WO2020238421A1 - 声波类电动清洁护理器具、用于该类器具的压力报警装置 - Google Patents

声波类电动清洁护理器具、用于该类器具的压力报警装置 Download PDF

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Publication number
WO2020238421A1
WO2020238421A1 PCT/CN2020/083634 CN2020083634W WO2020238421A1 WO 2020238421 A1 WO2020238421 A1 WO 2020238421A1 CN 2020083634 W CN2020083634 W CN 2020083634W WO 2020238421 A1 WO2020238421 A1 WO 2020238421A1
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WO
WIPO (PCT)
Prior art keywords
drive shaft
lever
transducer
lower bearing
bearing
Prior art date
Application number
PCT/CN2020/083634
Other languages
English (en)
French (fr)
Inventor
戴晓国
徐振武
Original Assignee
上海携福电器有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海携福电器有限公司 filed Critical 上海携福电器有限公司
Priority to ES20814010T priority Critical patent/ES2961645T3/es
Priority to US17/614,305 priority patent/US20220258206A1/en
Priority to CA3139628A priority patent/CA3139628C/en
Priority to JP2021570929A priority patent/JP7395621B2/ja
Priority to EP20814010.3A priority patent/EP3960124B1/en
Publication of WO2020238421A1 publication Critical patent/WO2020238421A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/20—Power-driven cleaning or polishing devices using ultrasonics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/225—Handles or details thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/24—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like rotating continuously
    • A61C17/26—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like rotating continuously driven by electric motor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • A61C17/3409—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
    • A61C17/3418—Rotation around the axis of the toothbrush handle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/32—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating
    • A61C17/34—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor
    • A61C17/3409—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like reciprocating or oscillating driven by electric motor characterized by the movement of the brush body
    • A61C17/3481—Vibrating brush body, e.g. by using eccentric weights
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
    • H02K33/18—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with coil systems moving upon intermittent or reversed energisation thereof by interaction with a fixed field system, e.g. permanent magnets

Definitions

  • the invention relates to a sound wave electric cleaning and nursing appliance with a pressure alarm device.
  • the invention also relates to a pressure alarm device for the sound wave cleaning and nursing appliance.
  • Existing electric cleaning appliances are classified according to the movement mode of the head assembly. They can generally be divided into the cleaning element on the head assembly and the cleaning element carrier for reciprocating linear motion (including swinging up and down or swinging left and right), and the head
  • the cleaning element and the cleaning element carrier on the assembly perform reciprocating rotation, and the entire head assembly performs reciprocating rotation (referred to as acoustic waves for short).
  • the cleaning and nursing appliance includes a handle with a handle housing, and the inside of the handle housing is equipped with a power supply part for supplying power to various parts of the cleaning and nursing appliance to control the cleaning and nursing appliance.
  • the driver includes a transducer, a driving coil, and a driving coil iron core arranged in the driving coil.
  • the driving coil is energized with an alternating current i
  • the permanent magnets distributed on the transducer receive the reaction force of the electromagnetic force and drive the transducer to perform reciprocating rotation at the frequency of the alternating current, thereby driving the assembly to the transducer
  • the cleaning element carrier on the drive shaft and the cleaning elements distributed on the cleaning element carrier make a reciprocating rotation to achieve a cleaning action.
  • the transducer, the cleaning element carrier, and the cleaning element have a natural frequency f solid
  • the current in the driving coil has a driving frequency f 0
  • f solid and f 0 are very close, usually making it meet 0.85 f 0 ⁇ f Solid ⁇ 1.05f 0
  • the electromagnetic force between the driving coil and the transducer can make the transducer, the cleaning element carrier and the cleaning element be in a resonance state, so that higher mechanical efficiency can be obtained.
  • the transducer includes at least two transducer elastic members (the left transducer elastic member and the right transducer elastic member), and the bending strain of the elastic material is used to form a transducer with a natural vibration frequency f solid .
  • the driving coil handle housing is generated and electromagnetic force acting on the transducer so that the transducer in the resonant state, when the transducer inherent
  • the electromagnetic force generated by the driving coil in the handle housing and acting on the transducer makes the transducer in a resonance state.
  • the invention patent titled "electric cleaning and nursing appliance, pressure alarm method and device for the appliance” the disclosed pressure alarm device includes detection, collection and alarm circuits and alarms Components, the circuit includes a power supply, a programmable microchip processor IC, and an H-bridge circuit composed of transistors to connect the power supply and the driving coil.
  • the program of the microchip processor IC stores f 0max -n, Take f 0max -n corresponding to the selected value of n as the fixed frequency f 0 of the current flowing in the drive coil, where -0.3(f 0max -f 0min ) ⁇ n ⁇ 0.85(f 0max -f 0min ), f 0max is the drive coil current frequency corresponding to the maximum value of the average voltage on the current detection resistor, f 0min is the drive coil current frequency corresponding to the minimum value of the average voltage on the current detection resistor, and the power supply voltage under alarm load is pre-stored
  • the average value U L source and the average voltage U LR25 on the current detection resistor R 25 the programmable microchip processor IC outputs a square wave with a fixed frequency f 0 to drive the H-bridge circuit, if (U N source /U L source ) ⁇ U NR25 >U LR25 , there is no alarm signal output or the current pressure alarm signal output is terminate
  • the photosensitive pressure alarm device includes at least one light source and at least one photosensitive The light sensing part of the unit, the light reflecting surface facing the light source and the photosensitive unit, the detection circuit and the alarm part.
  • the light source and the photosensitive unit are arranged on a movable part that is movable relative to the handle housing or a stationary part that does not move relative to the handle housing and are on the same side, and the light reflecting surface is arranged on the side facing the light source and the photosensitive unit
  • the stationary part or the movable part is roughly facing the light source and photosensitive unit.
  • the combined action of the external force F 1 applied to the cleaning element and the direction is approximately along or parallel to the axis along the length of the cleaning element and the elastic force F 2 generated by the elastic element built in the handle against the external force F 1 ,
  • the light source and photosensitive unit or the light reflecting surface arranged on the movable part that is movable relative to the handle housing move with the movable part, and the incident angle and the reflection angle of the light emitted by the light source on the light reflecting surface occur
  • the change causes the light-receiving area of the photosensitive unit that can receive the light from the light source to change, which in turn causes the electrical performance of the photosensitive unit to change.
  • an electric toothbrush with a pressure sensor which includes: a system for determining the pressure exerted by the bristles of the toothbrush on the user's teeth through direct force measurement; A system for determining the pressure exerted by the bristles of a toothbrush on the teeth of a user by dynamic force measurement; and a processing system for adjusting a pre-established amount of pressure indicating excessive bristle force in response to the pressure determined by direct force measurement and dynamic force measurement .
  • the direct force or displacement information is provided by the Hall effect sensor device, and the dynamic load information is also provided by the Hall effect sensor, which is used to measure the phase shift between the magnetic field response and the phase of the drive signal .
  • the task of the present invention is to provide a sonic electric cleaning and nursing appliance with a pressure alarm device, which can greatly improve the detection accuracy of the load pressure on the cleaning element without increasing the volume and cost of the cleaning and nursing appliance, thereby Improve the sensitivity of the pressure alarm device.
  • the provided sonic electric cleaning and care appliance includes a handle with a handle shell and a handle rear shell.
  • the handle shell contains a power supply, a circuit board, a transducer, a drive coil assembly, a cleaning element carrier and a cleaning element.
  • the transducer comprising: a drive shaft inserted into the cleaning assembly, the transducer left, right stand, the at least two transducers are arranged in the right and left L 1 sides of the permanent magnet drive shaft longitudinal axis, corresponding permanent magnet A bracket, left and right transducer transmission arms fixedly connected to the permanent magnet bracket and fixedly connected to the drive shaft, at least two transducer elastic members respectively arranged on the left and right sides of the longitudinal axis L 1 of the drive shaft, and At least one fixing part of the transducer elastic part fastened to the left and right brackets of the transducer, one end of the transducer elastic part is respectively fixedly connected with the fixing part of the transducer elastic part, and the transducer is elastic The other ends of the parts are respectively fixedly connected to the corresponding transducer transmission arms.
  • the left and right permanent magnets are independent of each other.
  • the magnetic pole polarity of the permanent magnet on one side is facing the driving coil and the permanent magnet on the other side is facing the driving coil.
  • the polarities of the magnetic poles are opposite, the left and right permanent magnets can move relative to the fixed part of the transducer elastic part; the drive shaft is fixed with the upper bearing of the drive shaft and the lower bearing of the drive shaft respectively, and the upper bearing of the drive shaft passes through located on the left of the transducer.
  • the fixing surface of the bearing on the drive shaft on the right bracket is fixed in the transducer bracket and cannot move relative to the bearing fixing surface on the drive shaft, the lower bearing of the drive shaft and the upper fixing surface of the drive shaft lower bearing and the lower bearing of the drive shaft
  • the lower fixing surfaces are related to each other.
  • the lower bearing of the drive shaft is fixed in the transducer bracket through the upper fixing surfaces of the lower bearing of the drive shaft located on the left and right brackets of the transducer, so the lower bearing of the drive shaft can be relative to the lower bearing of the drive shaft.
  • the fixed surface or the lower fixed surface of the lower bearing of the drive shaft performs relative movement to realize the separation or contact between the lower bearing of the drive shaft and the upper fixed surface of the lower bearing of the drive shaft on the left and right brackets of the transducer; the cleaning and care appliance also It includes a photosensitive pressure alarm device, which includes a lever installed on the left and right brackets of the transducer, a light-emitting element arranged on the circuit board and adjacent to the lever, and a photosensitive element arranged on the circuit board and adjacent to the lever.
  • the lever is arranged with a lever shielding surface and/or light shielding protrusion in the direction toward the circuit board, and the change in the gap between the lever shielding surface and/or the light shielding protrusion and the photosensitive element causes the light emitting element to reach the photosensitive element through the gap.
  • the light energy of the element changes, and the corresponding electrical performance parameters of the photosensitive element are detected to obtain the load pressure F 1 applied to the cleaning element.
  • the upper fixed surface of the lower bearing of the drive shaft and the lower fixed surface of the lower bearing of the drive shaft can restrict the lower bearing of the drive shaft to only be restricted to rotate around the lateral rotation axis L 4 of the drive shaft, that is, the lower bearing of the drive shaft cannot simultaneously contact the drive
  • the upper fixing surface of the lower bearing of the shaft and the lower fixing surface of the lower bearing of the drive shaft When the lower bearing of the drive shaft contacts the lower fixed surface of the lower bearing of the drive shaft, the lower bearing of the drive shaft and the drive shaft rotate counterclockwise around the drive shaft transverse rotation axis L 4 to the maximum angle, which is the limited angle of the drive shaft rotation .
