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Multi-directional drive electric toothbrush solution
Electric toothbrush is a new product that has appeared in recent years. Due to its high cleaning efficiency, it can clean the blind areas that cannot be cleaned by manual brushing. At the same time, it has a good cleaning effect and can effectively protect the health of the teeth. The national electric toothbrush is a very popular daily necessities. However, due to the relatively expensive price of electric toothbrushes in our country, and its service life is generally 2-3 months, the life span is short, which leads to great obstacles in the promotion of electric toothbrushes in our market; and the design provided The structure of the electric toothbrush is simple, the manufacturing cost is low, and the function of the replaceable toothbrush head greatly solves the defects of the high price and short service life of the existing electric toothbrush, and provides convenience for the subsequent market promotion of the electric toothbrush.
Working principle of multi-directional drive electric toothbrush
I.1 Radial linear drive mechanism
Schematic diagram of radial linear drive mechanism of electric toothbrush
As shown in FIG. 1, by setting a radial drive mechanism inside it, the direction of the output force of the motor is changed, so that the toothbrush head 1 makes a reciprocating linear motion on the guide rail 2.
1.2 Rotary drive mechanism
The schematic diagram of the rotary drive mechanism of the electric toothbrush is shown in the cabinet 2. By setting the rotary drive mechanism 3 inside it, the toothbrush head 1 is driven by the rotary drive mechanism.
Rotate motion (including clockwise rotation and counterclockwise rotation).
1.3 Control switch
The above two drive modes are respectively controlled by two relatively independent switches, that is, the motion modes of the electric toothbrush include the following three types: radial linear motion, rotary motion, radial motion and rotary motion synchronous motion, etc.
Introduction to the structure of multi-directional drive electric toothbrush
Number l is the toothbrush head;
Number 2 is the sliding guide rail;
No. 4 is the shaker (hollow plastic round rod); No. 5 is the crank (hollow plastic round rod); No. 6 is the drive motor bo
The reason why rocking bar 4 and crank 5 are designed to be hollow, and the plastics round bar is in order to reduce the quality of brush handle slider mechanism power original part and traditional part. Because reducing the mass of the connecting rod can effectively reduce the speed fluctuation of the system, reduce the load of the system, and reduce the power requirement for the motor.
2.1 Working mechanism: when the mechanism is running
The clockwise rotation of the motor M drives the pottery handle 5 to also rotate clockwise;
The clockwise rotation of the crank 5 drives the rocker 4 to swing within a certain angle range;
The banyan bar 4 can vertebrally move the slider (toothbrush head 1) to do reciprocating self-linear motion on the slider guide rail 2 during the swing process. Yang here! The handle slider adopts a partial brush handle slider mechanism, that is, the center of the slider and the center of rotation of the attached handle are not on the same horizontal line. It is the reciprocating linear motion of the slider, and at the same time, it also has the characteristic of sharp negative, so that the toothbrush head moves linearly to the left horizontally, that is, D: the stroke speed is slow and the J) rate is large; when it moves linearly to the right horizontally, it returns The empty stroke speed is fast and the power is small. Extreme angle: that is, during the movement process of the crank 5 and the pendulum 4, there are two situations where the two rods coincide on a straight line (that is, the dead point position), and the central angle of the corresponding two straight lines in these two cases is the extreme position central corner. When the R-plane four-bar mechanism presents an extreme angle in the process of movement, the mechanism has the characteristic of snapping, and the larger the value of K, the more obvious the characteristic of snapping back.
2.2 Two-way rotation drive mechanism
The schematic diagram of the two-way rotation drive mechanism of the electric toothbrush is shown in Figure 4. Number 7 is a hollow slider. Install the motor a in the hollow slider 7. The two are relatively fixed; the installation relationship between the toothbrush head 1 and the motor b is a detachable installation.
Working mechanism: When the mechanism is running: when the working state of the toothbrush is a single two-way rotary motion, the toothbrush head 1 is driven by the motor b to rotate clockwise or counterclockwise;
When the working state of the toothbrush is two-way rotation and radial linear synchronous movement, the motor b is used as a power source to drive the crank slider mechanism composed of the right crank 5, the rocker 4 and the toothbrush head 1, thereby converting the torque of the motor into a slider ( Toothbrush head 1) The thrust of the reciprocating linear motion; the reciprocating linear motion of the slider drives the movement of the toothbrush head 1 connected to it, and at the same time the toothbrush head also rotates clockwise or counterclockwise under the drive of the motor a. Motor a adopts a brushed DC motor, because the brushed DC motor is commutated by the motor, and the commutation of the brush is reversible. The clockwise or counterclockwise rotation of motor a can be controlled by switch control.
Summarize
The designed electric toothbrush is mainly composed of two major mechanisms, the radial linear drive mechanism and the rotary drive mechanism. Through its switch control, the electric toothbrush can realize single two-way rotary motion, single radial linear motion, two-way rotation and radial linear synchronous motion, etc. This kind of working mode, and the replaceable feature of the toothbrush head greatly prolongs the service life of the electric toothbrush, and solves the problem that the existing electric toothbrush in the market is difficult to be further promoted due to the short service life.
Shenzhen Zuchuang Microelectronics Co., Ltd. has 20 years of electronic and electrical program development and design and chip agency company. It is the earliest company in China to develop point reading pen solutions. It can provide scanning dictionary pen program development, Bluetooth Wifi point reading pen OID program development, smart point Reading pen program development, visual endoscopy ear pick program development, wifi point reading pen project development and other services. The development capabilities cover PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development and other hardware and software design.
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