element is glued to the upper part of the carrier, and the lower end of the carrier is placed on the supporting table.

Further, the coil is disposed on the carrier, and the magnetic element is disposed on the base;

the magnetic element is glued on the supporting table, the coil is wound on the upper portion of the carrier, and the lower end of the carrier is placed on the supporting table.

Further, the magnetic element is opposite to the coil.

Further, the magnetic element is a magnet.

Further, the ceramic roller is a ceramic flat roller.

Furthermore, a first guide groove is formed in the outer peripheral side wall of the carrier, a second guide groove opposite to the first guide groove is formed in the inner peripheral side wall of the base, and a notch of the first guide groove and a notch of the second guide groove are oppositely arranged;

the ceramic roller is arranged in the notch of the first guide groove and the second guide groove.

Furthermore, the circumferential wheel surface of the ceramic roller is in rolling contact with the notches of the first guide groove and the second guide groove which are opposite to each other on two sides.

Further, there is a difference in height between the magnetic element and the coil in the moving direction of the carrier.

The lens module includes: the lens is fixedly arranged on a carrier of the ball type voice coil motor.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

the ball formula voice coil motor and camera lens module that provide in the embodiment of this application, but through the ceramic gyro wheel setting between relative movement's carrier and base, utilize the corrosion-resistant and wear resistance of ceramic gyro wheel, can keep the regular form of ceramic gyro wheel, stable roll supports between carrier and base, thereby keeps relative movement's smooth nature to restrain ball formula voice coil motor's shake, improves and shoots the definition. On the other hand, the ceramic roller wheel with non-magnetic conductivity is utilized to overcome the influence of the magnetic field of the motor magnet on the ball and the reaction effect on the magnetic field of the magnet, and the focusing control quality of the voice coil motor is ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a ball-type voice coil motor according to an embodiment of the present invention;

FIG. 2 is a schematic view of the assembly of the ceramic roller of the ball-type voice coil motor of FIG. 1;

fig. 3 is a schematic structural diagram of a ceramic roller according to an embodiment of the present invention;

fig. 4 is a side view of a ceramic roller according to an embodiment of the present invention.

Detailed Description

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

It should be noted that all the directional indications in the embodiments of the present application are only used to explain the relative position relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

The following disclosure provides many different embodiments or examples for implementing different features of the application. To simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

The application is described below with reference to specific embodiments in conjunction with the following drawings.

The embodiment of the application provides a ball formula voice coil motor and camera lens module, solves among the prior art ball formula voice coil motor ball easily leads to the magnetic conduction and not corrosion-resistant ball motor shake control quality poor, and the technical problem of definition is shot in the degradation.

For better understanding of the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the present application, and it should be understood that the specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.

Referring to fig. 1, embodiments of the present application provide a ball-type voice coil motor, which suppresses the shake of the ball motor by improving the magnetic conductivity and excessive wear of the balls in the prior art, thereby improving the shooting clarity. The structural form of the ceramic roller and the matching structure of the ceramic roller, the carrier and the base can be further designed, the anti-shaking performance is enhanced, and the shooting definition is further improved.

As will be described in detail below.

Referring to fig. 1, the ball-type voice coil motor includes: carrier 10, magnetic element 20, ceramic roller 30, base 40, and coil 50.

Wherein the carrier 10 is used for fixing a lens, the carrier 10 and the base 40 can be arranged into a cylinder-like member, and the carrier 10 can be movably arranged in the base 40, so that the lens can be embedded in the carrier 10, and the movement of the lens can be realized by the movement of the carrier 10 relative to the base 40; and the ceramic roller 30 is movably disposed between the side wall of the carrier 10 and the side wall of the base 40, and the ceramic roller 30 is roll-supported between the carrier 10 and the base 40 so that a stable distance is maintained therebetween, and a stable movement in the relative movement direction of the carrier 10 and the base 40 is maintained, so as to realize a stable focusing operation of the ball-type voice coil motor. Meanwhile, due to the non-magnetic property of the ceramic roller 30, the influence of an electromagnetic field of the magnet and the electrified coil in the voice coil motor under the electrified condition is avoided, so that the magnetic conduction phenomenon is inhibited, and the moving smoothness of the ceramic roller 30 is ensured; meanwhile, the regular shape of the ceramic roller 30 is maintained in the long-time running process by using the corrosion resistance and the wear resistance of the ceramic roller 30, and the ceramic roller 30 is stably supported between the base 40 and the carrier 10 in a rolling manner, so that the problem that the carrier 10 vibrates in the moving process due to the irregular shape of the balls in the prior art is solved, the motor vibration is inhibited, and the shooting definition is improved.

Wherein the magnetic element 20 and the coil 50 are respectively disposed on the carrier 10 and the base 40, so that when the coil 50 is energized, an electromagnetic field is generated, and the magnetic element 20 interacts with the electromagnetic field to generate a repulsive force or an attractive force, thereby achieving a relative movement between the carrier 10 and the base 40. In some embodiments, the carrier 10 may be screwed to the lens, so that the carrier 10 drives the lens to move, thereby implementing the operation of adjusting the focal length of the lens by the motor.

It should be noted that the magnetic element 20 and the coil 50 are respectively fixed on the carrier 10 and the base 40, so that a relative repulsive force is generated after the power is turned on, and the relative movement between the two is completed; the specific fixing positions of the magnetic element 20 and the coil 50 can be set according to practical situations.

Generally, the coil 50 may be disposed on the base 40 and the magnetic element 20 may be disposed on the carrier 10.

For the convenience of fixing, the base 40 is provided at the bottom thereof with a support table on which the coil 50 is wound, the magnetic member 20 is glued to the upper portion of the carrier 10, and the lower end of the carrier 10 rests on the support table.

