Patent Description:
Currently, electronic devices, such as mobile phones, handheld game consoles, handheld multimedia entertainment devices, or other electronic products usually adopt micro vibration motors to realize vibration feedback.

At present, mainstream motors are implemented in the following principle: when a current-carrying conductor passes through a magnetic field, it will be subject to a force whose direction is perpendicular to directions of a current and the magnetic field, and the magnitude of the force is proportional to the current, a wire length, and magnetic flux density. A motor includes magnetic steel, a mass block, and a coil. When an alternating current is input into the coil, the coil is subject to an alternating driving force, resulting in an alternating motion, which drives the mass block to vibrate for a vibration sound.

Since the motor includes the magnetic steel and the coil, and magnetic fields generated by the magnetic steel and the coil may interfere with devices around the motor.

<CIT> discloses a scanning mechanism for scanning a very smaller field of view. The scanning mechanism is adapted to oscillate in azimuth and elevation at predetermined frequencies and generally comprises a scanner <NUM>, a scanner support member <NUM> on which said scanner is mounted; an intermediate support member <NUM> at least partially transparent, opposed to said scanner face, first crossed pivot spring means <NUM> extending from said intermediate member <NUM> to said scanner support <NUM> for oscillation in the azimuth axis; a fixed member <NUM> opposed to said scanner back side; and second crossed pivot spring means extending between said fixed member 17and said intermediate member <NUM> for oscillation in the elevation axis.

<CIT> discloses an ultrasonic motor having a multilayer actuator in the form of a multilayer plate, having one or more friction elements or friction layers on its side surfaces and having an electrical exciter apparatus for the actuator. According to the invention, the multilayer plate has two intersecting, mirror-imaged asymmetrical generators for ultrasonic vibrations, to be precise in the form of layers of exciter electrodes and general electrodes which are alternately arranged with layers of piezoelectric ceramic, wherein a two-dimensional asymmetrical acoustic standing wave is generated in the multilayer actuator.

<CIT> discloses a linear vibrating motor, including shell, spring leaf, FPC, coil, vibration subassembly and the support that has accommodation space, coil and vibration inter -module are at a distance from setting up in shell accommodation space, the vibration subassembly includes oscillator, magnet and pole piece, is provided with the preformed hole that runs through the oscillator on the oscillator, and the magnet sets up on the pore wall of preformed hole, and the preformed hole is compressed by the magnet and forms the hole that shakes of running through the oscillator, is provided with the incision that runs through the pole piece on the pole piece, and the pole piece sets up in the oscillator below and contacts with magnet and oscillator simultaneously, FPC sets up on the support, and the coil sets up to be connected on FPC and with the FPC electricity, and the coil passes the incision and keeps the clearance with the magnet.

<CIT> discloses a novel elastic sheet type linear motor. The novel elastic sheet type linear motor comprises a shell, a mass block is arranged in the shell, a support is connected to the bottom of the shell, magnetic steel is connected into the mass block, spring pieces are connected to the upper side and the lower side of the mass block, a flexible circuit board is connected to the upper portion of the support, a coil is connected to the upper portion of the flexible circuit board, the magnetic steel is connected to the mass block through a magnetic frame, and the magnetic steel, the magnetic frame and the coil form an electromagnetic structure. The invention further discloses an implementation method of the novel elastic sheet type linear motor. The two ends of the spring piece are connected with the horizontal gaskets, so that the spring piece can be conveniently connected with the shell, the support and the mass block, and the spring piece can serve as an impact face of damping foam.

Embodiments of the present application provide a motor and an electronic device, to resolve the problem that magnetic fields generated by magnetic steel and coils of current motors may interfere with devices around the motors.

To resolve the foregoing problem, the embodiments of the present application are implemented as follows:.

According to the motor in the embodiments of the present application, since no magnetic steel or coil is provided in a structure of the motor, no magnetic field interference will be generated to circuits and devices around the motor, which purifies an operating environment for the circuits and devices around the motor. In addition, the motor in the embodiments has a simple structure, which is convenient for assembly and automatic production, and the motor occupies a relatively small space, so as to better meet the requirement for thinning the electronic device.

The following clearly and completely describes the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some rather than all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative efforts fall within the protection scope of the present application.

