JPH07275260A - Dental hand piece with built-in lighting system - Google Patents

Abstract

PURPOSE:To save the trouble of confirming the presence of a light guide at the time of changing a body and prevent the degradation of a service life caused by the unnecessary lighting of a light source. CONSTITUTION:A light guide 10 is enclosed in a body 21, and connecting electrodes 24b, 24d are direct-coupled to each other. In the case of the body 21 having no light guide 10, the connecting electrodes 24b, 24d are not direct- coupled. A light source 13 is enclosed in a connector part 31, and connecting electrodes 25b, 25d are disposed therein. When the body part 21 is mounted to the connector part 31, the connecting electrodes 24b, 24d are inserted into the cylindrical connecting electrodes 25b, 25d so as to be electrically connected, and when a switch SW is closed, a light source 13 is lighted. On the other hand, when the body 21 without a light guide and with the connecting electrodes 24b, 24d not in the direct-coupled state is mounted to the connector part 31, the light source 13 is not lighted even when the switch SW is closed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental handpiece having an illumination device for illuminating a treatment area.

[0002]

2. Description of the Related Art Conventionally, in dental treatment, air turbine handpieces, micromotor handpieces, scalers, three-way, for cutting teeth, removing plaque, cleaning treatment areas, collecting cuttings and saliva, etc. Various handpieces for dental treatment such as syringes and vacuum syringes are used. When performing an oral treatment using such a handpiece, a shadowless lamp separately installed on a medical examination table or the like is turned on to illuminate the inside of the oral cavity to perform the treatment work.

However, depending on the posture of the patient, the site to be treated, and the working direction of the operator, the illumination in the oral cavity is insufficient, making it difficult to observe. Therefore, it is necessary to adjust the position of the operating light each time. This leads to a reduction in workability.

Therefore, in recent years, a handpiece has been developed and put into practical use in which a light guide is built into the body of the handpiece so that light is emitted from the tip of the handpiece to illuminate the treatment site. 60-58139,
Japanese Examined Patent Publication No. 5-56975, No. 3-13301.

On the other hand, the main body of the dental treatment handpiece,
A handpiece is generally used, which includes a connector portion to which a tube for feeding water, air, electric power, or the like from an external device or suctioning to the external device is connected, and the main body and the connector portion are configured to be detachable from each other. Therefore, maintenance such as cleaning and sterilization is simplified. Further, for example, when the handpiece is an ultrasonic scaler, tools having various shapes are attached to the main body. When it is desired to replace an appropriate tool according to the operator's treatment work, the tool is firmly fixed to the main body by screwing, and thus the replacement work is troublesome. Therefore, the tools may be exchanged by preparing a plurality of main bodies on which tools of various shapes are mounted and mounting the main bodies on which the desired tools are attached to the connector portion.

[0006] For example, in the case of the ultrasonic scaler as described above, a body without a light guide is widely used in the main body. In recent years, it has been desired to configure a connector portion to which a main body having a light guide, which has been used recently, to be connected, to be attached and detached.

In the case where the illuminating device for illuminating the oral cavity is built in the hand piece in which the main body and the connector part are detachable from each other, the connector part is used as a light source for illuminating the treatment site. A handpiece that is miniaturized by housing the light guide that stores the light from the light source or the light guide to the treatment site in the main body is being developed.

[0008]

However, in the conventional handpiece, the on / off control of the illumination light source housed in the connector portion or the tube base end portion is performed by an external light source driving device. Therefore, if you install the main body without a light guide and forget to turn off the external light source driving device, the light source housed in the connector will always be turned on, which will shorten the life of the light source by unnecessary lighting. ing. The light source incorporated in the handpiece is expensive because it is required to have a small size and a high performance capable of emitting light with high brightness.

Therefore, in order to avoid unnecessary lighting, the operator must operate the light source switch while checking the presence or absence of the light guide when exchanging the main body. It is complicated.

An object of the present invention is to provide a dental handpiece with a built-in lighting device, which saves the trouble of checking the presence or absence of a light guide when replacing the main body and can prevent the deterioration of the life due to unnecessary lighting of the light source. That is.

