CN219423011U

CN219423011U - Electric toothbrush

Info

Publication number: CN219423011U
Application number: CN202223329840.1U
Authority: CN
Inventors: 梁耀武; 尹值坤; 闵鹏波
Original assignee: Shenzhen Sushi Technology Co Ltd
Current assignee: Shenzhen Sushi Technology Co Ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-07-28
Anticipated expiration: 2032-12-09
Also published as: WO2024120077A1

Abstract

The utility model discloses an electric toothbrush. Wherein, electric toothbrush includes: a handle shell, the outer surface of which is provided with a dent; a motor disposed inside the handle housing; the capacitive pressure sensor is arranged at a position corresponding to the recess on the inner surface of the handle shell and is connected with the judging circuit, and comprises a pressure sensing unit and a capacitance sensing unit and is used for generating and outputting a first signal and a second signal to the judging circuit; the main control processor is arranged inside the handle shell and connected with the judging circuit and is used for generating a control instruction for controlling the motor to drive when the detection signal meets the preset condition; the motor drive is used for driving the motor according to the received control instruction; a battery; and the tail cover is arranged at the bottom of the handle shell. The utility model solves the technical problem that the keys of the electric toothbrush in the related art are easy to be touched by mistake.

Description

Electric toothbrush

Technical Field

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

Background

Electric toothbrushes are becoming increasingly common household washing appliances, and most of the electric toothbrushes currently on the market use a single button to provide all control functions and are currently the dominant control mode. The purely mechanical key switch control method judges whether false touch is prevented or not by the time length of key triggering, the accuracy of the processing mode is not high, a certain loophole exists in the triggering time length judgment, and false touch in a reasonable setting range cannot be avoided at all. False triggering often occurs during transportation and handling, and the experience for the customer is poor. The pure pressure-sensing electric toothbrush scheme judges whether false triggering is performed or not by setting the pressure value of the pressure sensor and the threshold range. The technology is difficult to fundamentally solve the false triggering caused by sliding touch triggering and water drops and water stains in a wet use environment, and especially the false triggering caused by external force extrusion and collision cannot be avoided at all.

In view of the above problems, no effective solution has been proposed at present.

Disclosure of Invention

The embodiment of the utility model provides an electric toothbrush, which at least solves the technical problem that keys of the electric toothbrush in the related art are easy to touch by mistake.

According to an aspect of an embodiment of the present utility model, there is provided an electric toothbrush including: a handle housing 11, the outer surface of the handle housing 11 being provided with a recess; a motor 12, the motor 12 being disposed inside the handle housing 11; the capacitive pressure sensor 13 is arranged at a position corresponding to the recess on the inner surface of the handle shell 11 and is connected with the judging circuit 14, the capacitive pressure sensor 13 comprises a pressure sensing unit and a capacitance sensing unit and is used for generating and outputting a first signal and a second signal to the judging circuit 14, wherein the first signal is a signal generated by the pressure sensing unit for detecting pressure change at the recess position, and the second signal is a signal generated by the capacitance sensing unit for detecting whether the recess position contacts a preset medium; the judging circuit 14 is respectively connected with the capacitive pressure sensor 13 and the main control processor 26 and is used for outputting detection signals to the main control processor 26 according to the first signal and the second signal; a main control processor 26, disposed inside the handle housing 11, connected to the judging circuit 14, for generating a control instruction for controlling the motor drive 27 when the detection signal satisfies a predetermined condition; one end of the motor drive 27 is connected with the main control processor 26, and the other end is connected with the motor 12 for driving the motor 12 according to the received control instruction; a battery 15, provided inside the handle housing 11, for supplying power to the motor 12, the main control processor 26, the motor drive 27 and the capacitive pressure sensor 13; a battery 15, provided inside the handle housing 11, for supplying power to the motor 12, the main control processor 26, the motor drive 27 and the capacitive pressure sensor 13; a tail cap 16, the tail cap 16 being provided at the bottom of the handle housing 11.

Optionally, the handle housing 11 comprises: grooves provided on the inner surface of the handle housing 11 at positions corresponding to the depressions.

Optionally, the capacitive pressure sensor 13 is arranged at the geometric centre of the recess.

Optionally, the material of the handle housing 11 and the thickness of the handle housing 11 between the recess and the groove are any one of the following combinations: the material of the handle shell 11 is polycarbonate, and the thickness of the handle shell 11 between the concave and the groove is not more than 2mm; the handle shell 11 is made of glass, and the thickness of the handle shell 11 between the concave and the groove is not more than 5mm; the handle shell 11 is made of stainless steel, and the thickness of the handle shell 11 between the concave and the groove is not more than 1mm; the handle shell 11 is made of aluminum, and the thickness of the handle shell 11 between the concave and the groove is not more than 5mm; the material of the handle housing 11 is acrylonitrile-butadiene-styrene plastic, and the thickness of the handle housing 11 between the concave and the groove is not more than 5mm.