Referring to <FIG>, this embodiment, which is not part of the present invention, provides a motor, including a housing <NUM>, a first electric vibration part <NUM>, and a mass block <NUM>; an accommodating cavity is disposed in the housing <NUM>, the first electric vibration part <NUM> and the mass block <NUM> are disposed in the accommodating cavity, a first end of the first electric vibration part <NUM> is connected to the housing <NUM>, and a second end of the first electric vibration part <NUM> is connected to the mass block; and when a voltage is applied to the first electric vibration part <NUM>, the first electric vibration part <NUM> drives the mass block <NUM> to move.

The mass block <NUM> may be a metal block, such as a tungsten alloy block, or a non-metallic block including non-metallic materials with high density. When a voltage is applied to the first electric vibration part <NUM>, the first electric vibration part <NUM> drives the mass block <NUM> to move. By applying a voltage with an alternating polarity to the first electric vibration part <NUM>, the first electric vibration part <NUM> can drive the mass block <NUM> to reciprocate, thus generating a sense of vibration.

In <FIG>, the first electric vibration part <NUM> is disposed between the mass block <NUM> and the top of the housing <NUM>, and the first electric vibration part <NUM> may also be disposed between the mass block <NUM> and the bottom of the housing <NUM>.

Since no magnetic steel or coil is provided in a structure of the motor, no magnetic field interference will be generated to circuits and devices around the motor, which purifies an operating environment for the circuits and devices around the motor. In addition, the motor in this embodiment has a simple structure, which is convenient for assembly and automatic production, and the motor occupies a relatively small space, so as to better meet the requirement for thinning the electronic device.

As shown in <FIG>, in an embodiment of the present application, the motor further includes a second electric vibration part <NUM>, where the housing <NUM> includes an upper housing <NUM> and a lower housing <NUM>;.

Polarities of voltages applied to the first electric vibration part <NUM> and the second electric vibration part <NUM> may be the same, so that directions of forces respectively applied by the first electric vibration part <NUM> and the second electric vibration part <NUM> to the mass block <NUM> are the same. By applying voltages with alternating polarities to the first electric vibration part <NUM> and the second electric vibration part <NUM> respectively, the first electric vibration part <NUM> and the second electric vibration part <NUM> drive the mass block <NUM> to reciprocate, thus generating a sense of vibration.

As shown in <FIG>, in an embodiment of the present application, the first electric vibration part <NUM> includes a first electric vibration plate <NUM> and a second electric vibration plate <NUM> that are disposed crosswise;.

Specifically, the first end of the first electric vibration plate <NUM> may be fixedly or detachably connected to the upper housing <NUM>, and the second end of the first electric vibration plate <NUM> may be connected to the first area of the mass block <NUM> by welding or gluing.

The first end of the second electric vibration plate <NUM> may be fixedly or detachably connected to the upper housing <NUM>, and the second end of the second electric vibration plate <NUM> may be connected to the second area of the mass block <NUM> by welding or gluing. The first area and the second area are symmetrically distributed based on a center point of the first surface of the mass block <NUM>.

As shown in <FIG>, in an embodiment of the present application, the second electric vibration part <NUM> includes a third electric vibration plate <NUM> and a fourth electric vibration plate <NUM> that are disposed crosswise;.

The third area and the fourth area are symmetrically distributed based on a center point of the second surface of the mass block <NUM>.

The first end of the third electric vibration plate <NUM> may be fixedly or detachably connected to the lower housing <NUM>, and the second end of the third electric vibration plate <NUM> may be connected to the first area of the mass block <NUM> by welding or gluing.

The first end of the fourth electric vibration plate <NUM> may be fixedly or detachably connected to the lower housing <NUM>, and the second end of the fourth electric vibration plate <NUM> may be connected to the second area of the mass block <NUM> by welding or gluing. The third area and the fourth area are symmetrically distributed based on a center point of the second surface of the mass block <NUM>. Further, a vertical projection of the first area on the second surface overlaps with the third area, and a vertical projection of the second area on the second surface overlaps with the fourth area.

As shown in <FIG>, in an embodiment of the present application, the motor further includes a first printed circuit board <NUM> and a second printed circuit board <NUM> electrically connected to each other, where the first printed circuit board <NUM> is disposed on the upper housing <NUM>, and the second printed circuit board <NUM> is disposed on the lower housing <NUM>;.

