Double-head electric toothbrush

Abstract

The double-head electric toothbrush comprises a handle part and a brush head part, the handle part comprises a connecting rod shaft, the brush head part comprises a first brush head and a second brush head which are connected and can rotate relatively, and the first brush head is connected with the second brush head and the connecting rod shaft in a meshed mode; and at least one part of the connecting rod shaft rotates at a preset angle, so that the first brush head and the second brush head are driven to rotate at the preset angle. According to the double-head electric toothbrush, a connecting mechanism and a transmission mechanism are effectively reduced, and noise generated when the double-head electric toothbrush works is effectively reduced.

Description

Technical Field

[0001] This invention relates to electric toothbrush technology, and more particularly to a dual-head electric toothbrush. Background Technology

[0002] Toothbrushes are used to detect and treat cavities, bad breath, teeth whitening, and to clean bacteria, plaque, and combinations thereof in the mouth. Currently, electric toothbrushes are widely used due to their convenience and efficient cleaning capabilities. However, existing electric toothbrushes, especially dual-headed ones, often produce significant noise due to the numerous connecting mechanisms. Summary of the Invention

[0003] The main objective of this invention is to provide a dual-headed electric toothbrush to solve the problem of excessive noise caused by the numerous connecting mechanisms in existing dual-headed electric toothbrushes.

[0004] According to an embodiment of the present invention, a dual-headed electric toothbrush is provided, comprising: a handle portion and a brush head, wherein the handle portion includes a connecting rod shaft, and the brush head includes a first brush head and a second brush head connected to each other and rotatable relative to each other, wherein the first brush head is engaged with the second brush head and the connecting rod shaft respectively; wherein at least a portion of the connecting rod shaft rotates at a predetermined angle, thereby driving the first brush head and the second brush head to rotate at the predetermined angle.

[0005] The distal end of the connecting rod shaft has a shift fork, and the first brush head has a first set of teeth that are adapted to the shift fork and are arranged downwards. The shift fork is engaged with the first set of teeth of the first brush head.

[0006] The first brush head has a second set of teeth facing upwards, and the second brush head has a third set of teeth facing downwards that are adapted to the second set of teeth. The second set of teeth of the first brush head and the third set of teeth of the second brush head are engaged and connected.

[0007] The second brush head is generally circular, while the portion of the first brush head closest to the second brush head is arc-shaped.

[0008] Wherein, the predetermined angle is less than or equal to 20 degrees.

[0009] According to the technical solution of the present invention, a fork is provided at the far end of the connecting rod shaft to engage with one end of the first brush head, and the gear teeth at the other end of the first brush head engage with the gear teeth of the second brush head. The above structure effectively reduces the connection mechanism and transmission mechanism, and effectively reduces the noise generated by the double-headed electric toothbrush during operation. Attached Figure Description

[0010] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0011] Figure 1 This is a schematic diagram of a dual-headed electric toothbrush according to an embodiment of the present invention;

[0012] Figure 2 This is a schematic diagram of two brush heads connected in accordance with an embodiment of the present invention;

[0013] Figure 3A This is a schematic diagram of the first brush head according to an embodiment of the present invention;

[0014] Figure 3B This is a schematic diagram of the second brush head according to an embodiment of the present invention;

[0015] Figure 4 This is a schematic diagram of the fork and the first brush head according to an embodiment of the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0017] Although the present invention specification may include various different embodiments, it should be understood that, with regard to some preferred embodiments described in detail in the specification and shown in the accompanying drawings, the contents disclosed in the present invention specification should be regarded as illustrative of the principles of the invention, and the embodiments shown are not intended to limit the scope of protection of the present invention.

[0018] The technical solutions provided by the various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] refer to Figure 1According to an embodiment of the present invention, a dual-headed electric toothbrush is provided, comprising an elongated handle portion 1 and a brush head 2. The handle portion 1 is an elongated hollow body, within which an electric motor (not shown) and a transmission mechanism (not shown) are disposed. The motor and transmission mechanism provide power to a first brush head and a second brush head disposed near the distal end of the toothbrush. A power source, such as a rechargeable battery, for powering the motor is also disposed within the hollow body of the handle portion 1. Optionally, the electric toothbrush can be connected to an external power source to power the motor. It should be understood that a switch (not shown) is also provided along the outer region of the handle portion 1 for starting or stopping the motor.

[0020] refer to Figure 2 As shown in Figure 3, according to an embodiment of this application, the brush head 2 of the electric toothbrush includes a first brush head 21 and a second brush head 22 arranged side by side, wherein the first brush head 21 is closer to the handle portion 1. For simplicity, this document divides the brush head of the electric toothbrush into a front and a back, for example as... Figure 1 The brush head shown is displayed from the front, and the other side is the back. Furthermore, the terms "above" or "below" used in this document are... Figure 1 The toothbrush shown is oriented with the brush head facing upwards relative to the handle.

