Sweeping, vibrating and brushing integrated electric toothbrush motor

Abstract

The invention provides a sweeping, vibrating and brushing integrated electric toothbrush motor which comprises a rear shell, a middle shell and a front shell, the front shell and the rear shell are connected to the front end and the rear end of the middle shell respectively, so that a cavity is defined by the interior of the rear shell, the interior of the middle shell and the interior of the front shell, the cavity is internally provided with three parts, namely a rear middle part and a front part, and the rear part and the front part are connected to the two ends of the middle part respectively; compared with a common toothbrush motor, through cooperation of the first transmission shaft, the second transmission shaft, the first winding, the second winding, the first winding silicon steel sheet, the first magnet and the like and the first winding, the motor can generate vibration, sector sweeping and axial movement, the motor is easier and more direct to control compared with a motor which utilizes Hall to adjust sector sweeping amplitude, more cost can be saved, and the motor is more suitable for popularization and application. And the first winding is arranged at the tail part of the vibration and sweeping part and is directly electrified, so that sparks cannot be generated during commutation, and higher safety is realized.

Description

Technical Field

[0001] This invention relates to the field of electric toothbrush technology, and in particular to an electric toothbrush motor that integrates sweeping and vibrating brushing. Background Technology

[0002] A toothbrush is a tool used to clean teeth. Traditional toothbrushes typically have soft bristles at the tip of the handle, and people brush their teeth by holding the handle and swinging their arms. This type of toothbrush is inexpensive and widely used.

[0003] To improve brushing effectiveness, electric toothbrushes were invented. Current electric toothbrushes primarily use motors that vibrate, or a combination of vibration and fan-shaped sweeping motions. Vibration motors can be either a standard motor with an eccentric wheel or a rotor-based system. Motors that combine vibration and fan-shaped sweeping motions use a standard motor with an eccentric wheel, and employ Hall effect sensors to control the motor's rotation angle to achieve the combined vibration and fan-shaped sweeping effect. Electric toothbrushes using vibration motors only perform point-to-point movements, resulting in poor cleaning. In contrast, electric toothbrushes using a combination of vibration and fan-shaped sweeping motions only sweep in one direction on the teeth during use, providing slightly better cleaning than simple vibration toothbrushes. Both types of electric toothbrushes, using different motors, can only clean a small area of ​​the teeth. Summary of the Invention

[0004] In view of this, in order to enable electric toothbrushes to clean teeth more effectively and efficiently over a large area during use, the present invention proposes an integrated sweeping and vibrating electric toothbrush motor, the specific technical solution of which is as follows:

[0005] An electric toothbrush motor integrating sweeping and vibrating brushing includes a rear shell, a middle shell, and a front shell. The front and rear ends of the middle shell are respectively connected to the front and rear shells, forming a cavity inside the rear, middle, and front shells. The cavity is divided into three parts: a rear part, a middle part, and a front part. The two ends of the middle part are respectively connected to the rear part and the front part. The rear part includes a first winding, a first winding support, and a first winding silicon steel sheet. The first winding is wound on the first winding support, and the first winding support is fixed on the first winding silicon steel sheet.

[0006] The middle part includes a first drive shaft, a second winding, a first magnet, a first bearing, and a second bearing. The first drive shaft is provided with a first magnet, and the two ends of the first drive shaft are provided with a second bearing and a first bearing. The second bearing is located in a small hole opened in the middle support.

[0007] The front part includes a second drive shaft, a second magnet, and a second winding support. The first drive shaft extends from one end of the middle shell, and the second winding is wound around the second winding support and fixed together with the first drive shaft at the center of the front end of the middle shell. The leads at both ends of the second winding extend from the opening of the middle shell.

[0008] Furthermore, the second drive shaft is a metal part with one end larger than the other. The second magnet is fixed at the larger end, and the smaller end passes through the front shell with a bushing.

[0009] Furthermore, the first winding is located at one end of the cavity near the rear shell, and the two short leads of the first winding extend out from the rear shell to facilitate later connection.

[0010] Furthermore, one end of the first drive shaft is a polyhedron, and the other end is provided with a first magnet.

[0011] Furthermore, the first and second drive shafts are connected by a protruding and recessed polyhedron, with the protruding polyhedron inserted into the recessed polyhedron and a gap provided for axial movement of the first and second drive shafts. The movement of the first drive shaft is transmitted to the second drive shaft through the polyhedron assembly, causing the second drive shaft to move in the same manner.

