JPS6155963B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in electric toothbrushes.

There are three types of movement methods for the brush 14 of a conventional electric toothbrush: oscillating movement (Fig. 1a), elliptical movement (Fig. 1b), and oscillating + reciprocating movement (Fig. 1c). However, in both methods, the bristles of the brush 14 are brushed by applying them to the teeth, but the teeth cannot be cleaned unless the bristles of the brush 14 rub the teeth with appropriate pressure. If this is insufficient, the cleaning effect will be poor. In addition, it is necessary to press the button all the time, which makes the hands tired. Furthermore, since the bristles themselves of the brush 14 do not vibrate, there are drawbacks such as insufficient cleaning of small areas and a low pine surge effect on the gums. Furthermore, the brush body 13 of a conventional electric toothbrush
Although three types of motion have been shown, in addition to rocking motion, there is also vertical motion, and there is also rocking motion + vertical motion or vibration motion. FIG. 2 shows the case of rocking motion, but in the case of rocking motion, the motion stops at point X and point Y, which are the return points of rocking, so no work is done. Further, even in the case of vertical movement, there is a problem in that a dead center where no work can be done occurs at the turning point.

The present invention has been made in view of the drawbacks of the conventional examples, and its purpose is to sufficiently clean every detail of the teeth by simply applying a brush to the teeth, and to have a pine surge effect on the gums. There is a high price to offer in electric toothbrushes.

The present invention will be described in detail below with reference to illustrated embodiments.
The grip part A has a cylindrical shape with a bottom, a lid B is fitted on the bottom part, a battery 19 is built in the lower part, and a motor 1 covered with anti-vibration rubber is built in the upper part. A switch 18 for opening and closing the motor 1 is arranged on the outer periphery. The motor output shaft 2 protrudes in the opening direction of the gripping part A (upward in the figure), and a drive gear 3 is inserted and fixed at the base of the motor output shaft 2, and the drive gear 3 is inserted and fixed to the base of the motor output shaft 2, and the drive gear 3 is transmitted to the tip and can freely rotate the bar 5. It is inserted into. The motor output shaft 2 is located on the bottom side of the transmission lever 5.
A long sliding groove 20 is formed in the radial direction around
1 protrudes, and the lower end of the rocking spring 7 is fitted therein. Further, a support shaft 16 is provided upright below the sliding long groove 20, and the transmission gear 4 is rotatably and slidably inserted onto a return spring 17 inserted into the support shaft 16. An eccentric pin 22 protruding from the upper surface is slidably disposed in the long sliding groove 20, and the transmission gear 4 is meshed with the drive gear 3. Further, an engagement groove 23 is recessed in the entire circumference of the body of the transmission gear 4, and is exposed on the outer circumferential surface of the gripping part A, and is a switching gear that reciprocates in the longitudinal direction of the gripping part A. The handle 15 is engaged with the engagement groove 23. The transmission gear 4, the transmission lever 5, the swinging spring 7, and the like constitute a conversion device that converts the rotational motion of the motor 1 into a swinging motion. Reference numeral 9 designates a brush mount, and a bearing 10 is disposed within the upper cylinder portion of the upper opening, and the upper end of the swinging spring 7 is fitted into the driven side protrusion 25 inside the lower opening. Further, 8 is a waterproof cover having excellent flexibility, and its lower end is fitted onto the outer periphery of the upper end of the grip portion A, and its upper end is fitted onto the lower outer periphery of the brush mount 9. Further, a rotating shaft 12 is attached to the bearing 10, and the rotating shaft 12 and a motor output shaft 21 are connected by a vibration spring 6, and an eccentric balancer 11 is attached to the tip of the rotating shaft 12. The vibration spring 6, the rotating shaft 12, the eccentric balance 11, and the like constitute a vibration device that applies vibration to the brush body 13. Reference numeral 13 denotes a brush body, which is open at the bottom, and this lower opening 24 is removably fitted onto the outer periphery of the upper part of the brush mount 9. The brush 14 is implanted on the side surface of the tip of the brush body 13. There is.

