JP2001198142A - Power-assisted forceps for extracting tooth for dentistry - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate tooth extraction by an aged or female dentist. SOLUTION: This power-assisted forceps 10 for extracting a tooth comprises a hand piece 12 including an air force type actuator 14. The hand piece 12 is connected to a dental hose 16 from a dental unit, and as the actuator 14 is actuated by compressed air supplied from the dental hose 16, a piston 40 is moved to close jaw members 22 of the forceps for strongly grasping a tooth. The need for grasping force to the tooth by an operator is thus eliminated, and tooth extraction can be achieved with a smaller force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental extraction forceps having a power assist mechanism.
The present invention also relates to a power assist device for tooth extraction forceps.

[0002]

2. Description of the Related Art In dental procedures, tooth extraction is performed using forceps for extraction. In order to perform tooth extraction using the forceps for tooth extraction, (1) an operation of strongly grasping and tightening a lever of the forceps for tooth extraction in order to grip a tooth firmly with a jaw member of the forceps, and (2)
It is necessary to simultaneously perform two types of operations, namely, an operation of applying a pulling force to the extraction forceps in order to extract the teeth.

[0003]

Since both of these two types of operations require a strong force, the elderly and female dentists have a very difficult time extracting teeth. Therefore,
An object of the present invention is to provide a power-assisted tooth extraction forceps that can partially compensate the force required for tooth extraction by power, thereby enabling a practitioner to easily perform tooth extraction. . Also, today, various tooth extraction forceps having various designs of tooth gripping jaw members are commercially available,
The dentist can select and use extraction forceps with a design that matches the tooth to be extracted. Therefore, in another aspect, an object of the present invention is to allow a user to freely replace an existing extraction forceps of any design, and to supplement a part of the force applied by the practitioner to the extraction forceps with power. It is an object of the present invention to provide a power assist device capable of performing the above.

[0004]

The power-assist type tooth extraction forceps of the present invention comprises a handpiece main body connectable to a dental hose, a pneumatic actuator (air cylinder device) built in the handpiece main body. A pair of jaw members which are attached to the handpiece body so as to be openable and closable and driven to be opened and closed by the actuator.

[0005] The power assist type tooth extraction forceps of the present invention comprises:
It uses compressed air from an air compressor permanently installed in a dental clinic as a power source. In use, the power assisted tooth extraction forceps is connected to a dental hose extending from the dental unit. When the actuator is operated using compressed air supplied from the dental unit as a power source, the jaw member tightens the teeth by the force of the compressed air. Since the teeth are gripped by the force of the compressed air in this way, the practitioner does not need to spend any force to grip the teeth. Therefore, the practitioner can put full force into the tooth extraction operation, and can perform tooth extraction more easily.

[0006] In another aspect of the present invention, the invention provides:
Provided is a power assist device for existing forceps for tooth extraction, which device includes a handpiece body connectable to a dental hose, and a pneumatic actuator built in the handpiece body. . The handpiece main body supports one lever of the dental extraction forceps, and the actuator is configured to act on the other lever of the tooth extraction forceps.

[0007] The practitioner selects any existing extraction forceps having a jaw of a design suitable for the tooth to be extracted, engages one lever of the forceps with the handpiece body, and moves the other lever to the actuator. To be engaged. When the actuator is actuated by supplying compressed air, the lever of the extraction forceps is tightened and grips the tooth. Therefore, it becomes possible for the practitioner to concentrate on extracting the teeth. The practitioner can replace the extraction forceps according to the size and shape of the tooth to be extracted.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, a power assist type tooth extraction forceps 10 according to the present invention has a handpiece main body 12 that can be grasped by a practitioner's hand. The handpiece body 12 incorporates a pneumatic actuator (air cylinder device) 14. In order to supply compressed air to the pneumatic actuator 14, at the rear of the handpiece body 12 is a conventional coupling for connecting the handpiece body 12 to a dental hose 16 extending from a dental unit (not shown). A part 18 is provided.