[0012] Furthermore, the first winding is located at the U-shaped bottom of the first winding silicon steel sheet.

[0013] Furthermore, the surface of each individual winding is covered with an insulating layer.

[0014] Furthermore, a spring is provided between the second winding support and the second magnet.

[0015] The above technical solution has the following beneficial effects:

[0016] Compared to ordinary toothbrush motors, this invention utilizes the cooperation of a first drive shaft, a second drive shaft, a first winding, a second winding, a silicon steel sheet for the first winding, and a first magnet. After assembly, the leads at both ends of the first winding are connected to a DC power supply. When energized, the current briefly magnetizes the silicon steel sheet of the first winding. Under the influence of the magnetic field, the first magnet drives the first drive shaft to rotate. When the first magnet rotates, it is blocked by a protrusion in the central support, at which point the power supply stops, and the first drive shaft resets. When a reverse current is input, the first drive shaft rotates in the opposite direction. The first drive shaft vibrates and exhibits fan-shaped sweeping motion. A second winding and a second magnet are connected to a DC power supply at both ends of the second winding. When energized, the second winding generates a magnetic field with polarity opposite to that of the second magnet. Under the influence of these opposite magnetic poles, the second magnet, initially held open by a spring, and the second drive shaft fixed to it, move axially. When the power input is cut off, the second drive shaft springs open again. Adjusting the frequency of power input cutoff allows the second drive shaft to produce different axial movements, while inheriting the vibration and fan-shaped sweeping motion of the first drive shaft. This invention can generate vibration, fan-shaped sweeping motion, and axial movement. Compared to motor control using Hall effect adjustment for fan-shaped sweeping amplitude, this invention is simpler and more direct, saving costs. By placing the first winding at the tail of the vibration and sweeping section and directly energizing it, sparks are eliminated during commutation, making it safer. Attached Figure Description

[0017] Figure 1 This is an exploded structural diagram of an electric toothbrush motor that integrates sweeping and vibrating functions according to the present invention.

[0018] Figure 2 This is a schematic diagram of the overall structure of an electric toothbrush motor that integrates sweeping and vibrating functions according to the present invention.

[0019] Figure 3 for Figure 2 Section A-A in the diagram;

[0020] Figure 4 for Figure 2 B-B cross-section view in the middle;

[0021] Figure 5 for Figure 2 CC cross-section view in the middle;

[0022] Figure 6 This is a schematic diagram of the connection structure between the first drive shaft and the first magnet of an electric toothbrush motor that integrates sweeping and vibrating functions according to the present invention.

[0023] Figure 7 This is a schematic diagram of the structure of the second drive shaft of an electric toothbrush motor that integrates sweeping and vibrating brushing according to the present invention;

[0024] In the diagram: 1-Rear shell; 2-First winding support; 3-First winding; 4-First winding silicon steel sheet; 5-Middle support; 6-Second bearing; 7-First magnet; 8-First bearing; 9-First drive shaft; 10-Middle shell; 11-Second winding; 12-Second winding support; 13-Second magnet; 14-Second drive shaft; 15-Sleeve 15; 16-Front shell; 17-Spring. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] See Figures 1-7The electric toothbrush motor shown includes a rear shell 1, a middle shell 10, and a front shell 16. The front shell 16 and the rear shell 1 are respectively connected to the front and rear ends of the middle shell 10, so that the rear shell 1, the middle shell 10, and the front shell 16 form a cavity. The cavity is divided into three parts: a rear part, a middle part, and a front part. The two ends of the middle part are respectively connected to the rear part and the front part. The rear part includes a first winding 3, a first winding support 2, and a first winding silicon steel sheet 4. The first winding 3 is wound on the first winding support 2, and the first winding support 2 is fixed on the first winding silicon steel sheet 4.

[0027] The first winding 3 is a metal wire with an insulating layer on its surface. This insulating layer is made of a common insulating material in the prior art. Figure 1 and Figure 3 As shown, the first winding bracket 2 is first fixed on the first winding silicon steel sheet 4, and the first winding 3 is wound in the first winding bracket 2. The first winding is inserted into the rear shell 1, and the leads at both ends of the first winding are passed out from the rear shell 1 for easy connection later. This part is the rear section.

[0028] See Figure 6 As shown, one end of the first drive shaft 9 is designed with a polyhedral, i.e., a polygonal columnar structure, and the other end is provided with a first magnet 7. The second bearing 6 and the first bearing 8 are installed at both ends of the first drive shaft 9 with the first magnet 7, and then they are half-assembled onto the middle bracket 5 and the middle shell 10 is closed. This part is in the middle.

