CN211023245U

CN211023245U - Electric toothbrush with shock-absorbing inner support assembly

Info

Publication number: CN211023245U
Application number: CN201921467120.7U
Authority: CN
Inventors: 廖建明; 菅原敏雄; 王思逸
Original assignee: Oasis Global Ltd
Current assignee: Oasis Global Ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-07-17
Anticipated expiration: 2029-09-05

Abstract

An electric toothbrush with a damping inner support assembly comprises an inner support, a vibration motor and an output shaft, wherein the rear end of the inner support is provided with a motor support for coating and fixing the vibration motor, the front end of the inner support is provided with a mounting part mounted on a shell of the electric toothbrush, the outer periphery of the mounting part is connected to the shell of the electric toothbrush, the whole damping inner support assembly is only contacted and fastened with the shell through the outer periphery of the mounting part, so that two ends of the inner support are suspended, and the inner support is fastened on the shell by a fulcrum, the mounting part is internally provided with an annular buffer structure, the annular buffer structure is an annular groove formed in the mounting part, and the section of the outer wall of the mounting part surrounding the output shaft is a U-shaped; therefore, the utility model discloses effectively solve because of the shock dynamo device causes in the handle that often to hold the vibration sense strong, the problem that the first position vibration sense of brush is weak on the contrary, also can effectively improve the whole physique of toothbrush, realize the fine flexibility of toothbrush.

Description

Electric toothbrush with shock-absorbing inner support assembly

Technical Field

The utility model relates to an electric toothbrush's technical field especially relates to an electric toothbrush with shock attenuation inner support subassembly.

Background

With the continuous improvement of living standards of people, the requirement on the toothbrush is higher and higher, in the prior art, a vibration toothbrush with a small volume is commonly designed into two types, in one of the two types, a vibration motor 103 can be directly arranged in a handle 101, the handle 101 directly vibrates, and then the vibration is transmitted to a brush head 102 through an output shaft 104 fastened on the handle, as shown in fig. 1A, although the design ensures the fineness of a brush rod part and has a simple structure, the vibration motor is directly arranged in a shell, the vibration sense of the handle is strong, and a user is very uncomfortable; in another design, the vibrating motor 103 can be arranged as close to the brush head 102 as possible, theoretically, the vibrating motor is arranged as far as possible towards the direction of the brush head 102, and the handle 101 is connected to the vibrating motor 103 through the output shaft 104, in the design, the vibrating effect of the brush head 102 is optimal, and the elimination of vibration in the handheld position is easy to handle, but the problem is that the vibrating motor is arranged at the position of the brush head 102, the thickness D2 of the whole brush rod is thicker and thicker in appearance than the thickness D1 in the figure 1A, the appearance is affected, and the flexibility of the using process is affected due to the fact that the size of the brush rod is too large, and the design of the method is shown in the figure 1B.

Therefore, in view of the above-mentioned drawbacks, the designer of the present invention has studied and designed an electric toothbrush having a shock-absorbing inner support assembly by combining experience and achievement from related industries for many years through careful study and design to overcome the above-mentioned drawbacks.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electric toothbrush with shock attenuation inner support subassembly, its simple structure, operation loading and unloading are convenient, effectively solve because of the shock dynamo device causes in the handle often to hold the vibration strong, the problem that the first position vibration is weak is partly felt, also can effectively improve the whole physique of toothbrush, realize the slender flexibility of toothbrush.

In order to solve the problem, the utility model discloses an electric toothbrush with shock attenuation inner support subassembly, its characterized in that:

the shock attenuation inner support subassembly contains inner support, shock dynamo and output shaft, the rear end of inner support is equipped with the motor frame of the fixed shock dynamo of cladding, and the front end is equipped with the installation department of installation to electric toothbrush casing, the outer peripheral edges of installation department are connected to electric toothbrush's casing, and whole shock attenuation inner support subassembly is only through the outer peripheral edges of installation department and casing contact and fastening in order to form the state of inner support both ends unsettled and leaning on the fulcrum fastening at the casing.

Wherein: the rear end that the installation department supplied output shaft inserts fixedly, be equipped with annular buffer structure in the installation department, thereby annular groove installation department that annular buffer structure formed for the installation department surrounds for the U-shaped cross-section in the outer wall cross-section of output shaft.

Wherein: the rear end of the vibration motor is provided with an eccentric wheel, and the motor frame is integrally and eccentrically connected to the rear end of the mounting part.

