JPH0243214Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an electric toothbrush device, and in particular, an electric toothbrush device that allows the user to select between rolling motion, in which the toothbrush shaft is rotated, and scrubbing motion, in which it reciprocates in the axial direction. Regarding.

[Prior art and its problems] Conventionally, the movement of the toothbrush in this type of electric toothbrush device is generally a rolling movement in which the shaft of the toothbrush is rotated at a predetermined angle.
Depending on the area to be brushed or the arrangement of teeth, a scrubbing motion in which the toothbrush is moved back and forth in the axial direction may be effective. Therefore, it is desirable to have one device that can switch between the two motions, and various devices have been devised in the past. but,
According to the conventional mechanism, in order to obtain the above-mentioned rotation or reciprocating motion from the rotary motion of the motor, a complicated mechanism is required, and the self-weight becomes heavy or friction and noise are generated due to large transmission loss. This was impractical as it would shorten its lifespan.

[Purpose of the invention] This invention was made to eliminate the above-mentioned problems, and is an electric toothbrush device that can obtain stable rolling motion and scrubbing motion by minimizing the power transmission mechanism. The purpose is to provide

[Structure of the invention] In the electric toothbrush device of the invention, a pinion is fixed to the rotating shaft of a motor, and a spur gear that meshes with the pinion is supported in parallel to the rotating shaft direction of the motor by a support member that fixes the motor. At the same time, a face gear that meshes with the pinion is pivotally supported by the support member in a direction perpendicular to the rotational axis direction of the motor, and the eccentric pin of the spur gear is rotatable parallel to the rotational axis of the motor. engaging with a long groove provided in an arm formed at the other end of the pivotally supported first toothbrush drive shaft, and rotating the first toothbrush drive shaft at a predetermined angle;
The eccentric pin of the face gear is engaged with a long groove provided in a slider fixed to the other side of the second toothbrush drive shaft that is slidably inserted into the first toothbrush drive shaft, and the second toothbrush drive shaft is inserted into the shaft. When rotating the toothbrush, a toothbrush having a mounting portion that can be fitted to the end of the first toothbrush drive shaft is attached, while the toothbrush is rotated in the axial direction. When the toothbrush is moved back and forth, a toothbrush having a mounting portion that can be fitted to the end of the second toothbrush drive shaft is mounted.

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

FIG. 1 shows the appearance of the electric toothbrush device of the present invention. Reference numeral 1 denotes a cylindrical main body case made of synthetic resin, which is composed of three parts 1a, 1b, and 1c. 2 is a switch that turns the device on and off. 3 is a rolling shaft that rotates at a predetermined angle, and 4 is a scrubbing shaft that is inserted through the rolling shaft 3 and reciprocates in the axial direction. This rolling shaft 3
A rolling toothbrush or a scrubbing toothbrush is inserted into the end of the scrubbing shaft 4.

FIG. 2 shows the internal structure of the electric toothbrush device.

A power mechanism section, which will be described later, is housed inside the case 1a. A storage battery 6 is housed inside the case 1b, and a secondary side charging unit 7 for charging the storage battery is housed inside the case 1c.
It consists of a secondary coil 7b. 8 is a rectifying diode connected to the coil 7b.

Next, the power mechanism section will be explained.

Reference numeral 9 denotes a DC motor provided coaxially with the case 1a, and is inserted into a cylindrical motor housing 10 from one side 10a (right side in the figure) as shown in FIGS. fixed in place.
11 is a pinion for power transmission provided on the rotation shaft 9a of the motor 9. 12 is the pinion 11
A is the spur gear that meshes with the spur gear 12.
One side of the shaft A (the right end in the figure) protrudes from the pinion 11 by a predetermined length, and this protrusion extends from the other side surface 10b (left side in the figure) of the motor housing 10. It is pivotally supported using the bored part as a bearing B. spur gear 12
The center part of the shaft A on the other side protruding from the support member 13 is U-shaped and has a predetermined thickness and is joined to the left side surface 10b of the motor housing 10.
It is pivotally supported by a bearing C provided in the. A cam 14 equipped with an eccentric pin D is provided at the other end of the shaft A.

Reference numeral 15 denotes a face gear that meshes with the pinion 11 at a position opposite to the meshing portion of the spur gear 12, and is pivotally supported using a bored portion of the support member 13 as a bearing E. An eccentric pin F is provided on the surface of the face gear 15 opposite to the gear surface (the upper surface in the figure). Reference numeral 4 denotes the scrubbing shaft 4 described above, and one end (the right end in the figure) of the scrubbing shaft 4 is bored at a position opposite to the bearing B with respect to the rotating shaft 9 of the motor housing 10. It is slidably inserted into the insertion hole G. The other end of the shaft 4 (the left side in the figure) penetrates the case 1a and protrudes by a predetermined length.

