JPS60884Y2 - Switch mechanism of handpiece for ultrasonic tartar removal - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a handpiece for ultrasonic tartar removal, and in particular, a switch mechanism for driving an ultrasonic vibrator is provided in the handpiece to improve operability. be.

a vibrator for ultrasonically vibrating a tartar removal chip;
An ultrasonic tartar removal handpiece that includes a permanent magnet for applying a bias magnetic field to the vibrator and a high-frequency coil that excites the vibrator has already been proposed.

However, conventional ultrasonic tartar removal handpieces have poor operability because they use a foot switch as a switch mechanism for applying an excitation voltage to a high-frequency coil.

This invention was made in view of the above-mentioned circumstances.
In particular, a switch mechanism for applying an excitation voltage to the high-frequency coil is installed in the handpiece so that it can be operated with fingers to improve operability, and a reed switch is used as the switch mechanism at that time. The structure is simplified by using a permanent magnet for bias magnetic field to perform on/off control, and the cost is reduced.

Fig. 1 is a sectional side view of the essential parts of the handpiece for removing tartar according to the present invention, and Fig. 2 is an electric circuit diagram. 3a is a permanent magnet case, 4 is a rear bias permanent magnet, 5 is a high frequency coil, 6 is a reed switch, 7 is a handshake case, 8 is an O ring, and 9 is a control circuit section, as is well known. An excitation voltage is applied to the high frequency coil 5 to cause the vibrator 2 and the chip 1 to vibrate ultrasonically, thereby removing tartar.

Therefore, in the present invention, the reed switch 6 is incorporated into the handshake case 7, and the bias permanent magnet 3 is also incorporated into the handshake case 7.
is attached so as to be movable in the direction of the arrow, and the reed switch 6 is controlled on/off by bringing the bias permanent magnet 3 closer to the reed switch 6 (see the position indicated by the chain line in the figure) or by moving it away from the reed switch 6. , thereby turning on and off the current flowing through the high-frequency coil 5 and controlling the excitation of the vibrator 2.

In this way, according to the present invention, the excitation of the vibrator can be controlled by finger movements in the handpiece, so operability is significantly improved compared to the conventional foot switch that is operated by foot. In addition, since the reed switch is controlled on and off using a bias permanent magnet, it can be configured easily and inexpensively without increasing the number of components. There are advantages.

[Brief explanation of drawings]

FIG. 1 is a sectional side view of a main part of a hand piece for removing tartar, and FIG. 2 is an electric circuit diagram thereof. 1... Chip for tartar removal, 2... Curved ultrasonic vibrator, 3, 4... Permanent magnet, 5... Curved high frequency coil, 6... Reed switch, 7...Handshake case, 8...01Jng, 9...
control circuit.

Claims (1)

[Scope of utility model registration request] 9 vibrators for ultrasonic vibration of the tartar removal chip,
A permanent magnet for applying a bias magnetic field to the vibrator, a high frequency coil for exciting the vibrator, a reed switch for applying an excitation voltage to the high frequency coil, the vibrator, the permanent magnet, and the high frequency coil. and a handshake case holding a reed switch; the permanent magnet is movably attached to the handshake case, and the reed switch is turned on and off by movement of the permanent magnet. Switch mechanism of handpiece for removing tartar.