Wherein: the electric toothbrush is provided with a shell and a brush head positioned at the front end of the shell, the periphery of an installation part of an inner support of the shock absorption inner support component is connected and fixed on the inner wall of the shell, a shock motor at the rear end of the shock absorption inner support component is suspended in the shell to generate shock power, and an output shaft extends into the brush head to transmit shock to the brush head.

Wherein: the shell is internally provided with a control circuit board beside the inner support, and the rear end is internally provided with a power supply assembly electrically connected to the vibration motor.

According to the structure, the utility model discloses an electric toothbrush with shock attenuation inner support subassembly has following effect:

1. by utilizing the resonance structure of the inner bracket and the shell component, the eccentric wheel vibration motor is fastened on the inner bracket and in the shell. The power is output to the toothbrush rod through an output shaft arranged at the other end of the inner bracket. The problem of the built-in motor of common vibrations toothbrush hand-held vibrations at the handle too strong is solved to improved the brush-holder stud physique, realized the slim outward appearance of brush-holder stud.

2. Solves the common defects that the vibration toothbrush with the vibration motor arranged in the handle has over-strong vibration sense at the hand-held position and insufficient power of the toothbrush head. The portable water-proof hand-held vibration sensor has the advantages of simple overall design structure, few waterproof sealing positions, comfortable hand-held vibration feeling, low cost and the like, and has higher market popularization value.

The details of the present invention can be obtained from the following description and the attached drawings.

Drawings

Fig. 1A and 1B show schematic views of two prior art electric toothbrush designs.

Fig. 2 shows a schematic structural diagram of the middle shock-absorbing inner support assembly of the present invention.

Figure 3 shows a front view of the middle shock absorbing inner support assembly of the present invention.

Fig. 4 shows a cross-sectional view in the direction of the arrows in fig. 3.

Fig. 5 shows the internal structure of the middle shock-absorbing inner support assembly of the present invention.

Fig. 6 shows a schematic view of the electric toothbrush with a shock absorbing inner support assembly of the present invention.

Fig. 7A, 7B and 7C show the function of the middle shock-absorbing inner support assembly of the present invention.

Fig. 8 shows a mechanical model diagram of the inner support assembly with shock absorption according to the present invention.

Detailed Description

Referring to fig. 2 to 5, schematic views of the vibration absorbing inner bracket assembly of the electric toothbrush having the vibration absorbing inner bracket assembly of the present invention are shown.

The shock-absorbing inner support component can comprise an inner support 10, a vibration motor 13 and an output shaft 15, the motor support 11 for coating the fixed vibration motor 13 is arranged at the rear end of the inner support 10, the front end of the inner support is provided with an installation part 12 installed on the shell of the electric toothbrush, the installation part 12 and the motor support 11 can be integrally formed, the outer periphery of the installation part 12 can be connected to the shell of the electric toothbrush through a threaded connection structure or a buckle connection structure, the whole shock-absorbing inner support component is only supported in the shell through the outer periphery of the installation part 12 and is in contact and fastened with the shell to form a state that two ends of the inner support are suspended and fastened on the shell through a fulcrum.

Wherein, the center of the mounting part 12 is provided with a receiving groove for inserting and fixing the rear end of the output shaft 15.

Wherein, an annular buffer structure 16 is arranged in the mounting portion 12, and preferably, the annular buffer structure 16 is an annular groove formed in the mounting portion 12, so that the section of the outer wall of the mounting portion 12 surrounding the output shaft 15 is a U-shaped section (see fig. 7A, 7B and 7C at the same time).

Wherein, the rear end of the vibrating motor 13 is provided with an eccentric wheel 14, and the motor frame 11 is integrally and eccentrically connected with the rear end of the mounting part 12.

As shown in fig. 6, the structural schematic diagram of the electric toothbrush with the shock-absorbing inner support assembly of the present invention is shown, the electric toothbrush is provided with a casing 20 for the operator to grip and a brush head 21 located at the front end of the casing, the inner support 10 of the shock-absorbing inner support assembly is fixed on the inner wall of the casing at the periphery of the installation part, the shock-absorbing electric motor 13 at the rear end of the inner support assembly is suspended in the casing 20 to generate shock power, the output shaft 15 extends into the brush head 21 to transmit the shock to the brush head 21, the control circuit board 22 located beside the inner support 10 is arranged in the casing 20, and the power supply assembly 23 electrically connected to the shock motor 13 is further arranged in the rear end.

