Vibration motor of electric toothbrush

Abstract

The utility model provides a vibration motor of an electric toothbrush, which comprises a shell and a rotor assembly, and the rotor assembly comprises a magnet mounting frame, a magnet, a motor, a motor, a motor and a motor, the magnet is mounted in the mounting groove, and two magnetic poles of the magnet respectively face the upper opening and the lower opening of the mounting groove; the two magnetic conductive plates are installed on the upper side and the lower side of the magnet installation frame through clamping structures respectively and abut against the upper face and the lower face of the magnet, and the clamping structures comprise clamping grooves formed in the two sides of the magnetic conductive plates and clamping blocks arranged on the magnet installation frame and clamped with the clamping grooves in a matched mode; one end of the driving shaft is connected with the magnet mounting frame, and the other end extends out of the shell. Compared with the prior art that the magnet needs to be installed through glue and is easy to separate, the assembly is quicker and more convenient, and the reliability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a vibration motor of an electric toothbrush. Background Art

[0002] As people's quality of life improves, they pay more and more attention to oral health, and electric toothbrushes are increasingly entering family life.

[0003] At present, electric toothbrushes use vibration motors to drive the brush head. Figure 7 As shown, the rotor assembly of the vibration motor includes a drive shaft 03, a first magnet 01, a second magnet 02 and two magnetic conductive plates 04, the two magnetic conductive plates 04 are respectively arranged on the upper and lower sides of the drive shaft 03, the first magnet 01 and the second magnet 02 are respectively arranged on the left and right sides of the drive shaft 03, the first magnet 01 and the second magnet 02 have the same polarity of the magnetic conductive plates 04 facing the same side, so that the N pole of the first magnet 01 will repel the N pole of the second magnet 02, and the S pole of the first magnet 01 will repel the S pole of the second magnet 02, resulting in the first magnet 01 and the second magnet 02 needing to be fixed to the drive shaft 03 by glue, so the assembly is more complicated, and the magnets may also be separated from the drive shaft after long-term use, reducing reliability. Utility Model Content

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the prior art that the installation of the magnet and the drive shaft is relatively complicated, thereby providing a vibration motor for an electric toothbrush that is quick and convenient to install and has high reliability.

[0005] To this end, the utility model provides a vibration motor for an electric toothbrush, comprising a shell and a rotor assembly, the rotor assembly comprising: a magnet mounting frame, mounted inside the shell and having a mounting slot disposed in the middle thereof; a magnet, mounted in the mounting slot, with the two magnetic poles of the magnet respectively facing the upper opening and the lower opening of the mounting slot; two magnetic conductive plates, respectively mounted on the upper and lower sides of the magnet mounting frame through a clamping structure, and abutting against the upper and lower surfaces of the magnet, the clamping structure comprising clamping slots disposed on both sides of the magnetic conductive plates, and clamping blocks disposed on the magnet mounting frame and adapted to clamp with the clamping slots; a drive shaft, one end of which is connected to the magnet mounting frame, and the other end of which extends out of the shell.

[0006] A first slot is provided at one end of the magnet mounting frame in the length direction, and an insert block adapted to be inserted into the first slot is provided at the end of the driving shaft.

[0007] The insert block is bonded to the first slot by glue.

[0008] A stator assembly is arranged in the shell, and the stator assembly comprises an iron core and a coil frame installed on both sides of the iron core in the length direction, and a coil is wound on the coil frame.

[0009] The iron core is in the shape of a hollow column, and the inner wall of the hollow columnar iron core is formed with two first arms that are oppositely arranged and in a Y shape. The coil frame is formed with a second arm that is arranged corresponding to the first arm, and the second arm is formed with a second slot for the first arm to be inserted into, and the second arm is used to wind the coil.

[0010] A limiting structure for limiting the rotational position of the driving shaft is provided between the driving shaft and the shell, and the limiting structure includes: a first limiting plate, which is fixed on the driving shaft and has a protrusion provided on its outer wall; a second limiting plate, which is fixed inside the shell and has a through hole in the middle for installing the first limiting plate, and the inner wall of the through hole has two stoppers that can resist the protrusion.

