JP3046482B2 - Scaler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaler and, more particularly, to a structure of a scaler for vibrating a scaler tip for removing tartar at a high speed by using high-pressure air as a power source in dental treatment.

[0002]

2. Description of the Related Art In dental treatment, a scaler that vibrates a tip at a high speed while pressing a tip for a scalar against a main part in order to remove tartar adhered to a side surface or a root of a tooth is used. Conventionally, as a scaler, a method using an electromagnetic force as a driving source or a method using an ultrasonic wave as a driving source has been used.

As an electromagnetic scaler using an electromagnetic force as a drive source, for example, one end of a rod-shaped vibrator is fixed in a cylindrical holder, a chip is mounted on this end, and the other end is a free end. There is a structure in which a high-frequency coil driven by a high-frequency power supply is arranged on the outer peripheral side of the rod-shaped vibrator. When the high-frequency power is applied to the high-frequency coil, the rod-shaped vibrator expands and contracts due to the dicole effect. ,
When the frequency of expansion and contraction at this time becomes equal to the natural frequency of the rod-shaped vibrator, the largest amplitude is obtained and the chip is vibrated efficiently.

As an ultrasonic scaler, for example, an ultrasonic generating member in which a large number of disk-shaped piezoelectric elements polarized in the thickness direction are coaxially stacked and integrated is housed in a cylindrical holder. An adapter is attached to one end of the ultrasonic generating member, and a chip is attached to the other end of the adapter. The chip is vibrated by piezoelectric strain generated when a high-frequency power is applied to the ultrasonic generating member. It is based on the principle.

[0005]

Since the above-mentioned conventional electromagnetic and ultrasonic scalers both require a high-frequency power supply, the electromagnetic field generated by the high-frequency power supply may adversely affect the pacemaker. There is a possibility that a problem may occur particularly when the device is used for a patient with a built-in pacemaker.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and forms an intermittent air jet using high-pressure air, which is easily obtained, as a power source, and injects the jet into a piston having a scaler tip. It is an object of the present invention to provide a safer scaler that uses a pressure and a spring that resists the injection pressure to reciprocate the piston at high speed without using electromagnetic force, and that has a simple structure, is inexpensive, and has a simple structure. Things.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides: (1) a cylinder, a piston disposed in the cylinder, and fixed to one side of the piston;
A scaler tip projecting and extending from the cylinder;
A spring member disposed on the side where the scaler chip is fixed to suppress the movement of the piston; and a nozzle for injecting high-pressure air to the piston on the other side of the piston, or (2) a cylinder, a gripper connected to one side of the cylinder and having a hollow passage having a diameter smaller than the inner diameter of the cylinder, and a scaler inserted into the cylinder and protruding to the outside of the cylinder on one side. A piston having a tip and having a pressure receiving portion on the other side, a spring for pressing the piston toward the grip portion, and a high pressure air pipe having a nozzle for injecting high pressure air toward the pressure receiving portion of the piston. (3) In the above (1) or (2), the surface of the piston from which the high-pressure air is injected is formed in a truncated conical recess, and the truncated conical recess is formed in the recess. The nozzle head is arranged to face, furthermore, it is characterized in (4) the high pressure air from the nozzle is intermittently injected.

[0008]

A cylinder through which a piston is inserted is provided in the handpiece in the axial direction, a scaler chip is mounted on one surface of the piston, and a concave pressure receiving portion is provided on the other surface. The intermittent high-pressure air is jetted toward the pressure receiving portion. A spring force opposing the injection pressure is acting on the piston, and the intermittent high-pressure air is ejected to the piston to efficiently reciprocate the piston at a high speed to drive the scaler tip.

[0009]

FIG. 1 is a view for explaining an embodiment of a scaler according to the present invention. In the figure, 1 is a handpiece, 2 is a cylinder, 3 is a gripper, 4 is a screw, 5 is a cylinder chamber, 6 is a through hole, 7 is a hollow path, 8 is a support plate, 9 is a piston, 10 is a piston shaft, 11 is a joint, 12 is a chip, 13 is a pressure receiving part, 14 is a ring bearing, 15 is a spring, and 16 is high pressure. Air pipe, 17 is a nozzle, 18 is a flexible tube, 1
9 is a valve device and 20 is a controller.

The handpiece 1 comprises a cylinder 2 and a gripping part 3, and the cylinder 2 and the gripping part 3 are screwed together with screws 4. The cylinder 2 has a through hole 6 having a diameter smaller than the inner diameter of the cylinder chamber 5 penetrating from the cylinder chamber 5 to the outside.
Penetrates in the axial direction.

A piston 9 is disposed in the cylinder chamber 5,
A piston shaft 10 fixed to one surface of the piston 9 projects outside through the through hole 6 as a guide hole.
A tip 12 for the scaler joined at the joint 11 is joined to the leading end of the zero.

