CN216876684U

CN216876684U - Electric tooth brush

Info

Publication number: CN216876684U
Application number: CN202123340650.5U
Authority: CN
Inventors: 石岳堂; 唐行明; 梅嘉欣
Original assignee: Suzhou Xinyi Microelectronics Technology Co ltd
Current assignee: Shanghai Xinyi Chunchang Microelectronics Technology Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-07-05
Anticipated expiration: 2031-12-28

Abstract

The utility model provides an electric toothbrush, which comprises a toothbrush head, a connecting rod, a toothbrush handle with an inner space, a pressure conduction piece and a pressure detection module, wherein the first end of the connecting rod is fixedly connected with the toothbrush head, the second end of the connecting rod extends into the inner space through a first constraint structure, the pressure conduction piece is fixedly connected with the second end of the connecting rod, and the toothbrush head, the connecting rod and the pressure conduction piece form a lever structure by taking the first constraint structure as a fulcrum; the electric toothbrush provided by the utility model is simple in structural design, and the deflection of the pressure conduction piece is abutted against the pressure detection module, so that the stress condition on the toothbrush head can be sensitively reflected, the accuracy of the pressure detection of the toothbrush head can be improved, and the user experience can be effectively improved.

Description

Electric tooth brush

Technical Field

The utility model relates to the technical field of household appliances, in particular to an electric toothbrush.

Background

Electric toothbrushes are increasingly accepted by the general public, which have good teeth cleaning. The electric toothbrush has the working principle that: the toothbrush head is driven by a linear motor or an electric motor to vibrate back and forth to clean teeth. When the electric toothbrush is used, the bristles which vibrate at high frequency can cause a certain degree of abrasion to gums and teeth due to overlarge pressure, and meanwhile, the toothpaste falls off or toothpaste foam splashes everywhere due to the vibration of the motor at high frequency. Therefore, the pressure of the brush needs to be detected. Currently, only a few products have pressure detection capabilities.

For example, in the solution disclosed in patent application CN104619211A, a hall sensor is used to provide continuous feedback pressure sensing for a resonant drive toothbrush. The V-shaped spring assembly is mainly used for transferring force, and when the rear end is displaced, the magnet generates a changing magnetic field, so that the Hall sensor outputs a signal to the processor to judge the pressure value. However, the electric toothbrush having the above structure has a complicated structure, which results in a sharp increase in the production cost of the electric toothbrush, and has a large size, which is not easy to carry.

Therefore, how to design an electric toothbrush with a simple structure and capable of effectively detecting pressure becomes a technical problem to be solved in the field.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to solve at least one of the problems occurring in the prior art, and an object of the present invention is to provide an electric toothbrush having a pressure detecting function.

The purpose of the utility model is realized by adopting the following technical scheme:

according to one aspect of the present invention there is provided a powered toothbrush comprising a head, a linkage, and a handle having an interior space, a first end of the linkage being fixedly connected to the head, a second end of the linkage extending into the interior space via a first constraint; the electric toothbrush also comprises a pressure transmitter which is fixedly connected with the second end of the connecting rod, and the toothbrush head, the connecting rod and the pressure transmitter form a lever structure by taking the first constraint structure as a fulcrum; the electric toothbrush further comprises a pressure detection module, wherein the pressure detection module is positioned in the inner space and receives the pressure transmitted by the pressure transmitter through a second constraint structure so as to output an electric signal triggered by the pressure to the outside.

Optionally, the pressure detection module comprises a base plate and a pressure sensor mounted on the base plate, and the base plate is fixedly connected with the inner wall of the toothbrush handle.

Further, the second constraint structure comprises a limiting member and an elastic member, the limiting member is fixedly connected with the inner wall of the toothbrush handle, the elastic member comprises a first side and a second side which are oppositely arranged, the first side of the elastic member is in contact with the pressure transmission member, and the second side of the elastic member is in direct or indirect contact with the pressure sensor.

