KR200365918Y1 - Structure of electrically powered toothbrush - Google Patents

Abstract

There is provided a structure of an electric toothbrush adapted to smoothly rotate the drive shaft connected to the bristle holder with the bristles implanted and the motor rotation shaft. The electric toothbrush may include: a drive shaft inserted into a rotating shaft coupler connected to the electric toothbrush handle to transmit the rotation of the motor to a drive pin eccentric with respect to a central axis; A toothbrush head formed integrally with the rotary shaft coupler by having a center pin inserted and fixed to a pin fixture formed at a center thereof, and having a locking protrusion formed at one inner surface thereof; Cylindrical lubrication tube is inserted into the center pin hole formed in the center of the rear surface where the bristles have been implanted, and engaging grooves and slots are formed at both sides thereof, so that the center pin is fitted into the lubrication tube, and the locking groove and the slot are formed. Each of the locking projections and the driving pin is configured to be installed.

Description

Structure of Electric Toothbrush {STRUCTURE OF ELECTRICALLY POWERED TOOTHBRUSH}

The present invention relates to an electric toothbrush, and more particularly, to the structure of the electric toothbrush that is made to smoothly rotate the drive shaft connected to the bristle brush holder and the motor rotation shaft.

Typically, the electric toothbrush 1 having a cylindrical brush head has a battery 12 and a switch 12 for selectively controlling the rotation of the motor, as shown in FIG. Handle 10, the rotary shaft coupler 40 coupled to the handle 10, the toothbrush head 20 and the bristle 32 formed integrally with the rotary shaft coupler 40 are planted to the toothbrush head ( It is composed of a bristle holder 32 coupled to 30).

The electric toothbrush 1 configured as shown in FIG. 1 converts the rotational motion of the motor into a reciprocating motion so that the bristle holder is rotated from side to side. Such an example is disclosed in detail in Published Patent No. 1999-021858 (electrically powered toothbrush: referred to as "prior art 1"), which was invented and filed by McDogel, Gregory Zone and published on March 25, 1999. .

The electrically driven toothbrush disclosed in the prior art 1 has a rotatable shaft having a remote end that is installed in a slot of the bristles on which the bristles are implanted, and the bristle holder is rotatably mounted in a post supported by the toothbrush head. The remote end is configured to draw an arc when the rotary shaft is rotated, and is coupled to drive the slot so that the bristle holder causes vibration.

However, the prior art 1 configured in this way is such that the bristle holder is simply fixed by a post pin inserted from the outside of the head into the bristle holder so that the bristle holder is detached from the toothbrush head or reciprocated by the rotation of the motor. There was a problem that the toothbrush head was broken due to severe friction of the pins.

As a conventional technology for solving the problems of the prior art 1, Utility Model Registration No. 20-03009483 registered as a utility model as of March 22, 2003 by the present applicant (electric toothbrush structure: "prior art 2" Is called).

The electric toothbrush structure disclosed in the prior art 2 integrally forms a central shaft and a central shaft hole in the center of each bristle-bearing bristle holder and the toothbrush head, and inserts the central shaft of the bristle holder into the central shaft hole of the toothbrush head. The structure of the hinge pivot that rotates the bristle holder in the form of engagement was improved.

However, the prior art 2 is not firm by forming the central shaft and the central shaft hole integrally at the center of each of the toothbrush holder and the toothbrush head made of a synthetic resin material, there is a lot of friction between the toothbrush holder and the toothbrush head vibration rotation of the toothbrush holder There was a problem of poor efficiency.

Therefore, the present invention has been made to solve the above problems, to provide a structure of the electric toothbrush that can be more robust to the combination of the toothbrush head and the brush head holder and to rotate the brush head holder more efficiently.

Another object of the present invention is to provide a coupling structure between the brush head holder and the toothbrush head to facilitate the rotation of the main shaft for rotating the brush head holder coupled to the toothbrush head in response to the rotation of the motor.

