JPS6179410A - Electromotive toothbrush - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field 1] The present invention relates to an electric toothbrush that reciprocates electrically.

[Background Art 1] There are two types of electric toothbrushes: one in which the toothbrush is reciprocated in its axial direction, and one in which the toothbrush is oscillated around its axis. However, in the latter case, although it is possible to brush the tooth surface, there is a problem in that the space between the teeth and gums is difficult, where plaque tends to accumulate, and the gums are easily damaged. If you reduce the length of the stroke, it will be easier to brush the gap between your teeth and gums and will not damage the gums, but if you brush the tooth surface, it will not feel refreshing. Although there is a refreshing feeling when brushing, it is easy to damage the gums when brushing between the teeth and gums. It was something that could not be done.

[Objective of the Invention 1 The present invention has been made in view of the above points, and its purpose is to effectively brush the space between the teeth and gums and the tooth surface. There is also an electric toothbrush that does not damage the gums (and also provides a refreshing feeling when brushing the tooth surfaces).

[Disclosure 1 of the Invention] The present invention provides a drive means for reciprocating a toothbrush in its axial direction, a drive means for causing the south brush to reciprocate with a large stroke, and a drive means for causing the toothbrush to reciprocate with a small stroke. This toothbrush has two features: the reciprocating movement of the toothbrush and the toothbrush 2 can be changed depending on where the toothbrush is to be brushed.

Here, in causing the toothbrush to perform a reciprocating motion with a large stroke and a small stroke, a driving means for causing the toothbrush to perform a reciprocating motion with a large stroke;
It is possible to provide two systems of drive means, one for making the toothbrush reciprocate with a small stroke, and to make the toothbrush detachable from each drive means, as well as to make the reciprocating stroke variable. By using the driving means, that is, the driving means for causing the toothbrush to reciprocate with a large stroke and the driving means for causing the toothbrush to reciprocate with a small stroke may be the same. And the n long stroke to polish the tooth surface is approximately 101. The preferred small stroke for brushing between the teeth and gums is about 5IoIo. (for brushing tooth surfaces)
(7-ri is 10m + m) smaller, the brushing effect will be less and the refreshing feeling of toothbrushing will be less.
If it is larger than +a, the neck, which is normally covered by the gums, will be exposed, and the tooth neck, which is made of cementum softer than enamel, will be scraped with a toothpick and you will feel the pain of what is called a wedge-shaped defect. This can lead to serious situations. When brushing between teeth and gums, if the stroke is smaller than 5mm, the movement will be absorbed by the bristles of the toothbrush, and there will be almost no movement at the tips of the bristles.
If you make it bigger, it will be easier to damage your gums. Furthermore, when brushing the tooth surface and the space between the tooth and the stem,
The reciprocating motion of the large toothbrush or toothbrush 2 that brushes the tooth surface should be such that its tip draws an ellipse, and the reciprocating motion of the small stroke of the r-temple that brushes between the teeth and gums should be a reciprocating linear motion. is preferred. Also, if the period of reciprocating motion of the small stroke is longer than the period of reciprocating motion of the dog stroke, the difference in the speed at which the toothbrush moves becomes larger, and the gap between the tooth surface and the teeth and gums becomes larger. It becomes more suitable for polishing each.

The present invention will be described in detail below based on the illustrated embodiments.
6 to 6 show one embodiment, and in this embodiment, two systems of driving means are housed in the main body 1. That is, in the center of the interior of the main body 1, which houses the battery 2 at the bottom and the motor 3 above the battery 2, are a seven-wheel gear 5 supported by a shaft 6, an eccentric cam integrated with the seven-wheel gear 75, ↓ are housed, and two drive rods 31 and 32 are housed in the upper part of the main body 1. The face gear 5 meshes with the gear 50 attached to the output shaft of the motor 3, and the eccentric cam 4 rotates around the shaft 6.
It is composed of two circular eccentric cams 41 and 42 with different eccentricities, and a ring at the lower end of one drive IF 51 is loosely fitted around the circumference of the eccentric cam 41 with a large eccentricity, A drive rod 32 is attached to the outer periphery of the eccentric cam 42 with a small eccentricity.
+The ring part of the connecting rod 33 connected by the two-end force pin 34 is loosely fitted.

The driving rod 32 is guided by the upper inner circumferential surface of the main body 1 and is slidable in its axial direction, and passes through a hole 35 at the bottom of the WJArIIJ rod 32 so that its upper end is located inside the driving rod 32. The drive rod 31 has a ring 1 protruding from the inner surface of the main body 1.
The circular ring passes through 3. Therefore, motor 3
When the eccentric cam 4 is rotated by 1) Since it is on the side of the pongee 6, it performs a reciprocating motion that causes the tip to draw an elliptical orbit swinging in a direction perpendicular to the plane of the drawing. In addition, the driving rod 32
Since the eccentricity of the eccentric cam 42 that reciprocates is smaller than the eccentricity of the eccentric cam 41 that reciprocates the drive rod 31, the stroke of the reciprocation of the drive rod 32 is smaller than the stroke of the reciprocation of the drive rod 31. , is smaller. Furthermore, waterproof rubber 1 is provided between the outer periphery of the driving rod 31 and the inner periphery of the driving rod 32, and between the driving rod 32 and the inner periphery of the main body 1.
5.14 is attached to prevent water from entering inside the main body 1.

On the other hand, the toothbrushes include a toothbrush 21 connected to the tip of a drive rod 31 and a toothbrush 2 connected to the tip of a drive rod 32.
Two types of toothbrushes, 21 and 22, are available, and when brushing teeth, one of the toothbrushes 21 and 22 is attached and used. When brushing the south side, the toothbrush 21 is connected to the drive rod 31 as shown in FIG. 2, and the switch 10 is turned on.

