Electric toothbrush

Abstract

An electric toothbrush comprises a brush handle and a brush head, wherein the brush head comprises a left-rotating brush and a right-rotating brush which are arranged on a brush shaft facing each other, the right end of the brush shaft can be rotatably arranged in an axial hole at the upper end of the brush handle and is axially positioned on the axial hole by the right-rotating brush and the shaft cap at the right end of the brush shaft, the power source arranged in the brush handle is connected to the gear on the right side of the right-rotating brush through the transmission shaft in the brush handle, and the right-rotating brush drives the brush shaft to rotate; the bristles of the left-rotating brush and the right-rotating brush both comprise inner circle bristles and outer circle bristles, and the angle between the inner circle bristles and the brush shaft is smaller than the angle between the outer circle bristles and the brush shaft; the left-rotating brush can be slidably mounted on the brush shaft, and a spring is arranged between the left-rotating brush and the brush shaft, and the spring makes the left-rotating brush and the right-rotating brush approach each other. The bristle spacing of the left and right brushes of the present invention can automatically adapt to the thickness of the teeth, ensuring that the ends of the bristles can contact the sides of the teeth, and the cleaning efficiency of the bristles is high; and the comfort level of the human oral cavity is high.

Description

Technical Field

[0001] The invention relates to a toothbrush, in particular to an omnidirectional electric toothbrush. Background Art

[0002] At present, toothbrushes have become people's essential daily necessities. There are many varieties of toothbrushes, especially electric toothbrushes, which bring convenience to people's brushing teeth. However, due to the many defects of existing electric toothbrushes, electric toothbrushes are not widely accepted by people.

[0003] Chinese patent publication CN201210502534 discloses an all-round electric toothbrush, including a left-rotating brush and a right-rotating brush arranged on a brush shaft. The disadvantage is that the distance between the brushes on the left and right sides is fixed, and the thickness of human molars is greater than that of incisors. The brushes with fixed distance cannot adapt to the thickness of teeth, and cannot ensure that the heads of the bristles act on the sides of the teeth. The distance between the brushes on the left and right sides can only be made according to the thickness of the incisors. When brushing molars, the bristles are bent, and the heads of the bristles cannot brush the sides of the teeth, resulting in insufficient brushing effect. Summary of the invention

[0004] The present invention aims to overcome the above-mentioned disadvantages of the prior art and to provide an electric toothbrush in which the distance between the left and right brush heads can automatically adapt to the thickness of the teeth during the brushing process.

[0005] An electric toothbrush comprises a brush handle and a brush head, wherein the brush head comprises a left-rotating brush and a right-rotating brush which are arranged on a brush shaft facing each other, the right end of the brush shaft being rotatably arranged in an axial hole at the upper end of the brush handle and being axially positioned on the axial hole by the right-rotating brush and the shaft cap at the right end of the brush shaft, the power source arranged in the brush handle being connected to the gear on the right side of the right-rotating brush via a transmission shaft in the brush handle, and the right-rotating brush drives the brush shaft to rotate; the bristles of the left-rotating brush and the right-rotating brush both comprise inner circle bristles and outer circle bristles, the angle between the inner circle bristles and the brush shaft being smaller than the angle between the outer circle bristles and the brush shaft; the characteristic is that the left-rotating brush can be slidably mounted on the brush shaft, an elastic body is arranged between the left-rotating brush and the brush shaft, and the spring makes the left-rotating brush and the right-rotating brush approach each other.

[0006] Preferably, a fixed column is installed at the left end of the shaft brush, the right side of the left-rotating brush is provided with bristles, and the left side is connected to a sleeve, the longitudinal axis of the sleeve is in the same straight line as the brush shaft, the sleeve can be axially slidably mounted on the fixed column, and a key for driving the left-rotating brush to rotate is provided between the sleeve and the fixed column.

[0007] Preferably, the elastic body is arranged in the sleeve and sleeved on the brush shaft, and two ends of the elastic body respectively abut against the right side surface of the fixed column and the left side surface of the left-rotating brush.

[0008] Preferably, the elastic body is a spring, and may also be made of silicone or rubber.

[0009] The bristles of the present invention have a certain rigidity. During the process of brushing teeth, if the distance between the left and right bristles is less than the thickness of the teeth, the bristles of the left-rotating brush head will push the left-rotating brush head to slide along the brush shaft and away from the right-rotating brush head. If the distance between the left and right bristles is greater than the thickness of the teeth, the spring will pull the left-rotating brush and the right-rotating brush closer.

[0010] The advantages of the present invention are: during the toothbrushing process, the distance between the bristles of the left and right brushes can automatically adapt to the thickness of the teeth, ensuring that the ends of the bristles can contact the sides of the teeth, the cleaning efficiency of the bristles is high, and the comfort level of the human oral cavity is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of the rotating brush heads on both sides of an embodiment of the present invention when they are brought close together.