Optionally, the depth of the groove is no greater than 0.4mm.

Optionally, the recess is rectangular, and the distance between the capacitive pressure sensor 13 and any frame of the recess is greater than 0.3mm.

Optionally, the electric toothbrush comprises: the capacitive pressure sensor comprises a plurality of capacitive pressure sensors 13, a plurality of grooves and a plurality of depressions, wherein the plurality of grooves are respectively in one-to-one correspondence with the plurality of depressions, and the plurality of capacitive pressure sensors 13 are respectively arranged in the plurality of grooves.

Optionally, a distance between two adjacent grooves in the plurality of grooves is not less than 5mm.

The capacitive pressure sensor 13 is a semiconductor type capacitive pressure sensor.

Optionally, the capacitive pressure sensor 13 includes: a printed circuit board 17 and a sensing chip 18, wherein the sensing chip 18 is disposed on a surface of the printed circuit board 17.

Optionally, a printed circuit board 17 is provided between the inner surface of the handle housing 11 and the sensor chip 18.

The printed circuit board 17 is made of glass fiber epoxy resin material and has a thickness of 0.4mm-0.6mm.

Optionally, the judging circuit 14 includes: the first switch and the second switch are both turned on, when the first switch and the second switch are both turned on, the connection circuit between the motor 12 and the battery 15 is turned on, wherein the first switch is used for judging whether the pressure signal in the detection signal reaches a first threshold value, and when the pressure signal reaches the first threshold value, the first switch is turned on; and the second switch is used for judging whether the capacitance signal in the signal reaches a second threshold value or not, and when the capacitance signal reaches the second threshold value, the second switch is opened.

Alternatively, a flexible circuit board flat cable 19 and a flexible circuit board socket 20 are provided inside the handle housing 11, respectively connected with the capacitive pressure sensor 13 and the judgment circuit 14, for transmitting detection signals.

By applying the technical scheme of the utility model, the utility model provides an anti-false touch electric toothbrush, which comprises: a handle housing 11, the outer surface of the handle housing 11 being provided with a recess; a motor 12, the motor 12 being disposed inside the handle housing 11; the capacitive pressure sensor 13 is arranged at a position corresponding to the recess on the inner surface of the handle shell 11 and is connected with the judging circuit 14, the capacitive pressure sensor 13 comprises a pressure sensing unit and a capacitance sensing unit and is used for generating and outputting a first signal and a second signal to the judging circuit 14, wherein the first signal is a signal generated by the pressure sensing unit for detecting pressure change at the recess position, and the second signal is a signal generated by the capacitance sensing unit for detecting whether the recess position contacts a preset medium; the judging circuit 14 is respectively connected with the capacitive pressure sensor 13 and the main control processor 26 and is used for outputting detection signals to the main control processor 26 according to the first signal and the second signal; a main control processor 26, disposed inside the handle housing 11, connected to the judging circuit 14, for generating a control instruction for controlling the motor drive 27 when the detection signal satisfies a predetermined condition; one end of the motor drive 27 is connected with the main control processor 26, and the other end is connected with the motor 12 for driving the motor 12 according to the received control instruction; a battery 15, provided inside the handle housing 11, for supplying power to the motor 12, the main control processor 26, the motor drive 27 and the capacitive pressure sensor 13; a battery 15, provided inside the handle housing 11, for supplying power to the motor 12, the main control processor 26, the motor drive 27 and the capacitive pressure sensor 13; a tail cap 16, the tail cap 16 being provided at the bottom of the handle housing 11. The electric toothbrush provided by the utility model is used for detecting whether the electric toothbrush is touched by a hand, so that the technical effect of preventing the electric toothbrush from being touched by mistake is realized, and the technical problem that the electric toothbrush is easy to touch by mistake in the related art is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

FIG. 1 is a block diagram of an electric toothbrush according to an embodiment of the present utility model;

FIG. 2 is a schematic illustration of a structure at a button of an electric toothbrush provided in accordance with an alternative embodiment of the present utility model;

FIG. 3 is a schematic view of an electric toothbrush structure provided in accordance with an alternative embodiment of the present utility model;

FIG. 4 is a schematic view of the internal structure of an electric toothbrush provided in accordance with an alternative embodiment of the present utility model;

FIG. 5 is a block diagram of an electric toothbrush key arrangement provided in accordance with an alternative embodiment of the present utility model;

FIG. 6 is a circuit block diagram of a capacitive pressure sensor provided in accordance with an alternative embodiment of the present utility model;

fig. 7 is a circuit connection diagram of a circuit board provided according to an alternative embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