[0011] The technical solution of this utility model has the following advantages:

[0012] 1. The vibration motor of the electric toothbrush provided by the utility model comprises a rotor assembly including a magnet mounting frame, a magnet, two magnetic conductive plates and a driving shaft. The magnet mounting frame has a mounting groove arranged in the middle thereof. The magnet is mounted in the mounting groove, and the two magnetic poles of the magnet are respectively oriented toward the upper opening and the lower opening of the mounting groove. The two magnetic conductive plates are respectively mounted on the upper and lower sides of the magnet mounting frame through a clamping structure, and abut against the upper and lower surfaces of the magnet. The clamping structure comprises clamping grooves arranged on both sides of the magnetic conductive plates, and clamping blocks arranged on the magnet mounting frame and adapted to clamp with the clamping grooves. Compared with the prior art method in which the magnet needs to be mounted by glue and the magnet is easy to separate, this method of assembly is faster and more convenient, and reliability is guaranteed.

[0013] 2. The vibration motor of the electric toothbrush provided by the utility model has a first slot at one end of the magnet mounting frame in the length direction, and an insert block adapted to be plugged into the first slot is provided at the end of the driving shaft, which has the advantages of simple structure and quick and convenient assembly.

[0014] 3. The vibration motor of the electric toothbrush provided by the utility model has an iron core in the shape of a hollow column. The inner wall of the hollow columnar iron core is formed with two first arms that are oppositely arranged and in a Y shape. The coil frame is formed with a second arm that is arranged corresponding to the first arm. The second arm is formed with a second slot for the first arm to be inserted into, so that the coil frame and the iron core are easy to assemble.

[0015] The vibration motor of the electric toothbrush provided by the utility model has a limiting structure comprising: a first limiting plate, which is fixed on the driving shaft and has a protrusion arranged on its outer wall; a second limiting plate, which is fixed to the middle part of the cavity and has a through hole in the middle part for installing the first limiting plate, and the inner wall of the through hole has two stoppers that can resist the protrusion, thereby limiting the rotation position of the driving shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 is a cross-sectional view of the vibration motor of the utility model;

[0018] Figure 2 is a three-dimensional diagram of a rotor assembly;

[0019] Figure 3 It is a schematic diagram of the exploded structure of the rotor assembly;

[0020] Figure 4 is a three-dimensional diagram of a stator assembly;

[0021] Figure 5 It is a schematic diagram of the exploded structure of the stator assembly;

[0022] Figure 6 It is a structural schematic diagram of the limiting structure;

[0023] Figure 7 It is a schematic diagram of the structure of a rotor assembly in the prior art.

[0024] Explanation of the reference numerals: 01, first magnet; 02, second magnet; 03, drive shaft; 04, magnetic conductive plate; 1, housing; 2, magnet mounting bracket; 3, mounting slot; 4, magnet; 5, magnetic conductive plate; 6, card slot; 7, card block; 8, drive shaft; 9, first slot; 10, plug block; 11, iron core; 12, coil frame; 13, first arm; 14, second arm; 15, second slot; 16, first limit plate; 17, protrusion; 18, second limit plate; 19, block; 20, coil. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] Example

[0030] This embodiment provides a vibration motor for an electric toothbrush, such as Figure 1 As shown, it includes a housing 1, a rotor assembly and a stator assembly.

[0031] Rotor components, such as Figure 1 As shown, it includes a magnet mounting frame 2, a magnet 4, a magnetic conductive plate 5 and a driving shaft 8. Figure 2 and Figure 3As shown, the magnet mounting frame 2 is installed inside the shell 1, and has a mounting groove 3 arranged in the middle thereof, and the mounting groove 3 has an upper opening and a lower opening. The magnet 4 is installed in the mounting groove 3, and the two magnetic poles of the magnet 4 are respectively facing the upper opening and the lower opening of the mounting groove 3. Two magnetic conductive plates 5 are respectively installed on the upper and lower sides of the magnet mounting frame 2 through a clamping structure, and abut against the upper and lower surfaces of the magnet 4. The clamping structure includes a clamping groove 6 arranged on both sides of the magnetic conductive plate 5, and a clamping block 7 arranged on the magnet mounting frame 2 and adapted to be clamped with the clamping groove 6. A drive shaft 8 is connected to the magnet mounting frame 2 at one end, and extends out of the shell 1 at the other end. In this embodiment, a first slot 9 is provided at one end of the magnet mounting frame 2 in the length direction, and an insert block 10 adapted to be plugged with the first slot 9 is provided at the end of the drive shaft 8, and the insert block 10 is bonded to the first slot 9 by glue. A limiting structure for limiting the rotation position of the drive shaft 8 is provided between the drive shaft 8 and the shell 1, as shown in FIG. Figure 6 As shown, the limiting structure includes: a first limiting plate 16, fixed on the driving shaft 8, and having a protrusion 17 arranged on its outer wall; a second limiting plate 18, fixed inside the shell 1, and having a through hole in the middle for installing the first limiting plate 16, and the inner wall of the through hole has two stoppers 19 that can resist the protrusion 17.

