WO2018201741A1

WO2018201741A1 - Electric toothbrush

Info

Publication number: WO2018201741A1
Application number: PCT/CN2017/118886
Authority: WO
Inventors: 王斌; 韩科; 苏仕祥; 陈超; 刘李明; 包泓; 袁明新
Original assignee: 江苏科那智能设备有限公司
Priority date: 2017-05-02
Filing date: 2017-12-27
Publication date: 2018-11-08
Also published as: CN107126285A; CN107126285B

Abstract

An electric toothbrush, relating to the field of electric toothbrush structures, particularly the improvement of a brush head driving mechanism. The electric toothbrush comprises: a brush head (1), a brush handle (2), a driving mechanism (3), and a battery (4). The brush head (1) is connected to one end of the brush handle (2). The driving mechanism (3) connects the brush head (1) and the battery (4) and drives the rotation of the brush head (1). One end of two elastic plates (35) is fixedly connected to one side of a sliding block (32) facing away from an electric magnet (31), and the other end thereof is respectively fixedly connected to two sides of the center of a rotatory seat (33). A position-limiting component (34) is connected to the brush handle (2) and the rotatory seat (33) or the elastic plates (35) for preventing the elastic plates (35) from moving along a length direction of the brush handle (2). The angle of inclusion between the two elastic plates (35) is an acute angle. The electric toothbrush as a whole has the advantages of a compact structure, good stability, good tooth-cleaning effect, low manufacturing costs and low application costs.

Description

Electric toothbrush

Technical field

The present invention relates to the field of electric toothbrush construction, and more particularly to improvements in the brush head drive mechanism.

Background technique

At present, electric toothbrushes are mostly divided into two types: rotary and vibrating. Among them, the rotary electric toothbrush is driven by a motor to rotate the circular brush head, thereby enhancing the friction effect while performing the ordinary toothbrush movement; and the vibrating electric toothbrush is The vibrating motor drives the brush head to perform high-frequency oscillation, thereby efficiently cleaning the interdental dirt.

However, whether it is a rotating electric machine or a vibrating electric motor, it has a certain service life and has a high cost, so that the price of the traditional electric toothbrush is always high, which has greatly affected the promotion and use of the electric toothbrush. At the same time, because people frequently turn off and start the rotating motor or the vibration motor when turning and changing the edge, the service life of the core driver of the electric toothbrush is greatly reduced, which brings extra cost to the use of the electric toothbrush. Increase.

Summary of the invention

The present invention is directed to the above problems, and proposes an electric toothbrush which is compact in structure, good in stability, good in tooth cleaning effect, low in manufacturing cost, and low in use cost.

The technical solution of the present invention comprises: a brush head, a handle, a driving mechanism and a battery, the brush head is connected to one end of the handle, the driving mechanism is connected between the brush head and the battery, and is used for driving the brush head to rotate ;

The driving mechanism includes an electromagnet, a slider, a rotating base, a limiting component and two elastic pieces, the electromagnet is fixedly connected in the handle and connected to the battery, and the sliding block is slidably connected in the handle, And a gap is left between the electromagnet and the electromagnet is movably connected to one end of the handle and connected to the brush head;

One end of each of the elastic pieces is fixedly connected to one side of the slider facing away from the electromagnet, and the other end is fixedly connected to two sides of the center of the rotating base respectively; the limiting component is connected to the handle and connected to the rotating base Or a spring piece for preventing the spring piece from being translated along the length of the handle.

The angle between the two shrapnels is an acute angle.

The limiting component is a pair of limiting slots, and the limiting slot is formed on the inner wall of the handle and is respectively sleeved in the middle of the two elastic pieces.

A gap is left between the two elastic pieces, the limiting component is a limiting shaft, one end of the limiting shaft is fixedly connected with the rotating base, and the other end is hinged in the handle, and the limiting shaft is located in the gap And set coaxially with the rotating seat.

A fixing piece is fixedly connected to a side of the sliding block facing the electromagnet, and a side of the rotating seat facing away from the brush head is provided with a boss, and two end faces of the boss are fixedly connected with a connecting piece, two One end of the elastic piece is integrally connected with the fixing piece, and the other end is integrally connected with the connecting piece.

The middle portion of the handle is opened with a sliding groove along the longitudinal direction thereof, the electromagnet is located at one end of the sliding groove, and the slider is slidably connected in the sliding groove, and the cross section of the sliding groove and the cross section of the slider are opposite The adapted polygon.

One end of the handle is provided with a through hole for accommodating the rotating seat, and the inner wall of the through hole is provided with at least one sealing groove, and the rotating seat is sleeved with a sealing ring adapted to the sealing groove.

A control switch and a control circuit are disposed between the electromagnet and the battery.

The brush head is detachably coupled to the rotating base.

The slider is a permanent magnet.

