Swing electric toothbrush rod having protective device

Abstract

A swing electric toothbrush rod having a protective device capable of being mounted on an electric toothbrush. The swing electric toothbrush rod comprises a brush rod housing (51), an inner support (56), a swing brush head assembly (52), and a swing power transmission assembly. The rear end of the brush rod housing (51) is detachably connected to the electric toothbrush. The swing brush head assembly (52) is arranged at the front end of the brush rod housing (51). The rear end of the swing power transmission assembly is connected to an output shaft (245) of a swing motor (20) of the electric toothbrush, and the front end is connected to the swing brush head assembly (52), so as to transmit the output power of the swing motor (20) to the swing brush head assembly (52). A brush head protective cap accommodating a brush rod head (521) extends from the front end of the brush rod housing (51). The brush head protective cap and the moving brush rod head (521) maintain a spacing (G) so as to ensure that the swinging brush head does not rub against the cap edge of the front section of the brush rod housing (51). Thus, discomfort to a user caused by high-speed friction and impact is avoided, power loss is reduced, and the swing output efficiency is improved.

Description

Swinging electric toothbrush handle with protective device Technical Field

[0001] This invention relates to the technical field of electric toothbrush handles, and more particularly to a vibrating electric toothbrush handle with a protective device. Background Technology

[0002] Electric toothbrush heads can be divided into two main categories based on their operating mechanism: one is a rotating brush head, and the other is a vibrating brush head. This invention falls under the design scope of vibrating brush heads.

[0003] Traditional vibrating toothbrush handles have a relatively simple design. The handle and the power source are basically rigidly connected, and the brush head at the end of the handle is directly fitted with bristles. Under the action of high-frequency power, the entire handle and brush bristles vibrate together. The technical feature of conventional vibrating toothbrush handles is that the brush head and handle are integrated. The brush head can be designed in shapes such as ellipse, circle, rectangle, triangle, trapezoid, etc., depending on the actual usage requirements. In conventional designs, the power directly drives the handle and brush head, and the handle and brush head vibrate together to complete the entire cleaning process. The vibrating toothbrush handle mentioned in this invention follows traditional design principles for its brush head, but it can also be ellipse, circle, rectangle, triangle, trapezoid, etc.

[0004] The advantages of this design are its simple structure and low cost. However, it also has the following two significant disadvantages:

[0005] 1. During use, the entire brush handle is in direct contact with the oral cavity due to high-frequency vibration. The high-frequency vibration of the brush handle meets the power requirements for brushing teeth, but the surface of the brush handle and the back of the brush head inevitably come into direct contact with the inner wall of the user's oral cavity. The high-frequency vibration and friction of the brush handle on the oral cavity will cause discomfort and irritation to the user.

[0006] 2. Because the inner wall of the mouth directly contacts the vibrating brush handle, it creates resistance to the brush handle's vibration, causing energy loss and weakening the vibration. To ensure sufficient vibration intensity for good cleaning, the resistance generated by friction within the mouth must be considered during the design phase, and the power of the vibration source should be appropriately increased. This method will inevitably shorten the product's battery's sustainable discharge time.

[0007] Therefore, in view of the above-mentioned defects, the designers of this invention, through dedicated research and design, and by integrating years of experience and achievements in related industries, have researched and designed a swing-type electric toothbrush handle with a protective device to overcome the above-mentioned defects. Summary of the Invention

[0008] The purpose of this invention is to provide a oscillating electric toothbrush handle with a protective device, which can overcome the defects of the prior art, avoid discomfort caused to users by high-speed friction and impact, reduce power loss, and improve oscillating output efficiency.

[0009] To achieve the above objectives, this invention discloses a vibrating electric toothbrush handle with a protective device, which can be mounted on an electric toothbrush. The electric toothbrush includes a main body housing, a vibrating motor, and a battery. The vibrating motor is located at the front end of the internal space of the main body housing. The output shaft of the vibrating motor extends from the front end of the main body housing and connects to the vibrating electric toothbrush handle located at the front of the main body housing. The battery is located at the rear end of the internal space. The invention is characterized by:

[0010] The oscillating electric toothbrush handle includes a brush handle housing, an internal support, an oscillating brush head assembly, and an oscillating power transmission assembly. The rear end of the brush handle housing is detachably connected to the electric toothbrush. The brush handle housing is hollow in the shape of a horn, and its rear part accommodates an internal support that is also hollow in the shape of a horn, thus forming an internal space for the built-in oscillating power transmission assembly. The oscillating brush head assembly is located at the front end of the brush handle housing. The rear end of the oscillating power transmission assembly is connected to the output shaft of the oscillating motor of the electric toothbrush, and the front end is connected to the oscillating brush head assembly, thereby transmitting the output power of the oscillating motor to the oscillating brush head assembly.