[0011]

According to the present invention, there is provided a main body of a dental treatment handpiece, and the main body is detachably mounted,
Further, in a dental handpiece with a built-in lighting device, which comprises a light source that generates light for illuminating a treatment site or a connector section that stores a light guide, a light guide that transmits light from the light source to the treatment site is stored. When the main body is attached to the connector section, the light source circuit for enabling the light source to be turned on is operated, and when the main body that does not house the light guide is attached to the connector section, the light source circuit It is a dental handpiece with a built-in lighting device, which is provided with a switch means for disabling operation.

[0012]

According to the present invention, the light source circuit can be operated when the main body accommodating the light guide is attached to the connector portion. Therefore, the light source can be arbitrarily turned on by controlling the power supply to the light source circuit. on the other hand,
If the main body without a light guide is attached to the connector, the light source circuit cannot operate. Therefore, even if the power supply to the light source circuit is mistakenly started, the light source is not turned on, so that deterioration of the life of the light source can be prevented.

[0013]

1 is a sectional view of a scaler 20 which is an embodiment of the present invention. An oscillator 22 that vibrates with ultrasonic waves is incorporated in the main body 21 of the scaler 20, and the oscillator 2 is provided so that the tool 4, which is a dental treatment tool, can be detached and replaced.
It is attached to the second drive unit. The vibration generated by the vibrator 22 is efficiently transmitted to the tip of the tool 4, and when the tool 4 is brought into contact with the dental plaque or tartar adhered to the tooth, the tartar or dental plaque can be quickly removed.

The main body 21 is attachable to and detachable from the connector portion 31 to which the tube 28 is connected, so that the main body 21 alone can perform sterilization processing, repair and replacement. Electric power for driving the vibrator 22 is supplied from an external device through the electric wire 23 and the connecting electrode 24 housed in the main body 21 side, the connecting electrode 25 and the electric wire 26 housed in the connector 27 on the connector section 31 side. Supplied.

Further, in order to jet a fluid such as water from around the tool 4 toward the affected area or to cool the vibrator 22,
A fluid conduit 30 is formed in the tube 28, and a connecting mechanism for the tube is provided for attachment / detachment of the main body 21 on the way.

The connector section 31 houses a light source 13 such as an incandescent light bulb, a halogen light bulb or a light emitting diode or a light guide guided by an external light source, and the light source 13 is supplied with electric power through an electric wire in the tube 28. Turns on or off by operating a switch on an external device. On the other hand, the main body 2
1, a light guide 10 including a plurality of optical fibers is built in so as to cover the periphery of the vibrator 22, and an incident end surface 11a of the light guide 10 is positioned so as to be in close contact with the light source 13. Further, the emission end face 12a of the light guide 10 is formed in an annular shape so as to surround the tool 4, and emits illumination light that is rotationally symmetrical with respect to the axis of the main body 21.

2A is a sectional view taken along the line A1-A1 in FIG. 1, and FIG. 2B is a sectional view taken along the line A2-A2 in FIG. In FIG. 2A, the connector portion 31
A fluid conduit 30 is arranged at the axis center of, and the light guides 10 which are bundled in a circular shape are arranged above the fluid conduit 30.
Further, five connection electrodes 24a to
24e are arranged, for example, connection electrodes 24a, 2
4e is connected to the vibrator 22, and the connection electrode 24c is used as a ground wire. Further, when the light guide 10 is housed in the main body 21, the connection electrodes 24b, 24d
Are directly connected to each other and form a circuit for identifying the presence of a light guide. When the light guide 10 is not housed in the main body 21, the connection electrodes 24b and 24d are not installed, and the absence of the light guide is identified.

In FIG. 2B, the fluid conduit 30 is arranged at the center of the connector 27 installed in the connector portion 31, and the light source 13 is arranged above the fluid conduit 30. Also, there are four or five electric wires 26 around the fluid conduit 30.
a to 26e are arranged.

