Shock electric toothbrush rod with protective device
By designing protective devices and elastic coupling structures in the electric toothbrush rod, the discomfort and power loss caused by high-frequency vibration of the traditional electric toothbrush rod is solved, achieving a more efficient oscillation and vibration output and a better user experience.
Patent Information
- Application Number
- CN202421592128.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-08
AI Technical Summary
During use of traditional electric toothbrush rods, the high-frequency vibration of the brush rod will directly contact the inner wall of the oral cavity, causing discomfort for the user, and the friction of the high-frequency vibration will cause power loss, shortening the battery's sustainable discharge aging.
A swing and shock electric toothbrush rod with protective device is designed, using a horn hollow brush rod shell and an internal bracket, combining the swing and shock brush head assembly and the swing and shock power transmission assembly, through the elastic coupling structure of the coupling assembly, the power transmission is ensured and the brush rod head is avoided from contacting the oral cavity directly.
It effectively reduces the high-speed friction and impact of the brush rod head directly contacting the oral cavity, reduces power loss, improves the oscillation output efficiency, and improves the user experience.
Smart Images
Figure CN222804374U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric toothbrush rods, in particular to a oscillating electric toothbrush rod with a protective device. Background Art
[0002] The working modes of the brush head of an electric toothbrush can be divided into two categories according to the action mode: one is a rotating mode of the brush head and the other is a mode in which the entire brush head vibrates. The utility model belongs to the design category of a vibrating brush head.
[0003] The design of a traditional vibrating toothbrush rod is relatively simple. The brush rod and the main power source are basically rigidly connected. The brush disc at the end of the brush rod is directly planted with bristles. Under the action of high-frequency power, the entire brush rod and the brush bristles vibrate together. The technical feature of a conventional oscillating brush rod is that the brush head and the brush rod are integrated, and the brush head can be designed to be elliptical, circular, rectangular, triangular, trapezoidal, etc. according to actual use requirements. The conventional design is that the power directly drives the brush rod and the brush head, and the brush rod and the brush head vibrate together to complete the entire cleaning process. The brush head part of the oscillating brush rod mentioned in the utility model follows traditional design principles and can also be elliptical, circular, rectangular, triangular, trapezoidal, etc.
[0004] The advantages of this design are simple structure and low cost. However, it also has the following two significant disadvantages:
[0005] 1. During use, the oral cavity is in direct contact with the entire brush rod which vibrates at high frequency. The high-frequency vibration of the brush rod meets the power requirement for brushing and cleaning. However, the surface of the brush rod handle and the back of the brush head inevitably come into direct contact with the inner wall of the oral cavity of the user. The high-frequency vibration and friction of the brush rod on the oral cavity will cause discomfort and irritation to the user.
[0006] 2. The inner wall of the oral cavity directly contacts the vibrating brush rod, which creates resistance to the vibration of the brush rod, causing the brush rod to lose its vibration energy and weaken the vibration. In order to ensure the vibration intensity for a good cleaning effect, the resistance factor caused by the friction of the oral cavity must be taken into account during the design, and the power of the vibration source must be appropriately increased. This method will inevitably shorten the product's battery sustainable discharge time performance.
[0007] Therefore, the designer of the utility model has designed a oscillating electric toothbrush rod with a protective device in view of the above defects through intensive research and design, and combined with the experience and achievements of long-term engagement in related industries for many years to overcome the above defects. Utility Model Content
[0008] The purpose of the utility model is to provide a oscillating electric toothbrush rod with a protective device, which can overcome the defects of the prior art, avoid the discomfort caused to the user by high-speed friction and impact, reduce power loss, and improve the oscillating output efficiency.
