KR101227742B1 - Brush head for electric toothbrush - Google Patents

Abstract

The present invention relates to an electric toothbrush bristle head of a simple structure that is coupled to the electric toothbrush body for providing power and can be brushed automatically by repeatedly reciprocating the bristles in the vertical direction to improve cleaning power.
The present invention for realizing this, bristles bristles bristles bristles; A bristle shaft extending from the bristle bristles, the bristle shaft having a first coupling protrusion formed at an adjacent portion of the bristles bristles, and having a shaft coupling portion coupled to a power transmission shaft of the electric handle part at a free end of the opposite side; A convex housing formed of a cylindrical shape and surrounding the bristle shaft as a whole, one end of which is inserted into the bristle bristles and a first fastening groove which is engaged with the first fastening protrusion is formed so as not to be separated; One end is bent at right angles to the inner side is fastened to the annular groove formed on the outer side of the bristle shaft, the other end is bent at right angles to contact the other end of the celebrity housing, the middle of the sawtooth type second fastening projection is formed And a rear cap coupled to the second sawtooth coupling groove formed at the corresponding portion of the housing, and adjacent to the other end, and having a line matching protrusion formed at the corresponding portion of the housing. The bristle shaft and the bristle shaft are characterized in that the repetitive reciprocating motion in the vertical direction in the same way as the axial rotational motion of the power transmission shaft.

Description

Brush head for electric toothbrush {BRUSH HEAD FOR ELECTRIC TOOTHBRUSH}

The present invention relates to an electric toothbrush bristle head coupled to the electric toothbrush body for providing power to automatically brush teeth in a repetitive reciprocating motion by the power, and more specifically to the brush head planted in the toothbrush head The present invention relates to an electric toothbrush bristle head having a simple structure that can improve cleaning power by automatically vibrating teeth repeatedly by vibrating vertically.

In general, good brushing habits are essential to keep your teeth healthy.

If you do not brush well, your teeth will be plaque, which can cause tooth decay and gum disease. A good way to brush your teeth is to repeatedly wipe from top to bottom along the bone between your teeth. However, brushing teeth in this way is not only time-consuming but also difficult to repeat uniformly.

Therefore, in recent years, many researches have been made for effective and convenient brushing of teeth, and as one of the results, various types of electric toothbrushes have been developed.

The conventionally developed electric toothbrush is used for personal hygiene to clean the plaque of teeth and gums and to remove food residues. The electric toothbrush has a built-in power generating device to generate power for automatic brushing, and is used by the user when brushing teeth. A power transmission shaft for transmitting power generated from the handle unit and the power unit to the outside, and detachably coupled to the power transmission shaft to automatically repeat the reciprocating motion and the brush head is planted to the toothbrush head for cleaning the teeth. consist of.

Such a conventional electric toothbrush has a number of advantages in use, as is well known, and is generally used to move the planting part of the toothbrush head by using a power unit built in the electric handle portion, the movement of the toothbrush itself by the user and the power To brush teeth by using the movement of the hair part by the device, it is possible to remove more effectively than a general toothbrush.

As an example of a conventional electric toothbrush, as shown in FIG. 1, Patent Publication No. 1999-0044511 discloses an electric handle 2 for accommodating an electric motor 4, and is connected to the electric motor 4 and driven by the electric motor. A shaft which is coupled to the brush attachment portion 5 in which the bristle head 3 is installed and rotates about an axis to vibrate the bristle head 3 or to continuously rotate the rotational motion A. In the electric toothbrush 1 which can be generated, the brush attachment portion 5 coupled to the electric handle 2 is a vibrating rotation or stroke B in a direction substantially parallel to the axis C, or An electric toothbrush is disclosed which performs a similar exercise.

In this electric toothbrush, the motor shaft 6 rotates by the operation of the electric motor 4, and this continuous rotational movement is performed by the four-section link 7 of the power transmission shaft 8 about the axis D. When the brush attachment part 5 is installed, this rotational motion is converted to an alternating rotational motion, and the bristle head which performs the same alternating rotational motion A about the axis C via the bevel gear part 9 ( 3) is delivered.

