Motor and electric toothbrush

Abstract

The motor comprises a rotor and a shell, the rotor penetrates through the interior of the shell, a magnet is arranged at the position, located in the shell, of the outer side of the rotor, an iron core is arranged outside the magnet in a sleeved mode, a Hall circuit board is installed on one end face of the iron core through a connecting assembly, and the Hall circuit board is arranged on the other end face of the iron core. A copper sleeve is arranged at the circle center of the Hall circuit board in a penetrating mode, and the rotor penetrates through the interior of the copper sleeve. According to the motor and the electric toothbrush, the Hall circuit board is arranged in the motor, when the electric toothbrush is produced and processed, three-phase lines of the motor can be automatically welded to the Hall circuit board, the lines do not need to penetrate out of the motor, the working procedure can be simplified, production automation is achieved, the Hall circuit board can be conveniently installed and fixed, and the production efficiency is improved. The stability of the Hall circuit board is ensured, and the steering direction of the Hall circuit board is adjusted by rotating the position of the annular plate, so that the welded three-phase lines are arranged in order, and the condition of disordered winding is avoided.

Description

Technical Field

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

[0002] An electric toothbrush is a battery- or power-driven toothbrush that helps clean teeth and gums through a rapidly vibrating or rotating brush head. Compared to traditional manual toothbrushes, electric toothbrushes provide more powerful cleaning effects and a more convenient user experience. The motor is a key component of an electric toothbrush.

[0003] The utility model with Chinese patent publication number CN219814387U discloses a motor assembly, a brush handle assembly of an electric toothbrush and an electric toothbrush, wherein the motor assembly includes: a motor body, the motor body is provided with an output shaft; a mounting seat, the mounting seat is provided with a connecting hole, the mounting seat is fixedly sleeved on the output shaft through the connecting hole to rotate with the output shaft; the mounting seat is provided with a mounting groove, the mounting groove is arranged on the peripheral side of the connecting hole; a position feedback member, the position feedback member is installed in the mounting groove to rotate with the output shaft; a position sensor, the position sensor is arranged at an interval with the mounting seat, and the fixed installation of the position feedback member on the output shaft is realized by the mounting seat, which can improve the installation stability of the position feedback member, thereby improving the detection effect of the position sensor on the position feedback member, so as to improve the control effect of the brush head assembly.

[0004] However, the Hall sensor mounting circuit board in the electric toothbrush is arranged outside the motor. This external circuit board structure requires the three-phase wires of the motor to be passed outside and then welded to the circuit board, and the threading action cannot be automated. Summary of the invention

[0005] The utility model provides a motor and an electric toothbrush, aiming to solve the problem that the existing Hall circuit board is arranged outside the motor, resulting in failure to realize automation.

[0006] According to an embodiment of the present application, a motor is provided, including a rotor and a casing, wherein the rotor passes through the interior of the casing, and a magnet is arranged on the outside of the rotor inside the casing, an iron core is arranged on the outside of the magnet, a Hall circuit board is installed on one end surface of the iron core through a connecting component, a copper sleeve is penetrated at the center of the Hall circuit board, and the rotor passes through the interior of the copper sleeve.

[0007] A circular through groove matched with the copper sleeve is arranged at the center of the Hall circuit board, and a plurality of slots are arranged at equal intervals at the outer edge of the Hall circuit board.

[0008] The connecting assembly includes an annular plate adapted to the end face of the iron core, and the side of the annular plate away from the iron core is equidistantly provided with extension strips with the same number as the slots, and the side of the extension strip away from the annular plate is provided with barbs, and the extension strips are adapted to the slots on the Hall circuit board so that each extension strip fits into each slot.

[0009] Preferably, a plurality of limit strips are provided on one side of the annular plate away from the iron core, and a rubber pad is provided on one end of the limit strip away from the annular plate. When the respective slots on the Hall circuit board are respectively clamped on the respective extension strips, the barb presses against the side of the Hall circuit board away from the rubber pad, and the rubber pad presses against the side of the Hall circuit board away from the barb.

[0010] Preferably, the extension strip is made of elastic material.

[0011] Preferably, an annular clamping plate is integrally formed on one side of the annular plate away from the extension strip, an annular groove matching the annular clamping plate is provided on one end face of the iron core close to the annular plate, and the annular clamping plate is arranged in the annular groove on the side away from the annular plate and is rotatably and slidably connected to the iron core.

