CN219678300U - Bidirectional action sound wave motor and electric toothbrush - Google Patents

Abstract

The utility model provides a bidirectional-motion acoustic motor, which comprises a shell component, an output shaft, a deflection component and a radial component, wherein the shell component comprises a shell, a front end cover and a rear end cover, the shell is of a cylindrical structure which extends along the axial direction of the output shaft and is open at two ends, the front end cover and the rear end cover are respectively covered at two ends of the shell, the output shaft is rotatably arranged on the front end cover and the rear end cover, the deflection component and the radial component are arranged in the shell and are positioned at two ends of the shell, the deflection component drives the output shaft to deviate around the axis of the output shaft and do reciprocating swing, and the radial component drives the output shaft to do reciprocating rectilinear motion in the axial direction of the output shaft. An electric toothbrush manufactured by using the above-mentioned bidirectional sound wave motor as a drive is also provided. The output shaft is driven by the bidirectional-motion sound wave motor to perform regular reciprocating motion, and brushing action on a plurality of angles between the tooth surface and the tooth gap is performed, so that the tooth surface is more complete and thorough to clean, and the noise is small, and the use is comfortable and convenient.

Description

Bidirectional action sound wave motor and electric toothbrush

Technical Field

The utility model relates to the technical field of acoustic motors, in particular to a bidirectional action acoustic motor and an electric toothbrush.

Background

In the prior art, there are two main types of electric toothbrushes: rotation and vibration. The rotating toothbrush has simple principle, namely, the motor drives the round brush head to rotate; the vibration type electric toothbrush is more complex, and an electric driven vibration motor is arranged in the vibration type electric toothbrush, so that the brush head can generate high-frequency swing perpendicular to the direction of the brush handle.

An acoustic wave toothbrush refers to a toothbrush in which the frequency of vibration of the brush head is on the order of the frequency of the acoustic wave, and is therefore also known as an acoustic wave vibrating toothbrush. Brushing with "sonic" is not literally understood, as bristles, which are just like sonic mechanical wave frequencies, move rapidly, creating a super-strong cleaning effect that is nearly 100 times better than conventional manual toothbrushes.

Publication number CN113595324B, publication date 2022.09.27 discloses a sound wave motor and electric toothbrush with sound wave motor, through setting up by body, fixed axle sleeve, eccentric groove, movable axle sleeve, the eccentric part that fixed axle and rib constitute, by connecting plate, the swinging member that first through-hole and movable axle constitute, the motion of driving piece drive eccentric part realizes the swing of swinging member, and then realizes the swing of pivot, reduces equipment process and manufacturing cost, satisfies different consumer demands.

When the swing type acoustic wave motor swings at a high frequency, only the swing in the direction vertical to the shaft exists, the combination of axial expansion and contraction and vertical and axial directions is avoided, the action is single, and the function is monotonous. When the electric toothbrush combined by the swinging type acoustic wave motor is used for high-frequency swinging cleaning, the direction of driving the brush hair to move is straight up and down, the high-frequency swinging type toothbrush lacks a transverse cleaning function in an oral cavity, a place with insufficient cleaning force or dead angle still exists between the tooth surface and the tooth gap, the cleaning effect is incomplete and not thorough, meanwhile, the motor is used for driving the motor to swing, more parts for transmitting force are used, noise is large, the durability is low, and the use is not comfortable enough.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model provides a bidirectional action sound wave motor, which solves the technical problems that the swing type sound wave motor in the prior art only swings in the vertical direction with the shaft, has no axial expansion and contraction and no combination of vertical and axial directions, has single action and has monotonous function when swinging at high frequency.

According to the technical scheme, the bidirectional sound wave motor comprises a shell component, an output shaft, a deflection component and a radial component, wherein the shell component comprises a shell, a front end cover and a rear end cover, the shell is of a cylindrical structure which extends along the axial direction of the output shaft and is open at two ends, the front end cover and the rear end cover are respectively covered at two ends of the shell, the output shaft is rotatably arranged on the front end cover and the rear end cover, the deflection component and the radial component are arranged in the shell and are positioned at two ends of the shell, the deflection component drives the output shaft to deflect around the axis of the output shaft and reciprocate, and the radial component drives the output shaft to reciprocate in the axial direction of the output shaft.

The technical principle of the utility model is as follows: the deflection assembly arranged in the shell drives the output shaft to deflect around the axis and reciprocate, the radial assembly drives the output shaft to reciprocate in the axial direction, and the output shaft and the radial assembly act simultaneously and can also act separately, so that the output shaft can perform regular reciprocating motion in the direction perpendicular to the shaft and in the axial direction, the effect is better, and larger and more functions can be realized.

