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WO2023125415A1 - 致动器、驱动装置、摄像模组以及电子设备 - Google Patents

致动器、驱动装置、摄像模组以及电子设备 Download PDF

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Publication number
WO2023125415A1
WO2023125415A1 PCT/CN2022/141944 CN2022141944W WO2023125415A1 WO 2023125415 A1 WO2023125415 A1 WO 2023125415A1 CN 2022141944 W CN2022141944 W CN 2022141944W WO 2023125415 A1 WO2023125415 A1 WO 2023125415A1
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WO
WIPO (PCT)
Prior art keywords
actuator
piezoelectric ceramic
electrical connection
fixing
angle
Prior art date
Application number
PCT/CN2022/141944
Other languages
English (en)
French (fr)
Inventor
边心秀
时运来
张百亮
郑科
刘彬
李邓峰
唐玮
Original Assignee
华为技术有限公司
南京航空航天大学
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Publication date
Application filed by 华为技术有限公司, 南京航空航天大学 filed Critical 华为技术有限公司
Publication of WO2023125415A1 publication Critical patent/WO2023125415A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/0005—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing non-specific motion; Details common to machines covered by H02N2/02 - H02N2/16
    • H02N2/001—Driving devices, e.g. vibrators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
    • H02N2/04—Constructional details
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
    • H02N2/06—Drive circuits; Control arrangements or methods

Definitions

  • the present application relates to the technical field of actuators, and in particular to an actuator, a driving device, a camera module and electronic equipment.
  • the actuator has been researched by major research institutes and manufacturers.
  • the relatively complex structure of the traditional actuator and the relatively complicated excitation method of the piezoelectric ceramic it is difficult to apply the traditional actuator to products.
  • the present application proposes an actuator with a simple structure and relatively simple excitation methods for piezoelectric ceramics.
  • the present application provides an actuator, a driving device, a camera module and an electronic device with a simple structure and relatively simple excitation methods for piezoelectric ceramics.
  • the embodiment of the present application provides an actuator.
  • the actuator includes a metal plate, a first piezoelectric ceramic, and a second piezoelectric ceramic.
  • the metal plate includes a vibrating portion and a connecting portion, the connecting portion includes a peripheral side surface and a top surface and a bottom surface facing away from each other, the peripheral side surface is connected between the top surface and the bottom surface, and the vibrating portion connects On the peripheral side, the first piezoelectric ceramic fixes the top surface of the connection part, and the second piezoelectric ceramic fixes the bottom surface of the connection part.
  • the polarization direction of the first piezoelectric ceramic and the polarization direction of the second piezoelectric ceramic are the same as the stacking direction of the second piezoelectric ceramic, the metal plate and the first piezoelectric ceramic, so
  • the top surface of the first piezoelectric ceramic and the bottom surface of the second piezoelectric ceramic are used to electrically connect the first electrode terminal of the power supply, and the bottom surface of the first piezoelectric ceramic and the top surface of the second piezoelectric ceramic
  • the second electrode terminal for electrically connecting the power supply, any one of the first electrode terminal and the second electrode terminal is a positive terminal, and the other is a negative terminal.
  • the stacking direction of a piezoelectric ceramic is set to be the same, and the top surface of the first piezoelectric ceramic and the bottom surface of the second piezoelectric ceramic are used to electrically connect the first electrode end of the power supply, and the first piezoelectric ceramic
  • the bottom surface and the top surface of the second piezoelectric ceramic are used to electrically connect the second electrode terminal of the power supply, so that the expansion and contraction direction of the first piezoelectric ceramic is the same as that of the second piezoelectric ceramic, and then the first piezoelectric ceramic is used
  • the piezoelectric ceramic and the second piezoelectric ceramic vibrate the vibrating part of the metal plate.
  • the excitation method of the piezoelectric ceramics of the actuator in this embodiment is relatively simple, and it is easy to realize technically.
  • the number of parts of the actuator in this embodiment is small, the structure is simple, and the process is easy to realize, which is beneficial to miniaturization and installation.
  • the first piezoelectric ceramic and the second piezoelectric ceramic receive a first type of signal, and the vibrating part moves along the first The direction is bent.
  • the actuator is in the second working state, the first piezoelectric ceramic and the second piezoelectric ceramic receive a second type of signal, the vibrating part bends in a second direction, and the second type of signal Unlike the first signal, the first direction is different from the second direction.
  • the actuator of this embodiment can vibrate in two different directions.
  • the actuator can be used as the core component of the drive motor of the camera module, and the actuator has a better application prospect in the field of camera modules.
  • both the first signal and the second signal are square wave signals.
  • the actuator includes a first electrical connection wire, a second electrical connection wire, and a third electrical connection wire, and a first end of the first electrical connection wire is electrically connected to the first electrical connection wire.
  • the actuator includes a first electrical connection wire, a second electrical connection wire, a third electrical connection wire, and a fourth electrical connection wire.
  • the first end of the first electrical connection wire is electrically connected to the top surface of the first piezoelectric ceramic, and the second end of the first electrical connection wire is electrically connected to the bottom surface of the second piezoelectric ceramic, so The first end of the second electrical connection wire is electrically connected to the first electrical connection wire, and the second end of the second electrical connection wire is electrically connected to the first electrode end of the power supply.
  • the first end of the third electrical connection wire is electrically connected to the bottom surface of the first piezoelectric ceramic, and the second end of the third electrical connection wire is electrically connected to the top surface of the second piezoelectric ceramic, so The first end of the fourth electrical connection wire is electrically connected to the third electrical connection wire, and the second end of the fourth electrical connection wire is electrically connected to the second electrode end of the power supply.
  • the vibrating part includes a first surface, a second surface and a third surface connected in sequence, and the first surface and the third surface are both connected to the peripheral side surface of the connecting part .
  • the angle between the first surface and the second surface is a first angle
  • the angle between the third surface and the second surface is a second angle
  • the first surface and the peripheral side surface The angle between is the third angle
  • the angle between the third surface and the peripheral side is the fourth angle
  • the first angle, the second angle, the third angle and the fourth The angles are obtuse.
  • the vibrating portion of the actuator in this embodiment is roughly trapezoidal.
  • the vibrating portion of the present embodiment vibrates more easily than vibrating portions of other shapes, and is advantageous in increasing the amplitude of the vibration.
  • the first angle is equal to the third angle
  • the second angle is equal to the fourth angle
  • the metal plate is provided with a first through hole, and a part or all of the first through hole is located in the vibrating part.
  • the elasticity of the vibrating part can be improved, thereby greatly increasing the amplitude of the vibrating part.
  • the metal plate includes a first fixing part and a second fixing part
  • the peripheral side includes a first side and a second side facing away from each other
  • the vibrating part connects the first On the side
  • the first fixing portion and the second fixing portion are connected to the second side at intervals.
  • the actuator includes a fixing plate, and the first fixing portion and the second fixing portion are both fixed on the fixing plate.
  • the vibrating part includes a first vibrating part and a second vibrating part arranged at intervals, and the first vibrating part and the second vibrating part are used to clamp the outer part of the actuator. mover.
  • the first vibrating part includes a first driving arm and a first driving block, and the first driving arm is connected between the peripheral side of the connecting part and the first driving block
  • the second vibrating part includes a second driving arm and a second driving block
  • the second driving arm is connected between the peripheral side of the connecting part and the second driving block
  • the first driving block and the The second drive block is used to clamp the mover outside the actuator.
  • the first driving block and the second driving block are arranged close to each other, and the end of the first driving arm connected to the connecting part is set apart from the end of the second driving arm connected to the connecting part .
  • the first driving block has a first clamping surface facing the second driving block, and the first clamping surface is an arc surface.
  • the second driving block has a second clamping surface facing the first driving block, and the second clamping surface is an arc surface.
  • the metal plate includes a first fixing portion and a second fixing portion.
  • the peripheral side includes a first side and a second side facing away, and a third side and a fourth side facing away, and the third side and the fourth side are connected between the first side and the fourth side.
  • the first vibrating part and the second vibrating part are connected to the first side
  • the first fixing part is connected to the third side
  • the second fixing part is connected to the first four sides;
  • the actuator includes a fixing base, and the first fixing part and the second fixing part are fixed on the fixing base.
  • the fixing plate is provided with a first limiting hole and a second limiting hole arranged at intervals.
  • the first fixing part is plugged into the first limiting hole.
  • the second fixing part is plugged into the second limiting hole.
  • the metal plate is made of stainless steel or copper.
  • the vibration part when the actuator is in the non-working state, the vibration part does not bend, and the third signal is different from the first signal and the second signal .
  • the voltage of the third signal is zero.
  • the embodiment of the present application provides a driving device.
  • the driving device includes a base, a mover and the above-mentioned actuator.
  • the mover is slidably connected to the base, the actuator fixes the base, and the vibration part of the actuator is connected to the mover.
  • the mover is provided with a movable slot.
  • the driving device includes a shrapnel, and the shrapnel fixes the mover and straddles the movable slot.
  • the vibrating part of the actuator is connected to the elastic piece. The vibrating part of the actuator exerts a force on the elastic piece, and a part of the elastic piece deforms into the movable groove.
  • the mover is provided with a first rolling groove and a second rolling groove arranged at intervals
  • the base is further provided with a third rolling groove and a fourth rolling groove arranged at intervals.
  • the first rolling groove and the third rolling groove enclose a first rolling space
  • the second rolling groove and the fourth rolling groove enclose a second rolling space.
  • the driving device includes a first ball and a second ball , the first ball is rollingly connected in the first rolling space, and the second ball is rollingly connected in the second rolling space.
  • the embodiment of the present application provides a camera module.
  • the camera module includes the above-mentioned driving device.
  • the embodiment of the present application provides a camera module.
  • the camera module includes the actuator as described above.
  • the embodiment of the present application provides an electronic device.
  • the electronic device includes the above-mentioned camera module.
  • Fig. 1 is a schematic structural view of an embodiment of an actuator provided in an embodiment of the present application
  • Fig. 2 is an exploded schematic view of the actuator shown in Fig. 1;
  • Fig. 3 is a structural schematic view of the metal plate shown in Fig. 2 at another angle;
  • Fig. 4 is a schematic structural view of the metal plate shown in Fig. 2 at another angle;
  • Fig. 5 is a partial structural schematic diagram of the actuator shown in Fig. 1;
  • Fig. 6 is a schematic cross-sectional view of the actuator shown in Fig. 1 at line A-A;
  • Figure 7 is a schematic diagram of an embodiment of the electrical connection of the actuator shown in Figure 1;
  • Fig. 8 is a schematic simulation diagram of the actuator shown in Fig. 1 in a first working state
  • Fig. 9 is a schematic diagram of an embodiment of the first electrical signal, the first potential difference and the second potential difference of the electrical connection mode of the actuator shown in Fig. 7;
  • Fig. 10 is a schematic simulation diagram of the actuator shown in Fig. 1 in a second working state
  • Fig. 11 is a schematic diagram of an embodiment of the second electrical signal, the third potential difference and the fourth potential difference of the electrical connection mode of the actuator shown in Fig. 7;
  • Fig. 12 is a schematic diagram of an embodiment of the third electrical signal, the fifth potential difference and the sixth potential difference of the electrical connection mode of the actuator shown in Fig. 7;
  • Figure 13 is a schematic diagram of another embodiment of the electrical connection of the actuator shown in Figure 1;
  • Fig. 14 is a schematic structural view of an embodiment of a driving device provided in an embodiment of the present application.
  • Fig. 15 is a partially exploded schematic diagram of the driving device shown in Fig. 14;
  • Fig. 16 is a structural schematic view of the mover shown in Fig. 15 at different angles;
  • Fig. 17 is a partial structural schematic diagram of the driving device shown in Fig. 14;
  • Fig. 18 is a structural schematic view of the base shown in Fig. 15 at different angles;
  • Fig. 19 is a schematic cross-sectional view of the driving device shown in Fig. 14 on line B-B;
  • Fig. 20 is a schematic structural view of another embodiment of the actuator provided in the embodiment of the present application.
  • Figure 21 is an exploded schematic view of the actuator shown in Figure 20;
  • Fig. 22 is a structural schematic view of the metal plate of the actuator shown in Fig. 21 at another angle;
  • Fig. 23 is a structural schematic view of the metal plate of the actuator shown in Fig. 21 at another angle;
  • Fig. 24 is a partial structural schematic view of the actuator shown in Fig. 20;
  • Fig. 25 is a schematic simulation diagram of the actuator shown in Fig. 20 in a first working state
  • Fig. 26 is a schematic simulation diagram of the actuator shown in Fig. 25 at another angle;
  • Fig. 27 is a schematic simulation diagram of the actuator shown in Fig. 20 in a second working state
  • FIG. 28 is a schematic simulation diagram of the actuator shown in FIG. 27 at another angle.
  • connection should be understood in a broad sense, for example, “connection” can be a detachable connection or a non-detachable connection.
  • a connection either direct or indirect through an intermediary.
  • fixed connection means that they are connected to each other and the relative positional relationship after connection remains unchanged.
  • orientation terms mentioned in the embodiments of the present application such as “top”, “bottom”, etc., are only referring to the directions of the drawings. Therefore, the orientation terms used are for better and clearer description and understanding of the present application.
