KR102170274B1 - Electic toothbrush - Google Patents

Abstract

The present invention relates to an electric toothbrush, and more particularly, to an electric toothbrush having an improved coupling structure between a drive shaft and a toothbrush stand or a drive shaft and a brush, and includes first to third drive shafts installed in an electric toothbrush case and driven by a motor. Installed at the ends of the first and second toothbrush holders and the first and second toothbrush holders that are respectively coupled to the first and second drive shafts by the provided drive unit and the first and second coupling units to transmit the rotational force of the first and second drive shafts The first and second brushes are rotated by the first and second toothbrush holders to clean the teeth, and the auxiliary brushes are combined with the third driving shaft by the third coupling unit to brush the occlusal surfaces of the teeth by driving the third driving shaft. It has a third toothbrush stand provided.

Description

Electric toothbrush{Electic toothbrush}

The present invention relates to an electric toothbrush, and more particularly, to an electric toothbrush having an improved coupling structure between a drive shaft and a toothbrush stand or a toothbrush stand and a brush.

In general, a toothbrush is a tooth cleaning tool that removes foreign substances attached to a tooth or protects it from harmful bacteria, and a hand-operated toothbrush and an electric toothbrush are used for cleaning by moving a brush unit in a predetermined direction with respect to the tooth.

The method of using a toothbrush includes the scraping method in which the toothbrush is placed against the tooth and makes a reciprocating motion, the bass method in which the toothbrush is placed between the teeth and vibrates back and forth by tilting the toothbrush at about 45 degrees, and the toothbrush is placed on the teeth and gums. There is a method of vertical or circular motion.

Among the above-described methods of using a toothbrush, the bath method, the vertical or circular motion method is relatively excellent in cleaning and has the advantage of reducing damage to the gums. It is difficult to learn a suitable brushing method easily.

To this end, recently, electric toothbrushes have been developed and used to keep teeth clean and healthy by rotating the brush part from side to side using the motor's motor characteristics.

Electric toothbrushes are easier to use than ordinary toothbrushes, so children and the elderly have the advantage of being easy to clean teeth without special training and being portable, and there is a trend of increasing use.

In Korean Patent Registration No. 10-0745842 (2007.07.27.), an electric toothbrush is posted. The posted electric toothbrush includes a case equipped with a motor; First and second toothbrush holders rotatably installed in the case, having elasticity, and provided with brushes at ends; It is installed in the case and is installed between the motor and the first and second toothbrush holders, and includes a power transmission unit for rotating each of the first and second toothbrush holders, and a vibration generator for vibrating the first and second toothbrush holders.

In addition, Korean Patent Registration No. 10-0529409 (November 10, 2005) discloses a two-way electric toothbrush, and international patent application PCT/KR02/ 01334 discloses an electric toothbrush using two brushes.

The conventional electric toothbrush configured as described above can simultaneously clean the inner and outer surfaces of the teeth, but it is difficult to replace the brushes for cleaning the teeth. In particular, in the case of electric toothbrushes, the replacement cycle is relatively short because the brush is very abrasion.

Korean Patent Registration No. 10-0745842 (2007.07.27.) Republic of Korea Patent Registration No. 10-0745842 (2007.07.27.) International patent application PCT/KR02/ 01334

The technical task to be solved of the present invention is to provide an electric toothbrush that is easy to combine and separate a toothbrush stand on which a drive shaft and a brush for cleaning are installed.

Another technical problem to be solved by the present invention is to increase the adhesion between the brush and the tooth by the elastic force of the toothbrush when cleaning the front and rear surfaces of the teeth or the front and rear surfaces of the teeth, and further improve the cleaning efficiency of the teeth. To provide electric toothbrush.

The electric toothbrush for solving the technical problem of the present invention is installed in the electric toothbrush case and includes a drive unit having first and second drive shafts driven by a motor, and the first and second drive shafts by the first and second coupling units. First and second toothbrush holders that are coupled to each other and rotated by the first and second drive shafts, and first and second brushes that are installed at the ends of the first and second toothbrush holders and rotated by the rotation of the first and second toothbrush holders to clean teeth It is equipped with.