Therefore, as shown in fig. 8, the vibration motor 13 drives the eccentric wheel 14 to generate vibration by rotating at a high speed, the force for generating vibration is a centrifugal force, the direction of the force is shown by arrows in the figure, and because the two ends of the whole inner support except a fulcrum are both in a suspended design, the inner support is equivalent to a lever model in mechanics, the whole lever vibrates under the action of the vibration motor, and the change along the amplitude of the lever is in a linear amplitude distribution. Theoretically the upper endpoint amplitude is zero. The vibration amplitude can be increased progressively along the extension of the two ends of the fulcrum, the design of the support is essentially an amplitude transformer in the vibration process, and the moment arms at the two ends of the fulcrum determine the proportion of amplitude variation.

Referring to fig. 7A, 7B and 7C, since the annular groove is provided at the fulcrum position of the lever (i.e., inside the mounting portion and outside the output shaft of the present invention), the integral mounting portion is constructed as an elastic body. When the motor vibration is transmitted to the fulcrum, the amplitude is minimum. At the moment, the vibration is further reduced to the outer ring of the annular groove through the buffering of the annular groove, and a better damping effect is achieved. In the extreme rightward movement state shown in fig. 7A and the extreme leftward movement state shown in fig. 7C, the annular groove provides stretching and compressing spaces on both sides, and in the centered state shown in fig. 7B, the annular groove is centered and reset, the outer edge of the mounting part is fastened with the shell through threads or buckles, only the position is connected with the bracket, and the rest part of the bracket is in a suspended design relative to the shell. Through foretell processing, the vibrations of casing are repayed by shock dynamo and are reduced by a wide margin, effectively reach the utility model discloses a purpose.

The inner support and the annular groove are designed, and the other function is to transmit vibration energy to the brush head in a resonance mode. The mechanism process is as follows:

referring to fig. 8, assuming that when the centrifugal force generated by the vibrating motor is downward as shown in the figure, the annular groove is compressed, deformed and compressed, and the deformation process is actually an energy storage process (see fig. 7A), when the centrifugal force direction of the motor is reversed to be upward (see fig. 7C), the annular groove starts to release the compressed energy storage and starts new compression in a reverse direction, and the stored energy is superposed with the centrifugal force at the moment, so that the swing of the bracket is accelerated, and the common spring type simple harmonic system is formed. Therefore, the natural resonant frequency constructed by the whole weight and the physical size of the bracket can be matched with the frequency of the vibrating motor, and the brush head can obtain the maximum and high-efficiency energy from the vibrating motor under the condition of the same electrical performance parameters of the vibrating motor by the bracket.

Theoretically, the system resonance frequency is related to the following materials and physical quantities:

1. the rigidity of the annular groove is in direct proportion to the resonant frequency, the factors influencing the rigidity are material characteristics and physical dimensions, and the thicker the wall thickness of the U-shaped section formed by the mounting part is, the higher the rigidity is.

2. The weight of the bracket and the brush head is inversely proportional to the resonant frequency.

3. The frequency is inversely proportional to the length of the force arm of the stent.

It is to be understood that the above description and illustrations are exemplary only and are not intended to limit the present disclosure, application, or uses. While embodiments have been described in the embodiments and depicted in the drawings, the present invention is not limited to the particular examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the present invention, and the scope of the present invention is intended to include any embodiments that fall within the foregoing description and the appended claims.

Claims

1. An electric toothbrush having a vibration dampening inner support assembly, characterized by:

2. The powered toothbrush having a shock absorbing inner support assembly of claim 1, wherein: the rear end that the installation department supplied output shaft inserts fixedly, be equipped with annular buffer structure in the installation department, thereby annular groove installation department that annular buffer structure formed for the installation department surrounds for the U-shaped cross-section in the outer wall cross-section of output shaft.

3. The powered toothbrush having a shock absorbing inner support assembly of claim 1, wherein: the rear end of the vibration motor is provided with an eccentric wheel, and the motor frame is integrally and eccentrically connected to the rear end of the mounting part.

4. The powered toothbrush having a shock absorbing inner support assembly of claim 1, wherein: the electric toothbrush is provided with a shell and a brush head positioned at the front end of the shell, the periphery of an installation part of an inner support of the shock absorption inner support component is connected and fixed on the inner wall of the shell, a shock motor at the rear end of the shock absorption inner support component is suspended in the shell to generate shock power, and an output shaft extends into the brush head to transmit shock to the brush head.

5. The powered toothbrush having a shock absorbing inner support assembly of claim 4, wherein: the shell is internally provided with a control circuit board beside the inner support, and the rear end is internally provided with a power supply assembly electrically connected to the vibration motor.