  • the embodiments do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
  • FIG. 1 is a schematic structural diagram of an implementation manner of an actuator 100a provided in an embodiment of the present application.
  • FIG. 2 is an exploded schematic view of the actuator 100a shown in FIG. 1 .
  • the actuator 100a includes a metal plate 10a, a first piezoelectric ceramic 20a, a second piezoelectric ceramic 30a, and a fixed plate 40a.
  • the direction in which the second piezoelectric ceramic 30 a , the metal plate 10 a and the first piezoelectric ceramic 20 a are stacked sequentially is the positive direction of the Z axis.
  • the longitudinal direction of the metal plate 10a is the Y-axis direction.
  • the width direction of the metal plate 10a is the X-axis direction.
  • the positive direction of the Z axis is defined as the first direction.
  • the negative direction of the Z axis is the second direction.
  • the setting of the coordinate axes of the actuator 100a can be flexibly set as required. No specific limitation is made here.
  • the stacking direction of the second piezoelectric ceramic 30a, the metal plate 10a and the first piezoelectric ceramic 20a includes two situations: one is that the second piezoelectric ceramic 30a, the metal plate 10a and the first piezoelectric ceramic
  • the stacking direction of 20a is the positive direction of the Z axis.
  • the other is the direction in which the first piezoelectric ceramic 20a, the metal plate 10a and the second piezoelectric ceramic 30a are stacked in sequence, that is, the negative direction of the Z axis.
  • the material of the metal plate 10a may be stainless steel or copper.
  • FIG. 3 is a structural schematic view of the metal plate 10 a shown in FIG. 2 at another angle.
  • the metal plate 10a includes a vibration part 11a, a connection part 12a, a first fixing part 13a, and a second fixing part 14a.
  • Fig. 2 and Fig. 3 schematically distinguish the vibrating part 11a, the connecting part 12a, the first fixing part 13a and the second fixing part 14a by dotted lines.
  • the connecting portion 12a includes a peripheral side surface 120a and a top surface 121a and a bottom surface 122a disposed opposite to each other.
  • the peripheral side 120a is connected between the top surface 121a and the bottom surface 122a.
  • the peripheral side 120a includes a first side 123a and a second side 124a disposed opposite to each other.
  • the first side 123a and the second side 124a are connected between the top surface 121a and the bottom surface 122a.
  • the shape of the peripheral side surface 120a is not specifically limited.
  • the vibrating part 11a is connected to the first side surface 123a of the connecting part 12a.
  • the first fixing part 13 a and the second fixing part 14 a are connected to the second side surface 124 a of the connecting part 12 a at intervals.
  • the first fixing portion 13 a and the second fixing portion 14 a may also be connected to other positions of the peripheral side surface 120 a at intervals.
  • the metal plate 10a is provided with a first through hole 114a.
  • a part of the first through hole 114a is located at the vibrating part 11a of the metal plate 10a, and a part is located at the connecting part 12a of the metal plate 10a.
  • all the first through holes 114a may be located in the vibrating portion 11a of the metal plate 10a.
  • the metal plate 10a may not be provided with the first through hole 114a.
  • FIG. 4 is a structural diagram of the metal plate 10 a shown in FIG. 2 at another angle.
  • the vibration part 11a of the metal plate 10a includes a first surface 111a, a second surface 112a and a third surface 113a connected in sequence, that is, the second surface 112a is connected between the first surface 111a and the third surface 113a. Both the first surface 111a and the third surface 113a of the vibration part 11a are connected to the first side surface 123a of the connection part 12a.
  • the angle between the first surface 111a and the second surface 112a is a first angle a.
  • the first angle a is an obtuse angle.
  • the angle between the third surface 113a and the second surface 112a is a second angle b.
  • the second angle b is an obtuse angle.
  • the angle between the first surface 111a and the first side surface 123a of the connecting portion 12a is a third angle c.
  • the third angle c is an obtuse angle.
  • the angle between the third surface 113a and the first side surface 123a of the connecting portion 12a is a fourth angle d.
  • the fourth angle d is an obtuse angle.
  • the first angle a is equal to the third angle c.
  • the second angle b is equal to the fourth angle d.
  • FIG. 5 is a partial structural schematic view of the actuator 100 a shown in FIG. 1 .
  • the first piezoelectric ceramic 20a is fixed on the top surface 121a of the connecting portion 12a.
  • the second piezoelectric ceramic 30a is fixed on the bottom surface 122a of the connecting portion 12a.
  • the connecting portion 12a of the metal plate 10a is located between the first piezoelectric ceramic 20a and the second piezoelectric ceramic 30a.
  • the first piezoelectric ceramic 20a can be fixed on the top surface 121a of the connecting portion 12a by glue.
  • the glue can be epoxy glue.
  • the second piezoelectric ceramic 30a can be fixed on the bottom surface 122a of the connecting portion 12a by glue.
  • the glue can be epoxy glue.
  • the polarization direction of the first piezoelectric ceramic 20a is parallel to the thickness direction of the first piezoelectric ceramic 20a.
  • the polarization direction of the second piezoelectric ceramic 30a is parallel to the thickness direction of the second piezoelectric ceramic 30a. It can be understood that, when both the first piezoelectric ceramic 20a and the second piezoelectric ceramic 30a are installed on the connecting portion 12a of the metal plate 10a, the polarization direction of the second piezoelectric ceramic 30a is consistent with that of the first piezoelectric ceramic 20a. direction in the same direction.
  • the polarization direction of the first piezoelectric ceramic 20 a and the polarization direction of the second piezoelectric ceramic 30 a are both parallel to the positive direction of the Z axis. It should be noted that, FIG. 5 schematically shows the polarization direction of the first piezoelectric ceramic 20 a through arrows with solid lines. Fig. 5 schematically shows the direction of the polarization direction of the second piezoelectric ceramic 30a by arrows with dotted lines. In other embodiments, the polarization direction of the first piezoelectric ceramic 20 a and the polarization direction of the second piezoelectric ceramic 30 a may also be parallel to the negative direction of the Z axis.
  • the projection of the first piezoelectric ceramic 20a on the top surface 121a of the connecting portion 12a coincides with the projection of the second piezoelectric ceramic 30a on the top surface 121a of the connecting portion 12a.
  • the fixing plate 40a includes a first plate surface 41a and a second plate surface 42a facing away from each other, and a peripheral side surface 43a connected between the first plate surface 41a and the second plate surface 42a.
  • the fixing plate 40a is provided with a first limiting hole 44a and a second limiting hole 45a arranged at intervals. Wherein, both the first limiting hole 44a and the second limiting hole 45a penetrate from the first plate surface 41a of the fixing plate 40a to the second plate surface 42a of the fixing plate 40a.
  • the second limiting hole 45a can also pass through the peripheral side surface 43a of the fixing plate 40a.
  • the second limiting hole 45a may not pass through the peripheral side surface 43a of the fixing plate 40a.
  • the fixing plate 40a may not be provided with the first limiting hole 44a and the second limiting hole 45a arranged at intervals.
  • FIG. 6 is a schematic cross-sectional view of the actuator 100 a shown in FIG. 1 at line A-A.
  • the first fixing portion 13a of the metal plate 10a is plugged into the first limiting hole 44a of the fixing plate 40a.
  • the second fixing portion 14a of the metal plate 10a is inserted into the second limiting hole 45a of the fixing plate 40a.
  • the first fixing part 13a and the second fixing part 14a of the metal plate 10a are fixed to the fixing plate 40a.
  • the connection manner between the first fixing portion 13a and the second fixing portion 14a of the metal plate 10a and the fixing plate 40a is not specifically limited.
  • the first fixing portion 13a and the second fixing portion 14a of the metal plate 10a can be fixedly connected to the fixing plate 40a by buckling.
  • glue may be provided between the first fixing portion 13a of the metal plate 10a and the hole wall of the first limiting hole 44a.
  • the glue can make the connection between the first fixing portion 13a of the metal plate 10a and the fixing plate 40a more firm.
  • the connection between the first fixing portion 13a of the metal plate 10a and the hole wall of the first limiting hole 44a can also be realized by spot welding.
  • glue may also be provided between the second fixing portion 14a of the metal plate 10a and the hole wall of the second limiting hole 45a.
  • the glue can make the connection between the second fixing portion 14a of the metal plate 10a and the fixing plate 40a more firm.
  • the connection between the second fixing portion 14a of the metal plate 10a and the hole wall of the second limiting hole 45a can also be realized by spot welding.
  • FIG. 7 is a schematic diagram of an embodiment of the electrical connection of the actuator 100 a shown in FIG. 1 .
  • the actuator 100a includes a first electrical connection wire 51a, a second electrical connection wire 52a and a third electrical connection wire 53a.
  • a first end of the first electrical connection wire 51a is electrically connected to the top surface 21a of the first piezoelectric ceramic 20a.
  • the second end of the first electrical connection wire 51a is electrically connected to the bottom surface 32a of the second piezoelectric ceramic 30a.
  • the first end of the second electrical connection wire 52a is electrically connected to the first electrical connection wire 51a.
  • the second end of the second electrical connection wire 52a is electrically connected to the positive end 541a of the power source 54a (also referred to as the first electrode end of the power source 54a).
  • a first end of the third electrical connection wire 53a is electrically connected to the metal plate 10a.
  • the second end of the third electrical connecting wire 53a is electrically connected to the negative end 542a of the power source 54a (also referred to as the second electrode end of the power source 54a).
  • the power source 54a, the second electrical connection wire 52a, the first electrical connection wire 51a, the first piezoelectric ceramic 20a, the metal plate 10a, the second piezoelectric ceramic 30a and the third electrical connection wire 53a form a current loop.
  • the second end of the second electrical connection wire 52a may be electrically connected to the negative end 542a of the power source 54a.
  • the second end of the third electrical connecting wire 53a can be electrically connected to the positive end 541a of the power source 54a.
  • the first piezoelectric ceramic 20a forms a first potential difference under the first electric signal u1(t)
  • the second piezoelectric ceramic 30a forms a second potential difference under the first electric signal u1(t)
  • the first piezoelectric ceramic 20a at the first potential difference Next, the first stretch occurs.
  • the second piezoelectric ceramic 30a is at the second potential difference Next, the second expansion occurs.
  • the first stretching direction of the first piezoelectric ceramic 20a and the second stretching direction of the second piezoelectric ceramic 30a may be the same.
  • FIG. 8 is a schematic simulation diagram of the actuator 100 a shown in FIG. 1 in a first working state.
  • the vibrating portion 11a of the metal plate 10a is bent in the first direction by the first expansion and contraction of the first piezoelectric ceramic 20a and the second expansion and contraction of the second piezoelectric ceramic 30a.
  • the actuator 100a is in a first working state.
  • the first direction is the positive direction of the Z axis.
  • Fig. 9 is the first electrical signal u1(t), the first potential difference of the electrical connection mode of the actuator 100a shown in Fig. 7 and the second potential difference
  • the first signal u1(t) is a pulse width modulation (PWM) signal.
  • the first signal u1(t) is a square wave signal.
  • the maximum voltage of the first signal u1(t) may be 50V.
  • the minimum voltage value of the first signal u1(t) may be 0V.
  • the ratio of the time length of the maximum voltage value of the first signal u1(t) to the time length of the minimum voltage value of the first signal u1(t) may be 70%.
  • the first potential difference The maximum voltage can be 50V.
  • first potential difference The minimum value of the voltage can be 0V.
  • second potential difference The minimum voltage can be -50V.
  • second potential difference The maximum voltage can be 0V.
  • the first piezoelectric ceramic 20a forms a third potential difference under the second electrical signal u2(t)
  • the second piezoelectric ceramic 30a forms a fourth potential difference under the second electric signal u2(t)
  • the first piezoelectric ceramic 20a is at the third potential difference
  • the third stretch is generated.
  • the second piezoelectric ceramic 30a is at the fourth potential difference Next, the fourth stretch is generated.
  • the direction of the fourth expansion and contraction is the same as the direction of the third expansion and contraction.
  • the direction of the third expansion and contraction may be different from the direction of the first expansion and contraction.
  • FIG. 10 is a schematic simulation diagram of the actuator 100 a shown in FIG. 1 in a second working state.
  • the vibrating portion 11a of the metal plate 10a is bent in the second direction by the third expansion and contraction of the first piezoelectric ceramic 20a and the fourth expansion and contraction of the second piezoelectric ceramic 30a.
  • the actuator 100a is in the second working state.
  • the second direction is the negative direction of the Z axis.
  • Fig. 11 is the second electrical signal u2(t), the third potential difference of the electrical connection mode of the actuator 100a shown in Fig. 7 and the fourth potential difference
  • the second signal u2(t) is a PWM signal.
  • the second signal u2(t) is a square wave signal.
  • the minimum voltage value of the second signal u2(t) may be -50V.
  • the maximum voltage of the second signal u2(t) may be 0V.
  • the ratio of the time length of the minimum voltage value of the second type signal u2(t) to the time length of the maximum voltage value of the first type signal u1(t) may be 70%.
  • the third potential difference The minimum voltage can be -50V.
  • third potential difference The maximum voltage can be 0V.
  • fourth potential difference The maximum voltage can be 50V. fourth potential difference The minimum value of the voltage can be 0V.
