CN217787475U - Piezoelectric stator type lens driving device - Google Patents

Abstract

The utility model relates to a piezoelectricity stator formula lens drive arrangement, including base, fixed subassembly, circuit board, mirror holder, stator module, ball piece subassembly and enclosing cover, enclosing cover and base form the accommodation space, be equipped with the mirror holder in the accommodation space, be equipped with fixed subassembly and circuit board on the base, be equipped with pre-compaction spring leaf, ball piece subassembly and stator module on the fixed subassembly, the ball piece subassembly is two sets of ball pieces, stator module includes the stator, increases pad and piezoelectric patches, and the drive mode can make the piezoelectric patches grow and warp for applying ascending alternating voltage and frequency, and at this moment the external force that the feeler of stator produced can be greater than the biggest frictional force of mirror holder, promotes the mirror holder and rises, can make the feeler of stator contract fast when applying alternating voltage and frequency and descend, and at this moment the external force that produces can be greater than the biggest static frictional force for the phenomenon appears sliding between mirror holder and the stator, later the stator resumes initial condition.

Description

Piezoelectric stator type lens driving device

Technical Field

The invention relates to a camera lens driving device, in particular to a piezoelectric stator type lens driving device driven by a stator.

Background

The most lens driving devices used in the current market are Voice Coil motors (Voice Coil actuators/Voice Coil motors), which are devices that convert electrical energy into mechanical energy and realize linear and limited swing angle movements. The device which generates regular movement by utilizing the interaction between the magnetic field from the permanent magnetic steel and the magnetic poles in the magnetic field generated by the electrified coil conductor has wide application in the fields of industry, medical field, breathing machine, camera focusing and the like.

With the improvement of photographic image quality, the weight of a lens in a camera from 8M to 108M can be from 0.08 g to 1 g, even heavier, the lens can be gradually pushed to be still by magnetic thrust by using a voice coil motor, and the voice coil motor is more suitable for the movement of a micro stroke, and a technical scheme which is not disclosed for a driving device of a long stroke is not provided.

Disclosure of Invention

The invention aims to provide a piezoelectric stator type lens driving device which is high in response speed, high in driving stability and long in stroke.

The utility model provides a piezoelectricity stator formula lens drive arrangement, includes that base, mirror holder and lid are established enclosing cover on the base, form the accommodation space between enclosing cover and the base, be equipped with the mirror holder in the accommodation space, be equipped with fixed subassembly on the base, be equipped with pre-compaction spring leaf, ball piece subassembly and stator module on the fixed subassembly, the quantity of ball piece subassembly is two sets of, comprises first ball piece subassembly and second ball piece subassembly, and every group ball piece subassembly all contains two ball pieces, stator module includes the stator, increases pad and piezoelectric patches, stator one side is equipped with and increases the pad, it is connected with fixed subassembly to increase the pad, the stator is made by the elastic metal material, both sides respectively are equipped with a slice piezoelectric patches around the stator, when giving alternating current and specific frequency point two slices of piezoelectric patches in the back, under piezoelectric patches, piezoelectric patches and stator produce resonance and produce first mode, are in stator and the mirror holder under the first mode and are connected, can promote the mirror holder and remove along the vertical direction. In the above scheme, two piezoelectric patches of the stator are bonded on the upper side or the lower side or the front side and the rear side of the stator, the stator is made of elastic metal and can deform under a certain condition, the driving mode of the device is to give alternating current and a specific frequency point to the upper piezoelectric patch and the lower piezoelectric patch, at the moment, under the piezoelectric effect, the piezoelectric patches and the stator generate resonance and generate a special mode, which is called as a first mode, wherein a certain contact relation can be kept between the stator and the lens frame through the pre-pressing spring patch and the ball patch, the pre-pressing spring patch is connected with the first ball patch assembly and used for adjusting the movement of the lens frame on the base in one direction, the second ball patch is used for fixing the movement of the lens frame on the base in the other direction, and the two directions are perpendicular to each other. Under the condition that the driving mode is the same as the first mode, under the condition that alternating current and frequency are given to the second mode, the stator can enable the lens frame to generate a moving direction opposite to that of the first mode.