Both the first printed circuit board <NUM> and the second printed circuit board <NUM> may be flexible printed circuits (Flexible Printed Circuit, FPC), and the first printed circuit board <NUM> is electrically connected to the second printed circuit board <NUM>. The first printed circuit board <NUM> is disposed on the upper housing <NUM>, and the second printed circuit board <NUM> is disposed on the lower housing <NUM>. The first printed circuit board <NUM> may be fixed on the upper housing <NUM> by using the double-sided tape, and likewise, the second printed circuit board <NUM> may be fixed on the lower housing <NUM> by using the double-sided tape. Further, the second printed circuit board <NUM> is partially located outside the accommodating cavity.

The first printed circuit board <NUM> is separately electrically connected to the first surface and the second surface of the first electric vibration plate <NUM>, so as to apply a voltage to the first surface and the second surface of the first electric vibration plate <NUM>, so that the first electric vibration plate <NUM> is deformed to obtain a driving force for driving the mass block <NUM> to move; and the first printed circuit board <NUM> is separately electrically connected to the first surface and the second surface of the second electric vibration plate <NUM>, so that the second electric vibration plate <NUM> is deformed to obtain a driving force for driving the mass block <NUM> to move.

The second printed circuit board <NUM> is separately electrically connected to the first surface and the second surface of the third electric vibration plate <NUM>, so as to apply a voltage to the first surface and the second surface of the third electric vibration plate <NUM>, so that the third electric vibration plate <NUM> is deformed to obtain a driving force for driving the mass block <NUM> to move; and the second printed circuit board <NUM> is separately electrically connected to the first surface and the second surface of the fourth electric vibration plate <NUM>, so that the fourth electric vibration plate <NUM> is deformed to obtain a driving force for driving the mass block <NUM> to move.

Polarities of voltages applied to the first surface of the first electric vibration plate <NUM>, the first surface of the second electric vibration plate <NUM>, the first surface of the third electric vibration plate <NUM>, and the first surface of the fourth electric vibration plate <NUM> are the same, polarities of voltages applied to the second surface of the first electric vibration plate <NUM>, the second surface of the second electric vibration plate <NUM>, the second surface of the third electric vibration plate <NUM>, and the second surface of the fourth electric vibration plate <NUM> are the same. In this way, deformation directions of the first electric vibration plate <NUM>, the second electric vibration plate <NUM>, the third electric vibration plate <NUM>, and the fourth electric vibration plate <NUM> are the same, so that directions of the generated driving forces are the same. The first electric vibration plate <NUM>, the second electric vibration plate <NUM>, the third electric vibration plate <NUM>, and the fourth electric vibration plate <NUM> drive the mass block <NUM> to move along a same direction.

That the first electric vibration plate <NUM>, the second electric vibration plate <NUM>, the third electric vibration plate <NUM>, and the fourth electric vibration plate <NUM> drive the mass block <NUM> to move in the same direction under the action of the voltage polarity of the first surface and the voltage polarity of the second surface respectively refers to that deformation directions of the first electric vibration plate <NUM>, the second electric vibration plate <NUM>, the third electric vibration plate <NUM>, and the fourth electric vibration plate <NUM> under the action of the voltage polarity of the first surface and the voltage polarity of the second surface are the same. Therefore, the directions of the generated driving forces are the same, and the first electric vibration plate <NUM>, the second electric vibration plate <NUM>, the third electric vibration plate <NUM>, and the fourth electric vibration plate <NUM> drive the mass block <NUM> to move along the same direction.

As shown in <FIG>, in an embodiment of the present application, the motor further includes a first gasket <NUM> and a second gasket <NUM>, where the first electric vibration plate <NUM> is electrically connected to the first printed circuit board <NUM> on the upper housing <NUM> through the first gasket <NUM>; and likewise, the second electric vibration plate <NUM> is electrically connected to the first printed circuit board <NUM> on the upper housing <NUM> through the second gasket <NUM>.

The first gasket <NUM> is connected to the first end of the first electric vibration plate <NUM> by welding or gluing. The first gasket <NUM> may include a first upper gasket and a first lower gasket, and the first upper gasket and the first lower gasket are respectively in contact with the first surface and the second surface of the first electric vibration plate <NUM>. When the first gasket <NUM> is electrically connected to the first printed circuit board <NUM>, polarities of voltages applied to the first upper gasket and the first lower gasket are opposite, so that polarities of voltages applied to the first surface and the second surface of the first electric vibration plate <NUM> are opposite. As a result, the first electric vibration plate <NUM> is deformed and drives the mass block <NUM> to move.

