KR20030063658A - Toothbrush - Google Patents

Abstract

PURPOSE: An electric toothbrush is provided to improve a tooth brushing efficiency with an increased time and area that toothbrush hair is contacted to the teeth by increasing a rotation radius by mounting and rotating a toothbrush hair section on a shaft with curved ends. CONSTITUTION: The toothbrush comprises: a main body(1) which has a driving section(7) mounted thereto; a head section(3) which is connected to the front end of the main body and has a mounting groove formed thereto; a shaft(9) which rotates upon receipt of a rotary force from the driving section and changes the rotation into a cam rotation as the front end(17) being curved; and a toothbrush hair section(11) which is arranged to the mounting groove of the head section, is coupled to the front end(17) of the shaft(9) and brushes the teeth by rotation with the top portion disposed upward upon driving the driving section(7).

Description

Electric Toothbrush {TOOTHBRUSH}

The present invention relates to an electric toothbrush, and more particularly, to an electric toothbrush capable of efficiently cleaning a tooth by increasing the area and time in which the bristles are in contact with the teeth by increasing the radius of rotation by mounting the toothed portion at the end of the bent shaft. It is about.

In recent years, electric toothbrushes that can be easily brushed by mounting a toothbrush on a toothbrush are being widely used. The electric toothbrush is mainly equipped with a motor has a structure to brush the brush to drive the brush when driving the motor, various types have been developed according to the structure.

An example of such an electric toothbrush is disclosed in Korean Utility Model Publication No. 1998-14477 filed under the name of “electric toothbrush”. The electric toothbrush according to the present invention includes a motor, an output shaft connected to the motor, a driven shaft connected to the output shaft, and a toothed portion inserted into the driven shaft to brush teeth when rotating. Thus, when the motor is driven, the bristles planted on the pubic hair brush the teeth by rotating the pubic hair.

In the electric toothbrush having such a structure, the toothbrushing efficiency is determined by the time and the contact area of the toothbrush while the toothbrush rotates. In order to increase the contact time and area of the bristles, it is necessary to increase the rotation radius of the bristles.

However, the electric toothbrush is a rotational movement in the state in which the tooth portion is integrally connected to the linear driven shaft, the length of the tooth portion should be increased to increase the radius of rotation.

However, when the length of the tooth portion is increased, the size of the head portion of the electric toothbrush that accommodates the tooth portion is increased in size, so that it is difficult to insert the head portion into the mouth of the user when brushing the teeth.

In addition, when brushing the brush is rotated at a high speed there is a problem that foreign matter wiped by the bristle can be separated from the bristle by the centrifugal force and flow into the oral cavity.

In addition, another example of the electric toothbrush is disclosed in Korean Utility Model Publication No. 1995-2018 filed under the name "vibrating toothbrush". The vibrating toothbrush according to the present invention includes a motor, a shaft connected to the motor shaft, a cam attached to the shaft, a dust removal member installed to surround the cam, and a brush. Therefore, when the motor is driven, the brush is wiped by vibrating movement within a predetermined angle range by the dust removal member.

However, such an electric toothbrush has a problem in that the efficiency of removing foreign substances caught between the teeth is lower than that of the toothbrush by the rotational movement method because the vibrating motion is performed within a predetermined angle range.

On the other hand, Japanese Patent Application Laid-open No. Hei 5-237014, Japanese Patent Application Laid-open No. Hei 7-75607, Japanese Patent Application Laid-open No. Hei 8-103331, US Patent No. 4,335,480 and the like also disclose various embodiments of the electric toothbrush.

However, these powered toothbrushes are inconvenient to brush their teeth because of their complex structure and size.

Accordingly, the present invention has been made to solve the conventional problems as described above, the object of the present invention is to increase the radius of rotation by mounting the toothed portion on the end of the curved shaft to rotate the brush head to the teeth and It is to provide an electric toothbrush that can increase the area by increasing the area.

In addition, another object of the present invention, even if the rotation radius is increased, when the rotation by coupling the pulp portion to the shaft by the sliding method and guided by the cam so that the upper portion of the pulp portion is always maintained upward to maintain the receiving space of the head portion The reduction is to provide an electric toothbrush that is easy to brush.

In addition, another object of the present invention is to provide an electric toothbrush which can provide an ideal brushing tooth according to the tooth shape while reducing the size of the structure by reducing the parts necessary for driving the toothed portion.

1 is a perspective view showing an electric toothbrush in accordance with a preferred embodiment of the present invention.

2 is a view schematically showing the internal structure of the electric toothbrush shown in FIG.

FIG. 3 is an enlarged cross sectional view showing a portion “A” in FIG. 2;

4 is a cross-sectional view illustrating a section taken along the line “B-B” in FIG. 3.

FIG. 5 is a sectional view showing a "C-C line" cross section of FIG.

Figure 6 schematically shows a state in which the bristle of the electric toothbrush in accordance with a preferred embodiment of the present invention in operation.

7 is a view showing the internal structure of the electric toothbrush in accordance with another preferred embodiment of the present invention.