During the use of the invention, when the electromagnet is energized, the slider will be adsorbed on the electromagnet. At this time, since the elastic piece cannot directly translate under the action of the limiting component, the angle between the slider and the rotating base will be generated. Change (the angle is unchanged when the direct translation is performed, that is, the rotary seat only translates and does not rotate), thereby driving the rotary seat to rotate a certain angle (the specific value is related to the angle between the two elastic pieces and the displacement of the slider); and when the electromagnet is de-energized When the shrapnel is pulled down by the action of its own restoring force, the slider is reset and the rotating seat is reversed to the initial position. In this way, when the electric toothbrush is turned on and the electromagnet is frequently powered and de-energized under the influence of the control circuit, the rotating base will continuously rotate forward and reverse, thereby stably and efficiently driving the brush head to reciprocate, and then to the user. The teeth are efficiently cleaned in depth. The invention has the advantages of compact structure, good stability, good tooth cleaning effect, low manufacturing cost and low use cost.

DRAWINGS

1 is a schematic structural view of a first embodiment of the present invention,

Figure 2 is a top view of Figure 1

Figure 3 is a cross-sectional view taken along line A-A of Figure 2,

Figure 4 is a schematic view showing the internal structure of the first embodiment of the present invention,

Figure 5 is a perspective view of Figure 4,

Figure 6 is a schematic structural view of a partial handle in the first embodiment of the present invention;

Figure 7 is a schematic structural view of a second embodiment of the present invention,

Figure 8 is a plan view of Figure 7;

9 is a schematic structural view of a driving mechanism in a second embodiment of the present invention,

Figure 10 is a schematic view showing the internal structure of the second embodiment of the present invention,

Figure 11 is a perspective view of Figure 10;

1 is a brush head, 2 is a handle, 3 is a drive mechanism, 31 is an electromagnet, 32 is a slider, 320 is a fixed piece, 33 is a rotating seat, 330 is a connecting piece, 331 is a boss, 34 is limited The bit assembly, 341 is a limit slot, 342 is a limit axis, 35 is a spring, and 4 is a battery.

detailed description

The present invention is illustrated in Figures 1-11, and it is to be noted that, to ensure a clear illustration of the drawings, only a portion of the handle of the drive mechanism is shown, and the handle of the battery is not shown. The brush head 1 includes a brush holder 1, a driving mechanism 3 and a battery 4, and the brush head 1 is connected to one end of the handle 2. The driving mechanism 3 is connected between the brush head 1 and the battery 4, and is used for driving the brush. Head 1 rotation;

The driving mechanism 3 includes an electromagnet 31, a slider 32, a rotating base 33, a limiting component 34 and two elastic pieces 35. The electromagnet 31 is fixedly connected in the handle 2 and connected to the battery 4. The slider 32 is slidably coupled to the handle 2 and has a gap with the electromagnet 31. The rotary seat 33 is movably connected to one end of the handle 2 and connected to the brush head 1;

One end of each of the elastic pieces 35 is fixedly connected to one side of the slider 32 facing away from the electromagnet 31, and the other end is fixedly connected to two sides of the center of the rotating base 33 respectively; the limiting component 34 is connected to the handle 2. The rotating seat 33 or the elastic piece 35 is connected to prevent the elastic piece 35 from being translated along the length direction of the handle 2.

The angle between the two elastic pieces 35 is an acute angle.

When the electromagnet is energized, the slider will be adsorbed on the electromagnet. At this time, since the elastic piece cannot directly translate under the action of the limiting component, the angle with the rotating base will change (directly when panning) The angle is constant, that is, the rotating seat only translates and does not rotate), thereby driving the rotating base to rotate a certain angle (the specific value is related to the angle between the two elastic pieces and the displacement of the sliding block); and when the electromagnet is de-energized, the elastic piece will be in itself The action of the restoring force pulls down the slider to reset and reverses the swivel seat to the initial position. In this way, when the electric toothbrush is turned on and the electromagnet is frequently powered and de-energized under the influence of the control circuit, the rotating base will continuously rotate forward and reverse, thereby stably and efficiently driving the brush head to reciprocate, and then to the user. The teeth are efficiently cleaned in depth.

The following is a representative representation of the limit components in two different embodiments:

In the first embodiment, as shown in FIG. 1-6, the limiting component 34 is a pair of limiting slots 341. The limiting slot 341 is defined on the inner wall of the handle 2 and is respectively sleeved on the two elastic pieces. The middle of 35. When the electromagnet is energized, since the middle of the two elastic pieces is limited by the limiting slot, when the slider is translated toward the electromagnet, the angle between the two elastic pieces will gradually become smaller, and the two elastic pieces are connected to the rotating base. The spacing between one end will also gradually become smaller, which will drive the rotating seat to perform a small translation while rotating at a certain angle. When the electromagnet is de-energized, the slider will slide away from the electromagnet under the self-restoring force of the elastic piece. Move, the rotary seat will also be reversed and reset. In this way, when the electric toothbrush is turned on and the electromagnet is frequently powered and de-energized under the influence of the control circuit, the rotating base will continuously rotate forward and reverse.

