CN216081849U - Brush head pressure detection device of electric toothbrush - Google Patents

Abstract

The utility model discloses a brush head pressure detection device of an electric toothbrush, which comprises: a motor; the shell is provided with a shaft hole; the output shaft extends out of the head of the motor and penetrates through the shaft hole; the first end part of the deformation detection piece is connected with the tail part of the motor, the second end part of the deformation detection piece is connected with the shell, and the first end part of the deformation detection piece and the second end part of the deformation detection piece are oppositely arranged along the axial direction of the motor; the deformation detection piece can elastically deform, and generates and outputs a corresponding detection signal after detecting the deformation amount of the deformation detection piece. The utility model aims to provide a simple and effective brush head pressure detection device.

Description

Brush head pressure detection device of electric toothbrush

Technical Field

The utility model belongs to the technical field of electric toothbrushes, and particularly relates to a brush head pressure detection device of an electric toothbrush.

Background

The electric toothbrush on the market at present installs pressure sensor and realizes the detection to brush head pressure because electric toothbrush needs to solve following technical problem: when the toothbrush head is used, toothpaste is easy to splash after the toothbrush head is moved out of the oral cavity when the vibration amplitude is large, but the vibration amplitude is small, and a good cleaning effect cannot be achieved. If the detection of the pressure of the brush head can be realized, a preset value can be set, and the amplitude of the brush head is controlled by comparing the detected pressure of the brush head with the preset value.

When a user does not put the brush head into the oral cavity, the pressure value sensed by the pressure sensor is equal to the preset value, the brush head is in a first vibration state, the amplitude of the brush head is small, and toothpaste is prevented from splashing; when the user stretched into the oral cavity with the brush head, can press the brush hair on the tooth along its extending direction, the tooth produced the effort of operation direction dorsad to the brush head this moment, leads to pressure sensor's pressure value to reduce, is less than first preset value when this pressure value, and the brush head is switched to the second vibration state by first vibration state this moment, that is to say the amplitude increase of brush head, has strengthened the clean effect of brush head to the tooth.

However, the pressure detection structure of the brush head in the prior art is very complex, and has more parts, thereby not only increasing the volume of the electric toothbrush, but also increasing the weight of the electric toothbrush and the risk of being damaged and difficult to repair.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a simple and effective brushhead pressure detecting device.

This patent scheme provides an electric toothbrush's first pressure measurement of brush, includes:

a motor;

the shell is provided with a shaft hole;

the output shaft extends out of the head of the motor and penetrates through the shaft hole;

the first end part of the deformation detection piece is connected with the tail part of the motor, the second end part of the deformation detection piece is connected with the shell, and the first end part of the deformation detection piece and the second end part of the deformation detection piece are oppositely arranged along the axial direction of the motor; the deformation detection piece can elastically deform, and generates and outputs a corresponding detection signal after detecting the deformation amount of the deformation detection piece.

Further, the output shaft contacts with the side wall of the shaft hole to form a contact point, or the motor contacts with the shaft hole to form a contact point.

Further, the deformation detecting member includes an elastically deformable deformation member and a pressure sensor; the first end part of the deformation piece is connected with the tail part of the motor, the second end part of the deformation piece is connected with the shell, and the first end part of the deformation piece and the second end part of the deformation piece are oppositely arranged along the axial direction of the motor; the pressure sensor is fixedly arranged between the first end part of the deformation part and the second end part of the deformation part, and generates and outputs corresponding detection signals after detecting the deformation quantity of the deformation part.

Further, the second end of the shape-changing element is rigidly connected to the housing.

Furthermore, the second end of the deformation part is provided with connecting parts at two sides opposite to the axial direction of the motor, and the second end of the deformation part is connected with the shell through the connecting parts.

Further, the second end of the deformation member protrudes outwards relative to the two axial side portions of the motor to form the connecting portion.

Furthermore, one end, far away from the first end of the deformation piece, of the second end of the deformation piece is connected with the shell.

Furthermore, the tail end of the motor is provided with a mounting platform in a protruding mode, and the first end portion of the deformation piece is mounted on the mounting platform and is in rigid connection with the tail portion of the motor through the mounting platform.