Further, a soft piece is arranged between the second side of the elastic piece and the pressure sensor, and the second side of the elastic piece is indirectly contacted with the pressure sensor through the soft piece.

Optionally, the first constraint structure is formed by a through hole on the toothbrush handle, a protrusion is provided on an inner wall of the through hole, and a recess corresponding to the protrusion is provided on the connecting rod, and the protrusion is embedded in the recess.

Optionally, the first constraint structure is formed by a through hole on the toothbrush handle and a beam on the through hole, a beam through hole corresponding to the beam is arranged on the connecting rod, and the beam is inserted into the beam through hole.

Optionally, the substrate is a circuit board, and the circuit board is provided with an electrical path connected with a controller of the electric toothbrush to transmit the electrical signal to the controller.

Optionally, the shape of the front end of the boss is one of: rectangular, conical, and arc.

Optionally, the cross-sectional shape of the connecting rod is one of: rectangular, circular, oval, triangular, trapezoidal.

Optionally, the pressure transmitter is a drive motor or an electric motor of the electric toothbrush.

Optionally, the pressure sensor is a MEMS pressure sensor chip.

Optionally, the toothbrush handle is a hollow cylinder or a flat smooth body for easy handling.

The electric toothbrush provided by the embodiment of the utility model is used for solving the problems of complex structure and insufficient detection precision of pressure detection of the electric toothbrush in the prior art, wherein the electric toothbrush comprises a toothbrush head, a connecting rod, a toothbrush handle with an inner space, a pressure conduction piece and a pressure detection module, a first end of the connecting rod is fixedly connected with the toothbrush head, a second end of the connecting rod extends into the inner space through a first constraint structure, the pressure conduction piece is fixedly connected with a second end of the connecting rod, and the toothbrush head, the connecting rod and the pressure conduction piece form a lever structure by taking the first constraint structure as a fulcrum; the pressure detection module is positioned in the inner space and receives the pressure transmitted by the pressure transmitter through the second constraint structure so as to output an electric signal triggered by the pressure to the outside. The electric toothbrush provided by the utility model is simple in structural design, and the deflection of the pressure conduction piece is abutted against the pressure detection module, so that the stress condition on the toothbrush head can be sensitively reflected, the accuracy of the pressure detection of the toothbrush head can be improved, and the user experience can be effectively improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other embodiments based on these drawings without creative efforts.

Fig. 1 is a partial side view schematically illustrating a structure of an electric toothbrush according to an embodiment of the present invention.

Fig. 2 is a partial structural schematic view of a first limit structure of the electric toothbrush according to an embodiment of the present invention.

Fig. 3 is a partial structural view illustrating a first stopper structure of an electric toothbrush according to still another embodiment of the present invention.

Detailed Description

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, the present invention provides a power toothbrush 100, the power toothbrush 100 includes a head 7, a link 6, and a handle 1 having an inner space 10, a first end of the link 6 is fixedly connected to the head 7, and a second end of the link 6 extends into the inner space 10 via a first restriction structure 60; the electric toothbrush 100 further comprises a pressure transmitter 5, the pressure transmitter 5 is fixedly connected with the second end of the connecting rod 6, and the toothbrush head 7, the connecting rod 6 and the pressure transmitter 5 form a lever structure with the first constraint structure 60 as a fulcrum; wherein the electric toothbrush 100 further comprises a pressure detection module 30, the pressure detection module 30 is located in the inner space 10 and receives the pressure transmitted by the pressure transmitter 5 via the second restriction structure 70 to output an electrical signal triggered by the pressure to the outside.