  • the restricted rotation angle of the drive shaft may be 0- ⁇ 2 degrees, preferably the restricted rotation angle is 0- ⁇ 1.5 degrees, and more preferably the restricted rotation angle is 1 degree.
  • the left and right sides of the lever are respectively provided with left and right rotation shafts of the lever, and the lever is in a direction away from the rotation axis L 3 of the lever and approaching the cleaning assembly, and in the direction toward the lower bearing of the drive shaft.
  • a protrusion of the short arm of the lever is provided on the upper bearing, and the lower bearing of the drive shaft supports the protrusion of the short arm of the lever. It is arranged in a direction away from the lever rotation axis L 3 and close to the rear shell of the handle, and in the direction toward the lower bearing of the drive shaft.
  • There is a protrusion of the long arm of the lever and the spring surrounds the protrusion of the long arm of the lever.
  • the bottom plane of the long arm of the lever supports one end of the spring.
  • the bottom plane of the spring bearing hole provided on the left and right supports of the transducer supports the The other end of the spring.
  • the left and right rotation shafts of the lever have the same lever rotation axis L 3 .
  • the electric cleaning and nursing appliances include a handle with a handle shell and a handle back shell.
  • the handle shell contains a power supply, a circuit board, and a transducer.
  • the transducer, the drive coil assembly, the cleaning assembly including the cleaning element carrier and the cleaning element, the transducer includes: a drive shaft inserted into the cleaning assembly, the left and right brackets of the transducer, the drive shafts are respectively fixed with a drive The bearing on the shaft and the lower bearing on the drive shaft.
  • the pressure alarm device includes a lever installed on the left and right brackets of the transducer, a light emitting element arranged on the circuit board and adjacent to the lever, and a light emitting element arranged on the circuit board and adjacent to the lever.
  • a photosensitive element, the lever is arranged with a lever shielding surface and/or a light shielding protrusion in the direction toward the circuit board, the left and right sides of the lever are respectively provided with the left and right rotation shafts of the lever, and the lever is moved away from the lever rotation axis L 3 direction of approaching the cleaning assembly, the drive shaft and toward the projection is provided on the short arm of the lever bearing position, the shaft bearing supporting the short arm of the lever protrusion, along the axis of rotation of the lever away from the L 3 and close to the rear handle housing
  • a projection of the long arm of the lever is provided in the direction toward the lower bearing of the drive shaft, a spring is provided around the projection of the long arm of the lever, and the bottom plane of the projection of the long lever arm supports one end of
  • the length of the long arm of the lever is X2
  • the length of the short arm of the lever is X1
  • the ratio of X2 to X1 is in the range of 1.5-5; more preferably, the ratio of X2 to X1 is in the range of 2-4.
  • Adopting the sonic electric cleaning and nursing appliance with pressure alarm device provided by the present invention and the pressure alarm device for the sonic cleaning and nursing appliance can greatly improve the detection and application without increasing the volume and cost of the cleaning and nursing appliance.
  • the limited angle of rotation of the drive shaft is determined by setting the upper fixing surface of the lower bearing of the drive shaft and the lower fixing surface of the lower bearing of the drive shaft, so that the load of the elastic member is effectively controlled, thereby effectively reducing or eliminating the load of the elastic member. The effect of deformation on the life of the transducer.
  • the present invention uses a sonic electric toothbrush (hereinafter referred to as electric toothbrush) as an example to explain the cleaning and nursing appliance.
  • electric toothbrush a sonic electric toothbrush
  • Figure 1 is a schematic diagram of the electric toothbrush of the present invention
  • FIG. 2 is a schematic diagram of the assembly of the electric toothbrush shown in FIG. 1, which shows the assembly relationship between the handle part and the head assembly;
  • FIG 3 is a schematic diagram of the transducer of the electric toothbrush in Figure 2;
  • FIG. 4 is a schematic diagram of the combination of the transducer, the drive coil, the circuit board and the lever of the electric toothbrush in an empty state on the cleaning element shown in FIG. 1;
  • Figure 5 is a schematic diagram of the combination of the electric toothbrush transducer, the drive coil, the circuit board and the lever when the cleaning element shown in Figure 1 is loaded;
  • Fig. 6 is a partial enlarged schematic diagram of Fig. 4;
  • Fig. 7 is a partial enlarged schematic diagram of Fig. 5;
  • Figure 8 is a schematic diagram of the combination of the right bracket of the transducer, the lever and the lower bearing of the drive shaft;
  • Figure 9 is a schematic diagram of the combination of the right bracket of the transducer and the lower bearing of the drive shaft;
  • Figure 10 is a schematic diagram of the right bracket of the transducer
  • Figure 11 is a schematic diagram of leverage
  • Fig. 12 is a schematic diagram of the combination of the lever and the circuit board when the cleaning element shown in Fig. 1 is in a load state;
  • Figure 13 is a schematic diagram of the combination of the lever and the circuit board when the cleaning element shown in Figure 1 is in an unloaded state;
  • Figure 14 is a schematic diagram of the combination of the drive shaft and the lower bearing of the drive shaft when the drive shaft is in an idling state and a loaded state;
  • 15 is a schematic diagram of the combination of the lever and the circuit board when the cleaning element is in an idling state in another embodiment of the present invention.
  • Fig. 16 is a schematic diagram of the combination of the lever and the circuit board when the cleaning element is in a load state in the embodiment shown in Fig. 15.
  • 35 is the right permanent magnet of the transducer
  • X 1 is the length of the short arm of the lever
  • X 2 is the length of the long arm of the lever
  • L 1 is the longitudinal axis of the drive shaft
  • L′ 1 is the longitudinal axis of the drive shaft when the drive shaft is inclined relative to the longitudinal axis of the bearing on the drive shaft
  • L 2 is the transverse axis of the bearing on the drive shaft that passes through the center point of the bearing on the drive shaft, which is perpendicular to the longitudinal axis of the drive shaft L 1 and approximately parallel to the longitudinal axis of the cleaning element L 5
  • L 3 is the lever rotation axis
  • L 4 is the transverse axis of rotation of the drive shaft perpendicular to the transverse axis of the bearing on the drive shaft L 2 and the longitudinal axis of the drive shaft
  • L 5 is the longitudinal axis of the cleaning element
  • F 1 is the load pressure exerted on the cleaning element
  • F 2 is the load force transmitted to the protrusion of the short arm of the lever
  • F 3 is the spring force on the protrusion on the long arm of the lever
  • M 1 is the rotational moment
  • M 2 is the moment of the short arm of the lever
  • M 3 is the moment of the long arm of the lever
  • the sonic electric toothbrush is taken as a typical example of the sonic electric cleaning and care appliance of the present invention, and the exemplary embodiments of the present invention are described in more detail with reference to the accompanying drawings.
  • an electric toothbrush is taken as an example for explanation, the present invention is not limited to this.
  • the present invention is also applicable to sonic electric razors, sonic electric facial cleansers, sonic electric showers, and other sonic electric cleaning and nursing appliances for individuals.
  • the sonic electric toothbrush of the present invention includes a handle with a handle housing 13 inside the handle housing 13 is equipped with a battery 10 to provide power to various parts of the toothbrush, to control the opening or closing of the toothbrush and various Working mode circuit board 11, transducer 3 used to convert input electrical energy into mechanical energy output, drive coil assembly 4, cleaning assembly including cleaning element carrier and cleaning elements (ie bristles) 21 distributed on the cleaning element carrier 2.
  • the cleaning assembly 2 is detachably coupled with the drive shaft 37 ( Figures 4 and 5).
  • the transducer 3 includes: a drive shaft 37 inserted into the cleaning assembly; at least one fixing member 39 (Fig.
  • the left and right transducer elastic members 38 are respectively fixedly connected with the fixing member 39 of the transducer elastic member, and the other ends of the left and right transducer elastic members 38 are respectively fixedly connected with the corresponding transducer transmission arm .
  • the left and right permanent magnets 36 and 35 are independent of each other.
  • the magnetic pole polarity of one permanent magnet facing the driving coil is S-pole or N-pole, and the magnetic pole polarity of the other permanent magnet facing the driving coil is the same as the one.
  • the poles of the side permanent magnets are opposite, and the left and right permanent magnets 36 and 35 can move relative to the fixed part 39 of the elastic part of the transducer.
  • the drive shaft 37 is respectively fixed with a drive shaft upper bearing 33 and a drive shaft lower bearing 34.
  • the drive shaft upper bearing 33 is driven by the drive on the left and right brackets 5 and 7 of the transducer.
  • the bearing fixing surface 75 on the shaft is fixed in the transducer supports 5 and 7 and cannot move relative to the bearing fixing surface 75 on the drive shaft.
  • the lower bearing 34 of the drive shaft and the lower bearing upper fixing surface 73 of the drive shaft and the lower drive shaft The lower bearing fixing surfaces 76 are associated with each other, and the drive shaft lower bearing 34 is fixed in the transducer bracket 5, 7 through the drive shaft lower bearing upper fixing surface 73 located on the left and right brackets 5, 7 of the transducer, thus the drive shaft
  • the lower bearing 34 can move relative to the upper fixed surface 73 of the lower bearing of the drive shaft or the lower fixed surface 76 of the lower bearing of the drive shaft to realize the lower bearing 34 of the drive shaft and the lower drive shaft on the left and right brackets 5 and 7 of the transducer.
  • the separation or contact between the fixed surfaces 73 of the bearing is associated with each other, and the drive shaft lower bearing 34 is fixed in the transducer bracket 5, 7 through the drive shaft lower bearing upper fixing surface 73 located on the left and right brackets 5, 7 of the transducer, thus the drive shaft
  • the lower bearing 34 can move relative to the upper fixed surface 73 of the lower bearing of the drive shaft or the lower fixed
  • a cavity is formed on the upper fixing surface 73 of the lower bearing of the drive shaft on the left and right brackets 5 and 7 of the transducer.
  • the volume of the cavity is larger than that of the lower bearing of the drive shaft, so the lower bearing of the drive shaft can be accommodated in the cavity. in.
  • the lower bearing 34 of the drive shaft can perform limited movement relative to the upper fixing surface 73 of the lower bearing of the drive shaft or the lower fixing surface 76 of the lower bearing of the drive shaft. Due to the internal clearance (play) of the bearing, the drive shaft 37 can be inclined with respect to the longitudinal axis of the bearing 33 on the drive shaft, as shown in FIG. 14.
  • the longitudinal axis L 1 of the drive shaft 37 coincides with the longitudinal axis of the bearing 33 on the drive shaft; when the drive shaft 37 is under the external force F
  • the longitudinal axis L' 1 of the drive shaft of the drive shaft 37 is tilted relative to the longitudinal axis of the bearing 33 on the drive shaft, and the angle between the two axes is ⁇ ( Figure 14), ⁇ is the inclination angle of the bearing, usually the angle ⁇ is less than 2 degrees.