[0012] Preferably, a flange arranged outward is provided on the side of the annular clamping plate away from the annular plate, an annular limiting groove matching the flange is provided on the inner wall of the annular groove, and the outer edge of the flange is arranged in the annular limiting groove and is rotationally and slidingly connected to the iron core.

[0013] Preferably, the outer side surface of the annular clamping plate is provided with a plurality of thread grooves equidistantly disposed between the annular plate and the flange, and the outer side surface of the iron core is screwed with positioning bolts corresponding to the thread grooves, and the positioning bolts are screwed into one of the thread grooves through threads.

[0014] Preferably, end covers are installed at both ends of the shell, and the two ends of the rotor pass through the inside of the two end covers respectively.

[0015] An electric toothbrush comprises a brush head and a motor, wherein the brush head is detachably mounted on a rotor of the motor.

[0016] Compared with the prior art, the motor and electric toothbrush provided by the utility model have the following beneficial effects:

[0017] 1. The motor and electric toothbrush, by setting the Hall circuit board inside the motor, can realize automatic welding of the three-phase wires of the motor to the Hall circuit board during the production and processing of the electric toothbrush, without passing the wires out of the motor, which can simplify the process and realize production automation.

[0018] 2. The motor and electric toothbrush can facilitate the installation and fixation of the Hall circuit board to ensure the stability of the Hall circuit board, and adjust the direction of the Hall circuit board by rotating the position of the annular plate, so that the welded three-phase lines are arranged neatly without entanglement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the exploded structure of the motor provided by the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the Hall circuit board in the motor provided by the utility model;

[0022] Figure 3 This is a schematic diagram of the installation of the Hall circuit board structure in the motor provided by the utility model;

[0023] Figure 4 for Figure 3 A partial enlarged schematic diagram of the structure at A in the middle;

[0024] Figure 5 This is a schematic diagram of the overall structure of the motor provided by the utility model.

[0025] Description of labels:

[0026] 1. Rotor; 2. Housing; 3. Magnet;

[0027] 4. iron core; 41. annular groove; 42. positioning bolt; 43. annular limiting groove;

[0028] 5. Connecting assembly; 51. Ring plate; 52. Extension strip; 53. Barb; 54. Limit strip; 55. Rubber pad; 56. Ring clamp; 57. Thread groove; 58. Flange;

[0029] 6. Hall circuit board; 61. circular through slot; 62. card slot; 7. copper sleeve; 8. end cover. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. 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.

[0031] It should also be understood that the terms used in this utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in this utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0032] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0033] See also Figure 1-5 , the utility model provides two technical solutions: Embodiment 1:

[0034] See also Figure 1 and Figure 5 In an embodiment of the utility model, a motor includes a rotor 1 and a housing 2. The rotor 1 passes through the interior of the housing 2, and a magnet 3 is arranged on the outside of the rotor 1 inside the housing 2. An iron core 4 is sleeved on the outside of the magnet 3. A Hall circuit board 6 is installed on one end surface of the iron core 4 through a connecting component 5. A copper sleeve 7 is penetrated at the center of the Hall circuit board 6, and the rotor 1 passes through the interior of the copper sleeve 7.

[0035] See also Figure 2 In the embodiment of the utility model, a circular through groove 61 adapted to the copper sleeve 7 is arranged at the center of the Hall circuit board 6, and a plurality of slots 62 are equidistantly arranged at the outer edge of the Hall circuit board 6. The Hall circuit board 6 is used to install the Hall sensor. When processing the motor, the three-phase wires of the motor are welded to the Hall circuit board 6 by automatic welding equipment. There is no need to thread the wires, and welding can be performed directly in the motor, thereby simplifying the automation process.

[0036] See also Figure 3In the embodiment of the utility model, the connecting component 5 includes an annular plate 51 adapted to the end face of the iron core 4, and the side of the annular plate 51 away from the iron core 4 is equidistantly provided with extension strips 52 with the same number as the slots 62, and the side of the extension strips 52 away from the annular plate 51 is provided with barbs 53, and the extension strips 52 are adapted to the slots 62 on the Hall circuit board 6, so that each extension strip 52 is just stuck into each slot 62.

