CN217469729U

CN217469729U - Injection molding type sound wave motor and electric toothbrush

Info

Publication number: CN217469729U
Application number: CN202221425614.0U
Authority: CN
Inventors: 林章敏; 陈彬
Original assignee: Shenzhen Chaowei System Technology Co ltd
Current assignee: Shenzhen Chaowei System Technology Co ltd
Priority date: 2022-06-08
Filing date: 2022-06-08
Publication date: 2022-09-20
Anticipated expiration: 2032-06-08

Abstract

The utility model discloses an injection molding type sound wave motor and electric toothbrush, including shell, coil and rotor subassembly, the coil is connected with the shell, and the rotor subassembly rotates in the shell, sets up a plurality of screens grooves that hold the coil on the shell, and the coil is located the screens inslot, coil and screens groove injection moulding, and the periphery side of rotor subassembly is located to a plurality of coil rings. The utility model provides a sound wave motor for the coil can be through the mode direct positioning who moulds plastics on the shell, need not set up the stator and be used for the wire winding, and the coil can be coiled in advance simultaneously, the setting in screens groove on the shell, the installation of rotor subassembly all can go on simultaneously respectively through three independent process, makes the motor that this scheme provided can form more perfect, more standardized automated production flow, improves production efficiency. Because the stator does not need to be arranged, the motor can not generate eddy current iron loss caused by silicon steel sheets in the traditional motor, the rotating efficiency of the motor is improved, and the energy loss is reduced.

Description

Injection molding type sound wave motor and electric toothbrush

Technical Field

The utility model belongs to sound wave motor field, in particular to type of moulding plastics sound wave motor and electric toothbrush.

Background

The sound wave motor is commonly used in the electric toothbrush, when the motor is powered on in a forward and reverse direction alternately with a certain frequency, the output shaft of the motor can do reciprocating back and forth rotation according to the frequency, for example, the clockwise rotation is 10 degrees and the anticlockwise rotation is 10 degrees, so that the 'brushing' action is really realized, the vibration principle does not generate mechanical friction in the motor, the stability is strong, and the output power is large.

In current sound wave motor, including shell, stator and rotor, the stator center is located to the rotor rotatory, and the stator setting is in the shell, for example, traditional sound wave motor for electric toothbrush, what mostly adopt is like the structure disclosed in the chinese utility model patent application that application number is 2019208486707, and this kind of structure need adopt the interior winding method with the coil coiling in the inside both sides of stator when production, installs in the shell at last, and this kind of traditional structure has following defect:

1. the stator adopts an internal winding method, and the sound wave motor is small in size and poor in internal operability, so that the difficulty of winding the coil is not increased.

2. The stator core of traditional sound wave motor all is piled up by the silicon steel sheet and forms, and the setting up of silicon steel sheet can produce the vortex iron loss, reduces motor efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model provides an injection molding type sound wave motor aims at solving the lower problem of motor efficiency is brought to coil coiling difficulty, silicon steel sheet stator core's iron loss among the current traditional sound wave motor.

According to the embodiment of the application, an injection molding type sound wave motor is provided, and comprises a shell, a coil and a rotor assembly, wherein the coil is connected with the shell, and the rotor assembly rotates in the shell; the shell is provided with a plurality of clamping grooves for accommodating coils, the coils are positioned in the clamping grooves, and the coils and the clamping grooves are subjected to injection molding; the plurality of coil loops are provided on an outer peripheral side of the rotor assembly.

Preferably, the rotor subassembly includes rotating tube, mounting bracket and magnet, two the mounting bracket branch is located the rotating tube both ends, two be fixed with magnet between the mounting bracket, the magnet symmetry set up in the both sides face of rotating tube.

Preferably, the magnet is a bar magnet.

Preferably, one end of the rotating pipe is connected with an output shaft, and the output shaft is inserted into the rotating pipe; the other end of the rotating pipe is connected with an elastic sheet, one end of the elastic sheet is inserted and positioned in the rotating pipe, the other end of the elastic sheet is connected with a silica gel cover, and the silica gel cover covers one end of the shell.

Preferably, a mounting groove is formed in the side face, close to one end of the output shaft, of the shell, a bearing is arranged in the mounting groove, and the output shaft is connected with the rotor assembly and is coaxially connected with the bearing.

Preferably, two sides of the magnet in the moving direction are divided into an N pole and an S pole, wherein a coil is arranged in the N pole direction, and a coil is arranged in the S pole direction.