  • the drive shaft 37 rotates counterclockwise around the drive shaft transverse rotation axis L 4 (not shown in the figure) under the action of the rotational torque M 1 with the O 1 point as the base point, as shown in FIG. 7, is fastened to the drive shaft 37
  • the lower bearing 34 of the drive shaft also rotates counterclockwise around the lateral rotation axis L 4 of the drive shaft with the O 1 point as the base point under the action of the rotation moment M 1 formed by the load pressure F 1 applied to the cleaning element 21.
  • the right and left transducer carrier 5,7 is arranged at the drive shaft is fixed on the bearing surface 73, the bearing shaft 34 by a rotational moment M 1 O 1 is capable of lateral rotation about the drive base point
  • the axis L 4 rotates counterclockwise to a limited angle of rotation of the drive shaft.
  • the restricted angle is preferably 1.5 degrees, more preferably 1 degree.
  • the restricted angle of rotation of the drive shaft is selected to be 1 degree. In other embodiments, the restricted angle may also be any other angle between 0 degree and 2 degrees.
  • the lower bearing 34 of the drive shaft is provided with an upper fixing surface 73 used to limit the rotation angle of the drive shaft.
  • the shaft bearing is fixed on the driving shaft 73 in surface contact with the outer surface of the lower bearing 34, the bearing 34 of the drive shaft and to limit further rotation.
  • a lever 32 is installed on the left and right brackets 5 and 7 of the transducer.
  • the left and right sides of the lever 32 are respectively provided with a lever left rotating shaft 321 and a lever rotating right.
  • the shaft 322, the left and right rotation shafts 321 and 322 of the lever have the same lever rotation axis L 3 .
  • the lever 32 is provided on the short arm of the lever.
  • the long arm of the lever 32 is provided with a projection 324 of the lever.
  • the length of the lever arm from the point of force of the protrusion 323 of the short arm of the lever to the lever rotation axis L 3 is the length of the lever arm’s short arm X 1 , and the force point of the protrusion 324 of the lever’s long arm to the lever arm of the lever rotation axis L 3
  • the length is the length of the long arm of the lever X 2 .
  • a raised through hole 74 ( Figure 9) is provided on the right bracket 7 ( Figure 2) of the transducer, and a raised through hole is also arranged on the left bracket 5 ( Figure 2) of the transducer.
  • 323 passes through the two protruding through holes to contact the lower bearing 34 of the drive shaft, and the lower bearing 34 of the drive shaft supports the protrusion 323 of the short arm of the lever.
  • the spring 31 ( Figure 4) surrounds the outside of the protrusion 324 of the long arm of the lever.
  • the spring 31 can be a cylindrical spring.
  • the bottom plane 326 of the protrusion of the long arm of the lever supports one end of the spring 31 and is arranged on the left and right brackets 5, The bottom plane 77 (FIG.
  • the lever right rotation shaft 322 is matched with the lever fixing hole 71 provided on the right bracket 7 of the transducer, and the left rotation shaft 321 of the lever is connected with the left bracket 5 provided on the transducer.
  • the upper lever fixing holes 71 are matched, and the above two lever fixing holes 71 restrict the lever 32 to only rotate around the lever rotation axis L 3 .
  • the lever 32 is provided with a lever shielding surface 325 in the direction facing the circuit board 11.
  • the light emitting element 112 installed on the circuit board 11 and adjacent to the lever 11 emits The light from ⁇ can reach the photosensitive element 111 through the gap between the lever shielding surface 325 and the photosensitive element 111 installed on the circuit board 11 and adjacent to the lever 11.
  • the lever 32 rotates around the lever under the combined action of the load force F 2 on the protrusion of the short arm of the lever and the spring force F 3 on the long arm of the lever.
  • the axis L 3 rotates clockwise, the gap between the lever shielding surface 325 and the photosensitive element 111 is gradually reduced, so that the light energy emitted by the light emitting element 112 reaches the photosensitive element 111 through the gap between the lever shielding surface 325 and the photosensitive element 111 cut back.
  • the lower bearing 34 of the drive shaft When the lower bearing 34 of the drive shaft is under the action of the moment opposite to the direction of the rotational moment M 1 , or under the action of the spring force F 3 formed on the protrusion 324 of the long arm of the lever, it drives around the O 1 point as the base point
  • the shaft transverse rotation axis L 4 rotates clockwise until the lower fixed surface 76 of the lower bearing of the drive shaft contacts the lower bearing 34 of the drive shaft, the lower bearing 34 of the drive shaft is restricted from further rotation.
  • the longitudinal axis L 1 of the drive shaft 37 and the upper bearing of the drive shaft The longitudinal axes of 33 coincide, and this state is the initial state of the drive shaft 37.
  • the cleaning element 21 When the cleaning element 21 is in an idling state, the drive shaft 37 is in the initial state.
  • the bending deformation of the left and right transducer elastic members 38 is used to respond to the movement of the left and right transducer permanent magnets 36 and 35, so that the elastic system composed of the transducer 3 and the cleaning assembly 2 is
  • the alternating electromagnetic force from the driving coil 42 generates resonance to realize the efficient reciprocating rotation of the cleaning element 21.
  • the drive shaft 37 can be tilted relative to the bearing 33 on the drive shaft, and the left and right transducer transmission arms are tilted relative to the longitudinal axis of the bearing 33 on the drive shaft.
  • the side transducer elastic member 38 is inclined with respect to the longitudinal axis of the bearing 33 on the drive shaft, while the bearing 33 on the drive shaft and the fixing member 39 of the transducer elastic member are stationary with respect to the left and right brackets 5 and 7 of the transducer.
  • the elastic parts of the left and right transducers 38 are deformed relative to the fixing parts 39 of the elastic parts of the transducer, that is, the load pressure F 1 applied to the cleaning element 21 will cause the elastic parts of the left and right transducers 38 to deform.
  • the above-mentioned deformation is called elastic member load deformation.
  • the deformation of the left and right transducer elastic elements 38 driven by the left and right transducer permanent magnets 36 and 35 is called elastic element driving deformation.
  • the function of the elastic member driving deformation is to transfer the mechanical energy of the left and right transducer permanent magnets 36 and 35 to the cleaning element 21, and the load deformation of the elastic member does not help the cleaning element 21 to obtain mechanical energy. Excessive load deformation of the elastic member will also aggravate the fatigue aging of the elastic member of the transducer, causing the elastic member 38 of the transducer to fatigue and fracture in a short time, resulting in the failure of the electric cleaning and nursing appliance.
  • the limited angle of rotation of the drive shaft is determined, so that the elastic member load is effectively controlled, thereby effectively reducing or eliminating the elastic member load.
  • the lower bearing 34 of the drive shaft is effectively used to restrict rotation around the lateral rotation axis L 4 of the drive shaft to implement the pressure alarm function.
  • the drive coil 42 passes an alternating current with a frequency of f 0 , the left and right transducer permanent magnets 36 and 35 reciprocate around the longitudinal axis L 1 of the drive shaft, and the left and right transducer permanent magnets 36 , drive shaft 35 about the shaft 37 is reciprocally rotated longitudinal axis L 1, the drive shaft 37 to drive the cleaning member cleaning assembly 2 about the drive shaft 21 is reciprocally rotated longitudinal axis L 1.
  • the load force transmitted to the drive shaft 37 is zero
  • the longitudinal axis L 1 of the drive shaft coincides with the longitudinal axis of the bearing 33 on the drive shaft, and the drive shaft 37 is in the initial state.
  • the spring 31 is in a pre-compressed state, the pre-tensioning force of the spring 31 pushes the lever 32 to rotate around the lever rotation axis L 3 , so that the protrusion 323 of the short arm of the lever is pressed against the bearing 33 on the drive shaft, and the bearing 33 on the drive shaft is received
  • the force from the spring 31 is close to the lower fixed surface 76 of the lower bearing of the drive shaft, the gap between the lever shielding surface 325 on the lever 32 and the photosensitive element 111 reaches the maximum, and the photosensitive element 111 receives the light energy from the light-emitting element 112 to the maximum ,
  • the corresponding electrical parameter (such as resistance value) of the photosensitive element 111 reaches the minimum value.
  • the gap between the lever shielding surface 325 on the lever 32 and the photosensitive element 111 becomes smaller
  • the photosensitive element 111 receives the light energy from the light-emitting element 112
  • the light energy becomes smaller
  • the corresponding electrical parameter (such as resistance value) of the photosensitive element 111 becomes larger.
  • the load pressure F 1 applied to the cleaning element 21 causes the elastic member 38 of the transducer to form a load deformation of the elastic member.
  • the elastic element 38 of the transducer is fatigued and aging, and the elastic element 38 of the transducer is fatigued and fractured in a short time, which in turn leads to the failure of the electric cleaning and nursing appliance. At the same time, in the process of cleaning the teeth, applying excessive load pressure F 1 on the cleaning element 21 will also cause damage to the gums.
  • the drive shaft 37 is fastened with the drive shaft upper bearing 33 and the drive shaft lower bearing 34, and the drive shaft upper bearing 33 is fixed in the left and right brackets 5 and 7 of the transducer to make The bearing 33 on the drive shaft and the left transducer support 5 and the right transducer support 7 cannot move relatively.
  • the lower bearing 34 of the drive shaft is also fixed in the left and right brackets 5 and 7 of the transducer, the lower bearing 34 of the drive shaft can move limitedly relative to the left and right brackets 5 and 7 of the transducer.
  • the upper fixing surface of the lower bearing of the drive shaft 73 and the lower fixing surface 76 of the drive shaft can restrain the lower bearing of the drive shaft.
  • 34 can only perform limited rotation about the lateral rotation axis L 4 of the drive shaft.
  • the maximum angle of counterclockwise rotation of the lower bearing 34 of the drive shaft and the drive shaft 37 about the transverse rotation axis L 4 of the drive shaft is formed, and the maximum angle is the drive The axis rotation is limited by the angle.
  • the maximum value of the limited angle of rotation of the drive shaft is 2 degrees, preferably 1.5 degrees, and more preferably 1 degree.
  • the lower bearing 34 of the drive shaft supports the protrusion 323 of the short arm of the lever.
  • the convex bottom surface 326 of the long arm of the lever bears the pressure of the spring 31.
  • Left lever rotation shaft 321, a right rotation of the lever and the lever shaft 322 is arranged on the right and left transducer carrier with 5,7 fixing hole 71, the lever 32 can only L 3 is rotated about the axis of rotation of the lever.
