Electric toothbrush and driving device thereof

Abstract

The utility model belongs to the technical field of electric toothbrushes, and particularly relates to an electric toothbrush and a driving device thereof. The driving device includes: a driver; the transmission seat is fixedly connected to an output shaft of the driver, an eccentric shaft is arranged on the transmission seat, the eccentric shaft is fixedly connected to the positioning seat, and a sector gear is arranged on the outer side of the positioning seat; the gear is arranged opposite to the sector gear, and the gear is meshed with the sector gear; an output shaft of the gear is coaxially connected to the transmission shaft. The electric toothbrush comprises a machine body, a toothbrush head, a gland, a power supply and a driving device, a power supply and a control device are arranged on the machine body, and the driving device is arranged in the machine body, electrically connected to the power supply and in communication connection to the control device; the gland sleeves the periphery of the transmission shaft and is connected to the machine body; one end of the toothbrush head is connected to the transmission shaft, and the other end is clamped to the machine body. Therefore, the problems of unstable transmission, loud noise and poor tooth cleaning effect in the use process of the electric toothbrush are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric toothbrush technical field, concretely relates to a drive arrangement of electric toothbrush and use the drive arrangement of electric toothbrush. BACKGROUND

[0002] Electric toothbrush after long time use, result in transmission efficiency drop and instability, when using, can produce larger vibration and noise, not only can wear enamel, still can make gingival degeneration, tooth loose condition appears.But noise problem, in quiet environment appears especially jarring, easy to make user feel emotional tension.In addition, current electric toothbrush mainly provides fast, medium speed, slow toothbrushing mode, for some wedge shape tooth or other irregular dentition, can not play good cleaning effect.

[0003] In view of above-mentioned defect, still need to optimize and improve the structure of current electric toothbrush, thereby solve the transmission instability, loud noise and poor cleaning effect problem that electric toothbrush encountered in use process. UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of electric toothbrush and its drive device, to solve the transmission instability, loud noise and poor cleaning effect problem that electric toothbrush encountered in use process in prior art.

[0005] To achieve the above object, the utility model provides a kind of drive device of electric toothbrush, comprising:

[0006] driver;

[0007] drive base, fixedly connected to the output shaft of the driver, eccentric shaft is equipped on the drive base, the eccentric shaft is fixedly connected to positioning seat, and the outside of the positioning seat is equipped with sector gear;And

[0008] Gear, it is opposite to be provided with the sector gear, and the gear is engaged in the sector gear;The output shaft of the gear is coaxially connected to transmission shaft.

[0009] In a possible design, the positioning seat is waist-shaped.

[0010] In a possible design, the positioning seat is equipped with weight-reducing hole.

[0011] In a possible design, the thickness of the gear in axial direction is greater than the thickness of the sector gear in axial direction.

[0012] The electric toothbrush comprises a body, a toothbrush head, a cover, a power supply and the driving device; the body is provided with the power supply and a control device, the driving device is arranged in the body and electrically connected to the power supply and communicatively connected to the control device; the cover is sleeved on the outer periphery of the transmission shaft and connected to the body; one end of the toothbrush head is connected to the transmission shaft and the other end is clamped to the body.

[0013] In a possible design, the toothbrush head comprises a housing, a positioning shaft, a brush holder and a locking member, the housing is provided with a mounting groove, the part of the positioning shaft extending into the mounting groove is formed as a crankshaft, the brush holders are arranged one by one along the length direction of the positioning shaft and clamped to the crankshaft, and the brush holders are provided with a plurality of groups of bristles; the housing is provided with a locking hole matched with the locking member, the brush holders are provided with through holes, and the locking member passes through the locking hole and the through hole to lock the brush holders to the housing.

[0014] In a possible design, the area below the mounting groove is provided with a reinforcing body, and the reinforcing body is integrally injection molded with the housing.

[0015] In a possible design, the mounting surface of the brush holder is provided as a folded surface, and the folded surfaces of adjacent brush holders are inclined in different directions.

[0016] In a possible design, the cover is provided with an annular clamping table and an annular stop table, the inner wall of the housing is provided with a clamping groove matched with the clamping table and a step matched with the stop table, and the stop table is located on the side close to the driving device.

