CN1439342A - Rotating head device for electric toothbrush - Google Patents

Abstract

The invention provides a rotating head device of an electric toothbrush, which is provided with a brush head with bristles, wherein one side of the brush head is provided with an open slot, the brush head is rotatably arranged on a shell of the head of the electric toothbrush, the head of a rotating rod driven by a motor is arranged as an eccentric rod, and the eccentric rod extends into the open slot of the brush head to stir the brush head. The rotating head device takes the rotation of a motor as power and transmits the power to a brush head to swing, so that the motion of the electric toothbrush conforms to the traditional habit of manually brushing teeth. The brush head is movably and rotatably arranged on the shell, the bottom surface of the brush head is fixedly connected with a positioning shaft sleeve, a clamping part is arranged on the side surface of the positioning shaft sleeve, and a clamping piece is clamped on the clamping part of the positioning shaft sleeve to fix the positioning shaft sleeve in the shell, so that the brush head is further convenient to replace.

Description

Rotating head device for electric toothbrush

Field

The present invention relates to electric toothbrushes, in particular to rotating head devices on electric toothbrushes.

Background technique

Toothbrush is an indispensable article in people's daily life. Most of the existing toothbrushes are manual, and manual toothbrushes need to be powered by manpower. In order to make brushing your teeth more labor-saving, someone has proposed an electric toothbrush. The electric toothbrush supplies power to the motor through the battery, and the motor rotates through the deceleration mechanism to drive the bristles of the toothbrush head to rotate. Since the rotation of the motor is a circular motion, the drive of the brush head is also a circular motion. But this is different from the brush head movement mode of manual tooth brushing. The brush head of an electric toothbrush brushes teeth once per revolution, which reduces the efficiency of brushing teeth; When the brush head is rotated in a circle, it needs to take up a large rotating space, which does not meet the habit of manual tooth brushing and causes inconvenience.

Contents of the invention

The object of the present invention is to provide a rotating head device for an electric toothbrush, which uses the rotation of a motor as power and transmits the swing motion to the brush head, so that the movement of the electric toothbrush conforms to the traditional habit of manual tooth brushing.

The purpose of the present invention is further to provide a rotating head device for an electric toothbrush, which not only enables the brush head to perform a swinging motion consistent with traditional manual tooth brushing, but also enables the brush head to be easily replaced due to the structure of the rotating head device .

The object of the present invention is achieved in the following way: a rotating head device of an electric toothbrush, the rotating head device is provided with a brush head with bristles, one side of the brush head is provided with an open groove, and the brush head is rotatably mounted on the electric toothbrush head On the shell of the part, the head of a rotating rod driven by a motor is set as an eccentric rod, and the eccentric rod stretches into the opening groove of the brush head to stir the brush head.

According to the rotating head device of the electric toothbrush as described above, the brush head is fixedly and rotatably mounted on the housing through a positioning shaft and a bearing.

In the rotating head device of the electric toothbrush, the brush head is rotatably mounted on the casing, the bottom surface of the brush head is fixedly connected with a positioning sleeve, and the side of the positioning sleeve is provided with a card portion, and a card is stuck in the positioning The locking part of the shaft sleeve fixes the positioning shaft sleeve in the housing.

Wherein, the bottom surface of the brush head is fixedly connected with a positioning bushing as follows: the bottom surface of the brush head is provided with a central hole, and a positioning shaft with a Dongru head penetrates into the positioning bushing and is fastened to the center hole of the brush head. Further, the positioning shaft and the center hole of the brush head are fastened or clamped by threads.

In the rotating head device of the electric toothbrush, the card is detachably connected to the housing. Wherein, the card is provided with a curved portion, and the curved portion is inserted into a corresponding groove provided on the housing. The shell is configured as a top shell and a bottom shell that engage up and down, and a pressing bar presses the card and then is pressed tightly between the top shell and the bottom shell. The outward end of the card is set as a pull-out tail end. The inward end of the card is set as an insertion guide end with a chamfer.

Apply the rotating head device of the electric toothbrush provided by the present invention, the rotating head device obtains power from the rotating motion of the motor, and can convert the circular rotation into the circular swing of the brush head, imitating the back and forth motion of manual brushing, which is more in line with the traditional manual use Habit.