According to the electric toothbrush 100 provided by the embodiment of the utility model, when the toothbrush head 7 is applied with different forces, the pressure transmitter 5 deflects, so that the pressure transmitter 5 abuts against the pressure detection module 30, and the pressure detection module 30 senses different detection values due to different received pressures. Specifically, when the toothbrush head 7 is applied with different pressures, because the toothbrush head 7 is connected with the first end of the connecting rod 6, according to the lever principle, the connecting rod 6 as a vibration shaft can transmit the stress generated by the deformation on the toothbrush head 7 to the second end of the connecting rod 6, because the second end of the connecting rod 6 is connected with the pressure transmission member 5, the pressure transmission member 5 can deflect at different angles and then abut against the pressure detection module 30, the pressure detection module 30 receives the pressure transmitted by the pressure transmission member 5 through the second constraint structure 70, and generates different detection values according to the difference of the received pressure transmitted by the pressure transmission member 5. Therefore, in the process of brushing teeth, the user can feed back the pressure on the toothbrush head 7 through the detection value generated by the pressure detection module 30, and correspondingly prompt the current using strength of the user, so that the habit of using the electric toothbrush by the user can be detected, and a better tooth brushing mode can be recommended to the user according to the detected data, thereby achieving the effect of effectively cleaning teeth. The electric toothbrush can be made more intelligent, for example, by software and hardware in the electric toothbrush 100 being in communication connection with the pressure detection module 30, the usage habit data information of the user can be collected, so as to recommend the optimal usage pattern in time.

The electric toothbrush provided by the utility model is simple in structural design, the pressure detection module 30 is abutted through deflection of the pressure transmission piece 5, the pressure detection module 30 detects the change of the force of the pressure transmission piece 5 abutting against the pressure detection module 30 to feed back the pressure of the toothbrush head 7, the detection precision is high, no complex structural design is needed, the assembly is convenient, and the manufacturing cost is low. Just so solve electric toothbrush effectively and appear the problem emergence of wrong report because of pressure detection is inaccurate to improved the accuracy and the stability that electric toothbrush used, and then reached and to carry out overvoltage protection's suggestion to electric toothbrush, can pass through again the detection data of pressure detection module 30 comes real-time supervision user's dynamics of brushing teeth, knows user's use habit, provides the different schemes of brushing teeth, improves user's experience.

It will be appreciated that in the present embodiment, the toothbrush handle 1 is a hollow cylinder or a flat smooth body that is easy to hold. Also disposed within the interior space 10 of the handle 1 are components such as a battery, and a charging base for charging the battery (not shown) is provided at the end of the handle 1 remote from the toothbrush head 7. In addition, a button for controlling the on-off state and the working mode of the power supply of the electric toothbrush is arranged on one side of the toothbrush handle 1, so that the operation is convenient.

The first end of the connecting rod 6 is fixedly connected with the toothbrush head 7, including but not limited to the detachable connection of the connecting rod 6 with the toothbrush head 7, wherein the detachable connection can be a detachable connection commonly used in the prior art, such as a threaded connection, a snap connection, etc., and will not be described in detail herein.

Specifically, the pressure detection module 30 includes a base plate 2 and a pressure sensor 3 mounted on the base plate 2, wherein the base plate 2 is fixedly connected with the inner wall of the toothbrush handle 1. That is, the substrate 2 is disposed in an internal space 10 formed by the toothbrush handle 1 as a housing, the substrate 2 is bonded to an inner wall of the toothbrush handle 1 by a pressure sensitive adhesive, for example, and the pressure sensor 3 is fixed to the substrate 2 by solder paste or a conductive adhesive, and optionally, the substrate 2 is a circuit board on which an electrical path connected to a controller (not shown) of the electric toothbrush 100 is disposed to transmit an electrical signal triggered by the pressure output from the pressure detection module 30 to the controller. Alternatively, the substrate 2 may be made of a substrate such as FR4 (glass fiber), FPC (Flexible Printed Circuit), or PCB (Printed Circuit Board).