In the present invention, the first and second toothbrush holders coupled to the first and second drive shafts are installed inclined so as to gradually narrow the gap from the first and second drive shafts toward the first and second brushes.

Each of the first coupling units couples a first driving shaft installed in the case and a first toothbrush stand, and a first spiral inclined groove is formed on the first driving shaft, and the first toothbrush stand is provided with a rotational force of the first driving shaft. By this, a second spiral protrusion coupled with the first spiral inclined groove is formed, and the second coupling units respectively couple a second drive shaft and a second toothbrush stand installed in the case, and a second spiral shape is formed on the second drive shaft. An inclined groove is formed, and a second spiral protrusion coupled with the second spiral inclined groove is formed in the second toothbrush holder by the rotational force of the second driving shaft.

The first toothbrush holder and the first brush may be coupled to each other by a first brush coupling unit, and the second toothbrush holder and the second brush may be coupled to each other by a second brush coupling unit.

At this time, the first and second brushes are each twisted in a direction opposite to the rotational direction of the first and second driving shafts and have first and second brush frames supported along the twisted direction of the bristles, and the first brush coupling unit includes the The first brush frame coupling groove to which the first brush frame is coupled is formed at the end of the first toothbrush holder, and a third spiral inclined groove is formed on the inner circumferential surface thereof, and the first brush frame is in the first brush frame of the first brush. A third spiral protrusion is formed that is coupled with the third spiral inclined groove formed in the coupling groove,

The second brush coupling unit has a fourth spiral inclined groove formed on the inner circumferential surface of the second brush frame coupling groove to which the second brush frame is coupled to the end of the second toothbrush, and the second brush frame of the second brush includes the It is preferable that a fourth helical protrusion coupled with the fourth helical inclined groove formed in the first brush frame coupling groove is formed.

And the cover body part is supported on the end side of the cover support part extending from the case and surrounds one side of the first and second brushes, and the first and second brushes of the first and second brushes are installed at the end of the support part extending from the cover body part. The end of the two brush frame may be provided with first and two shaft receiving portions respectively rotatably supported.

An electric toothbrush for solving the above technical problem is a drive unit installed in the electric toothbrush case and having first and second drive shafts driven by a motor, and a third drive shaft that is rotated by the drive unit or reciprocated at a predetermined angle. First and second toothbrush holders that are respectively coupled to the first and second drive shafts by the exposed case and the first and second coupling units to transmit rotation of the first and second drive shafts, and the ends of the first and second toothbrush bars The first and second brushes that are installed and rotated by rotation transmitted to the first and second toothbrush holders to clean the teeth, and the occlusal surface of the teeth are coupled with the third driving shaft by the third coupling unit and driven by the third driving shaft. It has a third toothbrush stand provided with an auxiliary brush for brushing teeth.

The electric toothbrush according to the present invention can be combined and separated from the toothbrush stand by the rotational force of the drive shaft, so that it can be easily exchanged according to the wear of the brush, and the toothbrush stand has a tapered structure to the front side. Poor contact with teeth can be reduced, and further, the commercial value of electric toothbrushes can be increased.

1 is an exploded perspective view showing an embodiment of an electric toothbrush according to the present invention,
2 is a perspective view showing another embodiment of the electric toothbrush according to the present invention,
3 is an exploded perspective view of the embodiment shown in FIG. 2;
Figure 4 is an exploded perspective view showing excerpts of the first and second binding units according to the present invention;
5 is an exploded perspective view showing an extract of the first and second brush coupling units and the cover member according to the present invention;
6 is an exploded perspective view showing another embodiment of the first and second brush coupling units of the electric toothbrush according to the present invention;
7 is a perspective view showing another embodiment of the electric toothbrush according to the present invention.

The electric toothbrush according to the present invention is for simultaneously cleaning the inner and outer surfaces of the teeth or the inner and outer surfaces and the occlusal surfaces of the teeth by rotating the brush, and embodiments are shown in FIGS. 1 to 8.