11. a handle housing; 12. a motor; 13. a capacitive pressure sensor; 14. a judgment circuit; 15. a battery; 16. a tail cover; 17. a printed circuit board; 18. a sensing chip; 19. flexible circuit board flat cable; 20. a flexible circuit board receptacle; 21. a waterproof rubber plug; 22. waterproof support frame; 23. a motor shaft; 24. a groove of the motor shaft; 25. a spindle pressure sensor; 26. a master control processor; 27. and (5) driving a motor.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

According to an embodiment of the present utility model, there is provided an electric toothbrush, fig. 1 is a block diagram of a structure of an electric toothbrush according to an embodiment of the present utility model, as shown in fig. 1, comprising: the electric toothbrush is described below with reference to a handle housing 11, a motor 12, a capacitive pressure sensor 13, a judgment circuit 14, a battery 15, and a tail cap 16.

A handle housing 11, the outer surface of the handle housing 11 being provided with a recess; a motor 12, the motor 12 being disposed inside the handle housing 11; the capacitive pressure sensor 13 is arranged at a position corresponding to the recess on the inner surface of the handle shell 11 and is connected with the judging circuit 14, the capacitive pressure sensor 13 comprises a pressure sensing unit and a capacitance sensing unit and is used for generating and outputting a first signal and a second signal to the judging circuit 14, wherein the first signal is a signal generated by the pressure sensing unit for detecting pressure change at the recess position, and the second signal is a signal generated by the capacitance sensing unit for detecting whether the recess position contacts a preset medium; the judging circuit 14 is respectively connected with the capacitive pressure sensor 13 and the main control processor 26 and is used for outputting detection signals to the main control processor 26 according to the first signal and the second signal; a main control processor 26, disposed inside the handle housing 11, connected to the judging circuit 14, for generating a control instruction for controlling the motor drive 27 when the detection signal satisfies a predetermined condition; one end of the motor drive 27 is connected with the main control processor 26, and the other end is connected with the motor 12 for driving the motor 12 according to the received control instruction; a battery 15, provided inside the handle housing 11, for supplying power to the motor 12, the main control processor 26, the motor drive 27 and the capacitive pressure sensor 13; a tail cap 16, the tail cap 16 being provided at the bottom of the handle housing 11.

In this embodiment, a recess is provided on the outer surface of the handle housing 11 in the electric toothbrush, and a capacitive pressure sensor 13 is provided at the inner surface of the handle housing 11 corresponding to the recess, the recess and the capacitive pressure sensor 13 corresponding thereto constitute a key of the electric toothbrush. Because the electric toothbrush can contact water under most use conditions due to the fact that the structural waterproofness of the mechanical keys is poor, and the mechanical keys are not suitable for the use environment of the electric toothbrush, the electric toothbrush does not adopt clear mechanical keys to indicate the positions of the keys to a user, but is provided with the pits at the keys on the outer surface of the handle shell 11, patterns can be marked at the pit positions, and the positions of the keys can be marked for the user. Meanwhile, when a user presses the key, the concave structure is beneficial to concentrating the pressure applied to the whole concave at the geometric center of the concave, and is beneficial to the capacitive pressure sensor 13 to collect pressure data. The preset medium can be human skin, when a user presses a key with the skin, the capacitive pressure sensor 13 detects the pressure variation of the concave part, and transmits the generated first signal representing the pressure variation to the judging circuit 14; the capacitive pressure sensor 13 is configured to detect whether a target object in the contact recess is a preset medium, and at this time, is configured to detect whether the target object is human skin, and send a generated second signal representing whether the target object is human skin to the determination circuit 14, where the principle is that: when the target object of the contact recess is human skin, the capacitance variation value of the capacitive pressure sensor 13 is within a certain range. The judgment circuit 14 receives the first signal and the second signal transmitted by the housing sensor, and when the touch of the target object to the recess is a false touch, the judgment circuit 14 blocks the connection circuit between the battery 15 and the motor 12. A tail cap 16 of the electric toothbrush is connected to the bottom of the handle housing 11 for protecting the inner parts of the electric toothbrush from water.

The capacitive pressure sensor 13 may include two sensing units, which may detect the magnitude of the pressure received at the recess and output a first signal according to the magnitude of the pressure; the capacitance sensing unit can detect the material of the object contacting the concave position according to the change of the capacitance of the capacitor at the concave position and output a second signal.

As an alternative embodiment, the handle housing 11 includes: grooves provided on the inner surface of the handle housing 11 at positions corresponding to the depressions.

