Transmission structure for driving toothbrush head to swing left and right

Abstract

The transmission structure for driving the toothbrush head to swing left and right comprises a driving motor, a transmission assembly and a driving shaft, the transmission assembly comprises an eccentric cam, a driving arm and a driven arm, the two opposite ends of the driving arm and the driven arm are hinged to each other, the eccentric cam is fixedly arranged on an output shaft of the driving motor, and the eccentric cam is fixedly arranged on the output shaft of the driving motor. A shaft sleeve is arranged at the end, far away from the end hinged to the driven arm, of the driving arm, the shaft sleeve is arranged on the eccentric cam in the circumferential direction and connected with the eccentric cam in a sliding and rotating mode, and the end, far away from the end hinged to the driving arm, of the driven arm is fixedly connected with the driving shaft. By means of the transmission structure, the tooth brushing cleaning effect which can be achieved only by using a rotary motor with low manufacturing cost to drive the transmission assembly can be achieved, and therefore the tooth brushing cleaning effect can be achieved only by using a sound wave type motor with high manufacturing cost. And the production and manufacturing cost is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of electric toothbrush technology, specifically a transmission structure for driving 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 toothbrushes 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 without affecting the original performance of the product is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a transmission structure for driving the toothbrush head to swing left and right. In this transmission structure, only a low-cost rotary motor is needed to drive the transmission component to achieve the same brushing and cleaning effect as that originally required a high-cost sonic motor, which greatly reduces the manufacturing cost 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 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 cam, a drive arm, and a driven arm. The drive arm and the driven arm are arranged facing each other with their ends hinged to each other. An eccentric cam is fixedly mounted on the output shaft of the drive motor. A bushing is provided at the end of the drive arm away from the end hinged to the driven arm. The bushing is sleeved on the eccentric cam in the circumferential direction and is slidably rotatably connected to the eccentric cam. The end of the driven arm away from the end hinged to the drive arm is fixedly connected to the drive shaft. When the output shaft of the drive motor rotates, the eccentric cam rotates eccentrically, driving the drive arm and the driven arm together to drive the drive shaft to reciprocate around the central axis of the drive shaft.

[0008] Preferably, the driving arm and the driven arm are connected in series via a hinge shaft to achieve mutual hinge connection.

[0009] Preferably, the drive motor is fixedly connected to a support bracket, the support bracket is provided with a bearing seat, the drive shaft passes through the bearing seat and is rotatably connected to the bearing seat.

[0010] Preferably, the drive motor is a rotary motor.

[0011] Preferably, bearing mounting seats are coaxially provided at both ends of the shaft seat, bearings are installed in the bearing mounting seats, the drive shaft passes through the bearings, and the drive shaft is rotatably connected to the shaft seat through the bearings.

[0012] Preferably, a brush head connecting shaft is fixedly connected to one end of the drive shaft, and the brush head connecting shaft is used to connect the handle of the electric toothbrush head.

[0013] Preferably, the handle of the electric toothbrush head is detachably connected to the brush head connecting shaft.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] By applying the transmission structure of this invention, the brushing cleaning effect that originally required an expensive sonic motor can be achieved using only a low-cost rotary motor to drive the transmission component, significantly reducing manufacturing costs. Furthermore, during the production design phase, the power consumption and force of the drive motor can be adjusted by appropriately changing the torque of the driven arm according to actual application needs. For example, with the built-in battery capacity of the electric toothbrush remaining constant, extending the torque of the driven arm can reduce the power consumption of the drive motor, thereby effectively extending the working time of the electric toothbrush. Alternatively, with the power consumption of the drive motor remaining constant, shortening the torque of the driven arm can reduce the brushing oscillation force of the electric toothbrush, while extending the torque of the driven arm can increase the brushing oscillation force. This makes the product design and production more flexible after applying this transmission structure, ultimately significantly improving the cost-effectiveness of electric toothbrushes using this technical solution. Attached Figure Description

[0016] Figure 1 Explosion of the structure of this utility model Figure 1 ;

[0017] Figure 2 Explosion of the structure of this utility model Figure 2 ;

[0018] Figure 3 Explosion of the structure of this utility model Figure 3 ;

[0019] Figure 4 This is a schematic diagram of the combined form structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the bearing seat and bearing mounting base of this utility model. Figure 1 ;

[0021] Figure 6 This is a schematic diagram of the structure of the bearing seat and bearing mounting base of this utility model. Figure 2 .

[0022] In the diagram: 1. Drive motor; 2. Transmission assembly; 21. Eccentric cam; 22. Drive arm; 221. Bushing; 23. Hinge shaft; 24. Drive arm; 3. Drive shaft; 4. Bearing bracket; 41. Shaft seat; 42. Bearing mounting seat; 43. Bearing; 5. Brush head connecting shaft. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-6 A transmission structure for driving a toothbrush head to swing left and right includes a drive motor 1, a transmission assembly 2, and a drive shaft 3. The transmission assembly 2 includes an eccentric cam 21, a drive arm 22, and a driven arm 24. The drive arm 22 and the driven arm 24 are arranged facing each other, and their ends are connected in series by a hinge shaft 23 to achieve mutual hinge. An eccentric cam 21 is fixedly mounted on the output shaft of the drive motor 1. A bushing 221 is provided on the end of the drive arm 22 away from the hinged end with the driven arm 24. The bushing 221 is sleeved on the eccentric cam 21 in the circumferential direction and is slidably rotatably connected to the eccentric cam 21. The end of the driven arm 24 away from the hinged end with the drive arm 22 is fixedly connected to the drive shaft 3. When the output shaft of the drive motor 1 rotates, the eccentric cam 21 rotates eccentrically, driving the drive arm 22 and the driven arm 24 to drive the drive shaft 3 to reciprocate around the central axis of the drive shaft 3.