However, such a conventional electric toothbrush has a very complicated structure for driving the bristles. In addition, the bristles do not move up and down along the bones between the teeth, but are repeatedly rotated clockwise and counterclockwise along the teeth surface or oscillate vertically with respect to the tooth surface. There was a problem that you can not wipe.

The present invention has been invented to improve the above problems, as the power unit is built-in can be used in combination with the power transmission shaft to provide a reciprocating movement repeatedly at a predetermined angle in the circumferential direction of the power transmission shaft, bristles It is an object of the present invention to provide an electric toothbrush head for brushing the toothbrush head which has been implanted is vibrated in the up and down direction so that foreign matters caught in the bones between the teeth can be wiped clean while reciprocating along the bones between the teeth. .

Electric brush head bristle head according to the present invention for achieving the above object,
In the toothbrush head for the electric toothbrush coupled to the power transmission shaft of the electric handle portion for the electric toothbrush, the power transmission shaft receives the power oscillating in the axial rotation direction to automatically brush teeth in the vertical direction.

Bristle bristles with bristles;

A bristle shaft extending from the bristle bristles, the bristle shaft having a first fastening protrusion formed at an adjacent portion of the bristle bristles, while a power transmission shaft of the electric handle unit coupled to the free end of the bristle bristle;
The through groove is formed so that the power transmission shaft penetrates the rear end of the bristle shaft, the incision groove formed in the central portion, the elastic member formed by cutting the end of the bristle bristle side, and is formed on the inner surface of the elastic member Axial coupling portion consisting of a fixing protrusion;

A convex housing formed of a cylindrical shape and surrounding the bristle shaft as a whole, one end of which is inserted into the bristle bristles and a first fastening groove which is engaged with the first fastening protrusion is formed so as not to be separated;

One end is bent at right angles to the inner side is fastened to the annular groove formed on the outer side of the bristle shaft, the other end is bent at right angles to contact the other end of the celebrity housing, the middle of the sawtooth type second fastening projection is formed And a rear cap coupled to the second sawtooth coupling groove formed at the corresponding portion of the housing, and adjacent to the other end, and having a line matching protrusion formed at the corresponding portion of the housing. The bristle shaft and the bristle shaft are characterized in that the repetitive reciprocating motion in the vertical direction in the same way as the axial rotational motion of the power transmission shaft.

The first fastening protrusion, the first fastening groove, and the second fastening protrusion and the second fastening groove may be formed of a sawtooth-shaped protrusion and a groove which are inclined downward in the cross section and bent at a right angle in the separating direction.

As described above, in the present invention, the bristle shaft is coupled to the same center line as the center line of the power transmission shaft of the electric handle, and when the power transmission shaft vibrates in the axial rotation direction, the bristles also repeatedly reciprocate in the vertical direction. This has the advantage of excellent brushing and simple structure.

1 is a cross-sectional view of an example of a conventional electric toothbrush,
2 is an assembled perspective view of the present invention,
3 is a cross-sectional view of the present invention,
4 is an enlarged view of a portion P and a portion Q of FIG. 3;
Figure 5 shows an example of using the bristle head in accordance with the present invention in a conventional electric handle.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 shows an exploded perspective view of the bristle head according to an embodiment of the present invention, Figure 3 shows an assembled cross-sectional view of Figure 2, Figure 4 (a) is a P portion of Figure 3, (b) is a The enlarged view of the Q part is shown, respectively.

Reference numeral 10 denotes a bristle head according to the invention. The bristle head 10 is used to be coupled to the electric handle 2, the bristle is repeated in the vertical direction by receiving the power to vibrate in the axial rotation direction from the power transmission shaft (8) of the electric handle (2). You can brush your teeth automatically while reciprocating.

To this end, as described with reference to FIG. 1, the electric handle part 2 performs a cyclic reciprocating motion within a predetermined angle in the vertical direction of the motor shaft rotational direction in a continuous rotational motion of the electric motor 4 embedded therein. It has a motion switching mechanism (7) for switching so as to transmit to the power transmission shaft (8).

The bristle head 10 is formed of a cylindrical and the bristle shaft 23 extending from the bristle bristle part 22 in which the bristle 21 is planted, the cylindrical housing (30) and the celebration housing (30) surrounding the bristle shaft as a whole Consists of the rear cap 40 to be coupled to the rear of the electric handle (2) coupled to.