[0029] After assembling the front and middle parts together, the first drive shaft 9 will extend out of the middle shell 10. The second winding 11 is wound around the second winding bracket 12 and fixed together with the first drive shaft 9 at the front end of the middle shell 10. The leads at both ends of the second winding 11 extend out from the opening of the middle shell 10. The second drive shaft 14 is a metal part with one end larger than the other. The second magnet 13 is fixed at the larger end, and the smaller end passes through the front shell 16 equipped with the bushing 15 and is fixed to the rear and middle parts together.

[0030] The middle section includes a first drive shaft 9, a second winding 11, a first magnet 7, a first bearing 8, and a second bearing 6. The first drive shaft 9 is equipped with the first magnet 7, and the two ends of the first drive shaft 9 are equipped with the second bearing 6 and the first bearing 8. The second bearing 6 is located in a small hole in the middle support 5. The front section includes a second drive shaft 14, a second magnet 13, and a second winding support 12. The first drive shaft 9 extends from one end of the middle shell 10, and the second winding 11 is wound around the second winding support 12 and fixed together with the first drive shaft 9 at the center of the front end of the middle shell 10. The leads at both ends of the second winding 11 extend from the middle shell 14. The opening of the first drive shaft 9 extends outwards. The second drive shaft 14 is a metal piece with one end larger than the other. The second magnet 13 is fixed to the larger end, and the smaller end passes through the front shell 16, which is equipped with a bushing 15. The first winding is located at the end of the cavity near the rear shell 1. The two short leads of the first winding pass out from the rear shell 1 for easy connection later. One end of the first drive shaft 9 is a polyhedron, and the other end is equipped with a first magnet 7. The first drive shaft 9 and the second drive shaft 14 are connected by a protrusion and a recessed polyhedron. The protruding polyhedron is inserted into the recessed polyhedron, leaving a gap for axial movement of the first drive shaft 9 and the second drive shaft 14. The movement of the first drive shaft 9 is transmitted to the second drive shaft 14 through the polyhedron assembly, causing the second drive shaft to move in the same way. The first winding is located at the U-shaped bottom of the silicon steel sheet 4 of the first winding.

[0031] The specific working principle of this invention is as follows: The first winding 3 is set with the U-shaped bottom of the first winding silicon steel sheet 4. The leads A1 and A2 at both ends of the assembled motor's first winding 3 are connected to a suitable DC power supply. The energized first winding 3 uses the current to briefly magnetize the first winding silicon steel sheet 4. Under the action of the magnetic field, the first magnet 7, fixed between the first bearing 8 and the second bearing 6, drives the first transmission shaft 9 fixed thereon to rotate. (See [reference]) Figure 4 As shown, when the first magnet 7 rotates, it will be blocked by the protrusion in the middle bracket 5. At this time, the power supply stops and the first drive shaft 9 resets. When a reverse current is input again, the first drive shaft 9 rotates in the reverse direction. When the regulator switches the current direction multiple times within a unit time, the first drive shaft 9 will generate vibration and fan-shaped sweeping. The frequency can be adjusted to adjust the output sweeping frequency and intensity of the first drive shaft 9.

[0032] The second drive shaft 14 and the first drive shaft 9 of the present invention can slide axially. The two are connected by a protruding and a recessed polyhedron. The protruding polyhedron is inserted into the recessed polyhedron, and the two shafts can move axially due to an appropriate gap.

[0033] The movement of the first drive shaft 9 of the present invention is transmitted to the second drive shaft 14 through the polyhedral assembly, thereby driving the second drive shaft to move in the same way.

[0034] The present invention includes a second winding 11 and a second magnet 13. The two ends C1 and C2 of the second winding 11 are connected to a DC power supply. When the second winding 11 is energized, it generates a magnetic field, and the polarity of the magnetic field is opposite to the surface polarity of the second magnet 13. Under the action of the opposite magnetic poles, the second magnet 13, which was originally opened by the spring 17, and the second drive shaft 14 fixed thereon move axially. When the power input is cut off, the second drive shaft 14 is opened again by the spring 17. The frequency of power input cut-off can be adjusted to make the second drive shaft produce different axial movements, and it inherits the vibration and fan-sweep of the first drive shaft.

