CN213047424U

CN213047424U - Electric tooth brush

Info

Publication number: CN213047424U
Application number: CN202020887172.6U
Authority: CN
Inventors: 尹值坤; 彭煨松; 练乃荣; 张远平; 许振康
Original assignee: Shenzhen Sushi Technology Co Ltd
Current assignee: Soocare Shenzhen Technology Co Ltd; Shenzhen Sushi Technology Co Ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2021-04-27
Anticipated expiration: 2030-05-22

Abstract

The utility model provides an electric toothbrush, including bracket component, first subassembly of brush, coupling assembling and pressure sensor, pressure sensor sets up on the bracket component, and coupling assembling is connected with first subassembly of brush, and when first subassembly atress of brush, pressure transmits to coupling assembling through first subassembly of brush to make pressure sensor produce deformation. The technical scheme of the utility model electric toothbrush has solved among the prior art insensitive problem of forced induction effectively.

Description

Electric tooth brush

Technical Field

The utility model relates to a daily electric appliance field, concretely relates to electric toothbrush.

Background

An electric toothbrush is a household appliance that cleans the surfaces of teeth by electrically driving a brush head to vibrate, and is gradually favored by consumers because it simplifies user operations and has the advantage of more comprehensive cleaning at the same time.

When the user presses the brush head on the tooth surface, pressure is generated on the tooth surface, and when the pressure is too large, the teeth and the gum of the user are easily damaged. The electric toothbrush on the market at present usually adopts pure mechanical structure to realize the forced induction to the brush head, and this mechanical structure roughly can divide into: firstly, an inductive switch is triggered through the displacement of the brush head and the power output shaft under the action of pressure, so that the motor can perform corresponding protection action when the pressure of the brush head is higher; and secondly, the connecting piece is disconnected through the displacement of the brush head and the power output shaft under the action of pressure, so that the motor can perform corresponding protection action when the pressure of the brush head is higher.

No matter which mechanical structure mode is adopted, on one hand, the pressure induction is insensitive and the precision is low; on the other hand, the pressure values corresponding to the protection actions are all fixed and need to be set by the production party, the user feels the brush head pressure different from person to person, the subjective feeling of the user on the brush head pressure does not necessarily correspond to the pressure values objectively set by the production party, and the use experience of the user is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving among the prior art electric toothbrush to the insensitive problem of forced induction. In order to solve the problem, the utility model provides an electric toothbrush, including bracket component, first subassembly of brush, coupling assembling and pressure sensor, pressure sensor sets up on the bracket component, and coupling assembling is connected with first subassembly of brush, and when first subassembly atress of brush, pressure transmits to coupling assembling through first subassembly of brush to make pressure sensor produce deformation.

Further, the electric toothbrush also comprises a motor component, and when the brush head component is stressed, pressure is transmitted to the motor component through the brush head component and the connecting component, so that the pressure sensor generates deformation.

Further, the motor assembly comprises a motor body, and pressure is transmitted to the motor body through the connecting assembly; or

The motor assembly comprises a motor body and a motor vibration reduction module, and pressure is transmitted to the motor body through the connecting assembly and the motor vibration reduction module.

Further, motor element still includes motor front end support, and the motor body has the transmission axle that stretches out to coupling assembling, and motor front end support sets up in the transmission axle outside, and pressure passes through motor body and transmits to motor front end support.

Further, the pressure sensor comprises a sensor body and a protrusion extending from the sensor body to the motor assembly, wherein the protrusion is used for sensing pressure from the motor assembly when the brush head assembly is stressed.

Further, the electric toothbrush also comprises a motor assembly, the motor assembly comprises a circuit board and a motor body, and the pressure sensor is electrically connected with the circuit board.

Further, motor element still includes motor support, and motor support covers establishes in the outside of motor body, and motor support is provided with first fulcrum towards the bracket component, and first fulcrum can contact with the bracket component.

Further, electric toothbrush still includes the casing, and the bracket component sets up in the casing, and the casing is provided with the second fulcrum towards the bracket component, and the second fulcrum can contact with the bracket component.

