Driving device of sweeping vibration type sound wave electric toothbrush

Abstract

The utility model discloses a driving device of a sweep vibration type sound wave electric toothbrush, which is characterized by comprising at least two electrified coils, a driving rod, a mounting seat and a permanent magnet, in the electrified coils, low-frequency alternating current with the frequency of A is introduced into at least one electrified coil, high-frequency alternating current with the frequency of B is introduced into at least one electrified coil, and the permanent magnet is arranged on the mounting seat. The driving rod can rotate and vibrate, the permanent magnet and the electrified coil are arranged between the mounting seat and the driving rod, the electrified coil is electrified to generate magnetism to act on the permanent magnet, the low-frequency alternating current is used for driving the driving rod to rotate back and forth periodically, and the high-frequency alternating current is used for driving the driving rod to vibrate.

Description

Technical Field

[0001] The utility model relates to a driving device of a sweeping vibration type sonic wave electric toothbrush. Background Art

[0002] The new sweeping vibration electric toothbrush on the market uses a DC brushless motor (modulated by DC into AC drive), a Hall sensor and a drive control circuit to achieve sweeping vibration (i.e. low-frequency rotation of about 2-20Hz and high-frequency vibration of more than 100Hz) movement of the electric toothbrush. Compared with a single-frequency vibration toothbrush, a sweeping vibration toothbrush can clean teeth better. However, this implementation method has a complex structure and is extremely costly.

[0003] Most of the electric toothbrushes popular on the market now use sonic motors: including permanent magnets (one or a group of horizontally arranged) and electromagnets. The electromagnets are provided with one or more sets of coils. When a single frequency alternating current is passed through, the changing magnetic field generated by the electromagnets interacts with the permanent magnets to produce reciprocating rotation relative to the central axis, thereby driving the toothbrush head to vibrate reciprocatingly. This type of sonic motor is brushless, non-DC brushless motor, and non-AC split-phase motor. It has a simple and reliable structure and can be roughly classified into the following five structures.

[0004] Comparative document CN205212674U, internal and external type, the stator is a permanent magnet on the outside, the rotor is an electromagnet on the inside, and it has mechanical reset.

[0005] Comparative document CN210839294U, internal and external type, the stator is an electromagnet on the outside, the rotor is a permanent magnet on the inside, and it has mechanical reset.

[0006] Comparative document CN205864218U, inside-outside type; the rotor is an electromagnet inside; the stator is outside, which is two sets of permanent magnets with different polarities. When the rotor rotates to a certain angle, the alternating magnetic field and one set of permanent magnets produce braking and resetting effects.

[0007] Comparative document CN218102820U, inside-outside type; the rotor is two sets of permanent magnets with different polarities arranged at different levels; the stator is an electromagnet on the outside. When the rotor rotates to a certain angle, the alternating magnetic field and one set of permanent magnets act to produce braking and resetting effects.

[0008] The above four types can also be made with the rotor outside, but this will increase the complexity of the structure and no one in the market uses this structure.

[0009] The reference document CN101297775A is a top-bottom type, where the vibrator is a permanent magnet at the top and the electromagnet is an electromagnet at the bottom. The vibration of the vibrator is converted into reciprocating rotation under the action of the bracket.

[0010] In addition, although the comparative document CN1806377A also has two sets of coils and two sets of possibly different AC drives, the two electromagnets act on permanent magnets with different magnetic pole arrangement directions and not in the same horizontal position, resulting in the superposition of vibration and axial movement.

[0011] The comparative document CN1691921A shows that there are two sets of independent magnetic circuits, which are respectively composed of two sets of coils and two sets of permanent magnets with different polarity directions and not in the same horizontal position. The structure is vibration superimposed on axial motion; in order to adapt the functions realized by the structure, the two magnetic circuits need to be connected in series, that is, the two sets of coils and the two sets of permanent magnets are in different horizontal positions (all references to "horizontal position" and "horizontal setting" in this article refer to the components being in the same horizontal position, or being set in the same horizontal position, when the toothbrush head is placed vertically upward). This increases the volume of the electric toothbrush and increases the manufacturing cost. Summary of the invention

[0012] The purpose of the utility model is to provide a driving device for a sweeping vibration type sonic electric toothbrush to solve the problems raised in the above background technology. To achieve the above purpose, the utility model provides the following technical solutions:

[0013] A driving device for a sweeping vibration sonic electric toothbrush comprises at least two energized coils, a driving rod and a mounting seat, and a permanent magnet. Among the energized coils, at least one energized coil is supplied with a low-frequency alternating current with a frequency A and at least one energized coil is supplied with a high-frequency alternating current with a frequency B. The driving rod is mounted on the mounting seat and can rotate and vibrate. The permanent magnet and the energized coil are arranged between the mounting seat and the driving rod. The energized coil generates a magnetic effect on the permanent magnet. The low-frequency alternating current is used to drive the driving rod to rotate back and forth periodically, and the high-frequency alternating current is used to drive the driving rod to vibrate.