In the bristle shaft 23, bristle tufts 22 and adjacent portions of the bristle shaft 23 are formed with a plurality of first fastening protrusions 231 for engaging with the celebration housing 30. The first fastening protrusions 231 are inclined downward toward the bristles bristles 22 and are formed with a toothed protrusion formed at a substantially right angle in a direction opposite to the bristles bristles 22. This is to prevent the departure from each other when combined with the celebration housing (30).

In addition, when the celebration housing 30 is coupled to the side of the bristles bristles 22 that the tip of the celebration housing 30 is in contact with the groove 221 corresponding to the tip of the celebration housing 30 is formed, the celebration housing It is supposed that foreign matter does not enter into 30.

In addition, at the free end of the bristle shaft 23 opposite to the bristle bristle part 22 connected to the bristle shaft 23, a shaft engaging portion 24 to which the electric handle 2 and its power transmission shaft 8 are coupled is formed.

The shaft coupling portion 24 is formed with a through groove 241 through which the power transmission shaft 8 penetrates, and an incision groove 244 is formed in a central portion thereof, and an end of the bristle bristles 22 side is formed. An elastic member 242 formed by cutting is formed. In addition, a fixing protrusion 243 is formed on an inner side surface of the elastic member 242 (see FIG. 4B).

The fixed protrusion 243 is the bristle head 10 is powered unless the bristle head 10 is artificially pulled out of the power transmission shaft 8 when the power transmission shaft 8 is inserted into the incision groove 244. It is intended to be engaged with a groove (not shown) which is usually formed in the power transmission shaft 8 so as not to be separated from the transmission shaft 8.

In addition, the elastic member 242 is formed in a cantilever shape, one side of which is fixed and the other side of which is formed as a free end. ) Is made to return to its original state at the moment of engagement with the groove formed in the power transmission shaft (8), so that it is easy to fasten and can maintain a fixed state firmly.

In addition, the rear end of the celebration housing 30 is provided with an annular groove 245 formed along its circumference to be coupled to the rear cap 40 as described below.

The celebratory housing 30 is formed in a cylindrical shape so as to surround the bristle shaft 23 as a whole in the state where the bristle shaft 23 is fitted.

One end of the celebration housing 30 is inserted into the groove 221 formed in the bristles bristles 22 and corresponds to the first fastening protrusion 231 of the bristle shaft 23 at a portion adjacent to the insertion part. In the position is formed a sawtooth-type first fastening groove 31 to be engaged with the first fastening protrusion 231 (see Fig. 4 (a)).

Finally, the structure of the rear cap 40 will be described. The rear cap 40 is basically made of a cylindrical shape, it is made to be inserted into the rear of the celebration housing (30).

In addition, an annular second fastening protrusion 41 is formed along the periphery of the outer circumferential surface of the rear cap 40 so that the rear cap 40 is not separated when the rear cap 40 is inserted into the axial housing 30. A second fastening groove 32 is formed in the celebratory housing 30 corresponding to the second fastening protrusion 41. The second fastening protrusion 41 is inclined downward from the rear to the front direction and the rear is formed at a right angle bent and the second fastening groove 32 has a shape to be engaged with the second fastening protrusion 41 corresponding to. consist of. This is to facilitate the assembly between the rear cap 40 and the shaft housing 30, so as not to be detached well once assembled.

As such, the first fastening protrusion 231, the first fastening groove 31, and the second fastening protrusion 41 and the second fastening groove 32 are inclined downward in the fitting direction and bent at a right angle in the separating direction. Consists of a sawtooth-shaped projections and grooves, it is easy to assemble but not easy to separate. Since this is to prevent unintentional separation during use, if necessary, it is not difficult to separate as described above, but may be formed of arc-shaped protrusions and grooves to facilitate assembly and separation.

In addition, the forward end of the rear cap 40 is formed with an axial support 42 bent at right angles toward the center line. The shaft support 42 is coupled to the annular groove 245 of the bristle shaft 23 serves to support the reciprocating movement of the bristle shaft 23.