In order to realize the object of the present invention as described above, the present invention is a body mounted drive unit; A head portion connected to the front end of the body and having a seating groove formed therein; A shaft which receives rotational force from the driving unit and rotates, and the front end is bent to convert the rotational motion into a cam rotational motion; And it is disposed in the seating groove of the head, coupled to the front end of the shaft provides an electric toothbrush comprising a toothed portion for cleaning the teeth by rotating the upper portion is located upward when driving the drive unit.

According to a preferred embodiment of the present invention, a circular guide groove is formed in one side of the seating groove inside the head. The toothed portion is a siksol portion is formed in the coupling groove is rotatably inserted into the front end of the shaft, the cam protruding in front of the siksol portion is inserted into the guide groove of the head to guide the rotational movement of the siksol portion, and the It includes bristles planted on the upper surface of the brush portion.

The shaft rotates along the circular trajectory, and the cam protruding from the siksol portion is inserted into the guide groove and rotates to rotate along the elliptic trajectory, whereby the circular trajectory and the elliptic trajectory are in the same space and at the same time. By overlapping each other, the table brush portion is prevented from sliding with respect to the shaft.

Hereinafter, the structure of the electric toothbrush according to an embodiment of the present invention will be described in detail. As shown in Figures 1 and 2, the electric toothbrush proposed by the present invention is composed of a body (1), a head (3), the power source (5) and the drive unit (7) inside the body (1) And a shaft 9. In addition, the inside of the head (3) is provided with a dents (11) connected to the drive unit (7) for cleaning the teeth by rotating movement.

In the electric toothbrush having such a structure, the body 1 has a predetermined space formed therein, and the power supply unit 5 and the driving unit 7 are mounted therein.

The power supply unit 5 may be carried by using a battery such as a dry cell, or may be connected to an indoor power source by a power cable having a socket in addition to the dry cell.

The drive unit 7 is composed of a motor assembly 13 for generating a rotational force, and a reducer 15 for decelerating the rotational speed of the motor assembly 13 at a predetermined speed and transmitting it to the pubic portion 11.

The motor assembly 13 may be applied to both an AC motor and a DC motor, but a forward and reverse motor capable of forward rotation and reverse rotation is preferable. In addition, the reducer 15 is properly connected to the rotation shaft of the motor assembly 13 to appropriately reduce the rotation speed generated from the rotation shaft at a predetermined speed.

One side of the speed reducer 15 is integrally mounted with a shaft 9, and the toothed part 11 is mounted to the front end portion 17 of the shaft 9.

The shaft 9 has a shape in which the tip portion 17 is bent at a predetermined angle. Therefore, when the shaft 9 rotates, the tip 17 of the shaft 9 rotates along a larger circular trajectory than when the shaft 9 is not bent. As a result, the toothed portion 11 coupled to the tip portion 17 of the shaft 9 rotates in a large rotation radius.

The head portion 3 has a "∪" shape by forming a recessed recess 19 therein. In addition, the seating grooves 19 connected to the shafts 9 are disposed in the seating grooves 19 to rotate.

As shown in FIGS. 3 to 5, the toothed part 11 is planted on the upper portion of the table brush portion 21 connected to the front end portion 17 of the shaft 9 and the upper portion of the table brush portion 21 is teeth Brush (23) for wiping and the cam (27) for protruding on the front surface of the meal brush portion 21 is coupled to the guide groove 25 of the head 11 to guide the rotation direction of the pulp portion (11) It includes.

In the toothed portion 11 having such a structure, a coupling groove 29 is formed in the middle of the meal brush portion 21, and the tip portion 17 of the shaft 9 is inserted into the coupling groove 29. . At this time, a predetermined tolerance is formed between the outer circumferential surface of the tip portion 17 and the inner circumferential surface of the coupling groove 29. Therefore, when the shaft 9 is rotated, the siksol portion 21 is in sliding contact, so when the shaft 9 is rotated, the pulp 11 is rotated without being constrained by the rotation of the shaft 9. do.

At this time, the cam 27 is inserted into the guide groove 25 to prevent the meal brush portion 21 from being inverted.

The cam 27 is protruded from the front surface of the brush portion 21 has a predetermined length, and has a circular cross section. And, this cam 27 is inserted into the guide groove 25 of the head (11).

The guide groove 25 is formed in a predetermined depth on one side of the inner seating groove 19 of the head and forms a circle. Thus, the cam 27 is inserted into the guide groove 25 to rotate.

When the shaft 9 is rotated, the toothed portion 11 is rotated, and at this time, the cam 27 is inserted into the guide groove 25, so that the cam 27 and the guide groove 25 are rotated. By the tolerance of the tooth portion 11 is to be rotated along the elliptical trajectory (35; Fig. 6).

That is, the front end portion 17 of the shaft 9, as shown in Figure 6, the rotational movement along the circular trajectory 33, the cam 27 is a rotational movement along the elliptic trajectory (35) Done. Therefore, the circular section 33 and the elliptic trajectory 35 overlap each other in the same time and space so that the toothed part 11 rotates with respect to the shaft 9 during the circular motion of the toothbrush 21. Without the bristle 23 to maintain the upward direction to the rotational movement.