[0014] There are one or more permanent magnets, and multiple permanent magnets are arranged horizontally.

[0015] Among them, A is 2-20Hz and B is above 100Hz.

[0016] Among them, the energized coil is arranged horizontally.

[0017] The mounting seat is provided with a bearing, and the driving rod is mounted on the bearing.

[0018] The beneficial effects of the utility model are: the utility model has a simple and compact structure, is easy to use, has high practicality, and has a greatly reduced production cost compared with the existing sweeping vibration toothbrushes on the market. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 1 It is a schematic diagram of the assembly structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the explosion structure of the utility model.

[0022] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding. DETAILED DESCRIPTION

[0023] 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 only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0024] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0025] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0026] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0027] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0028] It should also be understood that the terms used in the utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in the 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.

[0029] 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.

[0030] like Figure 1 and 2 As shown, a driving device of a sweeping vibration type sonic electric toothbrush comprises at least two energized coils 1, a driving rod 2 and a mounting seat 3, wherein at least one of the energized coils 1 is supplied with a low-frequency alternating current with a frequency A and at least one of the energized coils 1 is supplied with a high-frequency alternating current with a frequency B, the driving rod 2 is mounted on the mounting seat 3 and can rotate and vibrate, wherein the driving rod 2 is provided with a permanent magnet 21, and the energized coil 1 is energized to generate a magnetic effect on the permanent magnet 21, wherein the low-frequency alternating current is used to drive the driving rod 2 to rotate back and forth periodically, and the high-frequency alternating current is used to drive the driving rod 2 to vibrate.

[0031] In the present invention, different energized coils 1 are used to input alternating currents of different frequencies, wherein the low-frequency alternating current is used to drive the driving rod 2 to rotate back and forth periodically so that the toothbrush swings back and forth, and the high-frequency alternating current is used to drive the driving rod 2 to vibrate.

[0032] As a further solution of the present invention: the permanent magnet 21 can be one or more. In the case of more than one, all permanent magnets 21 are arranged horizontally, so that the two sets of coils can be arranged horizontally (when the electric toothbrush is in a vertical state) instead of being arranged in series (see Figure 2 ), which can reduce product size, increase reliability and reduce production costs.

[0033] As a further solution of the present invention: wherein A is 2-20 Hz, and B is above 100 Hz.

[0034] As a further solution of the utility model: wherein, the energized coil 1 is horizontally arranged. Different from the comparative document CN1691921A, the present invention does not have two independent magnetic circuits, but the alternating magnetic fields generated by two sets of coils arranged horizontally act on a permanent magnet or a group of horizontal permanent magnets, which simplifies the design and reduces the product volume.

[0035] As a further solution of the utility model: the mounting seat 3 is installed with a bearing 4, and the driving rod 2 is installed on the bearing 4.

[0036] By using the content of the present invention, the five types of sonic wave motors described in the background technology can be transformed into sweeping vibration sonic wave motors.

[0037] Regarding the embodiments of the present utility model, it should also be noted that, in the absence of conflict, the embodiments of the present utility model and the features therein can be combined with each other to obtain new embodiments.

[0038] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. The protection scope of the utility model shall be based on the protection scope of the claims. Although the utility model has been disclosed as a preferred embodiment, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modify the technical content disclosed above to an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the technical solution of the utility model.

Claims

1. A driving device for a sweeping vibration sonic electric toothbrush, characterized in that: It includes at least two energized coils, a driving rod and a mounting seat, and a permanent magnet. Among the energized coils, at least one energized coil is supplied with a low-frequency alternating current with a frequency A, and at least one energized coil is supplied with a high-frequency alternating current with a frequency B. The driving rod can rotate and vibrate. The permanent magnet and the energized coil are arranged between the mounting seat and the driving rod. The energized coil generates a magnetic effect on the permanent magnet. The low-frequency alternating current is used to drive the driving rod to rotate back and forth periodically, and the high-frequency alternating current is used to drive the driving rod to vibrate.

2. The driving device of a sweeping vibration type sonic electric toothbrush according to claim 1, characterized in that: in, The energized coil is set horizontally.

3. The driving device of a sweeping vibration type sonic electric toothbrush according to claim 1, characterized in that: There are one or more permanent magnets, wherein multiple permanent magnets are arranged horizontally.

4. The driving device of a sweeping vibration type sonic electric toothbrush according to claim 1, characterized in that: in, A is 2-20Hz, B is above 100Hz.

5. The driving device of a sweeping vibration type sonic electric toothbrush according to claim 1, characterized in that: The mounting seat is provided with a bearing, and the driving rod is mounted on the bearing.

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