A transmission structure for coaxially driving the toothbrush head to swing left and right.

Abstract

This utility model discloses a transmission structure for coaxially driving a toothbrush head to swing left and right, including a drive motor, a transmission component, and a drive shaft. The transmission component includes an eccentric shaft, a drive arm, and a driven arm. The input end of the transmission component is fixedly connected to the output shaft of the drive motor, and the output end of the transmission component is fixedly connected to the drive shaft. The drive shaft and the output shaft of the drive motor are coaxially arranged. By using the transmission structure of this utility model, the tooth-cleaning effect that originally required an expensive sonic motor can be achieved by using a low-cost rotary motor to drive the transmission component, which greatly reduces the manufacturing cost and power consumption. Moreover, by using this transmission structure, the drive shaft and the output shaft of the drive motor can be coaxially arranged, avoiding unnecessary product volume increase due to the misalignment of the two shafts and effectively avoiding the awkwardness that occurs when the two shafts are eccentrically arranged during use, thus perfectly optimizing the structure of traditional electric toothbrushes.

Description

Technical Field

[0001] This utility model relates to the field of electric toothbrush technology, specifically a transmission structure that coaxially drives the toothbrush head to swing left and right. Background Technology

[0002] With improved living standards, people are paying more and more attention to their health. Dental health, previously neglected, is now receiving renewed attention. Brushing teeth is a crucial part of maintaining dental health. However, due to uneven pressure and incorrect techniques, manual brushing may miss or fail to clean many areas, leading to plaque buildup. Similarly, brushing too vigorously can cause wear and tear on teeth and gums.

[0003] In this context, electric toothbrushes were developed. Electric toothbrushes can remove 38% more plaque than manual toothbrushes, and their vibration frequency is unmatched by traditional toothbrushes, rubbing the teeth tens of thousands of times per minute, compared to the more than one hundred rubs per minute of a traditional toothbrush, resulting in a more significant cleaning effect.

[0004] Most existing technologies use sonic motors to directly drive the toothbrush head handle to make it swing left and right for brushing. However, the functionality of sonic motors means that their manufacturing cost is relatively high and their power consumption is also relatively large. In an increasingly competitive industry environment, they have shown obvious signs of fatigue.

[0005] Therefore, how to design a technical solution that can effectively reduce manufacturing costs and power consumption without affecting the original performance of the product is a problem that needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a coaxial drive transmission structure for the left-right oscillation of a toothbrush head. In this transmission structure, only a low-cost rotary motor drive transmission component is needed to achieve the same brushing cleaning effect as a high-cost sonic motor, significantly reducing manufacturing costs and power consumption. Moreover, this transmission structure allows the drive shaft and the output shaft of the drive motor to be coaxially set, avoiding unnecessary product volume increase due to misalignment of the two shafts and effectively avoiding the awkwardness that occurs when the two shafts are eccentrically set during use. It perfectly optimizes the structure of traditional electric toothbrushes and solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a transmission structure for coaxially driving a toothbrush head to swing left and right, comprising a drive motor, a transmission assembly, and a drive shaft. The transmission assembly includes an eccentric shaft, a drive arm, and a driven arm. The input end of the transmission assembly is fixedly connected to the output shaft of the drive motor, and the output end of the transmission assembly is fixedly connected to the drive shaft. The mechanical energy generated by the drive motor during operation is transmitted to the drive shaft through the transmission assembly, causing the drive shaft to reciprocate around its central axis. The drive shaft and the output shaft of the drive motor are coaxially arranged.

[0008] Preferably, the drive motor is fixedly connected to a support bracket, the support bracket is provided with a first hinge member, the drive arm is a linear component, one end of the linear component is provided with a second hinge member, the other end is provided with a second sliding hole, the linear component is provided with a first sliding hole located between the second hinge member and the second sliding hole, one end of the driven arm is provided with a shaft, the second hinge member is hinged to the first hinge member, the output shaft of the eccentric shaft is slidably inserted into the first sliding hole, the shaft on the driven arm is slidably inserted into the second sliding hole, and the other end of the driven arm is fixedly connected to the drive shaft.