The improvement of this patent brings the following advantage:

(1) the utility model provides a first pressure measurement of brush of electric toothbrush device, this device has utilized lever principle ingeniously, and its structure is compared prior art's the same kind of device and has been simplified by a wide margin. The brush head of the electric toothbrush is arranged at one end of the output shaft which extends outwards, and when a user extends the brush head into the oral cavity and presses the brush head on teeth to brush teeth, the teeth provide a reaction force for the brush head, namely a reaction force for the output shaft. The reaction force enables the extending end of the output shaft or the motor in the shaft hole direction to prop against the side wall of the shaft hole, and a lever taking the output shaft as a power arm, taking a contact point of the output shaft and the shaft hole (or a contact point of the motor and the shaft hole) as a fulcrum and taking the motor as a resistance arm is formed at the moment. The reaction force of the teeth on the output shaft enables the motor to tilt by taking the contact point as a fulcrum, so that the first end of the deformation detection piece connected to the tail of the motor is driven to tilt. Because the second tip of deformation detection piece is connected and can't upwards perk with the shell, the deformation detection piece can only take place elastic deformation in order to offset the effort of motor perk. At this time, the deformation detecting part detects the deformation amount generated by the deformation detecting part, so that the pressure applied to the brush head (namely the reaction force of the teeth on the brush head) can be indirectly detected, and the deformation detecting part converts the pressure into a corresponding detection signal and outputs the detection signal to the control module so as to control the amplitude of the brush head. When a user does not press the brush head on the teeth to brush teeth (for example, the brush head is moved out of the oral cavity), the deformation quantity of the deformation detection piece is smaller when the brush head is subjected to smaller or no pressure, and the amplitude of the brush head can be reduced at this time so as to prevent toothpaste foam from splashing; when a user presses the brush head on teeth to brush teeth, the deformation quantity of the deformation detection piece is larger when the brush head is subjected to larger pressure, and the amplitude of the brush head can be increased at this time, so that the cleaning effect on the teeth is enhanced.

(2) The device flexibly uses the original output shaft, the motor, the shell and other components of the electric toothbrush as one part of the structure of the device, and only needs to additionally arrange a deformation detection piece with simple structure, so that the function can be realized by a plurality of additionally arranged components in the prior art. The structure is simple, and the working mode is simple and effective; the additional parts (except the original necessary parts such as an output shaft, a motor and the like, the additional parts are additionally arranged) are few, the occupied volume and the counterweight are small, and the volume and the weight of the electric toothbrush can not be greatly increased; long service life and convenient maintenance.

Drawings

Fig. 1 is a schematic perspective view of a pressure detecting device for a toothbrush head of an electric toothbrush according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a brush head pressure detection device of an electric toothbrush according to an embodiment of the present application with a housing removed;

wherein, 1 is the motor, 11 is the mount table, 2 is the shell, 21 is the shaft hole, 3 is the output shaft, 4 is deformation detection spare, 41 is deformation detection spare first end, 42 is deformation detection spare second end, 43 is deformation spare, 431 is deformation spare first end, 432 is deformation spare second end, 4321 is connecting portion, 44 is pressure sensor.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.

Referring to fig. 1 and 2, an embodiment 1 of the present application provides a pressure detecting device for a toothbrush head of an electric toothbrush, including

The motor 1 is a vibration motor, and outputs high-frequency vibration for the brush head through the output shaft 3 so as to achieve the cleaning effect; a mounting table 11 is protruded at the tail end of the motor 1;

the motor 1 and the deformation detection piece 4 are wrapped by the shell 2, a shaft hole 21 is formed in the shell 2 and used for allowing the output shaft 3 of the motor 1 to penetrate through, a gap between the shaft hole 21 and the output shaft 3 is small, one part of the output shaft 3 is in contact with or connected with the side wall of the shaft hole 21 to form a contact point, and the contact point can be used as a fulcrum of a lever of the output shaft 3-the motor 1; or the extending end of the motor 1 in the direction of the shaft hole 21 is contacted or connected with the side wall of the shaft hole 21 to form a contact point;

the output shaft 3 extends out of the head of the motor 1, penetrates through the shaft hole 21 and extends outwards through the shell 2, and one end, extending out, of the output shaft 3 is used for mounting a brush head;