[0017] In a possible design, the electric toothbrush further comprises a cylinder seat and a transmission cylinder; the transmission shaft is provided with a cutting surface, and the positioning shaft is provided with a fitting surface; the cylinder seat is sleeved above the transmission shaft, the cylinder seat is provided with a limiting groove matched with the cutting surface in the inside, and the transmission shaft is inserted into the limiting groove; the transmission cylinder is fixedly sleeved on the outer periphery of the cylinder seat, the transmission cylinder is provided with a stop groove matched with the fitting surface in the inside, and the positioning shaft is inserted into the stop groove; when the driver rotates, the transmission shaft drives the cylinder seat to rotate, and the transmission cylinder drives the positioning shaft to rotate.

[0018] The electric toothbrush further comprises a spiral spring arranged in the housing of the toothbrush head, one end of the spiral spring is sleeved on the outer periphery of the transmission cylinder and the positioning shaft, the one end of the spiral spring abuts against the transmission cylinder, and the other end abuts against the housing of the toothbrush head.

[0019] By the above technical solution, the power source can be provided by the driver. The transmission seat is fixedly connected to the output shaft of the driver, thereby receiving the power transmitted by the driver. The eccentric shaft is arranged on the transmission seat, thereby generating a nonlinear motion. The eccentric shaft is fixedly connected to the positioning seat, thereby generating an eccentric motion by rotation, and enabling the positioning seat to generate a periodic displacement. The sector gear outside the positioning seat is engaged with the fixed gear, receives the rotary motion from the sector gear, and transmits the rotary motion to the transmission shaft, thereby converting the motion of the eccentric shaft into rotary motion. Since the transmission shaft is coaxially connected to the output shaft of the gear, the rotary motion can be finally transmitted to the toothbrush head, and a specific motion mode (such as vibration, swing, etc.) of the toothbrush head can be realized.

[0020] By the design of the eccentric shaft and the sector gear, the rotary motion of the driver can be effectively converted into a complex motion mode, and the cleaning effect can be improved. Meanwhile, the driver can also be accurately controlled in speed and torque by the control device, thereby ensuring that the motion of the toothbrush head is stable and meets the expectation. By adjusting the gear ratio and the position of the eccentric shaft, different motion modes (such as vibration, swing, rotation, etc.) can be realized, and the cleaning needs of different users can be met. Therefore, an efficient and comfortable oral cleaning experience can be provided, and the electric toothbrush is suitable for daily household use. Of course, the electric toothbrush can also be suitable for dental clinics or professional nursing institutions, and can assist medical staff to perform more delicate tooth cleaning. The entire driving device has a compact structure, is suitable for being installed in a small-sized shell of the electric toothbrush, and ensures the portability and aesthetics of the product, and has good practicability.

[0021] By the above technical solution, the user selects a working mode and starts the electric toothbrush by a button or a touch screen on the control device. The control device sends an instruction to the driving device, and the driver starts to work. The rotary motion generated by the driver is transmitted to the transmission shaft through the transmission seat, the eccentric shaft, the positioning seat, the sector gear and the gear, and finally the rotary motion is transmitted to the toothbrush head. By adjusting the position of the eccentric shaft and the gear ratio, various motion modes (such as vibration, swing, rotation, etc.) can be realized, thereby providing a more comprehensive cleaning effect. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, a brief introduction will be given to the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0023] Figure 1 is a schematic diagram of the three-dimensional structure of the electric toothbrush in an embodiment provided by the present application;

[0024] Figure 2It is the cross section structure schematic view of the electric toothbrush in an embodiment provided by the utility model.

[0025] Figure 3 It is Figure 2 The enlarged structure schematic view of part A in the figure;

[0026] Figure 4 It is Figure 2 The enlarged structure schematic view of part B in the figure;

[0027] Figure 5 It is the three-dimensional structure schematic view of the driving device of the electric toothbrush in an embodiment provided by the utility model.