Optionally, a groove is arranged at a position of the inner surface of the handle shell 11 corresponding to the recess of the outer surface and used for placing the capacitive pressure sensor 13, and the groove can effectively place the influence of other parts in the electric toothbrush on the capacitive pressure sensor 13, so that the detection of the capacitive pressure sensor 13 can be prevented from being in error.

As an alternative embodiment, the capacitive pressure sensor 13 is arranged at the geometric centre of the recess.

Optionally, the capacitive pressure sensor 13 is disposed at the geometric center of the groove, so that the sensing area of the capacitive pressure sensor 13 covers the area of the recess, and the touch action of the recess can be responded comprehensively.

As an alternative embodiment, the material of the handle housing 11 and the thickness of the handle housing 11 between the recess and the groove are any one of the following combinations: the material of the handle shell 11 is polycarbonate, and the thickness of the handle shell 11 between the concave and the groove is not more than 2mm; the handle shell 11 is made of glass, and the thickness of the handle shell 11 between the concave and the groove is not more than 5mm; the handle shell 11 is made of stainless steel, and the thickness of the handle shell 11 between the concave and the groove is not more than 1mm; the handle shell 11 is made of aluminum, and the thickness of the handle shell 11 between the concave and the groove is not more than 5mm; the material of the handle housing 11 is acrylonitrile-butadiene-styrene plastic, and the thickness of the handle housing 11 between the concave and the groove is not more than 5mm.

Alternatively, the thickness of the handle housing 11 between the recess and the groove may affect the accuracy of detection of the capacitive pressure sensor 13, because the capacitive pressure sensor 13 needs to respond to the touching action of the recess of the handle housing 11, and the thicker the thickness of the handle housing 11 between the recess and the groove, the smaller the amount of change detected by the capacitive pressure sensor 13. When the materials of the handle housing 11 are different, the thicknesses of the handle housing 11 between the recess and the groove should also be different, and the present utility model gives a correspondence between five materials and thicknesses, and the materials and thicknesses of the handle housing 11 may be selected from any one of the five materials and thicknesses.

As an alternative embodiment, the depth of the groove is not more than 0.4mm.

Optionally, the depth of the groove is not greater than the thickness of the capacitive pressure sensor 13, i.e. 0.4mm, so as not to contact with a circuit board included in the capacitive pressure sensor 13, affecting the detection effect.

As an alternative embodiment, the recess is rectangular, and the distance between the capacitive pressure sensor 13 and any rim of the recess is greater than 0.3mm.

Alternatively, the shape of the groove may be rectangular, and the distance between any frame of the groove and the capacitive pressure sensor 13 is not less than 0.3mm, so as not to affect the detection effect of the capacitive pressure sensor 13.

As an alternative embodiment, an electric toothbrush includes: the capacitive pressure sensor comprises a plurality of capacitive pressure sensors 13, a plurality of grooves and a plurality of depressions, wherein the plurality of grooves are respectively in one-to-one correspondence with the plurality of depressions, and the plurality of capacitive pressure sensors 13 are respectively arranged in the plurality of grooves.

Optionally, the electric toothbrush may include a plurality of capacitive pressure sensors 13, a plurality of grooves and a plurality of recesses, where the three are equal in number, one capacitive pressure sensor 13 and one groove and one recess may form a button of the electric toothbrush, and the plurality of capacitive pressure sensors 13, the plurality of grooves and the plurality of recesses are in one-to-one correspondence, and may form a button equal to the three.

As an alternative embodiment, the distance between two adjacent grooves in the plurality of grooves is not less than 5mm.

Alternatively, when a plurality of keys are included in one electric toothbrush, the distance between the grooves of every two adjacent keys is not less than 5mm so as not to influence any of the capacitive pressure sensors 13 corresponding to every two keys.

As an alternative embodiment, the capacitive pressure sensor 13 is a semiconductor type capacitive pressure sensor.

Alternatively, there are various capacitive pressure sensors available on the market, and the capacitive pressure sensor 13 may be a semiconductor type capacitive pressure sensor. Compared with the traditional capacitance or resistance type pressure sensor, the semiconductor type pressure sensor has smaller volume, higher precision and stronger anti-interference performance, and is beneficial to the more accurate identification of the touch action of a user.

As an alternative embodiment, the capacitive pressure sensor 13 comprises: a printed circuit board 17 and a sensing chip 18, wherein the sensing chip 18 is disposed on a surface of the printed circuit board 17.

Alternatively, the capacitive pressure sensor 13 may include a printed circuit board 17 and a sensor chip 18, the printed circuit board 17 being a carrier for integrating the sensor and the resistive-capacitive element, and the sensor chip 18 for detecting the pressure variation and the capacitance variation in the recess. The sensor chip 18 may be provided on the surface of the printed circuit board 17 with glue.

As an alternative embodiment, a printed circuit board 17 is provided between the inner surface of the handle housing 11 and the sensor chip 18.