Compared with the prior art, the utility model has the following beneficial effects: the output shaft is driven to swing reciprocally around the axial center of the output shaft by the deflection assembly, and the output shaft is driven to do reciprocating rectilinear motion in the axial direction of the output shaft by the radial assembly, so that the technical problems that the output shaft does not have axial expansion and contraction and combination of vertical and axial directions and has single action and monotonous functions when the oscillating type acoustic motor swings at high frequency are solved, the output shaft is enabled to do regular reciprocating motion in the axial direction and the vertical direction of the output shaft, the action effect is better, and the beneficial effects of larger and more functions can be realized.

Still further, deflection subassembly includes mount, circumference spacing magnet, circumference beat coil, the mount is annular to be fixed on the inner wall of shell, circumference spacing magnet is provided with four that have unipolar and on the output shaft cross-section symmetry interval is fixed on the mount, its N, S pole is arranged in proper order, circumference beat coil winding is fixed on the mount, and install in the circumference spacing magnet, be provided with the circumference beat iron core that is located between the circumference spacing magnet between the circumference beat coil, circumference beat iron core with output shaft fixed connection, circumference beat coil inserts first square wave signal current, and the magnetic field direction that forms is located on the output shaft cross-section.

Furthermore, the circumference deflection iron core adopts silicon steel iron core.

Further, the deflection angle of the output shaft is +/-6 degrees.

Further, the magnetic pole center line of the circumferential hypocycloid ring is parallel to the circumferential limit magnets and is positioned at the centers of two adjacent circumferential limit magnets.

Still further, radial subassembly includes axial motion magnet, axial motion coil, axial motion magnet fixed connection is in on the output shaft, axial motion coil twine on the output shaft and be located between axial motion magnet and the rear end cap, be provided with axial motion iron core in the axial motion coil, axial motion iron core is fixed with the output shaft, axial motion coil inserts the second square wave signal current.

Further, the axially moving iron core silicon steel core.

Further, the axial movement amplitude of the output shaft is 1-1.5 mm.

Furthermore, the end part of the output shaft positioned on the front end cover is detachably connected with a mounting head, the mounting head is rotationally connected with the front end cover, the end part of the mounting head positioned in the shell is fixedly connected with a clamping part, and the distance between the clamping part and the front end cover is the maximum value of the axial movement of the output shaft.

The utility model also provides an electric toothbrush, which solves the technical problems that when the electric toothbrush in the prior art performs high-frequency swing cleaning, the direction of driving the brush hair to move is straight up and down, the high-frequency swing toothbrush lacks a transverse cleaning function in the oral cavity, the cleaning force is insufficient or dead angles still exist between the tooth surface and the tooth gap, the cleaning effect is incomplete and incomplete, meanwhile, the motor drives the electric toothbrush to swing, parts for transmitting force are more, noise is large, the durability is low, and the electric toothbrush is uncomfortable to use.

According to another technical scheme of the utility model, the electric toothbrush manufactured by using the bidirectional sound wave motor as the drive is driven by the bidirectional sound wave motor to drive the output shaft to regularly reciprocate in the direction perpendicular to the shaft and in the axial direction, and the brushing action on a plurality of angles between the clean tooth surface and the tooth gap is performed, so that the tooth surface is more complete and thorough, the time is saved, the parts are fewer, the noise is less, and the use is comfortable and convenient.

Drawings

FIG. 1 is a schematic view of an embodiment of the present utility model in axial cut-away configuration.

Fig. 2 is a schematic cross-sectional view of an embodiment of the present utility model.

In the above figures: the device comprises a shell assembly 1, a shell 11, a front end cover 12, a rear end cover 13, an output shaft 2, a mounting head 21, a clamping part 22, a deflection assembly 3, a fixing frame 31, a circumference limiting magnet 32, a circumference deflection coil 33, a circumference deflection iron core 34, a radial assembly 4, an axial moving magnet 41, an axial moving coil 42 and an axial moving iron core 43.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.

As shown in fig. 1 and fig. 2, the embodiment of the utility model provides a bidirectional sound wave motor, which comprises a shell component 1, an output shaft 2, a deflection component 3 and a radial component 4, wherein the shell component 1 comprises a shell 11, a front end cover 12 and a rear end cover 13, the shell 11 is of a cylindrical structure which extends along the axial direction of the output shaft 2 and is open at two ends, the front end cover 12 and the rear end cover 13 are respectively covered at two ends of the shell 11, the output shaft 2 is rotatably arranged on the front end cover 12 and the rear end cover 13, bearings which are rotatably connected with the output shaft 2 are respectively arranged on the front end cover 12 and the rear end cover 13, the deflection component 3 and the radial component 4 are arranged in the shell 11 and are positioned at two ends of the shell, the deflection component 3 drives the output shaft 2 to deflect around the axis of the output shaft and reciprocate, and the radial component 4 drives the output shaft 2 to reciprocate in the axial direction of the output shaft 2.