[0011] The oscillating brush head assembly includes a brush head, a rotating shaft, a bristle tuft seat, and oscillating brush bristles. The rear end of the brush head extends into the front end of the brush head housing and is rotatably fixed to the internal support via the rotating shaft. The front end of the brush head is fixed with a bristle tuft seat, and the bristle tuft seat is fitted with multiple oscillating brush bristles for cleaning.

[0012] Wherein: the brush head is provided with a shaft hole through which the rotating shaft rotates, and the two ends of the rotating shaft extend into the internal bracket, thereby forming the swing fulcrum of the brush head.

[0013] Wherein: the pendulum vibration power transmission component includes a pendulum shaft and a coupling assembly, the front end of the pendulum shaft is embedded in the concave hole at the rear end of the brush head, and the rear end is connected to the coupling assembly as the output power coupling point.

[0014] Wherein: the coupling assembly includes a coupling block and a connecting pipe, the swing shaft extends into the front end of the connecting pipe, and the rear end of the connecting pipe is connected to the output shaft of the swing motor of the electric toothbrush through the coupling block.

[0015] Wherein: the concave hole at the rear end of the brush head is perpendicular to the swing axis.

[0016] Wherein: the coupling assembly adopts an elastic coupling structure, which consists of a trumpet-shaped connecting pipe and a coupling block inside the connecting pipe. The coupling block is an elastic body with a through hole, and the output shaft of the oscillating motor is fitted into the elastic body.

[0017] Wherein: the coupling block is a hollow sleeve, and its middle part is provided with a concave inner ring protrusion.

[0018] Wherein: the front end of the brush rod housing extends into a brush head protective cap to accommodate the brush head, and the brush head protective cap and the moving brush head maintain a distance to ensure that the swinging brush head does not rub against the edge of the cap at the front end of the brush rod housing.

[0019] Wherein: the brush head protective cap is a cap-shaped tongue that partially encloses the brush head to enclose the brush handle head and provide space for movement.

[0020] As can be seen from the above, the vibrating electric toothbrush handle with a protective device of the present invention has the following effects:

[0021] 1. The brush handle housing encloses the moving brush head and swing shaft, effectively reducing the discomfort caused to the user by direct contact between the brush head and the human mouth and high-speed friction and impact. It also effectively reduces the power loss caused by direct contact between the brush head and the human body, and improves the swing output efficiency.

[0022] 2. The brush head protective cap and the moving brush head maintain a distance G. This distance ensures that the oscillating brush head does not rub against the cap edge at the front of the brush head housing, and ensures that all high-speed moving parts work within the housing. This solves the discomfort caused by the direct contact between the inner wall of the mouth and the high-frequency oscillating brush head during use of conventional oscillating brush heads. This shockproof protective cover effectively solves the above two defects of traditional oscillating toothbrush handles.

[0023] The details of this invention will become apparent from the following description and the accompanying drawings. Attached Figure Description

[0024] Figure 1 shows an overall schematic diagram of the oscillating electric toothbrush handle with protective device according to the present invention.

[0025] Figure 2 shows a schematic diagram of the oscillating electric toothbrush arm with protective device of the present invention being installed on the electric toothbrush.

[0026] Figure 3 shows a schematic diagram of the internal structure of the oscillating electric toothbrush handle with protective device of the present invention.

[0027] Figure 4 shows an exploded view of the oscillating electric toothbrush handle with a protective device according to the present invention.

[0028] Figure 5 shows a schematic diagram of the gap in the swing electric toothbrush handle with protective device of the present invention.

[0029] Figures 6A, 6B, and 6C show schematic diagrams of the operation of the oscillating electric toothbrush handle with protective device of the present invention.

[0030] Figures 7A and 7B show schematic diagrams of the operation in which the output shaft's motion trajectory is an arc-shaped circle in this invention.

[0031] Figures 8A and 8B show schematic diagrams of the operation in which the output shaft's motion trajectory is a reciprocating parallel line in this invention.

