CN220287000U - Direct-acting piezoelectric opposite-pressing type cradle head - Google Patents

Abstract

The utility model belongs to the technical field of optical imaging equipment, and particularly relates to a direct-acting piezoelectric opposite-pressing type holder. The utility model provides a direct-acting piezoelectricity is to formula cloud platform, includes shell, base, drive assembly, frame, motor carrier and built-in circuit, has the cavity between shell and the base, and the motor carrier sets up in the frame, and drive assembly and frame set up in the cavity, and drive assembly includes: at least two groups of piezoelectric driving mechanisms are arranged on the base, are positioned outside the frame and are connected with the frame, are connected with a built-in circuit in the base, and are electrified to drive the frame and the motor carrier to swing in the X-axis direction or the Y-axis direction relative to the base. The utility model adopts a driving mode of a plurality of groups of piezoelectric driving mechanisms to swing the frame and the motor carrier, and realizes the anti-shake operation of the motor carrier in the X-axis and Y-axis directions through the swing motions in different directions.

Description

Direct-acting piezoelectric opposite-pressing type cradle head

Technical Field

The utility model belongs to the technical field of optical imaging equipment, and particularly relates to a direct-acting piezoelectric opposite-pressing type holder.

Background

With the development of technology, many electronic devices (such as smart phones or digital cameras) have photographing or video recording functions. The use of these electronic devices is becoming more and more popular and is evolving towards a convenient and light-weight design that provides more options for the user.

Some electronic devices with photographing or video recording function are provided with a lens driving device to drive an Optical component such as a lens to move, so as to achieve the functions of auto focus (auto focus) and Optical vibration prevention (Optical ImageStabilization, OIS). The light can be imaged through the optical assembly onto the photosensitive assembly.

The existing lens driving apparatus generally includes an OIS coil group for preventing lens shake, a magnet group, a zoom coil, and a carrier for mounting a lens. The OIS coil group is generally provided with a plurality of OIS coils, the magnet group is provided with a plurality of magnets, under the cooperation of the OIS coils and the corresponding magnets, the carrier and the lens move in the directions of the X axis and the Y axis, and under the cooperation of the zoom coils and the corresponding magnets, the carrier and the lens move in the direction of the Z axis, so that the triaxial moving operation of the lens is realized.

The OIS coil set and the magnet set are matched, and the AF coil and the magnet set are matched for driving, so that the problem that other electronic components in the mobile phone are interfered by magnetic fields is solved. In addition, the magnet group is generally provided with a plurality of magnets, and when the distance between two adjacent magnets is relatively close, the internal magnetic fields of the magnets are mutually interfered, so that unexpected displacement or shaking is generated, and the stability of automatic focusing control is reduced. If the distance between two adjacent magnets is far, the miniaturization development direction of the electronic device is affected.

Disclosure of Invention

The utility model aims at solving the technical problems and aims at providing a direct-acting piezoelectric opposite-pressing type holder.

In order to solve the above-mentioned problem, according to an aspect of the present utility model, there is provided a direct-acting piezoelectric counter-pressure type cradle head including a housing, a base, a driving assembly, a frame, a motor carrier and a built-in circuit, the housing and the base having a hollow cavity therebetween, the motor carrier being disposed in the frame, the driving assembly and the frame being disposed in the hollow cavity, the driving assembly comprising:

at least two groups of piezoelectric driving mechanisms are arranged on the base, are positioned outside the frame and are connected with the frame, are connected with a built-in circuit in the base, and are electrified to drive the frame and the motor carrier to swing in the X-axis direction or the Y-axis direction relative to the base.

The utility model eliminates the prior mode of driving the motor carrier by matching the OIS coil group and the magnet group, adopts the driving mode of the piezoelectric driving mechanism, realizes the swinging motion of the frame and the motor carrier therein after the built-in circuit electrifies the piezoelectric driving mechanism, and realizes the anti-shake operation of the motor carrier in the X-axis and Y-axis directions through the swinging motion in different directions. In this driving method, the arrangement of magnets and the problem of magnetic field interference are not required to be considered, and the arrangement of miniaturization and light weight can be performed according to the specifications of the motor carrier.