[0009] Preferably, the support bracket includes an upper bracket shell and a lower bracket shell that are connected together. The lower bracket shell is fixedly connected to the drive motor, and the upper bracket shell is disposed below the drive shaft. The upper bracket shell is used to support the drive shaft.

[0010] Preferably, the first hinge is a shaft seat, and the second hinge is a bushing, wherein the bushing is fitted onto the shaft seat to achieve mutual rotational hinge.

[0011] Preferably, the device includes a bearing seat, the drive shaft passes through the bearing seat and is rotatably connected to the bearing seat, the bearing seat limits the drive shaft so that the drive shaft is coaxially arranged with the output shaft of the drive motor.

[0012] Preferably, the drive motor is a rotary motor.

[0013] Compared with the prior art, the beneficial effects of this utility model are: By applying the transmission structure of this utility model, the brushing and cleaning effect that originally required an expensive sonic motor can be achieved by using a low-cost rotary motor drive transmission component. This significantly reduces manufacturing costs and power consumption. Moreover, this transmission structure allows the drive shaft and the output shaft of the drive motor to be coaxial, avoiding unnecessary product volume increase due to the misalignment of the two shafts and effectively avoiding the awkwardness that occurs when the two shafts are eccentric. This perfectly optimizes the structure of traditional electric toothbrushes. Attached Figure Description

[0014] Figure 1 This utility model is a structural explosion Figure 1 ; Figure 2 Explosion of the structure of this utility model Figure 2 ; Figure 3 This is a schematic diagram of the combined form structure of this utility model; Figure 4 This is a schematic diagram of the lower shell structure of the bracket of this utility model.

[0015] In the figure: 1 drive motor; 2 bearing bracket; 21 lower bracket shell; 22 upper bracket shell; 23 first hinge; 3 shaft seat; 4 eccentric shaft; 5 drive arm; 51 second hinge; 52 first sliding hole; 53 second sliding hole; 6 driven arm; 61 shaft; 7 drive shaft. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-4 A transmission structure for coaxially driving a toothbrush head to swing left and right includes a drive motor 1, a transmission assembly, and a drive shaft 7. The transmission assembly includes an eccentric shaft 4, a drive arm 5, and a driven arm 6. The input end of the transmission assembly is fixedly connected to the output shaft of the drive motor 1, and the output end of the transmission assembly is fixedly connected to the drive shaft 7. The mechanical energy generated by the drive motor 1 when it is working is transmitted to the drive shaft 7 through the transmission assembly, causing the drive shaft 7 to reciprocate around its central axis. The drive shaft 7 is coaxially arranged with the output shaft of the drive motor 1.

[0018] The drive motor 1 is fixedly connected to a support bracket 2. The support bracket 2 includes an upper bracket shell 22 and a lower bracket shell 21 connected by upper and lower covers. The lower bracket shell 21 is fixedly connected to the drive motor 1. The upper bracket shell 22 is located below the drive shaft 7 and is used to support the drive shaft 7 to increase the stability of the drive shaft 7 in three-dimensional space. The support bracket 2 is provided with a first hinge member 23. The drive arm 5 is a linear component. One end of the linear component is provided with a second hinge member 51, and the other end is provided with a second sliding hole 5. 3. A first sliding hole 52 is provided on the linear component between the second hinge member 51 and the second sliding hole 53. A shaft 61 is provided at one end of the driven arm 6. In this embodiment, the first hinge member 23 is a shaft seat, and the second hinge member 51 is a bushing. The bushing is sleeved on the shaft seat to achieve mutual rotational hinge. The output shaft of the eccentric shaft member 4 is slidably inserted into the first sliding hole 52. The shaft 61 on the driven arm 6 is slidably inserted into the second sliding hole 53. The other end of the driven arm 6 is fixedly connected to the drive shaft 7.

[0019] A bearing seat 3 is provided above the support bracket 22. The drive shaft 7 passes through the bearing seat 3 and is rotatably connected to the bearing seat 3. The bearing seat 3 limits the drive shaft 7 so that the drive shaft 7 is coaxially arranged with the output shaft of the drive motor 1.