Further, the brush head assembly comprises a base body and bristles, the base body is connected with the connecting assembly, the bristles are arranged on one side of the base body, and the pressure sensor is located on the other side, opposite to the bristles, of the base body.

Further, the pressure sensor is a flexible pressure sensor.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

when the user uses the electric toothbrush, the real-time pressure between the brush head assembly and the teeth is transmitted to the pressure sensor through the connecting assembly, and the pressure sensor can convert the pressure into a digital signal, so that the electric toothbrush can quickly and accurately make corresponding actions by utilizing the digital signal. Compare in traditional mechanical structure feedback pressure's mode, the pressure sensor of this embodiment utilizes pressure sensing technique, makes inside can sense the small pressure value of applying on brushing first subassembly, improves pressure sensing's precision degree, makes electric toothbrush can be more sensitive, the feedback is rapider to the response that receives pressure on brushing first subassembly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

FIG. 1 shows a schematic view of an embodiment of an electric toothbrush according to the present invention with the housing removed;

FIG. 2 shows a schematic cross-sectional structural view of an embodiment of an electric toothbrush according to the present invention;

FIG. 3 illustrates a partial enlarged structural view at A of the electric toothbrush of FIG. 2;

FIG. 4 is a schematic sectional view of the powered toothbrush of FIG. 2;

FIG. 5 is a schematic cross-sectional view of the powered toothbrush of FIG. 2 in the direction of C-C;

fig. 6 shows a schematic circuit configuration diagram of the sensor body of the present embodiment; and

fig. 7 is a schematic view showing a control process of the electric toothbrush of the present embodiment.

The above figures contain the following reference numerals:

10. a housing; 11. a housing body; 12. a second fulcrum; 13. a limiting groove; 20. a bracket assembly; 30. a motor assembly; 31. a motor body; 32. a motor front end bracket; 33. a motor bracket; 34. a first fulcrum; 35. a transmission shaft; 36. a limiting part; 38. a motor vibration reduction module; 39. a circuit board; 40. a brush head assembly; 41. a substrate; 42. brushing; 50. a connecting assembly; 51. a connecting shaft; 52. cutting into noodles; 60. a pressure sensor; 61. a sensor body; 62. a protrusion; 80. and a support member.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 to 5, the electric toothbrush of this embodiment includes a bracket assembly 20, a brushhead assembly 40, a connecting assembly 50 and a pressure sensor 60, wherein the pressure sensor 60 is disposed on the bracket assembly 20, the connecting assembly 50 is connected with the brushhead assembly 40, and when the brushhead assembly 40 is stressed, the pressure is transmitted to the connecting assembly 50 through the brushhead assembly 40, so that the pressure sensor 60 is deformed.

By applying the technical scheme of the embodiment, when the user uses the electric toothbrush, the real-time pressure between the brush head assembly 40 and the teeth is transmitted to the pressure sensor 60 through the connecting assembly 50, and the pressure sensor 60 can convert the pressure into a digital signal, so that the electric toothbrush can quickly and accurately make corresponding actions by using the digital signal. Compare in traditional mechanical structure feedback pressure's mode, the pressure sensor 60 of this embodiment utilizes pressure sensing technique, makes inside can sense the tiny pressure value of exerting on brush head assembly 40, improves pressure sensing's precision degree, makes electric toothbrush can be more sensitive, the feedback is rapider to the response that receives pressure on the brush head assembly 40.

As shown in fig. 1 and 2, the brush head assembly 40 of the present embodiment includes a base 41 and bristles 42, the base 41 is connected to the connecting assembly 50, the bristles 42 are disposed on one side of the base 41, and a pressure sensor 60 is disposed on the other side of the base 41 opposite to the bristles 42. When a user uses the electric toothbrush, the electric toothbrush is applied with force towards the tooth surface, the pressure sensor 60 is arranged on the back surface of the base body 41, so that the pressure applied to the pressure sensor 60 and the force of the tooth surface reacting on the brush head component 40 are in the same direction, the pressure sensor 60 can accurately sense the tiny pressure value applied to the brush head component and the tiny change of the pressure, and the detection sensitivity of the sensor 60 is improved.