As shown in Figure 1, the electric toothbrush 10 according to the present invention is installed in the case 11 of the electric toothbrush, and a drive unit having first and second drive shafts 21 and 25 driven by a motor, First and second toothbrush holders that are coupled with the first and second drive shafts 21 and 25 by the first and second coupling units 30 and 40 to transmit the rotational force of the first and second drive shafts 21 and 25 50 and 55, and first and second brushes 61 and 65 rotated by the first and second toothbrush holders to clean the teeth.

The electric chisel 10 is further provided with a third driving shaft 27 that rotates or reciprocates at a predetermined angle by a driving unit of the case 11 as shown in FIGS. 2 and 3, and a third coupling unit 15 The third toothbrush holder 70 may be further provided with an auxiliary brush 71 that is coupled to the third driving shaft 27 and brushing the occlusal surfaces of the teeth by driving the third driving shaft 27. The auxiliary brush 71 supported by the third toothbrush holder 70 is positioned between the two first and second brushes 61 and 65.

A tongue cleaner portion formed by forming a plurality of protrusions 73 as shown in FIG. 3 may be further provided on the rear side of the auxiliary brush 71 supported by the third toothbrush holder 70.

The electric toothbrush configured as described above will be described in more detail for each component as follows.

Inside the case 11, a motor and a driving unit that is driven by the motor to rotate the first and second drive shafts 21 and 25, rotate the third drive shaft, and reciprocate at a predetermined angle are installed.

This driving unit is published in Korean Patent Registration No. 10-0745842. Power supply to the motor for driving such a driving unit may be made of a battery capable of charging and discharging. In this case, the battery is installed in the case.

In addition, a driving unit driving the first and second driving shafts 21 and 25 and a driving unit driving the third driving shaft 15 may be separately provided.

And, as shown in Figures 1 to 3, the case 11 is provided with a cover support portion 12 having a relatively small diameter so that the third toothbrush holder can be wrapped around the upper side, and the end of the cover support portion 12 A cover member 80 surrounding one side of the first and second brushes 61 and 62 is installed on the side. The cover member 80 is made of a flexible elastic body.

The cover member 80 includes a cover body portion 83, and the cover body portion 80 includes first and second brushes 61 installed on the upper side of the first and second toothbrush holders 50 and 55. ) (65), that is, the first and two shaft receiving portions 81 and 82 for rotatably supporting the end of the brush frame to be described later are installed.

It is preferable that the first and second shaft receiving portions 81 and 82 are supported by the first and second supporting portions 81a and 82a extending from the cover body portion 83.

The first and second toothbrush holders 50 and 55 are coupled by the first and second drive shafts 21 and 25 and the first and second coupling units 30 and 40, respectively, to apply rotational force to the ends thereof. It is transmitted to the first and second brushes 61 and 65, and may be made of synthetic resin, metal, or non-ferrous metal having elasticity. The first and second drive shafts 21 and 25 have a configuration in which coupling members 22 and 26 for coupling with the first and second toothbrush holders 50 and 55 are installed.

The first and second driving shafts 21 and 25 and the coupling members 22 and 26 may be integrally formed. In the following embodiment, it will be described that the coupling members are integrally formed at the ends of the first and second driving shafts 21 and 25.

In addition, it is preferable that the first and second toothbrush holders 50 and 55 have irregularities formed on one side of the outer circumferential surface by a knurling process, so that the user can easily grip it when replacing.

The first and second toothbrush holders 50 and 55 have a structure arranged to be tapered so that the gap becomes narrower toward the end side, but is not limited thereto, and one of the first and second toothbrush holders 50 and 55 The toothbrush holder may be installed in an inclined manner so that the front side of the first and second toothbrush holders 50 and 55 may be narrowed.

As described above, the tapered structure of the first and second toothbrush holders 50 and 55 has the first and second toothbrush holders 50 and 55 inserted between the brushes 61 and 65 installed at the ends of the teeth for cleaning. 55) became widespread. Accordingly, the brushes 61 and 65 installed at the ends of the first and second toothbrush holders 50 and 55 are maintained in a parallel state, and the brushes provide uniform cleaning power to the teeth.