[0021] As shown in the figure, the first brush head 21 and the second brush head 22 are roughly circular in shape, with the second brush head 22 being a more regular circle. The part of the first brush head 21 near the second brush head 22 (i.e., the upper part of the first brush head 21) is arc-shaped. This allows the first brush head 21 and the second brush head 22 to be positioned closer together, and the brush heads will not affect each other when they swing or rotate.

[0022] In this application, the first brush head 21 and the second brush head 22 of the brush head 2 are close to each other and meshed. Referring to the accompanying drawings, the first brush head 21 has a first set of teeth 211 facing downward and a second set of teeth 212 facing upward. The second brush head 22 has a third set of teeth 221 facing downward, which is adapted to the second set of teeth 212. That is, the second set of teeth 212 of the first brush head 21 and the third set of teeth 221 of the second brush head 22 are meshed and connected. When the first brush head 21 swings or rotates at a certain angle, it can drive the second brush head 22 to swing or rotate.

[0023] According to an embodiment of this application, the electric toothbrush has a built-in connecting rod shaft that extends from the motor through the handle to the brush head. When driven by the motor, at least a portion of the connecting rod shaft can rotate, oscillate, or turn to cause the brush head to perform one or more movements. Furthermore, a transmission device can be provided between the motor and the connecting rod shaft to move the connecting rod shaft.

[0024] refer to Figure 4A shift fork 31 is provided at the distal end of the connecting rod shaft. The shift fork 31 is adapted to the first set of gear teeth 211 of the first brush head 21, thereby connecting the shift fork 31 to the first brush head 21. Figure 4 In the embodiment shown, the first set of gear teeth 211 of the first brush head 21 includes 3 gear teeth. The fork 31 is inserted into the first set of gear teeth 211 (or tooth groove) to make the two mesh. When the fork 31 swings or rotates at a certain angle, it can drive the first brush head 21 to swing or rotate.

[0025] In this embodiment, the brush head 2 of the electric toothbrush further includes a bristle carrier with multiple bristles (not shown). When the switch is turned on, the motor is activated, and the motor drives the connecting rod shaft to swing or rotate at a certain angle, thereby causing the first brush head 21 and the second brush head 22 to swing or rotate at a certain angle, which can be between 5 and 20 degrees, for example, 15 degrees.

[0026] In summary, according to the above technical solution of the present invention, a fork is provided at the far end of the connecting rod shaft to engage with one end of the first brush head, and the gear teeth at the other end of the first brush head engage with the gear teeth of the second brush head. The above structure effectively reduces the connection mechanism and transmission mechanism, and effectively reduces the noise generated by the dual-head electric toothbrush during operation.

[0027] Although this disclosure has been described in detail with reference to specific embodiments thereof, those skilled in the art will understand that various changes and modifications may be made therein without departing from the spirit and scope of the embodiments. Therefore, this application is intended to cover modifications and variations thereof, and any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application shall be included within the scope of the claims of this application and their equivalents.

[0028] Furthermore, features disclosed in the foregoing description, claims, or drawings, expressed in their specific form or according to the manner of performing the disclosed function or the method or process for obtaining the disclosed result, may, as appropriate, be used alone or in any combination of these features to implement this application in their different forms. Specifically, one or more features of any embodiment described in this application may be combined with one or more features of any other embodiment described in this application.

[0029] Protection may also be sought for any feature disclosed in any one or more publications cited in or combined by reference in this application.

Claims

1. A dual-headed electric toothbrush, characterized in that, include: The brush head includes a handle and a brush head. The handle includes a connecting rod shaft, and the brush head includes a first brush head and a second brush head that are connected to each other and rotatable relative to each other. The first brush head is engaged with the second brush head and the connecting rod shaft, respectively. At least a portion of the connecting rod shaft rotates at a predetermined angle, thereby driving the first brush head and the second brush head to rotate at the predetermined angle.

2. The dual-headed electric toothbrush according to claim 1, characterized in that, The distal end of the connecting rod shaft has a shift fork, and the first brush head has a first set of teeth that are adapted to the shift fork and are arranged downwards. The shift fork is engaged with the first set of teeth of the first brush head.

3. The dual-headed electric toothbrush according to claim 1, characterized in that, The first brush head has a second set of teeth facing upwards, and the second brush head has a third set of teeth facing downwards that are adapted to the second set of teeth. The second set of teeth of the first brush head and the third set of teeth of the second brush head are engaged and connected.

4. The dual-headed electric toothbrush according to claim 1, characterized in that, The second brush head is generally circular in shape, while the portion of the first brush head near the second brush head is arc-shaped.

5. The dual-headed electric toothbrush according to claim 1, characterized in that, The predetermined angle is less than or equal to 20 degrees.

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