It should be noted that the pressure sensor 3 at least includes a pressure sensor chip, such as a MEMS (Micro-Electro-Mechanical System) pressure sensor chip, and the MEMS pressure sensor chip may be a pressure sensor package structure, that is, the MEMS pressure sensor chip may be packaged by a package. Illustratively, the MEMS pressure sensor chip includes at least one stress-sensing resistor thereon, each stress-sensing resistor comprising two electrodes and a sensing material disposed between the two electrodes. Stress-sensitive resistance on this MEMS pressure sensor chip is a part of wheatstone bridge, certainly also can set up four required resistances of wheatstone bridge, for example, set up 2 stress-sensitive resistance and 2 reference resistance in this MEMS pressure sensor chip, four resistances constitute wheatstone bridge for detect the deformation that takes place for the upper surface of pressure detection module 30 or the lower surface membrane to the toothbrush head 7 that calculates is because of the pressure value that pressurized corresponds.

Further, in order to prevent the pressure transmitter 5 from deviating or slipping at the contact position when abutting against the pressure detection module 30, an elastic member 4 is disposed between the pressure transmitter 5 and the pressure detection module 30, and the elastic member 4 transmits the force to the pressure sensor 3; meanwhile, in order to prevent the toothbrush head 7 from tilting when not in use, the pressure conduction member 5 is further provided with a limiting member 11 directly above the pressure conduction member 5, the limiting member 11 and the elastic member 4 together form a second constraint structure 70, and the limiting member 11 is fixedly connected with the inner wall of the toothbrush handle 1, for example, by adhesive bonding or screw locking and fastening, and the like, without limitation.

The second constraint structure 70 is configured to enable the center (or the center of gravity) of the pressure transmission element 5 connected to the second end of the connecting rod 6 to be located right above the pressure detection module 30, so as to improve the accuracy of pressure detection of the pressure detection module 30. Meanwhile, the deflection angle of the pressure transmitter 5 can be effectively limited, and the force sensitive membrane on the pressure detection module 30 is prevented from being extruded by the overlarge deflection angle, so that the force sensitive membrane is damaged; further, the second restriction structure 70 together with the first restriction structure 60 also serve to maintain the balance of the link 6 when the electric toothbrush 100 is not in use.

Alternatively, in other embodiments of the present invention, the pressure conduction member 5 can also be a driving motor or an electric motor of the electric toothbrush, wherein the driving motor or the electric motor of the electric toothbrush is disposed in the toothbrush handle 1 of the electric toothbrush 100, and an output shaft of the driving motor or the electric motor of the electric toothbrush is connected to the toothbrush head 7 (not shown), so that the toothbrush head 7 generates high-frequency vibration to instantly decompose toothpaste into fine foam to deeply clean teeth. The driving motor or motor in the electric toothbrush 100 is used as the pressure transmission member 5 for transmitting the pressure applied to the brush head 7 to save the inner space 10 of the toothbrush handle 1.

The elastic member 4 includes a first side 41 and a second side 42 disposed opposite to each other, the first side 41 of the elastic member 4 is in contact with the pressure conduction member 41, and the second side 42 of the elastic member 4 is in direct or indirect contact with the pressure sensor 3. Preferably, the elastic member 4 is rubber or silica gel, so that the elastic member 4 not only has certain elasticity, but also facilitates force transmission, and in addition, has the functions of skid resistance and heat insulation.

Further, in order to facilitate concentrated transmission of the transmitted pressure on the pressure transmitter 41 to the pressure sensor 3, a force-bearing body is disposed between the second side 42 of the elastic member 4 and the pressure sensor 3, the force-bearing body is a soft member 31, and the second side 42 of the elastic member 4 and the pressure sensor 3 are indirectly contacted through the soft member 31.

Illustratively, the pressure sensor 3 includes a MEMS pressure sensor chip, and the MEMS pressure sensor chip includes a cavity structure (not shown) and a force sensitive film (not shown) located above the cavity structure, and the force sensitive film is provided with at least one piezoresistor (not shown), and the resistance value of the at least one piezoresistor changes along with the deformation of the force sensitive film.