In addition, the base is provided with the piezoelectric driving mechanisms, so that a counter-pressure driving mode is realized, the piezoelectric driving mechanisms can symmetrically press the frame to perform reciprocating motion, and limit and guide effects on the frame and the motor carrier are realized, so that the whole anti-shake operation process is stable and reliable.

The piezoelectric driving mechanisms are two groups, and the two groups of piezoelectric driving mechanisms are oppositely arranged on the outer side of the frame.

The piezoelectric driving mechanisms are three groups, one group of the piezoelectric driving mechanisms is positioned on the middle vertical line of the connecting line of the other two groups of the piezoelectric driving mechanisms, and included angles among the three groups of the piezoelectric driving mechanisms are equal or unequal.

The piezoelectric driving mechanisms are more than three groups, and the piezoelectric driving mechanisms are distributed on the periphery of the frame.

The piezoelectric driving mechanism includes:

the two sides of the movable piece are respectively connected with the frame through reeds, and the outer side of the movable piece is provided with a wear-resistant piece;

the piezoelectric mechanism comprises a balancing weight, a piezoelectric block and a friction piece, wherein the balancing weight is arranged on the base, the piezoelectric block is arranged at the top end of the balancing weight, the piezoelectric block is connected with the built-in circuit, the friction piece is arranged at the top end of the piezoelectric block, and the friction piece is contacted with the wear-resistant piece;

after the piezoelectric block is electrified, the piezoelectric block generates deformation along the optical axis direction and pushes the friction piece to move along the optical axis direction, the friction piece is connected with the wear-resistant piece through friction force to drive the movable piece to move along the optical axis direction, the inner side of the movable piece is extruded by the friction force, under the action of the reed, the reed generates reverse elastic force on the movable piece, so that the movable piece is extruded on the friction piece, the extrusion friction force between the movable piece and the friction piece is increased, and when the piezoelectric mechanism moves, the movable piece, the frame and the motor carrier are driven to move along the optical axis direction through the guide extrusion friction force of the friction piece;

when one group of piezoelectric mechanisms performs ascending motion along the optical axis direction, the other group or groups of piezoelectric mechanisms perform opposite motions, and under the action of the groups of piezoelectric mechanisms, the frame performs swinging motions.

The base is provided with a piezoelectric groove, and the balancing weight is installed in the piezoelectric groove.

The outside of frame is provided with piezoelectricity mechanism mounting groove, the moving part is installed piezoelectricity mechanism mounting groove is interior, the inner wall of moving part with have between the inner wall of piezoelectricity mechanism mounting groove and dodge the clearance.

The reeds on two sides of the movable piece are of an integrated or split structure;

the reed and the wear-resistant piece are of an integrated or split structure; or (b)

The middle part of the reed is provided with a reed avoiding through hole, and the wear-resistant piece is positioned at the inner side of the reed avoiding through hole.

The base is provided with a mounting seat, and a position sensor is arranged on the mounting seat;

the frame is provided with an induction magnet which is arranged corresponding to the position sensor;

the number of the induction magnets and the number of the position sensors are at least two, and the induction magnets and the position sensors are arranged corresponding to the piezoelectric driving mechanism.

The motor carrier is an AF motor or a carrier for mounting the AF motor.

The bottom of motor carrier is provided with the circuit board that is used for supplying power for AF motor, the circuit board stretch out in the base and the shell.