  • the load pressure F 1 applied to the cleaning element 21 causes the lower bearing 34 of the drive shaft to rotate counterclockwise about the transverse rotation axis L 4 of the drive shaft, and the lower bearing 34 of the drive shaft pushes the protrusion 323 of the short arm of the lever, causing the lever 32 to rotate around the lever axis of rotation.
  • the micro-control unit MCU on the circuit board 11 can correspondingly detect the magnitude of the load pressure F 1 on the cleaning element 21 by detecting changes in the corresponding electrical parameters (such as resistance value) of the photosensitive element 111.
  • the handle 1 can remind the user that the load pressure F 1 on the cleaning element 21 is too large through sound, light, vibration, etc., or directly
  • the electric toothbrush is processed to reduce the speed or shut down, so as to effectively protect the user's gums.
  • the ratio of the length X 2 of the long lever arm of the lever 32 to the length X 1 of the short lever arm can be used to magnify the correspondence between the load pressure F 1 applied to the cleaning element 21 and the displacement of the lower bearing 34 of the drive shaft.
  • the gap between the lever shielding surface 325 on the lever 32 and the photosensitive element 111 has a greater change, and the electrical parameter (such as resistance) corresponding to the photosensitive element 111 has a larger change value, thereby greatly improving the cleaning element 21 F on the load pressure detection precision of 1.
  • the ratio of the length X 2 of the long arm of the lever to the length X 1 of the short arm of the lever is in the range of 1.5-5, preferably 2-4.
  • the geometric relationship between the photosensitive element 111 and the light-emitting element 112 and the lever 32 is not limited to the foregoing embodiment.
  • a light-shielding protrusion 327 is provided on the lever 32.
  • the light-shielding protrusion 327 extends from the lever 32 to the circuit board 11, and the light-shielding protrusion 327 is interposed between the photosensitive element 111 and Between the light-emitting elements 112, the light-shielding protrusions 327 can block the photosensitive element 111 from obtaining light from the light-emitting element 112.
  • the specific analysis is the same as that of the previous embodiment, and will not be repeated here.
  • the positions of the photosensitive element 111 and the light emitting element 112 of the circuit board 11 can be interchanged, which can also achieve the objective of the present invention and achieve the same technical effect.
  • a light-shielding surface 325 and/or a light-shielding protrusion 327 are provided on the lever 32, and a light-emitting element 112 and a photosensitive element 111 are provided on the circuit board.
  • the lower drive shaft bearing 34 on the drive shaft 37 rotates around the lever rotation axis L 3 , and the lower bearing 34 drives the protrusion 323 of the short arm of the lever to make the lever 32 L 3 is rotated about the axis of rotation of the lever, said lever 32 caused by the rotation of the light shielding surface 325 and / or the light-shielding projection 327 to the change in the distance of the photosensitive member 111 and / or the light emitting element 112, the light shielding surface 325 and / or the light-shielding projection 327 can The photosensitive element 111 is blocked from obtaining light energy from the light-emitting element 112.
  • the rotation of the lever 32 causes the electrical parameters (such as resistance value) of the photosensitive element 111 to change, and the MCU on the circuit board 11 detects the electrical parameters (such as resistance value) of the photosensitive element 111 changes, enabling the detection of the load pressure F exerted on the cleaning element 21 of a circuit board 11 on the MCU.
  • the handle 1 is used to alarm the excessive pressure by means such as sound, light, vibration, and shutdown.
  • the present invention is dedicated to sonic electric cleaning and nursing appliances.
  • Pressure alarm device using the internal clearance of the bearing on the drive shaft, the drive shaft can be inclined relative to the bearing on the drive shaft, the left and right transducer transmission arms are inclined relative to the longitudinal axis of the bearing on the drive shaft, The elastic part of the energy device is inclined with respect to the longitudinal axis of the bearing on the drive shaft, and the fixed part of the bearing on the drive shaft and the elastic part of the transducer is stationary relative to the left and right brackets of the transducer, so the left and right transducer elastic parts The fixed part relative to the elastic part of the transducer is deformed, that is, the load pressure F 1 exerted on the cleaning element will cause the elastic part of the left and right transducers to undergo load deformation, while the left and right transducers are elastic.