Alternatively, fig. 2 is a schematic diagram of a structure of a button of an electric toothbrush according to an alternative embodiment of the present utility model, and when the capacitive pressure sensor 13 is connected to the handle housing 11 as shown in fig. 2, the sensing chip 18 is first connected to a surface of the printed circuit board 17, and then the surface of the printed circuit board 17 to which the sensing chip 18 is not connected is connected to the handle housing 11. Because the surface of the printed circuit board 17, which is not connected with the sensing chip 18, is more sensitive in the capacitive pressure sensor 13, the pressure change and capacitance change in the concave position can be detected advantageously.

As an alternative embodiment, the printed circuit board 17 is made of glass fiber epoxy resin material with a thickness of 0.4mm-0.6mm.

Alternatively, the printed circuit board may be made of various materials, such as a hard board and a soft board, the printed circuit board 17 may be made of glass fiber epoxy resin material, the material model is FR-4, and the printed circuit board made of glass fiber epoxy resin material is a hard board, since the printed circuit board 17 is located between the inner surface of the handle housing 11 and the sensor chip 18 in the present utility model, it is necessary to conduct the pressure applied to the handle housing 11 to the sensor chip 18, and if the printed circuit board 17 is a soft board, the accuracy of the pressure signal detected by the sensor chip 18 may be degraded, so the material of the printed circuit board 17 may be selected to be made of glass fiber epoxy resin material. Meanwhile, the thinner the thickness of the printed circuit board 17 is, the better the thickness is, the thickness can be between 0.4mm and 0.6mm, and when the thickness of the printed circuit board 17 is more than 0.6mm, the pressure signal sensed by the sensing chip 18 can be lower, so that the sensing precision is affected; at present, the printed circuit board with the thickness of less than 0.4mm has high requirements on the manufacturing process and is fragile, and the cost of the electric toothbrush can be greatly improved by using the printed circuit board with the thickness of less than 0.4mm, so that the thickness of the printed circuit board can be between 0.4mm and 0.6mm, the tolerance is +/-0.15 mm, and the boundary value of the range can be taken.

As an alternative embodiment, the judging circuit 14 includes: the judging circuit 14 outputs the detection signal to the main control processor 26 when both the first switch and the second switch are turned on, wherein the first switch is used for judging whether the first signal reaches a first threshold value, and when the first signal reaches the first threshold value, the first switch is turned on; and the second switch is used for judging whether the second signal reaches a second threshold value or not, and when the second signal reaches the second threshold value, the second switch is opened.

Optionally, the first switch may be a first comparator, where a positive pin of the first comparator is connected to the pressure sensing unit in the capacitive pressure sensor 13, a negative pin of the first comparator is connected to an output end of the first threshold signal generating circuit, the first threshold signal generating circuit may generate a stable first threshold signal, and the first threshold signal is input to the first comparator through the negative pin of the first comparator, and an output pin of the first comparator is connected to an and gate in the logic circuit; the second switch can be a second comparator, the positive pin of the second comparator is connected with the capacitance sensing unit in the capacitance pressure sensor 13, the negative pin of the second comparator is connected with the output end of the second threshold signal generating circuit, the second threshold signal generating circuit can generate a stable second threshold signal, the second threshold signal is input into the second comparator through the negative pin of the second comparator, and the output pin of the second comparator is connected with the AND gate; the and gate has two input terminals connected to the output pins of the first comparator and the second comparator, respectively, and an output terminal of the and gate may be connected to the main control processor 26 and output a detection signal to the main control processor 26. When the judging circuit 14 is the loop, the first switch turns on the circuit when the voltage of the first signal is higher than the first threshold signal, the second switch turns on the circuit when the voltage of the second signal is higher than the second threshold signal, when the voltages of the first signal and the second signal are respectively higher than the voltages of the first threshold signal and the second threshold signal, the AND gate can output a detection signal to the main control processor 26, when the detection signal is received by the main control processor 26, the main control processor can judge whether the detection signal meets the preset condition, when the detection signal meets the preset condition, a control command for controlling the motor drive 27 is generated, and the motor drive 27 drives the motor 12 according to the control command issued by the main control processor 26, namely, the electric toothbrush is started. When the voltages of the first signal and the second signal do not reach the voltages of the first threshold signal and the second threshold signal, the touch detected by the capacitive pressure sensor 13 is judged to be false touch, and the electric toothbrush is not started.