[0032] Reference numerals: 10. Main body housing; 11. Tail cap; 12. Function button; 13. Control circuit board; 20. Swing motor; 245. Output shaft; 51. Brush rod housing; 521. Brush rod head; 522. Rotation shaft; 523. Bristle holder; 524. Swing brush bristles; 53. Swing shaft; 54. Coupling block; 55. Connecting pipe; 56. Internal support; 57. Compensation pad. Detailed Implementation

[0033] Referring to Figures 1 to 5, the present invention shows a oscillating electric toothbrush handle with a protective device. Figure 1 shows an overall external schematic diagram of the oscillating electric toothbrush handle with a protective device of the present invention. Figure 2 shows a structural schematic diagram of the oscillating electric toothbrush handle with a protective device of the present invention installed on an electric toothbrush. Figure 3 shows an internal structural schematic diagram of the oscillating electric toothbrush handle with a protective device of the present invention. Figure 4 shows an exploded schematic diagram of the oscillating electric toothbrush handle with a protective device of the present invention. Figure 5 shows a gap schematic diagram of the oscillating electric toothbrush handle with a protective device of the present invention.

[0034] As shown in Figures 1 and 2, the vibrating electric toothbrush handle with protective device can be installed on an electric toothbrush. The electric toothbrush includes at least a main body housing 10, a vibrating motor 20, and a battery 30. The main body housing 10 is hollow to form an internal space, and its rear end is closed by a detachable tail cap 11. The main body housing 10 contains a control circuit board 13, and multiple function buttons 12 connected to the control circuit board 13 are provided on the side wall. Thus, the operator can provide control signals to the control circuit board 13 through the function buttons 12 to control the electric toothbrush.

[0035] The front end of the built-in space of the main body housing 10 is provided with a oscillating motor 20. The output shaft 245 of the oscillating motor 20 extends from the front end of the main body housing 10 and is connected to the oscillating electric toothbrush rod located in front of the main body housing 10 to provide power output for the oscillating electric toothbrush rod. The rear end of the built-in space is provided with a battery 30. The battery 30 is electrically connected to the control circuit board 13 and the oscillating motor 20 to provide stable and reliable power output for both.

[0036] As shown in the internal sectional view of Figure 3 and the exploded view of Figure 4, the oscillating electric toothbrush handle with protective device of the present invention includes a brush handle housing 51, an internal support 56, an oscillating brush head assembly 52, and an oscillating power transmission assembly. The rear end of the brush handle housing 51 is detachably connected to the electric toothbrush, and more specifically, to the front end of the main body housing of the electric toothbrush. The brush handle housing 51 is formed in a hollow, flared shape, and its rear part contains an internal support 56, which is also hollow and flared, thereby forming an internal space for the built-in oscillating power transmission assembly. The oscillating brush head assembly 52 is disposed at the front end of the brush handle housing 51. The rear end of the oscillating power transmission assembly is connected to the output shaft 245 of the oscillating motor 20 of the electric toothbrush, and the front end is connected to the oscillating brush head assembly 52, thereby transmitting the output power of the oscillating motor 20 to the oscillating brush head assembly 52.

[0037] The oscillating brush head assembly 52 includes a brush head 521, a rotating shaft 522, a bristle tuft seat 523, and oscillating bristles 524. The rear end of the brush head 521 extends into the front end of the brush head housing 51 and is rotatably fixed to the internal support 56 via the rotating shaft 522. The front end of the brush head 521 is fixed with a bristle tuft seat 523, and the bristle tuft seat 523 is fitted with multiple oscillating bristles 524 for cleaning.

[0038] The brush head 521 is provided with a shaft hole through which the rotating shaft 522 rotates. Both ends of the rotating shaft 522 are fixedly inserted into the internal bracket 56, thereby forming the swing fulcrum of the brush head.

[0039] The oscillating vibration power transmission assembly includes a oscillating shaft 53 and a coupling assembly. The front end of the oscillating shaft 53 is embedded in a recessed hole at the rear end of the brush head 521, and the rear end is connected to the coupling assembly, which serves as the output power coupling point. The power drives the coupling point to oscillate in an oscillating manner. The coupling assembly includes a coupling block 54 and a connecting pipe 55. The oscillating shaft 53 extends into the front end of the connecting pipe 55, and the rear end of the connecting pipe 55 is connected to the output shaft 245 of the oscillating vibration motor 20 of the electric toothbrush through the coupling block 54.

[0040] The coupling block 54 is made of an elastic material and serves as the passive end, while the connecting pipe 55 is made of a rigid material and serves as the active end.

