JP4830076B2 - Ultrasonic toothbrush - Google Patents

Description

The present invention is an ultrasonic toothbrush, in particular, relates to an ultrasonic toothbrush toothbrush body with built-in electronic ultrasonic vibrator is reciprocated by Oite power drive to the tip of the shaft which projects from the distal end surface of the grip portion Is.

  Traditionally, keeping your teeth clean has been known to prevent tooth decay and periodontal disease, and it has been known that it is particularly effective to remove plaque on your teeth. An ultrasonic toothbrush is used as a means for dropping.

As this ultrasonic toothbrush, for example, the part that the toothbrush part reaches is removed by mechanical vibration, and the narrow part that the toothbrush part does not reach is equipped with means for removing by ultrasonic vibration generated by the ultrasonic vibrator built in the toothbrush part. It is presented in Japanese Patent Application Laid-Open No. 2003-61986.

  However, when the ultrasonic toothbrush using the conventional mechanical vibration and the ultrasonic vibrator is used together, the reciprocating motion performed by the shaft body to which the toothbrush portion is fixed and the transmission circuit and the ultrasonic wave are arranged. It will be continuously applied to the electrical wiring that connects to the vibrating body, and repeated stress will act on the electrical wiring lead-out part and circuit board connection part, which may cause a problem of disconnection at these parts. .

  Therefore, the reciprocating motion performed by the shaft body to which the toothbrush portion is fixed is prevented from being applied to the electrical wiring connecting the transmitting circuit and the ultrasonic vibrator disposed through the shaft body, thereby preventing the electrical wiring from being disconnected. An ultrasonic toothbrush is presented in Japanese Patent Application Laid-Open No. 2005-102837.

  This ultrasonic toothbrush designed to prevent disconnection of the electrical wiring is fixed by connecting the ultrasonic signal supply to the ultrasonic vibrating body that generates ultrasonic vibration to the ultrasonic transmission circuit that generates this ultrasonic signal. The first coil and the second coil connected to the ultrasonic vibrator and movable to the first coil are electromagnetically coupled to each other.

  However, the ultrasonic toothbrush that prevents sliding of the conventional electric wiring is fixed in a fixed coil (first coil) as shown in the embodiment for carrying out the disclosure described in the publication. A bobbin for winding having a substantially square hole and a plurality of copper wires coated with insulation are wound around it. A bobbin hole of a fixed coil and a movable coil are arranged on a central column that forms an approximately square pole of an E-shaped core After being inserted through the bobbin hole, the E-core is fitted into the cross member of the core and bonded and fixed, and the movable coil (second coil) is wound so as to reciprocate with respect to the center column of the E-core The wire bobbin is provided with a substantially rectangular hole, and a plurality of copper wires or the like coated with insulation are wound around the hole.

  For this reason, the structures of the first coil and the second coil are special and the structure is complicated, so that there is a problem that the price of the parts is increased and the assembly process is not easy and the manufacturing cost is high.

JP 2003-61986 JP 2005-102837 A

  The present invention has been made to solve the above-described problems, and uses both mechanical reciprocation and vibration by an electronic vibrator to vibrate the toothbrush portion and disconnect the electrical wiring. Therefore, an ultrasonic toothbrush can be provided at low cost.

In order to solve the above-mentioned problems, an ultrasonic toothbrush according to the present invention projects a brush portion having an ultrasonic vibrator at the tip thereof so as to reciprocate in the front-rear direction from an opening formed at the tip of a hollow portion formed in the gripping body. causes disposed was placed through the hollow portion of the ultrasonic vibrator and the hollow portion formed in said brush section gripped and placed in the body and an ultrasonic oscillation circuit communication with each other and the gripper which is disposed in the brush part supply In an ultrasonic toothbrush in which a first coil connected to an ultrasonic transmission circuit connected via an electric wire and connected to an ultrasonic transmission circuit in which the supply electric wires are not in contact with each other is electromagnetically coupled to a second coil connected to the ultrasonic vibrator The first coil is formed by a cylindrical air-core coil fixed to the gripping body, and the second coil is arranged coaxially within the first coil and movably in the axial direction. Characterized in that it is a cylindrical choke coils.

  Moreover, in the said means, it is good to use a piezoelectric element as an ultrasonic vibration body with which the toothbrush part was equipped.

  According to the present invention, the first coil connected to the ultrasonic transmission circuit in which the ultrasonic vibrator arranged in the brush portion and the ultrasonic transmission circuit arranged in the grip body are in contact with each other is fixed to the grip body. Since the second coil is a cylindrical choke coil that is formed by a cylindrical air-core coil and is arranged coaxially in the first coil and movably in the axial direction, the first coil Both the second coil and the second coil are simple in construction, inexpensive and easy to assemble. Particularly, the second coil which is a choke coil can be used as it is, which is very economical.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIGS. 1 and 2 show an example of the best mode for carrying out the present invention. An ultrasonic toothbrush 1 is made of a hard synthetic resin material into a hollow, substantially elongated cylindrical shape by means such as injection molding. The formed gripping body 2 and the brush portion 3 that protrudes from the opening 21 formed at the tip of the gripping body 2 so as to reciprocate in the front-rear direction are provided.

Then, a number the brush part 3 which is formed in an elongated cylindrical shape with a hollow portion 2 2 by, for example, stainless steel or hard synthetic resin material having an opening 31 at the rear end, stocked with hair in a certain direction to the tip portion of the brush body 4 which the brush 41 planted consisting of tufts is formed, the ultrasonic vibrator 3 4 the fixed part 33 of the brush body 4 is a piezo vibrating element is arranged.