Likewise, the second gasket <NUM> is connected to the first end of the second electric vibration plate <NUM> by welding or gluing. The second gasket <NUM> may include a second upper gasket and a second lower gasket, and the second upper gasket and the second lower gasket are respectively in contact with the first surface and the second surface of the second electric vibration plate <NUM>. When the second gasket <NUM> is electrically connected to the first printed circuit board <NUM>, polarities of voltages applied to the second upper gasket and the second lower gasket are opposite, so that polarities of voltages applied to the first surface and the second surface of the second electric vibration plate <NUM> are opposite. As a result, the second electric vibration plate <NUM> is deformed and drives the mass block <NUM> to move.

Further, the motor further includes a third gasket and a fourth gasket, where the third electric vibration plate <NUM> is electrically connected to the second printed circuit board <NUM> on the lower housing <NUM> through the third gasket; and the fourth electric vibration plate <NUM> is electrically connected to the second printed circuit board <NUM> on the lower housing <NUM> through the fourth gasket.

The third gasket is connected to the first end of the third electric vibration plate <NUM> by welding or gluing. The third gasket may include a third upper gasket and a third lower gasket, and the third upper gasket and the third lower gasket are respectively in contact with the first surface and the second surface of the third electric vibration plate <NUM>. When the third gasket is electrically connected to the second printed circuit board <NUM>, polarities of voltages applied to the third upper gasket and the third lower gasket are opposite, so that polarities of voltages applied to the first surface and the second surface of the third electric vibration plate <NUM> are opposite. As a result, the third electric vibration plate <NUM> is deformed and drives the mass block <NUM> to move.

Likewise, the fourth gasket is connected to the first end of the fourth electric vibration plate <NUM> by welding or gluing. The fourth gasket may include a fourth upper gasket and a fourth lower gasket, and the fourth upper gasket and the fourth lower gasket are respectively in contact with the first surface and the second surface of the fourth electric vibration plate <NUM>. When the fourth gasket is electrically connected to the second printed circuit board <NUM>, polarities of voltages applied to the fourth upper gasket and the fourth lower gasket are opposite, so that polarities of voltages applied to the first surface and the second surface of the fourth electric vibration plate <NUM> are opposite. As a result, the fourth electric vibration plate <NUM> is deformed and drives the mass block <NUM> to move.

As shown in <FIG>, in an embodiment of the present application, the motor further includes a first damping part 10A and a second damping part 10B, where the first damping part 10A is disposed in a fifth area of the upper housing <NUM>, and the second damping part 10B is disposed in a sixth area of the upper housing <NUM>; and
a vertical projection of a boundary line of the first surface of the mass block <NUM> on the upper housing <NUM> partially overlaps with the fifth area, and a vertical projection of a boundary line of the first surface of the mass block <NUM> on the upper housing <NUM> partially overlaps with the sixth area. In this way, when the mass block <NUM> moves toward the upper housing <NUM>, the first damping part 10A and the second damping part 10B may play an anti-collision role, to prevent the mass block from hitting the upper housing <NUM>, which may cause the motor to be damaged. In addition, the noise caused by the mass block hitting the upper housing <NUM> can be reduced.

Likewise, the motor further includes a third damping part and a fourth damping part, where the third damping part is disposed in a seventh area of the lower housing <NUM>, and the fourth damping part is disposed in an eighth area of the lower housing <NUM>; and
a vertical projection of a boundary line of the second surface of the mass block <NUM> on the lower housing <NUM> partially overlaps with the seventh area, and a vertical projection of a boundary line of the second surface of the mass block <NUM> on the lower housing <NUM> partially overlaps with the eighth area. In this way, when the mass block <NUM> moves toward the lower housing <NUM>, the third damping part and the fourth damping part may play an anti-collision role, to prevent the mass block from hitting the lower housing <NUM>, which may cause the motor to be damaged. In addition, the noise caused by the mass block hitting the lower housing <NUM> can be reduced.

The first damping part 10A may be made of damping foam, and the dynamic characteristics of the damping foam change little with temperature, which may ensure the stable operation of the motor under high and low temperatures and little change of a sense of vibration, thus avoiding the noise generated by the mass block <NUM> hitting the upper housing <NUM> and the lower housing <NUM> due to excessive displacement. The second damping part, the third damping part, and the fourth damping part may also be made of the damping foam.