[0041] As shown in Figures 7A and 7B, Figure 7A is a schematic diagram of the output shaft in a stationary state, and Figure 7B is a schematic diagram of the output shaft swinging left and right. The output shaft swings around the origin O, P1 and P2 are the extreme positions of the two ends that can swing, A is the maximum angle that can swing, and B represents the arc-shaped motion trajectory formed by the coupling point under the swing. Thus, the motion trajectory of the power coupling point (output shaft) at the rear end of the swing shaft 53 is an arc circle, which coincides with the rotation center.

[0042] As shown in Figures 8A and 8B, Figure 8A is a schematic diagram of the output shaft in a stationary state, and Figure 8B shows a schematic diagram of the output shaft swinging left and right. In the figure, the output shaft moves in parallel motion, not in an arc-shaped rotation, which is another example of the oscillating motor mentioned in this invention. Whether the motor shaft swings or oscillates in parallel, it can meet the requirements of the toothbrush head driving power source mentioned in this invention. P1 and P2 are the extreme positions of parallel oscillation, and D is the stroke of the oscillation.

[0043] It is obvious that the motion trajectory of the coupling point between the motor output and the toothbrush shaft in this method is such that the parallel line of this reciprocating transformation is perpendicular to the axis of the toothbrush body.

[0044] The concave hole at the rear end of the brush head 521 is perpendicular to the swing shaft 53.

[0045] When the output shaft swings, the power is coupled through the coupling assembly, and the brush head 521 swings around the rotating shaft at the top of the inner bracket of the brush head. The swing of the shaft is linked to the swing of the brush head to realize the brushing process.

[0046] The swing trajectory of the output shaft can be arc-shaped or an axis perpendicular to the main body axis. Both swing modes can effectively drive the swing shaft of the brush rod.

[0047] Preferably, the coupling assembly adopts an elastic coupling structure, which consists of a trumpet-shaped connecting pipe 55 and a coupling block 54 inside the connecting pipe 55. The coupling block 54 is an elastic body with a through hole, and the output shaft of the oscillating motor is fitted into the elastic body. This special structural design solves two problems:

[0048] 1. The through-hole of the elastomer mates with the output shaft of the oscillating motor. If both the hole and shaft are rigidly coupled, wear will inevitably occur under high-frequency oscillation. The worn hole and shaft will then experience high-frequency reciprocating impacts, generating severe noise. By adopting an elastic coupling design, the reciprocating impacts generated after wear are absorbed by the elastomer itself and dissipated as heat, effectively solving the noise problem after wear.

[0049] 2. The dynamic coupling point features an elastic design. Due to the material properties of the elastomer, an interference fit between the shaft and the hole is permissible. If motion interference occurs during rotation, the elastomer can mitigate the impact of this interference through its deformable properties. A well-designed interference fit between the shaft and the hole effectively extends the brush rod's lifespan.

[0050] Therefore, the oscillating brush head assembly can be designed into shapes such as ellipse, circle, rectangle, triangle, etc., according to actual usage requirements.

[0051] The brush handle housing 51 encloses the moving brush head and swing shaft, effectively reducing the discomfort caused to the user by direct contact between the brush head and the human mouth and high-speed friction and impact. It also effectively reduces the power loss caused by direct contact between the brush head and the human body, and improves the swing output efficiency.

[0052] The axis of the rotating shaft 522 is perpendicular to the swing direction of the output shaft.

[0053] The connecting pipe 55 is a trumpet-shaped sleeve.

[0054] The coupling block 54 is a hollow sleeve with a concave annular protrusion in its middle part.

[0055] It may also be equipped with a compensation pad 57 to compensate for the swinging motion.

[0056] The front end of the brush rod housing 51 extends into a brush head protective cap to accommodate the brush head. The brush head protective cap and the moving brush head 521 maintain a distance G (as shown in Figure 5). This distance G ensures that the oscillating brush head does not rub against the edge of the cap at the front end of the brush rod housing, and ensures that all high-speed moving parts work within the housing. This solves the discomfort caused by the direct contact between the inner wall of the oral cavity and the high-frequency oscillating brush head during the use of conventional oscillating brush heads.

[0057] Preferably, the brush head protective cap is a cap-shaped tongue that partially encloses the brush head, which can better enclose the brush head and provide space for its movement.

[0058] When the output shaft swings, the power is coupled through the connecting pipe and the coupling block. The swing shaft swings and drives the brush head to swing around the pivot point. The swing of the swing shaft and the swing of the brush head together realize the brushing process.

