CN217282641U

CN217282641U - Electromagnetic vibration exciter for electric toothbrush

Info

Publication number: CN217282641U
Application number: CN202220653911.4U
Authority: CN
Inventors: 黄志勇; 张波
Original assignee: Wenzhou Liangte Electric Co ltd
Current assignee: Wenzhou Liangte Electric Co ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-08-23
Anticipated expiration: 2032-03-24

Abstract

The utility model relates to an electromagnetic exciter for electric toothbrush, characterized by only constitute by support, winding part, active cell part assembly, winding part fixed mounting is in the support, active cell part rotates and installs in the support, and active cell part includes shell fragment subassembly, two pairs of permanent magnets, yoke, output shaft, and shell fragment subassembly, two pairs of permanent magnets, yoke, output shaft are all installed on the active cell support, and shell fragment subassembly rotates the suit in the support, and two pairs of permanent magnets correspond the cooperation with a certain U type iron core magnetic pole of winding part respectively, shell fragment subassembly and output shaft fixed connection, have the air gap between permanent magnet magnetic pole face and the U type iron core magnetic pole face that corresponds. The bearing support structure is simple in structure and convenient to install, saves the bearing support mode, reduces product cost and working noise, and is convenient for batch production.

Description

Electromagnetic vibration exciter for electric toothbrush

Technical Field

The application relates to an electromagnetic vibrator for an electric toothbrush, which is mainly suitable for power driving of the electric toothbrush.

Background

The electric toothbrush in the prior art usually adopts a swing motor to drive a toothbrush head to rotate back and forth in a small amplitude to brush teeth, and a rotor part in the swing motor is sleeved on an output shaft through a bearing, so that the product cost and the working noise are improved on one hand, and the service life of the product is also influenced on the other hand.

Disclosure of Invention

The technical problem that this application was solved is overcome the above-mentioned not enough that exists among the prior art, and provides a structure succinct, simple to operate, and is with low costs, and work small in noise, the electric toothbrush for electric magnetic shock absorber of the batch production of being convenient for.

The technical scheme adopted by the application for solving the technical problems is as follows: the utility model provides an electromagnetic exciter for electric toothbrush, characterized by only comprises support, winding part, active cell part assembly, winding part can adopt prior art and fixed mounting in the support, active cell part rotates to be installed in the support, and active cell part includes shell fragment subassembly, two pairs of permanent magnets, yoke, output shaft, and shell fragment subassembly, two pairs of permanent magnets, yoke, output shaft are all installed on the active cell support, and the shell fragment subassembly rotates the suit in the support, and two pairs of permanent magnets correspond the cooperation with a certain U type iron core magnetic pole of winding part respectively, shell fragment subassembly and output shaft fixed connection, have the air gap between permanent magnet magnetic pole face and the U type iron core magnetic pole face that corresponds.

The air gap is 0.2-1 mm.

Two pairs of permanent magnets are distributed in a vertical and horizontal symmetrical mode relative to the central shaft of the rotor part, two magnetic pole faces of the U-shaped iron core are distributed in a vertical and horizontal symmetrical mode relative to the central shaft of the rotor part, and the axial center of any one magnetic pole face of the U-shaped iron core is overlapped with the axial centers of the corresponding pair of permanent magnets.

The elastic piece assembly is formed by fixedly connecting an elastic piece, a front elastic piece fixing sleeve, a middle elastic piece fixing sleeve and a rear elastic piece fixing sleeve, wherein the front elastic piece fixing sleeve, the middle elastic piece fixing sleeve and the rear elastic piece fixing sleeve are respectively positioned at the front part, the middle part and the rear part of the elastic piece, and the front elastic piece fixing sleeve, the middle elastic piece fixing sleeve and the rear elastic piece fixing sleeve are respectively matched with the support.

The support, the elastic sheet front fixing sleeve, the elastic sheet middle fixing sleeve and the elastic sheet rear fixing sleeve are all made of plastics.

This application the support comprises upper bracket, undersetting, and the upper bracket passes through screw or buckle with the undersetting and is connected fixedly.

Compared with the prior art, the application has the following advantages and effects: the structure is simple, the bearing supporting mode is saved, the product cost and the working noise are reduced, and the mass production is convenient.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

Fig. 2 is a schematic sectional view a-a of fig. 1.