In an embodiment of the present application, the motor further includes a first bracket and a second bracket, where the first bracket is connected to the first electric vibration plate <NUM>, and the second bracket is connected to the second electric vibration plate <NUM>; and
the first electric vibration plate <NUM> is fixedly connected to the first area of the mass block <NUM> through the first bracket; and the second electric vibration plate <NUM> is fixedly connected to the second area of the mass block <NUM> through the second bracket.

That is, the first bracket is separately connected to the second end of the first electric vibration plate <NUM> and the first area of the mass block <NUM>; and the second bracket is separately connected to the second end of the second electric vibration plate <NUM> and the second area of the mass block <NUM>. The first bracket and the second bracket may be made of low-cost insulating materials, so as to save the amount of the electric vibration plate and reduce the cost of the motor.

In an embodiment of the present application, both the first electric vibration plate <NUM> and the second electric vibration plate <NUM> are ion-conductive vibration plates;.

Further, when the voltage applied to the first electric vibration plate <NUM> and the voltage applied to the second electric vibration plate <NUM> are both a first voltage, the first electric vibration plate <NUM> and the second electric vibration plate <NUM> drive the mass block <NUM> to move for a first distance along the first direction; or.

As shown in <FIG>, the ion-conductive vibration plate includes a first electrode layer <NUM>, an ion exchange resin layer <NUM>, and a second electrode layer <NUM> stacked in sequence, and the ion exchange resin layer <NUM> is provided with polymer electrolyte. The ion-conductive vibration plate may be made of an ion-exchange polymer metal composite (ion-exchange polymer metal composite, IPMC). The IPMC is a new electrically actuated functional material, which takes the ion exchange resin layer (such as the fluorocarbon polymer) as a substrate, and precious metals (such as platinum and silver) are plated on the surface of the substrate to form an electrode layer, namely, the first electrode layer <NUM> and the second electrode layer <NUM>. The ion exchange resin layer <NUM> includes the polymer electrolyte, which includes cations and anions. Positions and numbers of the cations and anions in <FIG> are only for illustration and do not represent the actual situation. As shown in <FIG>, when a voltage is applied to the IPMC in a thickness direction, hydrated cations in the polymer electrolyte may move to a cathode side, causing a swelling difference between the anode surface and the cathode surface of the IPMC, so that the IPMC is deformed and bends towards the anode surface. In this way, a bending degree of the IPMC may be controlled by controlling the voltage or current of the IPMC, so that the IPMC generates displacement in the lateral direction.

The IPMC is a new driving material with the advantages of light driving mass, large displacement and deformation, low driving voltage, and the like. The advantages of adopting the IPMC are obvious. For example, the IPMC is a non-magnetic material and may not produce magnetic interference; and the displacement and velocity caused by IPMC deformation decrease in proportion to the thickness of the IPMC, while the force caused by IPMC deformation increases in proportion to the cube of the thickness of the IPMC. Therefore, the thickness of the IPMC may be set based on the actual situation to obtain the required displacement, velocity, and force generated by IPMC deformation.

By applying a voltage to the ion-conductive vibration plate, cations in the polymer electrolyte move to a cathode side, causing a swelling difference between the front and the back of the ion-conductive vibration plate. This difference may cause the ion-conductive vibration plate to deform, and alternately change a direction of the voltage applied to the ion-conductive vibration plate, so that a deformation direction of the ion-conductive vibration plate changes alternately, thereby driving the mass block <NUM> to move alternately and generating a sense of vibration. A vibration amplitude can be from <NUM> to <NUM>, and the vibration amplitude can be controlled by setting the thickness of the ion-conductive vibration plate and adjusting the magnitude of a current passing through the ion-conductive vibration plate.

<FIG> is a schematic diagram of distribution of cations in the ion-conductive vibration plate when a forward current passes through the ion-conductive vibration plate. Cations move to a cathode side of the ion-conductive vibration plate, the ion-conductive vibration plate moves upward and drives the mass block <NUM> to move upward, and a direction shown by an arrow in <FIG> is a movement direction of the ion-conductive vibration plate.