Alternatively, the coil 50 may be disposed on the carrier 10, the magnetic element 20 may be disposed on the base 40, a support table is disposed at the bottom of the base 40, the magnetic element 20 is glued on the support table, the coil 50 is wound on the upper portion of the carrier 10, and the lower end of the carrier 10 rests on the support table.

In order to make full use of the electromagnetic force, the magnetic element 20 may be aligned with the coil 50.

Generally, the magnetic element 20 may be a magnet; but may also be an electromagnet or the like.

Referring to fig. 2, 3 and 4, in order to further suppress the motor shake, the ceramic roller 30 may be configured as a ceramic flat roller, and the structural configuration of the ceramic roller 30 is configured as a flat roller, and the circumferential surface of the ceramic roller is in rolling contact with the outer surface of the carrier 10 and the inner surface of the base 40 on both sides, wherein the surface of the carrier 10 away from the lens is the outer surface and the surface of the base 40 close to the lens is the inner surface with the lens as the center, so that the rotation manner and posture of the balls are limited by the flat configuration, the relative movement posture between the carrier 10 and the base 40 is kept stable, and the motor shake influence is reduced.

In order to further limit the posture of the relative movement between the carrier 10 and the base 40 and avoid the relative shaking, a first guide groove 11 is arranged on the outer peripheral side wall of the carrier 10, a second guide groove 41 opposite to the first guide groove 11 is arranged on the inner peripheral side wall of the base 40, and the notch of the first guide groove 11 is opposite to the notch of the second guide groove 41; the ceramic flat roller is arranged in the first guide groove 11 and the second guide groove 41, and the flat roller is stably rotated in the grooves through the matching of the first guide groove 11 and the second guide groove 41 and limits deflection in other directions, wherein the circumferential wheel surface of the flat roller is in rolling contact with the notches of two opposite sides, so that the stability of the relative distance between the carrier 10 and the base 40 is ensured, the stability of the relative movement posture is maintained in the relative movement process, and the shaking amplitude of the motor is restrained.

Wherein, there is a height difference between the magnetic element 20 and the coil 50 in the moving direction of the carrier 10, and the positions of the magnetic element 20 and the coil 50 are the height difference between the upper and lower positions compared with the moving direction of the carrier 10, and when the positional relationship between the magnetic element 20 and the coil 50 is in the vertical up-down facing relationship, it can fully utilize the electromagnetic field force.

The embodiment of the application also provides a lens module based on the ball type voice coil motor; the optical lens module specifically comprises the ball-type voice coil motor, a lens fixedly arranged in a carrier 10 of the ball-type voice coil motor, an optical filter arranged on the light-emitting side of the lens, an image sensing chip, a chip configuration circuit board and a module base; the base 40 is fixedly arranged on the module base, a step part is arranged at the upper end of the module base and used for bonding the optical filter, the optical filter and the image sensing chip are arranged at intervals, the optical filter is arranged above the image sensing chip, the image sensing chip is arranged on the chip configuration circuit board and electrically connected with the chip configuration circuit board, the chip configuration circuit board is arranged on the module base, specifically, after the base 40 and the module base are packaged and fixed, a cavity can be formed inside the chip configuration circuit board, and the optical filter and the image sensing chip are arranged in the cavity.

In some embodiments, the lens module may further include other functional structures, such as a chip anti-shake structure, for adjusting the position of the image chip; and will not be described in detail herein.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.

In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

In the description of the present invention, unless otherwise expressly specified or limited, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

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

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including the preferred embodiment and all changes and modifications that fall within the scope of the present application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (10)

1. A ball type voice coil motor, comprising: the device comprises a magnetic element, a carrier, a ceramic roller, a base and a coil;

the carrier and the base are cylinder-like members, the carrier is movably arranged in the base, and the ceramic rollers are movably arranged between the side wall of the carrier and the side wall of the base;

the magnetic element and the coil are disposed on the carrier and the base, respectively.

2. The ball-type voice coil motor of claim 1, wherein the coil is disposed on the base, and the magnetic element is disposed on the carrier; the magnetic element is glued to the upper part of the carrier, and the lower end of the carrier is placed on the supporting table.

3. The ball-type voice coil motor of claim 1, wherein the coil is disposed on the carrier, and the magnetic element is disposed on the base;

the magnetic element is glued on the supporting table, the coil is wound on the upper portion of the carrier, and the lower end of the carrier is placed on the supporting table.

4. The ball-type voice coil motor according to claim 2 or 3, wherein the magnetic member is opposed to the coil.

5. The ball-type voice coil motor according to claim 1, wherein the magnetic element is a magnet.

6. The ball-type voice coil motor of claim 1, wherein the ceramic roller is a ceramic flat roller.

7. The ball-type voice coil motor according to claim 1, wherein a first guide groove is formed on an outer circumferential side wall of the carrier, a second guide groove opposite to the first guide groove is formed on an inner circumferential side wall of the base, and a notch of the first guide groove and a notch of the second guide groove are oppositely arranged;

the ceramic roller is arranged in the notch of the first guide groove and the second guide groove.

8. The ball-type voice coil motor according to claim 7, wherein the circumferential surface of the ceramic roller is in rolling contact with the notches of the first and second guide grooves which are opposite on both sides.

9. The ball-type voice coil motor according to claim 1, wherein there is a height difference between the magnetic element and the coil in a moving direction of the carrier.

10. A lens module, comprising: a lens and a ball-type voice coil motor according to any one of claims 1 to 9, wherein the lens is fixedly mounted on a carrier of the ball-type voice coil motor.

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