CN102688108B - Electric toothbrush with replaceable brush head - Google Patents

Abstract

The invention relates to a brush head-replaceable electric toothbrush which comprises a brush handle and a brush head, wherein a pair of meshed driving gear and driven gear are mounted at the head part of the brush handle; a motor for driving the brush head to rotate and a power module electrically connected with the motor are also mounted in the brush handle; an output shaft of the motor is connected with a worm meshed with the driving gear; and a rotation shaft of the driving gear is in movable detachable connection with the lower end part of the brush head, and a rotation shaft of the driven gear is in movable detachable connection with the upper end part of the brush head, so that the upper end part and the lower end part of the brush head rotate in opposite directions respectively. In the brush head-replaceable electric toothbrush provided by the invention, the rotation shafts of two gears are driven to rotate by the motor and the worm so as to drive the brush head to rotate, wherein the rotation is relatively slow, and the gum is not hurt; moreover, the bristles on the brush head are clean and have large cleaning area and high efficiency; and meanwhile, the brush head can be regularly replaced, thus the cost of repurchasing the whole electric toothbrush is saved.

Description

Electric toothbrush with replaceable brush head

technical field

The invention relates to an electric toothbrush with a replaceable brush head.

Background technique

Compared with ordinary toothbrushes, electric toothbrushes can thoroughly remove dental plaque, reduce gingivitis and gum bleeding. Through rapid rotation, the bristles generate high-frequency vibrations, instantly decompose toothpaste into fine foam, and deeply clean between teeth. Vibration can promote blood circulation in the oral cavity and have an unexpected massage effect on the gum tissue. However, electric toothbrushes currently on the market only rotate in the middle of the brush head. The rotating mechanism generally uses a motor to directly drive two meshing bevel gears. Because the rotation speed is too fast, it is easy to damage the gums, and the cleaning area is small. The efficiency is too low.

Contents of the invention

In view of the deficiencies in the prior art, the object of the present invention is to provide an electric toothbrush with a replaceable brush head that does not damage the gums, has a large cleaning area and is highly efficient.

In order to achieve the above object, the technical solution of the present invention is: an electric toothbrush with a replaceable brush head, including a brush handle and a brush head, and a pair of meshing driving gears and driven gears are installed on the head of the brush handle. A motor for driving the rotation of the brush head and a power supply module electrically connected to the motor are installed in the brush handle, the output shaft of the motor is connected with a worm meshed with the driving gear; the rotating shaft of the driving gear is connected to the brush head The lower end is movably and detachably connected, and the rotating shaft of the driven gear is movably and detachably connected to the upper end of the brush head, so that the upper end and the lower end of the brush head rotate in opposite directions respectively.

Further, the brush head is provided with a first through hole matching with one rotating shaft and a second through hole matching with another rotating shaft.

Further, the rotating shafts are all Z-shaped shafts, one end of the rotating shaft is located in the positioning groove on the brush handle, and the other end of the rotating shaft is provided with a convex cap for clamping the brush head for easy replacement of the brush head.

Further, the motor is a DC motor, and the power module is a dry battery, lithium battery or storage battery.

Further, the brush handle is provided with a power control switch for controlling the opening and closing of the motor.

Compared with the prior art, the present invention has the following advantages: the electric toothbrush with a replaceable brush head drives two gear shafts to rotate through the motor and the worm, and then drives the upper end and the lower end of the brush head to rotate in opposite directions respectively, Not only the worm gear reduction transmission greatly reduces the rotation speed of the brush head, which will not hurt the gums, but also the bristles on the brush head have a large cleaning area, clean and high efficiency, and at the same time, the brush head can be replaced regularly, saving the need to repurchase the entire electric toothbrush cost of.

The present invention will be further elaborated below in conjunction with the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Figure 2 is a schematic view of the structure of the brush handle.

Figure 3 is a schematic view of the structure of the brush head.

Fig. 4 is a schematic diagram of the movement of the two rotating shafts.

