JPH0211853Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an electric toothbrush device in which the motion of the brush can be switched between rolling, scrubbing, and circular motion.

[Background Art] Conventionally, this type of electric toothbrush uses a single device for rolling (rotary motion), another device for scrubbing (horizontal motion), and another device for circular motion, each of which performs a single motion. There was nothing I could do. For example, Utility Model Publication No. 56-10179 discloses an electric toothbrush that provides a combined motion of rocking motion and reciprocating motion, and Utility Model Publication No. 58-53087 also discloses an electric toothbrush that provides a combined motion of rocking motion and reciprocating motion. It was hot.

[Purpose of invention] Various methods of brushing teeth have been devised, but none of the methods devised by humans are perfect.
Each has advantages and disadvantages. Therefore, it is not a good idea to accept only one method at face value and stick to it, or to focus only on the shortcomings of some methods and neglect their strengths.

The usage can be roughly divided into 1) Method using toothbrush bristles, horizontal method (horizontal brushing), vertical method (vertical brushing)
There are 2) methods such as the Fones method (circular drawing method), 2) methods using the sides of the toothbrush bristles, and the rolling method.

1. The method of using the bristles of a toothbrush has an extremely high polishing effect on tooth surfaces, and is therefore highly efficient in removing plaque. However, if you use a hard toothbrush to brush your teeth forcefully, especially when using the bristle method, there is a risk of abrasion of the tooth structure, such as wedge-shaped defects, or gingival recession.

2. The method of using the flanks of the toothbrush's bristles does not damage the gums, and the effect of gingival pine surge is much higher than that of the bristles method, making it suitable for the prevention and treatment of periodontal disease. However, the plaque removal effect and polishing effect are low.

When this hair tip method is used in combination with the flank method, the drawbacks of both can be suppressed and the advantages of each can be highlighted.

This invention was made in view of the above circumstances, and the purpose is to provide an electric toothbrush device that enables three types of movements: rolling, scrubbing, and circular motion in one device. .

[Structure of the invention] The electric toothbrush device of this invention includes a brush drive shaft that is rotatably and axially movably provided on an appropriate frame, and that engages with the brush drive shaft to oscillate the brush drive shaft. a rolling gear having an eccentric shaft that causes the swinging lever to swing in the rotational direction; and a rolling gear that has a chevron-shaped cam shape, and that causes the brush drive shaft to reciprocate in the axial direction by rotation. a scrubbing cam that gives rotational force to the scrubbing cam, a scrubbing switching gear that transmits rotational force to the scrubbing cam, a driving gear means rotationally driven by a motor, and a rolling gear and a scrubbing switching gear that can be selectively separated from each other by the driving gear means. It is characterized by comprising a switching means for engaging.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

Motor installed in electric toothbrush body A (not shown)
A motor gear 2 is fixed to a motor shaft 1 .
Concentric intermediate gears 3 of different sizes and diameters are the support plate 1 of the main body A.
It is rotatably supported by a support shaft 20 installed at X. A scrubbing switching lever 4 is attached to the support shaft 21.
is rotatably mounted, and a chevron-shaped scrubbing cam 6 is provided on top of this switching lever 4, and this scrubbing cam 6 is integrated with a gear 6a. A scrubbing switching gear 5 is installed on the scrubbing switching lever 4 so as to mesh with the scrubbing cam gear 6a.

Two protrusions 7a are provided on the scrubbing cam receiver 7 so as to slidably contact the peaks and valleys of the scrubbing cam 6. The cam receiver 7 is vertically movable and rotatably attached to a support shaft 22 provided on the upper frame 30, and is always pressed downward by a spring 8 so as to always be in external contact with the cam 6. Therefore, when the scrubbing cam 6 rotates, the cam receiver 7 moves up while sliding on the slope of the mountain, and when it rotates 90 degrees, it gradually moves down, moving the support shaft 22 up and down, and this A toothbrush 40 attached to a support shaft 22 is reciprocated in the axial direction. Support shaft 23 erected on support plate 1X
A rolling switching lever 11 is rotatably mounted on the lever 11, a rolling switching gear 12 is provided on the lever 11, a rotatable rolling gear 13 is mounted on a support shaft 23, and the rolling switching gear 12 and A rolling gear 13 is installed so as to mesh with it.

The rolling switching lever 11 is installed at a height where the rolling switching lever 11 meshes with the intermediate gear 3. A rolling shaft 14 is eccentrically provided on the upper surface of the rolling gear 13.

A swinging lever 15 is engaged with the upper part of the support shaft 22 so as to engage with the rolling shaft 14, and an elongated hole 15 is formed inside the lever 15.
A long hole 15X is formed, and the rolling shaft 14 engages with this long hole 15X. rolling shaft 1
4 swings the swinging lever 15 left and right by the amount of eccentricity as the rolling gear 13 rotates.