  • the deformation of the part driven by the permanent magnets of the left and right transducers is called the deformation driven by the elastic part.
  • the load deformation of the elastic member can be effectively controlled, thereby effectively reducing or eliminating the load deformation of the elastic member on the transducer The impact of life.
  • the lower bearing of the drive shaft can be effectively rotated around the lateral rotation axis L 4 of the drive shaft to implement the pressure alarm function.
  • a lever structure is provided, and the lever and the transducer are connected, and the lever and the drive coil assembly are in a non-contact relationship, which effectively utilizes the lower bearing of the drive shaft to rotate around the lateral rotation axis L 4 of the drive shaft.
  • the lever amplifies the displacement structure is adopted, which greatly improves the accuracy of detecting the load pressure F 1 on the cleaning element, thereby increasing the sensitivity of the pressure alarm device.
  • the light source and the photosensitive unit are respectively arranged on a movable part that is movable relative to the handle housing or a stationary part that is not movable relative to the handle housing and are on the same side, and the light reflecting surface is arranged on the same side.

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Abstract

声波类电动清洁护理器具及用于其的压力报警装置。器具的驱动轴（37）上分别固定有上、下轴承（33,34），上轴承（33）通过上轴承固定面（75）被固定在换能器（3）左、右支架（5,7）中，且相对于上轴承固定面（75）不动，下轴承（34）通过下轴承上固定面（73）被固定在换能器（3）左、右支架（5,7）中，下轴承（34）可以相对于下轴承上固定面（73）或下轴承下固定面（76）作相对运动，以使下轴承（34）分离或接触下轴承上固定面（73）；报警装置包括杠杆（32）、发光元件（112）及光敏元件（111），杠杆（32）上设有遮挡面（325）和/或遮光凸起（327），借助遮挡面（325）和/或遮光凸起（327）与光敏元件（111）之间的间隙变化使光敏元件（111）接收到的光能量发生变化，检测光敏元件（111）的相应电气性能参数的变化，从而获取施加在清洁元件（21）上的负载压力，实现压力报警。

Description

声波类电动清洁护理器具、用于该类器具的压力报警装置
说明书
技术领域
本发明涉及一种具有压力报警装置的声波类电动清洁护理器具，本发明还涉及用于该声波类清洁护理器具的压力报警装置。
背景技术
现有的电动清洁用具(如电动牙刷)按头部组件的运动方式分类，通常可分为头部组件上的清洁元件和清洁元件载体作往复直线运动(包括上下摆动或左右摆动)、头部组件上的清洁元件和清洁元件载体作往复旋转运动、以及整个头部组件作往复旋转运动(简称为声波类)三种。
在声波类电动清洁护理器具(以下简称为清洁护理器具)中，常采用谐振驱动系统来驱动清洁元件作旋转运动，以便按期望的高效率进行操作。如本申请人的专利申请PCT/CN2015/071696所述，清洁护理器具包括具有手柄外壳的手柄，手柄外壳内部装有用以向清洁护理器具的各个部分提供电力的电源部分、用以控制清洁护理器具的各种工作模式以及该清洁护理器具的开启或关闭的控制部分、用以启动或关闭所述清洁护理器具运转的触发部分和将输入电能转换为机械能输出的驱动器。所述驱动器包括换能器、驱动线圈、设置在所述驱动线圈中的驱动线圈铁芯。当驱动线圈通以交变电流i时，分布在换能器上的永磁体受到电磁力的反作用力而驱动换能器以交变电流的频率进行往复旋转运动，从而带动装配到换能器的驱动轴上的清洁元件载体和分布于清洁元件载体上的清洁元件作往复旋转运动，以实现清洁动作。在所述结构中，换能器、清洁元件载体和清洁元件具有固有频率f 固，驱动线圈中的电流具有驱动频率f 0，f 固和f 0非常接近，通常使其满足0.85f 0＜f 固＜1.05f 0，驱动线圈和换能器之间的电磁力可使换能器、清洁元件载体和清洁元件处于谐振状态，从而能获得较高的机械效率。而且，所述换能器包括至少两个换能器弹性件(左侧换能器弹性件和右侧换能器弹性件)，利用弹性材料的弯曲应变构成具有固有振动频率f 固的换能器，当换能器的固有频 率f 固非常接近驱动频率f 0时，手柄外壳中的驱动线圈产生并作用在换能器上的电磁力使换能器处于谐振状态，当换能器的固有频率f 固等于驱动频率f 0时，手柄外壳中的驱动线圈产生并作用在换能器上的电磁力使换能器处于共振状态。
在本申请人的授权公告号为CN106618776B、名称为“电动清洁护理器具、用于该器具的压力报警方法及装置”的发明专利中，所披露的压力报警装置包括检测、采集和报警电路及报警部件，所述电路包括电源、可编程的微芯片处理器IC和由晶体管构成的用以联结电源和驱动线圈的H桥电路，所述微芯片处理器IC的程序中储存有f 0max-n，以选定的n值所对应的f 0max-n作为驱动线圈中流过的电流的固定频率f 0，其中，-0.3(f 0max-f 0min)≤n≤0.85(f 0max-f 0min)，f 0max为电流检测电阻上的平均电压的最大值所对应的驱动线圈电流频率，f 0min为电流检测电阻上的平均电压的最小值所对应的驱动线圈电流频率，并预存有报警负载下的电源电压的平均值U L源和电流检测电阻R 25上的平均电压U LR25，该可编程的微芯片处理器IC输出固定频率为f 0的方波以驱动H桥电路，若(U N源/U L源)×U NR25＞U LR25，无报警信号输出或终止当前的压力报警信号输出；若(U N源/U L源)×U NR25≤U LR25，则输出压力报警信号并报警。该专利通过合理调节清洁元件的纵向轴线和换能器弹性件平面的法向的夹角，使得换能器固有频率f 固随负载作用于清洁元件上的力增加而变大且可以控制换能器固有频率f 固随负载作用于清洁元件上的力增加而变化的速率，而一旦设定了此固定的驱动频率，则在清洁护理器具工作期间该驱动频率不变，使得清洁元件的振幅从小到大，同时使驱动线圈电流值从高到低呈单调下降趋势，从而既可以在合理负载下，保证所述个人电动清洁护理器具获得更高的机械效率、更小的工作电流、更小的能耗、最大的清洁元件振幅、最好的清洁效果，又可以在负载超过合理值后，降低振幅以保护牙龈，而且结构简单、成本低廉。
在本申请人的名称为“用于电动清洁护理器具的光敏压力报警装置”的另一中国发明专利申请(申请公布号为201711125025.4)中,该光敏压力报警装置包括由至少一个光源和至少一个光敏单元构成的光传感部分、面对所述光源和光敏单元的光线反射面、检测电路及报警部分。所述光源和光敏单 元设置在相对于手柄外壳可移动的可动部件或相对于手柄外壳不动的静止部件上且处于同侧，所述光线反射面设置在面对光源和光敏单元那侧的静止部件或可动部件上，大致正对光源和光敏单元。在施加于清洁元件上、方向为近似沿着或平行于清洁元件沿长度方向的轴线的外力F 1和内置于手柄中的弹性件产生的抵抗外力F 1的弹性件弹性力F 2的共同作用下，使设置在相对于手柄外壳可移动的可动部件上的光源和光敏单元或者光线反射面随所述可动部件移动，通过光源发出的光线在光线反射面上的入射角和反射角发生变化，使得能接收到来自光源的光线的光敏单元的受光面积发生变化，进而导致光敏单元的电气性能发生变化。
在申请公布号为CN 104883997 A的发明专利申请中，披露了一种具有压力传感器的电动牙刷，其包括：用于通过直接力测量确定牙刷的刷毛施加在用户的牙齿上的压力的系统；用于通过动态力测量确定牙刷的刷毛施加在用户的牙齿上的压力的系统；和响应于通过直接力测量和动态力测量所确定的压力来调整指示过度刷毛力的压力的预先建立量的处理系统。该装置中，直接力或位移信息是由霍尔效应传感器装置提供的，而动态负载信息也是由霍尔效应传感器提供的，其被用于测量磁场响应相对于驱动信号的相位之间的相移。
发明内容
本发明的任务是提供一种具有压力报警装置的声波类电动清洁护理器具，其在不增加清洁护理器具的体积和成本的前提下，能大大提高对清洁元件上的负载压力的检测精度，从而提高压力报警装置的灵敏度。
根据本发明，所提供的声波类电动清洁护理器具包括具有手柄外壳的手柄及手柄后壳，手柄外壳内装有电源、线路板、换能器、驱动线圈组件、包括清洁元件载体和清洁元件的清洁组件，换能器包括：插入所述清洁组件的驱动轴、换能器左、右支架、至少两个分别布置在驱动轴纵轴线L 1左右两侧的换能器永磁体、相应的永磁体支架、与所述永磁体支架固联并与驱动轴固联的左、右侧换能器传动臂、至少两个分别设置在驱动轴纵轴线L 1左右两侧的换能器弹性件、以及至少一个紧固于所述换能器左、右支架的换能器弹性 件的固定件，所述换能器弹性件的一端分别与换能器弹性件的固定件固联，换能器弹性件的另一端分别与相应的换能器传动臂固联，左、右侧永磁体相互独立，一侧永磁体在朝向驱动线圈方向的磁极极性与另一侧永磁体在朝向驱动线圈方向的磁极极性相反，左、右侧永磁体可相对于换能器弹性件的固定件移动；驱动轴上分别固定有驱动轴上轴承和驱动轴下轴承，驱动轴上轴承通过位于换能器左、右支架上的驱动轴上轴承的固定面被固定在换能器支架中，且不能相对于驱动轴上轴承固定面运动，驱动轴下轴承和驱动轴下轴承上固定面以及驱动轴下轴承下固定面彼此关联，驱动轴下轴承通过位于换能器左、右支架上的驱动轴下轴承上固定面被固定在换能器支架中，因而驱动轴下轴承可以相对于驱动轴下轴承上固定面或驱动轴下轴承下固定面进行相对运动，以实现驱动轴下轴承与换能器左、右支架上的驱动轴下轴承的上固定面之间的分离或接触；该清洁护理器具还包括光敏压力报警装置，所述报警装置包括安装于换能器左、右支架上的杠杆、设于线路板上且邻近杠杆的发光元件以及设于线路板上且邻近杠杆的光敏元件，所述杠杆在朝向线路板方向上布置有杠杆遮挡面和/或遮光凸起，通过杠杆遮挡面和/或遮光凸起与光敏元件之间的间隙变化导致由发光元件发出的、经过所述间隙到达光敏元件的光能量发生变化，检测光敏元件的相应电气性能参数的变化，从而获取施加在清洁元件上的负载压力F 1。