And, behind the rear cap 40, line matching protrusions 43 are formed. The line matching protrusion 43 is engaged with the line matching groove 33 formed at a position corresponding to the line matching protrusion 43 when the rear cap 40 is inserted into the celebratory housing 30. The groove of the power transmission shaft 8 is engaged when the power transmission shaft 8 of the electric handrail 2 is coupled with the bristle shaft 23 so that the cap 40 and the celebration housing 30 are always coupled at the same position. This is to engage with the fixing projections 243 of the elastic member 242.

As shown in FIG. 3, when the bristle head 10 and the electric handle 2 are coupled to each other to drive the motor unit M as a power source in a state in which the power transmission shaft 8 is coupled to the bristle shaft 23, the motor A rotational force is generated in the part M, and the rotational force is converted into a vibration to reciprocate the power transmission shaft 8 at a predetermined angle with respect to the axis centerline by gear shifting. The combined bristle shaft 23 also receives power from the power transmission shaft 8 to reciprocate at an angle in the axial rotational direction of the power transmission shaft 8 so that the bristle 21 reciprocates in the up and down direction while the tooth is in between. The foreign material can be removed.

Accordingly, the bristles can also reciprocate in the vertical direction along the vertical direction of the teeth, so that foreign substances caught in the bones between the teeth can be wiped clean.

Figure 5 shows an example of using the bristle head in accordance with the present invention in a conventional electric handle.

As shown in FIG. 5, a power transmission shaft 8 protruding from the electric handle 2 transmits power to the outside, and when the power transmission shaft 8 is pushed into the rear cap 4, the bristles are brushed. It enters into the cutting groove 244 of the shaft 23 and is fastened to the elastic member 242.

And the oscillating power in the axial rotational direction transmitted to the power transmission shaft 8 is able to brush teeth in the vertical direction when contacting the tooth surface by reciprocating the brush head up and down.

2-electric handrail, 8-power transmission shaft,
10-bristle head, 22-bristle bristle,
221-groove, 23-brush head shaft,
231-first fastening protrusion, 24-shaft coupling,
241-through grooves, 242-elastic members,
243-fixation protrusion, 244-incision groove,
245-annular groove, 30-celebration housing,
31-1st fastening groove, 32-2nd fastening groove,
33-line matching groove, 40-rear cap,
41-second fastening protrusions, 42-shaft supports,
43-Line matching protrusion.

Claims (2)

In the toothbrush head for the electric toothbrush coupled to the power transmission shaft of the electric handle portion for the electric toothbrush, the power transmission shaft receives the power oscillating in the axial rotation direction to automatically brush teeth in the vertical direction.
Bristle bristles with bristles;
A bristle shaft extending from the bristle bristles, the bristle shaft having a first fastening protrusion formed at an adjacent portion of the bristle bristles, while a power transmission shaft of the electric handle unit coupled to the free end of the bristle bristle;
The through groove is formed so that the power transmission shaft penetrates the rear end of the bristle shaft, the incision groove formed in the central portion, the elastic member formed by cutting the end of the bristle bristle side, and is formed on the inner surface of the elastic member Axial coupling portion consisting of a fixing protrusion;
A convex housing formed of a cylindrical shape and surrounding the bristle shaft as a whole, one end of which is inserted into the bristle bristles and a first fastening groove which is engaged with the first fastening protrusion is formed so as not to be separated;
One end is bent at right angles to the inner side is fastened to the annular groove formed on the outer side of the bristle shaft, the other end is bent at right angles to contact the other end of the celebrity housing, the middle of the sawtooth type second fastening projection is formed And a rear cap coupled to the second sawtooth coupling groove formed at the corresponding portion of the housing, and adjacent to the other end, and having a line matching protrusion formed at the corresponding portion of the housing. Toothbrush head and bristles bristle bristles for the electric toothbrush, characterized in that the repetitive reciprocating movement in the vertical direction in the same way as the axial rotational movement of the power transmission shaft. The method of claim 1, wherein the first fastening protrusion, the first fastening groove and the second fastening protrusion and the second fastening groove are inclined downwardly in the fitting direction and made of a tooth-shaped protrusion and groove bent at a right angle in the separating direction. Brush head for electric toothbrush, characterized in that.

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