[0037] In the above scheme: each extension strip 52 is sequentially inserted into the corresponding slot 62 on the Hall circuit board 6, and the barb 53 on the extension strip 52 presses against one side of the Hall circuit board 6, and then the rubber pad 55 at one end of the limit strip 54 presses against the other side of the Hall circuit board 6, which plays a role in positioning and fixing the Hall circuit board 6, thereby ensuring the stability of the installation of the Hall circuit board 6.

[0038] For further information, see Figure 3 In the embodiment of the utility model, a plurality of limit strips 54 are further provided on the side of the annular plate 51 away from the iron core 4, and a rubber pad 55 is provided on the end of the limit strip 54 away from the annular plate 51. When the respective slots 62 on the Hall circuit board 6 are respectively clamped on the respective extension strips 52, the barbs 53 press against the side of the Hall circuit board 6 away from the rubber pad 55, and the rubber pad 55 presses against the side of the Hall circuit board 6 away from the barbs 53, so that after the Hall circuit board 6 is installed, the stability of the installation of the Hall circuit board 6 is guaranteed.

[0039] For further information, see Figure 3 In the embodiment of the utility model, the extension strips 52 are made of elastic material. By utilizing the elasticity of the extension strips 52 , each extension strip 52 can be respectively snapped into the snap slots 62 on the Hall circuit board 6 .

[0040] The second embodiment is different from the first embodiment in that:

[0041] See also Figure 4 In the embodiment of the utility model, an annular clamping plate 56 is integrally formed on one side of the annular plate 51 away from the extension strip 52, and an annular groove 41 adapted to the annular clamping plate 56 is provided on one end surface of the iron core 4 close to the annular plate 51. The side of the annular clamping plate 56 away from the annular plate 51 is arranged in the annular groove 41 and is rotatably and slidingly connected with the iron core 4.

[0042] In the above scheme: when it is necessary to adjust the position of the Hall sensor on the Hall circuit board 6, the positioning bolt 42 is removed by a screwdriver, and then the annular plate 51 is rotated to make the annular clamping plate 56 rotate in the annular groove 41 on the iron core 4, thereby driving the Hall circuit board 6 to rotate and adjust the position of the Hall sensor on the Hall circuit board 6. In this way, when welding the three-phase wires of the motor, the three-phase wires can be arranged neatly without any clutter.

[0043] For further information, see Figure 4 In the embodiment of the utility model, a flange 58 arranged outward is provided on the side of the annular clamping plate 56 away from the annular plate 51, and an annular limiting groove 43 matched with the flange 58 is provided on the inner wall of the annular groove 41. The outer edge of the flange 58 is arranged in the annular limiting groove 43 and is rotatably and slidably connected with the iron core 4. When the annular clamping plate 56 rotates in the annular groove 41 on the iron core 4, the flange 58 on the annular clamping plate 56 will slide in the annular limiting groove 43, which plays a role of limiting the annular clamping plate 56 and preventing the annular clamping plate 56 from falling off the annular groove 41.

[0044] For further information, see Figure 4 In the embodiment of the utility model, a plurality of thread grooves 57 are equidistantly arranged on the outer side of the annular clamping plate 56 between the annular plate 51 and the flange 58, and a positioning bolt 42 corresponding to the thread groove 57 is screwed into the outer side of the iron core 4, and the positioning bolt 42 is screwed into one of the thread grooves 57 through a thread. When the Hall sensor on the Hall circuit board 6 is adjusted to the required direction, the positioning bolt 42 is installed in the corresponding thread groove 57 on the outer side of the annular clamping plate 56, which fixes the annular clamping plate 56 and prevents the Hall circuit board 6 from being displaced.

[0045] For further information, see Figure 4 In the embodiment of the utility model, end covers 8 are installed at both ends of the housing 2, and the two ends of the rotor 1 pass through the interior of the two end covers 8 respectively. The arrangement of the end covers 8 plays a role in dustproof and waterproofing the components inside the motor.

[0046] An electric toothbrush comprises a brush head and a motor. The brush head is detachably mounted on a rotor 1 of the motor.

[0047] Working principle: Each extension bar 52 is sequentially inserted into the corresponding slot 62 on the Hall circuit board 6, and the barb 53 on the extension bar 52 presses against one side of the Hall circuit board 6, and then the rubber pad 55 at one end of the limit bar 54 presses against the other side of the Hall circuit board 6, so as to position and fix the Hall circuit board 6 and ensure the stability of the installation of the Hall circuit board 6;

[0048] When it is necessary to adjust the position of the Hall sensor on the Hall circuit board 6, remove the positioning bolt 42 with a screwdriver, and then rotate the annular plate 51 to make the annular clamping plate 56 rotate in the annular groove 41 on the iron core 4, thereby driving the Hall circuit board 6 to rotate and adjust the position of the Hall sensor on the Hall circuit board 6. In this way, when welding the three-phase wires of the motor, the three-phase wires can be arranged neatly without any clutter. After adjustment, install the positioning bolt 42 into the corresponding threaded groove 57 on the outer side of the annular clamping plate 56.