在本发明中，驱动轴下轴承上固定面和驱动轴下轴承下固定面可以约束驱动轴下轴承只能绕驱动轴横向旋转轴线L 4进行受限转动，即驱动轴下轴承不能同时接触驱动轴下轴承上固定面和驱动轴下轴承下固定面。在驱动轴下轴承接触驱动轴下轴承下固定面时，驱动轴下轴承和驱动轴绕驱动轴横向旋转轴线L 4的逆时针转动达最大角度，该最大角度即为驱动轴转动的受限角度。所述驱动轴转动受限角度可以为0-≤2度，优选该转动受限角度为0-≤1.5度，更为优选的是该转动受限角度为1度。
在一实施例中，所述杠杆的左、右两侧分别设有杠杆左、右转动轴，杠杆沿远离杠杆旋转轴线L 3而靠近清洁组件的方向、且在朝向驱动轴下轴承的方位上设有杠杆短臂的凸起，驱动轴下轴承支撑该杠杆短臂凸起，沿远离杠杆旋转轴线L 3而靠近所述手柄后壳的方向、且在朝向驱动轴下轴承的方位上 设有杠杆长臂的凸起，弹簧围绕在所述杠杆长臂凸起外部，该杠杆长臂凸起底平面支撑弹簧的一端，设置在换能器左右支架上的弹簧承载孔底平面支撑所述弹簧的另一端。
优选所述杠杆左、右转动轴具有同一杠杆旋转轴线L 3。
本发明的另一任务是提供一种用于声波类电动清洁护理器具的压力报警装置，该电动清洁护理器具包括具有手柄外壳的手柄及手柄后壳，手柄外壳内装有电源、线路板、换能器、驱动线圈组件、包括清洁元件载体和清洁元件的清洁组件，所述换能器包括：插入所述清洁组件的驱动轴、换能器左、右支架，所述驱动轴上分别固定有驱动轴上轴承和驱动轴下轴承，所述压力报警装置包括安装于换能器左、右支架上的杠杆、设于线路板上且邻近杠杆的发光元件、以及设于线路板上且邻近杠杆的光敏元件，所述杠杆在朝向线路板方向上布置有杠杆遮挡面和/或遮光凸起，杠杆的左、右两侧分别设有杠杆左、右转动轴，杠杆沿远离杠杆旋转轴线L 3而靠近清洁组件的方向、且在朝向驱动轴下轴承的方位上设有杠杆短臂的凸起，驱动轴下轴承支撑该杠杆短臂凸起，沿远离杠杆旋转轴线L 3而靠近手柄后壳的方向、且在朝向驱动轴下轴承的方位上设有杠杆长臂的凸起，围绕所述杠杆长臂凸起外部设有弹簧，该杠杆长臂凸起底平面支撑所述弹簧的一端，设置在换能器左右支架上的弹簧承载孔底平面支撑该弹簧的另一端，通过杠杆遮挡面和/或遮光凸起与光敏元件之间的间隙变化导致由发光元件发出的、经过所述间隙到达光敏元件的光能量发生变化，检测光敏元件的相应电气性能参数的变化，从而获取施加在清洁元件上的负载压力F 1，以实现压力报警。
优选所述杠杆的杠杆长臂长度为X2，杠杆短臂的长度为X1，X2和X1的比值范围为1.5-5；更为优选的是X2和X1的比值范围为2-4。
采用本发明所提供的具有压力报警装置的声波类电动清洁护理器具以及用于该声波类清洁护理器具的压力报警装置，在不增加清洁护理器具的体积和成本的前提下，可以大大提高检测施加于清洁元件上的负载压力的精度，从而提高压力报警装置的灵敏度。此外，在本发明中，通过设置驱动轴下轴承上固定面和驱动轴下轴承下固定面来确定驱动轴转动受限角度，使弹 性件负载形变得到有效控制，从而有效减少或消除弹性件负载形变对换能器寿命的影响。
附图说明
本发明以声波类电动牙刷(以下简称为电动牙刷)为例对所述清洁护理用具进行解释说明。
图1为本发明的电动牙刷示意图；
图2为图1所示电动牙刷的装配示意图，其示出了手柄部分、头部组件的装配关系；
图3为图2中电动牙刷的换能器示意图；
图4为图1所示清洁元件上空载状态下，电动牙刷的换能器、驱动线圈和线路板及杠杆组合示意图；
图5为图1所示清洁元件上负载状态下，电动牙刷换能器、驱动线圈和线路板及杠杆组合示意图；
图6为图4的局部放大示意图；
图7为图5的局部放大示意图；
图8为换能器右支架和杠杆及驱动轴下轴承组合示意图；
图9为换能器右支架和驱动轴下轴承组合示意图；
图10为换能器右支架示意图；
图11为杠杆示意图；
图12为图1所示清洁元件处于负载状态下，杠杆和线路板组合示意图；
图13为图1所示清洁元件处于空载状态下，杠杆和线路板组合示意图；
图14为驱动轴分别处于空载状态和负载状态时和驱动轴下轴承的组合示意图；
图15为本发明另一实施例中，清洁元件处于空载状态下，杠杆和线路板组合示意图；
图16为图15所示实施例中，清洁元件处于负载状态下，杠杆和线路板组合示意图。
主要附图标记说明
1为手柄
2为清洁组件
3为换能器
4为驱动线圈组件
5为换能器左支架
6为驱动线圈左支架
7为换能器右支架
8为驱动线圈右支架
9为手柄后壳
10为电池
11为线路板
12为固定螺丝
13为手柄外壳
21为清洁元件
31为弹簧
32为杠杆
33为驱动轴上轴承
34为驱动轴下轴承
35为换能器右永磁体
36为换能器左永磁体
37为驱动轴
38为换能器弹性件
39为换能器弹性件的固定件
41为驱动线圈铁芯
42为驱动线圈
71为杠杆固定孔
72为弹簧承载孔
73为驱动轴下轴承上固定面
74为凸起通孔
75为驱动轴上轴承固定面
76为驱动轴下轴承下固定面
77为弹簧承载孔的底平面
111为光敏元件
112为发光元件
321为杠杆左转动轴
322为杠杆右转动轴
323为杠杆短臂的凸起
324为杠杆长臂的凸起
325为杠杆遮挡面
326为杠杆长臂的凸起底平面
327为遮光凸起
X 1为杠杆短臂的长度
X 2为杠杆长臂的长度
L 1为驱动轴纵轴线
L′ 1为驱动轴相对于驱动轴上轴承的纵轴线倾斜时，驱动轴的驱动轴纵轴线
L 2为通过驱动轴上轴承中心点垂直于驱动轴纵轴线L 1且大致平行于清洁元件的纵向轴线L 5的驱动轴上轴承的横向轴线
L 3为杠杆旋转轴线
L 4为垂直于驱动轴上轴承的横向轴线L 2和驱动轴纵轴线的驱动轴横向旋转轴线
L 5为清洁元件的纵向轴线
F为作用于驱动轴上的外力
F 1为施加在清洁元件上的负载压力
F 2为传递到杠杆短臂的凸起上的负载力
F 3为杠杆长臂上的凸起上的弹簧力
M 1为旋转力矩
M 2为杠杆短臂的力矩
M 3为杠杆长臂的力矩
具体实施方式
如前所述，下文以声波类电动牙刷作为本发明的声波类电动清洁护理器具的典型例子，并结合附图更详细地描述本发明的示例性实施例。虽然下面以电动牙刷为例进行解释说明，但本发明不限于此。本发明也可适用于声波类电动剃须刀、声波类电动洁面器、声波类电动沐浴器等用于个人的声波类电动清洁护理器具。
本说明书中使用的术语仅仅是为了对具体的示例性实施例进行描述而不是限制。
本申请中使用的词汇“和/或”包括所列出的一或多个相关联的词汇中的任一个和所有组合。
除非上下文另有明确指示，此处使用的单数形式“一”、“一个”和“该”可以包括复数形式。词语“包含”、“包括”和“具有”是宽范围的，明确说明规定的特征、集合、步骤、操作、元件和/或部件的存在，但不排除一个或多个其它特征、集合、步骤、操作、元件、部件和/或它们的组的存在或附加。
在全部附图中，类似的附图标记表示相似的部件。
为了清楚起见，在本说明书中采用了表述空间相对位置的词语，如“上”、“下”、“左”、“右”、“横向”等来简单描述如图所示的一个元件或特征与另一元件(一或多个)或特征(一或多个)的相互关系，其中，“上”、“下”是相对于清洁元件纵向轴线而言的，接近清洁元件的一端定义为“上”，与“上”相对的一端(即，远离清洁元件的一端)定义为“下”；“左”和“右”是相对于驱动轴纵向轴线而言的，面向相应视图沿垂直于驱动轴纵向轴线的方向在驱动轴纵向轴线的左侧定义为“左”，其右侧定义为“右”；“横向”是指垂直于驱动轴纵向轴线的方向。
图1-14示出了作为本发明的电动清洁护理器具的一个示例的声波类电动牙刷。参见图1-5，本发明的声波类电动牙刷包括具有手柄外壳13的手柄，手柄外壳13内部装有用以向牙刷的各个部分提供电力的电池10、用以控制 牙刷的开启或关闭以及各种工作模式的线路板11、用以将输入的电能转换为机械能输出的换能器3、驱动线圈组件4、包括清洁元件载体和分布在清洁元件载体上的清洁元件(即刷毛)21的清洁组件2。清洁组件2与驱动轴37(图4,5)可拆卸地联接在一起。换能器3包括：插入清洁组件的驱动轴37；至少一个紧固于换能器左、右支架5、7(图2)的换能器弹性件的固定件39(图3)；至少两个相对于驱动轴纵轴线L 1分别布置在左右两侧的换能器左右永磁体36、35(图3)；用于固联所述换能器左右永磁体36、35的相应的永磁体支架；与永磁体支架固联并与驱动轴37固联的左、右侧换能器传动臂；以及至少两个分别设置在驱动轴纵轴线L 1左右两侧的左、右侧换能器弹性件38(图3)。左、右侧换能器弹性件38的一端分别与换能器弹性件的固定件39固联，左、右侧换能器弹性件38的另一端分别与相应的换能器传动臂固联。左、右侧永磁体36、35相互独立，一侧永磁体在朝向驱动线圈方向的磁极极性为S极或N极，另一侧永磁体在朝向驱动线圈方向的磁极极性与所述一侧永磁体的磁极极性相反，左、右侧永磁体36、35可相对于换能器弹性件的固定件39移动。当驱动线圈42(图4)通过频率为f 0的交变电流时，左、右换能器永磁体36、35绕驱动轴纵轴线L 1往复旋转,左、右换能器永磁体36、35带动驱动轴37绕驱动轴纵轴线L 1往复旋转，驱动轴37带动清洁组件2上的清洁元件21绕驱动轴纵轴线L 1往复旋转。
如图6-10、图14所示，驱动轴37上分别固定有驱动轴上轴承33和驱动轴下轴承34，驱动轴上轴承33通过位于换能器左、右支架5、7上的驱动轴上轴承固定面75被固定在换能器支架5、7中，且不能相对于该驱动轴上轴承固定面75运动，驱动轴下轴承34和驱动轴下轴承上固定面73以及驱动轴下轴承下固定面76彼此关联，驱动轴下轴承34通过位于换能器左、右支架5、7上的驱动轴下轴承上固定面73被固定在换能器支架5、7中，因而驱动轴下轴承34可以相对于驱动轴下轴承上固定面73或驱动轴下轴承下固定面76进行相对运动，以实现驱动轴下轴承34与换能器左、右支架5、7上的驱动轴下轴承上固定面73之间的分离或接触。
位于换能器左、右支架5、7的驱动轴下轴承上固定面73形成有空穴，该空穴的体积大于驱动轴下轴承的体积，因而驱动轴下轴承可被容纳在该空 穴中。借助这种联接结构，驱动轴下轴承34可以相对于驱动轴下轴承上固定面73或驱动轴下轴承下固定面76进行有限的运动。由于轴承存在内部间隙(游隙)，驱动轴37可以相对于驱动轴上轴承33的纵轴线倾斜，如图14所示。在无外力F作用、驱动轴37相对于驱动轴上轴承33的纵轴线没有倾斜时，驱动轴37的纵轴线L 1和驱动轴上轴承33的纵轴线重合；当驱动轴37在外力F的作用下相对于驱动轴上轴承33的纵轴线倾斜时，驱动轴37的驱动轴纵轴线L' 1相对于驱动轴上轴承33的纵轴线倾斜，两轴线的夹角为α(图14)，α为轴承的倾斜角，通常α角小于2度。