[0012] Figure 2 It is a schematic structural diagram of the rotating brush heads on both sides of an embodiment of the present invention when they are separated.

[0013] Figure 3 It is a partial enlarged view of the rotating brush head of the present invention.

[0014] Figure 4 It is an exploded view of the rotating brush head of the present invention.

[0015] Figure 5 It is a left side view of the present invention. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral or ground connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The meanings of the numbers of the components in the figure are: brush handle 1, brush shaft 2, left-rotating brush 3, right-rotating brush 4, spring 5, fixing column 6, sleeve 7, key 8.

[0020] An electric toothbrush comprises a brush handle 1 and a brush head, wherein the brush head comprises a left-rotating brush 3 and a right-rotating brush 4 which are arranged opposite to each other on a brush shaft 2, wherein the right end of the brush shaft 2 is rotatably arranged in an axial hole at the upper end of the brush handle 1 and is axially positioned on the axial hole by the right-rotating brush 4 and an axial cap at the right end of the brush shaft 2, wherein a power source arranged in the brush handle 1 is connected to the gear on the right side of the right-rotating brush 4 through a transmission shaft in the brush handle, and the right-rotating brush 4 drives the brush shaft 2 to rotate; the bristles of the left-rotating brush 3 and the right-rotating brush 4 both comprise inner circle bristles and outer circle bristles, and the angle between the inner circle bristles and the brush shaft is smaller than the angle between the outer circle bristles and the brush shaft; the left-rotating brush can be slidably mounted on the brush shaft of the brush, and a spring 5 is arranged between the left-rotating brush 3 and the brush shaft 2, and the spring 5 makes the left-rotating brush 3 and the right-rotating brush 4 approach each other.

[0021] A fixed column 6 is installed at the left end of the shaft brush 2, the right side of the left-rotating brush 3 is provided with bristles, and the left side is connected to a sleeve 7, the longitudinal axis of the sleeve 7 is on the same straight line as the brush shaft 2, the sleeve 7 can be axially slidably sleeved on the fixed column 6, and a key 8 for driving the left-rotating brush 3 to rotate is provided between the sleeve 7 and the fixed column 6.

[0022] The spring 5 is arranged in the sleeve 7 and sleeved on the brush shaft 2. The two ends of the spring 5 respectively abut against the right side of the fixing column 6 and the left side of the left-rotating brush 3.

[0023] The spring 5 may also be made of elastic materials such as silicone or rubber.

[0024] The bristles of the present invention have a certain rigidity. During the process of brushing teeth, if the distance between the left and right bristles is smaller than the thickness of the teeth, the bristles of the left-rotating brush head 3 will push the left-rotating brush head 3 to slide along the brush shaft 2 and away from the right-rotating brush head 4. The spring 5 makes the left-rotating brush head 3 and the right-rotating brush head 4 tend to approach each other, so that the ends of the bristles of the rotating brush heads on both sides are close to the sides of the teeth.

[0025] If the distance between the left and right bristles is greater than the thickness of the teeth, the spring 5 will pull the left-rotating brush 3 and the right-rotating brush 4 closer together.

[0026] During the toothbrushing process, the distance between the bristles of the left and right brushes can automatically adapt to the thickness of the teeth, ensuring that the ends of the bristles can be closely attached to the sides of the teeth, and the cleaning efficiency of the bristles is relatively high.

Claims

1. An electric toothbrush, comprising a brush handle and a brush head, wherein the brush head comprises a left-rotating brush and a right-rotating brush disposed on a brush shaft facing each other, the right end of the brush shaft being rotatably disposed in an axial hole at the upper end of the brush handle and being axially positioned on the axial hole by the right-rotating brush and the shaft cap at the right end of the brush shaft, the power source disposed in the brush handle being connected to the gear on the right side of the right-rotating brush via a transmission shaft in the brush handle, and the right-rotating brush drives the brush shaft to rotate; the bristles of the left-rotating brush and the right-rotating brush both comprise inner-circle bristles and outer-circle bristles, the angle between the inner-circle bristles and the brush shaft being smaller than the angle between the outer-circle bristles and the brush shaft; the characteristics are as follows: The left-rotating brush can be slidably sleeved on the brush shaft, and an elastic member is arranged between the left-rotating brush and the brush shaft, and the elastic member makes the left-rotating brush and the right-rotating brush approach each other; A fixed column is installed at the left end of the brush shaft, bristles are arranged on the right side of the left-hand rotating brush, and a sleeve is connected to the left side. The longitudinal axis of the sleeve is in the same straight line as the brush shaft. The sleeve can be axially slidably sleeved on the fixed column, and a key for driving the left-hand rotating brush to rotate is arranged between the sleeve and the fixed column; The elastic member is arranged in the sleeve and sleeved on the brush shaft, and two ends of the elastic member respectively abut against the right side of the fixed column and the left side of the left-rotating brush.

2. The electric toothbrush according to claim 1, characterized in that: The elastic member is a spring.

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