  • the power supply 54a sends a third electrical signal to the first piezoelectric ceramic 20a and the second piezoelectric ceramic 30a through the first electrical connection line 51a, the second electrical connection line 52a and the third electrical connection line 53a
  • the first piezoelectric ceramic 20a forms a fifth potential difference under the third electrical signal u3(t).
  • the second piezoelectric ceramic 30a forms a sixth potential difference under the third electric signal u3(t)
  • the first piezoelectric ceramic 20a is at the fifth potential difference Down, there will be no expansion and contraction.
  • the second piezoelectric ceramic 30a is at the sixth potential difference Down, there will be no expansion and contraction.
  • the vibration part 11a of the metal plate 10a is not bent.
  • the actuator 100a is in an inoperative state.
  • Fig. 12 is the third electrical signal u3(t), the fifth potential difference of the electrical connection mode of the actuator 100a shown in Fig. 7 and the sixth potential difference A schematic diagram of one embodiment.
  • the third electrical signal u3(t) is equal to zero.
  • the fifth potential difference and the sixth potential difference Both are equal to 0.
  • FIG. 13 is a schematic diagram of another embodiment of the electrical connection of the actuator 100 a shown in FIG. 1 .
  • the actuator 100a includes a first electrical connection wire 51b, a second electrical connection wire 52b, a third electrical connection wire 53b and a fourth electrical connection wire 54b.
  • a first end of the first electrical connection wire 51b is electrically connected to the top surface 21a of the first piezoelectric ceramic 20a.
  • the second end of the first electrical connection wire 51b is electrically connected to the bottom surface 32a of the second piezoelectric ceramic 30a.
  • the first end of the second electrical connection wire 52b is electrically connected to the first electrical connection wire 51b.
  • the second end of the second electrical connection wire 52b is electrically connected to the positive end 541a of the power source 54a (also referred to as the first electrode end of the power source 54a).
  • first end of the third electrical connection wire 53b is electrically connected to the bottom surface 22a of the first piezoelectric ceramic 20a.
  • the bottom surface 22a of the first piezoelectric ceramic 20a and the top surface 21a of the first piezoelectric ceramic 20a are two surfaces facing away from each other.
  • the second end of the third electrical connection wire 53b is electrically connected to the top surface 31a of the second piezoelectric ceramic 30a.
  • the top surface 31a of the second piezoelectric ceramic 30a and the bottom surface 32a of the second piezoelectric ceramic 30a are two surfaces facing away from each other.
  • the first end of the fourth electrical connection wire 54b is electrically connected to the third electrical connection wire 53b.
  • the second end of the fourth electrical connection wire 54b is electrically connected to the negative end 542a of the power source 54a (also referred to as the second electrode end of the power source 54a).
  • the power source 54a, the second electrical connection wire 52b, the first electrical connection wire 51b, the first piezoelectric ceramic 20a, the third electrical connection wire 53b and the fourth electrical connection wire 54b can form a first current loop.
  • the power source 54a, the second electrical connection wire 52b, the first electrical connection wire 51b, the second piezoelectric ceramic 30a, the third electrical connection wire 53b and the fourth electrical connection wire 54b can form a second current loop.
  • the second end of the second electrical connection wire 52b may also be electrically connected to the negative end 542a of the power supply 54a.
  • the second end of the fourth electrical connection wire 54b can also be electrically connected to the positive end 541a of the power supply 54a.
  • first current loop and the second current loop can share the same power source 54a, and at this time, the first piezoelectric ceramic 20a and the second piezoelectric ceramic 30a can receive the same electrical signal at the same time.
  • the first electrical signal can pass through the first electrical connection line 51b, the second electrical connection line 52b, the third electrical connection line 53b and the fourth electrical connection line 54b acts on the first piezoelectric ceramic 20a, and can also act on the second piezoelectric ceramic 30a via the first electrical connection wire 51b, the second electrical connection wire 52b, the third electrical connection wire 53b and the fourth electrical connection wire 54b.
  • the first piezoelectric ceramic 20a forms a first potential difference under the first electrical signal
  • the second piezoelectric ceramic 30a forms a second potential difference under the first electrical signal. In this way, the first piezoelectric ceramic 20a produces the first expansion and contraction under the first potential difference.
  • the second piezoelectric ceramic 30a produces a second expansion and contraction under the second potential difference.
  • the direction of the first expansion and contraction is the same as the direction of the second expansion and contraction.
  • the vibrating portion 11a of the metal plate 10a is bent in the first direction by the first expansion and contraction of the first piezoelectric ceramic 20a and the second expansion and contraction of the second piezoelectric ceramic 30a.
  • the actuator 100a is in a first working state.
  • the first direction is the positive direction of the Z axis.
  • the first type of electrical signal transmitted by the power source 54a in this embodiment may refer to the first type of electrical signal u1(t) transmitted by the power source 54a in the above embodiment. Specifically, it will not be repeated here.
  • the second electrical signal can act on The first piezoelectric ceramic 20a via the first electrical connection wire 51b, the second electrical connection wire 52b, the third electrical connection wire 53b and the fourth electrical connection wire 54b.
  • the first piezoelectric ceramic 20a forms a third potential difference under the second type of electrical signal
  • the second piezoelectric ceramic 30a forms a fourth potential difference under the second type of electrical signal. In this way, the first piezoelectric ceramic 20a produces the third expansion and contraction under the third potential difference.
  • the second piezoelectric ceramic 30a produces fourth expansion and contraction under the fourth potential difference.
  • the direction of the fourth expansion and contraction may be the same as the direction of the third expansion and contraction.
  • the direction of the third expansion and contraction may be different from the direction of the first expansion and contraction.
  • the vibrating portion 11a of the metal plate 10a is bent in the second direction by the third expansion and contraction of the first piezoelectric ceramic 20a and the fourth expansion and contraction of the second piezoelectric ceramic 30a.
  • the actuator 100a is in the second working state.
  • the second direction is the negative direction of the Z axis.
  • the second electrical signal u2(t) transmitted by the power source 54a in this embodiment may refer to the second electrical signal transmitted by the power source 54a in the above embodiment. Specifically, it will not be repeated here.
  • the first piezoelectric ceramic 20a forms a fifth potential difference under the third electrical signal u3(t).
  • the second piezoelectric ceramic 30a forms a sixth potential difference under the third electric signal u3(t) In this way, the first piezoelectric ceramic 20a is at the fifth potential difference Down, there will be no expansion and contraction.
  • the second piezoelectric ceramic 30a is at the sixth potential difference Down, there will be no expansion and contraction.
  • the vibration part 11a of the metal plate 10a is not bent.
  • the actuator 100a is in an inoperative state.
  • the setting method of the third electrical signal, the fifth potential difference and the sixth potential difference in this embodiment can refer to the third electrical signal u3(t), the fifth potential difference above and the sixth potential difference setting method. I won't go into details here.
  • FIG. 14 is a schematic structural diagram of an implementation manner of the driving device 1 provided in the embodiment of the present application.
  • FIG. 15 is a partially exploded schematic view of the driving device 1 shown in FIG. 14 .
  • the driving device 1 includes an actuator 100 a , a base 200 , an elastic piece 300 , a mover 400 , a first ball 501 and a second ball 502 .
  • FIG. 16 is a structural schematic view of the mover 400 shown in FIG. 15 at different angles.
  • the mover 400 includes a first surface 401 and a second surface 402 disposed opposite to each other.
  • the mover 400 is provided with a fixed column 403 .
  • the fixing post 403 protrudes from the first surface 401 .
  • the number of fixing columns 403 is not limited to four as shown in FIG. 16 . Specifically, the number of fixing columns 403 is not limited.
  • the mover 400 is provided with an active slot 404 .
  • the opening of the movable groove 404 is located on the first surface 401 .
  • multiple fixing columns 403 may be arranged around the movable slot 404 .
  • the mover 400 is provided with a first rolling groove 405 and a second rolling groove 406 arranged at intervals. Openings of the first rolling groove 405 and the second rolling groove 406 are located on the second surface 402 .
  • FIG. 17 is a partial structural diagram of the driving device 1 shown in FIG. 14 .
  • the elastic piece 300 is provided with a fixing hole 301 .
  • the number of fixing holes 301 may be the same as the number of fixing columns 403 of the mover 400 .
  • the elastic piece 300 fixes the first surface 401 of the mover 400 , and the elastic piece 300 straddles the movable slot 404 .
  • a part of the elastic piece 300 is disposed opposite to the movable slot 404 of the mover 400 .
  • the fixing post 403 of the mover 400 passes through the fixing hole 301 of the elastic sheet 300 .
  • the fixing post 403 of the mover 400 can be interference-fitted with the hole wall of the fixing hole 301 of the elastic piece 300 .
  • the fixing post 403 of the mover 400 passes through the fixing hole 301 of the elastic sheet 300 .
  • Glue is provided between the fixing column 403 of the mover 400 and the fixing hole 301 of the elastic piece 300 to make the connection firmness of the elastic piece 300 and the mover 400 better.
  • FIG. 18 is a structural schematic view of the base 200 shown in FIG. 15 at different angles.
  • the base 200 encloses an installation space 201 .
  • the base 200 has a fixing frame 202 .
  • the fixing frame 202 is located in the installation space 201 .
  • the base 200 is further provided with a third rolling groove 203 and a fourth rolling groove 204 arranged at intervals. Both the third rolling groove 203 and the fourth rolling groove 204 are located in the installation space 201 .
  • FIG. 19 is a schematic cross-sectional view of the driving device 1 shown in FIG. 14 along line B-B.
  • the mover 400 is slidably connected to the base 200 and located in the installation space 201 of the base 200 .
  • the first rolling groove 405 of the mover 400 and the third rolling groove 203 of the base 200 enclose the first rolling space 205 .
  • the second rolling groove 406 of the mover 400 and the fourth rolling groove 204 of the base 200 enclose the second rolling space 206 .
  • first ball 501 is disposed in the first rolling space 205 .
  • the second ball 502 is disposed in the second rolling space 206 . It can be understood that when the mover 400 slides relative to the base 200 , the first ball 501 can roll in the first rolling space 205 , and the second ball 502 can roll in the second rolling space 206 . By arranging the first ball 501 and the second ball 502 , the frictional force on the mover 400 can be reduced.
  • a sliding mechanism (such as a matching structure of a sliding rail and a sliding bar) may be provided between the mover 400 and the base 200 to make the mover 400 more stable during the sliding process relative to the base 200 .
  • the actuator 100 a fixes the base 200 .
  • the fixing plate 40a of the actuator 100a may be fixed on the fixing frame 202 of the base 200 by glue or the like.
  • the vibrating portion 11 a of the metal plate 10 a of the actuator 100 a is in contact with the elastic piece 300 .
  • the vibrating portion 11 a of the metal plate 10 a exerts a force on the elastic piece 300 .
  • the vibrating portion 11 a of the metal plate 10 a can press the elastic piece 300 so that a part of the elastic piece 300 is deformed into the movable groove 404 .
  • the movable slot 404 of the mover 400 can provide a deformation space for the shrapnel 300 .
  • the vibrating part 11a of the metal plate 10a first applies a force to the elastic piece 300 in advance. Then fix the fixing plate 40 a of the actuator 100 a to the fixing frame 202 of the base 200 .
  • the vibrating part 11a of the metal plate 10a is bent along the positive direction of the Z-axis, and the vibrating part 11a of the metal plate 10a can be
  • the mover 400 is driven by the shrapnel 300 to slide relative to the base 200 along the positive direction of the Z axis.
  • the vibrating part 11a of the metal plate 10a is bent along the negative direction of the Z-axis, and the vibrating part 11a of the metal plate 10a can be moved by the elastic piece 300
  • the sub 400 slides relative to the base 200 along the negative direction of the Z axis.
  • the driving device 1 can be applied in a camera module, that is, the camera module includes the driving device 1 .
  • the driving device 1 can be used as a driving motor of the camera module.
  • the driving motor is used to drive the lens to move along the optical axis, so that the camera module realizes focusing.
  • the camera module can be applied to an electronic device so that the electronic device has a camera function, that is, the electronic device includes a camera module.
  • the electronic device can be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a camera, a personal computer, a notebook computer, a vehicle-mounted device, a wearable device, etc. , augmented reality (augmented reality, AR) glasses, AR helmet, virtual reality (virtual reality, VR) glasses or VR helmet.
  • PDA personal digital assistant
  • the driving device 1 can also be applied to other modules, such as a motor module, that is, the motor module includes the driving device 1 .
  • the actuator 100a can also be directly applied to the camera module, that is, the camera module includes the above-mentioned actuator 100a. Or it can be directly applied to other modules, such as motor modules.
  • the structure of the actuator 100a and the driving device 1 has been specifically introduced above in conjunction with the relevant drawings.
  • a structure of the actuator 100a will be introduced in detail below in conjunction with related drawings.
  • Fig. 20 is a schematic structural diagram of another embodiment of the actuator 100a provided by the embodiment of the present application.
  • FIG. 21 is an exploded schematic view of the actuator 100a shown in FIG. 20 .
  • the actuator 100a includes a metal plate 10a, a first piezoelectric ceramic 20a, a second piezoelectric ceramic 30a, and a fixing seat 40b.
  • the metal plate 10a is made of stainless steel or copper.
  • FIG. 22 is a structural schematic view of the metal plate 10 a of the actuator 100 a shown in FIG. 21 at another angle.
  • the metal plate 10a includes a vibration part 11a, a connection part 12a, a first fixing part 13a, and a second fixing part 13b.