当对清洁元件21施加负载压力时，驱动轴37上被施加了压力F 1并随之产生旋转力矩M 1(图7)，由于驱动轴上轴承33被固定在换能器左右支架5、7中，而且驱动轴37相对于驱动轴上轴承33的纵轴线可以倾斜，驱动轴37上的旋转力矩M 1以O 1点(图7)为中心点，O 1点为位于驱动轴纵轴线L 1上的驱动轴上轴承33的中心点。驱动轴37在旋转力矩M 1的作用下以O 1点为基点绕驱动轴横向旋转轴线L 4(图中未示出)逆时针转动，如图7所示，紧固在驱动轴37上的驱动轴下轴承34在施加在清洁元件21上的负载压力F 1形成的旋转力矩M 1的作用下也以O 1点为基点绕驱动轴横向旋转轴线L 4逆时针转动。本发明中，在换能器左右支架5、7上布置有驱动轴下轴承上固定面73，驱动轴下轴承34在旋转力矩M 1的作用下能以O 1点为基点绕驱动轴横向旋转轴线L 4逆时针转动到驱动轴转动的受限角度。申请人经大量试验得出，该受限角度优选为1.5度，更优选为1度。在本实施例中，所述驱动轴转动的受限角度选择为1度，在其他实施例中，该该受限角度也可以为0度至2度之间的任何其他角度。
本发明中，在驱动轴下轴承34上设有用来实现限制所述驱动轴转动角度的上固定面73，当驱动轴下轴承34在旋转力矩M 1的作用下以O 1点为基点绕驱动轴横向旋转轴线L 4逆时针转动到所述驱动轴转动的受限角度时，驱动轴下轴承上固定面73接触驱动轴下轴承34的外表面，且限制驱动轴下轴承34进一步转动。
如图2、图6、图11所示，在换能器左、右支架5、7上安装有杠杆32，在杠杆32上左右两侧分别设置有杠杆左转动轴321、杠杆右转动轴322，杠杆左、右转动轴321、322具有同一杠杆旋转轴线L 3。在远离杠杆旋转轴线 L 3而靠近清洁组件2的方向、且在朝向驱动轴下轴承34的方位上，杠杆32上设有杠杆短臂的凸起323。在远离杠杆旋转轴线L 3而靠近手柄后壳9的方向、且在朝向驱动轴下轴承34的方位上，杠杆32上设有杠杆长臂的凸起324。杠杆短臂的凸起323的受力点到杠杆旋转轴线L 3的力臂长度为杠杆短臂的长度X 1，杠杆长臂的凸起324的受力点到杠杆旋转轴线L 3的力臂长度为杠杆长臂的长度X 2。在换能器右支架7(图2)上设有凸起通孔74(图9)，在换能器左支架5(图2)上同样布置有凸起通孔，杠杆短臂的凸起323穿过上述二个凸起通孔和驱动轴下轴承34接触，驱动轴下轴承34支撑杠杆短臂的凸起323。弹簧31(图4)围绕在杠杆长臂的凸起324的外侧，弹簧31可以为圆柱型弹簧，杠杆长臂的凸起底平面326支撑弹簧31的一端，布置在换能器左右支架5、7上的弹簧承载孔的底平面77(图9)支撑弹簧31的另一端。如图4和图6所示，在清洁元件21处于空载状态时，弹簧31呈预压缩状态，弹簧31的预紧力推动杠杆32绕杠杆旋转轴线L 3转动，使杠杆短臂的凸起323紧压驱动轴上轴承33。
如图8、图9、图11所示，杠杆右转动轴322与设置在换能器右支架7上的杠杆固定孔71配合，杠杆左转动轴321与设置在换能器左支架5上的杠杆固定孔71配合，上述两个杠杆固定孔71约束杠杆32只能绕杠杆旋转轴线L 3旋转。
如图11、图13所示，杠杆32在朝向线路板11方向上布置有杠杆遮挡面325，在清洁元件21处于空载状态时，安装在线路板11上且邻近杠杆11的发光元件112发出的光线可以经过杠杆遮挡面325和安装在线路板11上且邻近杠杆11的光敏元件111之间的间隙到达光敏元件111。如图12所示，在清洁元件21承受到足够大的负载时，杠杆32在杠杆短臂的凸起上的负载力F 2和杠杆长臂上的弹簧力F 3的共同作用下绕杠杆旋转轴线L 3顺时针转动，杠杆遮挡面325和光敏元件111之间的间隙逐渐减小，从而发光元件112发出的、经过杠杆遮挡面325和光敏元件111之间的间隙到达光敏元件111的光能量减少。
当驱动轴下轴承34在方向与旋转力矩M 1的方向相反的力矩作用下，或在形成于杠杆长臂的凸起324上的弹簧力F 3的作用下，以O 1点为基点绕驱动轴横向旋转轴线L 4顺时针转动到驱动轴下轴承下固定面76接触驱动轴下轴 承34时，限制驱动轴下轴承34进一步转动，此时驱动轴37的纵轴线L 1和驱动轴上轴承33的纵轴线重合，此状态为驱动轴37的初始状态。当清洁元件21处于空载状态时，驱动轴37为所述初始状态。
在本实施例中，利用左、右侧换能器弹性件38的弯曲形变来响应左、右换能器永磁体36、35的运动，使换能器3和清洁组件2组成的弹性系统在来自驱动线圈42的交变电磁力作用下产生谐振，以实现清洁元件21的高效往复旋转。显然，由于驱动轴上轴承33有内部间隙，驱动轴37可以相对于驱动轴上轴承33倾斜，则左、右侧换能器传动臂相对于驱动轴上轴承33的纵轴线倾斜，左、右侧换能器弹性件38相对于驱动轴上轴承33的纵轴线倾斜，而驱动轴上轴承33及换能器弹性件的固定件39相对于换能器左、右支架5、7静止，因而左、右侧换能器弹性件38相对于换能器弹性件的固定件39发生形变，即施加在清洁元件21上的负载压力F 1会造成左、右侧换能器弹性件38发生形变，上述形变被称为弹性件负载形变。左、右侧换能器弹性件38在左、右换能器永磁体36、35驱动下的形变被称为弹性件驱动形变。弹性件驱动形变的作用是将左、右换能器永磁体36、35的机械能传递到清洁元件21，弹性件负载形变对清洁元件21获得机械能没有帮助。过大的弹性件负载形变还将加剧换能器弹性件的疲劳老化，使换能器弹性件38在短时间内疲劳断裂，导致电动清洁护理器具失效。本实施例中，通过设置驱动轴下轴承上固定面73和驱动轴下轴承下固定面76来确定驱动轴转动受限角度，使弹性件负载形变得到有效控制，从而有效减少或消除弹性件负载形变对换能器3寿命的影响。另外，本实施例中有效利用驱动轴下轴承34可绕驱动轴横向旋转轴线L 4受限转动来实施压力报警功能。
当用户启动电动牙刷时，驱动线圈42通过频率为f 0的交变电流，左、右换能器永磁体36、35绕驱动轴纵轴线L 1往复旋转,左、右换能器永磁体36、35带动驱动轴37绕驱动轴纵轴线L 1往复旋转，驱动轴37带动清洁组件2上的清洁元件21绕驱动轴纵轴线L 1往复旋转。在清洁元件21处于空载状态时，如图6所示，传递到驱动轴37上的负载力为零，驱动轴纵轴线L 1和驱动轴上轴承33的纵轴线重合，驱动轴37处于初始状态，弹簧31呈预压缩状态，弹簧31的预紧力推动杠杆32绕杠杆旋转轴线L 3转动，使杠杆短臂的凸起323压紧到驱动轴上轴承33上，驱动轴上轴承33受到来自弹簧31 的力而紧贴驱动轴下轴承下固定面76，杠杆32上的杠杆遮挡面325到光敏元件111之间的间隙达到最大，光敏元件111接受来自发光元件112的光能量达到最大值，光敏元件111相应的电气参数(如电阻值)达到最小值。当用户在清洁元件21上施加负载压力F 1时，如图7所示，施加在清洁元件21上的负载压力F 1传递到驱动轴37，继而传递到驱动轴上轴承33，驱动轴上轴承33将该力传递到杠杆短臂的凸起323，形成杠杆短臂的凸起上的负载力F 2。如图7和图11所示，杠杆短臂的凸起323上承受的负载力F 2和杠杆短臂的长度X 1的乘积为杠杆短臂的力矩M 2(图中未示出)，杠杆长臂上的弹簧力F 3和杠杆长臂的长度X 2的乘积为杠杆长臂的力矩M 3(图中未示出)。当施加在清洁元件21上的负载压力F 1变大时，当杠杆短臂的力矩M 2大于杠杆长臂的力矩M 3时，杠杆32绕杠杆旋转轴线L 3顺时针转动，杠杆长臂的凸起底平面326推动弹簧31进一步压缩，驱动轴纵轴线L 1相对驱动轴上轴承33的纵轴线倾斜，施加在清洁元件21上的负载压力F 1推动驱动轴下轴承34脱离驱动轴下轴承下固定面76，使驱动轴下轴承34运动趋近驱动轴下轴承上固定面73，如图12和图11所示，杠杆32上的杠杆遮挡面325到光敏元件111之间的间隙变小，光敏元件111接受到来自发光元件112的光能量变小，光敏元件111相应的电气参数(如电阻值)变大。当施加在清洁元件21上的负载压力F 1进一步变大时，驱动轴下轴承34接触驱动轴下轴承上固定面73，驱动轴下轴承上固定面73限制驱动轴下轴承34进一步转动，杠杆短臂的凸起上的负载力F 2达到最大值，杠杆短臂的力矩M 2达到最大值，杠杆32上的杠杆遮挡面325到光敏元件111之间的间隙达到最小值，光敏元件111接受到来自发光元件112的光能量达到最小值，光敏元件111相应的电气参数(如电阻值)达到最大值。
施加在清洁元件21上的负载压力F 1导致换能器弹性件38形成弹性件负载形变，负载压力F 1越大，弹性件负载形变也越大，过大的弹性件负载形变将加剧换能器弹性件38疲劳老化，使换能器弹性件38在短时间内疲劳断裂，进而导致电动清洁护理器具失效。同时，在清洁牙齿的过程中，在清洁元件21上施加过大的负载压力F 1对牙龈也会造成损害。本实施例中，如上所述，在驱动轴37上紧固有驱动轴上轴承33和驱动轴下轴承34，驱动轴上 轴承33被固定在换能器左、右支架5、7中，使驱动轴上轴承33和换能器左支架5、换能器右支架7不能相对运动。驱动轴下轴承34虽也被固定在换能器左、右支架5、7中，但驱动轴下轴承34相对换能器左、右支架5、7能有限地运动。由于驱动轴下轴承34不能同时接触驱动轴下轴承上固定面73和驱动轴下轴承下固定面76，驱动轴下轴承上固定面73和驱动轴下轴承下固定面76可以约束驱动轴下轴承34只能绕驱动轴横向旋转轴线L 4进行有限转动。驱动轴下轴承34接触驱动轴下轴承上固定面73时，形成驱动轴下轴承34和驱动轴37的绕驱动轴横向旋转轴线L 4的逆时针转动的最大角度，该最大角度为所述驱动轴转动受限角度。如上所述，本发明中，所述驱动轴转动受限角度最大值为2度，优选为1.5度，更为优选的是为1度。
驱动轴下轴承34支撑杠杆短臂的凸起323。杠杆长臂的凸起底平面326承受弹簧31的压力。杠杆左转动轴321、杠杆右转动轴322和布置在换能器左右支架5、7上的杠杆固定孔71配合，使杠杆32只能绕杠杆旋转轴线L 3转动。施加在清洁元件21上的负载压力F 1使驱动轴下轴承34绕驱动轴横向旋转轴线L 4逆时针转动，驱动轴下轴承34推动杠杆短臂的凸起323，致使杠杆32绕杠杆旋转轴线L 3顺时针转动，杠杆32上的杠杆遮挡面325到光敏元件111之间的间隙由大变小，光敏元件111相应的电气参数(如电阻值)由小变大。线路板11上的微控制单元MCU通过检测光敏元件111相应的电气参数(如电阻值)的变化，就可以对应地检测到清洁元件21上的负载压力F 1的大小。当施加在清洁元件21上的负载压力F 1达到或超过设定阈值时，借助于手柄1可以通过声音、光、振动等方式提醒用户清洁元件21上的负载压力F 1过大，或直接对电动牙刷进行降低速度或停机等处理，从而有效保护用户的牙龈。在上述实施例中，通过杠杆32的杠杆长臂的长度X 2和杠杆短臂的长度X 1的比值，可以放大施加在清洁元件21上的负载压力F 1与驱动轴下轴承34位移的对应关系，使杠杆32上的杠杆遮挡面325到光敏元件111之间的间隙拥有更大变化，而使光敏元件111对应的电气参数(如电阻)的变化值更大，从而大大提高对清洁元件21上的负载压力F 1检测的精度。本实施例中，杠杆长臂长度X 2和杠杆短臂长度X 1的比值范围为1.5-5，优选为2-4。
显然，光敏元件111和发光元件112以及杠杆32之间的几何关系不限于上述实施例。在另一个实施例中，如图15、图16所示，在杠杆32上设置有遮光凸起327，遮光凸起327从杠杆32向线路板11延伸，遮光凸起327介于光敏元件111和发光元件112之间，遮光凸起327可以阻挡光敏元件111获得来自发光元件112的光线，具体分析同上一个实施例，在此不再赘述。显然，在上述两个实施例中，线路板11的光敏元件111和发光元件112的位置可以互换，同样能实现本发明目的，而且能达到相同的技术效果。