Further, the stator includes the elastomer, one side of elastomer is equipped with the girder, and the opposite side is equipped with the mounting, the one end of girder is equipped with the auxiliary girder, the tip of auxiliary girder is the antenna. In the scheme, the piezoelectric effect generated by the two piezoelectric sheets resonates with the elastic body, the P wave and the S wave change sequentially, the main beam transmits the P wave and the S wave to the auxiliary beam to cause the antenna to generate modal change, the piezoelectric sheets are lengthened by applying the rising voltage, the external force generated by the antenna of the elastic body is larger than the maximum static friction force of the lens frame, the lens frame and the antenna of the elastic body are in a contact state, the antenna of the elastic body contracts quickly when the applied voltage drops quickly, the generated external force is larger than the maximum static friction force, the lens frame and the stator slide, then the stator returns to the initial state, and the long-stroke motion can be realized by repeating the steps.

Furthermore, the auxiliary beam and the main beam of the stator are arranged at an included angle of 90 degrees or at an acute angle. In the above scheme, the contained angle of auxiliary girder and girder is the shared space difference of 90 degrees or acute angle, and the auxiliary girder that chooses for use when the space is great is the stator that 90 degrees contained angles set up with the girder, chooses for use when the space is less that auxiliary girder and girder are the stator that the acute angle set up.

Further, the fixing piece is composed of an upper fixing seat and a lower fixing seat, the upper fixing seat is located at the upper side part of the elastic body, and the lower fixing seat is located at the lower side part of the elastic body; or the fixing piece is positioned at the lower side part of the elastic body. In the above scheme, the mounting distribution mode difference is applicable to different lens drive device structures, and after the piezoelectric stator drive effect, the mirror holder vertical direction displacement, the reaction rate is fast and drive stability is high, can also realize long stroke drive.

Furthermore, the fixing part of the elastic body is provided with a heightening pad, the heightening pad and the piezoelectric sheet on one side are fixed on the same plane of the stator, and the heightening pad is a square block with a circular through hole in the middle. In above-mentioned scheme, it is the same with the last fixing base of stator and lower fixing base structure to increase the pad, because bonded two piezoelectric patches that have certain thickness on the elastomer, increased through increasing the pad and kept away the vacancy and could fix the stator on the stator fixing base to make things convenient for the piezoelectric patches to pull signal line to stator signal line wiring dish.

Further, fixed subassembly includes spring leaf fixing base, ball piece fixing base, stator signal line wiring dish and stator fixing base, be equipped with the spring leaf fixing base in the middle of base upper surface one side, the base upper surface is equipped with stator signal line wiring dish with the relative one side of spring leaf fixing base, respectively be equipped with a stator fixing base about stator signal line wiring dish, respectively be equipped with a ball piece fixing base in the middle of the adjacent both sides of base upper surface and stator fixing base. In the above scheme, the spring leaf fixing seat is used for fixing the pre-pressing spring leaf, the ball piece fixing seat is used for fixing the ball piece, the stator fixing seat is used for fixing the stator assembly, and when the stator moves to contact the mirror bracket, the mirror bracket is stable when the base moves in the X direction and the Y direction.

Further, the inside of spring leaf stationary seat is equipped with pre-compaction spring leaf subassembly, be equipped with first ball piece subassembly on the pre-compaction spring leaf subassembly, pre-compaction spring leaf subassembly comprises two pre-compaction spring leaves, and two pre-compaction spring leaves distribute respectively in the medial surface both sides portion of spring leaf stationary seat, and every pre-compaction spring leaf inboard is equipped with a slice ball piece. In the above scheme, spring leaf stator, pre-compaction spring leaf and ball piece are the pre-compaction subassembly, the pre-compaction subassembly is installed and is contacted with one side of mirror holder on base Y direction, and when the feeler of stator did not contact with the mirror holder, the position that can adjust the pre-compaction subassembly makes the mirror holder move in Y direction and the stator keeps the contact.