3A and 3B are views showing the shape of the light guide 10 shown in FIG. 1. FIG. 3A is a plan view, FIG. 3B is a front view, and FIG. 3C is a left side view. 3 (d) is a right side view,
3E is a cross-sectional view taken along the line A1-A1 in FIG.
3F is a sectional view taken along line A2-A2 in FIG. 3B, and FIG.
FIG. 4 is a sectional view taken along line A3-A3 in FIG.

The light guide 10 has a shape in which a plurality of optical fibers are bundled, and one end thereof is bundled into one by a holder 11 to form a circular incident end face 11a. The other end has a pair of large and small cylindrical holders 12 as shown in FIG.
To form a ring-shaped emission end face 12a. The emission end face 12a is formed with an inclined surface that is inclined so as to be recessed from the peripheral portion toward the center, and the opening angle β is set to be smaller than 180 °, for example, β = 150 °. As described above, since the emitting end face 12a has the inclined surface which is inclined so as to be recessed from the peripheral portion toward the center, the illumination angle with respect to the central axis of the handpiece is increased, and the illumination region of the treatment site can be expanded. Also,
As shown in FIGS. 3 (a) and 3 (f), the intermediate portion of the light guide 10 has a shape branched into two in accordance with the outer shape of the vibrator 22 shown in FIG.

The light guide 10 is made of a rubber elastic material,
For example, it is impregnated or covered with silicone rubber or the like, which improves the strength of the optical fiber while maintaining flexibility. In particular, the scaler 20 is equipped with a vibrator 22, and in order to withstand this vibration, it is preferable to reinforce the optical fiber with a rubber elastic material.

The optical fiber is composed of glass fiber or the like, and it is preferable to use a heat-resistant and moisture-resistant adhesive or the above-mentioned coating agent, and the main body 21 is kept at high temperature and high humidity while the light guide 10 is mounted. It is possible to autoclave.

Returning to FIG. 1, the light emitted from the light source 13 enters from the incident end face 11a, passes through the light guide 10, and the rotationally symmetrical illumination light is emitted from the emitting end face 12a. In particular, the opening angle β = 150 ° on the exit end face 12a
Since the inclined surface is formed to some extent, the illumination angle is expanded as compared with the case where β = 180 °.

FIG. 4 shows a light source circuit of the scaler 20 shown in FIG. The light guide 10 is housed in the main body 21, and the connection electrodes 24b and 24d are directly connected to each other.
A circuit for identifying the presence of the light guide is formed. When the light guide 10 is not provided in the main body 21, the connection electrodes 24b and 24d are not directly connected or the connection electrodes 24b and 24d are not installed.

The light source 13 is housed in the connector section 31,
Furthermore, connection electrodes 25b and 25d are arranged. The light source 13 is connected to the connection electrode 25d and the switch SW,
The power source PS is connected to the switch SW and the connection electrode 25b.

When the main body 21 is attached to the connector portion 31,
The holder 11 of the light guide 10 approaches the light source 13, and the pin-shaped connection electrodes 24b and 24d are inserted into the cylindrical connection electrodes 25b and 25d to be electrically connected. Therefore, when the switch SW is closed, electric power from the power source PS is supplied to the light source 13, and the light source 13 is turned on. Most of the light from the light source 13 is the incident end surface 11 of the light guide 10.
It is incident on a and is transmitted to the vicinity of the tip of the main body 21.

On the other hand, if the body without a light guide in which the connection electrodes 24b and 24d are not directly connected or the connection electrodes 24b and 24d are not installed in the connector section 31, the connection electrode 25b is closed even if the switch SW is closed. ,
Since 25d is not electrically connected to each other, the light source 13 is not energized and does not light up.

In this way, the connection electrodes 24b and 24d and the connection electrodes 25b and 25d are respectively attached and detached in accordance with the attachment and detachment of the main body 21, and a switch mechanism for selecting the operation of the light source circuit according to the presence or absence of the light guide is constructed. By doing so, it is possible to prevent the light source from turning on when the main body without the light guide is attached.

FIG. 5 is a light source circuit showing another embodiment of the present invention. The light guide 10 is stored in the main body 21,
Further, an elongated pin-shaped connection electrode 40 is installed.
If the body 21 does not have the light guide 10, the connection electrode 40 is not provided.