[0009] To achieve the above-mentioned purpose, the utility model discloses a swing electric toothbrush rod with a protective device, which can be installed on an electric toothbrush. The electric toothbrush comprises a body shell, a swing motor and a battery. The front end of the built-in space of the body shell is provided with a swing motor. The output shaft of the swing motor extends from the front end of the body shell and is connected to the swing electric toothbrush rod located in front of the body shell. The rear end of the built-in space is provided with a battery. The utility model is characterized in that:
[0010] The oscillating electric toothbrush rod comprises a brush rod shell, an internal bracket, an oscillating brush head assembly and an oscillating force transmission assembly. The rear end of the brush rod shell is detachably connected to the electric toothbrush. The brush rod shell is hollow in the shape of a horn, and its rear portion accommodates an internal bracket which is also hollow in the shape of a horn, thereby forming an inner space for a built-in oscillating force transmission assembly. The oscillating brush head assembly is arranged at the front end of the brush rod shell, the rear end of the oscillating force 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] Wherein: the oscillating brush head assembly includes a brush rod head, a rotating shaft, a bristle bundle seat and oscillating bristles, the rear end of the brush rod head extends into the front end of the brush rod shell and is rotatably fixed to the internal bracket through the rotating shaft, the front end of the brush rod head is fixed with a bristle bundle seat, and the bristle bundle seat is planted with multiple oscillating bristles for cleaning.
[0012] Wherein: the brush rod head is provided with an axial hole for the rotating shaft to rotate through, and the two ends of the rotating shaft extend into the internal bracket to form a swing fulcrum of the brush rod head.
[0013] Wherein: the swing force transmission component includes a swing shaft and a coupling component, the front end of the swing shaft is embedded in the concave hole at the rear end of the brush rod head, and the rear end is connected to the coupling component to serve as an output power coupling point.
[0014] Wherein: the coupling assembly comprises 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 rod head is perpendicular to the swing axis.
[0016] Wherein: the coupling assembly adopts an elastic coupling structure, which is composed of a trumpet-shaped connecting pipe and a coupling block in the connecting pipe. The coupling block is an elastic body with a through hole, and the output shaft of the oscillating motor is embedded in the elastic body.
[0017] Wherein: the coupling block is a hollow sleeve, and a concave annular convex ring is arranged in the middle thereof.
[0018] Wherein: a brush head protective cap for accommodating the brush rod head extends from the front end of the brush rod housing, and the brush head protective cap and the moving brush rod head maintain a distance to ensure that the swinging brush head does not rub against the brim of the front section of the brush rod housing.
[0019] Wherein: the brush head protective cap is a cap-shaped tongue edge that half contains the brush head to contain the brush rod head and provide movement space.
[0020] From the above content, it can be known that the oscillating electric toothbrush rod with a protective device of the utility model has the following effects:
[0021] 1. The brush rod shell wraps the moving brush rod head and the swing shaft, effectively reducing the direct contact between the brush rod head and the human oral cavity. The high-speed friction and impact will cause discomfort to the user, and effectively reduce the power loss caused by the direct contact between the brush rod head and the human body, thereby improving the swing output efficiency.
[0022] 2. A distance is maintained between the brush head protective cap and the moving brush rod head. The distance G ensures that there is no friction between the swinging brush head and the brim of the front section of the brush rod housing, and ensures that all high-speed moving parts work inside the housing. This solves the discomfort caused by the direct contact of the inner wall of the oral cavity with the high-frequency swinging brush head during use of a conventional oscillating brush head. This shockproof protective cover effectively solves the above two defects of the traditional oscillating toothbrush rod.
[0023] The details of the present invention can be obtained from the following description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 The overall schematic diagram of the oscillating electric toothbrush rod with a protective device of the utility model is shown.
[0025] Figure 2 A schematic diagram showing the installation of the oscillating electric toothbrush rod with a protective device of the utility model to an electric toothbrush.
[0026] Figure 3 A schematic diagram showing the internal structure of the oscillating electric toothbrush rod with a protective device in the utility model is shown.
[0027] Figure 4 The exploded schematic diagram of the oscillating electric toothbrush rod with a protective device in the utility model is shown.
[0028] Figure 5 A schematic diagram showing the gap of the oscillating electric toothbrush rod with a protective device in the utility model is shown.
[0029] Fig. 6A , Figure 6B and Figure 6C The schematic diagram of the action of the oscillating electric toothbrush rod with the protective device in the utility model is shown.
[0030] Fig. 7A and Figure 7B The schematic diagram shows that the motion trajectory of the output shaft in the utility model is an arc circle.
[0031] Fig. 8A and Figure 8B The schematic diagram shows that the motion trajectory of the output shaft in the utility model is a reciprocating parallel line.