Next, the operating state of this electric toothbrush will be explained. When the switch 18 is turned on, the motor 1 rotates, and the motor output shaft 2 rotates the rotating shaft 12 via the vibration spring 6. Then, as the rotating shaft 12 rotates, the eccentric balancer 11 also rotates, generates vibrations, and transmits the vibrations to the brush 14 via the brush mount 9. On the other hand, motor output shaft 2
The drive gear 3 fitted on the support shaft 16 rotates the transmission gear 4 loosely fitted on the support shaft 16. Then transmission gear 4
The eccentric pin 22 protruding from the top surface of the support shaft 1
However, since the eccentric pin 22 is slidably fitted into the long swing groove 20, the transmission lever 5 rotates around the motor output shaft 2 and is equal to the rotation diameter of the eccentric pin 22. Oscillates with amplitude. This swinging motion of the transmission lever 5 is transmitted to the brush mount 9 via the swinging spring 7.
The brush body 13 swings. In this way, the rocking motion and vibration are simultaneously transmitted to the brush body 13,
You will be brushing every detail of your teeth. Next, the brush body 13
In the case where only the vibration movement is made, when the switching handle 15 is pulled toward the rear side of the grip part A against the return spring 17, the eccentric pin 22 of the transmission gear 4 is removed from the long sliding groove 20, and the transmission gear 4 is The transmission lever 5 will not be able to swing as it will just idle. However, since the motor output shaft 2 and the rotating shaft 12 are connected by the vibration spring 6, vibrations due to the eccentric balancer 11 still occur.
By applying the brush 14 to the gums or teeth, a gingival massage or tooth brushing can be performed. If the oscillating movement of the brush 14 is to be resumed, the switching bundle 15 is unlocked. Then, the transmission gear 4 slides toward the transmission lever 5 by the resilient force of the return spring 17, and the eccentric pin 22 is fitted into the long sliding groove 20 again. In this way, the switching handle 15
The brush 13 can be given vibrating motion and rocking motion, or can be switched to only vibrating motion, so it can be used as desired and is easy to use. In addition, since the brush mounting base 9 and the gripping part A are connected by the vibration and rocking springs 6 and 7, the vibration on the brush body 13 side is not transmitted to the gripping part A side, and the vibration during use is prevented. No discomfort.

As described above, the present invention includes a grip section that accommodates a motor, a brush body having a brush protruding to the side of the grip section, a motor that drives the brush body, and a rotational motion of the motor that is converted into a swinging motion. The brush body is equipped with a converting device that converts the rotational motion of the motor and a vibrating device that vibrates the brush body, and the brush body is connected via a swinging spring to a transmission lever that performs the swinging motion of the converting device that converts the rotational motion of the motor into a swinging motion. Since the vibration device is connected to the eccentric balancer and the vibration device that vibrates the brush body is connected to the output shaft of the motor via a vibration spring, the brush body can perform oscillating motion, vertical motion, or oscillating motion + Compared to the conventional method of vertical motion or vibration motion, especially in the case of rocking motion and vertical motion, work is not done at the turning point and a dead center occurs, making it impossible to brush the teeth at the turning point. However, by applying vibrational motion to the brush body, that is, by using a combination of rocking motion and vibration motion, the bristles of the brush vibrate even at the turning point of the rocking motion, resulting in a constant tooth-brushing effect. The amount of work involved in brushing the teeth is high, and the brush body brushes the teeth with an oscillating motion, and the bristles of the brush vibrate finely due to the vibrations, causing the tips of the bristles to reach every detail of the teeth. This has the effect of increasing tooth brushing ability. Furthermore, since the bristles of the brush vibrate, even if there are variations in the pressing force of the brush on the tooth surface, there will be no difference in the tooth brushing effect, and it is possible to perform uniform tooth brushing.
Moreover, since the bristles of the brush vibrate in this way, there is no need to press the brush strongly against the tooth surface, which is especially useful for infants, the elderly, or sick people who do not have strong hands, so that their hands do not get tired and can be used for long periods of time. It can withstand many uses and is easy to use. In addition, as mentioned above, since the brush transmits rocking motion and vibration motion, it is effective not only for cleaning the details of the oral cavity and shortening the cleaning time, but also for gingival pine surge and preventing alveolar pyorrhea. It has effects suitable for prevention and maintaining healthy gums. Furthermore, in order to give the brush body rocking motion or vibration motion,
Since this is done via the swinging spring and the vibration spring, the swinging motion and vibrational motion of the brush body is not transmitted to the gripping part, and the effect is that there is no discomfort during use due to the swinging motion or vibrational motion. It is something to play.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the state of movement of a conventional brush, FIG. 2 is an explanatory diagram of the conventional example of oscillating motion,
FIG. 3 is a cutaway side view of one embodiment of the present invention. A is the gripping part, 1 is the motor, 5 is the transmission lever, 6
is a vibration spring, 7 is a rocking spring, 1
1 is an eccentric balancer, 13 is a brush body, and 14 is a brush.

Claims (1)

[Scope of Claims] 1. A gripping part that accommodates a motor, a brush body having a brush protruding to the side of the gripping part, a motor that drives the brush body, and converting the rotational motion of the motor into a swinging motion. The brush body is connected via a swinging spring to a transmission lever that performs the swinging motion of the converting device that converts the rotational motion of the motor into swinging motion. An electric toothbrush characterized in that the vibrating device that vibrates the brush body is constituted by an eccentric balancer connected to the output shaft of the motor via a vibrating spring. 2. The electric toothbrush according to claim 1, wherein the circumferential rocking motion of the brush body is turned on and off by a switching handle provided on the grip.