The power toothbrush can adjust the state of rotation and/or vibration of the brushhead assembly 40 in response to the deformation generated by the pressure sensor 60. When the brushhead assembly 40 is subjected to a force, the pressure is transmitted through the brushhead assembly 40 to the connecting assembly 50 and then directly or indirectly to the pressure sensor 60, causing the pressure sensor 60 to deform. For example, the electric toothbrush of this embodiment further includes the motor assembly 30, and when the head assembly 40 is subjected to a force, the pressure is transmitted to the motor assembly 30 through the head assembly 40 and the connecting assembly 50, so that the pressure sensor 60 is deformed by the pressure of the motor assembly 30. Therefore, the electric toothbrush can control the working state of the brush head assembly 40 by converting the deformation of the pressure sensor 60 into a digital signal to control the motor assembly 30 to adjust the output power according to the pressure detected by the pressure sensor 60.

Meanwhile, since the pressure between the brush head assembly 40 and the teeth of the user is monitored by the pressure sensor 60 in real time in this embodiment, the critical pressure for the motor assembly 30 to perform the protection action can be preset by the user, and when the pressure is greater than the preset value, the motor assembly 30 can perform the corresponding protection action to protect the teeth and gums of the user. Compared with the traditional electric toothbrush which can only make the protection action when the pressure exceeds a fixed preset value, the electric toothbrush of the embodiment can self-define the critical pressure of the protection action according to the difference of different users, and can provide better experience for the users.

As shown in fig. 2 and 3, the motor assembly 30 of the present embodiment includes a motor body 31 and a motor damping module 38, the motor damping module 38 is disposed between the motor body 31 and the connecting assembly 50, and the pressure can be transmitted to the motor body 31 through the connecting assembly 50 and the motor damping module 38.

In the embodiment not shown in the drawings, which does not have a motor damping module, the connecting assembly is connected to the motor body, and the pressure can also be directly transmitted to the motor body through the connecting assembly.

The motor assembly 30 further includes a motor front end bracket 32, the motor body 31 has a transmission shaft 35 protruding toward the connection assembly 50, the motor front end bracket 32 is disposed outside the transmission shaft 35, and the pressure is transmitted to the motor front end bracket 32 through the motor body 31. The pressure sensor 60 may be in contact with the motor front bracket 32. When the brush head assembly 40 is pressed, the pressure is transmitted to the motor front end bracket 32 and the motor body 31 through the connecting assembly 50 and the motor damping module 38, and the motor front end bracket 32 presses the pressure sensor 60 to deform the pressure sensor.

The motor assembly 30 of the present embodiment further includes a circuit board 39, and the pressure sensor 60 is electrically connected to the circuit board 39. Specifically, the pressure sensor 60 may be electrically connected to the circuit board 39 through an FPC cable.

Preferably, the pressure sensor 60 of the electric toothbrush of this embodiment is a flexible pressure sensor, such as a stretchable membrane pressure sensor, which is made by printing a polymer resistive material on a membrane-like substrate, and the membrane-like substrate forms a resistive bridge, and when a voltage is applied to the upper and lower ends of the resistive bridge, a voltage is generated at the middle end of the resistive bridge. A film-like substrate has flexibility and can be stretched or compressed, and when the film is stretched, the resistance value increases; when the membrane is compressed, the resistance value decreases. The voltage difference is generated in the middle of the resistor bridge through the change of the resistance value, the voltage sensing chip can convert the voltage difference (analog signal) generated in the middle of the resistor bridge into a target voltage difference (digital signal), and the stress can be reflected by detecting the voltage difference.

As shown in fig. 3, the pressure sensor 60 includes a sensor body 61 and a protrusion 62, the protrusion 62 is disposed on the sensor body 61 and extends toward the motor assembly 30, when the brushhead assembly 40 is stressed, the pressure is transmitted to the motor assembly 30 and applied to the protrusion 62, and the pressure is converted into deformation of the sensor body 61 to form a voltage difference.