[0028] In the above figure: 1 - body, 2 - toothbrush head, 21 - shell, 211 - locking hole, 22 - positioning shaft, 221 - crankshaft, 23 - bristle holder, 231 - through hole, 24 - reinforcing body, 3 - gland, 41 - cylinder base, 42 - transmission cylinder, 5 - driving device, 51 - driver, 52 - transmission seat, 53 - transmission shaft, 531 - tangent plane, 54 - positioning seat, 55 - sector gear, 56 - gear, 6 - power supply. DETAILED DESCRIPTION

[0029] The utility model will be further described below in combination with the drawings and specific embodiments. It needs to be explained here that the description of these embodiment modes is for helping to understand the utility model and does not constitute the limitation of the utility model. The specific structure and functional details disclosed in this paper are only used to describe the embodiment of the example of the utility model. However, the utility model can be embodied in many alternative forms, and should not be understood as being limited in the embodiments set forth in this paper.

[0030] According to the first aspect of the utility model, a kind of driving device of electric toothbrush is provided. Wherein, Figures 1 to 5 One of specific embodiments is shown.

[0031] Referring to Figures 1 to 5 As shown in the figure, the driving device of the electric toothbrush, including: driver 51;Transmission seat 52, fixedly connected to the output shaft of driver 51, transmission seat 52 is equipped with eccentric shaft, eccentric shaft is fixedly connected to positioning seat 54, and the outside of positioning seat 54 is equipped with sector gear 55;And gear 56, it is oppositely arranged with sector gear 55, and gear 56 is engaged in sector gear 55;The output shaft of gear 56 is coaxially connected to transmission shaft 53.

[0032] By the above technical solution, the power source can be provided by the driver 51. The transmission seat 52 is fixedly connected to the output shaft of the driver 51, thereby receiving the power transmitted by the driver 51. Since the eccentric shaft is arranged on the transmission seat 52, nonlinear motion can be generated. The eccentric shaft is fixedly connected to the positioning seat 54, so that the periodic displacement of the positioning seat 54 can be generated by the eccentric motion generated by rotation. The sector gear 55 outside the positioning seat 54 is engaged with the fixed gear 56, receives the rotary motion from the sector gear 55, and transmits the rotary motion to the transmission shaft 53, thereby converting the motion of the eccentric shaft into rotary motion. Since the transmission shaft 53 is coaxially connected to the output shaft of the gear 56, the rotary motion can be finally transmitted to the toothbrush head 2, so that the specific motion mode (such as vibration, swing, etc.) of the toothbrush head 2 can be realized.

[0033] By the design of the eccentric shaft and the sector gear 55, the rotary motion of the driver 51 can be effectively converted into a complex motion mode, and the cleaning effect can be improved. At the same time, the driver 51 can also be accurately controlled in speed and torque by the control device, so that the motion of the toothbrush head 2 is stable and meets the expectation. By adjusting the gear ratio of the gear 56 and the position of the eccentric shaft, different motion modes (such as vibration, swing, rotation, etc.) can be realized, so that the cleaning needs of different users can be met. Thus, an efficient and comfortable oral cleaning experience is provided, which is suitable for daily household use. Of course, it can also be suitable for dental clinics or professional care institutions, to assist medical staff to perform more delicate tooth cleaning. The whole driving device 5 has a compact structure, is suitable for being installed in the miniaturized shell of the electric toothbrush, and ensures the portability and aesthetics of the product, and has good practicability.

[0034] It should be noted that the driver 51 selects a small DC motor or a stepping motor with high efficiency and low noise. The transmission seat 52, the eccentric shaft and the positioning seat 54 are made of high-strength, wear-resistant engineering plastic or metal materials, so as to ensure the reliability during long-term use. The gear 56 and the sector gear 55 are made by high-precision injection molding or metal processing, so as to ensure that the tooth surface is smooth and closely engaged, and the wear and noise are reduced.

[0035] In an embodiment provided in the present disclosure, the positioning seat 54 is in a waist shape. The waist-shaped design of the positioning seat 54 can provide a larger contact area and better support, thereby enhancing the stability of the structure and reducing the shaking and noise during operation. At the same time, the waist-shaped design can also help the positioning seat 54 to better adapt to the periodic displacement generated by the eccentric shaft, so as to ensure the stable engagement of the sector gear 55 and the fixed gear 56, and the precise motion trajectory can be maintained even under high-frequency vibration. In addition, the waist-shaped design can more effectively utilize the limited space, so that the whole driving device 5 is more compact and is suitable for being installed in the miniaturized shell of the electric toothbrush.