The novel flexible printed circuit board comprises a frame and is characterized in that an FPC board avoiding groove is formed in one side of the frame, an FPC board mounting groove is formed in the outer wall of the bottom end of the frame, an FPC board limiting groove is formed in a base, and the FPC board limiting groove is located at the outer side of the FPC board avoiding groove;

the circuit board is the FPC board, the FPC board is followed after stretching out from the motor carrier, through the FPC board dodges the groove and wears out to the FPC board spacing groove after the bending of FPC board spacing groove is worn out to outside the base through the FPC board mounting groove.

The beneficial effects are that: the utility model has at least one or more of the following advantages:

1. the frame and the motor carrier are driven by a plurality of groups of piezoelectric driving mechanisms to swing, and anti-shake operation of the motor carrier in the X-axis and Y-axis directions is realized through the swing motion in different directions. And meanwhile, the zooming effect of the lens is realized through the AF action of the AF motor. Finally, the OIS anti-shake and automatic zooming functions are realized. The utility model can be miniaturized and light according to the specification of the motor carrier without considering the arrangement of magnets and the problem of magnetic field interference.

2. The piezoelectric driving mechanisms symmetrically or uniformly arranged on the base act together to realize the multi-angle swinging motion of the frame and the motor carrier. When the frame swings at multiple angles, due to the design of avoiding gaps, the reed can be twisted along with the occurrence of torsion, and the movable piece cannot be twisted in the moving direction, so that the contact area between the wear-resistant piece and the friction piece is unchanged, and the friction effect of the friction piece and the movable piece is unchanged.

3. The swing amplitude of the frame can be monitored through the cooperation of the position sensor and the magnet.

Drawings

FIG. 1 is a schematic representation of one embodiment of the present utility model;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a further exploded view of FIG. 2;

FIG. 4 is a further exploded view of FIG. 3;

FIG. 5 is a schematic view of the internal structure of FIG. 1;

FIG. 6 is a partial exploded view of FIG. 5;

FIG. 7 is another angular partial schematic view of FIG. 5;

fig. 8 is another angular schematic view of the frame of fig. 2.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the attached drawings, so that the objects, features and advantages of the present utility model will be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the utility model, but rather are merely illustrative of the true spirit of the utility model.

In the following description, for the purposes of explanation of various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that an embodiment may be practiced without one or more of the specific details. In other instances, well-known devices, structures, and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the following description, for the purposes of clarity of presentation of the structure and manner of operation of the present utility model, the description will be made with the aid of directional terms, but such terms as "forward," "rearward," "left," "right," "outward," "inner," "outward," "inward," "upper," "lower," etc. are to be construed as convenience, and are not to be limiting.

Referring to fig. 1 to 8, an embodiment of the present utility model provides a direct-acting piezoelectric opposite-pressing type holder, which includes a housing 1, a base 2, a driving assembly, a frame 4, a motor carrier 5 and a built-in circuit, wherein a hollow cavity is formed between the housing 1 and the base 2, and the housing 1 and the base 2 are preferably connected by buckling to form the hollow cavity. The motor carrier 5 is arranged in the frame 4, the driving assembly, the frame 4 and the motor carrier 5 are arranged in the hollow cavity, and the middle parts of the shell 1, the base 2, the driving assembly, the frame 4 and the motor carrier 5 are provided with motor through holes which are axially communicated in the up-down direction so as to accommodate the motor.

The driving assembly comprises at least two groups of piezoelectric driving mechanisms 3, the groups of piezoelectric driving mechanisms 3 are arranged on the base 2, the groups of piezoelectric driving mechanisms 3 are positioned outside the frame 4 and are connected with the frame 4, the groups of piezoelectric driving mechanisms 3 mutually extrude and position the frame 4, the positions of the groups of piezoelectric driving mechanisms 3 outside the frame 4 can be adjusted and set according to the number of the piezoelectric driving mechanisms 3, and only the groups of piezoelectric driving mechanisms 3 can mutually extrude and position the frame 4 and can drive the frame 4 to swing. Each group of piezoelectric driving mechanisms 3 is respectively connected with a built-in circuit in the base 2, the built-in circuit supplies power to the piezoelectric driving mechanisms 3, and the piezoelectric driving mechanisms 3 can drive the frame 4 and the motor carrier 5 therein to move along the up-down direction after being electrified. By the movement of the plurality of groups of piezoelectric driving mechanisms 3 in different directions, the frame 4 and the motor carrier 5 perform swinging motion in the X-axis direction or the Y-axis direction relative to the base 2. The X-axis direction and the Y-axis direction herein are directions perpendicular to the Z-axis (up-down direction).