As shown in fig. 6, the circuit of the sensor body 61 includes: the circuit comprises a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4; two ends of the first resistor R1 are respectively and electrically connected with a positive terminal V + + of the input power supply and a positive terminal S + of the output power supply; two ends of the second resistor R2 are respectively and electrically connected with the negative end GND of the input power supply and the positive end S + of the output power supply; two ends of the third resistor R3 are respectively and electrically connected with the positive terminal V + + of the input power supply and the negative terminal S-of the output power supply; two ends of the fourth resistor R4 are electrically connected to the negative terminal GND of the input power supply and the negative terminal S-of the output power supply, respectively. The first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are all made of polymer resistive material printing. The positive terminal S + of the output power supply and the negative terminal S-of the output power supply are electrically connected with the pressure-sensitive chip.

Optionally, the specifications of the first resistor R1, the second resistor R2, the third resistor R3, and the fourth resistor R4 may all be the same, may not be the same, and may also be partially the same.

The bulge 62 of the pressure sensor 60 is in contact with the motor front end support 32, the signal transmission process is as shown in fig. 7, when the brush head assembly 40 is pressed, the pressure is transmitted to the motor front end support 32 through the connecting assembly 50, the motor vibration reduction module 38 and the motor body 31, the bulge 62 deforms the sensor body 61 and generates a voltage difference under the pressure of the motor front end support 32, the voltage difference generated in the middle of the resistor bridge is converted into a target voltage difference by the pressure sensing chip, at the moment, the pressure of the brush head assembly 40 is converted into a digital signal, the digital signal is processed by the controller to generate a control signal and is sent to the motor driver, the motor body 31 is driven to start and stop or the output power of the motor body 31 is changed, and therefore the purpose of controlling the rotation and/or vibration state of the brush head assembly 40 is achieved.

In other embodiments not shown in the figures, the pressure sensor may be a pressure sensor of other configurations.

Meanwhile, the electric toothbrush of the present embodiment can solve the problem of toothpaste falling off when the user brushes the teeth by using the pressure sensor 60. The toothpaste body is firstly squeezed to the bristles of the electric toothbrush by a user before tooth brushing, but the situation that the toothpaste falls off from the bristles often occurs due to the large vibration frequency or amplitude of the bristles when the electric toothbrush is started, so that waste is caused to a certain extent, and the use experience of the user is also influenced.

By applying the technical scheme of the embodiment, the motor assembly 30 can be started to the cleaning frequency after the user presses the brush head assembly 40 on the tooth surface, that is, when the pressure monitored by the pressure sensor 60 is less than the preset value, the motor assembly 30 is operated under low power or not operated, so that the brush head assembly 40 slightly vibrates or stops working, the toothpaste body can be kept on the brush head assembly 40 before entering the oral cavity of the user, and the toothpaste body is effectively prevented from falling off when the motor assembly 30 is suddenly started; when the pressure monitored by the pressure sensor 60 is greater than or equal to the preset value, the power of the motor assembly 30 is increased to the working power, so that the waste of toothpaste can be reduced to a certain extent, and the use experience of a user is improved.

As shown in fig. 2, the motor assembly 30 of the present embodiment further includes a motor bracket 33, the motor bracket 33 covers the outer side of the motor body 31, the motor bracket 33 is provided with a first supporting point 34 facing the bracket assembly 20, and the first supporting point 34 can contact with the bracket assembly 20. The first pivot 34 keeps a certain distance between the motor bracket 33 and the bracket assembly 20, so that the motor bracket 33 can be prevented from applying pressure to the pressure sensor 60 when unnecessary, and misoperation can be avoided.

As shown in fig. 1 and 5, the motor bracket 33 of the present embodiment is provided with a limiting portion 36, each limiting portion 36 extends out along the radial direction of the housing 10, the housing body 11 is provided with a limiting groove 13 adapted to the limiting portion 36, and the limiting portion 36 can extend into the limiting groove 13. The limiting part 36 and the limiting groove 13 are matched to fix the motor body 31 and limit the rotation of the motor body 31. Therefore, the consistency of the relative spatial positions of the motor support 33 and the internal assembly components, the shell body 11, the support assembly 20 and the pressure sensor 60 can be ensured, the stability of the motor body 31 and the pressure sensor 60 in the shell 10 is improved, and the detection effect of the pressure sensor 60 is improved.