[0036] Further, the positioning seat 54 is provided with a weight-reducing hole. The design of the weight-reducing hole can reduce the use of materials while ensuring the structural strength, thereby reducing the weight of the entire driving device 5 and making the electric toothbrush more portable and convenient to hold and operate. Meanwhile, the lighter positioning seat 54 reduces the inertia that the driver 51 needs to overcome, so that the start and stop are more rapid and stable, and the energy utilization efficiency is improved.

[0037] In the present disclosure, the weight-reducing hole is formed in a shape that matches the waist-shaped shape of the positioning seat 54, which is beneficial to ensuring the structural strength.

[0038] In the present disclosure, the thickness of the gear 56 in the axial direction is greater than the thickness of the sector gear 55 in the axial direction. The gear 56 (thicker) is arranged opposite to and engaged with the sector gear 55, receives the rotary motion from the sector gear 55, and transmits it to the transmission shaft 53. Since the gear 56 is thicker in the axial direction, it can provide higher structural strength and durability, ensuring long-term stable operation. The transmission shaft 53 is coaxially connected to the output shaft of the gear 56, and finally transmits the rotary motion to the toothbrush head 2, realizing the specific motion mode (such as vibration, swing, etc.) of the toothbrush head 2.

[0039] The thickness of the gear 56 in the axial direction is greater, which can withstand greater load and impact force, ensuring stable engagement and motion transmission under high-frequency vibration. The thicker gear 56 can provide higher structural strength, reduce the risk of wear and fatigue damage, and prolong the service life. The thicker gear 56 and the thinner sector gear 55 can also achieve more precise tooth surface contact, reducing the gap and noise during engagement. Although the gear 56 is thicker, it is located at a fixed position and does not significantly increase the volume of the entire driving device 5, still maintaining a compact structure, and in addition, can significantly improve the stability and durability of the system.

[0040] According to a second aspect of the present disclosure, an electric toothbrush is provided, Figures 1 to 5 One specific embodiment is shown.

[0041] Referring to Figures 1 to 5 As shown, the electric toothbrush includes a body 1, a toothbrush head 2, a gland 3, a power supply 6, and a driving device 5 as in the first aspect; the body 1 is provided with the power supply 6 and a control device, the driving device 5 is arranged in the body 1, and is electrically connected to the power supply 6 and communicatively connected to the control device; the gland 3 is sleeved on the outer periphery of the transmission shaft 53 and connected to the body 1; the toothbrush head 2 is connected to one end of the transmission shaft 53 and clamped to the other end of the body 1.

[0042] Specifically, the body 1 serves as the main housing of the entire electric toothbrush, accommodating internal components such as the power source 6, control device, drive device 5, etc. A waterproof design is usually adopted to ensure normal operation in a humid environment. The brush head 2 is connected to the transmission shaft 53 at one end and clamped to the body 1 at the other end, ensuring stability and replaceability. The gland 3 is sleeved on the outer periphery of the transmission shaft 53 and connected to the body 1, serving as a fixing and protection function to prevent external dirt from entering the transmission shaft 53 area while providing additional mechanical support to ensure stable operation of the transmission shaft 53. The power source 6 is arranged in the body 1 to power the entire system. At the same time, the power source 6 is designed as a rechargeable battery for convenient daily use by users. The control device is arranged in the body 1 or on the surface of the housing for controlling the working state of the driver 51 (such as starting, stopping, adjusting mode, etc.). Through the communication connection between the circuit board and the drive device 5, accurate control of the driver 51 is achieved. The drive device 5 is arranged in the body 1 to convert electrical energy into mechanical motion, driving the brush head 2 to perform specific motion modes (such as vibration, swing, rotation, etc.). The power source 6 is directly connected to the drive device 5 through a wire to provide stable power supply for it.

