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CN-224233411-U - Acoustic wave motor and electric toothbrush

CN224233411UCN 224233411 UCN224233411 UCN 224233411UCN-224233411-U

Abstract

The utility model provides an acoustic wave motor which comprises a shell, an end cover, a rotor assembly, a spring piece and a magnet, wherein a gap for clamping the magnet is formed between the first limiting protrusion and the spring piece, so that the magnet can be fixed in the shell. Therefore, the utility model can avoid the use of the stator yoke, and fundamentally saves the cost of raw materials required by the stator yoke.

Inventors

  • LI JINGBO
  • WANG LONG
  • CHEN YANPING

Assignees

  • 深圳市精锐昌精密智能有限公司

Dates

Publication Date
20260512
Application Date
20250429

Claims (10)

  1. 1. The sound wave motor is characterized by comprising a machine shell (1), an end cover (2), a rotor assembly (3), a spring piece (4) and a magnet (5), wherein the machine shell (1) comprises a plane part (11) and an arc part (12) which are mutually adjacent, two first limiting protrusions (13) are convexly arranged on the arc part (12), the two first limiting protrusions (13) are symmetrically arranged, the spring piece (4) is detachably arranged on the plane part (11), a gap for clamping the magnet (5) is formed between the first limiting protrusions (13) and the spring piece (4), the rotor assembly (3) is arranged between a plurality of the magnets (5) in a penetrating mode, one end of the rotor assembly extends out of the machine shell (1), the other end of the rotor assembly is connected with the end cover (2), and the end cover (2) is used for covering the machine shell (1).
  2. 2. The acoustic wave motor according to claim 1, wherein the first limit protrusion (13) is of an arc-shaped structure and is formed by recessing the casing (1) from outside to inside.
  3. 3. The acoustic wave motor according to claim 1, wherein the spring piece (4) comprises a connecting portion (41) and two pressing portions (42), the two pressing portions (42) are arranged on two sides of the connecting portion (41), the connecting portion (41) is of a flat plate structure, the pressing portions (42) are of arc-shaped structures, the pressing portions (42) are of elastic structures, the connecting portion (41) is abutted to the plane portion (11), and a gap for clamping the magnet (5) is formed between the pressing portions (42) and the spring piece (4).
  4. 4. The acoustic wave motor according to claim 1, wherein the arc-shaped portion (12) is provided with a second limit protrusion (14) in a protruding manner, and the second limit protrusion (14) is adapted to abut against an end portion of the magnet (5).
  5. 5. The acoustic wave motor according to claim 4, wherein the second limiting protrusion (14) is of an arc-shaped structure and is formed by recessing the casing (1) from outside to inside.
  6. 6. The acoustic wave motor according to claim 1, wherein the rotor assembly (3) comprises a shaft (31), a winding (32), an iron core (33) and a lead wire (34), the iron core (33) is sleeved on the shaft (31), the winding (32) is wound on the iron core (33), the lead wire (34) is connected with the winding (32), one end of the shaft (31) extends out of the casing (1), and the other end of the shaft is connected with the end cover (2).
  7. 7. The acoustic wave motor according to claim 6, wherein a first bearing (31) is provided between the peripheral side of the shaft (31) and the casing (1), and a second bearing (31) is provided between the end of the shaft (31) and the end cap (2).
  8. 8. The acoustic wave motor according to claim 6, wherein the end cap (2) is provided with a through hole (21) through which the lead wire (34) passes.
  9. 9. The acoustic motor according to claim 6, wherein the shaft (31) is provided with a felt (8).
  10. 10. An electric toothbrush comprising the sonic motor of any one of claims 1-9.