Furthermore, two ball pieces of the second ball piece assembly are respectively arranged on the two ball piece fixing seats on the base, a plurality of ball holes are distributed in the ball pieces, and ball bodies penetrating through the ball pieces are arranged in the ball holes. In the above scheme, ball piece fixing base and two ball pieces constitute a slide rail and fix the X direction at the base, the ball piece is fixed in the X direction with the lens frame with the mirror holder contact, and the mirror holder can move in Z direction vertical direction promptly, and when the mirror holder met external drive, the mirror holder was the point contact with the ball, realized the removal of mirror holder.

Furthermore, a mirror holder is arranged in the middle of the upper surface of the base, a Hall assembly is arranged on one side of the mirror holder, and the mirror holder is in contact with the ball piece and the stator. In the above-mentioned scheme, the stator drive mirror holder is through contacting the back with the ball piece point, and the vertical direction carries out the displacement, when the mirror holder is going up or down when moving, the piezoelectricity stator drive signal of one side is first mode, and the stator of opposite side is the second mode, and when the drive to piezoelectricity stator simultaneously, can make the mirror holder up or down move, perhaps only drive the stator 41 of one side, the mirror holder 5 will carry out the motion down with more tiny interval.

Furthermore, the outer cover is arranged above the mirror bracket, the bottom of the outer cover is connected with the upper surface of the base, and the outer cover, the mirror bracket and the base are communicated. In the scheme, the outer cover is used for protecting the fixed assembly, the pre-pressing spring piece, the ball piece and the stator which are fixed on the base.

The piezoelectric stator type lens driving device at least has the following beneficial effects:

first, the reaction rate is fast and drive stability is high, produces piezoelectric effect through two piezoelectric patches, produces resonance with the elastomer of stator for the stator produces the modal variation and drives the mirror holder vertical direction and carry out the displacement, and fixed subassembly and piezoelectric module guarantee the stability when driving the mirror holder.

Second, can realize long stroke drive, it can make the piezoelectric patches rise long and warp to apply ascending alternating voltage and frequency, the external force that the antenna of stator elastomer produced can be greater than the biggest static friction power of mirror holder, be in the contact state between the antenna of mirror holder and elastomer, can make the antenna of stator contract fast when applying alternating voltage and frequency and descend fast, the external force that produces can be greater than the biggest static friction power, lead to appearing the slip phenomenon between mirror holder and the stator, later the stator resumes initial condition, repeat above-mentioned step and can realize long stroke motion.

Third, application scope is wide, can be according to the different stators of lens design of difference, and the girder can be chooseed for use to the space great and the auxiliary girder is the stator of 90 degrees, and the girder can be chooseed for use to the space narrower and the auxiliary girder is the stator of acute angle.

Drawings

Fig. 1 is an exploded view of a piezoelectric lens driving apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic view of a stator structure in embodiment 1;

FIG. 3 is a schematic view of the arrangement of the base and the fixing elements in the embodiment of the present invention;

fig. 4 (a), 4 (b), 4 (c) are schematic views of the stator structure in embodiments 1, 2 and 3;

FIG. 5 is a schematic view showing a first mode motion of the stator in embodiment 1;

FIG. 6 is a schematic view showing a second mode motion of the stator in embodiment 1;

FIG. 7 is a schematic view showing a first mode motion of the stator in embodiment 2;

FIG. 8 is a schematic view showing a second mode motion of the stator in embodiment 2;

FIG. 9 is a schematic view showing the first mode motion of the stator in embodiment 3;

FIG. 10 is a schematic view showing a second mode motion of the stator in the embodiment 3;

fig. 11 is a schematic view of an embodiment of a frame position;

fig. 12 is a schematic view of a stator in different views.

Detailed Description

The piezoelectric stator type lens driving device of the present invention will be described in further detail with reference to the following embodiments and the accompanying drawings.