  • the vibrating part 11 a includes a first vibrating part 11 b and a second vibrating part 11 c arranged at intervals.
  • 21 and 22 schematically distinguish the first vibrating part 11b, the second vibrating part 11c, the connecting part 12a, the first fixing part 13a and the second fixing part 13b by dotted lines.
  • the connecting portion 12a includes a peripheral side 120a and a top surface 121a and a bottom surface 122a disposed opposite to each other.
  • the peripheral side 120a is connected between the top surface 121a and the bottom surface 122a.
  • the peripheral side 120a includes a first side 123a and a second side 124a facing away from each other, and a third side 125a and a fourth side 126a facing away from each other.
  • the first side 123a and the second side 124a are connected between the top surface 121a and the bottom surface 122a.
  • the third side 125a and the fourth side 126a are connected between the top surface 121a and the bottom surface 122a.
  • the third side 125a and the fourth side 126a are also connected between the first side 123a and the second side 124a.
  • the shape of the peripheral side surface 120a is not specifically limited.
  • first vibrating part 11b and the second vibrating part 11c are connected to the first side surface 123a of the connecting part 12a at intervals. A space is formed between the first vibrating portion 11b and the second vibrating portion 11c. The first vibrating part 11b is disposed opposite to the second vibrating part 11c.
  • the first fixing portion 13a is connected to the third side 125a of the connecting portion 12a.
  • the second fixing portion 13b is connected to the fourth side 126a of the connecting portion 12a.
  • both the first fixing portion 13a and the second fixing portion 13b may also be fixedly connected to the second side surface 124a.
  • any one of the first fixing portion 13a and the second fixing portion 13b is fixed on the third side 125a or the fourth side 126a, and the other is fixedly connected to the second side 124a.
  • FIG. 23 is a structural schematic view of the metal plate 10 a of the actuator 100 a shown in FIG. 21 at another angle.
  • the first vibration part 11b includes a first driving arm 111b and a first driving mass 112b.
  • a first end of the first driving arm 111b is connected to the first side surface 123a of the connecting portion 12a.
  • the second end of the first driving arm 111b is connected to the first driving block 112b.
  • the second vibrating part 11c includes a second driving arm 111c and a second driving mass 112c.
  • a first end of the second driving arm 111c is connected to the first side 123a of the connecting portion 12a.
  • the second end of the second driving arm 111c is connected to the second driving block 112c.
  • first end of the first driving arm 111b and the first end of the second driving arm 111c are set away from each other, that is, are set apart.
  • the second end of the first driving arm 111b and the second end of the second driving arm 111c are arranged close to each other, that is, arranged close together.
  • the first driving block 112b has a first clamping surface 113b facing the second driving block 112c.
  • the first clamping surface 113b is an arc surface.
  • the second driving block 112c has a second clamping surface 113c facing the first driving block 112b.
  • the second clamping surface 113c is opposite to the first clamping surface 113b.
  • the second clamping surface 113c is an arc surface.
  • FIG. 24 is a partial structural diagram of the actuator 100 a shown in FIG. 20 .
  • the first piezoelectric ceramic 20a is fixed on the top surface 121a of the connecting portion 12a.
  • the second piezoelectric ceramic 30a is fixed on the bottom surface 122a of the connecting portion 12a. It can be understood that the arrangement of the first piezoelectric ceramic 20a and the second piezoelectric ceramic 30a in this embodiment can refer to the arrangement of the first piezoelectric ceramic 20a and the second piezoelectric ceramic 30a in the first embodiment. Specifically, it will not be repeated here.
  • the electrical connection method between the first piezoelectric ceramic 20a, the second piezoelectric ceramic 30a and the power source in this embodiment can refer to the electrical connection between the first piezoelectric ceramic 20a, the second piezoelectric ceramic 30a and the power source in the first embodiment. connection method. Specifically, it will not be repeated here.
  • the fixing seat 40b may include a bottom plate 41b and a retaining wall 42b.
  • the retaining wall 42b is connected to a portion of the periphery of the bottom plate 41b.
  • the retaining wall 42b and the bottom plate 41b enclose an accommodating space 43b. It should be noted that in FIG. 21 , the bottom plate 41b and the retaining wall 42b are schematically distinguished by dotted lines.
  • the retaining wall 42b is provided with a first side hole 421b and a second side hole 422b that are spaced apart and opposite to each other.
  • the first side hole 421b and the second side hole 422b communicate with the receiving space 43b.
  • the metal plate 10a, the first piezoelectric ceramic 20a and the second piezoelectric ceramic 30a are arranged in the accommodation space 43b.
  • the first fixing portion 13a of the metal plate 10a is fixed to the retaining wall 42b of the fixing seat 40b, and is located at the first side hole 421b.
  • the second fixing portion 13b of the metal plate 10a is fixed to the retaining wall 42b of the fixing seat 40b, and is located at the second side hole 422b.
  • the first fixing portion 13a of the metal plate 10a may be fixed to the hole wall of the first side hole 421b by glue.
  • the second fixing portion 13b of the metal plate 10a can be fixed to the hole wall of the second side hole 422b by glue.
  • the first fixing portion 13a of the metal plate 10a may also be fixed to the hole wall of the first side hole 421b by spot welding.
  • the second fixing portion 13b of the metal plate 10a can also be fixed to the hole wall of the second side hole 422b by spot welding.
  • the first piezoelectric ceramic 20a when the first piezoelectric ceramic 20a receives the first electrical signal, the first piezoelectric ceramic 20a forms a first potential difference under the first electrical signal.
  • the second piezoelectric ceramic 30a receives the first electrical signal, the second piezoelectric ceramic 30a forms a second potential difference under the first electrical signal.
  • the first piezoelectric ceramic 20a produces the first expansion and contraction under the first potential difference.
  • the second piezoelectric ceramic 30a produces a second expansion and contraction under the second potential difference.
  • the direction of the first expansion and contraction may be the same as the direction of the second expansion and contraction.
  • FIG. 25 is a schematic simulation diagram of the actuator 100a shown in FIG. 20 in the first working state.
  • FIG. 26 is a schematic simulation diagram of the actuator 100a shown in FIG. 25 at another angle.
  • the first vibrating part 11b and the second vibrating part 11c bend along the first direction under the action of the first expansion and contraction of the first piezoelectric ceramic 20a and the second expansion and contraction of the second piezoelectric ceramic 30a on the metal plate 10a.
  • the actuator 100a is in a first working state.
  • the first direction is the positive direction of the Z axis.
  • the first piezoelectric ceramic 20a when the first piezoelectric ceramic 20a receives the second electrical signal, the first piezoelectric ceramic 20a forms a third potential difference under the second electrical signal.
  • the second piezoelectric ceramic 30a receives the second electrical signal, the second piezoelectric ceramic 30a forms a fourth potential difference under the second electrical signal.
  • the first piezoelectric ceramic 20a produces the third expansion and contraction under the third potential difference.
  • the second piezoelectric ceramic 30a produces fourth expansion and contraction under the fourth potential difference.
  • the direction of the fourth expansion and contraction may be the same as the direction of the third expansion and contraction.
  • the direction of the third expansion and contraction may be different from the direction of the first expansion and contraction.
  • FIG. 27 is a schematic simulation diagram of the actuator 100a shown in FIG. 20 in the second working state.
  • FIG. 28 is a schematic simulation diagram of the actuator 100a shown in FIG. 27 at another angle.
  • the first vibrating portion 11 b and the second vibrating portion 11 c are bent in the second direction by the first expansion and contraction of the first piezoelectric ceramic 20 a and the second expansion and contraction of the second piezoelectric ceramic 30 a on the metal plate 10 a.
  • the actuator 100a is in the second working state.
  • the second direction is the negative direction of the Z axis.
  • the first piezoelectric ceramic 20a and the second piezoelectric ceramic 30a receive the third electrical signal
  • the first piezoelectric ceramic 20a and the second piezoelectric ceramic 30a will not produce stretch.
  • the vibration part 11a of the metal plate 10a is not bent.
  • the actuator 100a is in an inoperative state. It can be understood that, for the third type of electrical signal in this embodiment, refer to the third type of electrical signal u3(t) in the foregoing embodiment. Specifically, it will not be repeated here.
  • the actuator 100 a of this embodiment can also be applied to the driving device 1 .
  • the first driving block 112b and the second driving block 112c of the actuator 100a can be directly used to clamp the mover 400 of the driving device 1 (see FIG. 19 ).
  • a protrusion (not shown) is protruded on the first side 401 of the mover 400 (refer to FIG. 19 ).
  • the first driving block 112b and the second driving block 112c can directly clamp the protrusion.
  • the first vibrating portion 11 b and the second vibrating portion 11 c of the metal plate 10 a can be used to clamp the mover 400 of the driving device 1 .
  • the first vibrating part 11b and the second vibrating part 11c of the metal plate 10a bend along the positive direction of the Z axis, and the first vibrating part 11b and the second vibrating part 11c of the metal plate 10a vibrate
  • the portion 11c can drive the mover 400 to slide relative to the base 200 along the positive direction of the Z axis.
  • the first vibrating part 11b and the second vibrating part 11c of the metal plate 10a bend along the negative direction of the Z axis, and the first vibrating part 11b and the second vibrating part 11c of the metal plate 10a
  • the mover 400 can be driven to slide relative to the base 200 along the negative direction of the Z axis.
  • the actuator 100a in this embodiment can also be used as a part of the driving motor of the camera module, that is, the camera module includes the actuator 100a.
  • the driving motor is used to drive the lens of the camera module to move along the optical axis, so that the camera module can realize focusing.
  • the camera module can also be applied to an electronic device, so that the electronic device has a camera function, that is, the electronic device includes a camera module.
  • the electronic device can be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a camera, a personal computer, a notebook computer, a vehicle-mounted device, a wearable device, etc. , augmented reality (augmented reality, AR) glasses, AR helmet, virtual reality (virtual reality, VR) glasses or VR helmet.
  • the actuator 100a of this embodiment can also be used as a part of other modules, for example, a part of a motor module.