[0059] Therefore, it is evident that conventional high-frequency oscillating toothbrush heads cause discomfort during use because the back of the oscillating brush head directly rubs against the user's oral cavity wall through impact contact. The oscillating brush handle disclosed in this invention features a cap-like brim at the front of the housing, surrounding the back of the brush head. The size of this brim is designed not to affect the maximum oscillation stroke of the brush head. This brim effectively prevents direct contact between the user's oral cavity wall and the high-frequency oscillating brush head, solving the problem of excessive stimulation from the brush head's back. The brim also effectively reduces pressure from the oral cavity wall on the moving brush head, resulting in a more stable oscillation amplitude and minimizing power loss.

[0060] It is obvious that the above description and account are merely illustrative and not intended to limit the disclosure, application, or use of this invention. Although embodiments have been described and illustrated in the accompanying drawings, the invention is not limited to the specific examples exemplified by the drawings and described in the embodiments as currently considered the best mode for carrying out the teachings of the invention. The scope of the invention will include any embodiments falling within the foregoing description and the appended claims.

Claims

1. A vibrating electric toothbrush handle with a protective device, which can be mounted on an electric toothbrush, the electric toothbrush comprising a main body housing, a vibrating motor, and a battery, wherein the vibrating motor is disposed at the front end of the internal space of the main body housing, the output shaft of the vibrating motor extends from the front end of the main body housing and is connected to the vibrating electric toothbrush handle located at the front of the main body housing, and the battery is disposed at the rear end of the internal space, characterized in that: The oscillating electric toothbrush handle includes a brush handle housing, an internal support, an oscillating brush head assembly, and an oscillating power transmission assembly. The rear end of the brush handle housing is detachably connected to the electric toothbrush. The brush handle housing is hollow in the shape of a horn, and its rear part accommodates an internal support that is also hollow in the shape of a horn, thus forming an internal space for the built-in oscillating power transmission assembly. The oscillating brush head assembly is located at the front end of the brush handle housing. The rear end of the oscillating power transmission assembly is connected to the output shaft of the oscillating motor of the electric toothbrush, and the front end is connected to the oscillating brush head assembly, thereby transmitting the output power of the oscillating motor to the oscillating brush head assembly.

2. The vibrating electric toothbrush handle with a protective device as described in claim 1, characterized in that: The oscillating brush head assembly includes a brush head, a rotating shaft, a bristle tuft seat, and oscillating brush bristles. The rear end of the brush head extends into the front end of the brush head housing and is rotatably fixed to the internal support via the rotating shaft. The front end of the brush head is fixed with a bristle tuft seat, and the bristle tuft seat is fitted with multiple oscillating brush bristles for cleaning.

3. The vibrating electric toothbrush handle with a protective device as described in claim 2, characterized in that: The brush head is provided with a shaft hole through which a rotating shaft can rotate. Both ends of the rotating shaft extend into the internal bracket, thereby forming the swing fulcrum of the brush head.

4. The vibrating electric toothbrush handle with a protective device as described in claim 2, characterized in that: The pendulum vibration power transmission assembly includes a pendulum shaft and a coupling assembly. The front end of the pendulum shaft is embedded in the recessed hole at the rear end of the brush head, and the rear end is connected to the coupling assembly as the output power coupling point.

5. The vibrating electric toothbrush handle with a protective device as described in claim 4, characterized in that: The coupling assembly includes a coupling block and a connecting pipe. The swing shaft extends into the front end of the connecting pipe, and the rear end of the connecting pipe is connected to the output shaft of the swing motor of the electric toothbrush via the coupling block.

6. The vibrating electric toothbrush handle with a protective device as described in claim 4, characterized in that: The recessed hole at the rear end of the brush head is perpendicular to the swing axis.

7. The vibrating electric toothbrush handle with a protective device as described in claim 4, characterized in that: The coupling assembly adopts an elastic coupling structure. The coupling assembly consists of a flared connecting pipe and a coupling block inside the connecting pipe. The coupling block is an elastic body with a through hole, and the output shaft of the oscillating motor is fitted into the elastic body.

8. The vibrating electric toothbrush handle with a protective device as described in claim 7, characterized in that: The coupling block is a hollow sleeve with a concave annular protrusion in its middle.

9. The vibrating electric toothbrush handle with a protective device as described in any one of claims 2-8, characterized in that: The front end of the brush rod housing extends into a brush head protective cap to accommodate the brush head. The brush head protective cap and the moving brush head maintain a distance to ensure that the swinging brush head does not rub against the edge of the cap at the front end of the brush rod housing.

10. The vibrating electric toothbrush handle with a protective device as described in claim 9, characterized in that: The brush head protective cap is a cap-shaped lip that partially encloses the brush head to contain the brush handle head and provide space for movement.

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