The light source 13 is housed in the connector section 31,
Furthermore, cylindrical connection electrodes 41, 42 are arranged on a straight line with a predetermined space therebetween via an electrical insulator. Light source 13
Is connected to the connection electrode 42 and the switch SW, and the power source P
S is connected to the switch SW and the connection electrode 41.

When the main body 21 is attached to the connector portion 31,
The holder 11 of the light guide 10 is close to the light source 13, and the pin-shaped connection electrode 40 has a cylindrical connection electrode 41.
An electrical connection is made through 42. Therefore, when the switch SW is closed, electric power from the power source PS is supplied to the light source 13, and the light source 13 is turned on. Most of the light from the light source 13 enters the incident end surface 11a of the light guide 10 and enters the main body 2
1 will be transmitted near the tip.

On the other hand, when the main body without the light guide without the connection electrode 40 is attached to the connector section 31,
Even if the switch SW is closed, the connection electrodes 41 and 42 are not electrically connected to each other, so that the light source 13 is not energized and does not light up.

In this way, the connection electrode 40 and the connection electrodes 41 and 42 are respectively attached and detached according to the attachment and detachment of the main body 21, and a switch mechanism for selecting the operation of the light source circuit according to the presence or absence of the light guide is constructed. Thus, it is possible to prevent the light source from being turned on when the main body without the light guide is attached.

FIG. 6 is a light source circuit showing another embodiment of the present invention. The light guide 10 is stored in the main body 21,
Further, a thick rod-shaped connection electrode 40 is installed. If the main body 21 does not have the light guide 10,
The connection electrode 40 is not provided.

The light source 13 is housed in the connector section 31,
Further, curved spring-shaped connection electrodes 41, 42 are arranged to face each other with a predetermined gap. The light source 13 is connected to the connection electrode 42 and the switch SW, and the power source PS is connected to the switch SW and the connection electrode 41.

When the main body 21 is attached to the connector portion 31,
The holder 11 of the light guide 10 is close to the light source 13, and the rod-shaped connection electrode 40 is inserted between the connection electrodes 41 and 42 to make electrical connection. Therefore, when the switch SW is closed, electric power from the power source PS is supplied to the light source 13, and the light source 13 is turned on. Most of the light from the light source 13 enters the incident end surface 11a of the light guide 10 and enters the main body 2
1 will be transmitted near the tip.

On the other hand, when the main body without the light guide without the connection electrode 40 is attached to the connector section 31,
Even if the switch SW is closed, the connection electrodes 41 and 42 are not electrically connected to each other, so that the light source 13 is not energized and does not light up.

In this way, the connection electrode 40 and the connection electrodes 41 and 42 are attached and detached in accordance with the attachment and detachment of the main body 21,
By configuring the switch mechanism that selects the operation of the light source circuit according to the presence or absence of the light guide, it is possible to prevent the light source from being turned on when the main body without the light guide is mounted.

FIG. 7 is a light source circuit showing another embodiment of the present invention. The main body 2 in which the light guide 10 is not stored
1, an electrically insulating longitudinal member 43 is installed.
Further, when the light guide 10 is provided on the main body 21, the longitudinal member 43 is not provided.

The light source 13 is housed in the connector section 31,
Further, curved spring-shaped connection electrodes 41, 42 are arranged in contact with each other. The light source 13 is connected to the connection electrode 42 and the switch SW, and the power source PS is connected to the switch SW and the connection electrode 41.

When the main body 21 is attached to the connector portion 31,
The long member 43 is inserted between the connection electrodes 41 and 42,
Both are electrically insulated. Therefore, the switch SW
Since the connection electrodes 41 and 42 are not electrically connected to each other even when is closed, the light source 13 is not energized and does not light up.

On the other hand, when the main body 21 with the light guide is attached to the connector portion 31, the holder 1 of the light guide 10 is
Since 1 is close to the light source 13 and the main body 21 does not have the longitudinal member 43, the connection electrodes 41 and 42 are kept in contact with each other. Therefore, when the switch SW is closed, the light source 1
Power from the power supply PS is supplied to the light source 3, and the light source 13 is turned on. Most of the light from the light source 13 enters the incident end surface 11a of the light guide 10 and is transmitted to the vicinity of the tip of the main body 21.