As an optional embodiment, the first field effect transistor and the second field effect transistor may be NMOS transistors or PMOS transistors; when the voltage of the first signal is higher than the first threshold signal, the first comparator can output a high level, and the Vgs of the NMOS tube in the first switch is larger than zero based on the high level, so that the source electrode and the grid electrode of the NMOS tube in the first switch are conducted; similarly, when the voltage of the second signal is higher than the second threshold signal, the second comparator may output a high level, and based on the high level, vgs of the NMOS transistor in the second switch is made to be greater than zero, so as to turn on the source and the gate of the NMOS transistor in the second switch. When the second switch and the NMOS tube in the second switch are both conducted, the loop where the motor 12 and the battery 15 are located is conducted, so that the power supply to the motor 12 is realized, and the electric toothbrush is started.

As an alternative embodiment, a flexible circuit board cable 19 and a flexible circuit board socket 20 are provided inside the handle housing 11 and are connected to the capacitive pressure sensor 13 and the judgment circuit 14, respectively, for transmitting detection signals.

As a specific example, fig. 3 is a schematic view of the structure of an electric toothbrush according to an alternative embodiment of the present utility model, and as shown in fig. 3, a cross-sectional view and an external surface schematic view of the electric toothbrush are shown, respectively. Fig. 4 is a schematic view of the internal structure of an electric toothbrush according to an alternative embodiment of the present utility model, and as shown in fig. 4, the electric toothbrush includes a handle housing 11, a motor 12, a battery 15, a tail cap 16, a printed circuit board 17, a sensor chip 18, a waterproof rubber plug 21, a waterproof support 22, a motor shaft 23, a groove 24 of the motor shaft, a shaft pressure sensor 25, a judging circuit 14, a flexible circuit board flat cable 19 and a flexible circuit board socket 20. When the outer surface of the electric toothbrush handle shell 11 is sunken to sense the slight pressure of a finger, the outer surface of the electric toothbrush handle shell 11 transmits deformation information to the inner surface of the electric toothbrush handle shell 11 through slight deformation, a glue fixing medium firmly adheres the printed circuit board 17 to the inner surface of the electric toothbrush handle shell 11, micro variables transmitted from the inner surface of the electric toothbrush handle shell 11 are firstly transmitted to the printed circuit board 17 and then transmitted to the sensing chip 18 on the printed circuit board 17, the deformation is converted into pressure value change, and the sensing chip 18 simultaneously detects the action of finger pressing through capacitance change. Data collected by the sense die 18. The electric toothbrush is connected to a main board of the electric toothbrush through a flexible circuit board flat cable 19, collected data can be connected with the main board through a flexible circuit board socket 20 and a judging circuit 14, and a sensing chip 18 transmits the collected data to the judging circuit 14 to realize the opening of the electric toothbrush for preventing false touch.

As a specific embodiment, fig. 5 is a block diagram of a key setting principle of an electric toothbrush according to an alternative embodiment of the present utility model, and S101 is a pressure sensing area, as shown in fig. 5, where a user' S pressing and touching may generate micro-miniature variables, and the micro-miniature variables are transferred to the capacitive pressure sensor 13 through a medium. The size of the pressure sensing area can be determined according to the size and effective acting area of the capacitive pressure sensor 13. The depth and radian of the grooves of the pressure sensing area can be determined according to the material medium and the transmission effect of the pressure sensing area. When the pressure sensing area is applied, the identification area needs to be set, so that a user can quickly and accurately find the pressure sensing area, and the pressure sensing area is indicated to the user by adopting identification patterns, touch lines and the like.

S102 is the inner wall of the pressure area, which is the connection area for placing the capacitive pressure sensor 13, and has to be flat and has no interference with surrounding structural members. The depth of the inner wall of the pressure area is related to the medium in the pressure sensing area, and the final depth of the inner wall can be determined by adjusting the sensitivity.

S103 is a glue fixing medium, so that the capacity type pressure sensor 13 can be ensured to be flatly fixed on the inner wall of the pressure area, and the capacity type pressure sensor cannot be loosened due to vibration. When the capacitive pressure sensor 13 is fixed on the inner wall of the pressure area by using glue, a certain glue dispensing amount is taken, firstly, the glue is ensured to be dispensed on the inner wall of the pressure area, and then the capacitive pressure sensor 13 is flatly and firmly attached to the inner wall of the pressure area without bubbles by a jig.

S104 is a capacitive pressure sensor 13, the capacitive pressure sensor 13 integrates a pressure sensing unit and a capacitance sensing unit, the pressure sensing unit is responsible for sensing the variation of the pressure area, and the capacitance sensing unit is responsible for sensing the variation of capacitance, which is also called skin sensing detection. And when the detection results of the two units meet the preset conditions, the key sensing function is triggered, so that the technical effect of avoiding false triggering is realized.