Example 1

Referring to fig. 1 and 2, in a preferred embodiment, the piezoelectric stator type lens driving apparatus of the present invention includes a base 1, a fixing assembly, a circuit board 10, a lens holder 5, a stator assembly 4, a ball sheet assembly, and an outer cover 6 covering the base 1, wherein an accommodating space is formed between the outer cover 6 and the base 1, the lens holder 5 is disposed in the accommodating space, the base 1 is provided with the fixing assembly, the fixing assembly is provided with a pre-pressing spring piece 2, the ball sheet assembly 3, and the stator assembly 4, the ball sheet assembly has two sets of ball sheets 3, each set of the ball sheets 3 has two, the stator assembly 4 includes an elastic body 410, a heightening pad 42, and piezoelectric sheets 43, the elastic body 410 is provided with one piezoelectric sheet 43 at each of front and rear sides, and alternating current and a specific frequency point are provided to the front and rear piezoelectric sheets 43, so that the piezoelectric effect generates resonance to generate a specific mode to push the lens holder 5 to move in a vertical direction. The two piezoelectric sheets 43 of the stator 41 are bonded on the upper and lower sides or the left and right sides of the elastic body 410, each piezoelectric sheet 43 has an actuating end connected to the elastic body 410, and an upper and lower connecting end connected to the front and rear fixing bases, the driving method of the device is to provide alternating current and specific frequency points to the upper and lower piezoelectric sheets 43, at this time, resonance is generated due to piezoelectric effect and a special mode is generated, which is called as a first mode, wherein the prepressing spring piece 2 and the ball piece 3 can keep a certain contact relation between the stator 41 and the lens frame 5, the prepressing spring piece 2 is connected with the first ball piece assembly 31 for adjusting the movement of the lens frame 5 on the base 1 in one direction, the second ball piece assembly 32 is used for fixing the movement of the lens frame 5 on the base 1 in another direction, and the two directions are perpendicular to each other. In the same driving manner as the first mode, the stator 41 generates a moving direction of the lens frame 5 opposite to the first mode at a specific voltage frequency of the second mode.

Referring to fig. 1, 2 and 5, in this embodiment, the elastic body 410 includes a secondary beam 411, a primary beam 413, an upper fixing seat 414 and a lower fixing seat 415, an end of the secondary beam 411 is an antenna 412, and one side of the primary beam 413 in a vertical direction is connected to the secondary beam 411, and the other side of the primary beam 413 is connected to the fixing seat. The piezoelectric effect generated by the two piezoelectric sheets 43 resonates with the elastic body 410, and is transmitted to the secondary beam 411 through the main beam 413 by the change of the P-wave and the S-wave, which causes the antenna 412 to generate modal change, in a specific embodiment, the voltage rising time is a, the voltage falling time is b, the Sin waveform is a period time T, the voltage rising is applied to make the piezoelectric sheets 43 rise, the external force generated by the antenna 412 of the elastic body 410 in the time range a is greater than the maximum static friction force of the lens frame 5, the contact state is between the lens frame 5 and the antenna 412 of the elastic body 410, when the voltage falling is applied, the antenna 412 of the elastic body 410 contracts rapidly, the external force generated by the antenna 412 of the elastic body 410 in the time ranges b and c is greater than the maximum static friction force, so that the sliding phenomenon occurs between the lens frame 5 and the stator 41, the stator 41 recovers to the initial state in the time range d, which is the principle that the lens frame 5 moves further, and the cd step is repeated.

Referring to fig. 4 (a), 5 and 6, in this embodiment, the secondary beam 411 of the stator 41 is perpendicular to the main beam 413 to form a 7 shape, an upper fixing seat 414 and a lower fixing seat 415 are disposed at two ends of the main beam 413, and one heightening pad 42 is mounted on each of the upper fixing seat 414 and the lower fixing seat 415. The first mode and the second mode can appear on the antenna 412 of the secondary beam 411 of the stator 41 under different alternating currents and specific frequencies, the stator 41 is called a piezoelectric lens module after being assembled with other components, after the piezoelectric stator 41 is driven, the lens frame 5 is displaced in the vertical direction, the moving directions of the lens frame 5 under different modes are opposite, the lens frame 5 can move one step within a time period T, long-stroke motion can be realized by repeating the time period T, and the piezoelectric lens module has high response speed and high driving stability.