Thus, in accordance with the attachment / detachment of the main body 21, the longitudinal member 43 is attached / detached to switch the conduction of the connection electrodes 41, 42, and a switch mechanism for selecting the operation of the light source circuit according to the presence or absence of the light guide is constructed. Thus, it is possible to prevent the light source from being turned on when the main body without the light guide is attached.

FIG. 8A is a sectional view of a three-way syringe 50 which is another embodiment of the present invention, and FIG. 8B is an end view of the nozzle 56. Three-way syringe 50
By operating the two levers 51, the three states of water, air, or mist (mixture of water and air) can be arbitrarily switched from the tip of the nozzle 56, and jetted toward the affected area. The main body 21 is water, air,
It can be attached to and detached from the connector portion 31 to which a tube (not shown) for feeding electric power and the like is connected, and the main body 21 alone can perform sterilization processing and disinfection processing.

The three-way syringe 50 has a water pipe 5
2. An air conduit 53 is provided, and when the lever 51 is operated, the water conduit 52 and the air conduit 53 are separately brought into conduction by the valve, water and air are supplied toward the nozzle 56, and the force is exerted from the tip. Gush well. In addition, a pipe connection mechanism is provided in the middle of the water pipe 52 and the air pipe 53 so that the main body 21 can be attached and detached.

The main body 21 is provided with a switch 60 that opens and closes according to the operation of the lever 51, and further has pin-shaped connection electrodes 24b and 24d. Both terminals of the switch 60 are connected to the connection electrodes 24b and 24d. ing. Also, a light guide 10 for illuminating the treatment site is stored. Similar to FIG. 3, the light guide 10 has a shape in which a plurality of optical fibers are bundled, the light source side is bundled in a circle by the holder 11, and the light emission side is formed in an annular shape.

As shown in FIG. 8B, a water ejection hole 54 for ejecting water is formed at the center of the tip of the nozzle 56, and an air ejection hole 55 for ejecting air is formed around the water ejection hole 54, and the periphery thereof. An annular light emitting end 12a is formed at the end of the nozzle 56, and illuminates illumination light that is rotationally symmetrical with respect to the axial center of the tip of the nozzle 56.

On the other hand, the light source 13 is housed in the connector section 31 in the same manner as described in the explanation of the ultrasonic scaler, and electric power is supplied through the electric wires 61 and 62 in the tube. Further, connection electrodes 25b and 25d that are attached to and detached from the connection electrodes 24b and 24d of the main body 21 are provided.

FIG. 9 shows a light source circuit of the three-way syringe 50 shown in FIG. The light guide 10 is provided on the main body 21.
, And the connection electrodes 24b and 24d are respectively connected to the switch 60 to form a circuit for identifying the presence of the light guide. The light guide 1 is attached to the main body 21.
When there is no 0, it means that nothing is connected to the connection electrodes 24b and 24d, that the connection electrodes 24b and 24d are not installed, or that no switch is installed.

The light source 13 is housed in the connector section 31,
Furthermore, connection electrodes 25b and 25d are arranged. The light source 13 is connected to the connection electrode 25d and the power supply PS, and the other end of the power supply PS is connected to the connection electrode 25b.

When the main body 21 is attached to the connector portion 31,
The holder 11 of the light guide 10 approaches the light source 13, and the pin-shaped connection electrodes 24b and 24d are inserted into the cylindrical connection electrodes 25b and 25d to be electrically connected. Therefore, when the lever 51 is pushed and the switch 60 is closed, electric power from the power source PS is supplied to the light source 13, and the light source 1
3 lights up. Most of the light from the light source 13 enters the incident end surface 11a of the light guide 10 and is transmitted to the tip of the nozzle 56.