Preferably, the coil is injection molded integrally with the housing.

The utility model also provides an electric toothbrush, its adoption as above-mentioned arbitrary type sound wave motor of moulding plastics.

Compared with the prior art, the utility model provides a pair of type of moulding plastics sound wave motor and electric toothbrush has following beneficial effect:

1. through setting up the shell, set up the screens groove on the shell, screens groove and coil injection moulding, make the coil can be through the mode direct positioning who moulds plastics on the shell, need not set up the stator and be used for the wire winding, can avoid setting up the stator among the prior art and at the inside wire-wound problem of stator, the coil can be coiled in advance simultaneously, the setting in screens groove on the shell, the installation of rotor subassembly all can go on simultaneously respectively through three independent process, it can to mould plastics fixedly during the installation, make the motor that this scheme provided can form more perfect, more standardized automated production flow, and the production efficiency is improved. Further, owing to need not set up the stator, the stator core is constituteed to the mode that the event need not adopt the silicon steel sheet to pile up for the sound wave motor of this application can not produce the vortex iron loss that brings because the silicon steel sheet among the traditional motor, improves the rotation efficiency of motor, reduces the energy loss. Furthermore, due to the injection molding mode, the coil can be directly fixed on the shell, and the insulation treatment of the coil can be completed in an injection molding mode, so that the process steps of motor production are reduced, and the production efficiency is improved.

2. Through setting up the mounting bracket on the rotating tube and come location magnet, the structure is established to the ring that cooperates the coil for the motor of this application can directly adopt the bar magnet of standard as the magnetite of rotor, need not carry out the customization to magnet and handle, can avoid setting up the arc magnetite of embedding rotor periphery side in the rotor of prior art, has reduced the cost of motor production.

3. Through setting up the shell fragment, the shell fragment both ends are fixed by rotating tube and silica gel lid respectively, and when the rotating tube work was rotated, the shell fragment was compelled to twist reverse, produced the gyroscopic force in the opposite direction for the rotating tube has more steady effect when reciprocating rotation.

4. Through with coil and the integrative injection moulding of shell for the shell can directly be fixed and insulation treatment with the coil when the shaping, has further reduced the step of motor production technology.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of an injection molding type acoustic wave motor according to a first embodiment of the present invention.

Fig. 2 is an exploded schematic view of an injection molding type acoustic wave motor according to a first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a rotor assembly in an injection molding type acoustic wave motor according to a first embodiment of the present invention.

Description of reference numerals:

1. a housing; 11. a clamping groove; 12. mounting grooves; 13. a bearing;

2. a coil;

3. a rotor assembly; 31. rotating the tube; 32. a mounting frame; 33. a magnet;

4. a spring plate; 5. a silica gel cover;

100. and an output shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

Please refer to fig. 1 and fig. 2, a first embodiment of the present invention discloses an injection molding type sound wave motor, which includes a housing 1, a coil 2 and a rotor assembly 3, wherein the coil 2 is connected to the housing 1, and the rotor assembly 3 rotates in the housing 1. The shell 1 is provided with a plurality of clamping grooves 11 for accommodating the coils 2, the coils 2 are positioned in the clamping grooves 11, and the coils 2 and the clamping grooves 11 are subjected to injection molding.

It is understood that the number of the coils 2 is plural, and a plurality of the coils 2 are circularly arranged on the outer peripheral side of the rotor assembly 3, specifically, the coils 2 are respectively arranged on both ends of the rotor assembly 3 in the rotating direction, so as to form a magnetic field transformation of the reciprocating motion to the rotor assembly 3.

The wound coil 2 can be directly injected into the clamping groove 11 on the shell 1 in an injection molding mode, namely the coil 2 is directly fixed through the structure of the clamping groove 11 on the shell 1 without the structure of a stator core in the prior art. Or, the coil 2 and the shell 1 are integrally injection-molded, and the wound coil 2 and the shell 1 are integrally injection-molded directly, in this embodiment, the shell 1 and the coil 2 are connected by injection molding, and are directly and integrally molded with the shell 1 by injection molding.