<FIG> is a schematic diagram of distribution of cations in the ion-conductive vibration plate when a reverse current passes through the ion-conductive vibration plate. Cations move to a cathode side of the ion-conductive vibration plate, the ion-conductive vibration plate moves downward and drives the mass block <NUM> to move downward, and a direction shown by an arrow in <FIG> is a movement direction of the ion-conductive vibration plate. By application of a voltage to an ion-conductive vibration plate, cations in polymer electrolyte of the ion-conductive vibration plate move to the cathode side, causing a difference in swelling between the front and the back of the ion-conductive vibration plate and then causing the ion-conductive vibration plate to deform. When an alternating current is applied to the ion-conductive vibration plate, the ion-conductive vibration plate may drive the mass block <NUM> to vibrate reciprocally, thus generating a sense of vibration.

Further, when the voltage applied to the first electric vibration plate <NUM> and the voltage applied to the second electric vibration plate <NUM> are both a first voltage, the first electric vibration plate <NUM> and the second electric vibration plate <NUM> drive the mass block <NUM> to move along the first direction at a first rate; and.

Further, the first electric vibration plate <NUM>, the second electric vibration plate <NUM>, the third electric vibration plate <NUM>, and the fourth electric vibration plate <NUM> are all ion-conductive vibration plates, the ion-conductive vibration plate includes a first electrode layer, an ion exchange resin layer, and a second electrode layer stacked in sequence, and the ion exchange resin layer is provided with polymer electrolyte. Directions of forces acting on the mass block <NUM> by the first electric vibration plate <NUM>, the second electric vibration plate <NUM>, the third electric vibration plate <NUM>, and the fourth electric vibration plate <NUM> are the same, for example, the direction is the first direction or the second direction, and this joint force drives the mass block <NUM> to move.

In <FIG>, the first electric vibration plate <NUM>, the second electric vibration plate <NUM>, the third electric vibration plate <NUM>, and the fourth electric vibration plate <NUM> drive the mass block <NUM> to move toward the first direction, and a movement direction is shown by an arrow in <FIG>. In <FIG>, the first electric vibration plate <NUM>, the second electric vibration plate <NUM>, the third electric vibration plate <NUM>, and the fourth electric vibration plate <NUM> drive the mass block <NUM> to move toward the second direction, and a movement direction is shown by an arrow in <FIG>.

An embodiment of the present application further provides an electronic device, including the motor according to any one of the foregoing embodiments.

Claim 1:
A motor, comprising a housing (<NUM>), a first electric vibration part (<NUM>), and a mass block (<NUM>), wherein
an accommodating cavity is disposed in the housing (<NUM>), the first electric vibration part (<NUM>) and the mass block (<NUM>) are disposed in the accommodating cavity, a first end of the first electric vibration part (<NUM>) is connected to the housing (<NUM>), and a second end of the first electric vibration part (<NUM>) is connected to the mass block (<NUM>); and
when a voltage is applied to the first electric vibration part (<NUM>), the first electric vibration part (<NUM>) drives the mass block (<NUM>) to move;
characterized in that,
the motor further a second electric vibration part (<NUM>), the housing (<NUM>) comprises an upper housing (<NUM>) and a lower housing (<NUM>), the upper housing (<NUM>) and the lower housing (<NUM>) cooperate to form the accommodating cavity, the first electric vibration part (<NUM>), the mass block (<NUM>), and the second electric vibration part (<NUM>) are disposed in the accommodating cavity;
the first electric vibration part (<NUM>) is disposed on the upper housing (<NUM>), the second electric vibration part (<NUM>) is disposed on the lower housing (<NUM>), the mass block (<NUM>) is disposed between the first electric vibration part (<NUM>) and the second electric vibration part (<NUM>), and the mass block (<NUM>) is separately connected to the first electric vibration part (<NUM>) and the second electric vibration part (<NUM>); and
when a voltage is applied to the first electric vibration part (<NUM>) and the second electric vibration part (<NUM>), the first electric vibration part (<NUM>) and the second electric vibration part (<NUM>) drive the mass block (<NUM>) to move;
the first electric vibration part (<NUM>) comprises a first electric vibration plate (<NUM>) and a second electric vibration plate (<NUM>) that are disposed crosswise;
a first end of the first electric vibration plate (<NUM>) is connected to the upper housing (<NUM>), and a second end of the first electric vibration plate (<NUM>) is connected to a first area of the mass block (<NUM>);
a first end of the second electric vibration plate (<NUM>) is connected to the upper housing (<NUM>), and a second end of the second electric vibration plate (<NUM>) is connected to a second area of the mass block (<NUM>); and
the first area and the second area are located on a first surface of the mass block (<NUM>).