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Abstract

本申请提供一种致动器、驱动装置、摄像模组以及电子设备。致动器包括金属板、第一压电陶瓷以及第二压电陶瓷。金属板包括振动部以及连接部。振动部连接周侧面。第一压电陶瓷固定顶面。第二压电陶瓷固定底面。第一压电陶瓷的极化方向、第二压电陶瓷的极化方向与第二压电陶瓷、金属板以及第一压电陶瓷的堆叠方向相同。第一压电陶瓷的顶面和第二压电陶瓷的底面用于电连接电源的第一电极端。第一压电陶瓷的底面和第二压电陶瓷的顶面用于电连接电源的第二电极端。本申请的致动器的激励结构较为简单。

Description

致动器、驱动装置、摄像模组以及电子设备
本申请要求于2021年12月31日提交中国专利局、申请号为2021116789737、申请名称为“致动器、驱动装置、摄像模组以及电子设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及致动器技术领域，尤其涉及一种致动器、驱动装置、摄像模组以及电子设备。
背景技术
近年来，由于致动器具有体积小且精度高等优点，使得致动器备受各大研究所和厂商的研究。然而，由于传统的致动器的结构较为复杂，且压电陶瓷的激励方式较为复杂，使得传统的致动器很难应用到产品中。而本申请提出了一种结构简单且压电陶瓷的激励方式较为简单的致动器。
发明内容
本申请提供一种结构简单，且压电陶瓷的激励方式较为简单的致动器、驱动装置、摄像模组以及电子设备。
第一方面，本申请实施例提供一种致动器。致动器包括金属板、第一压电陶瓷以及第二压电陶瓷。所述金属板包括振动部以及连接部，所述连接部包括周侧面以及背向设置的顶面和底面，所述周侧面连接在所述顶面和所述底面之间，所述振动部连接所述周侧面，所述第一压电陶瓷固定所述连接部的顶面，所述第二压电陶瓷固定所述连接部的底面。
所述第一压电陶瓷的极化方向、所述第二压电陶瓷的极化方向与所述第二压电陶瓷、所述金属板以及所述第一压电陶瓷的堆叠方向相同，所述第一压电陶瓷的顶面和所述第二压电陶瓷的底面用于电连接电源的第一电极端，所述第一压电陶瓷的底面和所述第二压电陶瓷的顶面用于电连接所述电源的第二电极端，所述第一电极端与所述第二电极端中的任意一者为正极端，另一者为负极端。
可以理解的是，本实施方式通过将所述第一压电陶瓷的极化方向、所述第二压电陶瓷的极化方向与所述第二压电陶瓷、所述金属板以及所述第一压电陶瓷的堆叠方向设置成相同，且将第一压电陶瓷的顶面和所述第二压电陶瓷的底面用于电连接电源的第一电极端，所述第一压电陶瓷的底面和所述第二压电陶瓷的顶面用于电连接所述电源的第二电极端，从而使得第一压电陶瓷的伸缩方向和第二压电陶瓷的伸缩方向相同，进而利用第一压电陶瓷和第二压电陶瓷以使金属板的振动部振动。本实施方式的致动器的压电陶瓷的激励方式较为简单，工艺上容易实现。
另外，本实施方式的致动器的部件数量较少，结构简单，工艺上容易实现，有利于小型化设置。
在一种可能实现的方式中，当所述致动器处于第一工作状态时，所述第一压电陶瓷和所述第二压电陶瓷接收第一种信号，所述振动部沿第一方向弯曲。当所述致动器处于第二工作状态时，所述第一压电陶瓷和所述第二压电陶瓷接收第二种信号，所述振动部沿第二方向弯曲，所述第二种信号与所述第一种信号不同，所述第一方向与所述第二方向不同。
可以理解的是，本实施方式的致动器可以在两个不同方向振动。致动器可以作为摄像模组的驱动马达的核心部件，致动器在摄像模组领域内具有较佳的应用前景。
在一种可能实现的方式中，所述第一种信号与所述第二种信号均为方波信号。
在一种可能实现的方式中，所述致动器包括第一电连接线、第二电连接线以及第三电连接线，所述第一电连接线的第一端电连接于所述第一压电陶瓷的顶面，所述第一电连接线的第二端电连接于所述第二压电陶瓷的底面，所述第二电连接线的第一端电连接于所述第一电连接线，所述第二电连接线的第二端电连接于所述电源的第一电极端，所述第三电连接线的第一端电连接于所述金属板，所述第三电连接线的第二端电连接于所述电源的第二电极端。
可以理解的是，本实施方式的致动器的电连接方式较为简单，工艺上容易实现。
在一种可能实现的方式中，所述致动器包括第一电连接线、第二电连接线、第三电连接线以及第四电连接线。所述第一电连接线的第一端电连接于所述第一压电陶瓷的顶面，所述第一电连接线的第二端电连接于所述第二压电陶瓷的底面，所述第二电连接线的第一端电连接于所述第一电连接线，所述第二电连接线的第二端电连接于所述电源的第一电极端。所述第三电连接线的第一端电连接于所述第一压电陶瓷的底面，所述第三电连接线的第二端电连接于所述第二压电陶瓷的顶面，所述第四电连接线的第一端电连接于第三电连接线，所述第四电连接线的第二端电连接于所述电源的第二电极端。
可以理解的是，本实施方式的致动器的电连接方式较为简单，工艺上容易实现。
在一种可能实现的方式中，所述振动部包括依次连接的第一面、第二面和第三面，所述第一面与所述第三面均连接于所述连接部的周侧面。所述第一面与所述第二面之间的角度为第一角度，所述第三面与所述第二面之间的角度为第二角度，所述第一面与所述周侧面之间的角度为第三角度，所述第三面与所述周侧面之间的角度为第四角度，所述第一角度、所述第二角度、所述第三角度与所述第四角度均为钝角。
可以理解的是，本实施方式的致动器的振动部大致呈梯形。此时，相较于其他形状的振动部，本实施方式的振动部较容易振动，且有利于增大振幅。
在一种可能实现的方式中，所述第一角度等于所述第三角度，所述第二角度等于所述第四角度。
在一种可能实现的方式中，所述金属板设有第一通孔，所述第一通孔的一部分或者全部位于所述振动部。
可以理解的是，通过在振动部设置至少部分第一通孔，可以提高振动部的弹性，从而较大程度地增大振动部的振幅。
在一种可能实现的方式中，所述金属板包括第一固定部以及第二固定部，所述周侧面包括背向设置的第一侧面和第二侧面,所述振动部连接所述第一侧面，所述第一固定部以及所述第二固定部间隔地连接于所述第二侧面。所述致动器包括固定板，所述第一固定部与所述第二固定部均固定于所述固定板。
在一种可能实现的方式中，所述振动部包括间隔设置的第一振动部和第二振动部，所述第一振动部和所述第二振动部用于夹住所述致动器外部的动子。
在一种可能实现的方式中，所述第一振动部包括第一驱动臂和第一驱动块，所述第一驱动臂连接于所述连接部的周侧面与所述第一驱动块之间，第二振动部包括第二驱动臂和第二驱动块，所述第二驱动臂连接于所述连接部的周侧面与所述第二驱动块之间，所述第一驱动块与所述第二驱动块用于夹住所述致动器外部的动子。所述第一驱动块与所述第二驱动块靠近设置，所述第一驱动臂连接于所述连接部的端部与所述第二驱动臂连接于所述连接部的端部张开设置。
在一种可能实现的方式中，所述第一驱动块具有朝向所述第二驱动块的第一夹持面，所述第一夹持面为弧面。
在一种可能实现的方式中，所述第二驱动块具有朝向所述第一驱动块的第二夹持面，所述第二夹持面为弧面。
在一种可能实现的方式中，所述金属板包括第一固定部以及第二固定部。所述周侧面包括背向设置的第一侧面和第二侧面，以及背向设置的第三侧面和第四侧面，所述第三侧面和所述第四侧面连接在所述第一侧面和所述第二侧面之间，所述第一振动部与所述第二振动部连接所述第一侧面，所述第一固定部连接所述第三侧面，所述第二固定部连接所述第四侧面；
所述致动器包括固定座，所述第一固定部与所述第二固定部固定于所述固定座。
在一种可能实现的方式中，固定板设有间隔设置的第一限位孔和第二限位孔。第一固定部插接于第一限位孔内。第二固定部插接于第二限位孔内。可以理解的是，本实施方式的金属板与固定板之间的连接方式较为简单。
在一种可能实现的方式中，所述金属板的材质为不锈钢或者铜。
在一种可能实现的方式中，当所述致动器处于未工作状态时，所述振动部未发生弯曲，所述第三种信号与所述第一种信号、所述第二种信号不同。
在一种可能实现的方式中，所述第三种信号的电压为零。
第二方面，本申请实施例提供一种驱动装置。驱动装置包括基座、动子以及如上所述的致动器。所述动子滑动连接于所述基座，所述致动器固定所述基座，所述致动器的振动部连接于所述动子。
在一种可能实现的方式中，所述动子设有活动槽。所述驱动装置包括弹片，所述弹片固定所述动子，且横跨所述活动槽。所述致动器的振动部连接于所述弹片。所述致动器的振动部对所述弹片施加作用力，所述弹片的一部分向所述活动槽内变形。
在一种可能实现的方式中，所述动子设有间隔设置的第一滚动槽和第二滚动槽，所述基座还设有间隔设置的第三滚动槽和第四滚动槽，所述第一滚动槽和所述第三滚动槽围出第一滚动空间，所述第二滚动槽和所述第四滚动槽围出第二滚动空间.所述驱动装置包括第一滚珠以及第二滚珠，所述第一滚珠滚动连接于所述第一滚动空间内，所述第二滚珠滚动连接于第二滚动空间内。
可以理解的是，通过在动子与基座之间设置第一滚珠和第二滚珠，可以降低动子受到的摩擦力。
第三方面，本申请实施例提供一种摄像模组。摄像模组包括如上所述的驱动装置。
第四方面，本申请实施例提供一种摄像模组。摄像模组包括如上所述的致动器。
第五方面，本申请实施例提供一种电子设备。电子设备包括如上所述的摄像模组。
附图说明
为了说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图进行说明。
图1是本申请实施例提供的致动器的一种实施方式的结构示意图；
图2是图1所示的致动器的分解示意图；
图3是图2所示的金属板在另一个角度下的结构示意图；
图4是图2所示的金属板在再一种角度下的结构示意图；
图5是图1所示的致动器的部分结构示意图；
图6是图1所示的致动器在A-A线处的剖面示意图；
图7是图1所示的致动器的电连接的一种实施方式的示意图；
图8是图1所示的致动器处于第一工作状态下的仿真示意图；
图9是图7所示的致动器的电连接方式的第一种电信号、第一电势差以及第二电势差在一种实施方式的示意图；
图10是图1所示的致动器处于第二工作状态下的仿真示意图；
图11是图7所示的致动器的电连接方式的第二种电信号、第三电势差以及第四电势差在一种实施方式的示意图；
图12是图7所示的致动器的电连接方式的第三种电信号、第五电势差以及第六电势差在一种实施方式的示意图；
图13是图1所示的致动器的电连接的另一种实施方式的示意图；
图14是本申请实施例提供的驱动装置的一种实施方式的结构示意图；
图15是图14所示的驱动装置的部分分解示意图；
图16是图15所示的动子在不同角度下的结构示意图；
图17是图14所示的驱动装置的部分结构示意图；
图18是图15所示的基座在不同角度下的结构示意图；
图19是图14所示的驱动装置在B-B线的剖面示意图；
图20是本申请实施例提供的致动器的另一种实施方式的结构示意图；
图21是图20所示的致动器的分解示意图；
图22是图21所示的致动器的金属板在另一角度下的结构示意图；
图23是图21所示的致动器的金属板在再一种角度下的结构示意图；
图24是图20所示的致动器的部分结构示意图；
图25是图20所示的致动器处于第一工作状态下的仿真示意图；
图26是图25所示的致动器在另一个角度下的仿真示意图；
图27是图20所示的致动器处于第二工作状态下的仿真示意图；
图28是图27所示的致动器在另一个角度下的仿真示意图。
具体实施方式
下面结合本申请实施例中的附图对本申请实施例进行描述。
在本申请实施例的描述中，需要说明的是，除非另有明确的规定和限定，术语“连接”应做广义理解，例如，“连接”可以是可拆卸地连接，也可以是不可拆卸地连接；可以是直接连接，也可以通过中间媒介间接连接。其中，“固定连接”是指彼此连接且连接后的相对位置关系不变。本申请实施例中所提到的方位用语，例如，“顶”、“底”等，仅是参考附图的方向，因此，使用的方位用语是为了更好、更清楚地说明及理解本申请实施例，而不是指示或暗指所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
请参阅图1和图2，图1是本申请实施例提供的致动器100a的一种实施方式的结构示意图。图2是图1所示的致动器100a的分解示意图。致动器100a包括金属板10a、第一压电陶瓷20a、第二压电陶瓷30a以及固定板40a。在本申请实施例中，以第二压电陶瓷30a、金属板10a以及第一压电陶瓷20a的依次堆叠的方向为Z轴的正方向。金属板10a的长度方向为Y轴方向。金属板10a的宽度方向为X轴方向。其中，本实施方式定义Z轴的正方向为第一方向。Z轴的负方向为第二方向。在其他实施方式中，致动器100a的坐标轴设置可以根据需要灵活设置。这里不做具体地限定。需要说明的是，第二压电陶瓷30a、金属板10a以及 第一压电陶瓷20a的堆叠的方向包括两种情况：一种是第二压电陶瓷30a、金属板10a以及第一压电陶瓷20a的依次堆叠的方向，也即Z轴的正方向。另一种是第一压电陶瓷20a、金属板10a以及第二压电陶瓷30a的依次堆叠的方向，也即Z轴的负方向。
在一种实施方式中，金属板10a的材质可以为不锈钢或者铜。
请参阅图3，并结合图2所示，图3是图2所示的金属板10a在另一个角度下的结构示意图。金属板10a包括振动部11a、连接部12a、第一固定部13a以及第二固定部14a。需要说明的是，图2和图3通过虚线示意性地区分振动部11a、连接部12a、第一固定部13a以及第二固定部14a。
此外，连接部12a包括周侧面120a以及背向设置的顶面121a和底面122a。周侧面120a连接于顶面121a和底面122a之间。在本实施方式中，周侧面120a包括背向设置的第一侧面123a和第二侧面124a。第一侧面123a和第二侧面124a连接在顶面121a和底面122a之间。在其他实施方式中，周侧面120a的形状不做具体的限定。
另外，振动部11a连接于连接部12a的第一侧面123a。第一固定部13a以及第二固定部14a间隔地连接于连接部12a的第二侧面124a。在其他实施方式中，第一固定部13a以及第二固定部14a也可以间隔地连接于周侧面120a的其他位置。
在一种实施方式中，金属板10a设有第一通孔114a。第一通孔114a的一部分位于金属板10a的振动部11a，一部分位于金属板10a的连接部12a。在其他实施方式中，第一通孔114a也可以全部位于金属板10a的振动部11a。在其他实施方式中，金属板10a也可以没有设置第一通孔114a。