[0049] Compared with the prior art, the motor and electric toothbrush provided by the utility model have the following beneficial effects:

[0050] 1. The motor and electric toothbrush, by setting the Hall circuit board inside the motor, can realize automatic welding of the three-phase wires of the motor to the Hall circuit board during the production and processing of the electric toothbrush, without passing the wires out of the motor, which can simplify the process and realize production automation.

[0051] 2. The motor and electric toothbrush can facilitate the installation and fixation of the Hall circuit board to ensure the stability of the Hall circuit board, and adjust the direction of the Hall circuit board by rotating the position of the annular plate, so that the welded three-phase lines are arranged neatly without entanglement.

[0052] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A motor, comprising a rotor (1) and a housing (2), wherein the rotor (1) passes through the interior of the housing (2), and a magnet (3) is arranged on the outer side of the rotor (1) and located inside the housing (2), and an iron core (4) is arranged on the outer side of the magnet (3), wherein: A Hall circuit board (6) is mounted on one end surface of the iron core (4) via a connecting assembly (5); a copper sleeve (7) is provided through the center of the Hall circuit board (6); and the rotor (1) passes through the interior of the copper sleeve (7); A circular through groove (61) adapted to the copper sleeve (7) is provided at the center of the Hall circuit board (6), and a plurality of slots (62) are equidistantly provided at the outer edge of the Hall circuit board (6); The connection assembly (5) comprises an annular plate (51) adapted to match the end surface of the iron core (4); a side of the annular plate (51) away from the iron core (4) is provided with extension bars (52) of the same number as the slots (62) at equal distances; a side of the extension bars (52) away from the annular plate (51) is provided with barbs (53); and the extension bars (52) are adapted to match the slots (62) on the Hall circuit board (6), so that each extension bar (52) fits exactly into each slot (62).

2. A motor according to claim 1, characterized in that: A plurality of limit strips (54) are further provided on a side of the annular plate (51) away from the iron core (4), and a rubber pad (55) is provided on one end of the limit strip (54) away from the annular plate (51). When each of the slots (62) on the Hall circuit board (6) is respectively engaged with each of the extension strips (52), the barb (53) presses against the side of the Hall circuit board (6) away from the rubber pad (55), and the rubber pad (55) presses against the side of the Hall circuit board (6) away from the barb (53).

3. A motor according to claim 1, characterized in that: The extension strip (52) is made of elastic material.

4. The motor according to claim 1, characterized in that: An annular clamping plate (56) is integrally formed on one side of the annular plate (51) away from the extension strip (52); an annular groove (41) matching the annular clamping plate (56) is provided on one end face of the iron core (4) close to the annular plate (51); and a side of the annular clamping plate (56) away from the annular plate (51) is arranged in the annular groove (41) and is rotatably and slidably connected to the iron core (4).

5. A motor according to claim 4, characterized in that: A flange (58) arranged outward is provided on one side of the annular clamping plate (56) away from the annular plate (51); an annular limiting groove (43) matching the flange (58) is provided on the inner wall of the annular groove (41); an outer edge of the flange (58) is arranged in the annular limiting groove (43) and is rotatably and slidably connected to the iron core (4).

6. A motor according to claim 5, characterized in that: The outer side surface of the annular clamping plate (56) is provided with a plurality of thread grooves (57) at equal intervals at a position between the annular plate (51) and the flange (58), and the outer side surface of the iron core (4) is screwed with a positioning bolt (42) corresponding to the thread groove (57), and the positioning bolt (42) is screwed into one of the thread grooves (57) through a thread.

7. The motor according to claim 1, characterized in that: End covers (8) are installed at both ends of the housing (2), and the two ends of the rotor (1) pass through the interior of the two end covers (8) respectively.

8. An electric toothbrush, characterized in that: It comprises a brush head and a motor according to any one of claims 1 to 7, wherein the brush head is detachably mounted on a rotor (1) of the motor.

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