[0025] Preferably, the drive motor 1 is fixedly connected to a support bracket 4. The support bracket 4 is provided with a bearing seat 41. Both ends of the bearing seat 41 are coaxially provided with bearing mounting seats 42. Bearings 43 are installed in the bearing mounting seats 42. The drive shaft 3 is arranged through the bearings 43 and the bearing seat 41, and the drive shaft 3 is rotatably connected to the bearing seat 41 through the bearings 43. A brush head connecting shaft 5 is fixedly connected to one end of the drive shaft 3. The brush head connecting shaft 5 is used to connect the electric toothbrush head handle. The electric toothbrush head handle and the brush head connecting shaft 5 are detachably connected.

[0026] The drive motor 1 is a rotary motor, specifically a common brushed permanent magnet DC motor. When operating 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, resulting in low manufacturing costs. However, to achieve left-right reciprocating oscillation, it requires the cooperation of the transmission component 2 in this technical solution. While a sonic motor can directly perform left-right reciprocating oscillation, its manufacturing requires the use of relatively expensive materials such as neodymium iron boron (rare earth elements), making its cost extremely high.

[0027] In summary, by applying the transmission structure of this invention, the brushing cleaning effect that originally required a costly sonic motor can be achieved using only a low-cost rotary motor to drive the transmission component 2, significantly reducing manufacturing costs. Furthermore, during the production design phase, the power consumption and force of the drive motor 1 can be adjusted by appropriately changing the torque of the driven arm 24 according to actual application needs. For example, with the built-in battery capacity of the electric toothbrush remaining constant, extending the torque of the driven arm 24 can reduce the power consumption of the drive motor 1, effectively extending the battery life of the electric toothbrush. Alternatively, with the power consumption of the drive motor 1 remaining constant, shortening the torque of the driven arm 24 can reduce the brushing oscillation force of the electric toothbrush, while extending the torque of the driven arm 24 can increase the brushing oscillation force. This makes the product design more flexible after applying this transmission structure, ultimately significantly improving the cost-effectiveness of the electric toothbrush using this technical solution.

[0028] 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.

[0029] 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 driving a toothbrush head to swing left and right, comprising a driving motor (1), a transmission assembly (2) and a driving shaft (3), characterized in that: The transmission assembly (2) comprises an eccentric cam (21), a driving arm (22) and a driven arm (24), the driving arm (22) and the driven arm (24) are oppositely arranged and hingedly connected at both ends, the eccentric cam (21) is fixed on the output shaft of the driving motor (1), the driving arm (22) is provided with a shaft sleeve (221) at one end away from the driven arm (24), the shaft sleeve (221) is sleeved on the eccentric cam (21) in the circumferential direction and is in sliding rotation connection with the eccentric cam (21), the driven arm (24) is fixedly connected with the driving shaft (3) at one end away from the driving arm (22), when the output shaft of the driving motor (1) rotates, the eccentric cam (21) rotates eccentrically and drives the driving arm (22) and the driven arm (24) to drive the driving shaft (3) to reciprocatingly rotate around the central axis of the driving shaft (3).

2. The transmission structure for driving the head of a toothbrush to swing left and right according to claim 1, characterized in that: The driving arm (22) and the driven arm (24) are hingedly connected in series through the hinge shaft (23).

3. The transmission structure for driving the head of a toothbrush to swing left and right according to claim 1, characterized in that: The driving motor (1) is fixedly connected with a bearing support (4), the bearing support (4) is provided with a shaft seat (41), the driving shaft (3) penetrates through the shaft seat (41) and is in rotation connection with the shaft seat (41).

4. The transmission structure for driving the oscillation of the toothbrush head according to claim 1 or 3, characterized in that: The driving motor (1) is a rotary motor.

5. The transmission structure for driving the head of a toothbrush to swing left and right according to claim 3, characterized in that: The shaft seat (41) is coaxially provided with a bearing mounting seat (42) at both opposite ends, the bearing mounting seat (42) is provided with a bearing (43), the driving shaft (3) penetrates through the bearing (43) and is in rotation connection with the shaft seat (41) through the bearing (43).

6. The transmission structure for driving the oscillation of the brush head according to any one of claims 1, 3, 5, characterized in that: One end of the driving shaft (3) is fixedly connected with a brush head connecting shaft (5), the brush head connecting shaft (5) is used for connecting an electric toothbrush brush head handle.

7. The transmission structure for driving the oscillation of the toothbrush head according to claim 6, characterized in that: The electric toothbrush brush head handle is detachably connected with the brush head connecting shaft (5).

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