Referring to FIG. 3, the third toothbrush holder 70 may be coupled to the third driving shaft 27 by a third coupling unit 15, and the third coupling unit 15 is formed integrally with the coupling member. A third toothbrush stand coupling groove 16 may be formed in the three driving shaft 27 in the longitudinal direction. In addition, one end 17 of the third toothbrush stand 70 may be inserted into the third toothbrush stand coupling groove 16 to be coupled, and the third coupling unit 15 is not limited by the above-described embodiment, which will be described later. The structure of the first and second coupling units 30 and 40 can be applied.

The first coupling unit 30 coupling the first driving shaft 21 and the first toothbrush holder 50 includes coupling members 22 installed in the case 11, respectively, as shown in FIGS. 1 and 4. A first drive shaft (21) and a first toothbrush holder (50) are combined, and a first spiral inclined groove (31) is formed in the first drive shaft (21), and the lower end side of the first toothbrush holder (50) is The first helical protrusion 32 is formed to be screwed with the first helical inclined groove 31 by the rotational force of the first driving shaft 50. The first spiral inclined groove 31 and the first spiral protrusion 32 preferably have a relatively large pitch of the spiral, and may have a double spiral structure.

The second coupling unit 40 is substantially the same as the structure of the first coupling unit 30, and has a structure formed in a direction opposite to the helical direction. In other words, the second coupling unit 40 is for coupling the second driving shaft 25 and the second toothbrush holder 55 installed on the case 11, and a second spiral type to the second driving shaft 25 An inclined groove 41 is formed, and a second spiral protrusion 42 coupled with the second spiral inclined groove 41 by the rotational force of the second driving shaft 25 is provided at the end of the second toothbrush holder 55 do.

First and second toothbrush holders with first and second drive shafts 21 and 25 and first and second brushes 61 and 65 respectively installed by the first and second coupling units 30 and 40 configured as described above (50) In order to couple 55, the first and second spiral protrusions 32 and 42 are placed in the first and second spiral inclined grooves 31 and 41 of the first and second drive shafts 21 and 25. When the first and second drive shafts 21 and 25 are driven in contact with each other, the first and second spiral inclined grooves 31 and 41 and the first and second spiral protrusions 32 and 42 are driven by the rotational force of the drive shaft. Are each combined. Therefore, it is not necessary to separately rotate the first and second toothbrush holders 50 and 55 for coupling of the first and second toothbrush holders 50 and 55 with respect to the first and second drive shafts 21 and 25.

Alternatively, the first and second coupling units 30 and 40 have fixing grooves formed on the outer peripheries of the lower side of the first and second toothbrush holders 50 and 55, respectively, and the first and second driving shafts 21 A ball flanger that is formed with a groove in the longitudinal direction in (25) and is coupled to the fixing groove may be installed. At this time, the grooves formed in the first and second drive shafts 21 and 25 are preferably formed in an oval or polygonal shape to reduce slip caused by rotation of the combined first and second toothbrush holders 50 and 55. .

In another example, the first and second coupling units 30 and 40 have metal members attached to the magnets installed at the lower sides of the first and second toothbrush holders 50 and 55, respectively, and the first and second coupling units 30 and 40 A magnet to which the metal member is attached may be installed in a groove formed in the longitudinal direction of the drive shaft 21 and 25.

At this time, the grooves formed in the longitudinal direction on the first and second drive shafts 21 and 25 may have a tower shape or a polygonal cross section in order to prevent slip of the combined first and second toothbrush holders 50 and 55. have. In addition, lower portions of the first and second toothbrush holders 50 and 55 may be made of a metal material, and coupling members installed at ends of the first and second drive shafts may be made of magnets.