[0032] Reference numerals:
[0033] 10. Main body shell; 11. Tail cover; 12. Function button; 13. Control circuit board; 20. Oscillating motor; 245. Output shaft; 51. Brush rod shell; 521. Brush rod head; 522. Rotating shaft; 523. Bristle seat; 524. Oscillating bristles; 53. Oscillating shaft; 54. Coupling block; 55. Connecting pipe; 56. Internal bracket; 57 Compensating pad. DETAILED DESCRIPTION
[0034] See also Figures 1 to 5 , showing the utility model of the oscillating electric toothbrush rod with a protective device, wherein Figure 1 The overall external schematic diagram of the oscillating electric toothbrush rod with a protective device of the utility model is shown. Figure 2 The utility model shows a schematic diagram of the structure of the oscillating electric toothbrush rod with a protective device installed on the electric toothbrush. Figure 3 It shows the internal structure of the swing electric toothbrush rod with a protective device in the utility model. Figure 4 The exploded schematic diagram of the oscillating electric toothbrush rod with a protective device of the utility model is shown. Figure 5 A schematic diagram showing the gap of the oscillating electric toothbrush rod with a protective device in the utility model is shown.
[0035] like Figure 1 and Figure 2 As shown, the oscillating electric toothbrush rod with a protective device can be installed on an electric toothbrush, which at least includes a main body shell 10, an oscillating motor 20 and a battery 30. The main body shell 10 is hollow to form a built-in space, and its rear end is closed by a detachable tail cover 11. The main body shell 10 contains a control circuit board 13 and has a plurality of function buttons 12 connected to the control circuit board 13 on the side wall, so that the operator can provide a control signal to the control circuit board 13 through the function button 12 to achieve the purpose of controlling the electric toothbrush.
[0036] A oscillating motor 20 is provided at the front end of the built-in space of the main body shell 10, and the output shaft 245 of the oscillating motor 20 extends from the front end of the main body shell 10 and is connected to the oscillating electric toothbrush rod located in front of the main body shell 10 to provide power output for the oscillating electric toothbrush rod. A battery 30 is provided at the rear end of the built-in space, and 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.
[0037] exist Figure 3 Internal cross-sectional view and Figure 4 As can be seen from the exploded schematic diagram, the oscillating electric toothbrush rod with a protective device in the utility model comprises a brush rod shell 51, an internal bracket 56, an oscillating brush head assembly 52 and an oscillating force transmission assembly. The rear end of the brush rod shell 51 is detachably connected to the electric toothbrush, more specifically to the front end of the main body shell of the electric toothbrush. The brush rod shell 51 is formed into a hollow horn shape, and the rear part thereof is provided with an internal bracket 56 which is also hollow horn-shaped, thereby forming an inner space for a built-in oscillating force transmission assembly. The oscillating brush head assembly 52 is arranged at the front end of the brush rod shell 51, and the rear end of the oscillating force 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.
[0038] Among them, the oscillating brush head assembly 52 includes a brush rod head 521, a rotating shaft 522, a bristle seat 523 and oscillating bristles 524. The rear end of the brush rod head 521 extends into the front end of the brush rod shell 51 and is rotatably fixed to the internal bracket 56 through the rotating shaft 522. The front end of the brush rod head 521 is fixed with a bristle seat 523, and the bristle seat 523 is implanted with multiple oscillating bristles 524 for cleaning.
[0039] The brush rod head 521 is provided with an axial hole for the rotating shaft 522 to rotate through, and both ends of the rotating shaft 522 are fixedly extended into the internal bracket 56, thereby forming a swing fulcrum for the brush rod head.
[0040] The swing force transmission component includes a swing shaft 53 and a coupling component. The front end of the swing shaft 53 is embedded in the recessed hole at the rear end of the brush rod head 521, and the rear end is connected to the coupling component, which serves as an output power coupling point. The power drives the coupling point to swing in a swinging manner. The coupling component includes a coupling block 54 and a connecting tube 55. The swing shaft 53 extends into the front end of the connecting tube 55, and the rear end of the connecting tube 55 is connected to the output shaft 245 of the swing motor 20 of the electric toothbrush through the coupling block 54.
[0041] The coupling block 54 is made of elastic material and serves as a passive end, and the connecting pipe 55 is made of rigid material and serves as an active end.
[0042] like Fig. 7A and Figure 7B As shown, Fig. 7A This is a schematic diagram of the output shaft being stationary. Figure 7B The schematic diagram shows the output shaft swinging left and right, and the output shaft swings around the origin O, P1 and P2 are the extreme swingable positions at both ends, A is the maximum swingable angle, and B represents the arc-shaped motion trajectory formed by the coupling point under the swing. Therefore, 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 center of rotation.