[0035] Compared to ordinary toothbrush motors, this invention utilizes the cooperation of a first drive shaft 9, a second drive shaft 14, a first winding, a second winding 11, a silicon steel sheet 4 for the first winding, and a first magnet 7. After assembly, the leads at both ends of the first winding are connected to a DC power supply. When energized, the first winding briefly magnetizes the silicon steel sheet 4. Under the influence of the magnetic field, the first magnet 7 drives the first drive shaft 9 to rotate. When the first magnet 7 rotates, it is blocked by a protrusion in the middle bracket 5, at which point the power supply stops, and the first drive shaft 9 resets. When a reverse current is input, the first drive shaft 9 rotates in the opposite direction. The moving shaft 9 generates vibration and fan-shaped sweeping motion. The second winding 11 and the second magnet 13 are connected to a DC power supply at both ends of the second winding 11. When energized, the second winding 11 generates a magnetic field with polarity opposite to that of the surface of the second magnet 13. Under the action of these opposite magnetic poles, the second magnet 13, originally held open by the spring 17, and the second drive shaft 14 fixed to it, move axially. When the power input is cut off, the second moving shaft 14 is reopened by the spring 17. Adjusting the frequency of power input cutoff allows the second moving shaft to generate different axial movements, while inheriting the vibration and fan-shaped sweeping motion of the first moving shaft. This invention can generate vibration, fan-shaped sweeping motion, and axial movement. Compared to motor control using Hall effect adjustment for fan-shaped sweeping amplitude, this invention is simpler and more direct, saving more costs. By placing the first winding at the tail of the vibration and sweeping section and directly energizing it, sparks are not generated during commutation, making it safer.

[0036] The basic principles and main features of the present invention have been described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from the spirit and scope of the present invention. All such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the invention is defined by the appended claims and their equivalents.

Claims

1. A motor for an integrated electric toothbrush with sweeping and vibrating motion, characterized in that, It includes a rear shell, a middle shell, and a front shell. The front and rear ends of the middle shell are respectively connected to the front shell and the rear shell, so that the interior of the rear shell, the middle shell, and the front shell forms a cavity. The cavity is divided into three parts: a rear part, a middle part, and a front part. The two ends of the middle part are respectively connected to the rear part and the front part. The rear part includes a first winding, a first winding support, and a first winding silicon steel sheet. The first winding is wound on the first winding support, and the first winding support is fixed on the first winding silicon steel sheet. The middle part includes a first drive shaft, a second winding, a first magnet, a first bearing, and a second bearing. The first drive shaft is provided with a first magnet, and the two ends of the first drive shaft are provided with a second bearing and a first bearing. The second bearing is located in a small hole opened in the middle support. The front part includes a second drive shaft, a second magnet, and a second winding support. The first drive shaft extends from one end of the middle shell, and the second winding is wound around the second winding support and fixed together with the first drive shaft at the center of the front end of the middle shell. The leads at both ends of the second winding extend from the opening of the middle shell.

2. The electric toothbrush motor integrating sweeping and vibrating functions according to claim 1, characterized in that, The second drive shaft is a metal part with one end larger than the other. The second magnet is fixed at the larger end, and the smaller end passes through the front shell with a bushing.

3. The electric toothbrush motor integrating sweeping and vibrating functions according to claim 1, characterized in that, The first winding is located at one end of the cavity near the rear shell, and the two short leads of the first winding pass through the rear shell to facilitate later connection.

4. The electric toothbrush motor integrating sweeping and vibrating functions according to claim 1, characterized in that, One end of the first drive shaft is a polyhedron, and the other end is provided with a first magnet.

5. The electric toothbrush motor integrating sweeping and vibrating functions according to claim 1, characterized in that, The first and second drive shafts are connected by a protruding and recessed polyhedron. The protruding polyhedron is inserted into the recessed polyhedron, leaving a gap to allow axial movement of the first and second drive shafts. The movement of the first drive shaft is transmitted to the second drive shaft through the polyhedron assembly, causing the second drive shaft to move in the same way.

6. A sweeping and vibrating electric toothbrush motor according to claim 1 or 3, characterized in that, The first winding is located at the U-shaped bottom of the silicon steel sheet of the first winding.

7. The electric toothbrush motor integrating sweeping and vibrating functions according to claim 6, characterized in that, All of the aforementioned windings have an insulating layer covering their individual surfaces.

8. The electric toothbrush motor integrating sweeping and vibrating functions according to claim 1, characterized in that, A spring is provided between the second winding support and the second magnet.

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