In the embodiment of the present invention, the second side 42 of the elastic component 4 is in indirect contact with the pressure sensor 3 through the soft component 31, that is, the soft component 31 is disposed above the force sensitive membrane to serve as a force bearing body on the force sensitive membrane, and the soft component 31 (force bearing body) is used for transmitting the received external force to the force sensitive membrane. Optionally, a side surface of the soft body 31 facing away from the force sensitive membrane is convex, on one hand, for facilitating touching and pressing, and on the other hand, for uniformly dispersing external pressure or pressure on the force sensitive membrane to achieve a uniform force. Furthermore, in order to prevent the force sensitive membrane from being torn during the pressing, the soft body member 31 is preferably made of a soft body material, such as a soft gel.

Alternatively, the soft body 31 may be a part of the pressure sensor 3 or the pressure sensing module 30, and the soft body 31 may be in direct contact with a pressure sensor chip of the pressure sensor 3. The soft member 31 is integrally formed with the pressure sensor 3 or the pressure sensing module 30, or the soft member 31 may be additionally disposed after the pressure sensor 3 or the pressure sensing module 30 is manufactured, so as to serve as a stress bearing body of the pressure sensor 3 or the pressure sensing module 30, which is not limited herein.

In the embodiment of the present invention, as shown in fig. 2, the first restriction structure 60 is formed of a through hole 12 formed in the handle 1, and illustratively, the through hole 12 may be formed in a side wall of the handle 1, and the link 6 is disposed along the axial direction of the handle 1, i.e., the link 6 is perpendicular to the side wall of the handle 1, a convex portion 121 is provided on an inner wall of the through hole 12, and a concave portion 61 corresponding to the convex portion 121 is provided on the link 6, the convex part 121 is embedded in the concave part 61, the first end of the connecting rod 6 is fixedly connected with the toothbrush head 7, the second end of the connecting rod 6 extends into the inner space 10 via a first constraint 60, the pressure transmitter 5 is fixedly connected with the second end of the connecting rod 6, so that the toothbrush head 7, the connecting rod 6 and the pressure transmitter 5 form a lever structure with the first constraint structure 60 as a fulcrum.

Optionally, the shape of the front end of the protrusion 121 is one of the following: rectangular, conical, and arc. The corresponding concave part 61 can be a groove, a V-shaped concave surface, an arc surface or the like.

Optionally, the cross-sectional shape of the link 6 is one of: rectangular, circular, oval, triangular, trapezoidal.

Fig. 3 is a partial schematic structural view of a first stopper structure of an electric toothbrush according to yet another embodiment of the present invention.

In the embodiment of the present invention, as shown in fig. 3, the first restriction structure 60 is formed by a through hole 13 formed in the toothbrush handle 1 and a beam 131 formed in the through hole 13, for example, the through hole 13 may be formed in a side wall of the toothbrush handle 1, the link 6 is disposed along the axial direction of the toothbrush handle 1, the beam through hole 63 corresponding to the beam 131 is formed in the link 6, the beam 131 is inserted into the beam through hole 63, a first end of the link 6 is fixedly connected to the toothbrush head 7, a second end of the link 6 is inserted into the inner space 10 through the first restriction structure 60, and the pressure transmitter 5 is fixedly connected to a second end of the link 6, such that the toothbrush head 7, the link 6, and the pressure transmitter 5 form a lever structure with the first restriction structure 60 as a fulcrum.

Therefore, adopt the electric toothbrush 100 of this embodiment, through the deflection of pressure conduction spare 5 supports against pressure detection module 30, pressure detection module 30 detects pressure conduction spare 5 supports against the pressure size that toothbrush head 7 was fed back to the change of pressure detection module 30 power, not only detects the precision height, need not complicated structural design moreover, the equipment is convenient, and the cost of manufacture is low. Just so solve electric toothbrush effectively and appear the problem emergence of wrong report because of pressure detection is inaccurate to improved the accuracy and the stability that electric toothbrush used, and then reached and to carry out overvoltage protection's suggestion to electric toothbrush, can pass through again the detection data of pressure detection module 30 comes real-time supervision user's dynamics of brushing teeth, knows user's use habit, provides the different schemes of brushing teeth, improves user's experience.