When the ridge 11 rotates, the tip 17 of the shaft 9 is bent, so that the radius of rotation of the ridge 11 is larger than the tip 17 is not bent. . Therefore, the toothbrush portion 23 of the electric toothbrush can be easily brushed because the time and area of contact with the teeth is wider than when the front end portion 17 of the shaft 9 is not bent. On the other hand, the size of the head can be reduced because other parts are not needed inside the head.

On the other hand, as another embodiment of the present invention, the cam 27 of the pulp portion 11 may be formed on the rear surface as well as the front surface of the pulp portion 11, as shown in FIG. That is, the cam 42 is formed to protrude from the front surface of the tooth portion 41, and the guide groove 43 is formed at a predetermined depth on the other side of the seating groove 19 (FIG. 3). The cam 42 is inserted into the guide groove 43. Therefore, when the teeth 41 are rotated, the teeth 42 are rotated to wipe the teeth as the cam 42 rotates along the guide groove 43 as in the embodiment.

Hereinafter, with reference to the accompanying drawings will be described in more detail the operation of the electric toothbrush in accordance with a preferred embodiment of the present invention.

As shown in FIGS. 1 to 7, when the user presses the switch 31 of the handle part, power is supplied from the power supply part 5 to drive the motor assembly 13, thereby generating rotational force. It is transmitted to the shaft 9 via the reducer 15.

Therefore, the shaft 9 is rotated, and the toothed portion 11 coupled to the tip of the shaft 9 is rotated.

At this time, the tip portion 17 of the shaft 9 is coupled to the coupling groove 29 by a predetermined tolerance, so that when the shaft 9 is rotated, the pulp portion 11 is in sliding contact.

In addition, the cam 27 is inserted into the guide groove 25 of the head 3 to rotate the guide groove 25 in order to prevent the tooth portion 11 from being inverted upon sliding contact. At this time, the cam 27 that rotates along the guide groove 25 makes an elliptic trajectory 35 by a tolerance with the guide groove 25 to rotate.

As a result, while the shaft 9 rotates, the circular trace 33 of the shaft 9 and the elliptical trace 35 of the cam 27 overlap each other, so that the food brush portion 21 is connected to the shaft 9. Sliding against is prevented. Therefore, when the brush part 21 rotates, the bristle 11 is not inverted but rotates in an upright state at each position 11a, 11b, 11c.

As described above, the bristle part 23 of the bristle part 11 can be accommodated without increasing the internal space of the head part 3 by rotating in the upward direction.

If necessary, the tooth assembly 11 may be rotated in the reverse direction by rotating the motor assembly 13 to clean the teeth.

As described above, the electric toothbrush according to the preferred embodiment of the present invention has an advantage of effectively brushing teeth by increasing the area and time of contact of the bristles by increasing the radius of rotation by mounting the toothed portion at the distal end of the bent shaft. have.

In addition, by coupling the pulp portion to the tip of the shaft by the sliding method so that the pulp portion is maintained upward even during rotation, it is easy to brush teeth by reducing the size of the head to accommodate the pulp in spite of the increase in the radius of rotation.

In addition, there is an advantage in terms of convenience in use by simplifying the structure and reducing the size by reducing the components inside the electric toothbrush.

Although the preferred embodiments of the present invention have been described for purposes of illustration, the present invention is not limited thereto, and various modifications can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings.

Claims (7)

Body to which the drive unit is mounted; A head portion connected to the front end of the body and having a seating groove formed therein; A shaft which receives rotational force from the driving unit and rotates, and the front end is bent to convert the rotational motion into a cam rotational motion; And The toothbrush disposed in the seating groove of the head, coupled to the front end of the shaft when the drive unit, the electric toothbrush including a tooth that rotates in a state in which the upper portion is positioned upward to brush the teeth. The electric toothbrush of claim 1, wherein a circular guide groove is formed at one side of the seating recess inside the head. According to claim 2, wherein the toothed portion is formed to form a coupling groove that is rotatably inserted into the front end of the shaft, and protruding to the front of the meal brush portion is inserted into the guide groove of the head portion to rotate the diet brush portion An electric toothbrush including a cam to guide and bristles to be planted on an upper surface of the brush portion. 4. The shaft of claim 3, wherein the shaft rotates along a circular trajectory, and the cam protruding from the table brush portion is inserted into the guide groove and rotates to rotate along the elliptic trajectory. And a circular tooth and an elliptic trajectory overlap each other to prevent the food brush portion from slipping against the shaft. The toothbrush of claim 1, wherein a circular guide groove is formed at the other side of the head in the seating groove. According to claim 5, wherein the tooth portion portion of the toothbrush portion is formed to form a coupling groove that is rotatably inserted into the front end of the shaft, protruding to the rear of the meal brush portion is inserted into the guide groove of the head portion to rotate the diet brush portion An electric toothbrush including a cam to guide and bristles to be planted on an upper surface of the brush portion. The electric toothbrush of claim 1, wherein the motor assembly includes a motor assembly capable of forward and reverse driving, such that the toothed portion is selectively rotatable in the forward and reverse directions.