Fig. 3 is a schematic diagram of the force-receiving direction of the mover component of the embodiment of the present application when viewed from the left side of fig. 1 and the coil current causes the U-shaped core magnetic pole 221 to assume the left N and right S states.

Fig. 4 is a schematic diagram of the force-receiving direction of the mover member of the embodiment of the present application when viewed from the left side of fig. 1 and the coil current causes the U-shaped core magnetic pole 221 to assume the left S-right N state.

Fig. 5 is a schematic structural view of the spring assembly shown in fig. 1.

Fig. 6 is a schematic top view of fig. 5.

In the figure: the magnetic-field-induced magnetic-field generator comprises a support 1, an upper support 11, a lower support 12, a winding part 2, a coil 21, a U-shaped iron core (stator iron core) 22, a U-shaped iron core magnetic pole surface 221, a mover part 3, a spring assembly 31, a spring sheet 311, a spring sheet front fixing sleeve 312, a spring sheet middle fixing sleeve 313, a spring sheet rear fixing sleeve 314, a magnetic yoke 32, a permanent magnet 33, a permanent magnet magnetic pole surface 331, a mover support 34 and an output shaft 35.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of examples, which are illustrative of the present application and are not limited to the following examples. The right side in the figure is front, and the left side is back, and the axial directions all refer to the front-back direction in the application.

Referring to fig. 1 to 6, an electromagnetic vibrator for an electric toothbrush according to an embodiment of the present invention is assembled from a base 1 (including an upper base 11 and a lower base 12), a winding member 2, and a mover member 3. The coil 21 is formed by winding an enameled wire on a coil framework and is arranged on a U-shaped iron core 22 to form a winding part 2, the elastic sheet assembly 31, the magnetic yoke 32, two pairs (4) of permanent magnets 33 and the output shaft 35 are arranged on a rotor support 34 to form a rotor part 3, the elastic sheet assembly 31 is rotatably sleeved in the support 1, and the output shaft 35 is fixedly connected with the elastic sheet assembly 31. After the assembly is completed, any one pair of permanent magnet magnetic pole faces 331 of the two pairs of permanent magnets 33 corresponds to the corresponding magnetic pole face 221 of the U-shaped iron core 22, an air gap (the distance between the permanent magnet magnetic pole faces 331 and the magnetic pole faces 221 of the U-shaped iron core in the front-back direction in fig. 1, namely the axial direction) is arranged between the permanent magnet magnetic pole faces and the magnetic pole faces, and the air gap value is 0.2-1 mm; the two U-shaped core magnetic pole faces 221 (see fig. 3 and 4) of the U-shaped core 22 are located at the middle position of the two pairs of permanent magnet magnetic pole faces 331, i.e. the north pole and the south pole of the two pairs of permanent magnets 33 are distributed up and down and left and right symmetrically with respect to the central axis of the mover part 3, the two U-shaped core magnetic pole faces 221 (one north pole and one south pole) are distributed up and down and left and right symmetrically with respect to the central axis of the mover part 3, and the axial center of any one U-shaped core magnetic pole face 221 is aligned with the axial center of the corresponding pair of permanent magnets 33.

The utility model discloses a theory of operation is: when alternating current is introduced into the coil 21, an alternating magnetic field is generated in the U-shaped iron core 22, so that the polarity of the magnetic pole of the U-shaped iron core 22 is changed alternately, the magnetic pole 221 of the U-shaped iron core and the fixed polarity magnetic pole of the permanent magnet 33 on the mover part 3 generate electromagnetic excitation acting forces with the same polarity repelling each other and the opposite polarity attracting each other, the alternating acting force is coupled with the rigidity of the elastic sheet 311 and the mass of the mover part 3 to generate resonance vibration, and therefore the shaft end of the output shaft 35 outputs circumferential swing and power to drive the toothbrush head to work (see fig. 3 and 4).