Further, the limiting parts 36 of the present embodiment are two parts symmetrically disposed on the motor bracket 33. In other embodiments not shown in the figures, the number of the limiting parts can be adjusted according to the internal space and the structural requirements.

As shown in fig. 2 and 3, the connecting assembly 50 of this embodiment includes a connecting shaft 51, one end of the connecting shaft 51 is connected to the motor damping module 38, and the other end of the connecting shaft 51 extends out of the housing 10 and can be connected to the brush head assembly 40.

In order to drive the brush head assembly 40 to move smoothly, the connecting shaft 51 of this embodiment is provided with a tangent plane 52 at an end facing the brush head assembly 40, and the brush head assembly 40 is provided with a connecting hole adapted to the tangent plane 52. The section 52 provides torque for the brush head assembly 40, so that the connecting shaft 51 can drive the brush head assembly 40 to complete axial swing when vibrating along with the motor body 31, and the end parts of the bristles 42 reciprocate to complete the action of cleaning the tooth surface.

As shown in fig. 3 and 4, the electric toothbrush of this embodiment further includes a support 80, the support 80 is disposed in the housing 10 and located near one end of the brush head assembly 40, the connecting shaft 51 is inserted into the support 80, and the end of the stand assembly 20 abuts against the support 80. The housing 10 of the present embodiment includes a housing body 11 and a second fulcrum 12 provided on the housing body 11, and the second fulcrum 12 is in contact with the bracket assembly 20. The second fulcrum 12 fixes the bracket assembly 20 on the housing body 11, so that the pressure sensor 60 can be fixed at a preset position and contact with the motor front end bracket 32, and accurate measurement is ensured.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides an electric toothbrush, its characterized in that includes bracket component, brush first subassembly, coupling assembling and pressure sensor, pressure sensor sets up on the bracket component, coupling assembling with brush first subassembly and be connected, when brush first subassembly atress, pressure passes through brush first subassembly transmits to coupling assembling so that pressure sensor produces deformation.

2. The powered toothbrush as defined in claim 1, further comprising a motor assembly, wherein when the brushhead assembly is subjected to a force, pressure is transmitted through the brushhead assembly and the connection assembly to the motor assembly to cause the pressure sensor to deform.

3. The electric toothbrush of claim 2, wherein the motor assembly includes a motor body, pressure being transmitted to the motor body through the connection assembly; or

The motor assembly comprises a motor body and a motor vibration reduction module, and pressure passes through the connecting assembly and the motor vibration reduction module is transmitted to the motor body.

4. The electric toothbrush according to claim 3, wherein the motor assembly further comprises a motor front end bracket, the motor body having a transmission shaft protruding toward the coupling assembly, the motor front end bracket being disposed outside the transmission shaft, the pressure being transmitted to the motor front end bracket through the motor body.

5. The electric toothbrush of claim 2, wherein the pressure sensor includes a sensor body and a protrusion extending from the sensor body toward the motor assembly, the protrusion for sensing pressure from the motor assembly when the brushhead assembly is forced.

6. The electric toothbrush of claim 1, further comprising a motor assembly including a circuit board and a motor body, the pressure sensor being electrically connected to the circuit board.

7. The electric toothbrush according to claim 6, wherein the motor assembly further comprises a motor bracket, the motor bracket is covered on the outer side of the motor body, the motor bracket is provided with a first fulcrum toward the bracket assembly, and the first fulcrum can be contacted with the bracket assembly.

8. The electric toothbrush of claim 1, further comprising a housing, wherein the bracket assembly is disposed within the housing, wherein the housing is provided with a second fulcrum toward the bracket assembly, wherein the second fulcrum is contactable with the bracket assembly.

9. The powered toothbrush as defined in claim 1, wherein the brushhead assembly includes a base and bristles, the base being connected to the connecting assembly, the bristles being disposed on one side of the base, the pressure sensor being located on the opposite side of the base from the bristles.

10. The electric toothbrush of claim 1, wherein the pressure sensor is a flexible pressure sensor.