Another object of the present invention is to provide a toothbrush head and a bristle head combined with a metal center pin and a separation prevention part, and an electric toothbrush capable of rotating the bristle head at high speed by a drive head eccentrically disposed at a remote end of the main shaft. In providing a structure.

The present invention for achieving the above object and a handle having a switch for controlling the rotation of the motor by selectively supplying power to the motor and the motor; A drive shaft having a cylindrical structure and inserted into a rotation shaft coupler connected to the handle to transmit rotation of the motor to a drive pin eccentric with respect to a rotation center axis; A toothbrush head having a center pin inserted into and fixed to a pin fixture formed at a center thereof, and having a locking protrusion formed at one inner surface thereof, the toothbrush head integrally formed with the rotary shaft coupler; Cylindrical lubrication tube is inserted into the center pin hole formed in the center of the rear surface where the bristles are planted, and engaging grooves and slots are formed on both sides thereof so that the center pin is fitted into the lubrication tube, and the locking groove and the slot are formed. Characterized in that it comprises a bristle holder coupled to the toothbrush head so that the locking projection and the driving pin is located on each.

The drive shaft may include a main shaft coupled to a rotation axis of the central axis of the motor, a shaft bearing in close contact with an inner diameter of the rotation shaft coupler, and a connecting shaft having the same center axis as the central axis of the main shaft through the shaft bearing. It is characterized by consisting of an eccentric coupler having a driving pin eccentrically connected to the main shaft and eccentric with respect to the central axis.

The shaft bearing is a radial type bearing consisting of a rotary pipe having a central shaft hole into which the connecting shaft of the eccentric coupler is fitted, a lubrication band surrounding the rotary pipe, and a ball housing surrounding the lubrication band. .

Cooling holes are installed in the bottom surface of the locking projection of the toothbrush head and the section in which the driving pin is installed, so that water is introduced from the outside when the toothbrush holder is rotated to serve as a lubricant.

1 is a side view for explaining the configuration of a general electric toothbrush.

Figure 2 is a side view showing in section the bristle holder, toothbrush head and rotary shaft coupler of the electric toothbrush in accordance with a preferred embodiment of the present invention.

3 is an exploded cross-sectional view of the components shown in FIG. 2;

Figure 4 is a perspective view of the toothbrush head and a portion of the toothbrush holder shown in Figure 2 cut away.

5 is an exploded perspective view of a rotation center drive shaft according to a preferred embodiment of the present invention.

Figure 6 is a perspective configuration diagram extracting the main portion of the electric toothbrush in accordance with a preferred embodiment of the present invention.

`` Explanation of symbols for main parts of drawings ''

1: electric toothbrush, 10 handle, 12 switch,

20: toothbrush head, 21: pin fixture, 22: protrusion,

23: center pin, 25, 27: cooling hole, 30: brush head holder,

32: brush head, 33: center pin hole, 34: slot,

35: locking groove, 36: locking step, 37: lubrication tube,

38: rotating body, 40: rotating coupler, 41: main shaft,

42: drive shaft, 43: shaft bearing, 44: shaft fixture,

45: eccentric coupler, 46a: housing, 46b: lubrication band,

46c: rotary pipe, 47: drive pin, 48: connecting shaft,

49: drive head.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the present invention may be embodied in many different forms and should not be limited to the described embodiments. It should be noted that the embodiments of the present invention described below are intended to sufficiently convey the spirit of the present invention to those skilled in the art.

Figure 2 is a side view showing the bristle bristle holder, the toothbrush head and the rotary shaft coupler portion of the electric toothbrush according to a preferred embodiment of the present invention, Figure 3 is an exploded cross-sectional view of the components shown in Figure 2, Figure 4 is A perspective view of the bristle holder shown in Figure and a perspective view of the toothbrush head with a portion cut away. And Figure 5 is an exploded perspective view of the rotation center drive shaft according to a preferred embodiment of the present invention, Figure 6 is a perspective configuration diagram extracting the main portion of the electric toothbrush according to a preferred embodiment of the present invention.