The rotating head device of the electric toothbrush provided by the present invention relies on the eccentric rod arranged on the head of the rotating rod to move the brush head to realize the swing, and has a simple structure and is easy to assemble.

Applying the rotating head device of the electric toothbrush provided by the present invention, the brush head can be replaced. After calculation, only 1/5 of the price of the original device is needed, which is equivalent to obtaining a brand-new electric toothbrush. Compared with the first electric toothbrush, it has good economic benefits. Moreover, since the swivel head device is provided with a clamping strip, the clamping strip can not only fix the rotating sleeve tightly connected with the brush head to fix the brush head, but also because the clamping strip is detachably connected to the head of the electric toothbrush. Inside the housing, therefore, the structure of the swivel head device also enables easy replacement of the brush head.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of an electric toothbrush, the cover of which has been removed, and the head of which exposes the rotating head device of the present invention.

Fig. 2 is a schematic perspective view of the rotating head device of the present invention with the front shell and the bottom shell opened.

FIG. 3 is an exploded perspective view of the rotary head device of the present invention.

Figure 4 is a side perspective view of the spin head device of the present invention.

Fig. 5A, Fig. 5B, Fig. 5C are the front view, side view and perspective view of some parts of the rotary head of the present invention to illustrate the movement.

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 5A, Fig. 5B and Fig. 5C, the rotating head device of the electric toothbrush provided by the present invention is arranged on the head of the electric toothbrush. The electric toothbrush is provided with a casing 1 , and a battery 101 is arranged inside the casing 1 , and the battery 101 supplies power to a motor 102 and is controlled by a switch 103 . The output end of the motor 102 drives the rotating rod 6 to rotate through the reduction mechanism 104 .

The rotating head device is provided with a brush head 3 with bristles 31, and one side of the brush head 3 is provided with an open groove 32 for the rotating rod 6 to stretch into and stir the brush head to make the rotating head rotate. The brush head 3 is rotatably mounted on the housing 1 of the electric toothbrush head, and the head of a rotating rod 6 driven by the motor 102 is set as an eccentric rod 61, and the eccentric rod 61 stretches into the opening groove 32 of the brush head to move brush head3.

When the rotating rod 6 rotated, the movement track of the eccentric rod 61 of its head was a circle, and because the eccentric rod 61 stretched into the opening groove 32 of the brush head 3, its motion would stir the brush head. Because the brush head is installed in the housing for rotation, the stirring of the brush head 3 by the eccentric rod 61 makes the brush head rotate left and right along its axis of rotation. When the eccentric lever 61 turned to the highest end and the lowest end, the brush head 3 turned to the original position, and when the eccentric lever 61 turned to the leftmost and rightmost ends, the brush head 3 also turned to the leftmost and rightmost ends. Therefore, the motion of the brush head is a side-to-side swing.

Wherein, the brush head 3 can be fixedly and rotatably mounted on the housing 1 through a positioning shaft and a bearing, which is a common structure, not shown in the figure.

Further, as shown in Fig. 3 and Fig. 4, the brush head of the present invention can also be rotatably mounted on the casing, which facilitates the replacement of the brush head. The bottom surface of this brush head 3 is fixedly connected with the positioning shaft sleeve 5, and the side of the positioning shaft sleeve 5 is provided with a clamping portion 52 (such as a square groove, an annular groove, etc.), and a card 7 is stuck on the clamping portion 52 of the positioning sleeve 5 to The positioning sleeve 5 is fixed in the housing 1 to prevent the brush head from bouncing upwards when rotating.

Wherein, the above-mentioned brush head bottom surface is fixedly connected with the positioning bushing as follows: the brush head 3 bottom surface is provided with a central hole position 33, and a positioning shaft 4 with a winter brush head 42 penetrates into the circular hole 51 of the positioning bushing 5 and is connected with the brush head 3 The central hole 33 of the brush head is fastened so that there is no looseness between the brush head and the positioning shaft, so that the positioning shaft follows the rotation when the rotating head rotates. The positioning shaft 4 can be screwed to the central hole 33 of the brush head 3 through the positioning shaft threaded section 41 of the positioning shaft 4, or the threaded section can be changed into an elastic clip end for clamping, so that the brush head drives the positioning shaft to rotate . Insert the positioning sleeve 5 into the positioning shaft 4 to prevent the stainless steel sheet from directly contacting the positioning shaft 4 and affecting its rotation effect.