The rotor component 3 is rotatably sleeved in the support 1 through the elastic sheet assembly 31 and plays a supporting role, and after the rotor component is installed, any permanent magnet 33 corresponds to the magnetic pole face of the corresponding U-shaped iron core 22 (namely, the axial center of the permanent magnet 33 is overlapped with the axial center of the magnetic pole face of the corresponding U-shaped iron core 22); in addition, an elastic-mass mechanical resonance system is formed by the equivalent stiffness of the elastic sheet and the equivalent mass of the rotor part, and the set electromagnetic excitation acting force alternating frequency is the same as the inherent main frequency of the elastic-mass mechanical resonance system formed by the equivalent stiffness of the elastic sheet and the equivalent mass of the rotor part, so that the elastic-mass mechanical resonance system and the elastic-mass mechanical resonance system are beneficial to generating system resonance, the maximum oscillation amplitude and the minimum excitation power are obtained, and the power of the output shaft 35 is maximum, and the working efficiency is highest.

This electromagnetic vibration exciter's shell fragment 311 is moulded plastics with the material (the special case is plastics) the same with support 1 and is wrapped up and form fixed cover 312 before the shell fragment, fixed cover 313 in the shell fragment, fixed cover 314 behind the shell fragment, active cell part 3 passes through fixed cover 312 before the shell fragment, fixed cover 313 in the shell fragment, fixed cover 314 rotates the suit in support 1 behind the shell fragment, active cell part 3 has the round trip rotation space in support 1 and ensures that above-mentioned air gap is fixed unchangeable, increases the surface area of three stiff end, make it and support 1 within a definite time change the cooperation, guarantee better that system resonance is the high-efficient normal work of electromagnetic vibration exciter. The elastic sheet assembly 31 is arranged by adopting a structure similar to a torsion bar spring, has good linearity, is extremely beneficial to main frequency resonance, has large corresponding resonance amplitude and small loss, saves a bearing support mode, and reduces the product cost and the working noise; meanwhile, the structure is simple, the manufacturability is good, and the batch production is very convenient.

All simple variations and combinations of the technical features and technical solutions of the present application are considered to fall within the scope of the present application.

Claims

1. The utility model provides an electromagnetic exciter for electric toothbrush, characterized by only comprises support, winding part, active cell part assembly, winding part fixed mounting is in the support, active cell part rotates to be installed in the support, and active cell part includes shell fragment subassembly, two pairs of permanent magnets, yoke, output shaft, and shell fragment subassembly, two pairs of permanent magnets, yoke, output shaft are all installed on the active cell support, and shell fragment subassembly rotates the suit in the support, and two pairs of permanent magnets correspond the cooperation with a certain U type iron core magnetic pole of winding part respectively, shell fragment subassembly and output shaft fixed connection, have the air gap between permanent magnet magnetic pole face and the U type iron core magnetic pole face that corresponds.

2. The electromagnetic exciter for an electric toothbrush according to claim 1, wherein: the air gap is 0.2-1 mm.

3. The electromagnetic exciter for an electric toothbrush according to claim 1, wherein: two pairs of permanent magnets are distributed in a vertical and horizontal symmetrical mode relative to the central shaft of the rotor part, two magnetic pole faces of the U-shaped iron core are distributed in a vertical and horizontal symmetrical mode relative to the central shaft of the rotor part, and the axial center of any one magnetic pole face of the U-shaped iron core is overlapped with the axial centers of the corresponding pair of permanent magnets.

4. The electromagnetic exciter for an electric toothbrush according to claim 1, wherein: the elastic piece assembly is formed by fixedly connecting an elastic piece, a front elastic piece fixing sleeve, a middle elastic piece fixing sleeve and a rear elastic piece fixing sleeve, the front elastic piece fixing sleeve, the middle elastic piece fixing sleeve and the rear elastic piece fixing sleeve are respectively located at the front part, the middle part and the rear part of the elastic piece, and the front elastic piece fixing sleeve, the middle elastic piece fixing sleeve and the rear elastic piece fixing sleeve are respectively matched with the support.

5. The electromagnetic vibrator for an electric toothbrush according to claim 4, wherein: the support, the elastic sheet front fixing sleeve, the elastic sheet middle fixing sleeve and the elastic sheet rear fixing sleeve are all made of plastics.

6. An electromagnetic exciter for an electric toothbrush according to any one of claims 1 to 5, wherein: the support comprises upper bracket, undersetting, and the upper bracket passes through screw or buckle with the undersetting and is connected fixedly.