At this time, the toothbrush 21 reciprocates with a stroke of about 10 mm while its tip draws an elliptical orbit, giving the toothbrush 21 a movement suitable for brushing the tooth surface. If you want to brush between your teeth and gums, just connect the toothbrush 22 to the drive rod 32 and turn on the switch 1().The toothbrush 221 performs a reciprocating linear motion with a stroke of 5I. Also, at this time, since the toothbrush 22 opens the normally closed switch 11 provided at the tip of the drive rod 32, the resistor R provided on the printed circuit board 19 connected to the switch 11 via the lead wire 13 Then, the rotational speed of the motor 3 decreases, and the reciprocating period of the toothbrush 22 becomes longer than the reciprocating period of the toothbrush 21. In other words, the speed of movement of the toothbrush 22 and the speed of the toothbrush 21 are more different than when the cycles are the same and only the strokes are different, and the teeth are cleaned by slowly performing reciprocating linear movements with small strokes. I will refine it.

An embodiment of the pond is shown in Fig. 7 and below. Although this embodiment has only one system of drive means built-in, the drive means here is used for reciprocating motion when converting rotational motion into reciprocating linear motion. It has a variable stroke, and includes a drive rod 30 and an eccentric pin 4 that engages with the drive rod 30.
3. It is composed of a face gear 5 that holds the eccentric bin 43, a bell crank 37 that changes the amount of eccentricity of the eccentric bin 43 from the rotation center of the face gear 5, and the like. The face gear 5, which receives the rotation of the motor 3 via the gear 50 and the key 751, has a hollow interior, and the central portion is supported by a pin 39 in this hollow part, and the bell crank 37 and the bell crank 37 are connected to each other. In contact with one end of the crank 37, a button 17 that protrudes from the main body 1, and springs 57 and 58 that push these 11 forces are housed.
! ! The end opening 7A is also connected to an eccentric pin t3 that protrudes from the window 5 on the end face of the gear 5 and whose tip engages the drive rod 30. The main body 1 is held slidably in the axial direction by the upper end of the main body 1 and a groove 16 formed inside the main body 1.
2. The drive rod 30, to which the waterproof rubber 16 is attached between the main body 1 and the upper end, is provided with a groove 36 perpendicular to its axial direction. Since the eccentric pin 13 rotates together with the face gear 5, the drive rod 3 ( ) to which the single-tip toothbrush 20 is attached performs reciprocating linear motion. When the button 17 is pushed in, the eccentric bin 43 moves in a direction that reduces its eccentricity via the bell crank 37, and at this time the reciprocating stroke of the drive rod 30 becomes smaller.

[Effect of the invention 1 As described above, in the present invention, the stroke of the τI brush can be made larger and smaller, and the stroke is used to remove plaque between the teeth and gums. The history of the stroke can be differentiated depending on the area being brushed, such as a small reciprocating motion with a small stroke, and a reciprocating motion with a large stroke when brushing the south side. It allows you to brush effectively, does not damage the gums, and provides a refreshing feeling when brushing the tooth surface.

4. Drawing 11! i! iL explanation Figure 1 is a sectional view of one embodiment of the present invention, Figure 2 is a partial sectional view of the same as above, Figure @3 is a sectional view taken along line A-A in Figure 1, Figure PJ4 is a circuit diagram of the same as above, Figures 5 and 6 are perspective views of the driving means as above, Figure 7 is a sectional view of the embodiment of the pond, Figure 8 is a partial horizontal sectional view of the same as above, and Figure 9 is a partial front view of the driving rod as above. figure,
Fig. 10 is a perspective view of the above eccentric pin and a mechanism for changing the amount of leakage of the eccentric pin, Fig. 11 is a perspective view of the 7 ace gear shown above, and No. 12l6) (b) is a perspective view of the same drive means as above. Side view,
FIG. 13 is a perspective view of the same motor, 7 ace gears, and 4.
2L22 is an eccentric cam, 2t), 2L22 is a toothbrush, 3(1+
31+32 indicates the drive rod, and ↓3 indicates the eccentric pin.

Agent f + Burial stone 1) Choshichi wi1 diagram s2 diagram Three reasons

Claims (6)

[Claims] (1) The drive means for reciprocating the toothbrush in its axial direction is composed of a drive means for causing the toothbrush to reciprocate with a large stroke and a drive means for causing the toothbrush to reciprocate with a small stroke. electric toothbrush. (2) Two systems of drive means are provided, one that causes the toothbrush to reciprocate with large strokes, and the other that causes the toothbrush to reciprocate with small strokes, and the toothbrush can be attached to and detached from each of the drive means. An electric toothbrush according to claim 1, characterized in that: (3) The driving means for causing the toothbrush to reciprocate with a large stroke and the driving means for causing the toothbrush to reciprocate with a small stroke are the same means, and this driving means has a variable reciprocating stroke applied to the toothbrush. An electric toothbrush according to claim 1, characterized in that: (4) The electric toothbrush according to claim 1, wherein the reciprocating motion of the toothbrush with a large stroke is such that the tip thereof draws an ellipse, and the reciprocating motion of the toothbrush with a small stroke is a reciprocating linear motion. (5) The electric toothbrush according to claim 1, wherein the large stroke is approximately 10 mm, and the small stroke is approximately 5 mm. (6) The electric toothbrush according to claim 1, wherein the cycle of the reciprocating motion of the small stroke is longer than the cycle of the reciprocating motion of the large stroke.