Referring to fig. 2 and 3, in this embodiment, the upper fixing seat 414 and the lower fixing seat 415 of the elastic body 410 are provided with the heightening pad 42, the heightening pad 42 and the piezoelectric sheet 43 on one side are fixed on the same plane of the stator, and the heightening pad 42 is a square block with a circular through hole in the middle. The heightening pad 42 has the same structure as the upper fixed seat 414 and the lower fixed seat 415 of the stator 41, a through hole is formed in the middle of the heightening pad 42 and is used for connecting the elastic body 410 of the stator fixed seat 9 and the stator 41, and two piezoelectric sheets 43 with certain thickness are bonded on the elastic body 410, so that the stator 41 can be fixed on the stator fixed seat 9 by increasing the height of the heightening pad 42.

Referring to fig. 1, 3 and 11, in this embodiment, the fixing assembly includes a spring plate fixing seat 7, a ball plate fixing seat 8, a stator signal line wiring board 11 and a stator fixing seat 9, the spring plate fixing seat 7 is disposed in the middle of one side of the upper surface of the base 1, the stator signal line wiring board 11 is disposed on one side of the upper surface of the base 1 opposite to the spring plate fixing seat 7, the stator fixing seats 9 are disposed on the left and right sides of the stator signal line wiring board 11, and the ball plate fixing seats 8 are disposed in the middle of two sides of the upper surface of the base 1 adjacent to the stator fixing seats 9. Spring leaf fixing base 7 is used for fixed pre-compaction spring leaf 2, and ball piece fixing base 8 is used for fixed ball piece 3, stator fixing base 9 is used for fixed stator module 4, when fixed subassembly made stator 41 drive contact mirror holder 5, mirror holder 5 was more stable when base 1X removed with the Y direction.

Referring to fig. 1, 3 and 11, in this embodiment, a pre-pressing spring piece 2 assembly is disposed inside the spring piece fixing seat 7, a first ball piece assembly 31 is disposed on the pre-pressing spring piece 2 assembly, the pre-pressing spring piece 2 assembly is composed of two pre-pressing spring pieces 2, the two pre-pressing spring pieces 2 are respectively distributed on two sides of the inner side of the spring piece fixing seat 7, and a ball piece 3 is disposed inside each pre-pressing spring piece 2. The spring piece fixing seat 7, the pre-pressing spring piece 2 and the ball piece 3 are pre-pressing components, the pre-pressing components are installed on one side of the mirror bracket 5 in the Y direction of the base 1 and are in contact with one side of the mirror bracket 5, and when the antenna 412 of the stator 41 is not in contact with the mirror bracket 5, the positions of the pre-pressing components can be adjusted to enable the mirror bracket 5 to move in the Y direction and keep in contact with the stator 41.

Referring to fig. 1, 3 and 11, in this embodiment, two ball pieces 3 of the second ball piece assembly 32 are respectively disposed on two ball piece fixing seats 8 on the base 1, a plurality of ball holes are distributed on the ball pieces 3, and ball bodies penetrating the ball pieces 3 are mounted in the ball holes. Ball piece fixing base 8 constitutes a slide rail with two ball pieces 3 and fixes the X direction at base 11, ball piece 3 and 5 contacts of mirror holder 5 with mirror holder 5 fixed motionless in the X direction, mirror holder 5 can move in Z direction vertical direction promptly, when mirror holder 5 met external drive, mirror holder 5 was the point contact with ball piece 3, realizes the removal of mirror holder 5.