In this embodiment, the deflection assembly 3 disposed in the housing 11 drives the output shaft to deflect around its axis and reciprocate, and the radial assembly 4 drives the output shaft 2 to reciprocate in its axial direction, so that the output shaft 2 can reciprocate regularly in both directions perpendicular to the shaft and in the axial direction.

According to another embodiment of the present utility model, the deflection assembly 3 includes a fixing frame 31, a circumferential spacing magnet 32, and a circumferential deflection coil 33, the fixing frame 31 is fixed on the inner wall of the housing 11 in a ring shape, the circumferential spacing magnet 32 is provided with four pieces with a single polarity and is fixed on the fixing frame 31 at symmetrical intervals on the section of the output shaft 2, the N, S poles thereof are sequentially arranged, the circumferential deflection coil 33 is wound and fixed on the fixing frame 31 and is installed in the circumferential spacing magnet 32, a circumferential deflection iron core 34 located between the circumferential spacing magnets 32 is disposed between the circumferential deflection coils 33, the circumferential deflection iron core 34 is fixedly connected with the output shaft 2, the circumferential deflection coil 33 is connected with the first square wave signal current, and the formed magnetic field direction is located on the section of the output shaft 2.

In this embodiment, as shown in fig. 1 and 2, a first square wave signal current with a specification of positive and negative square waves 280Hz, 3.7v and a duty ratio @ F0 of 65-75% is connected to the circumference deflection coil 33, in the positive wave band, the circumference deflection coil 33 magnetizes the circumference deflection iron core 34, the magnetic pole generated by the circumference deflection iron core 34 is the same as the magnetic pole of one of the two adjacent circumference limit magnets 32, and is opposite to the magnetic pole of the other, and according to the principles of opposite attraction and same polarity repulsion, the circumference limit magnets 32 with the same magnetic property push the circumference deflection iron core 34 to shift and rotate, so as to drive the output shaft 2 to shift, and the other end is the same; in the negative wave band, opposite to the positive wave band, the offset direction of the output shaft 2 is the same, and under the action of continuous first square wave signal current, the output shaft 2 offsets around the axis of the output shaft and makes reciprocating swing, so that the reciprocating swing action of high-frequency action is realized, and the reciprocating swing can be realized while the high-frequency action is ensured.

According to another embodiment of the present utility model, the circumferential deflection iron core 34 is a silicon steel iron core, so as to increase the instantaneous magnetic force of the circumferential deflection iron core 34 being magnetized, shorten the magnetization reaction time, and increase the frequency of deflection of the output shaft 2.

According to another embodiment of the present utility model, as shown in fig. 2, a bi-directional motion acoustic wave motor, the deflection angle of the output shaft 2 is ±6°, corresponding to the angle a, and the deflection angle is increased as much as possible on the basis of guaranteeing the oscillation frequency of the output shaft 2.

According to another embodiment of the present utility model, in a bi-directional motion acoustic wave motor, the magnetic pole center line of the circumferential deflection coil 33 is parallel to the circumferential limit magnets 32 and is located at the centers of two adjacent circumferential limit magnets 32, and the circumferential deflection iron core 34 deflects centrally, so that the output shaft 2 operates more stably.

According to another embodiment of the present utility model, as shown in fig. 1, the radial assembly 4 includes an axial moving magnet 41 and an axial moving coil 42, the axial moving magnet 41 is fixedly connected to the output shaft 2, the axial moving coil 42 is wound on the output shaft 2 and is located between the axial moving magnet 41 and the rear end cover 13, an axial moving iron core 43 is disposed in the axial moving coil 42, the axial moving iron core 43 is fixed to the output shaft 2, and the axial moving coil 42 is connected to a second square wave signal current.

In this embodiment, a second square wave signal current with a specification of positive and negative square waves 30-40Hz, 3.7v and a duty ratio @ f0 of 50-60% is connected to the axial moving coil 42, the axial moving coil 42 magnetizes the axial moving iron core 43, the magnetism of the axial moving iron core 43 is the same as that of the axial moving magnet 41, the axial moving iron core 43 pulls the axial moving magnet 41 to the axial moving iron core 43, and then pulls the output shaft 2 to move in the axial direction, the magnetism of the axial moving iron core 43 is opposite to that of the axial moving magnet 41, and the output shaft 2 moves in the opposite axial direction, so as to realize the high-frequency motion reciprocating movement of the output shaft 2 in the axial direction.