[0043] Among them, Fig. 8A and Figure 8B As shown, Fig. 8A This is a schematic diagram of the output shaft being stationary. Figure 8B The schematic diagram shows the output shaft swinging left and right. The output shaft in the figure moves in parallel, not in arc swing, which is another example of the oscillating motor mentioned in the utility model. Whether the motor shaft swings or swings in parallel, it can meet the requirements of the toothbrush head driving power source mentioned in the utility model. P1 and P2 are the extreme positions of parallel swinging, and D is the swinging stroke.
[0044] Obviously, in this mode, the coupling point motion trajectory of the motor output toothbrush shaft and the parallel lines of this reciprocating transformation are perpendicular to the axis of the toothbrush body.
[0045] The concave hole at the rear end of the brush rod head 521 and the swing shaft 53 are perpendicular to each other.
[0046] When the output shaft swings, the power is coupled through the coupling assembly, and the brush rod head 521 swings around the rotating shaft at the top of the brush rod inner bracket as a fulcrum. The swing of the swing shaft links the swing of the brush rod head to realize the brushing process.
[0047] The swing trajectory of the output shaft may be an arc or an axis perpendicular to the axis of the main body. Both swing modes can effectively drive the swing axis of the brush rod.
[0048] The coupling assembly preferably adopts an elastic coupling structure, which is composed of a trumpet-shaped connecting pipe 55 and a coupling block 54 in 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 embedded in the elastic body. This special structural design solves two problems:
[0049] 1. The through hole of the elastic body matches the output shaft of the oscillating motor. If the hole and the shaft are both rigidly coupled, wear will inevitably occur under the action of high-frequency swing. The worn hole and the shaft match, and the high-frequency reciprocating impact will produce severe noise. After adopting the elastic coupling design, the reciprocating impact generated after wear is absorbed by the elastic body itself and converted into heat energy for dissipation, effectively solving the noise problem after wear.
[0050] 2. The elastic design of the dynamic coupling point allows for a reasonable interference fit between the shaft and the hole due to the material properties of the elastic body itself. If there is motion interference in the swinging process, the elastic body can rely on its own deformable properties to alleviate the impact of motion interference. Reasonable interference design between the shaft and the hole can effectively increase the service life of the brush rod.
[0051] Therefore, the oscillating brush head assembly can be designed into shapes such as ellipse, circle, rectangle, triangle, etc. according to actual usage requirements.
[0052] Among them, the brush rod shell 51 wraps the moving brush rod head and the swing shaft, effectively reducing the direct contact of the brush rod head with the human mouth, and the discomfort caused to the user by high-speed friction and impact, and effectively reducing the power loss caused by the direct contact of the brush rod head with the human body, thereby improving the swing output efficiency.
[0053] The axial direction of the rotating shaft 522 is perpendicular to the swinging direction of the output shaft.
[0054] The connecting pipe 55 is a trumpet-shaped sleeve.
[0055] The coupling block 54 is a hollow sleeve, and a concave annular convex ring is provided in the middle thereof.
[0056] A compensation pad 57 may also be provided to compensate for the swinging motion.
[0057] Wherein, a brush head protective cap for accommodating the brush rod head extends from the front end of the brush rod housing 51, and the brush head protective cap and the moving brush rod head 521 maintain a distance G (such as Figure 5 The spacing G ensures that there is no friction between the oscillating brush head and the brim of the front section of the brush rod housing, and ensures that all high-speed moving parts work inside the housing, thereby solving the discomfort caused by direct contact of the inner wall of the oral cavity with the high-frequency oscillating brush head during use of a conventional oscillating brush head.
[0058] Preferably, the brush head protective cap is a cap-shaped tongue edge that half encompasses the brush head, which can better accommodate the brush rod head and provide space for its movement.
[0059] When the output shaft swings, power is coupled through the connecting pipe and the coupling block, the swing shaft swings and drives the brush rod head to swing around the rotating shaft as a fulcrum. The swing of the swing shaft links the swing of the brush rod head to realize the brushing process.