Specifically, please further refer to fig. 2 and fig. 3, the rotor assembly 3 includes a rotating tube 31, two mounting brackets 32 and magnets 33, the two mounting brackets 32 are respectively disposed at two ends of the rotating tube 31, a magnet 33 is fixed between the two mounting brackets 32, the magnets 33 are symmetrically disposed at two side surfaces of the rotating tube 31, the mounting brackets 32 at two ends of the rotating tube 31 position the magnets 33 at an outer side surface of the rotating tube 31, the magnets 33 are bar magnets, a rotating force is generated by the action of the magnets 33 and the coils 2 to drive the rotating tube 31 to rotate, and the rotating tube 31 is connected to the output shaft 100 to output rotation. The output shaft 100 is inserted into the rotating tube 31, and the rotating tube 31 is fixedly connected with the output shaft 100.

It can be understood that the two ends of the mounting frame 32 extend to two sides of the rotating tube 31, the extending portion has a fixing groove for mounting the magnet 33, and the two mounting frames 32 are fastened at two ends of the magnet 33 to fix the magnet.

It is understood that, in the present embodiment, the magnet 33 is a bar magnet, and the magnetic poles thereof are as shown in fig. 3, that is, two sides of the moving direction of the magnet 33 are divided into N pole and S pole, the N pole direction is provided with one coil 2, and the S pole direction is provided with one coil 2.

Referring to fig. 2, one end of the rotating tube 31, which is far away from the output shaft 100, is connected to a spring plate 4, one end of the spring plate 4 is inserted into the rotating tube 31, the other end is connected to a silicone cover 5, and the silicone cover 5 covers one end of the housing 1.

The position that the rotating tube 31 corresponds the shell fragment 4 is equipped with the fixed block, and the shell fragment 4 is pegged graft in the fixed block, and also the shell fragment 4 both ends are fixed by rotating tube 31 and silica gel lid 5 respectively, and when rotating tube 31 work was rotated, shell fragment 4 was forced to twist reverse, produced the gyroscopic force in opposite direction for rotating tube 31 has more steady effect when reciprocating rotation.

The side surface of the shell 1 close to one end of the output shaft 100 is provided with a mounting groove 12, a bearing 13 is arranged in the mounting groove 12, the output shaft 100 is connected with the rotor assembly 3 and is coaxially connected with the bearing 13, the output shaft 100 is positioned through the bearing 13, and a stable and silent rotating effect is provided.

The utility model discloses the second embodiment provides an electric toothbrush, and it adopts the type of moulding plastics sound wave motor that above-mentioned first embodiment provided, on pegging graft output shaft 100 through the toothbrush head with electric toothbrush, realizes automatic action of scrubbing.

4. Through with coil and the integrative injection moulding of shell for the shell can directly fix and insulating treatment with the coil when the shaping, has further reduced the step of motor production technology.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An injection molding type sound wave motor is characterized by comprising a shell, a coil and a rotor assembly, wherein the coil is connected with the shell, and the rotor assembly rotates in the shell;

the shell is provided with a plurality of clamping grooves for accommodating coils, the coils are positioned in the clamping grooves, and the coils and the clamping grooves are formed in an injection molding mode;

the plurality of coil loops are provided on an outer peripheral side of the rotor assembly.

2. The injection molded acoustic wave motor of claim 1, wherein: the rotor subassembly includes rotating-tube, mounting bracket and magnet, two the mounting bracket branch is located the rotating-tube both ends, two be fixed with magnet between the mounting bracket, the magnet symmetry set up in the both sides face of rotating-tube.

3. The injection molded acoustic wave motor of claim 2, wherein: the magnet is a bar magnet.

4. The injection molded acoustic wave motor of claim 2, wherein: one end of the rotating pipe is connected with an output shaft, and the output shaft is inserted into the rotating pipe;

the other end of the rotating pipe is connected with an elastic sheet, one end of the elastic sheet is inserted and positioned in the rotating pipe, the other end of the elastic sheet is connected with a silica gel cover, and the silica gel cover covers one end of the shell.

5. The injection-molded acoustic wave motor according to claim 1, wherein: the side surface of the shell, which is close to one end of the output shaft, is provided with a mounting groove, a bearing is arranged in the mounting groove, and the output shaft is connected with the rotor assembly and is coaxially connected with the bearing.

6. The injection molded acoustic wave motor of claim 2, wherein: the two sides of the magnet in the moving direction are divided into an N pole and an S pole, the N pole is provided with a coil, and the S pole is provided with a coil.

7. The injection molded acoustic wave motor of claim 1, wherein: the coil and the shell are integrally formed in an injection molding mode.

8. An electric toothbrush characterized by: use of a sonic motor according to any of claims 1-7 above.