According to another embodiment of the present utility model, a bi-directional motion acoustic wave motor, the silicon steel core of the axially moving core 43 increases the instantaneous magnetic force of the axially moving core 43 being magnetized, shortens the magnetization reaction time, and increases the axial motion frequency of the output shaft 2.

According to another embodiment of the utility model, a bi-directional motion acoustic motor is provided, wherein the axial motion amplitude of the output shaft 2 is 1-1.5 mm. The axial movement distance is maximally extended while high frequency operation is ensured.

According to another embodiment of the present utility model, as shown in fig. 1, a mounting head 21 is detachably connected to the end of the output shaft 2 located at the front end cover 12, the mounting head 21 is fixed to the output shaft 2 by using a screw or the like, the mounting head 21 is rotatably connected to the front end cover 12, a clamping portion 22 is fixedly connected to the end of the mounting head 21 located in the housing, and the distance between the clamping portion 22 and the front end cover 12 is the maximum value of the axial movement of the output shaft 2. The axial displacement of the output shaft 2 is limited by the catch 22.

According to another embodiment of the present utility model, as shown in fig. 1, an electric toothbrush is manufactured using the above-described bidirectional acoustic wave motor as a drive. The output shaft 2 is driven by the bidirectional sound wave motor to regularly reciprocate in the directions perpendicular to the shaft and in the axial direction, and brushing action on a plurality of angles between the tooth surface and the tooth gap is performed, so that the tooth surface is more completely and thoroughly cleaned, the time is saved, the parts are fewer, the noise is small, and the use is comfortable and convenient.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.

Claims (10)

1. The utility model provides a bidirectional motion sound wave motor, its characterized in that, includes casing subassembly, output shaft, deflection subassembly and radial subassembly, the casing subassembly includes shell, front end housing and rear end cap, the shell is for along the open tubular structure in output shaft axial extension and both ends, on front end housing and the rear end cap respectively the lid close in the both ends of shell, the output shaft rotates and installs on front end housing and the rear end cap, deflection subassembly and radial subassembly set up in the shell and be located the both ends of casing, deflection subassembly drive the output shaft is round its axle center skew and is reciprocating swing, radial subassembly drive the output shaft is reciprocating rectilinear motion in its axial direction.

2. A bi-directional motion acoustic wave motor as defined in claim 1, wherein: the deflection assembly comprises a fixing frame, circumference limit magnets and circumference deflection coils, wherein the fixing frame is annularly fixed on the inner wall of the shell, the circumference limit magnets are provided with four pieces with single polarity and are symmetrically fixed on the section of an output shaft at intervals on the fixing frame, N, S poles of the circumference limit magnets are sequentially arranged, the circumference deflection coils are wound and fixed on the fixing frame and are arranged in the circumference limit magnets, circumference deflection iron cores positioned between the circumference limit magnets are arranged between the circumference deflection coils, the circumference deflection iron cores are fixedly connected with the output shaft, the circumference deflection coils are connected with first square wave signal currents, and the formed magnetic field direction is positioned on the section of the output shaft.

3. A bi-directional motion acoustic wave motor as defined in claim 2, wherein: the circumference beat iron core adopts silicon steel iron core.

4. A bi-directional motion acoustic wave motor as defined in claim 2, wherein: the deflection angle of the output shaft is +/-6 degrees.

5. A bi-directional motion acoustic wave motor as defined in claim 2, wherein: the magnetic pole center line of the circumference hypocycloid ring is parallel to the circumference limit magnets and is positioned at the centers of two adjacent circumference limit magnets.

6. A bi-directional motion acoustic wave motor as defined in claim 1, wherein: the radial assembly comprises an axial moving magnet and an axial moving coil, the axial moving magnet is fixedly connected to the output shaft, the axial moving coil is wound on the output shaft and located between the axial moving magnet and the rear end cover, an axial moving iron core is arranged in the axial moving coil, the axial moving iron core is fixed to the output shaft, and the axial moving coil is connected to second square wave signal current.

7. A bi-directional motion acoustic wave motor according to claim 6 wherein: the axial movement iron core silicon steel iron core.

8. A bi-directional motion acoustic wave motor according to claim 6 wherein: the axial movement amplitude of the output shaft is 1-1.5 mm.

9. A bi-directional motion acoustic wave motor as defined in claim 1, wherein: the end part of the output shaft, which is positioned on the front end cover, is detachably connected with a mounting head, the mounting head is rotationally connected with the front end cover, a clamping part is fixedly connected with the end part of the mounting head, which is positioned in the shell, and the distance between the clamping part and the front end cover is the maximum value of the axial movement of the output shaft.

10. An electric toothbrush, characterized in that: an electric toothbrush manufactured using the bidirectional acoustic motor according to any one of claims 1 to 9 as a drive.