The first and second coupling units 30 and 40 are not limited by the above-described embodiments, and the coupling of the first and second drive shafts 21 and 25 and the first and second toothbrush holders 50 and 55 Any structure capable of transmitting the rotational force of the first and second drive shafts 21 and 25 to the first and second toothbrush holders is possible. For example, hook coupling grooves are formed on the first and second drive shafts 21 and 25, and unit hooks coupled to the hook coupling grooves are formed at the ends of the first and second toothbrush holders, and the first and second toothbrush holders Polygonal inlet grooves are formed at the ends of, and the first and second driving shafts 21 and 25 coupled thereto are formed in a polygonal shape, so that they may be forcibly fitted to each other.

Meanwhile, referring to FIG. 5, the first and second brushes 61 and 65 are twisted in the rotational direction of the first and second toothbrush holders 50 and 55, and the first and second brush heads 62 and 66 are First and second brush frames 63 and 67 are provided to support the first and second bristles 62 and 66 along the twisted direction.

The first and second brush frames 63 and 67 may be formed of a wire having elasticity, but are not limited thereto. When the brush frame is made of wire, the twisting directions for supporting the bristles 62 and 66 are formed in the same direction as the rotation direction of the first toothbrush holder 50 and the rotation direction of the second toothbrush holder 55, respectively. desirable. Therefore, as the load applied to the first and second brushes 62 and 65 increases, the wire of the first and second brushes 62 and 65 installed therein by the rotation of the first and second toothbrush heads increases. (62) (66) support is improved.

And at the end sides of the first and second brushes 61 and 65, that is, at the ends of the first and second brush frames 63 and 67, the bearing portions 81 and 82 of the cover member 80 are supported. First and second journal portions 84 and 85 are provided. The first and second journal parts 84 and 85 allow the rotation of the first and second brushes 61 and 65 to be stably performed, and are supported by the shaft receiving parts 81 and 82, so when cleaning teeth It can increase the adhesion of the teeth of the brush.

The outer circumferential surfaces of the first and second journal portions 84 and 85 formed on the first and second brush frames 63 and 67 are formed to prevent separation from the first and second shaft receiving portions 81 and 82, respectively. 1 and 2 protruding jaws 84a and 85a are formed.

On the other hand, the first and second brush frames 63 and 67 of the first and second brushes 61 and 65 are the ends of the first and second toothbrush holders 50 and 55 and the first and second brush coupling units 91 It is installed to be coupled and detachable by) (95), and the coupling may be made by force fitting or screwing.

On the other hand, the first brush coupling unit 91 for coupling the first toothbrush holder 50 and the first brush 61, and a second brush coupling unit 95 for coupling the second toothbrush holder 55 and the second brush 65 ) Is shown in FIG. 6.

Referring to the drawings, the first brush coupling unit 91 has a first brush frame coupling groove 92 to which the first brush frame 63 is coupled to an end portion of the first toothbrush holder 50, and an inner peripheral surface thereof A third spiral inclined groove 93 is formed, and in the first brush frame 63 of the first brush 61, a third spiral inclined groove 93 formed in the first brush frame coupling groove 92 and A third helical protrusion 94 to be coupled is formed.

The second brush coupling unit 95 has a second brush frame coupling groove 96 to which the second brush frame 67 is coupled to the end of the second toothbrush holder 55, and a fourth spiral slope on the inner circumferential surface thereof The groove 97 is formed, and the second brush frame 67 of the second brush 65 has a fourth spiral shape coupled to the fourth spiral inclined groove 97 formed in the first brush frame coupling groove 96 Protrusion 98 is formed.

The first and second toothbrush holders 50 and 55 and the first and second brush frames 63 and 67 are combined, that is, the first and second brush combination units 91 and 95 are in accordance with the above-described embodiment. The structure of the first and second bonding units may be applied without being limited thereto.

And as shown in FIG. 7, the first and second drive shafts 21 and 25 are extended so that the first and second toothbrush holders are not used, and the first and second drive shafts 21 and 25 are at the ends of the first and second drive shafts 21 and 25. The first and second brushes 61 and 65 may be combined and used using a brush coupling unit. In this case, the brush coupling unit may use the same structure as the first and second coupling units described above.