The utility model eliminates the prior mode of driving the motor carrier 5 by matching the OIS coil group and the magnet group, adopts the driving mode of the piezoelectric driving mechanism 3, realizes the swinging motion of the frame 4 and the motor carrier 5 therein after the built-in circuit powers on the piezoelectric driving mechanism 3, and realizes the anti-shake operation of the motor carrier 5 in the X-axis and Y-axis directions through the swinging motions in different directions. In this driving method, the arrangement of magnets and the problem of magnetic field disturbance are not considered, and the arrangement of miniaturization and weight saving can be performed according to the specification of the motor carrier 5.

In addition, the utility model realizes a opposite-pressing type driving mode by arranging the plurality of piezoelectric driving mechanisms 3 on the base 2, and the plurality of piezoelectric driving mechanisms 3 can symmetrically mutually press the positioning frame 4 to reciprocate, and realize limit and guide functions on the frame 4 and the motor carrier 5, so that the whole anti-shake operation process is stable and reliable.

Optionally, at least two sets of piezoelectric driving mechanisms 3 are distributed around the periphery of the frame 4. In some embodiments, groups of piezoelectric driving mechanisms 3 are uniformly distributed on the periphery of the frame 4.

Alternatively, the piezoelectric driving mechanisms 3 are two groups, and the two groups of piezoelectric driving mechanisms 3 are oppositely arranged outside the frame 4. For example, two groups of piezoelectric driving mechanisms 3 are symmetrically arranged at two end angle positions of the base 2, and the two groups of piezoelectric driving mechanisms 3 mutually press the positioning frame 4.

Alternatively, referring to fig. 5, the piezoelectric driving mechanisms 3 are three groups, and the three groups of piezoelectric driving mechanisms 3 are distributed on the periphery of the frame 4, and the distribution strategy is as follows: one group of piezoelectric driving mechanisms 3 are positioned on the middle vertical line of the connecting lines of the other two groups of piezoelectric driving mechanisms 3, and the included angles among the three groups of piezoelectric driving mechanisms 3 can be equal or unequal.

Optionally, the piezoelectric driving mechanisms 3 are more than three groups, and the piezoelectric driving mechanisms 3 of the groups are distributed on the periphery of the frame 4.

For example, if the piezoelectric driving mechanisms 3 are four groups, the four groups of piezoelectric driving mechanisms 3 are distributed around the frame 4, and the outer wall of the frame 4 may be of a quadrilateral or multiple of four. If the piezoelectric driving mechanisms 3 are five groups, the five groups of piezoelectric driving mechanisms 3 may be distributed around the frame 4 in a pentagonal manner, and then the outer wall of the frame 4 may be designed as a pentagon or a multiple of five. If the piezoelectric driving mechanisms 3 are N groups, the N groups of piezoelectric driving mechanisms 3 are distributed around the frame 4, and the outer wall of the frame 4 may be designed as N-sided or N multiple.

Alternatively, the same structure is adopted for each of the plurality of sets of piezoelectric driving mechanisms 3, and each set of piezoelectric driving mechanisms 3 includes a reed 31, a movable member 32, a wear-resistant member 33, and a piezoelectric mechanism including a weight 34, a piezoelectric block 35, and a friction member 36.