请参阅图4，图4是图2所示的金属板10a在再一种角度下的结构示意图。金属板10a的振动部11a包括依次连接的第一面111a、第二面112a和第三面113a，也即第二面112a连接于第一面111a与第三面113a之间。振动部11a的第一面111a与第三面113a均连接于连接部12a的第一侧面123a。其中，第一面111a与第二面112a之间的角度为第一角度a。第一角度a为钝角。第三面113a与第二面112a之间的角度为第二角度b。第二角度b为钝角。
在一种实施方式中，第一面111a与连接部12a的第一侧面123a之间的角度为第三角度c。第三角度c为钝角。第三面113a与连接部12a的第一侧面123a之间的角度为第四角度d。第四角度d为钝角。
在一种实施方式中，第一角度a等于第三角度c。第二角度b等于第四角度d。
请参阅图5，并结合图2和图3所示，图5是图1所示的致动器100a的部分结构示意图。第一压电陶瓷20a固定于连接部12a的顶面121a。第二压电陶瓷30a固定于连接部12a的底面122a。此时，金属板10a的连接部12a位于第一压电陶瓷20a和第二压电陶瓷30a之间。
在一种实施方式中，第一压电陶瓷20a可以通过粘胶固定于连接部12a的顶面121a。示例性地，粘胶可以为环氧树脂胶。
在一种实施方式中，第二压电陶瓷30a可以通过粘胶固定于连接部12a的底面122a。示例性地，粘胶可以为环氧树脂胶。
在一种实施方式中，第一压电陶瓷20a的极化方向平行于第一压电陶瓷20a的厚度方向。第二压电陶瓷30a的极化方向平行于第二压电陶瓷30a的厚度方向。可以理解的是，当第一压电陶瓷20a和第二压电陶瓷30a均安装于金属板10a的连接部12a时，第二压电陶瓷30a的极化方向与第一压电陶瓷20a的极化方向相同。示例性地，第一压电陶瓷20a的极化方向与第二压电陶瓷30a的极化方向均平行于Z轴的正方向。需要说明的是，图5通过带有实线的箭头示意性地给出第一压电陶瓷20a的极化方向。图5通过带有虚线的箭头示意性地给出 第二压电陶瓷30a的极化方向方向。在其他实施方式中，第一压电陶瓷20a的极化方向与第二压电陶瓷30a的极化方向也可以均平行于Z轴的负方向。
在一种实施方式中，第一压电陶瓷20a在连接部12a的顶面121a投影与第二压电陶瓷30a在连接部12a的顶面121a的投影重合。
请再次参阅图2，固定板40a包括背向设置的第一板面41a和第二板面42a，以及连接在第一板面41a和第二板面42a之间的周侧面43a。此外，固定板40a设有间隔设置的第一限位孔44a和第二限位孔45a。其中，第一限位孔44a和第二限位孔45a均自固定板40a的第一板面41a贯穿至固定板40a的第二板面42a。第二限位孔45a还可以贯穿固定板40a的周侧面43a。在其他实施方式中，第二限位孔45a也可以不用贯穿固定板40a的周侧面43a。在其他实施方式中，固定板40a也可以不用设置间隔设置的第一限位孔44a和第二限位孔45a。
请参阅图6，并结合图2所示，图6是图1所示的致动器100a在A-A线处的剖面示意图。金属板10a的第一固定部13a插接于固定板40a的第一限位孔44a内。金属板10a的第二固定部14a插接于固定板40a的第二限位孔45a内。此时，金属板10a的第一固定部13a与第二固定部14a固定于固定板40a。在其他实施方式中，金属板10a的第一固定部13a与第二固定部14a与固定板40a之间的连接方式不做具体地限定。例如金属板10a的第一固定部13a、第二固定部14a可以通过扣合方式与固定板40a固定连接。
在一种实施方式中，金属板10a的第一固定部13a与第一限位孔44a的孔壁之间可以设置粘胶。粘胶可以使得金属板10a的第一固定部13a与固定板40a连接更加牢固。在其他实施方式中，金属板10a的第一固定部13a与第一限位孔44a的孔壁之间也可以通过点焊实现连接。
在一种实施方式中，金属板10a的第二固定部14a与第二限位孔45a的孔壁之间也可以设置粘胶。粘胶可以使得金属板10a的第二固定部14a与固定板40a连接更加牢固。在其他实施方式中，金属板10a的第二固定部14a与第二限位孔45a的孔壁之间也可以通过点焊实现连接。
上文结合相关附图具体介绍了一种致动器100a的实施方式。下文结合相关附图具体一种致动器100a的电连接方式。
请参阅图7，图7是图1所示的致动器100a的电连接的一种实施方式的示意图。致动器100a包括第一电连接线51a、第二电连接线52a以及第三电连接线53a。第一电连接线51a的第一端电连接于第一压电陶瓷20a的顶面21a。第一电连接线51a的第二端电连接于第二压电陶瓷30a的底面32a。第二电连接线52a的第一端电连接于第一电连接线51a。第二电连接线52a的第二端电连接于电源54a的正极端541a(也称为电源54a的第一电极端)。第三电连接线53a的第一端电连接于金属板10a。第三电连接线53a的第二端电连接于电源54a的负极端542a(也称为电源54a的第二电极端)。这样，电源54a、第二电连接线52a、第一电连接线51a、第一压电陶瓷20a、金属板10a、第二压电陶瓷30a以及第三电连接线53a形成电流回路。在其他实施方式中，第二电连接线52a的第二端可以电连接于电源54a的负极端542a。第三电连接线53a的第二端可以电连接于电源54a的正极端541a。
可以理解的是，当电源54a通过第一电连接线51a、第二电连接线52a和第三电连接线53a向第一压电陶瓷20a和第二压电陶瓷30a发送第一种电信号u1(t)时，第一压电陶瓷20a在第一种电信号u1(t)下形成第一电势差
Figure PCTCN2022141944-appb-000001
第二压电陶瓷30a在第一种电信号u1(t)下形成第二电势差
Figure PCTCN2022141944-appb-000002
这样，第一压电陶瓷20a在第一电势差
Figure PCTCN2022141944-appb-000003
下，产生第一伸缩。第二压电陶瓷30a在第二电势差
Figure PCTCN2022141944-appb-000004
下，产生第二伸缩。其中，第一压电陶瓷20a的第一伸缩的 方向与第二压电陶瓷30a的第二伸缩的方向可以相同。
请参阅图8，图8是图1所示的致动器100a处于第一工作状态下的仿真示意图。金属板10a的振动部11a在第一压电陶瓷20a的第一伸缩和第二压电陶瓷30a的第二伸缩的作用下沿第一方向弯曲。致动器100a处于第一工作状态。示例性地，第一方向为Z轴的正方向。
请参阅图9，图9是图7所示的致动器100a的电连接方式的第一种电信号u1(t)、第一电势差
Figure PCTCN2022141944-appb-000005
以及第二电势差
Figure PCTCN2022141944-appb-000006
在一种实施方式的示意图。第一种信号u1(t)为脉冲宽度调制(pulse width modulation，PWM)信号。第一种信号u1(t)为方波信号。第一种信号u1(t)的电压最大值可以为50V。第一种信号u1(t)的电压最小值可以为0V。第一种信号u1(t)的电压最大值的时间长度与第一种信号u1(t)的电压最小值的时间长度的比值可以为70％。另外，第一电势差
Figure PCTCN2022141944-appb-000007
的电压最大值可以为50V。第一电势差
Figure PCTCN2022141944-appb-000008
的电压最小值可以为0V。第二电势差
Figure PCTCN2022141944-appb-000009
的电压最小值可以为-50V。第二电势差
Figure PCTCN2022141944-appb-000010
的电压最大值可以为0V。
请再次参阅图7，当电源54a通过第一电连接线51a、第二电连接线52a和第三电连接线53a向第一压电陶瓷20a和第二压电陶瓷30a发送第二种电信号u2(t)时，第一压电陶瓷20a在第二种电信号u2(t)下形成第三电势差
Figure PCTCN2022141944-appb-000011
第二压电陶瓷30a在第二种电信号u2(t)下形成第四电势差
Figure PCTCN2022141944-appb-000012
这样，第一压电陶瓷20a在第三电势差
Figure PCTCN2022141944-appb-000013
下，产生第三伸缩。第二压电陶瓷30a在第四电势差
Figure PCTCN2022141944-appb-000014
下，产生第四伸缩。其中，第四伸缩的方向与第三伸缩的方向相同。第三伸缩的方向与第一伸缩的方向可以不同。
请参阅图10，图10是图1所示的致动器100a处于第二工作状态下的仿真示意图。金属板10a的振动部11a在第一压电陶瓷20a的第三伸缩和第二压电陶瓷30a的第四伸缩的作用下沿第二方向弯曲。致动器100a处于第二工作状态。示例性地，第二方向为Z轴的负方向。
请参阅图11，图11是图7所示的致动器100a的电连接方式的第二种电信号u2(t)、第三电势差
Figure PCTCN2022141944-appb-000015
以及第四电势差
Figure PCTCN2022141944-appb-000016
在一种实施方式的示意图。第二种信号u2(t)为PWM信号。第二种信号u2(t)为方波信号。第二种信号u2(t)的电压最小值可以为-50V。第二种信号u2(t)的电压最大值可以为0V。第二种信号u2(t)的电压最小值的时间长度与第一种信号u1(t)的电压最大值的时间长度的比值可以为70％。另外，第三电势差
Figure PCTCN2022141944-appb-000017
的电压最小值可以为-50V。第三电势差
Figure PCTCN2022141944-appb-000018
的电压最大值可以为0V。第四电势差
Figure PCTCN2022141944-appb-000019
的电压最大值可以为50V。第四电势差
Figure PCTCN2022141944-appb-000020
的电压最小值可以为0V。
请再次参阅图7，当电源54a通过第一电连接线51a、第二电连接线52a和第三电连接线53a向第一压电陶瓷20a和第二压电陶瓷30a发送第三种电信号u3(t)时，第一压电陶瓷20a在第三种电信号u3(t)下形成第五电势差
Figure PCTCN2022141944-appb-000021
第二压电陶瓷30a在第三种电信号u3(t)下形成第六电势差
Figure PCTCN2022141944-appb-000022
这样，第一压电陶瓷20a在第五电势差
Figure PCTCN2022141944-appb-000023
下，不会产生伸缩。第二压电陶瓷30a在第六电势差
Figure PCTCN2022141944-appb-000024
下，不会产生伸缩。金属板10a的振动部11a没有发生弯曲。致动器100a处于未工作状态。
请参阅图12，图12是图7所示的致动器100a的电连接方式的第三种电信号u3(t)、第五电势差
Figure PCTCN2022141944-appb-000025
以及第六电势差
Figure PCTCN2022141944-appb-000026
在一种实施方式的示意图。第三种电信号u3(t)等于0。此时，第五电势差
Figure PCTCN2022141944-appb-000027
和第六电势差
Figure PCTCN2022141944-appb-000028
均等于0。
请参阅图13，图13是图1所示的致动器100a的电连接的另一种实施方式的示意图。致动器100a包括第一电连接线51b、第二电连接线52b、第三电连接线53b以及第四电连接线54b。第一电连接线51b的第一端电连接于第一压电陶瓷20a的顶面21a。第一电连接线51b的第二端电连接于第二压电陶瓷30a的底面32a。第二电连接线52b的第一端电连接于第一电连接线51b。第二电连接线52b的第二端电连接于电源54a的正极端541a(也称为电源54a 的第一电极端)。
另外，第三电连接线53b的第一端电连接于第一压电陶瓷20a的底面22a。其中，第一压电陶瓷20a的底面22a和第一压电陶瓷20a的顶面21a为背向设置的两个表面。第三电连接线53b的第二端电连接于第二压电陶瓷30a的顶面31a。其中，第二压电陶瓷30a的顶面31a与第二压电陶瓷30a的底面32a为背向设置的两个表面。第四电连接线54b的第一端电连接于第三电连接线53b。第四电连接线54b的第二端电连接于电源54a的负极端542a(也称为电源54a的第二电极端)。这样，电源54a、第二电连接线52b、第一电连接线51b、第一压电陶瓷20a、第三电连接线53b和第四电连接线54b可以形成第一电流回路。电源54a、第二电连接线52b、第一电连接线51b、第二压电陶瓷30a、第三电连接线53b和第四电连接线54b可以形成第二电流回路。
在其他实施方式中，第二电连接线52b的第二端也可以电连接于电源54a的负极端542a。第四电连接线54b的第二端也可以电连接于电源54a的正极端541a。
可以理解的是，第一电流回路和第二电流回路可以共用同一个电源54a，此时，第一压电陶瓷20a和第二压电陶瓷30a可以在同一时刻接收同一种电信号。
可以理解的是，当电源54a传输第一种电信号时，第一种电信号既可以经第一电连接线51b、第二电连接线52b、第三电连接线53b以及第四电连接线54b作用在第一压电陶瓷20a，又可以经第一电连接线51b、第二电连接线52b、第三电连接线53b以及第四电连接线54b作用在第二压电陶瓷30a。第一压电陶瓷20a在第一种电信号下形成第一电势差，第二压电陶瓷30a在第一种电信号下形成第二电势差。这样，第一压电陶瓷20a在第一电势差下，产生第一伸缩。第二压电陶瓷30a在第二电势差下，产生第二伸缩。其中，第一伸缩的方向与第二伸缩的方向相同。此时，金属板10a的振动部11a在第一压电陶瓷20a的第一伸缩和第二压电陶瓷30a的第二伸缩的作用下沿第一方向弯曲。致动器100a处于第一工作状态。示例性地，第一方向为Z轴的正方向。
可以理解的是，本实施方式的电源54a传输的第一种电信号可以参阅上述实施方式的电源54a传输的第一种电信号u1(t)。具体地这里不再赘述。