[0060] It can be seen that for toothbrush heads with conventional high-frequency oscillation design, the back of the high-frequency oscillating brush head directly rubs against the inner wall of the user's oral cavity during use, and the impact-type contact will cause discomfort to the user. The oscillating brush rod disclosed in the utility model is provided with a brim surrounding the back of the brush head at the front section of the shell, and the size of the brim is determined so as not to affect the maximum swing stroke of the brush head. Due to the presence of the brim, the direct contact between the inner wall of the oral cavity and the high-frequency oscillating brush head can be effectively avoided during use by the user, solving the problem of excessive stimulation of the user by the back of the brush head. The presence of the brim also effectively reduces the pressure of the inner wall of the oral cavity on the moving brush head, making the swing amplitude more stable and effectively reducing the loss of power.
[0061] It is obvious that the above description and record are only examples and are not intended to limit the disclosure, application or use of the utility model. Although the embodiments have been described in the embodiments and described in the drawings, the utility model is not limited to the specific examples of the teachings of the utility model as the best mode currently considered to implement the utility model by the drawings and described in the embodiments, and the scope of the utility model will include any embodiment falling within the previous description and the attached claims.
Claims
1. A swing electric toothbrush holder with a protective device, which can be installed on an electric toothbrush, the electric toothbrush comprises a body shell, a swing motor and a battery, the front end of the built-in space of the body shell is provided with a swing motor, the output shaft of the swing motor extends from the front end of the body shell and is connected to the swing electric toothbrush holder located in front of the body shell, and the rear end of the built-in space is provided with a battery, characterized in that: The oscillating electric toothbrush rod comprises a brush rod shell, an internal bracket, an oscillating brush head assembly and an oscillating force transmission assembly. The rear end of the brush rod shell is detachably connected to the electric toothbrush. The brush rod shell is hollow in the shape of a horn, and its rear portion accommodates an internal bracket which is also hollow in the shape of a horn, thereby forming an inner space for a built-in oscillating force transmission assembly. The oscillating brush head assembly is arranged at the front end of the brush rod shell, the rear end of the oscillating force 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 oscillating electric toothbrush holder with a protective device according to claim 1, characterized in that: The oscillating brush head assembly includes a brush rod head, a rotating shaft, a bristle bundle seat and oscillating bristles. The rear end of the brush rod head extends into the front end of the brush rod shell and is rotatably fixed to the internal bracket through the rotating shaft. The front end of the brush rod head is fixed with a bristle bundle seat, and the bristle bundle seat is planted with multiple oscillating bristles for cleaning.
3. The oscillating electric toothbrush holder with a protective device as claimed in claim 2, characterized in that: The brush rod head is provided with an axis hole for the rotating shaft to rotate through, and both ends of the rotating shaft extend into the internal bracket to form a swing fulcrum of the brush rod head.
4. The oscillating electric toothbrush holder with a protective device as claimed in claim 2, characterized in that: The swing force transmission component includes a swing shaft and a coupling component. The front end of the swing shaft is embedded in the concave hole at the rear end of the brush rod head, and the rear end is connected to the coupling component to serve as an output power coupling point.
5. The oscillating electric toothbrush holder with a protective device as claimed in claim 4, characterized in that: The coupling assembly comprises 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.
6. The oscillating electric toothbrush holder with a protective device as claimed in claim 4, characterized in that: The concave hole at the rear end of the brush rod head is perpendicular to the swing axis.
7. The oscillating electric toothbrush holder with a protective device as claimed in claim 4, characterized in that: The coupling assembly adopts an elastic coupling structure, which is composed of a trumpet-shaped connecting pipe and a coupling block in the connecting pipe. The coupling block is an elastic body with a through hole, and the output shaft of the oscillating motor is embedded in the elastic body.
8. The oscillating electric toothbrush holder with a protective device according to claim 7, characterized in that: The coupling block is a hollow sleeve, and a concave annular convex ring is arranged in the middle thereof.
9. The oscillating electric toothbrush holder with a protective device as claimed in any one of claims 2 to 8, characterized in that: A brush head protection cap for accommodating the brush rod head extends from the front end of the brush rod housing. The brush head protection cap and the moving brush rod head maintain a distance to ensure that the swinging brush head does not rub against the brim of the front end of the brush rod housing.
10. The oscillating electric toothbrush holder with a protective device according to claim 9, characterized in that: The brush head protective cap is a cap-shaped tongue edge that half contains the brush head to contain the brush rod head and provide movement space.