S105 is a circuit board which is a carrier integrating the sensor and the resistance-capacitance component, and different circuit board types can be selected according to different carrier sensors. The capacitive pressure sensor 13 provided by the utility model is made of a hard PCB (printed circuit board) of FR-4, the thickness is as thin as possible, the thickness is about 0.4-0.6mm, the hard PCB is attached to the back surface of the capacitive pressure sensor 13 and is not attached to the surface integrated with components, when the capacitive pressure sensor 13 and the circuit board are attached to the inner wall of a pressure area by using fixed glue, the back surface of the capacitive pressure sensor 13 is connected with the circuit board, and the circuit board is connected with the inner wall of the pressure area.

S106 is FPC winding displacement, and the main function is to connect the circuit board that laminates with capacitive pressure sensor 13 to the master control circuit board to data transmission is to judgement circuit 14 and microcontroller. After the capacitive pressure sensor collects the variable quantity of the two unit data, the variable quantity is transmitted to the judging circuit 14 through the FPC flat cable, the judging circuit 14 judges whether the variable quantity of the two unit data meets the preset condition or not, outputs a judging signal, transmits the judging signal to the main control processor 26, and the main control processor 26 performs algorithm processing and storage so as to determine whether to perform what key-press function or not.

S107 micro control processor: the method mainly processes data acquired by the sensor and adopts certain judgment and key operation functions.

S111 key function: and executing the key function operation after the key triggering condition is met. The basic key function operations include: long press, short press, and false press, wherein the false press does not perform any operation, long press on/off, short press switching mode or gear shift switching.

The utility model also provides a method for controlling the motor drive 27 by the main control processor 26 according to the signal detected by the capacitive pressure sensor 13: firstly, the whole system is powered on, an anti-false touch key system is started, a key pressure trigger threshold value and a skin detection capacitance threshold value are set, namely, a first threshold value signal generating circuit is adjusted to generate a first threshold value signal, and a second threshold value signal generating circuit is adjusted to generate a second threshold value signal; secondly, the capacitive pressure sensor 13 acquires data acquired by the capacitive sensing unit and the pressure sensing unit at any time, and inputs the acquired first signal and second signal to the judging circuit 14 respectively, the judging circuit 14 can judge whether the first signal and the second signal reach the threshold value, when the first signal and the second signal reach the threshold value, the detection signal output by the judging circuit 14 indicates that the key is triggered, and when the first signal and the second signal do not reach the threshold value, the detection signal output by the judging circuit 14 indicates that the key is not triggered; next, the main control processor 26 obtains the detection signal output by the judging circuit 14 at all times, when the detection signal indicates that the key is triggered, the main control processor 26 performs key action analysis according to the first signal and the second signal, judges whether the trigger duration of the key action meets the trigger duration of the long press, if the trigger duration of the long press is met, performs the function of the long press, namely, on-off, if the trigger duration of the long press is not met, then judges whether the trigger duration of the key action meets the trigger duration of the short press, if the trigger duration of the short press is met, performs the function of the short press, namely, switches the working mode or the working gear of the motor 12, and if the trigger duration of the short press is not met, does not perform the key function.

Fig. 6 is a circuit structure diagram of a capacitive pressure sensor 13 according to an alternative embodiment of the present utility model, as shown in fig. 6, the capacitive pressure sensor 13 uses a pmds_f2_dfn10 type chip to perform pressure detection and capacitance detection simultaneously, where pin 1, pin 2 and pin 6 are not connected by a circuit, pin 4 inputs a voltage of 1.8V, pin 5 and pin 8 inputs a voltage of 3.3V, pin 9 is an SDA pin, i.e., a serial data pin, pin 10 is an SCL pin, i.e., a serial clock pin, and the other pins are grounded.

Fig. 7 is a circuit connection diagram of a circuit board according to an alternative embodiment of the present utility model, as shown in fig. 7, a 3.3V voltage is input to a pin 1 of the circuit board, a pin 4 is grounded, a pin 2 is connected to a pin 9 of a capacitive pressure sensor 13, data can be transmitted, and a pin 3 is connected to a pin 10 of the capacitive pressure sensor 13, so that clock signals can be synchronized. After the capacitive pressure sensor 13 is connected to the circuit board in the manner shown in fig. 6 and 7, as shown in fig. 2, the back surface of the circuit board, which is not connected to the sensor, is attached to the pressure sensing inner wall area, so that the change of capacitance and pressure in the pressure sensing inner wall area can be detected simultaneously.

The foregoing embodiment numbers of the present utility model are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.

In the foregoing embodiments of the present utility model, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.

In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in the embodiments of the present utility model may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a non-volatile storage medium. Based on such understanding, the technical solution of the present utility model may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present utility model. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.