另外，当电源54a传输第二种电信号时，第二种电信号既可以经第一电连接线51b、第二电连接线52b、第三电连接线53b以及第四电连接线54b作用在第一压电陶瓷20a，又可以经第一电连接线51b、第二电连接线52b、第三电连接线53b以及第四电连接线54b作用在第二压电陶瓷30a。第一压电陶瓷20a在第二种电信号下形成第三电势差，第二压电陶瓷30a在第二种电信号下形成第四电势差。这样，第一压电陶瓷20a在第三电势差下，产生第三伸缩。第二压电陶瓷30a在第四电势差下，产生第四伸缩。其中，第四伸缩的方向与第三伸缩的方向可以相同。第三伸缩的方向与第一伸缩的方向可以不同。此时，金属板10a的振动部11a在第一压电陶瓷20a的第三伸缩和第二压电陶瓷30a的第四伸缩的作用下沿第二方向弯曲。致动器100a处于第二工作状态。示例性地，第二方向为Z轴的负方向。
可以理解的是，本实施方式的电源54a传输的第二种电信号u2(t)可以参阅上述实施方式的电源54a传输的第二种电信号。具体地这里不再赘述。
另外，当电源54a传输第三种电信号u3(t)时，第一压电陶瓷20a在第三种电信号u3(t)下形成第五电势差
Figure PCTCN2022141944-appb-000029
第二压电陶瓷30a在第三种电信号u3(t)下形成第六电势差
Figure PCTCN2022141944-appb-000030
这样，第一压电陶瓷20a在第五电势差
Figure PCTCN2022141944-appb-000031
下，不会产生伸缩。第二压电陶瓷30a在第六电势差
Figure PCTCN2022141944-appb-000032
下，不会产生伸缩。金属板10a的振动部11a没有发生弯曲。致动器100a处于未工作状态。
可以理解的是，本实施方式的第三种电信号、第五电势差以及第六电势差的设置方式可以参阅上文的第三种电信号u3(t)、第五电势差
Figure PCTCN2022141944-appb-000033
以及第六电势差
Figure PCTCN2022141944-appb-000034
的设置方式。这里不再赘述。
请参阅图14及图15，图14是本申请实施例提供的驱动装置1的一种实施方式的结构示意图。图15是图14所示的驱动装置1的部分分解示意图。驱动装置1包括致动器100a、基座200、弹片300、动子400、第一滚珠501以及第二滚珠502。
请参阅图16，图16是图15所示的动子400在不同角度下的结构示意图。动子400包括背向设置的第一表面401和第二表面402。动子400设有固定柱403。固定柱403凸设于第一表面401。需要说明的是，固定柱403的数量不仅限于图16所示意的四个。具体地固定柱403的数量不做限定。
在一种实施方式中，动子400设有活动槽404。活动槽404的开口位于第一表面401。当固定柱403的数量为多个时，多个固定柱403可以围绕活动槽404设置。
在一种实施方式中，动子400设有间隔设置的第一滚动槽405和第二滚动槽406。第一滚动槽405和第二滚动槽406的开口均位于第二表面402。
请参阅图17，图17是图14所示的驱动装置1的部分结构示意图。弹片300设有固定孔301。固定孔301的数量可以与动子400的固定柱403的数量相同。
弹片300固定动子400的第一表面401，弹片300横跨活动槽404。弹片300的一部分与动子400的活动槽404相对设置。在一种实施方式中，动子400的固定柱403穿过弹片300的固定孔301。动子400的固定柱403可以与弹片300的固定孔301的孔壁过盈配合。在一种实施方式中，动子400的固定柱403穿过弹片300的固定孔301。通过在动子400的固定柱403与弹片300的固定孔301之间设置粘胶，以使弹片300与动子400的连接牢固度更佳。
请参阅图18，图18是图15所示的基座200在不同角度下的结构示意图。基座200围出安装空间201。基座200具有固定架202。固定架202位于安装空间201内。
另外，基座200还设有间隔设置的第三滚动槽203和第四滚动槽204。第三滚动槽203和第四滚动槽204均位于安装空间201内。
请参阅图19，并结合图18所示，图19是图14所示的驱动装置1在B-B线的剖面示意图。动子400滑动连接于基座200，且位于基座200的安装空间201内。其中，动子400的第一滚动槽405和基座200的第三滚动槽203围出第一滚动空间205。动子400的第二滚动槽406和基座200的第四滚动槽204围出第二滚动空间206。
另外，第一滚珠501设置于第一滚动空间205内。第二滚珠502设置于第二滚动空间206内。可以理解的是，当动子400相对基座200滑动时，第一滚珠501可以在第一滚动空间205内滚动，第二滚珠502可以在第二滚动空间206内滚动。通过设置第一滚珠501与第二滚珠502，可以降低动子400受到的摩擦力。
在其他实施方式中，可以通过在动子400与基座200之间设置滑动机构(例如滑轨和滑杆的配合结构)，以使动子400相对基座200的滑动过程中更佳稳定。
请再次参阅图14，致动器100a固定基座200。示例性地，致动器100a的固定板40a可以通过粘胶等方式固定在基座200的固定架202。
另外，致动器100a的金属板10a的振动部11a与弹片300接触。金属板10a的振动部11a对弹片300施加作用力。这样，金属板10a的振动部11a可以挤压弹片300，以使弹片300的一部分向活动槽404内变形。可以理解的是，动子400的活动槽404可以为弹片300提供变形空间。示例性地，致动器100a装配在基座200的过程中，先使金属板10a的振动部 11a预先对弹片300施加作用力。再将致动器100a的固定板40a固定于基座200的固定架202。
可以理解的是，请一并参阅图14和图8，当致动器100a处于第一工作状态时，金属板10a的振动部11a沿Z轴的正方向弯曲，金属板10a的振动部11a可以通过弹片300带动动子400沿Z轴的正方向相对基座200滑动。请一并参阅图14和图10，当致动器100a处于第二工作状态时，金属板10a的振动部11a沿Z轴的负方向弯曲，金属板10a的振动部11a可以通过弹片300带动动子400沿Z轴的负方向相对基座200滑动。
在本申请实施例中，驱动装置1可以应用于摄像模组中，也即摄像模组包括驱动装置1。驱动装置1可以作为摄像模组的驱动马达。其中，驱动马达用于驱动镜头沿光轴方向移动，以使摄像模组实现调焦。另外，摄像模组可以应用于电子设备中，以使电子设备具有摄像功能,也即电子设备包括摄像模组。其中，电子设备可以为手机、平板电脑(tablet personal computer)、膝上型电脑(laptop computer)、个人数码助理(personal digital assistant，PDA)、照相机、个人计算机、笔记本电脑、车载设备、可穿戴设备、增强现实(augmented reality，AR)眼镜、AR头盔、虚拟现实(virtual reality，VR)眼镜或者VR头盔。
在其他实施方式中，驱动装置1也可以应用于其他的模组中，例如电机模组，也即电机模组包括驱动装置1。
在其他实施方式中，致动器100a也可以直接应用于摄像模组，也即摄像模组包括如上所述的致动器100a。或者也可以直接应用于其他的模组中，例如电机模组。
上文结合相关附图具体介绍了一种致动器100a和驱动装置1的结构。下文将结合相关附图具体再介绍一种致动器100a的结构。
第二种实施方式，与第一种实施方式相同的内容不再赘述：请参阅图20及图21，图20是本申请实施例提供的致动器100a的另一种实施方式的结构示意图。图21是图20所示的致动器100a的分解示意图。致动器100a包括金属板10a、第一压电陶瓷20a、第二压电陶瓷30a以及固定座40b。在一种实施方式中，金属板10a的材质为不锈钢或铜。
请参阅图22，并结合图21所示，图22是图21所示的致动器100a的金属板10a在另一角度下的结构示意图。金属板10a包括振动部11a、连接部12a、第一固定部13a以及第二固定部13b。在本实施方式中，振动部11a包括间隔设置的第一振动部11b与第二振动部11c。其中，图21和图22均通过虚线示意性地区分第一振动部11b、第二振动部11c、连接部12a、第一固定部13a以及第二固定部13b。
请再次参阅图22，并结合图21所示，连接部12a包括周侧面120a以及背向设置的顶面121a和底面122a。周侧面120a连接于顶面121a和底面122a之间。在本实施方式中，周侧面120a包括背向设置的第一侧面123a和第二侧面124a，以及背向设置的第三侧面125a和第四侧面126a。第一侧面123a和第二侧面124a连接在顶面121a和底面122a之间。第三侧面125a和第四侧面126a连接在顶面121a和底面122a之间。第三侧面125a和第四侧面126a还连接在第一侧面123a与第二侧面124a之间。在其他实施方式中，周侧面120a的形状不做具体的限定。
另外，第一振动部11b和第二振动部11c间隔地连接于连接部12a的第一侧面123a。第一振动部11b与第二振动部11c之间形成空间。第一振动部11b与第二振动部11c相对设置。第一固定部13a连接于连接部12a的第三侧面125a。第二固定部13b连接于连接部12a的第四侧面126a。在其他实施方式中，第一固定部13a与第二固定部13b也可以均固定连接于第二侧面124a。或者，第一固定部13a与第二固定部13b中的任意一个固定于第三侧面125a或者第四侧面126a，另一个固定连接于第二侧面124a。
请参阅图23，图23是图21所示的致动器100a的金属板10a在再一种角度下的结构示意图。第一振动部11b包括第一驱动臂111b和第一驱动块112b。第一驱动臂111b的第一端连接于连接部12a的第一侧面123a。第一驱动臂111b的第二端连接第一驱动块112b。
第二振动部11c包括第二驱动臂111c和第二驱动块112c。第二驱动臂111c的第一端连接于连接部12a的第一侧面123a。第二驱动臂111c的第二端连接第二驱动块112c。
在一种实施方式中，第一驱动臂111b的第一端与第二驱动臂111c的第一端彼此远离设置,也即张开设置。第一驱动臂111b的第二端与第二驱动臂111c的第二端彼此靠近设置，也即靠拢设置。
在一种实施方式中，第一驱动块112b具有朝向第二驱动块112c的第一夹持面113b。第一夹持面113b为弧面。
在一种实施方式中，第二驱动块112c具有朝向第一驱动块112b的第二夹持面113c。第二夹持面113c与第一夹持面113b相对设置。第二夹持面113c为弧面。
请参阅图24，图24是图20所示的致动器100a的部分结构示意图。第一压电陶瓷20a固定于连接部12a的顶面121a。第二压电陶瓷30a固定于连接部12a的底面122a。可以理解的是，本实施方式的第一压电陶瓷20a与第二压电陶瓷30a的设置方式可以参阅第一种实施方式的第一压电陶瓷20a与第二压电陶瓷30a的设置方式。具体地这里不再赘述。此外，本实施方式的第一压电陶瓷20a、第二压电陶瓷30a与电源的电连接方式可以参阅第一种实施方式的第一压电陶瓷20a、第二压电陶瓷30a与电源的电连接方式。具体地这里不再赘述。
请再次参阅图21，固定座40b可以包括底板41b以及挡墙42b。挡墙42b连接于底板41b的部分周缘。挡墙42b与底板41b围出容纳空间43b。需要说明的是，图21通过虚线示意性地区分底板41b和挡墙42b。
此外，挡墙42b设有间隔且相对设置的第一侧孔421b和第二侧孔422b。第一侧孔421b和第二侧孔422b连通容纳空间43b。
请参阅图20，并结合图21所示，金属板10a、第一压电陶瓷20a和第二压电陶瓷30a设置于容纳空间43b内。金属板10a的第一固定部13a固定固定座40b的挡墙42b，且位于第一侧孔421b。金属板10a的第二固定部13b固定固定座40b的挡墙42b，且位于第二侧孔422b。示例性地，金属板10a的第一固定部13a可以通过粘胶固定于第一侧孔421b的孔壁。金属板10a的第二固定部13b可以通过粘胶固定于第二侧孔422b的孔壁。在其他实施方式中，金属板10a的第一固定部13a也可以通过点焊方式固定于第一侧孔421b的孔壁。金属板10a的第二固定部13b也可以通过点焊方式固定于第二侧孔422b的孔壁。
在本实施方式中，当第一压电陶瓷20a接收第一种电信号时，第一压电陶瓷20a在第一种电信号下形成第一电势差。当第二压电陶瓷30a接收第一种电信号时，第二压电陶瓷30a在第一种电信号下形成第二电势差。这样，第一压电陶瓷20a在第一电势差下，产生第一伸缩。第二压电陶瓷30a在第二电势差下，产生第二伸缩。其中，第一伸缩的方向与第二伸缩的方向可以相同。
请参阅图25及图26，图25是图20所示的致动器100a处于第一工作状态下的仿真示意图。图26是图25所示的致动器100a在另一个角度下的仿真示意图。金属板10a在第一压电陶瓷20a的第一伸缩和第二压电陶瓷30a的第二伸缩的作用下，第一振动部11b和第二振动部11c沿沿第一方向弯曲。致动器100a处于第一工作状态。示例性地，第一方向为Z轴的正方向。
可以理解的是，本实施方式的第一种电信号可以参阅上述实施方式的第一种电信号u1(t)。 具体地这里不再赘述。
另外，当第一压电陶瓷20a接收第二种电信号时，第一压电陶瓷20a在第二种电信号下形成第三电势差。当第二压电陶瓷30a接收第二种电信号时，第二压电陶瓷30a在第二种电信号下形成第四电势差。这样，第一压电陶瓷20a在第三电势差下，产生第三伸缩。第二压电陶瓷30a在第四电势差下，产生第四伸缩。其中，第四伸缩的方向与第三伸缩的方向可以相同。第三伸缩的方向与第一伸缩的方向可以不同。
请参阅图27及图28，图27是图20所示的致动器100a处于第二工作状态下的仿真示意图。图28是图27所示的致动器100a在另一个角度下的仿真示意图。金属板10a在第一压电陶瓷20a的第一伸缩和第二压电陶瓷30a的第二伸缩的作用下，第一振动部11b和第二振动部11c沿第二方向弯曲。致动器100a处于第二工作状态。示例性地，第二方向为Z轴的负方向。
可以理解的是，本实施方式的第二种电信号可以参阅上述实施方式的第二种电信号u2(t)。具体地这里不再赘述。
请再次参阅图24，当第一压电陶瓷20a和第二压电陶瓷30a接收第三种电信号时，第一压电陶瓷20a和第二压电陶瓷30a在第三种电信号下不会产生伸缩。金属板10a的振动部11a没有发生弯曲。致动器100a处于未工作状态。可以理解的是，本实施方式的第三种电信号可以参阅上述实施方式的第三种电信号u3(t)。具体地这里不再赘述。