[0020] The drive motor 1 is a rotary motor, which refers to a common brushed permanent magnet DC motor. When it works with DC power, it can only rotate 360 ​​degrees. This motor has high conversion efficiency, is manufactured using traditional and mature processes, and uses relatively inexpensive materials such as ferrite magnets inside the motor, so the manufacturing cost is low. However, to achieve left and right reciprocating oscillation, it needs to be coordinated with the transmission components in this technical solution. While acoustic motors can directly perform reciprocating oscillations, their manufacturing requires expensive strategic materials like neodymium iron boron (rare earth elements), making them very costly. Furthermore, during the reciprocating oscillation process, acoustic motors exhibit significant rotational inertia upon reaching the end of their stroke. To achieve rotor rotation at this point, a magnetic field is needed to provide a force sufficient to counteract this inertia. After the rotational inertia is eliminated, the magnetic field also needs to provide a thrust to drive the rotor in the opposite direction. However, using the rotary motor and transmission components of this technical solution eliminates the need to counteract this inertial force loss. Moreover, the rotary motor itself carries inertia during rotation, further reducing the loss of the original driving force. Therefore, using this technical solution significantly reduces power consumption compared to using acoustic motors.

[0021] In summary, by applying the transmission structure of this utility model, the brushing and cleaning effect that originally required an expensive sonic motor can be achieved using only a low-cost rotary motor drive transmission component. This significantly reduces manufacturing costs and power consumption. Furthermore, this transmission structure allows the drive shaft 7 and the output shaft of the drive motor 1 to be coaxially arranged, avoiding unnecessary product volume increase due to the misalignment of the two shafts and effectively avoiding the awkwardness that occurs when the two shafts are eccentrically set during use. This perfectly optimizes the structure of traditional electric toothbrushes.

[0022] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transmission structure for coaxially driving the left and right oscillation of a toothbrush head, comprising a drive motor (1), a transmission assembly, and a drive shaft (7), characterized in that: The transmission assembly includes an eccentric shaft (4), a drive arm (5), and a driven arm (6). The input end of the transmission assembly is fixedly connected to the output shaft of the drive motor (1), and the output end of the transmission assembly is fixedly connected to the drive shaft (7). The mechanical energy generated by the drive motor (1) when it is working is transmitted to the drive shaft (7) through the transmission assembly, causing the drive shaft (7) to reciprocate around the central axis of the drive shaft (7). The drive shaft (7) is coaxially arranged with the output shaft of the drive motor (1).

2. The transmission structure for coaxially driving the toothbrush head to swing left and right according to claim 1, characterized in that: The drive motor (1) is fixedly connected to a support bracket (2). The support bracket (2) is provided with a first hinge (23). The drive arm (5) is a linear component. One end of the linear component is provided with a second hinge (51), and the other end is provided with a second sliding hole (53). The linear component is provided with a first sliding hole (52) located between the second hinge (51) and the second sliding hole (53). One end of the driven arm (6) is provided with a shaft (61). The second hinge (51) is hinged to the first hinge (23). The output shaft of the eccentric shaft (4) is slidably inserted into the first sliding hole (52). The shaft (61) on the driven arm (6) is slidably inserted into the second sliding hole (53). The other end of the driven arm (6) is fixedly connected to the drive shaft (7).

3. The transmission structure for coaxially driving the toothbrush head to swing left and right according to claim 2, characterized in that: The support bracket (2) includes an upper bracket shell (22) and a lower bracket shell (21) connected by upper and lower covers. The lower bracket shell (21) is fixedly connected to the drive motor (1). The upper bracket shell (22) is located below the drive shaft (7) and is used to support the drive shaft (7).

4. The transmission structure for coaxially driving the toothbrush head to swing left and right according to claim 2, characterized in that: The first hinge (23) is a shaft seat, and the second hinge (51) is a bushing. The bushing is fitted onto the shaft seat to achieve mutual rotational hinge.

5. A transmission structure for coaxially driving the toothbrush head to swing left and right according to any one of claims 1 to 3, characterized in that: Includes a bearing seat (3), the drive shaft (7) is disposed through the bearing seat (3) and is rotatably connected to the bearing seat (3), the bearing seat (3) limits the drive shaft (7) so that the drive shaft (7) is coaxially disposed with the output shaft of the drive motor (1).

6. A transmission structure for coaxially driving the toothbrush head to swing left and right according to any one of claims 1 to 3, characterized in that: The drive motor (1) is a rotary motor.

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