Referring to fig. 11 and 12, in the present embodiment, a mirror frame 5 is disposed in the middle of the upper surface of the base 1, and a hall element is disposed on one side of the mirror frame 5, and the mirror frame 5 is in contact with the ball piece 3 and the stator 41. The stator 41 drives the lens frame 5 to move vertically through the ball sheet 3, when the lens frame 5 moves upwards, the piezoelectric stator driving signal of the right side view is in a second mode, the stator 41 of the left side view is in a first mode, and meanwhile, when the piezoelectric stator is driven, the lens frame 5 moves upwards; when the lens frame 5 is going to move downward, the piezoelectric stator driving signal in the right side view is in the first mode, the stator 41 in the left side view is in the second mode, and when the piezoelectric stator 41 is driven, the lens frame 5 moves downward, or only the stator 41 on one side is driven, so that the lens frame 5 moves downward at a smaller distance.

Referring to fig. 1, in this embodiment, the outer cover 6 is mounted above the frame 5, the bottom of the outer cover is connected to the upper surface of the base, and the outer cover 6, the frame 5 and the base 1 are connected in the middle. The outer cover 6 is used for protecting a fixed component fixed on the base 1, the pre-pressing spring piece 2, the ball piece 3 and the stator 4.

According to the working principle and process of the piezoelectric stator type lens driving device, alternating current and a specific frequency point are supplied to an upper piezoelectric sheet 43 and a lower piezoelectric sheet 43, the antenna 412 of a stator 41 generates resonance and generates a special mode due to piezoelectric effect at the moment, the mode is called as a first mode, wherein a spring sheet fixing seat 7, a pre-pressing spring sheet 2 and a ball sheet 3 are pre-pressing parts, the stator 41 is kept in contact with a lens frame 5, the movement of the lens frame 5 in a Y direction can be adjusted, the ball sheet fixing seat 8 and the two ball sheets 3 form a sliding rail, the lens frame 5 can slide up and down in contact with the balls, the X direction of the lens frame 5 is fixed, the Z direction can move in a vertical direction, a rising voltage is firstly applied to enable the piezoelectric sheets 43 to rise, an external force generated by the antenna 412 of the stator 41 is larger than the maximum friction force of the lens frame 5 to push the lens frame 5 to rise, when the voltage is applied to fall rapidly, the antenna 412 of the stator 41 contracts, the external force generated is larger than the maximum static friction force, the sliding phenomenon occurs between the lens frame 5 and the stator 41 and the initial state is recovered, the steps are repeated, the requirements of the driving mode can be met, the driving mode and the driving mode is the driving mode and the first mode and the second specific frequency point is opposite to the second frequency of the antenna 41.

Example 2

Referring to fig. 4 (b), fig. 7 and fig. 8, a non-limiting embodiment of the present invention has a structure and a principle that are substantially the same as those of the embodiment, and what is different is that an included angle between a secondary beam 411 of the stator 41 and a main beam 413 is 0 to 90 °, an upper fixing seat 414 and a lower fixing seat 415 are disposed at two ends of the main beam 413, and a height increasing pad 42 is respectively mounted on each of the upper fixing seat 414 and the lower fixing seat 415, so that not only can the vertical displacement of the lens frame 5 be driven, but also the stator 41 is narrower as a whole, and can be applied to a device with a larger lens frame 5, or can reduce the original size of the base 1, and since the space of the stator 41 is smaller, other devices can be added.

Example 3

Referring to fig. 4 (c), 9 and 10, a non-limiting embodiment of the present invention is basically the same as the structure and principle of embodiment 1, and the difference is that an included angle between the secondary beam 411 and the main beam 413 is 0 to 90 °, a lower fixing seat 415 is disposed at the lower end of the main beam 413, and two heightening pads 42 are disposed on the lower fixing seat 415, so that not only can the vertical displacement of the lens frame 5 be driven, but also the stator 41 is narrow as a whole, and is suitable for a device with a larger lens frame 5, or the original size of the base 1 can be reduced, and other devices can be added because the space of the stator 41 is small.