[0043] Through the above technical solution, the user selects the working mode and starts the electric toothbrush through the buttons or touch screen on the control device. The control device sends instructions to the drive device 5, and the driver 51 starts to work. The rotational motion generated by the driver 51 is transmitted to the transmission shaft 53 through the transmission seat 52, eccentric shaft, positioning seat 54, sector gear 55 and gear 56, and finally the rotational motion is transmitted to the brush head 2. By adjusting the position of the eccentric shaft and the gear 56 ratio, various motion modes (such as vibration, swing, rotation, etc.) can be achieved, thereby providing more comprehensive cleaning effect.

[0044] In an embodiment provided in the present disclosure, the brush head 2 comprises a shell 21, a positioning shaft 22, a plurality of bristle seats 23 and a locking member. The shell 21 is provided with a mounting groove, the positioning shaft 22 is formed as a crankshaft 221 at the part extending into the mounting groove, the bristle seats 23 are arranged one by one along the length direction of the positioning shaft 22 and clamped on the crankshaft 221, and the bristle seats 23 are provided with a plurality of groups of bristles. Based on the design of the crankshaft 221, not only the connection strength between the bristle seats 23 and the positioning shaft 22 can be enhanced, but also more flexible motion modes can be provided through the structure of the crankshaft 221, so as to ensure that the bristles can better adapt to different surfaces and angles of teeth. The shell 21 is provided with a locking hole 211 matched with the locking member, the bristle seats 23 are provided with through holes 231, and the locking member passes through the locking hole and the through holes 231 to lock the bristle seats 23 on the shell 21.

[0045] Among them, the crankshaft 221 is formed as a connecting shaft with an "arch" structure (see Figure 3As shown in the drawings, the crankshaft 221 is arranged to be able to fix the bristle holder, so as to drive the bristle holder to swing in different directions. Further, on this basis, T-shaped, L-shaped or spherical-shaped stoppers can be arranged at the bottom and top points of the crankshaft, so as to better resist or engage with the bristle holder, thereby driving the bristle holder to move accurately, reducing shaking and noise, and improving cleaning efficiency and quality.

[0046] In other embodiments, the crankshaft 221 can also be a connecting shaft arranged to extend linearly, and T-shaped, L-shaped or spherical-shaped stoppers can be arranged at intervals along the axis of the connecting shaft, and the stoppers can be arranged staggered. In this way, the stoppers can crossly resist the adjacent bristle holders 23 to swing back and forth in different directions.

[0047] In addition, the crankshaft can also be arranged in other suitable structures to stably resist the bristle holder, which is also within the technical concept of the present application.

[0048] The shell 21 serves as the outer shell of the toothbrush head 2, and has an installation groove inside, which can accommodate the positioning shaft 22 and the bristle holder 23, and is beneficial to ensure the accuracy of the installation position of the bristle holder 23. The positioning shaft 22 extends into the installation groove, which can help fix the position of the bristle holder 23, ensure that the bristle holder 23 is correspondingly arranged along its length direction, and keep the accuracy of the assembly position. Each bristle holder 23 is provided with a plurality of groups of bristles, which can provide different cleaning effects for different areas. The bristle holder 23 is provided with a through hole 231, which can be passed through by a locking member to lock the bristle holder 23. The locking member cooperates with the locking hole 211 on the shell 21, passes through the locking hole 211 and the through hole 231 on the bristle holder 23, and firmly locks the bristle holder 23 on the shell 21, so as to ensure that the bristle holder 23 will not loosen or fall off.

[0049] In the present disclosure, when replacement is needed, only the locking member needs to be loosened, and the old bristle holder 23 is removed and a new bristle holder 23 is installed. Based on the replaceable feature of the bristle holder 23, different bristle holders 23 can be selected according to needs, thereby prolonging the service life of the toothbrush head 2. Each bristle holder 23 is provided with a plurality of groups of bristles, which can provide personalized cleaning effects for different tooth areas, such as gum massage and tooth cleaning. Through the design of the locking member and the locking hole 211, it is ensured that the bristle holder 23 will not loosen or fall off during use, and a stable cleaning experience is provided.