To brush teeth using the electric toothbrush 10 according to the present invention configured as described above, toothpaste is supplied to the first and second brushes 61 and 65 installed on the first and second toothbrush holders 50 and 55, and , The brush heads of the first and second brushes 61 and 65 of the first and second toothbrush holders 50 and 55, that is, the bristles 62 and 66 are inside and outside the tooth (see FIG. 1) or inside The teeth are brushed while rotating in close contact with the outer and occlusal surfaces (see FIG. 2).

In the process of using the electric toothbrush as described above, in the case of replacement due to the wear of the first and second brushes 61 and 65, the first and second driving shafts 21 and 25 and the first and second brushes 61 at the ends. Remove and replace the first and second toothbrush holders 50 and 55 on which the )(65) are installed. Since the first and second drive shafts 21 and 25 and the first and second toothbrush holders 50 and 55 are coupled by the first and second coupling units 30 and 40, as mentioned in the above embodiment, It is easy to combine and separate together. In particular, the first and second coupling units 30 and 40 have first and second spiral inclined grooves 31 and 41 formed on the first and second drive shafts 21 and 25, respectively, and the first and second toothbrush holders ( When the first and second spiral protrusions 32 and 42 are formed on 50) and 55, they can be combined by rotation of the first and second drive shafts 21 and 25, so that the user can It is possible to easily couple and separate the first and second toothbrush holders 50 and 55 in which the first and second brushes 61 and 65 are installed, even without familiarity.

The present invention has been described with reference to the embodiments shown in the drawings, but these are only exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical idea of the attached registration claims.

10: electric toothbrush 11: case
30: first coupling unit 40: second coupling unit
50: first toothbrush holder 55: second toothbrush holder
91: first brush coupling unit 70: third toothbrush holder
95: second brush coupling unit

Claims (11)

A drive unit installed in the case of the electric toothbrush and having first and second drive shafts driven by a motor;
First and second toothbrush holders respectively coupled to the first and second driving shafts by first and second coupling units to transmit rotational force of the first and second driving shafts;
First and second brushes are installed at the ends of the first and second toothbrush bars and rotated by the first and second toothbrush bars to clean teeth, and
Each of the first coupling units couples a first driving shaft installed in the case and a first toothbrush stand, and a first spiral inclined groove is formed on the first driving shaft, and the first toothbrush stand is provided with a rotational force of the first driving shaft. By this, a first spiral protrusion coupled with the first spiral inclined groove is formed,
The second coupling units respectively couple the second driving shaft and the second toothbrush stand installed in the case, and a second spiral inclined groove is formed on the second driving shaft, and the second toothbrush stand is provided with a rotational force of the second driving shaft. Thereby forming a second spiral protrusion coupled with the second spiral inclined groove,
The first toothbrush holder and the first brush are coupled to each other by a first brush coupling unit, and the second toothbrush holder and the second brush are coupled to each other by a second brush coupling unit. , The second brush is twisted in a direction opposite to the rotational direction of the first and second driving shafts, and first and second brush frames are provided which are supported along the twisted direction of the bristles,
The cover body part is supported on the end side of the cover support part extending from the case and surrounds one side of the first and second brushes, and the first and second brushes of the first and second brushes are installed at the end of the support part extending from the cover body part. Electric toothbrush, characterized in that the brush frame has first and two shaft receiving portions each rotatably supported. The method of claim 1,
The first and second toothbrush holders coupled to the first and second drive shafts are installed in an inclined manner so that the gap gradually narrows toward the first and second brushes from the first and second drive shafts. delete delete The method of claim 1,
In the first brush coupling unit, a first brush frame coupling groove to which the first brush frame is coupled is formed at an end of the first toothbrush, and a third spiral inclined groove is formed on an inner circumferential surface thereof, and the first brush The brush frame has a third helical protrusion coupled with a third helical inclined groove formed in the first brush frame coupling groove,
The second brush coupling unit has a fourth spiral inclined groove formed on the inner circumferential surface of the second brush frame coupling groove to which the second brush frame is coupled to the end of the second toothbrush, and the second brush frame of the second brush includes the An electric toothbrush, characterized in that a fourth helical protrusion coupled with a fourth helical inclined groove formed in the first brush frame coupling groove is formed.
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