The structure design of the electric toothbrush in the above embodiment for detecting the pressure is simple, so that the manufacturing cost of the electric toothbrush 100 can be reduced, and the economic benefit of the electric toothbrush 100 can be improved. Besides, because the deflection of the pressure conduction piece 5 is abutted against the pressure detection module 30, the stress condition on the toothbrush head 7 can be sensitively reflected, and therefore, the accuracy of pressure detection of the toothbrush head 7 can be improved, and the user experience can be effectively improved.

All possible combinations of the technical features of the above embodiments may be arbitrarily combined, and for the sake of simplicity of description, all possible combinations of the technical features of the above embodiments are not described, however, the combinations of the technical features are considered to be within the scope of the present specification as long as there is no contradiction.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An electric toothbrush, characterized in that the electric toothbrush comprises a toothbrush head, a connecting rod, and a toothbrush handle having an interior space, wherein a first end of the connecting rod is fixedly connected with the toothbrush head, and a second end of the connecting rod extends into the interior space via a first restriction structure;

the electric toothbrush also comprises a pressure transmitter, the pressure transmitter is fixedly connected with the second end of the connecting rod, and the toothbrush head, the connecting rod and the pressure transmitter form a lever structure by taking the first constraint structure as a fulcrum;

the electric toothbrush further comprises a pressure detection module, wherein the pressure detection module is positioned in the inner space and receives the pressure transmitted by the pressure transmitter through a second constraint structure so as to output an electric signal triggered by the pressure to the outside.

2. The electric toothbrush of claim 1, wherein the pressure sensing module comprises a base plate and a pressure sensor mounted on the base plate, the base plate being fixedly coupled to an inner wall of the toothbrush handle.

3. The powered toothbrush of claim 2, wherein the second constraint structure includes a retaining member fixedly attached to an inner wall of the handle and an elastic member having a first side and a second side disposed opposite to each other, the first side of the elastic member contacting the pressure-transmitting member and the second side of the elastic member contacting the pressure sensor directly or indirectly.

4. The powered toothbrush as defined in claim 3, wherein a soft member is disposed between said second side of said elastomeric member and said pressure sensor, said second side of said elastomeric member being in indirect contact with said pressure sensor through said soft member.

5. The electric toothbrush of claim 1,

the first constraint structure is composed of a through hole on the toothbrush handle, a convex part is arranged on the inner wall of the through hole, a concave part corresponding to the convex part is arranged on the connecting rod, and the convex part is embedded in the concave part.

6. The electric toothbrush of claim 1,

the first constraint structure is composed of a through hole in the toothbrush handle and a cross beam on the through hole, a cross beam through hole corresponding to the cross beam is arranged on the connecting rod, and the cross beam penetrates through the cross beam through hole.

7. The electric toothbrush of claim 2, wherein the substrate is a circuit board having electrical pathways disposed thereon for connection to a controller of the electric toothbrush for transmitting the electrical signals to the controller.

8. The electric toothbrush according to claim 5, wherein the shape of the front end of the convex portion is one of: rectangular, conical, and arc.

9. The powered toothbrush of claim 1, wherein the cross-sectional shape of the link is one of: rectangular, circular, oval, triangular, trapezoidal.

10. The electric toothbrush according to claim 1, wherein the pressure transmitter is a driving motor or an electric motor of the electric toothbrush.

11. The powered toothbrush of claim 2, wherein the pressure sensor is a MEMS pressure sensor chip.

12. The powered toothbrush of claim 1, wherein the handle is a hollow cylinder or a flat smooth body for easy handling.