[0050] In an embodiment provided by the present disclosure, the area below the installation groove is provided with a reinforcing body 24 which is integrally injection molded with the shell 21, so as to eliminate the potential weakness at the joint and improve the strength and durability of the overall structure. At the same time, since the reinforcing body 24 is located in the area below the installation groove, it can provide additional mechanical support to prevent the shell 21 from deforming or being damaged when subjected to force. The presence of the reinforcing body 24 makes the entire toothbrush head 2 more robust and able to withstand greater impact force and wear, prolonging the service life of the product.

[0051] It is worth mentioning that the shell 21 and the reinforcing body 24 are made of high-strength, wear-resistant and waterproof materials (such as ABS plastic) to ensure reliability and durability during long-term use.

[0052] The positioning shaft 22 is made of stainless steel or other corrosion-resistant materials to ensure that it does not rust during long-term use.

[0053] In an embodiment provided by the present disclosure, the installation surface of the bristle holder 23 is provided with a folding surface, and the folding surfaces of adjacent bristle holders 23 are inclined in different directions. The installation surface of the bristle holder 23 is provided with a folding surface, so that the bristles of each bristle holder 23 can face different directions. The folding surfaces of adjacent bristle holders 23 are inclined in different directions, which can form a multi-angle bristle layout, thereby providing diversified cleaning angles to adapt to different surfaces and angles of teeth and better clean various surfaces and gaps of teeth. At the same time, different inclination angles can adapt to different tooth shapes and arrangements of different users, so that the bristles can reach every corner of the teeth, improve the cleaning efficiency, reduce the cleaning blind area, and provide more personalized cleaning effect.

[0054] During assembly, the user can select different types of bristle holders 23 according to needs, and clamp them one by one on the positioning shaft 22 to ensure that the folding surfaces of each bristle holder 23 are correctly inclined. The bristle holder 23 is firmly locked on the shell 21 by the locking member passing through the locking hole 211 on the shell 21 and the through hole 231 on the bristle holder 23. In daily use, the bristle holder 23 can provide diversified cleaning effect; when it needs to be replaced, the user only needs to loosen the locking member, remove the old bristle holder 23 and install a new one.

[0055] In an embodiment provided by the present disclosure, the gland 3 is provided with an annular clamping table and an annular stop table, and the inner wall of the shell 21 is provided with a clamping groove matched with the clamping table and a step matched with the stop table, wherein the stop table is located on the side close to the driving device 5. The gland 3 is sleeved on the outer periphery of the transmission shaft 53, and the clamping table is aligned with the clamping groove in the shell 21, and is gently pressed in until the stop table contacts with the step in the shell 21. To ensure that the gland 3 is completely clamped in place, whether it is firmly installed can be confirmed by slightly rotating or tapping.

[0056] The cooperation of the clamping platform and the clamping groove ensures the tight connection between the gland 3 and the shell 21, preventing loosening or falling off. The design of the clamping platform and the stop platform provides a double sealing effect, ensuring that the internal components are not affected by external dirt. The cooperation of the stop platform and the step ensures that the gland 3 will not be excessively pressed into the interior of the shell 21, providing additional mechanical support and enhancing overall stability. The quick cooperation of the clamping platform and the clamping groove simplifies the assembly process and improves production efficiency.

[0057] In an embodiment provided by the present disclosure, the electric toothbrush further comprises a cylinder seat 41 and a transmission cylinder 42; the transmission shaft 53 is provided with a cutting surface 531, and the positioning shaft 22 is provided with a fitting surface; the cylinder seat 41 is sleeved above the transmission shaft 53, and the cylinder seat 41 is provided with a limiting groove matched with the cutting surface 531 in the inside, and the transmission shaft 53 is inserted into the limiting groove; the transmission cylinder 42 is fixedly sleeved outside the cylinder seat 41, and the transmission cylinder 42 is provided with a stop groove matched with the fitting surface in the inside, and the positioning shaft 22 is inserted into the stop groove; when the driver 51 rotates, the transmission shaft 53 drives the cylinder seat 41 to rotate, and the transmission cylinder 42 drives the positioning shaft 22 to rotate.