In the figure: 1-Brush handle, 1-1-Positioning groove, 2-Brush head, 3-Drive gear, 4-Follower gear, 5-Motor, 5-1-Output shaft, 6-Power module, 7-Worm , 8-rotating shaft, 8-1-convex cap, 9-first through hole, 10-second through hole, 11-power control switch.

Detailed ways

Referring to Figures 1 to 4, an electric toothbrush with a replaceable brush head includes a brush handle 1 and a brush head 2, the head of the brush handle 1 is equipped with a pair of meshing driving gear 3 and driven gear 4, the A motor 5 for driving the rotation of the brush head 2 and a power module 6 electrically connected to the motor 5 are installed in the brush handle 1, and the output shaft 5-1 of the motor 5 is connected with a worm 7 meshing with the driving gear 3; The rotating shaft 8 of the driving gear 3 is movable and detachable connected with the lower end of the brush head 2, and the rotating shaft 8 of the driven gear 4 is movable and detachable connected with the upper end of the brush head 2, so that the upper end and the lower end of the brush head 2 Parts are rotated in opposite directions.

In this embodiment, the rotating shafts 8 are all Z-shaped shafts, and the brush head 2 is provided with a first through hole 9 matching with one rotating shaft 8 and a second through hole 10 matching with the other rotating shaft 8 One end of the rotating shaft 8 is located in the positioning groove 1-1 on the brush handle 1, and the other end of the rotating shaft 8 is provided with a convex cap 8-1 for clamping the brush head 2 for easy replacement of the brush head 2. When the brush head 2 is installed, the two rotating shafts 8 respectively pass through the first through hole 9 and the second through hole 10 to block the brush head 2 by the convex cap 8-1, which is convenient for disassembly and assembly.

In this embodiment, the motor 5 is a DC motor, and the power module 6 is a dry battery, a lithium battery or a storage battery, etc., and the user can replace the battery or charge it; The power control switch 11, the power control switch 11 can be arranged at the bottom of the brush handle 1, which can prevent the user from accidentally touching the power control switch 11 during use, but it is not limited thereto.

The working process of the present invention is as follows: motor 5 drives worm screw 7 to rotate, and worm screw 7 drives driving gear 3 to rotate, and driving gear 3 drives driven gear 4 to do reverse rotation, and driving gear 3 and driven gear 4 drive respective rotating shaft 8 to rotate, The rotating shaft 8 of the driving gear 3 drives the lower end of the brush head 2 to rotate counterclockwise, while the rotating shaft 8 of the driven gear 4 drives the upper end of the brush head 2 to rotate clockwise, so that the bristles on the brush head 2 can clean the teeth .

It should be noted that, of course, the lower end of the brush head 2 may rotate clockwise and the upper end of the brush head 2 may rotate counterclockwise. One brush head realizes synchronous clockwise and anticlockwise rotation at the same time, which can clean the teeth better and the cleaning effect is better.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention. the

Claims (3)

1. An electric toothbrush with a replaceable brush head, comprising a brush handle and a brush head, characterized in that: a pair of meshing driving gears and driven gears are installed on the head of the brush handle, and a toothbrush is also installed in the brush handle There is a motor for driving the brush head to rotate and a power supply module electrically connected with the motor, the output shaft of the motor is connected with a worm meshed with the driving gear; the rotating shaft of the driving gear is detachably connected with the lower end of the brush head , the rotating shaft of the driven gear is detachably connected to the upper end of the brush head, so that the upper end and the lower end of the brush head rotate in opposite directions respectively; A through hole and a second through hole matched with another rotating shaft, the rotating shafts are all Z-shaped shafts, one end of the rotating shaft is located in the positioning groove on the brush handle, and the other end of the rotating shaft is provided with a Brush head Convex cap for easy replacement of the brush head. 2. An electric toothbrush with a replaceable brush head according to claim 1, characterized in that: the motor is a DC motor, and the power module is a dry battery, lithium battery or storage battery. 3. An electric toothbrush with a replaceable brush head according to claim 1 or 2, characterized in that: the brush handle is provided with a power control switch for controlling the opening and closing of the motor.