The two sides of the movable piece 32 are respectively connected with the frame 4 through reeds 31, and the outer side of the movable piece 32 is provided with a wear-resistant piece 33. The balancing weight 34 is arranged on the base 2, a piezoelectric block 35 is arranged at the top end of the balancing weight 34, the piezoelectric block 35 is connected with a built-in circuit, a friction piece 36 is arranged at the top end of the piezoelectric block 35, and the friction piece 36 is in contact with the wear-resistant piece 33.

After the piezoelectric block 35 is electrified, the piezoelectric block 35 deforms in the up-down direction, the friction piece 36 is pushed to move in the up-down direction, the friction piece 36 is connected with the wear-resistant piece 33 through friction force, the movable piece 32 is driven to move in the up-down direction, the inner side of the movable piece 32 is extruded by friction force, under the action of the reed 31, the reed 31 generates reverse elastic force on the movable piece 32, the movable piece 32 is extruded on the friction piece 36, extrusion friction force between the movable piece 32 and the friction piece 36 is increased, and when the piezoelectric mechanism moves, the friction piece 36 guides extrusion friction force to drive the movable piece 32, the frame 4 and the motor carrier 5 to move in the up-down direction.

When one group of piezoelectric mechanisms performs an ascending motion, the other group or groups of piezoelectric mechanisms perform an opposite motion (descending motion), and under the action of the groups of piezoelectric mechanisms, the frame 4 performs a swinging motion. By operating with different piezoelectric mechanisms, the frame 4 can perform swinging motions at a plurality of angles, thereby realizing the X-axis and Y-axis anti-shake effects of the motor carrier 5.

Optionally, the outside of moving part 32 is provided with V type groove, and wearing part 33 is the V type spare that laminating V type groove was established, and wearing part 33 laminating is installed on the cell wall in V type groove.

Optionally, the side of the friction member 36 contacting the wear member 33 is arcuate.

Alternatively, referring to fig. 2 to 4, the base 2 is provided with a piezoelectric groove 21, and the weight 34 is installed in the piezoelectric groove 21.

The number of the piezoelectric grooves 21 is determined according to the number of the piezoelectric driving mechanisms 3, and one piezoelectric driving mechanism 3 is provided with one piezoelectric groove 21.

Optionally, a mounting protrusion is provided on the base 2, and a piezoelectric groove 21 is provided on the mounting protrusion.

Alternatively, referring to fig. 2 to 4, a piezoelectric mechanism mounting groove 41 is provided on the outer side of the frame 4, the movable member 32 is mounted in the piezoelectric mechanism mounting groove 41, and a clearance 6 is provided between the inner wall of the movable member 32 and the inner wall of the piezoelectric mechanism mounting groove 41.

When the frame 4 performs multi-angle swinging motion, due to the design of the avoiding gap 6, the reed 31 can be twisted along with the occurrence of torsion, and the movable piece 32 can not be twisted in the motion direction, so that the contact area between the wear-resistant piece 33 and the friction piece 36 is unchanged, and the friction effect between the friction piece 36 and the movable piece 32 is unchanged.

Alternatively, the reeds 31 on both sides of the movable member 32 are of an integral or separate structure.

The reed 31 shown in fig. 4 is of a split structure, that is, two sides of the movable member 32 are respectively connected with the frame 4 inside the movable member by two independent reeds 31.

In some embodiments, two separate pieces of leaf 31 are connected together to form a unitary structure.

Alternatively, the reed 31 may be integral with or separate from the wear member 33.

In some embodiments, any one of the two reeds 31 with separate structures and the wear-resistant piece 33 inside the reed 31 can be designed independently, or can be designed by integrally connecting.

In some embodiments, the reed 31 and the wear-resistant member 33 inside the reed can be designed independently, or can be designed integrally.

Optionally, the middle part of the reed 31 is provided with a reed avoiding through hole, and the wear-resistant piece 33 is positioned at the inner side of the reed avoiding through hole. The reed evasion through hole is designed so that the friction member 36 can pass through the reed evasion through hole to contact the wear member 33 inside thereof.