[0058] The transmission shaft 53 is provided with a cutting surface 531, which cooperates with the limiting groove in the cylinder seat 41 to ensure the tight connection between the transmission shaft 53 and the cylinder seat 41. The positioning shaft 22 is provided with a fitting surface, which cooperates with the stop groove in the transmission cylinder 42 to ensure the tight connection between the positioning shaft 22 and the transmission cylinder 42. The cylinder seat 41 is sleeved above the transmission shaft 53 and is provided with a limiting groove matched with the cutting surface 531 of the transmission shaft 53 in the inside.

[0059] The cooperation of the cutting surface 531 and the limiting groove ensures the tight connection between the transmission shaft 53 and the cylinder seat 41, so that they can rotate synchronously. The cooperation of the fitting surface and the stop groove ensures the tight connection between the positioning shaft 22 and the transmission cylinder 42, so that they can rotate synchronously. The multi-stage connection of the transmission shaft 53, the cylinder seat 41, the transmission cylinder 42 and the positioning shaft 22 ensures the stability and reliability of the entire transmission system. The precise cooperation of the cutting surface 531 and the limiting groove, and the fitting surface and the stop groove reduces the friction between the components, prolonging the service life. The quick cooperation of the limiting groove and the stop groove simplifies the assembly process and improves production efficiency. The design of the transmission cylinder 42 and the cylinder seat 41 provides additional mechanical support and sealing performance, preventing external dirt from entering the transmission system.

[0060] When the transmission shaft 53 rotates, the cylinder seat 41 also rotates. The transmission cylinder 42 is fixedly sleeved outside the cylinder seat 41 and is provided with a stop groove matched with the fitting surface of the positioning shaft 22 in the inside. When the cylinder seat 41 rotates, the transmission cylinder 42 drives the positioning shaft 22 to rotate together. The driver 51 is arranged in the body 1, electrically connected to the power supply 6, and communicatively connected to the control device. The electrical energy is converted into mechanical motion to drive the transmission shaft 53 to perform specific motion modes (such as vibration, swing, rotation, etc.).

[0061] The user starts the driver 51 through the control device, and the driver 51 generates a rotating motion. The rotating motion of the driver 51 is transmitted to the cylinder seat 41 through the transmission shaft 53, and the tangent surface 531 on the transmission shaft 53 is matched with the limiting groove in the cylinder seat 41 to ensure synchronous rotation of the two. The cylinder seat 41 rotates together with the transmission shaft 53. The transmission cylinder 42 is fixedly sleeved on the outer periphery of the cylinder seat 41, and the stop groove in the transmission cylinder 42 is matched with the abutting surface on the positioning shaft 22 to ensure that the transmission cylinder 42 drives the positioning shaft 22 to rotate together. The rotation of the positioning shaft 22 is transmitted to the toothbrush head 2 through the bristle holder 23 to realize a specific motion mode (such as vibration, swing, rotation, etc.) of the toothbrush head 2.

[0062] The transmission shaft 53 and the positioning shaft 22 are made of high-strength, wear-resistant and corrosion-resistant materials (such as stainless steel or aluminum alloy) to ensure reliability and durability during long-term use.

[0063] The cylinder seat 41 and the transmission cylinder 42 are made of high-strength, wear-resistant and waterproof materials (such as ABS plastic or engineering plastic) to ensure reliability and durability during long-term use.

[0064] For other structures not described in detail in the text, such as sealing structures or connection structures and methods of the control device and the keys, they can be improved in a conventional manner by referring to the setting method and control principle of the electric toothbrush in the prior art, thereby obtaining an electric toothbrush.

[0065] Further, the electric toothbrush further comprises a spiral spring arranged in the housing of the toothbrush head, one end of the spiral spring is sleeved on the outer periphery of the transmission cylinder and the positioning shaft, and the other end of the spiral spring is pressed against the transmission cylinder and the housing of the toothbrush head.

[0066] Based on the elastic force of the spiral spring, the transmission cylinder can be tightly pressed against the cylinder seat, so that the motion of the toothbrush head is more stable through the buffering and supporting effect of the spiral spring, thereby optimizing the cleaning effect, especially when dealing with uneven places on the tooth surface. In this way, the transmission system can be provided with buffering and support, and the stability of the toothbrush head is enhanced, especially at high speed, so that the toothbrush head can quickly respond to the change of the user's pressure, providing a more flexible and comfortable cleaning experience.