In the second embodiment, as shown in FIG. 7-11, a gap is left between the two elastic pieces 35. The limiting component 34 is a limiting shaft 342. One end of the limiting shaft 342 is fixedly connected to the rotating base 33. The other end is hinged in the handle 2, and the limiting shaft 342 is located in the gap and is disposed concentrically with the rotating base 33. Thereby the rotating seat will only be able to synchronize with the limit axis and make a rotational movement with respect to the handle. In this way, when the electromagnet is energized, the slider is translated toward the electromagnet, and the elastic piece is stretched, and the angle between the slider and the rotating seat and the angle with the slider will gradually become larger, thereby driving the rotating seat to rotate through a certain angle; When the electromagnet loses power, the slider will slide away from the electromagnet under the self-restoring force of the shrapnel, and the rotating seat will also be reversed and reset. When the electric toothbrush is turned on and the electromagnet is frequently powered and de-energized under the influence of the control circuit, the rotating base will continuously rotate forward and reverse.

A fixing piece 320 is fixedly connected to a side of the sliding block 32 facing away from the electromagnet 31. A side of the rotating base 33 facing away from the brush head 1 is provided with a boss 331, and the end faces of the boss 331 are respectively A connecting piece 330 is fixedly connected, and one end of each of the elastic pieces 35 is integrally connected with the fixing piece 320, and the other end is integrally connected with the connecting piece 330. Therefore, the elastic piece and the fixing piece and the connecting piece have an angle of 90-180°, so that the elastic piece has a high connection stability, and the folding angle between the elastic piece and the fixing piece and the connecting piece is made. The utility model has the advantages of good elastic deformation capability and strong deformation resetting capability, thereby greatly improving the use effect of the shrapnel and reducing the manufacturing difficulty and the installation difficulty of the shrapnel.

The middle portion of the handle 2 is provided with a sliding groove along the longitudinal direction thereof, the electromagnet 31 is located at one end of the sliding groove, and the slider 32 is slidably connected in the sliding groove, the cross section of the sliding groove and the slider The cross section is a matching polygon. Thereby the slider can be linearly reciprocated only along the length of the handle.

One end of the handle 2 is provided with a through hole for accommodating the rotating seat, and the inner wall of the through hole is provided with at least one sealing groove, and the rotating seat 33 is sleeved with a sealing ring adapted to the sealing groove. Therefore, the shrapnel has a good effective sealing and protection function, so as to effectively extend the service life of the driving mechanism as a whole.

A control switch and a control circuit are disposed between the electromagnet 31 and the battery 4. Therefore, after the electric toothbrush is turned on, the control electromagnet is quickly switched between power-on and power-off.

The brush head is detachably coupled to the rotating base. This makes it easy for people to clean or replace the brush head.

The slider is a permanent magnet. In this way, when the currents in the electromagnets are opposite in direction, the opposite polarity can be generated, thereby providing a sufficient restoring force when the rotating seat is reversed, that is, the overall stability and reliability in use are effectively improved.

Claims

An electric toothbrush comprising a brush head, a handle, a driving mechanism and a battery, the brush head being connected at one end of the handle, the driving mechanism being connected between the brush head and the battery, and for driving the brush head to rotate; Characterized by

The driving mechanism includes an electromagnet, a slider, a rotating base, a limiting component and two elastic pieces, the electromagnet is fixedly connected in the handle and connected to the battery, and the sliding block is slidably connected in the handle, And a gap is left between the electromagnet and the electromagnet is movably connected to one end of the handle and connected to the brush head;

One end of each of the elastic pieces is fixedly connected to one side of the slider facing away from the electromagnet, and the other end is fixedly connected to two sides of the center of the rotating base respectively; the limiting component is connected to the handle and connected to the rotating base Or a spring piece for preventing the spring piece from being translated along the length of the handle.
The electric toothbrush according to claim 1, wherein an angle between the two elastic pieces is an acute angle.
The electric toothbrush according to claim 2, wherein the limiting component is a pair of limiting slots, and the limiting slot is formed on the inner wall of the handle and is respectively sleeved on the two elastic pieces Central.
The electric toothbrush according to claim 2, wherein a gap is left between the two elastic pieces, the limiting component is a limiting shaft, and one end of the limiting shaft is fixedly connected to the rotating base, and The other end is hinged in the handle, and the limiting shaft is located in the gap and is disposed concentrically with the rotating seat.
The electric toothbrush according to claim 1, wherein a side of the slider facing away from the electromagnet is fixedly connected with a fixing piece, and a side of the rotating seat facing away from the brush head is provided with a boss. A connecting piece is fixedly connected to both end faces of the boss, and one end of each of the elastic pieces is integrally connected with the fixing piece, and the other end is integrally connected with the connecting piece.
The electric toothbrush according to claim 1, wherein a control switch and a control circuit are disposed between the electromagnet and the battery.
An electric toothbrush according to claim 1, wherein said brush head is detachably coupled to the rotating base.
An electric toothbrush according to claim 1, wherein said slider is a permanent magnet.