As shown in FIGS. 2 to 4, the rotary shaft coupler 40 and the toothbrush head 20 according to the exemplary embodiment of the present invention are integrally molded to be coupled to or separated from the handle 1 of FIG. 1.

The rotary shaft coupler 40 has a cylindrical or conical shape, and transmits the rotational force of the motor in the handle 10 shown in FIG. 1 to the driving pin 47 eccentrically installed at a remote end with respect to the central axis of rotation. The drive shaft 42 is inserted.

The pin fixing tool 21 and the locking protrusion 22 are formed in each of the center of the inner bottom surface and one side wall of the toothbrush head 20, respectively. The pin fixing part 21 is formed is a portion protruding upward, the pin pin 21 is fixed to the center pin 23 of the predetermined thickness is inserted in the interference fit form. At this time, the material of the center pin 23 is preferably used a metal such as stainless steel is less friction coefficient and oxidation is not good. The locking protrusion 22 is formed in an arc shape and has an appropriate horizontal length.

On the other hand, the bristles 32 are planted in the upper surface of the bristle holder 30 is coupled to the toothbrush head 20 and the center pin hole of a predetermined size in the center and one side of the rotating body 38 protruding from the rear surface ( 33) and engaging grooves 35 having an arc shape are formed. On the opposite side of the rotating body 38 in which the locking groove 35 is formed, a slot 34 in which the driving pin 47 of the driving shaft 42 is inserted is formed, and a cylinder is formed inside the center pin hole 33. Lubrication tube 37 is inserted. At this time, it is preferable that the lubrication tube 37 is made of stainless steel, which has a low coefficient of friction and is not easily oxidized.

The brush head holder 30 configured as described above is assembled to the toothbrush head 20 in which the center pin 23 is inserted and fixed as shown in FIG. 2. That is, in the state in which the center pin 23 is inserted into the pin fixture 21 of the toothbrush head 20 in the form of interference fit, the lubrication fitted to the locking step 36 and the center pin hole 33 of the bristle holder 30 is fixed. The hole of the tube 37 is inserted into the lower portion of the locking projection 22 of the toothbrush head 20 and the center pin 23, respectively, and the brush head holder 30 is coupled to the toothbrush head 20.

When the brush head holder 30 is assembled to the toothbrush head 20 as shown in FIG. 2, the locking groove 35 formed on one side of the rotating body 38 of the toothbrush holder 30 has an arc shape as shown in FIG. 5. Therefore, the bristle holder 30 is able to rotate horizontally and stably. In addition, the center pin 23 of the toothbrush head 20 is inserted into the shaft hole of the lubrication tube 37 inserted into the center pin hole 33 of the bristle holder 30 to smoothly rotate the bristle holder 20. can do.

In this way, in the state in which the toothbrush head holder 30 is coupled to the toothbrush head 20, the drive shaft 42 configured as shown in FIG. 5 is fitted inside the rotary shaft coupler 40 of FIG. 2 to be eccentric with respect to the rotation center axis of the motor. The drive pin 47 is assembled to be located in the slot 34 of the bristle holder 30.

At this time, the drive shaft 42 has a main shaft 41 is coupled to one side to the rotating shaft of the motor located in the handle 10 as shown in FIG. The shaft fixing tool 44 formed on the other side of the main shaft 41 is coupled to the connecting shaft 48 of the eccentric coupler 45 through the shaft bearing 43 so as to maintain the state of the rotation center axis of the motor. The other side of the eccentric coupler 45 is coupled to the drive pin 47 eccentric with respect to the rotation center axis of the motor, the end of the drive pin 27 is larger than the diameter of the drive pin 27 A rounded drive head 49 is formed.

The shaft bearing 43 is a radial bearing type, a rotary pipe 46c bored so that the connecting shaft 48 of the eccentric coupler 45 is inserted into the lubrication band 46b made of silicon. ) Is embedded and the outside is surrounded by a housing 46a made of stainless steel. At this time, the housing 46a should be manufactured in an appropriate size to be in close contact with the inner diameter of the rotary shaft coupler 40 as shown in FIG.