On the other hand, nothing is connected to the connection electrodes 24b and 24d, or the main body without the light guide in which the connection electrodes 24b and 24d are not installed is connected to the connector portion 3
When attached to 1, the connection electrode 25
Since b and 25d are not electrically connected to each other, the light source 13 is not energized and does not light up.

In this way, the connection electrodes 24b and 24d and the connection electrodes 25b and 25d are respectively attached and detached according to the attachment and detachment of the main body 21, and a switch mechanism for selecting the operation of the light source circuit according to the presence or absence of the light guide is constructed. By doing so, it is possible to prevent the light source from turning on when the main body without the light guide is attached.

In each of the above embodiments, the pin-shaped electrode or the insulating member is provided on the main body, and the socket-shaped electrode is provided on the connector portion. On the contrary, the socket-shaped electrode is provided on the main body. You may provide a pin-shaped electrode or an insulating member in a connector part.

Although a scaler and a three-way syringe have been described as examples, the present invention is not limited to the air turbine handpiece, the micromotor handpiece,
It goes without saying that it can be applied to a vacuum syringe and the like. Further, in the embodiment, the handpiece in which the light source is incorporated in the connector portion is shown, but a type having a light guide in the connector portion and the tube and a light source in the end of the tube opposite to the connector portion may be used.

[0056]

As described above in detail, according to the present invention, the light source circuit can be operated when the main body accommodating the light guide is attached to the connector portion. Therefore, the light source can be arbitrarily turned on by controlling the power supply to the light source circuit. On the other hand, when the main body without the light guide is attached to the connector, the light source circuit cannot operate. Therefore, since the light source is not turned on even if the power supply to the light source circuit is mistakenly started, it is possible to prevent the life of the light source from being deteriorated due to unnecessary lighting. Moreover, it is possible to save the trouble of checking the presence or absence of the light guide when exchanging the main body, and to improve the efficiency of the treatment work.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a scaler 20 that is an embodiment of the present invention.

2A is a sectional view taken along line A1-A1 in FIG. 1, and FIG. 2B is a sectional view taken along line A2-A2 in FIG.

3A and 3B are diagrams showing the shape of the light guide 10 shown in FIG. 1, FIG. 3A being a plan view, FIG. 3B being a front view, and FIG.
3C is a left side view, FIG. 3D is a right side view, FIG.
3A is a cross-sectional view taken along the line A1-A1 in FIG. 3A, and FIG.
3B is a sectional view taken along line A2-A2 in FIG. 3B.
It is an A3-A3 sectional view inside.

4 is a light source circuit of the scaler 20 shown in FIG.

FIG. 5 is a light source circuit showing another embodiment of the present invention.

FIG. 6 is a light source circuit showing another embodiment of the present invention.

FIG. 7 is a light source circuit showing another embodiment of the present invention.

8A is a sectional view of a three-way syringe 50 which is another embodiment of the present invention, and FIG. 8B is an end view of a nozzle 56.

9 is a light source circuit of the three-way syringe 50 shown in FIG.

[Explanation of symbols]

 4 Tool 10 Light Guide 11, 12 Holder 11a Incident End Face 12a Emitting End Face 13 Light Source 20 Scaler 21 Main Body 22 Transducer 24, 24a to 24e Connection Electrode 26, 26a to 26e Electric Wire 25, 25b, 25e Connection Electrode 28 Tube 30 Fluid Pipeline 31 Connector 40, 41, 42 Connection Electrode 43 Rod-shaped Member 50 Three-way Syringe 51 Lever 52 Water Pipeline 53 Air Pipeline 54 Water Jet Hole 55 Air Jet Hole 56 Nozzle 61, 62 Electric Wire

Claims (1)

[Claims] 1. A built-in lighting device comprising: a main body of a dental treatment handpiece; and a connector portion to which the main body is detachably attached and which stores a light source or a light guide for generating light for illuminating a treatment site. Type dental handpiece, when a main body accommodating a light guide for transmitting light from the light source to a treatment site is attached to the connector portion, a light source circuit for enabling the light source to be turned on At the same time, a dental handpiece with a built-in lighting device is provided with switch means for disabling the operation of the light source circuit when the main body that does not house the light guide is attached to the connector portion.