In some embodiments, referring to fig. 2 to 7, two leaves 31 of a separate structure have a predetermined distance therebetween to form the leaf-avoiding through hole.

Alternatively, the single independent reed 31 comprises two leaf spring sheet connectors and a plurality of bent reed wires connected between the two leaf spring sheet connectors. One leaf spring piece connecting piece is connected with the frame 4, the other leaf spring piece connecting piece is connected with the movable piece 32, and the movable piece 32 is suspended in the piezoelectric mechanism mounting groove 41.

Optionally, the two leaf spring sheet connectors are provided with reed connecting holes, and the two leaf spring sheet connectors are connected with the frame 4 or the movable piece 32 through the reed connecting holes and the matched fixing pieces.

Alternatively, referring to fig. 2 to 4, the base 2 is provided with a mount 22, and the mount 22 is provided with a position sensor 71. The frame 4 is provided with a sensing magnet 72, and the sensing magnet 72 is provided corresponding to the position sensor 71 to monitor the swing amplitude of the frame 4.

The induction magnet 72 and the position sensor 71 are provided in at least two and correspond to the piezoelectric driving mechanism 3. Namely, the number of mounting seats 22, the number of position sensors 71, and the number of induction magnets 72 are identical to the number of piezoelectric driving mechanisms 3.

Alternatively, the mounting seats 22 are disposed on the sides of the corresponding set of piezoelectric driving mechanisms 3, preferably the mounting seats 22 are disposed on the sides of the corresponding piezoelectric grooves 21.

Alternatively, when the piezoelectric driving mechanisms 3 are three groups, the positional distribution strategy of the sensing magnet 72 and the position sensor 71 is the same as that of the three groups of piezoelectric driving mechanisms 3. For example, one position sensor 71 is also located on the middle vertical line of the connecting line of the other two position sensors 71, and the included angles between the three position sensors may be equal or unequal.

Optionally, the mounting base 22 is provided with a sensor recess in which the position sensor 71 is mounted.

Alternatively, the motor carrier 5 may be a direct AF motor, or a carrier for mounting an AF motor. The zooming effect of the lens is realized through the AF action of the AF motor.

Optionally, a circuit board 51 for supplying power to the AF motor is provided at the bottom end of the motor carrier 5, and the circuit board 51 protrudes from the base 2 and the housing 1 to communicate with an external circuit.

Alternatively, referring to fig. 3 and 4, one side of the frame 4 is provided with an FPC board escape groove 42. Referring to fig. 8, an FPC board mounting groove 43 is provided on the outer wall of the bottom end of the frame 4. Referring to fig. 2 to 6, the chassis 2 is provided with an FPC board stopper groove 23, and the FPC board stopper groove 23 is located outside the FPC board escape groove 42.

Referring to fig. 3 to 7, the circuit board 51 is an FPC board, which is protruded from the motor carrier 5, then is passed through the FPC board escape groove 42 to the FPC board limiting groove 23, and is passed through the FPC board mounting groove 43 to the outside of the chassis 2 after the FPC board limiting groove 23 is bent.

Alternatively, the FPC board mounting groove 43 may be a straight groove or a bending groove, and may be designed according to the specific structure of the frame 4, the base 2, or the housing 1. For example, as shown in fig. 8, the FPC board mounting groove 43 is a V-shaped bending groove.

While the preferred embodiments of the present utility model have been described in detail, it will be appreciated that those skilled in the art, upon reading the above teachings, may make various changes and modifications to the utility model. Such equivalents are also intended to fall within the scope of the claims appended hereto.