Claims

1. An electric toothbrush, comprising:

a handle housing (11), wherein a recess is arranged on the outer surface of the handle housing (11);

a motor (12), the motor (12) being arranged inside the handle housing (11);

the capacitive pressure sensor (13) is arranged on the inner surface of the handle shell (11) at a position corresponding to the recess and is connected with the judging circuit (14), the capacitive pressure sensor (13) comprises a pressure sensing unit and a capacitance sensing unit and is used for generating and outputting a first signal and a second signal to the judging circuit (14), wherein the first signal is a signal generated by the pressure sensing unit for detecting pressure change at the recess position, and the second signal is a signal generated by the capacitance sensing unit for detecting whether the recess position is contacted with a preset medium;

the judging circuit (14) is respectively connected with the capacitive pressure sensor (13) and the main control processor and is used for outputting detection signals to the main control processor (26) according to the first signals and the second signals;

the main control processor (26) is arranged inside the handle shell (11), connected with the judging circuit (14) and used for generating a control instruction for controlling the motor drive (27) when the detection signal meets the preset condition;

one end of the motor drive (27) is connected with the main control processor (26), and the other end of the motor drive (27) is connected with the motor (12) and is used for driving the motor (12) according to the received control instruction;

a battery (15) disposed inside the handle housing (11) for powering the motor (12), the main control processor (26), the motor drive (27) and the capacitive pressure sensor (13);

and the tail cover (16) is arranged at the bottom of the handle shell (11).

2. The electric toothbrush according to claim 1, characterized in that the handle housing (11) comprises:

and the groove is arranged on the inner surface of the handle shell (11) at a position corresponding to the recess.

3. The electric toothbrush according to claim 2, characterized in that the capacitive pressure sensor (13) is arranged at the geometric center of the recess.

4. The electric toothbrush according to claim 2, characterized in that the material of the handle housing (11) and the thickness of the handle housing (11) between the recess and the groove are any one of the following combinations:

the handle shell (11) is made of polycarbonate, and the thickness of the handle shell (11) between the concave part and the groove is not more than 2mm;

the handle shell (11) is made of glass, and the thickness of the handle shell (11) between the concave and the groove is not more than 5mm;

the handle shell (11) is made of stainless steel, and the thickness of the handle shell (11) between the concave and the groove is not more than 1mm;

the handle shell (11) is made of aluminum, and the thickness of the handle shell (11) between the concave and the groove is not more than 5mm;

the material of the handle shell (11) is acrylonitrile-butadiene-styrene plastic, and the thickness of the handle shell (11) between the concave and the groove is not more than 5mm.

5. The powered toothbrush as defined in claim 2, wherein the recess has a depth of no greater than 0.4mm.

6. The electric toothbrush according to claim 2, characterized in that the recess is rectangular, the distance between the capacitive pressure sensor (13) and any rim of the recess being greater than 0.3mm.

7. The electric toothbrush according to any one of claims 2 to 6, characterized in that it comprises:

the capacitive pressure sensor comprises a plurality of capacitive pressure sensors (13), a plurality of grooves and a plurality of recesses, wherein the plurality of grooves are respectively in one-to-one correspondence with the plurality of recesses, and the plurality of capacitive pressure sensors (13) are respectively arranged in the plurality of grooves.

8. The electric toothbrush according to any one of claims 4 to 6, wherein a distance between adjacent two of the plurality of grooves is not less than 5mm.

9. The electric toothbrush according to any one of claims 1 to 6, characterized in that the capacitive pressure sensor (13) is a semiconductor-type capacitive pressure sensor.

10. The electric toothbrush according to claim 1, characterized in that the capacitive pressure sensor (13) comprises:

a printed circuit board (17) and a sensing chip (18), wherein the sensing chip (18) is arranged on the surface of the printed circuit board (17).

11. The electric toothbrush according to claim 10, characterized in that the printed circuit board (17) is arranged between the inner surface of the handle housing (11) and the sensor chip (18).

12. The electric toothbrush according to any one of claims 10 or 11, characterized in that the printed circuit board (17) is made of glass fiber epoxy resin material with a thickness of 0.4mm-0.6mm.

13. The electric toothbrush according to claim 1, characterized in that the judging circuit (14) includes: a first switch and a second switch, wherein when the first switch and the second switch are both opened, the judging circuit (14) outputs the detection signal to the main control processor (26), wherein,

the first switch is used for judging whether the first signal reaches a first threshold value, and when the first signal reaches the first threshold value, the first switch is opened;

and the second switch is used for judging whether the second signal reaches a second threshold value, and when the second signal reaches the second threshold value, the second switch is opened.

14. The powered toothbrush as defined in claim 1, further comprising:

the flexible circuit board flat cable (19) and the flexible circuit board socket (20) are arranged in the handle shell (11) and are respectively connected with the capacitive pressure sensor (13) and the judging circuit (14) for transmitting the detection signals.