Briefly describing the operation of the electric toothbrush 1 according to the embodiment of the present invention configured as described above are as follows.

The rotary shaft coupler 40 integrally formed with the toothbrush head 20 configured as shown in FIG. 2 is coupled to the handle 10 shown in FIG. 1, and then the switch 12 is pressed, and the motor installed inside the handle 10. Is rotated. When the motor is rotated, the eccentric coupler 45 connected through the main shaft 41 and the shaft bearing 43 coupled in the same state as the rotation center axis of the motor is also rotated.

The driving pin 47 coupled to the other side of the eccentric coupler 45 is located in the slot 34 of the bristle holder 30 in an eccentric state with respect to the center axis of the motor. Accordingly, when the motor is rotated, the drive head 49 of the drive pin 47 located at the remote end of the drive shaft 42 eccentrically on the center axis of the motor rotates the slot 34 of the brush head holder 30 left and right. By rotating the bristle holder 30 to the left and right.

At this time, the lubrication tube 37 fitted into the center pin hole 33 of the bristle holder 30 is coupled to the center pin 23 of the toothbrush head 20, and the locking groove 35 of the bristle holder 30 is provided. Since the engaging projection 22 of the toothbrush head 20 is fitted and coupled, the bristle holder 30 is rotated horizontally and stably.

Meanwhile, the cooling holes 25 and 27 formed in the toothbrush head 20 supply water provided from the outside to the coupling portion of the bristle holder 30 when brushing the drive pins 47 and the brush head holder 30 and At the same time as the lubrication role of the coupling portion of the center pin (23) to allow cooling. When the toothbrush is rinsed in the water after the brushing is finished, since the clean water is easily introduced into the toothbrush head 20 through the cooling holes 25 and 27, the internal cleaning is smoothly performed.

As described above, the electric toothbrush according to the present invention combines the coupling between the bristle holder and the toothbrush head by the center pin of the metal material and the lubrication tube to rotate the toothbrush holder so that the rotation of the bristle holder becomes more efficient, thereby increasing the effect of brushing. You can. In addition, by installing a shaft bearing between the drive shaft and the eccentric defect coupling to achieve a smooth rotation of the drive shaft is an effective design to increase the efficiency of the rotational force transmission of the electric toothbrush.

Claims (2)

In the structure of the electric toothbrush consisting of a handle having a switch for selectively supplying a power supply voltage to the motor to control the rotation of the motor, a rotary shaft coupler formed integrally with the toothbrush head, and a bristle holder in which the bristles are implanted; A drive shaft inserted into the rotary shaft coupler to transmit the rotation of the motor to a drive pin of a remote end eccentric with respect to a central axis; A toothbrush head having a center pin inserted and fixed to a pin fixture formed at a center thereof, and having a locking protrusion formed at one inner surface thereof, and integrally formed with the rotation shaft coupler; A lubrication tube is inserted into a center pin hole formed at a bottom surface, and a locking groove and a slot are formed at a side thereof so that the center pin is inserted into the lubrication valve, and the locking protrusion and the driving pin are respectively located at the locking groove and the slot. The structure of the electric toothbrush, characterized in that consisting of a bristle holder coupled to the toothbrush head to be fitted. According to claim 1, wherein the drive shaft, the main shaft coupled to the rotation axis of the central axis of the motor; A shaft bearing including a rotating pipe having a central shaft hole, a lubricating band surrounding the rotating pipe, and a housing surrounding the lubricating band, the shaft bearing being fixed to the inner diameter of the rotating shaft coupler; The structure of the electric toothbrush, characterized in that the connecting shaft having the same central axis as the central axis of the main shaft is connected to the aircraft rotation axis through the shaft bearing and has an eccentric coupler having a driving pin eccentric with respect to the central axis.