可以理解的是，本实施方式的致动器100a也可以应用于驱动装置1。致动器100a的第一驱动块112b和第二驱动块112c可以直接用于夹住驱动装置1的动子400(请参阅图19)。例如，通过在动子400的第一侧面401(请参阅图19)凸设一个凸块(图未示)。此时，第一驱动块112b和第二驱动块112c可以直接夹住凸块。此时，金属板10a的第一振动部11b和第二振动部11c可以用于夹住驱动装置1的动子400。这样，当致动器100a处于第一工作状态时，金属板10a的第一振动部11b和第二振动部11c沿Z轴的正方向弯曲，金属板10a的第一振动部11b和第二振动部11c可以带动动子400沿Z轴的正方向相对基座200滑动。当致动器100a处于第二工作状态时，金属板10a的第一振动部11b和第二振动部11c沿Z轴的负方向弯曲，金属板10a的第一振动部11b和第二振动部11c可以带动动子400沿Z轴的负方向相对基座200滑动。
可以理解的是，本实施方式的致动器100a也可以作为摄像模组的驱动马达的一部分，也即摄像模组包括致动器100a。其中，驱动马达用于驱动摄像模组的镜头沿光轴方向移动，以使摄像模组实现调焦。另外，摄像模组也可以应用于电子设备中，以使电子设备具有摄像功能，也即电子设备包括摄像模组。其中，电子设备可以为手机、平板电脑(tablet personal computer)、膝上型电脑(laptop computer)、个人数码助理(personal digital assistant，PDA)、照相机、个人计算机、笔记本电脑、车载设备、可穿戴设备、增强现实(augmented reality，AR)眼镜、AR头盔、虚拟现实(virtual reality，VR)眼镜或者VR头盔。
在其他实施方式中，本实施方式的致动器100a也可以作为其他模组的一部分中，例如电机模组的一部分。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (20)

  1. 一种致动器(100a)，其特征在于，包括金属板(10a)、第一压电陶瓷(20a)以及第二压电陶瓷(30a)；
    所述金属板(10a)包括振动部(11a)以及连接部(12a)，所述连接部(12a)包括周侧面(120a)以及背向设置的顶面(121a)和底面(122a)，所述周侧面(120a)连接在所述顶面(121a)和所述底面(122a)之间，所述振动部(11a)连接所述周侧面(120a)，所述第一压电陶瓷(20a)固定所述连接部(12a)的顶面(121a)，所述第二压电陶瓷(30a)固定所述连接部(12a)的底面(122a)；
    所述第一压电陶瓷(20a)的极化方向、所述第二压电陶瓷(30a)的极化方向与所述第二压电陶瓷(30a)、所述金属板(10a)以及所述第一压电陶瓷(20a)的堆叠方向相同，所述第一压电陶瓷(20a)的顶面(21a)和所述第二压电陶瓷(30a)的底面(32a)用于电连接电源(54a)的第一电极端(541a)，所述第一压电陶瓷(20a)的底面(22a)和所述第二压电陶瓷(30a)的顶面(31a)用于电连接所述电源(54a)的第二电极端(542a)，所述第一电极端(541a)与所述第二电极端(542a)中的任意一者为正极端，另一者为负极端。
  2. 根据权利要求1所述的致动器(100a)，其特征在于，当所述致动器(100a)处于第一工作状态时，所述第一压电陶瓷(20a)和所述第二压电陶瓷(30a)接收第一种信号，所述振动部(11a)沿第一方向弯曲；
    当所述致动器(100a)处于第二工作状态时，所述第一压电陶瓷(20a)和所述第二压电陶瓷(30a)接收第二种信号，所述振动部(11a)沿第二方向弯曲，所述第二种信号与所述第一种信号不同，所述第一方向与所述第二方向不同。
  3. 根据权利要求2所述的致动器(100a)，其特征在于，所述第一种信号与所述第二种信号均为方波信号。
  4. 根据权利要求1至3中任一项所述的致动器(100a)，其特征在于，所述致动器(100a)包括第一电连接线(51a)、第二电连接线(52a)以及第三电连接线(53a)，所述第一电连接线(51a)的第一端电连接于所述第一压电陶瓷(20a)的顶面(21a)，所述第一电连接线(51a)的第二端电连接于所述第二压电陶瓷(30a)的底面(32a)，所述第二电连接线(52a)的第一端电连接于所述第一电连接线(51a)，所述第二电连接线(52a)的第二端电连接于所述电源(54a)的第一电极端(541a)，所述第三电连接线(53a)的第一端电连接于所述金属板(10a)，所述第三电连接线(53a)的第二端电连接于所述电源(54a)的第二电极端(542a)。
  5. 根据权利要求1至3中任一项所述的致动器(100a)，其特征在于，所述致动器(100a)包括第一电连接线(51b)、第二电连接线(52b)、第三电连接线(53b)以及第四电连接线(54b)；
    所述第一电连接线(51b)的第一端电连接于所述第一压电陶瓷(20a)的顶面(21a)，所述第一电连接线(51b)的第二端电连接于所述第二压电陶瓷(30a)的底面(32a)，所述第二电连接线(52b)的第一端电连接于所述第一电连接线(51b)，所述第二电连接线(52b)的第二端电连接于所述电源(54a)的第一电极端(541a)；
    所述第三电连接线(53b)的第一端电连接于所述第一压电陶瓷(20a)的底面(22a)，所述第三电连接线(53b)的第二端电连接于所述第二压电陶瓷(30a)的顶面(31a)，所述 第四电连接线(54b)的第一端电连接于第三电连接线(53b)，所述第四电连接线(54b)的第二端电连接于所述电源(54a)的第二电极端(542a)。
  6. 根据权利要求1至5中任一项所述的致动器(100a)，其特征在于，所述振动部(11a)包括依次连接的第一面(111a)、第二面(112a)和第三面(113a)，所述第一面(111a)与所述第三面(113a)均连接于所述连接部(12a)的周侧面(120a)；
    所述第一面(111a)与所述第二面(112a)之间的角度为第一角度(a)，所述第三面(113a)与所述第二面(112a)之间的角度为第二角度(b)，所述第一面(111a)与所述周侧面(120a)之间的角度为第三角度(c)，所述第三面(113a)与所述周侧面(120a)之间的角度为第四角度(d)，所述第一角度(a)、所述第二角度(b)、所述第三角度(c)与所述第四角度(d)均为钝角。
  7. 根据权利要求6所述的致动器(100a)，其特征在于，所述第一角度(a)等于所述第三角度(c)，所述第二角度(b)等于所述第四角度(d)。
  8. 根据权利要求1至7中任一项所述的致动器(100a)，其特征在于，所述金属板(10a)设有第一通孔(114a)，所述第一通孔(114a)的一部分或者全部位于所述振动部(11a)。
  9. 根据权利要求6至8中任一项所述的致动器(100a)，其特征在于，所述金属板(10a)包括第一固定部(13a)以及第二固定部(14a)，所述周侧面(120a)包括背向设置的第一侧面(123a)和第二侧面(124a),所述振动部(11a)连接所述第一侧面(123a)，所述第一固定部(13a)以及所述第二固定部(14a)间隔地连接于所述第二侧面(124a)；
    所述致动器(100a)包括固定板(40a)，所述第一固定部(13a)与所述第二固定部(14a)均固定于所述固定板(40a)。
  10. 根据权利要求1至5中任一项所述的致动器(100a)，其特征在于，所述振动部(10a)包括间隔设置的第一振动部(11b)和第二振动部(11c)，所述第一振动部(11b)和所述第二振动部(11c)用于夹住所述致动器(100a)外部的动子。
  11. 根据权利要求10所述的致动器(100a)，其特征在于，所述第一振动部(11b)包括第一驱动臂(111b)和第一驱动块(112b)，所述第一驱动臂(111b)连接于所述连接部(12a)的周侧面(120a)与所述第一驱动块(112b)之间，第二振动部(11c)包括第二驱动臂(111c)和第二驱动块(112c)，所述第二驱动臂(111c)连接于所述连接部(12a)的周侧面(120a)与所述第二驱动块(112c)之间，所述第一驱动块(112b)与所述第二驱动块(112c)用于夹住所述致动器(100a)外部的动子；
    所述第一驱动块(112b)与所述第二驱动块(112c)靠近设置，所述第一驱动臂(111b)连接于所述连接部(12a)的端部与所述第二驱动臂(111c)连接于所述连接部(12a)的端部张开设置。
  12. 根据权利要求11所述的致动器(100a)，其特征在于，所述第一驱动块(112b)具有朝向所述第二驱动块(112c)的第一夹持面(113b)，所述第一夹持面(113b)为弧面。
  13. 根据权利要求10至12中任一项所述的致动器(100a)，其特征在于，所述金属板(10b)包括第一固定部(13a)以及第二固定部(13b)；
    所述周侧面(120a)包括背向设置的第一侧面(123a)和第二侧面(124a)，以及背向设置的第三侧面(125a)和第四侧面(126a)，所述第三侧面(125a)和所述第四侧面(126a)连接在所述第一侧面(123a)和所述第二侧面(124a)之间，所述第一振动部(11b)与所述第二振动部(11c)连接所述第一侧面(123a)，所述第一固定部(13a)连接所述第三侧面(125a)，所述第二固定部(13b)连接所述第四侧面(126a)；
    所述致动器(100a)包括固定座(40b)，所述第一固定部(13a)与所述第二固定部(13b)固定于所述固定座(40b)。
  14. 根据权利要求1至13中任一项所述的致动器(100a)，其特征在于，所述金属板(10a)的材质为不锈钢或者铜。
  15. 根据权利要求1至14中任一项所述的致动器(100a)，其特征在于，当所述致动器(100a)处于未工作状态时，所述振动部(11a)未发生弯曲，所述第三种信号与所述第一种信号、所述第二种信号不同。
  16. 一种驱动装置(1)，其特征在于，包括基座(200)、动子(400)以及如权利要求1至15中任一项所述的致动器(100a)；
    所述动子(400)滑动连接于所述基座(200)，所述致动器(100a)固定所述基座(200)，所述致动器(100a)的振动部(11a)连接于所述动子(400)。
  17. 根据权利要求16所述的驱动装置(1)，其特征在于，所述动子(400)设有活动槽(404)，所述驱动装置(1)包括弹片(300)，所述弹片(300)固定所述动子(400)，且横跨所述活动槽(404)，所述致动器(100a)的振动部(11a)连接于所述弹片(300)，所述致动器(100a)的振动部(11a)对所述弹片(300)施加作用力，所述弹片(300)的一部分向所述活动槽(404)内变形。
  18. 根据权利要求16或17所述的驱动装置(1)，其特征在于，所述动子(400)设有间隔设置的第一滚动槽(405)和第二滚动槽(406)，所述基座(200)还设有间隔设置的第三滚动槽(203)和第四滚动槽(204)，所述第一滚动槽(405)和所述第三滚动槽(203)围出第一滚动空间(205)，所述第二滚动槽(406)和所述第四滚动槽(204)围出第二滚动空间(206)；
    所述驱动装置(1)包括第一滚珠(501)以及第二滚珠(502)，所述第一滚珠(501)滚动连接于所述第一滚动空间(205)内，所述第二滚珠(502)滚动连接于第二滚动空间(206)内。
  19. 一种摄像模组，其特征在于，包括如权利要求16至18中任一项所述的驱动装置(1)。
  20. 一种电子设备，其特征在于，包括如权利要求19所述的摄像模组。
PCT/CN2022/141944 2021-12-31 2022-12-26 致动器、驱动装置、摄像模组以及电子设备 WO2023125415A1 (zh)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07142781A (ja) * 1993-06-21 1995-06-02 Sumitomo Metal Ind Ltd 圧電バイモルフ素子
US20020149296A1 (en) * 1999-05-21 2002-10-17 Satoru Fujii Thin-film piezoelectric bimorph element, mechanical detector and inkjet head using the same, and methods of manufacturing the same
JP2007274790A (ja) * 2006-03-30 2007-10-18 Taiheiyo Cement Corp 駆動装置
CN104467524A (zh) * 2014-10-16 2015-03-25 南京航空航天大学 基于面内模态的板式直线压电电机的工作方式

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07142781A (ja) * 1993-06-21 1995-06-02 Sumitomo Metal Ind Ltd 圧電バイモルフ素子
US20020149296A1 (en) * 1999-05-21 2002-10-17 Satoru Fujii Thin-film piezoelectric bimorph element, mechanical detector and inkjet head using the same, and methods of manufacturing the same
JP2007274790A (ja) * 2006-03-30 2007-10-18 Taiheiyo Cement Corp 駆動装置
CN104467524A (zh) * 2014-10-16 2015-03-25 南京航空航天大学 基于面内模态的板式直线压电电机的工作方式

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