Further, the hollow portion 3 2 of the gripper 2 proximal end of the brush part 3 is connected, for example, Japanese 2003-61986 and JP conventionally known motor being presented such as in JP-A-2005-102837 A reciprocating mechanism 5 that reciprocates in the front-rear direction using the rotational movement of the brush is disposed, and the brush portion is moved in the front-rear direction (axial direction), for example, at a stroke of about 1 to 3 mm, for example, 1,000 to 20,000 times / Gives reciprocation in minutes.

Moreover, with ultrasound emitting circuit 6 for generating an ultrasonic signal for vibrating the ultrasonic vibrator 3 4 disposed in the brush body 4 is disposed in the hollow portion 3 2 of the gripper 2, the hollow portion 2 second hollow portions 3 2 and the brush portion 3 of the grip body 2 to communicate with each other for transmitting an ultrasonic signal from the ultrasonic transmitter circuit 6, transmission means 7 by electromagnetic coupling is arranged .

The transmission means 7, the ultrasonic transmitter circuit ultrasonic transmitter circuit and no-contact with each other disposed through 6 the hollow portion 31 formed in the brush section (3) for the communication with each other and a hollow portion 3 2 of the gripper 2 wherein the first coil 8 connected to 6 are connected via the ultrasonic vibrator 3 supply wires 10 to 4 and a second coil 9 connected to the interposed transmission means 7 by electromagnetic coupling.

More specifically, the first coil 8 is formed of a cylindrical air-core coil fixed to the gripping body 2 and connected to the ultrasonic transmission circuit 6 via the input lead wire 11. is formed by two commercially available cylindrical choke coil coil 9 is fixed through said output lead 12 is connected to the ultrasonic vibrator 3 4 to the brush unit 3, coaxially within said first coil 8 And movably in the axial direction.

In the present embodiment having the above-described configuration, the reciprocating mechanism 5 is driven via a battery power supply and a switch (not shown) accommodated and disposed in the gripping body 2 as in the conventional ultrasonic toothbrush of this type. the brush section 3 is reciprocated in the front-rear direction together provide mechanical vibration in the axial direction, by sending a generation signal generated by the ultrasonic wave transmission circuit 6 to the ultrasonic vibrator 3 4 arranged on the brush unit 3 given It is intended to remove plaque and prevent periodontal disease bacteria by ultrasonic vibration.

At this time, in the present embodiment, the ultrasonic vibrator 3 4 , the output lead wire 12 and the second coil 9 reciprocate in the front-rear direction integrally according to the brush part 3 reciprocating in the front-rear direction. 9 constitutes the first coil 8 and the electromagnetic coupling means 7, that is, the second coil 9 fixed to the holding body 2 and the first coil 8 fixed to the brush part 3 are in contact with each other. Therefore, the reciprocating motion of the second coil 9 is not transmitted to the first coil 8, and the output lead wire 12 is output by the reciprocating mechanism 5 even if the input lead wire 11 and the output lead wire 12 reciprocate. There is no problem like this conventional ultrasonic vibration toothbrush in which the lead wire 12 reciprocates and is disconnected due to metal fatigue.

  In particular, in the embodiment of the present invention, the second coil 9 is formed of an air-core coil, and a commercially available choke coil can be used as the first coil 8, so that the price of parts can be kept low, and the entire toothbrush Can also be inexpensive.

  Further, since the transmission means 7 electromagnetically coupled by simply inserting the first coil 8 into the second coil 9 is completed, the assembly is easy and suitable for mass production.

Furthermore, since the resistance as an output coil for operating the ultrasonic vibrator 3 4 provided in the brush section 3 (secondary coil) is used choke coil having an increased small inductance may ultrasonic vibrator 3 4 Efficiency It can be vibrated reliably and can also save power.

The longitudinal cross-section fragmentary figure which shows preferable embodiment about this invention. FIG. 2 shows an electromagnetic coupling portion for the embodiment shown in FIG. 1, wherein (a) shows a state before assembling the first coil and the second coil, and (b) shows an assembled state.

DESCRIPTION OF SYMBOLS 1 Ultrasonic toothbrush, 2 Grasping body, 3 Brush part, 5 Reciprocating mechanism, 6 Ultrasonic transmission circuit, 7 Transmission means, 8 First coil, 9 Second coil, 10 Hand transmission means, 21 Opening, 2
Second hollow portions, 31 opening, 32 the hollow portion, 3 4 ultrasonic vibrator

Claims (2)

A brush portion having an ultrasonic vibrating body at the tip is disposed so as to protrude from an opening formed at the tip of a hollow body formed in the gripping body so as to be able to reciprocate in the front-rear direction. The ultrasonic transmission circuit arranged in the grasping body is connected via a supply wire arranged through the hollow portion formed in the brush portion communicating with each other and the hollow portion of the grasping body, and the supply wires are not in contact with each other In an ultrasonic toothbrush in which a first coil connected to an ultrasonic transmission circuit and a second coil connected to the ultrasonic vibrator are electromagnetically coupled, a cylindrical shape in which the first coil is fixed to a gripping body The super choke coil is formed of an air-core coil and the second coil is a cylindrical choke coil arranged coaxially within the first coil and movably in the axial direction. Wave toothbrush.   The ultrasonic toothbrush according to claim 1, wherein the ultrasonic vibrator is a piazo ceramic.

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