Reference numeral 16 denotes a slider into which the scrubbing shaft 4 is inserted and which is fixed to the shaft 4. This slider 16 is provided with a long groove H having a predetermined length in a direction perpendicular to the axial direction of the shaft 4, and an eccentric pin F provided on the face gear 15 is engaged with this long groove H. . 3 is a rolling shaft in which a scrubbing shaft 14 is inserted, and this shaft 4 is slidable, and from one end (the right end in the figure) of this rolling shaft 3 is a predetermined length extending in the orthogonal direction. An arm 3a is formed. This arm 3a is provided with a long groove I extending in the arm direction, and an eccentric pin D provided on the cam 14 is engaged with this long groove I. The other side (left side in the figure) of the shaft 3 protrudes through the case 1a, and this protrusion length is slightly shorter than the protrusion length of the scrubbing shaft 4. The protruding portion is tapered so that the outer diameter becomes slightly smaller toward the tip, and a notch J is provided at the tip.

17 is an "O" provided for sealing at the penetration part of the case 1a of the rolling shaft 3
It's a ring. Reference numeral 18 denotes a U-shaped guide with a predetermined thickness that is further stacked on the support member 13 and is connected to the rolling shaft 3.
This prevents the arm 3a from moving to the left in the figure. 10c is the left side surface 1 of the motor housing 10
This guide extends from the inner surface of the guide 10c in the cylindrical direction of the case 1, and is designed to hold the sliding and rotating shaft 3 in sliding contact with the slider 16 and the rolling shaft 3. )
semicircular surfaces 10d and 10e are formed on each of the surfaces 10d and 10e. A stepped portion formed at the boundary between these surfaces 10d and 10e prevents the arm 3a of the rolling shaft 3 from moving in the right direction in the figure. The guide 10c is integrally molded with the motor housing 10, and 2 is a switch for turning the motor 9 on and off.

Reference numeral 30 indicates a toothbrush mounting portion that is mounted on the protruding portions of the scrubbing shaft 4 and the rolling shaft 3, and FIG. 2 shows a rolling toothbrush. The mounting part 30 of this rolling toothbrush is provided with a mounting hole 30a that can be fitted into the rolling shaft 3 and the notch J at the tip. The rolling toothbrush can be easily removed by applying a predetermined force to the mounting portion 30 in the opposite direction to that used when the rolling toothbrush is mounted. Also, this mounting hole 30
A hole 30a having a diameter slightly larger than the outer diameter of the scrubbing shaft 4 is provided at the bottom of the scrubbing shaft 4.
The scrubbing shaft 4 can move within this hole 30b without resistance.

FIG. 4 is a partial view showing the state when the scrubbing toothbrush is attached, and in this case,
The mounting hole 40a of the mounting portion 40 is similar to the mounting hole 30a.
It is slightly larger than the above, so that it can slide freely even when it comes into contact with the rolling shaft 4, and the bottom of this mounting hole 40a is fitted with the tip 4a of the scrubbing shaft 4. A hole 40b is provided, and the mounting part 40 is fixed to the scrubbing shaft 4 by fitting the tip 4a of the shaft 4 into the hole 40b. By applying a predetermined force in the direction, the scrubbing toothbrush can be easily removed.

Next, the operation of the apparatus having the above configuration will be explained.

When the switch 2 is turned on, the rotating shaft 9a of the motor 9 is rotated by the storage battery 6, and the spur gear 12 and face gear 15 are rotated via the pinion 11. The rotation of the spur gear 12 causes the cam 14 to rotate via the shaft A, and the eccentric pin D on the cam 14 makes a circular motion within the long groove I of the arm 3a of the rolling shaft 3. As a result, the arm 3a makes a swinging motion at a predetermined angle in a fan shape as the rotation axis of the scrubbing shaft 4, and the rolling shaft 3 also makes a rolling motion at a predetermined angle.

On the other hand, due to the rotation of the face gear 15, the eccentric pin F makes a circular motion on the face gear 15 within the long groove H provided in the slider 16 fixed to the scrubbing shaft 4. As a result, slider 1
6 and the scrubbing shaft 4 reciprocate in the axial direction to perform a scrubbing motion. As mentioned above, since the scrubbing shaft 4 and the rolling shaft 3 are slidable, their movements do not affect each other, and the scrubbing shaft 4 can perform a scrubbing motion. Also, the rolling shaft 3 is provided with a scrubbing motion.