FIG. 2 shows an overall schematic diagram of the toothbrush shown in FIG.

The toothbrush main body A includes a handle portion A1, a housing portion A2 housing the drive mechanism shown in FIG. 1, and a shaft 22.
The toothbrush 40 is detachably attached to the toothbrush 40. The switching levers 4 and 11 protrude to the outside and can be operated from the outside.

Next, the operation of the above embodiment will be explained.
The first operation moves the scrubbing switching lever 4 to the left and engages the scrubbing switching gear 5 with the upper part of the intermediate gear 3. When the rotation of the motor is transmitted to the motor gear 2 of the motor shaft 1, the rotation is decelerated by the intermediate gear 3 and transmitted from the scrubbing switching gear 5 to the scrubbing cam 6, causing the protrusion of the scrubbing cam receiver 7 to move up and down. In other words, the rotation of the motor shaft is converted into vertical reciprocating motion and transmitted.
The toothbrush 40 reciprocates in the axial direction with a predetermined stroke.

Next, in the second operation, the scrubbing switching gear 5 is disengaged from the intermediate gear 3, the rolling switching lever 11 is moved, and the rolling switching gear 12 is brought into meshing engagement with the intermediate gear 3.

When the rotation of the motor shaft 1 is transmitted to the motor gear 2, the rotation is transferred from the intermediate gear 3 to the rolling switching gear 1.
2, the signal is decelerated and transmitted to the rolling gear 13.

Since the support shaft 22 is located outside the rotation of the rolling shaft 14, the rolling shaft 14 engages with the long hole of the swing lever 15, and the swing lever 15 rotates at a constant angle in the forward and reverse directions. repeat,
That is, the rotation of the motor is transmitted to the rolling gear 13, converted into a reciprocating rotational motion, and the toothbrush 40 is rolled, that is, reciprocated at a predetermined angle in the circumferential direction.

Note that the scrubbing switching lever 4, switching gear 5, rolling switching lever 11, and rolling switching gear 12 are arranged as shown in FIG.
This lever may be displaced by operating the switch 50. Figure 3A shows the gear at full stop, Figure 3B shows rolling, Figure 3C shows scrubbing, and Figure 3D shows the gear during rolling and scrubbing.

The switch 50 consists of a fixed plate 51 and a movable plate 52. The legs 53 of the movable plate 52 are fitted into the long holes 54 of the fixed plate, and the grooves 55 are engaged with the U-shaped protrusions 56 of the fixed plate 51. levers 4 and 11.
The distal end portion of the groove 55 is slidably fitted into the groove 55. With this configuration, when the movable plate 52 is moved upward in the figure in FIG. 4, the movable plate 52 is displaced to the right along line 56, resulting in a rolling state. 52 is displaced to the left,
The levers 4 and 11 can be respectively switched to the scrubbing state.

[Effects of the invention] This invention integrates three effective tooth-brushing movements into one device: scrubbing up and down movement, rolling rotation movement, and circular drawing movement, and combines the advantages of each tooth-brushing method. The effects of brightening, plaque removal, polishing effects, and gingival pine surge can be achieved with a simple configuration, and the toothbrush can be moved up and down, rotated,
The structure is simple as a means for imparting circular motion. Therefore, it is possible to provide an electric toothbrush device that achieves the above-mentioned movement at a lower cost and with fewer parts than ever before.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the essential parts of an embodiment of this invention, Fig. 2 is a partial cross-sectional view showing the external appearance of a toothbrush device of this invention, and Figs. 3 A to D are other embodiments of this invention. FIGS. 4 and 5 are diagrams showing an example of a switch used in the embodiment of FIG. 3. 1...Motor shaft, 4...Scrubbing switching lever, 5...Scrubbing switching gear, 6...Scrubbing cam, 11...Rolling switching lever, 1
2... Rolling switching gear, 13... Rolling gear, 14... Rolling shaft, 15... Rocking lever, 22... Support shaft, 40... Toothbrush.

Claims (1)

[Scope of utility model registration request] A brush drive shaft rotatably and axially movable provided on an appropriate frame, a swing lever that engages with the brush drive shaft to swing the brush drive shaft, and a swing lever that rotates when rotated. a rolling gear having an eccentric shaft that provides directional swing;
A scrubbing cam that has a chevron-shaped cam shape and provides axial reciprocating motion to the brush drive shaft through rotation, a scrubbing switching gear that transmits rotational force to the scrubbing cam, and a drive gear that is rotationally driven by a motor. and switching means for selectively and removably engaging the rolling gear and the scrubbing switching gear with the drive gear means.