Claims (10)

1. The direct-acting piezoelectric opposite-pressing type holder comprises a shell, a base, a driving assembly, a frame, a motor carrier and a built-in circuit, wherein a hollow cavity is formed between the shell and the base, the motor carrier is arranged in the frame, and the driving assembly and the frame are arranged in the hollow cavity;

characterized in that the drive assembly comprises:

at least two groups of piezoelectric driving mechanisms are arranged on the base, are positioned outside the frame, are connected with the frame and are connected with a built-in circuit in the base, and the frame and the motor carrier are driven to swing relative to the base by electrifying at least two groups of piezoelectric driving mechanisms.

2. The direct-acting piezoelectric counter-pressure type cradle head according to claim 1, wherein the piezoelectric driving mechanisms are two groups, and the two groups of piezoelectric driving mechanisms are oppositely arranged outside the frame;

or, the piezoelectric driving mechanisms are three groups, one group of the piezoelectric driving mechanisms is positioned on the middle vertical line of the connecting line of the other two groups of the piezoelectric driving mechanisms, and the included angles among the three groups of the piezoelectric driving mechanisms are equal or unequal;

or the piezoelectric driving mechanisms are more than three groups, and the piezoelectric driving mechanisms are distributed on the periphery of the frame.

3. The direct-acting piezoelectric counter-pressure type holder according to claim 1 or 2, wherein the piezoelectric driving mechanism includes:

the two sides of the movable piece are respectively connected with the frame through reeds, and the outer side of the movable piece is provided with a wear-resistant piece;

the piezoelectric mechanism comprises a balancing weight, a piezoelectric block and a friction piece, wherein the balancing weight is arranged on the base, the top end of the balancing weight is provided with the piezoelectric block, the piezoelectric block is connected with the built-in circuit, the top end of the piezoelectric block is provided with the friction piece, and the friction piece is contacted with the wear-resistant piece.

4. The direct-acting piezoelectric counter-pressure type cradle head according to claim 3, wherein the base is provided with a piezoelectric groove, and the balancing weight is installed in the piezoelectric groove.

5. The direct-acting piezoelectric counter-pressure type cradle head according to claim 3, wherein a piezoelectric mechanism mounting groove is formed in the outer side of the frame, the movable member is mounted in the piezoelectric mechanism mounting groove, and an avoidance gap is formed between the inner wall of the movable member and the inner wall of the piezoelectric mechanism mounting groove.

6. The direct-acting piezoelectric counter-pressure type holder according to claim 3, wherein the reeds on both sides of the movable member are of an integral or split structure;

the reed and the wear-resistant piece are of an integrated or split structure; or (b)

The middle part of the reed is provided with a reed avoiding through hole, and the wear-resistant piece is positioned at the inner side of the reed avoiding through hole.

7. The direct-acting piezoelectric counter-pressure type cradle head according to claim 1, wherein a mounting seat is arranged on the base, and a position sensor is arranged on the mounting seat;

the frame is provided with an induction magnet which is arranged corresponding to the position sensor;

the number of the induction magnets and the number of the position sensors are at least two, and the induction magnets and the position sensors are arranged corresponding to the piezoelectric driving mechanism.

8. The direct-acting piezoelectric counter-pressure type holder according to claim 1, wherein the motor carrier is an AF motor or a carrier for mounting the AF motor.

9. The direct-acting piezoelectric counter-pressure type cradle head according to claim 8, wherein a circuit board for supplying power to the AF motor is arranged at the bottom end of the motor carrier, and the circuit board extends out of the base and the housing.

10. The direct-acting piezoelectric opposite-pressing type holder according to claim 9, wherein an FPC board avoiding groove is formed in one side of the frame, an FPC board mounting groove is formed in the outer wall of the bottom end of the frame, an FPC board limiting groove is formed in the base, and the FPC board limiting groove is located outside the FPC board avoiding groove;

the circuit board is the FPC board, the FPC board is followed after stretching out from the motor carrier, through the FPC board dodges the groove and wears out to the FPC board spacing groove after the bending of FPC board spacing groove is worn out to outside the base through the FPC board mounting groove.