At the front of the handpiece body 12 is a forceps mechanism 20 operated by a pneumatic actuator 14.
Is provided. The forceps mechanism 20 includes a pair of jaw members 22 for gripping teeth, and these jaw members 22 are pivotally attached to a pair of support portions 24 protruding forward from the handpiece body 12 by pins 26 so as to be opened and closed. Have been. A lever 28 is formed integrally with each jaw member 22 and is opened and closed by the pneumatic actuator 14 via a connecting rod 30. To this end, the connecting rod 30 is connected on one side to the lever 28 by a pin 32 and on the other side to the output 36 of the pneumatic actuator 14 by a pin 34.

Referring to FIG. 2, the pneumatic actuator 14 has a cylinder bore 38 formed in the handpiece body 12. The cylinder bore 38 is provided with a first working chamber 42 by a double-acting piston 40 slidably fitted therein.
And a second working chamber 44. These working chambers 4
2 and 44 are connected by air passages 48 and 50 which are switched by a manually operated switching valve 46.
Is connected alternatively to the compressed air inlet 52.

Referring to FIG. 3, the switching valve 46 includes a spool-type movable valve body 56 fitted in a valve hole 54 formed in the handpiece body 12 and a movable valve body 56 for operating the movable valve body 56. It has a push button 58. The movable valve body 56 is urged by a return spring 60 toward a rest position (FIG. 3A) where the movable valve body 56 contacts the stopper screw 62. As shown in FIG. 3, the movable valve body 56 has internal passages 64 and 6.
6 is formed, and an annular passage 68 is formed on the outer periphery thereof.
And a longitudinal groove 70 serving as an exhaust passage is formed. The internal passage 64 is configured such that the air passage 72 from the compressed air inlet 52 is connected to the first air passage 48 when the movable valve body 56 is at the rest position shown in FIG.

Next, the power assist type tooth extraction forceps 1
In order to explain the mode of operation and use of No. 0, in use, the dental hose 16 from the dental unit is connected to the joint 18 (see FIG. 2), and compressed air is supplied from the air compressor of the dental unit. The supply of compressed air is controlled by a foot switch (not shown) attached to the dental unit. When grasping the teeth for tooth extraction, the practitioner need only turn on the foot switch without operating the switching valve 46. At this time, the switching valve 4
6 is in the rest position shown in FIG.

When the foot switch is turned on, the compressed air inlet 52 of the handpiece body 12 is opened from the dental hose 16.
Compressed air that has entered the air passage 72, the switching valve 46
2 is introduced into the first working chamber 42 through the internal passage 64 of the movable valve body 56 and the first passage 48, and the piston 40 is
At the right. As the piston 40 moves to the right, the volume of the second working chamber 44 decreases, but the air in the second working chamber 44 receives the second air passage 50 and the internal passage 6 of the movable valve body 56.
6, and exhausted to the outside through the exhaust groove 70.

As the piston 40 moves to the right, the jaw member 22 is closed by the action of the connecting rod / lever, and the teeth are firmly gripped. Since the jaw member 22 is tightly closed by the action of the compressed air, the practitioner does not need to apply force to tighten the teeth. Therefore, the practitioner can apply full power to the original tooth extraction by pulling the handpiece body 12. Therefore, tooth extraction can be performed with a smaller force than in the case of using the conventional tooth extraction forceps.

When the tooth extraction is completed, the tightening of the jaw member 22 is released by pressing the push button 58 of the switching valve 46, and the teeth can be released. When the push button 58 is pressed, the movable valve body 56 of the switching valve 46 moves to the operating position shown in FIG. 3B, and the compressed air passes through the second air passage 50 and the second action of the pneumatic actuator 14. It is sent to the chamber 44. As a result, the piston 40 moves to the left as shown in FIG. 2B, and opens the jaw member 22.

FIGS. 4 and 5 show a power assist device of the present invention for assisting a force applied to a commercially available existing tooth extraction forceps. Referring to these figures, the power assist device 80 is a handpiece body 82 that can be gripped by hand.
Having. The handpiece body 82 has a pneumatic actuator 14 similar to that shown in FIGS.
The switching valve 46 and the joint 18 are incorporated. The handpiece body 82 has a mounting hole 8 penetrating the peripheral wall thereof.
6 is formed to receive one lever of a commercially available tooth extraction forceps 84 as shown in FIG.