Further, the card 7 is detachably connected to the housing 1 . The card 7 is provided with a curved portion 73 , and the curved portion 73 is inserted into a groove 113 correspondingly provided on the housing 1 .

Wherein, the housing 1 of the electric toothbrush is configured as a top shell 12 and a bottom shell 11 that engage up and down. Among them, the upper part of the face shell 12 is provided with a flat position 121 for placing the brush head 3, and the rotating rod pressing position 122 on the face shell 12 is used to control the rotating rod; In use, the large round hole 112 of the bottom case is the center of rotation of the brush head, the bottom case clamping position 113 is used to cooperate with the card 7, and the curved part 73 of the card 7 is stuck, and the tube position 114 of the bottom case is used to position the card bar 7 The straight position 74 and the bottom case slot 115 are used to place the bead 8 . A bead 8 is pressed between the face shell 12 and the bottom shell 11 after pressing the card 7 and the rotating rod 6 . The tenon 81 of the bead 8 is snapped into the card position 113 of the bottom case, and the lower part of the bead 82 is used to compress the card 7, preferably on the straight position 74 of the card 7, so as not to affect the functions of other parts of the card 7.

The outward end of the card 7 is set as a pull-out tail end 71, which is convenient for pulling it out through the tail end 71 when changing the card strip. The inward end of the card 7 is set as an inserting guide end 75 with a chamfer to play a guiding role when inserted. The middle part of the card 7 is provided with a round position 72, and the round position 72 is used to be stuck on the catch portion 52 of the positioning shaft sleeve 5 to block the positioning shaft sleeve 5 to prevent it from tilting upward without affecting the positioning of the positioning shaft sleeve 5. turn.

According to the above structure, the rotating head device of the present invention is not only simple in structure and easy to assemble, but also easy to replace the brush head and more economical to use.

Claims (10)

1. A rotating head device for an electric toothbrush, characterized in that: the rotating head device is provided with a brush head with bristles, one side of the brush head is provided with an open groove, and the brush head is rotated and installed on the shell of the head of the electric toothbrush On the body, the head of a rotating rod driven by a motor is set as an eccentric rod, and the eccentric rod extends into the opening groove of the brush head to move the brush head. 2. The rotating head device of an electric toothbrush according to claim 1, wherein the brush head is fixedly and rotatably mounted on the housing through a positioning shaft and a bearing. 3. The rotating head device of an electric toothbrush according to claim 1, characterized in that: the brush head is rotatably mounted on the casing, the bottom surface of the brush head is fixedly connected with a positioning bushing, and the side of the positioning bushing is set There is a card part, and a card is stuck on the card part of the positioning shaft sleeve to fix the positioning shaft sleeve in the housing. 4. The rotating head device of an electric toothbrush according to claim 3, characterized in that: the bottom surface of the brush head is fixedly connected with a positioning bushing: the bottom surface of the brush head is provided with a central hole, and a positioning shaft with a Dongru head After the shaft passes through the positioning sleeve, it is fastened with the center hole of the brush head. 5. The rotating head device of an electric toothbrush according to claim 4, wherein the positioning shaft and the central hole of the brush head are fastened or clamped by threads. 6. The rotating head device of an electric toothbrush according to claim 3, wherein the card is detachably connected to the casing. 7. The rotating head device of an electric toothbrush according to claim 6, characterized in that: said card is provided with a curved portion, and the curved portion is engaged in a corresponding groove provided on the casing. 8. The rotating head device of an electric toothbrush according to claim 6, characterized in that: the housing is set as a top shell and a bottom shell that are engaged up and down, and a pressing bar presses the card and presses it tightly on the top shell and bottom shell between shells. 9. The rotating head device of an electric toothbrush according to claim 6, wherein the outward end of the card is set as a pull-out tail end. 10. The rotating head device of an electric toothbrush according to claim 6, wherein the inward end of the card is set as an inserting guide end with a chamfer.

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