[0032] The stator assembly is arranged inside the housing 1, such as Figure 4 and Figure 5 As shown, the stator assembly includes an iron core 11 and a coil frame 12 installed on both sides of the iron core 11 in the length direction, and the coil frame 12 is wound with a coil 20. The iron core 11 is a hollow column, and the inner wall of the hollow columnar iron core 11 is formed with two first arms 13 that are oppositely arranged and in a Y shape, and the coil frame 12 is formed with a second arm 14 that is arranged corresponding to the first arm 13, and the second arm 14 is formed with a second slot 15 for the first arm 13 to be inserted, and the second arm 14 is used to wind the coil 20.

[0033] The vibration motor of the electric toothbrush provided by the utility model has two magnetic conductive plates 5 respectively mounted on the upper and lower sides of the magnet mounting frame 2 through a clamping structure, and abutting against the upper and lower surfaces of the magnet 4. The clamping structure includes clamping grooves 6 arranged on both sides of the magnetic conductive plates 5, and clamping blocks 7 arranged on the magnet mounting frame 2 and adapted to be clamped with the clamping grooves 6. Compared with the prior art method in which the magnets need to be installed by glue and the magnets are easy to separate, this method of assembly is faster and more convenient, and reliability is guaranteed.

[0034] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A vibration motor for an electric toothbrush, comprising a housing (1) and a rotor assembly, characterized in that: The rotor assembly comprises: A magnet mounting frame (2) is mounted inside the housing (1) and has a mounting groove (3) disposed in the middle thereof; A magnet (4) is installed in the installation groove (3), and two magnetic poles of the magnet (4) are respectively facing the upper opening and the lower opening of the installation groove (3); Two magnetic conductive plates (5) are respectively mounted on the upper and lower sides of the magnet mounting frame (2) through a clamping structure, and are in contact with the upper and lower surfaces of the magnet (4); the clamping structure comprises clamping grooves (6) provided on both sides of the magnetic conductive plates (5), and clamping blocks (7) provided on the magnet mounting frame (2) and adapted to be clamped with the clamping grooves (6); A driving shaft (8) has one end connected to the magnet mounting frame (2) and the other end extending out of the housing (1).

2. The vibration motor of the electric toothbrush according to claim 1, characterized in that: A first slot (9) is provided at one end of the magnet mounting frame (2) in the length direction, and an insert block (10) adapted to be inserted into the first slot (9) is provided at the end of the driving shaft (8).

3. The vibration motor of the electric toothbrush according to claim 2, characterized in that: The insert block (10) is bonded to the first slot (9) by glue.

4. The vibration motor of the electric toothbrush according to claim 1, characterized in that: A stator assembly is arranged in the housing (1), the stator assembly comprising an iron core (11) and a coil frame (12) mounted on both sides of the iron core (11) in the length direction, and a coil (20) is wound on the coil frame (12).

5. The vibration motor of the electric toothbrush according to claim 4, characterized in that: The iron core (11) is in the shape of a hollow column, and the inner wall of the hollow columnar iron core (11) is formed with two first arms (13) arranged opposite to each other and in a Y shape, the coil frame (12) is formed with a second arm (14) arranged corresponding to the first arm (13), the second arm (14) is formed with a second slot (15) for the first arm (13) to be inserted, and the second arm (14) is used for winding the coil (20).

6. The vibration motor of the electric toothbrush according to claim 1, characterized in that: A limiting structure for limiting the rotational position of the driving shaft (8) is provided between the driving shaft (8) and the housing (1), the limiting structure comprising: A first limiting plate (16) is fixed on the driving shaft (8) and has a protrusion (17) arranged on its outer wall; The second limiting plate (18) is fixed inside the housing (1) and has a through hole in the middle thereof for mounting the first limiting plate (16), and the inner wall of the through hole has two stoppers (19) that can abut against the protrusion (17).

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