the deformation detection part 4 has two functions, one is elastic deformation, the other is the detection capability of the deformation amount of the deformation detection part, and the deformation detection part 4 is a main component for detecting the pressure of the brush head; the deformation detection part 4 is provided with a first end part 41 and a second end part 41 which are oppositely arranged along the axial direction of the motor 1, the first end part 41 of the deformation detection part is connected with the tail part of the motor 1, and the second end part 42 of the deformation detection part is connected with the shell 2; the deformation detecting part 4 generates and outputs a corresponding detection signal to a control module of the electric toothbrush after detecting the deformation amount of the deformation detecting part; the deformation detecting member 4 is composed of a deformation member 43 and a pressure sensor 44; the deformation member 43 is made of an elastic material, such as plastic, rubber, metal, etc., and the deformation member 43 has a first end 431 and a second end 432 opposite to each other along the axial direction of the motor 1, and may also be a deformation detecting member first end 41 and a deformation detecting member second end 42, which are functionally identical; connecting parts 4321 are arranged on two opposite sides of the second end part 432 of the deformation part in the axial direction of the motor 1, and the connecting parts 4321 are formed by partial bulges on the two sides; the first end 431 of the deformation piece is arranged on the mounting table 11 at the tail end of the motor 1 and is rigidly connected with the tail part of the motor 1 through the mounting table 11; when the tail part of the motor 1 tilts under the action of a lever, the first end part 431 of the deformation piece is also passively stretched upwards; the second end portion 432 of the deformable member is rigidly connected to the housing 2 through the connection portion 4321, and when the first end portion 431 of the deformable member is stretched upward, the second end portion 432 of the deformable member is rigidly connected to the housing 2 and is not movable, so that the portion between the first end portion 431 and the second end portion 432 of the deformable member is elastically deformed to counteract the tilting force of the tail of the motor 1; at this time, the deformation amount of the deformation member 43 is detected by the pressure sensor 44 fixedly disposed between the first end 431 and the second end 432 of the deformation member, and a detection signal is generated and outputted to the control module of the electric toothbrush, so as to control the working state of the motor 1 and control the amplitude of the brush head. When the deformation member 43 is elastically deformed, the upper surface of the pressure sensor 44 is expanded or contracted, and the lower surface is contracted or expanded, thereby realizing the detection of the deformation amount of the deformation member 43.

This application embodiment 2 is a brush head pressure detection device of electric toothbrush, this embodiment is basically the same as embodiment 1, the difference lies in: the second end 432 of the deformation member is rigidly connected to the housing 2 through the end thereof away from the first end 431 of the deformation member, the end is opposite to the connection between the deformation member 43 and the tail of the motor 1 along the axial direction of the motor 1, and is in the same axial direction as the lever of the output shaft 3-the motor 1, which is beneficial to lever action, so that the deformation member 43 generates a larger deformation amount, and the detection by the pressure sensor 44 is easy.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1. A brush head pressure detection device of an electric toothbrush is characterized by comprising:

a motor;

the shell is provided with a shaft hole;

the output shaft extends out of the head of the motor and penetrates through the shaft hole;

the deformation detects the piece, but deformation detection piece elastic deformation, the first end of deformation detection piece with the end connection of motor, the second end of deformation detection piece with the shell is connected, deformation detection piece first end with deformation detection piece second end is followed the axial of motor sets up relatively.

2. The device for detecting the pressure of the brush head of the electric toothbrush according to claim 1, wherein the output shaft contacts with the side wall of the shaft hole to form a contact point, or the motor contacts with the shaft hole to form a contact point.

3. The brushhead pressure detecting apparatus of an electric toothbrush according to claim 1 or 2, wherein the deformation detecting member includes an elastically deformable deformation member and a pressure sensor; the first end part of the deformation piece is connected with the tail part of the motor, the second end part of the deformation piece is connected with the shell, and the first end part of the deformation piece and the second end part of the deformation piece are oppositely arranged along the axial direction of the motor; the pressure sensor is fixedly arranged between the first end part of the deformation part and the second end part of the deformation part.

4. The brushhead pressure detecting device of an electric toothbrush of claim 3, wherein the shape-changing member second end portion is rigidly connected to the housing.

5. The apparatus as claimed in claim 4, wherein the second end of the deformable member is provided with a connecting portion at two sides of the second end of the deformable member with respect to the axial direction of the motor, and the second end of the deformable member is connected to the housing through the connecting portion.

6. The device for detecting pressure of brush head of electric toothbrush according to claim 5, wherein the second end of the deformation member protrudes outwardly from the two axial sides of the motor to form the connecting portion.

7. The apparatus of claim 4, wherein an end of the second end of the shape-changing member distal from the first end of the shape-changing member is connected to the housing.

8. The device for detecting the pressure of the brush head of the electric toothbrush according to claim 3, wherein a mounting platform is protruded from the rear end of the motor, and the first end of the deformation member is mounted on the mounting platform and rigidly connected to the rear end of the motor through the mounting platform.

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