At the front of the handpiece body 82, there is a mounting hole 88 for receiving the other lever of the forceps 84 for tooth extraction.
An operating rod 90 having an operating rod 90 is disposed, and the operating rod 90 is connected to the output section 36 of the actuator 14 by a pin 92. Mounting hole 8 of handpiece body 82
The lever of the extraction forceps 84 inserted into the
A slot 94 is formed in the center of the operation rod 90 to avoid interference with the operation rod 90.

Various tooth extraction forceps having different jaw member shapes are commercially available. At the time of tooth extraction, the practitioner connects the dental hose 16 to the joint portion 18 of the power assist device 80, selects the optimal forceps 84 for tooth extraction, and, as shown in FIG. The tooth extraction forceps 84 is mounted on the power assist device 80 by engaging the other lever with the mounting hole 88 of the operation rod 90 while engaging with the mounting hole 86 of 82.

The jaw member of the forceps 84 is applied to the tooth to be extracted, the foot switch is turned on, and the power assist device 8 is turned on.
When the compressed air is introduced into the first working chamber 42 of the actuator 14, the piston 40 and, consequently, the operating rod 90 move to the right in FIG. To grip. Therefore, the practitioner can perform tooth extraction by holding the forceps 84 in this state and applying a pulling force exclusively to the teeth.

After the tooth extraction, the push button 5 of the switching valve 46
When the piston 8 is pressed, the operation rod 90 is moved with the movement of the piston 40.
Extend from the handpiece body 82 and the teeth are released.

Although a specific embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications and changes can be made. For example, the jaw member 22 of the power-assisted tooth extraction forceps can be interchangeably mounted with a different design according to the shape of the tooth. Further, the power assist device of the present invention is not limited to the forceps for tooth extraction, and can be used to assist the operation of various pliers.

[0022]

According to the present invention, since the teeth are gripped by the force of the compressed air, the practitioner does not need to spend any force to grip the teeth. Therefore, it becomes possible for the practitioner to put his full force into the tooth extraction operation, and the elderly or female practitioner can more easily perform tooth extraction. The power assist type tooth extraction forceps and the power assist device of the present invention can be used by being connected to a dental hose with one touch, similarly to a dental turbine handpiece or the like.

[Brief description of the drawings]

FIG. 1A is a perspective view of a power assisted tooth extraction forceps of the present invention, and FIG. 1B is an exploded perspective view.

FIGS. 2A and 2B are axial sectional views of the power-assisted tooth extraction forceps shown in FIG. 1, wherein FIG. 2A shows an actuator in an operating position and FIG. 2B shows a rest position.

FIGS. 3A and 3B are cross-sectional views of the switching valve shown in FIG. 2, wherein FIG. 3A shows a state where a movable valve body is at a rest position, and FIG.

FIG. 4 is a perspective view of the power assist device of the present invention, showing a state where commercially available tooth extraction forceps are attached.

FIG. 5 is an axial sectional view of the power assist device shown in FIG. 4;

[Explanation of symbols]

 10: Power assist type tooth extraction forceps 12: Handpiece body 14: Pneumatic actuator 20: Forceps mechanism 22: Forceps jaw member 36: Actuator output unit 40: Actuator piston 46: Switching valve 80: Power assist device 90 : Operation rod

Claims (2)

[Claims] 1. A handpiece main body connectable to a dental hose, a pneumatic actuator built in the handpiece main body, and a pair of openable and closable drives mounted on the handpiece main body and driven to open and close by the actuator. A power assist type tooth extraction forceps, comprising: a tooth gripping jaw member; 2. A handpiece body connectable to a dental hose and adapted to support one lever of a dental extraction forceps, and a handpiece body incorporated in the handpiece body and the other lever of the dental extraction forceps. A power assist device for tooth extraction forceps, comprising: a pneumatic actuator adapted to act.