The other surface of the piston 9 has a frusto-conical pressure receiving recess 13, and the pressure receiving recess 13 is a nozzle 17 having a frusto-conical head disposed at the tip of a high-pressure air pipe 16.
And is facing. The high-pressure air pipe 16 is supported by a plurality of support plates 8 that are long in the axial direction in a hollow passage 7 that is bored coaxially with the rear portion 3 of the handpiece 1, and the hollow passage 7 is open to the atmosphere on the support plate 8 side. ing. Since the inner diameter of the hollow path 7 is smaller than the outer diameter of the piston 9, the end face of the hollow path 7 serves as a stopper for the piston 9.

The piston 9 is disposed in the cylinder 2 so that the outer peripheral surface thereof is slidable in the cylinder chamber 5 in the axial direction of the piston shaft 10. It is pressed by a spring 15 such as a helical spring, for example, and the surface on the pressure receiving portion 13 side is always in the hollow path 7.
Is closed. A bearing 14 made of a wear-resistant material is embedded in an inner wall portion of the cylinder chamber 5 in which the piston 9 actually moves.

An end of the high-pressure air pipe 16 opposite to the nozzle 17 protrudes outside from the rear part 3, and a flexible tube 18 is fitted into the protruded end. A high-pressure air source is connected to the other end of the flexible tube 18, and a valve device 19 is connected in the middle thereof. The valve device 19 is electromagnetically opened and closed by a controller 20, and an intermittent air pressure is supplied to the high-pressure air pipe 16.

FIG. 2 is an enlarged view of an essential part for explaining the operation of the scaler shown in FIG. 1. As described above, the valve device 19 is driven by the controller 20 and the high-pressure air is supplied into the high-pressure air pipe 16. Is introduced in the direction of the arrow (+ Q), the piston 9 moves in the direction of the arrow (−) against the spring force of the spring 15.
The high-pressure air is displaced by being pushed in the direction F), travels along the hollow path 7 in the direction of the arrow (-Q), and is released to the atmosphere. The piston 9 has inertia, and the piston 9 moves in the direction of the arrow (-F) beyond the axis Y-Y line, which is the equilibrium position of the force of the injection of the high-pressure air and the force of the spring 15. Is stopped, the piston 9 returns to the direction of the arrow (+ F) by the spring force of the spring 15 in the direction of the arrow (+ F).

The piston 9 repeats the above operation and reciprocates in the direction of the arrow (± F). When the frequency of the intermittent high-pressure air becomes equal to the resonance frequency of the spring constant of the spring 15 and the weight of the piston 9 including the tip 12, the tip 12 can be effectively driven with a large amplitude. In the above description, the intermittent high-pressure air is injected from the nozzle 17 toward the pressure receiving portion 13 of the piston 9. However, even if the valve device 19 and the controller 20 are removed and high-pressure air of a constant pressure is injected from the nozzle 17, Piston 9 is spring 1
Since the micro vibration is obtained by finding the equilibrium point between the spring force of 5 and the injection pressure, it is also possible to vibrate the chip 12 using this micro vibration.

[0017]

As is clear from the above description, according to the present invention, since no electromagnetic force is used, it can be used with confidence even for patients with a built-in pacemaker. The scalar tip can be vibrated by a simple structure in which the piston having the scaling tip attached thereto is inserted into the cylinder to face the nozzle.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an embodiment of a scaler according to the present invention.

FIG. 2 is an enlarged sectional view of a main part for describing an operation of the scaler shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Handpiece, 2 ... Cylinder, 3 ... Grasping part, 4 ... Screw, 5 ... Cylinder chamber, 6 ... Through-hole, 7 ... Hollow path, 8 ... Support plate, 9 ... Piston, 10 ... Piston shaft, 11 ... Joining Department,
12: tip, 13: pressure receiving part, 14: ring bearing, 15
... Spring, 16 ... High pressure air pipe, 17 ... Nozzle, 18 ...
Flexible tube, 19: valve device, 20: controller.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A61C 1/00-1/18 A61C 3/02

Claims (4)

(57) [Claims] 1. A cylinder, a piston disposed in the cylinder, a scaler tip fixed to one side of the piston and protruding from the cylinder and extending, and the scaler tip is fixed. A scaler comprising: a spring member disposed on a side of the piston to suppress movement of the piston; and a nozzle on the other side of the piston for injecting high-pressure air to the piston. 2. A cylinder, a grip portion connected to one side of the cylinder and having a hollow passage having a diameter smaller than the inner diameter of the cylinder, and inserted into the cylinder and protruding to the outside of the cylinder on one side. A piston having a scaler tip and having a pressure receiving portion on the other side, a spring pressing the piston toward the grip portion, and a high pressure air pipe having a nozzle for injecting high pressure air toward the pressure receiving portion of the piston. A scaler comprising: 3. The surface of the piston from which the high-pressure air is injected is formed in a truncated conical recess, and a truncated cone-shaped nozzle head is disposed facing the recess. The scaler according to claim 1 or 2, wherein 4. The scaler according to claim 1, wherein high-pressure air is intermittently injected from the nozzle.