[0067] Specifically, the control device is configured as a single-chip microcomputer.

[0068] In addition, the control device can also be configured as a PLC logic control device, a central processing unit (CPU). In other embodiments, the control device can also be one of a digital signal processor (DSP), an application specific integrated circuit (ASIC), or a field-programmable gate array (FPGA).

[0069] Finally, it should be noted that the utility model is not limited to the above-mentioned optional embodiments, and anyone can derive other various forms of products under the inspiration of the utility model. The above specific embodiments should not be understood as limiting the protection scope of the utility model, and the protection scope of the utility model should be defined in the claims, and the specification can be used to explain the claims.

Claims

1. A drive device of an electric toothbrush, characterized by comprising: The utility model relates to a drive device for electric toothbrush, comprising: a driver; a transmission seat fixedly connected to the output shaft of the driver, the transmission seat being provided with an eccentric shaft fixedly connected to a positioning seat, and the outer side of the positioning seat being provided with a sector gear; and a gear arranged opposite to the sector gear and engaged with the sector gear, the output shaft of the gear being coaxially connected to a transmission shaft.

2. The drive device of the electric toothbrush according to claim 1, characterized in that The positioning seat is in the shape of a waist.

3. The drive device of the electric toothbrush according to claim 1, wherein The positioning seat is provided with a weight-reducing hole.

4. The drive device of the electric toothbrush according to claim 1, wherein The thickness of the gear in the axial direction is greater than the thickness of the sector gear in the axial direction.

5. An electric toothbrush characterized by comprising: The utility model relates to an electric toothbrush, comprising a body, a toothbrush head, a gland, a power supply and a drive device as claimed in any one of claims 1-4; the body is provided with a power supply and a control device, the drive device is arranged in the body and electrically connected to the power supply and communicatively connected to the control device; the gland is sleeved on the outer periphery of the transmission shaft and connected to the body; one end of the toothbrush head is connected to the transmission shaft and the other end is clamped to the body.

6. The electric toothbrush according to claim 5, wherein The toothbrush head comprises a shell, a positioning shaft, a bristle holder and a locking member, the shell is provided with a mounting groove, the part of the positioning shaft extending into the mounting groove is formed as a crankshaft, the bristle holders are arranged one by one along the length direction of the positioning shaft and clamped to the crankshaft, and each bristle holder is provided with a plurality of bristles; the shell is provided with a locking hole matched with the locking member, the bristle holder is provided with a through hole, and the locking member passes through the locking hole and the through hole to lock the bristle holder to the shell.

7. The electric toothbrush according to claim 6, characterized in that The area below the mounting groove is provided with a reinforcing body which is integrally injection molded with the shell.

8. The electric toothbrush according to claim 6, wherein The mounting surface of the bristle holder is provided as a folded surface, and the inclined directions of the folded surfaces of adjacent bristle holders are different.

9. The electric toothbrush according to claim 6, wherein The gland is provided with an annular clamping table and an annular stop table, the inner wall of the shell is provided with a clamping groove matched with the clamping table and a step matched with the stop table, and the stop table is located on the side close to the drive device.

10. The electric toothbrush according to claim 6, wherein The electric toothbrush further comprises a cylinder seat and a transmission cylinder; the transmission shaft is provided with a cutting surface, and the positioning shaft is provided with a matching surface; the cylinder seat is sleeved above the transmission shaft, the cylinder seat is provided with a limiting groove matched with the cutting surface in the inside, and the transmission shaft is inserted into the limiting groove; the transmission cylinder is fixedly sleeved on the outer periphery of the cylinder seat, the transmission cylinder is provided with a stop groove matched with the matching surface in the inside, and the positioning shaft is inserted into the stop groove; when the driver rotates, the transmission shaft drives the cylinder seat to rotate, and the transmission cylinder drives the positioning shaft to rotate. The electric toothbrush further comprises a spiral spring arranged in the shell of the toothbrush head, one end of the spiral spring is sleeved on the outer periphery of the transmission cylinder and the positioning shaft, the other end of the spiral spring is pressed against the transmission cylinder, and the other end is pressed against the shell of the toothbrush head.

Images