In the description of the present invention, it is to be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed and operated in specific orientations, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.

Claims (10)

1. The utility model provides a piezoelectricity stator formula lens drive arrangement, includes that base, mirror holder and lid establish the enclosing cover on the base, form the accommodation space between enclosing cover and the base, the accommodation space in be equipped with the mirror holder, its characterized in that, be equipped with fixed subassembly on the base, be equipped with pre-compaction spring leaf, ball piece subassembly and stator module on the fixed subassembly, ball piece subassembly's quantity is two sets of, comprises first ball piece subassembly and second ball piece subassembly, every group ball piece subassembly all contains two ball pieces, stator module includes the stator, increases pad and piezoelectric patches, stator left side or right side are equipped with and increase the pad, it is connected with fixed subassembly and avoids stator and stator fixing base to interfere and makes things convenient for the piezoelectric patches to pull signal line to stator signal line wiring dish to increase, the stator is made by the elastic metal material, both sides respectively are equipped with a slice piezoelectric patches around the stator, when giving alternating current and specific frequency point to two front and back piezoelectric patches, under the piezoelectric effect, piezoelectric patches and stator produce resonance and produce first mode, can promote after stator and the mirror holder contact under the first mode and remove along the vertical direction.

2. The piezoelectric stator type lens driving device as claimed in claim 1, wherein the stator comprises an elastic body having a main beam at one side and a fixing member at the other side, and a sub beam at one end of the main beam and having a feeler at an end thereof.

3. The piezoelectric stator lens actuator of claim 2, wherein the secondary beam and the primary beam of the stator are disposed at an angle of 90 degrees or at an acute angle.

4. The piezoelectric stator type lens driving device as claimed in claim 2, wherein the fixing member is composed of an upper fixing base and a lower fixing base, the upper fixing base is located at an upper side portion of the elastic body, and the lower fixing base is located at a lower side portion of the elastic body; or the fixing piece is positioned at the lower side part of the elastic body.

5. A piezoelectric stator type lens driving device as claimed in claim 2 or 4, wherein the elastomer fixing member is provided with a heightening pad, the heightening pad is fixed on the same plane of the stator with the piezoelectric sheet on one side, and the heightening pad is a square block with a circular through hole in the middle.

6. A piezoelectric stator type lens driving device according to claim 1, wherein the fixing member includes a spring plate fixing base, a ball plate fixing base, a stator signal line land and a stator fixing base, the spring plate fixing base is provided in the middle of one side of the upper surface of the base, the stator signal line land is provided on the upper surface of the base on the side opposite to the spring plate fixing base, the stator fixing base is provided on each of the left and right sides of the stator signal line land, and the ball plate fixing base is provided in the middle of each of the two sides of the upper surface of the base adjacent to the stator fixing base.

7. A piezoelectric stator lens driving device according to claim 6, wherein the spring plate holder is provided on an inner side thereof with a pre-pressing spring plate assembly, the pre-pressing spring plate assembly being provided with the first ball plate assembly, the pre-pressing spring plate assembly being composed of two pre-pressing spring plates respectively disposed on both side portions of the inner side of the spring plate holder, each pre-pressing spring plate being provided on an inner side thereof with a ball plate.

8. The piezoelectric stator lens driving device as claimed in claim 1 or 6, wherein the two ball pieces of the second ball piece assembly are respectively disposed on two ball piece fixing bases on the base, the ball pieces are distributed with a plurality of ball holes, and the ball holes are internally installed with ball bodies penetrating through the ball pieces.

9. The piezoelectric stator type lens driving device as claimed in claim 1, wherein a mirror holder is provided in the middle of the upper surface of the base, and a hall element is provided at one side of the mirror holder, the mirror holder having a certain degree of contact with the ball piece and the stator.

10. The piezoelectric stator type lens driving device as claimed in claim 1, wherein the outer cover is mounted above the mirror holder, a bottom of the outer cover is connected to an upper surface of the base, and the outer cover, the mirror holder and the base are penetrated.

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