本发明中，在杠杆32上设置遮光面325和/或遮光凸起327，线路板上设置有发光元件112和光敏元件111。在施加在清洁元件21上的负载压力F 1作用下，驱动轴37上的驱动轴下轴承34绕杠杆旋转轴线L 3转动，驱动轴下轴承34驱动杠杆短臂的凸起323，使杠杆32绕杠杆旋转轴线L 3转动，上述杠杆32的转动引起遮光面325和/或遮光凸起327到光敏元件111和/或发光元件112的距离的变化，遮光面325和/或遮光凸起327能阻挡光敏元件111获得来自发光元件112的光能量，上述杠杆32的转动引起光敏元件111的电气参数(如电阻值)的变化，线路板11上MCU检测光敏元件111的电气参数(如电阻值)的变化，从而实现线路板11上MCU对施加在清洁元件21上的负载压力F 1的检测。当施加在清洁元件21上的负载压力F 1等于或超过设定的阈值时，借助手柄1通过如声音、光、振动、停机等方式对压力过大作出报警。
值得强调的是，虽然，本发明和本申请人的所述另一中国发明专利申请(申请公布号为201711125025.4)都采用了光敏压力报警原理，但本发明是专用于声波类电动清洁护理器具的压力报警装置。在本发明中，利用驱动轴上轴承存在内部间隙，驱动轴可以相对于驱动轴上轴承倾斜，左、右侧换能器传动臂相对于驱动轴上轴承的纵轴线倾斜，左、右侧换能器弹性件相对于驱动轴上轴承的纵轴线倾斜，而驱动轴上轴承及换能器弹性件的固定件相对于换能器左、右支架静止，因而左、右侧换能器弹性件相对于换能器弹性件的固定件发生形变，即施加在清洁元件上的负载压力F 1会造成左、右侧换能器弹性件发生弹性件负载形变，而左、右侧换能器弹性件在左、右换能器永磁体驱动下的形变被称为弹性件驱动形变。通过设置驱动轴下轴承的上固定 面和驱动轴下轴承的下固定面来确定驱动轴转动受限角度，使弹性件负载形变得到有效控制，从而有效减少或消除弹性件负载形变对换能器寿命的影响。同时有效利用驱动轴下轴承可绕驱动轴横向旋转轴线L 4受限转动来实施压力报警功能。此外，本发明中，设有杠杆结构，且杠杆和换能器联接，杠杆和驱动线圈组件为非接触关系，既有效地利用了驱动轴下轴承可绕驱动轴横向旋转轴线L 4受限转动来实施压力报警功能，又采用了杠杆放大位移结构，大大提高对清洁元件上的负载压力F 1检测的精度，进而提高了压力报警装置的灵敏度。
而在公布号为201711125025.4的发明专利申请中，光源和光敏单元分别设置在相对于手柄外壳可移动的可动部件或相对于手柄外壳不动的静止部件上且处于同侧，光线反射面设置在面对光源和光敏单元那侧的静止部件或可动部件上，大致正对光源和光敏单元，在施加于清洁元件上、方向为近似沿着或平行于清洁元件沿长度方向的轴线的外力F 1和内置于手柄中的弹性件产生的抵抗外力F 1的弹性件弹性力F 2的共同作用下，使设置在相对于手外壳可移动的可动部件上的光源和光敏单元或者光线反射面随所述可动部件移动，通过光源发出的光线在光线反射面上的入射角和反射角发生变化，使得能接收到来自光源的光线的光敏单元的受光面积发生变化，进而导致光敏单元的电气性能发生变化。将二份专利申请进行比较可知，二者的结构不同，技术解决方案也不同。虽然在201711125025.4申请的图13-图15示出了将该申请所公开的技术方案用于声波类电动清洁护理用具的情况，但是该申请的技术方案更适合于驱动组件包括微型电机的、清洁元件和清洁元件载体作往复直线运动或作往复旋转运动的电动清洁护理器具类型，因为直流微型电机可以响应清洁元件上的负载力而产生大的位移，且直流微型电机的整体移动不影响电机的动力输出。而对于声波类电动清洁护理器具而言，清洁元件在负载力的作用下，换能器不能产生较大的位移，否则换能器的寿命会大大缩短。

Claims (11)

  1. 一种声波类电动清洁护理器具，其包括具有手柄外壳(13)的手柄及手柄后壳(9)，手柄外壳(13)内装有电源(10)、线路板(11)、换能器(3)、驱动线圈组件(4)、包括清洁元件载体和清洁元件(21)的清洁组件(2)，所述换能器(3)包括：插入所述清洁组件(2)的驱动轴(37)、换能器左、右支架(5、7)、至少两个分别布置在驱动轴纵轴线(L 1)左右两侧的换能器永磁体(36、35)、相应的永磁体支架、与所述永磁体支架固联并与驱动轴(37)固联的左、右侧换能器传动臂、至少两个分别设置在驱动轴纵轴线(L 1)左右两侧的换能器弹性件(38)、以及至少一个紧固于所述换能器左、右支架(5、7)的换能器弹性件的固定件(39)，所述换能器弹性件(38)的一端分别与所述换能器弹性件的固定件(39)固联，所述换能器弹性件(38)的另一端分别与相应的换能器传动臂固联，所述左、右侧永磁体(36、35)相互独立，一侧永磁体在朝向驱动线圈方向的磁极极性与另一侧永磁体在朝向驱动线圈方向的磁极极性相反，所述左、右侧永磁体(36、35)可相对于换能器弹性件的固定件(39)移动，
    其特征在于，所述驱动轴(37)上分别固定有驱动轴上轴承(33)和驱动轴下轴承(34)，所述驱动轴上轴承(33)通过位于所述换能器左、右支架(5、7)上的驱动轴上轴承固定面(75)被固定在所述换能器支架(5、7)中，且不能相对于该驱动轴上轴承固定面(75)运动，所述驱动轴下轴承(34)和驱动轴下轴承上固定面(73)以及驱动轴下轴承下固定面(76)彼此关联，该驱动轴下轴承(34)通过位于所述换能器左、右支架(5、7)上的驱动轴下轴承上固定面(73)被固定在所述换能器支架(5、7)中，因而该驱动轴下轴承(34)可以相对于所述驱动轴下轴承上固定面(73)或驱动轴下轴承下固定面(76)作相对运动，以实现所述驱动轴下轴承(34)与所述换能器左、右支架(5、7)上的驱动轴下轴承上固定面(73)之间的分离或接触；
    所述清洁护理器具还包括光敏压力报警装置，该报警装置包括安装于所述换能器左、右支架(5、7)上的杠杆(32)、设于所述线路板(11)上且邻近所述杠杆(32)的发光元件(112)以及设于所述线路板(11)上且邻近所述杠杆(32)的光敏元件(111)，所述杠杆(32)在朝向线路板(11) 方向上布置有杠杆遮挡面(325)和/或遮光凸起(327)，通过该杠杆遮挡面(325)和/或遮光凸起(327)与所述光敏元件(111)之间的间隙变化导致由发光元件(112)发出的、经过所述间隙到达所述光敏元件(111)的光能量发生变化，检测该光敏元件(111)的相应电气性能参数的变化，从而获取施加在所述清洁元件(21)上的负载压力(F 1)。
  2. 如权利要求1所述的声波类电动清洁护理器具，其特征在于，所述驱动轴下轴承上固定面(73)和驱动轴下轴承下固定面(76)约束所述驱动轴下轴承(34)只能绕驱动轴横向旋转轴线(L 4)进行受限转动，即所述驱动轴下轴承(34)不能同时接触所述驱动轴下轴承上固定面(73)和所述驱动轴下轴承下固定面(76)。
  3. 如权利要求2所述的声波类电动清洁护理器具，其特征在于，所述驱动轴下轴承(34)接触所述驱动轴下轴承上固定面(73)时，该驱动轴下轴承(34)和所述驱动轴(37)绕驱动轴横向旋转轴线(L 4)的逆时针转动达最大角度，该最大角度即为所述驱动轴转动的受限角度。
  4. 如权利要求3所述的声波类电动清洁护理器具，其特征在于，所述驱动轴转动受限角度为0-≤2度。
  5. 如权利要求4所述的声波类电动清洁护理器具，其特征在于，所述驱动轴转动受限角度为0-≤1.5度。
  6. 如权利要求5所述的声波类电动清洁护理器具，其特征在于，所述驱动轴转动受限角度为1度。
  7. 如权利要求1所述的声波类电动清洁护理器具，其特征在于，所述杠杆(32)的左、右两侧分别设有杠杆左、右转动轴(321、322)，该杠杆(32)沿远离杠杆旋转轴线(L 3)而靠近所述清洁组件(2)的方向、且在朝向所述驱动轴下轴承(34)的方位上设有杠杆短臂的凸起(323)，驱动轴下轴承(34)支撑该杠杆短臂的凸起(323)，沿远离所述杠杆旋转轴线(L 3)而靠近所述手柄后壳(9)的方向、且在朝向所述驱动轴下轴承(34)的方位上设有杠杆长臂的凸起(324)，弹簧(31)围绕在所述杠杆长臂凸起(324)外部，该杠杆长臂凸起底平面(326)支撑(弹簧31)的一端，设置在换能器左右支架(5、7)上的弹簧承载孔底平面(77)支撑弹簧(31)的另一端。
  8. 如权利要求7所述的声波类电动清洁护理器具，其特征在于，所述杠杆左、右转动轴(321、322)具有同一杠杆旋转轴线(L 3)。
  9. 一种用于声波类电动清洁护理器具的压力报警装置，该电动清洁护理器具包括具有手柄外壳(13)的手柄及手柄后壳(9)，手柄外壳(13)内装有电源(10)、线路板(11)、换能器(3)、驱动线圈组件(4)、包括清洁元件载体和清洁元件(21)的清洁组件(2)，所述换能器(3)包括：插入所述清洁组件(2)的驱动轴(37)、换能器左、右支架(5、7)，所述驱动轴(37)上分别固定有驱动轴上轴承(33)和驱动轴下轴承(34)，其特征在于，所述压力报警装置包括安装于所述换能器左、右支架(5、7)上的杠杆(32)、设于所述线路板(11)上且邻近所述杠杆(32)的发光元件(112)以及设于所述线路板(11)上且邻近所述杠杆(32)的光敏元件(111)，所述杠杆(32)在朝向所述线路板(11)方向上布置有杠杆遮挡面(325)和/或遮光凸起(327)，该杠杆(32)的左、右两侧分别设有杠杆左、右转动轴(321、322)，该杠杆(32)沿远离杠杆旋转轴线(L 3)而靠近所述清洁组件(2)的方向、且在朝向所述驱动轴下轴承(34)的方位上设有杠杆短臂的凸起(323)，所述驱动轴下轴承(34)支撑该杠杆短臂凸起(323)，沿远离杠杆旋转轴线(L 3)而靠近所述手柄后壳(9)的方向、且在朝向所述驱动轴下轴承(34)的方位上设有杠杆长臂凸起(324)，围绕所述杠杆长臂凸起(324)外部设有弹簧(31)，该杠杆长臂凸起底平面(326)支撑所述弹簧(31)的一端，设置在所述换能器左右支架(5、7)上的弹簧承载孔底平面(77)支撑所述弹簧(31)的另一端，通过所述杠杆遮挡面(325)和/或遮光凸起(327)与所述光敏元件(111)之间的间隙变化导致由发光元件(112)发出的、经过所述间隙到达光敏元件(111)的光能量发生变化，检测光敏元件(111)的相应电气性能参数的变化，从而获取施加在清洁元件(21)上的负载压力(F 1)，以实现压力报警。
  10. 如权利要求9所述的压力报警装置，其特征在于，所述杠杆(32)的杠杆长臂长度为X2，杠杆短臂的长度为X1，X2和X1的比值范围为1.5-5。
  11. 如权利要求10所述的压力报警装置，其特征在于，所述X2和X1的比值范围为2-4。
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CN208611021U (zh) * 2017-11-14 2019-03-19 上海携福电器有限公司 用于电动清洁护理器具的光敏压力报警装置

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US20220258206A1 (en) 2022-08-18
EP3960124B1 (en) 2023-08-16
JP7395621B2 (ja) 2023-12-11
ES2961645T3 (es) 2024-03-13
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CA3139628A1 (en) 2020-12-03
CA3139628C (en) 2023-06-13

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