Therefore, when the rolling toothbrush attachment part 30 is attached to the protruding parts of the scrubbing shaft 4 and the rolling shaft 3, the attachment part 30 is fixed by the tapered part of the rolling shaft 3, and the rolling toothbrush is It rotates at a predetermined angle in conjunction with the rolling movement of the shaft 3. At this time, the scrubbing shaft 4 merely reciprocates and does not exert any force on the rolling movement of the rolling toothbrush.

When the rolling toothbrush is removed and a scrubbing toothbrush is attached, the mounting portion 40 is fixed by fitting the tip 4a of the scrubbing shaft 4 into the hole 40b, and the scrubbing toothbrush is fixed. , reciprocates with the scrubbing movement of the scrubbing shaft 4. At this time, the rolling shaft 3
simply rotates and does not exert any force on the scrubbing movement of the scrubbing toothbrush.

In this way, by simply replacing your toothbrush,
A rolling motion and a scrubbing motion can be obtained in one device. Incidentally, since there is no means for switching between the rolling operation and the scrubbing operation, the movement of either the rolling shaft 3 or the scrubbing shaft 4 is wasted, but the power transmission mechanism of the device according to the present invention is simplified to the minimum. , so power loss can be ignored. Furthermore, by omitting the switching means, the device can be made more compact and the occurrence of failures can be reduced.

FIG. 5 is an electric circuit diagram of this device and a circuit diagram of a charging device used in this device.
is a primary side charging unit provided in a stand (not shown), and when the electric toothbrush device is placed in this stand, this primary side charging unit 50
The iron core 50a of the electric toothbrush device and the iron core 7a of the secondary side charging unit 7 in the electric toothbrush device are electromagnetically coupled, and the secondary voltage induced in the secondary coil 7b is passed through a rectifying diode 8. The storage battery 6 is charged via the storage battery 6. 50b is 1
The next coil is shown.

[Effects of the Invention] As described above, the electric toothbrush device according to the present invention allows the rolling motion or the scrubbing motion to be easily selected by replacing the toothbrush. Furthermore, since the power transmission mechanism of the device is simplified to the minimum, the device can be made smaller and lighter, and the occurrence of failures can be reduced.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the appearance of an embodiment of this invention, Figure 2 is a sectional view showing the internal structure of the device in Figure 1, and Figures 3a, b, and c are the motor housings in Figure 2. 4 is a partial sectional view when another toothbrush is attached, and FIG. 5 is an electric circuit diagram of this device and a circuit diagram of a charging device used in this device. 1...Body case, 2...Switch, 3...Rolling shaft, 3a...Arm, 4...Scrubbing shaft, 6...Storage battery, 7...2
Next side charging unit, 8... Diode, 9... Motor, 9a... Rotating shaft, 10... Motor housing, 10c... Guide, 11... Pinion, 12
... Spur gear, 13 ... Support member, 14 ... Cam, 15 ... Face gear, 16 ... Slider,
17...O-ring, 18...Guide, A...Shaft, B, C, E...Bearing, D, F...Eccentric pin, G...Through hole, H, I...Long groove, J...Notch Part, 30, 40... Mounting part, 30a, 40a...
Mounting hole, 30b, 40b...hole, 50...secondary side charging unit.

Claims (1)

[Scope of utility model registration request] A pinion is fixed to the rotating shaft of the motor, a spur gear that meshes with the pinion is pivotally supported in parallel to the rotating shaft direction of the motor by a supporting member that fixes the motor, and a face gear that meshes with the pinion is supported by the supporting member. The first toothbrush drive shaft is rotatably supported in a direction perpendicular to the rotation axis of the motor, and the eccentric pin of the spur gear is rotatably supported at the other end of the first toothbrush drive shaft. The first toothbrush drive shaft was engaged with a long groove provided in the formed arm to rotate the first toothbrush drive shaft at a predetermined angle, and the eccentric pin of the face gear was slidably inserted into the first toothbrush drive shaft. The first toothbrush is engaged with a long groove provided in a slider fixed to the other side of the second toothbrush drive shaft to cause the second toothbrush drive shaft to reciprocate in the axial direction, and when the toothbrush is rotated, the first toothbrush A toothbrush having a mounting part that can be fitted to the end of the drive shaft is mounted, and when the toothbrush is reciprocated in the axial direction, the second toothbrush can be fitted to the end of the drive shaft. An electric toothbrush device characterized in that a toothbrush having a mounting part that can be attached to the toothbrush can be attached to the toothbrush.