Description

Acoustic wave motor and electric toothbrush Technical Field The utility model relates to the technical field of vibration motors, in particular to an acoustic wave motor and an electric toothbrush. Background The electric toothbrush uses the vibration motor to generate high-frequency vibration, can penetrate into tooth gaps and tooth surfaces, effectively removes dental plaque and food residues, and improves cleaning efficiency. In the conventional art, as shown in fig. 5, a rotor assembly 3 of a conventional vibration motor is interposed between two pairs of magnets, the magnets 5 are embedded in a stator yoke 9, and the magnetic flux center of the rotor assembly 3 swings back and forth between the magnetic flux centers of the two pairs of magnets 5 by means of alternating magnetic fields generated when winding coils are energized and the mutual alternate attraction of the two pairs of magnets 5. The stator yoke 9 is manufactured by using a raw material such as plastic in a conventional structure, which increases the material cost. Disclosure of utility model Accordingly, the present utility model is directed to an acoustic motor, which solves the problem that the stator yoke in the prior art needs plastic or other raw materials to be manufactured in the conventional structure, and increases the material cost. The utility model provides an acoustic wave motor, which comprises a casing, an end cover, a rotor assembly, a spring piece and magnets, wherein the casing comprises a plane part and an arc part which are mutually adjacent, the plane part and the arc part are both provided with two first limit protrusions, the arc part is convexly provided with two first limit protrusions, the two first limit protrusions are symmetrically arranged, the spring piece is detachably arranged on the plane part, a gap for clamping the magnets is formed between the first limit protrusions and the spring piece, the rotor assembly is arranged among a plurality of magnets in a penetrating way, one end of the rotor assembly extends out of the casing, the other end of the rotor assembly is connected with the end cover, and the end cover is used for covering the casing. Further, the first limiting protrusion is of an arc-shaped structure and is formed by the fact that the shell is recessed from outside to inside. Further, the spring piece includes connecting portion and two extrusion portions, two extrusion portions are located the both sides of connecting portion, connecting portion is flat plate structure, extrusion portion is arc structure, extrusion portion is elastic structure, connecting portion with plane portion butt, extrusion portion with form between the spring piece and be used for the joint the clearance of magnet. Further, the arc-shaped part is convexly provided with a second limiting protrusion, and the second limiting protrusion is used for being abutted with the end part of the magnet. Further, the second limiting protrusion is of an arc-shaped structure and is formed by the fact that the shell is recessed from outside to inside. Further, the rotor assembly comprises a shaft, a winding, an iron core and a lead, wherein the iron core is sleeved on the shaft, the winding is wound on the iron core, the lead is connected with the winding, one end of the shaft extends out of the casing, and the other end of the shaft is connected with the end cover. Further, a first bearing is provided between the housing and the peripheral side of the shaft, and a second bearing is provided between the end of the shaft and the end cap. Further, the end cover is provided with a through hole through which the lead wire can pass. Further, a felt is sleeved on the shaft. The utility model also provides an electric toothbrush comprising the acoustic wave motor as described in any one of the above. The utility model has the beneficial effects that the sound wave motor comprises a shell, an end cover, a rotor assembly, a spring piece and a magnet, wherein a gap for clamping the magnet is formed between the first limiting protrusion and the spring piece, so that the magnet can be fixed in the shell. Therefore, the utility model can avoid the use of the stator yoke, and fundamentally saves the cost of raw materials required by the stator yoke. Drawings FIG. 1 is a schematic diagram of an acoustic wave motor according to the present utility model; FIG. 2 is a schematic diagram of the internal structure of the acoustic wave motor according to the present utility model; FIG. 3 is a schematic view of a rotor assembly mounted within a housing; FIG. 4 is a schematic view of the structure within the housing; fig. 5 is a schematic structural view of a prior art vibration motor. In the figure, 1, a shell, 11, a plane part, 12, an arc part, 13, a first limit protrusion, 14, a second limit protrusion, 2, an end cover, 21, a through hole, 3, a rotor assembly, 31, a shaft, 32, a winding, 33, an iron core, 34, a lead wire, 4, a spring piece, 41, a connect