JP3277069B2 - Dental handpiece with built-in lighting - Google Patents

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 a built-in illumination device for illuminating a treatment site.

[0002]

2. Description of the Related Art Conventionally, in dental treatment, an air turbine handpiece, a micromotor handpiece, a scaler, and a three-way have been used for cutting teeth, removing plaque, cleaning treated parts, and collecting cuttings and saliva. Various dental treatment handpieces such as a syringe and a vacuum syringe are used. When performing intraoral treatment using such a handpiece, treatment is performed by illuminating the inside of the oral cavity by turning on a surgical light separately installed on a medical table or the like.

[0003] However, depending on the posture of the patient, the treatment site, and the working direction of the operator, the lighting in the oral cavity is insufficient, making it difficult to observe. In each case, it is necessary to adjust the position of the surgical light. This leads to a decrease in workability.

Therefore, in recent years, handpieces have been developed and put into practical use in which a light guide is built into the main body of the handpiece and light is emitted from the tip of the handpiece to illuminate a treatment site (Japanese Patent Application Laid-Open No. H10-157572). Showa 60-58139,
Japanese Patent Publication No. 5-56975, Japanese Utility Model Publication No. 3-13301).

On the other hand, a main body of a dental treatment handpiece,
A handpiece is generally used which includes a connector to which a tube for supplying water, air, electric power, or the like from an external device or for suctioning to the external device is connected, and the main body and the connector are configured to be detachable from each other. Maintenance such as cleaning and sterilization is simplified. Further, for example, when the handpiece is an ultrasonic scaler, tools having various shapes are mounted on the main body. When it is desired to replace an appropriate tool in accordance with the treatment performed by the operator, the tool is firmly fixed to the main body by screwing, so that the replacement operation is troublesome. Therefore, there is a case where a plurality of main bodies equipped with tools of various shapes are prepared in advance, and a tool is exchanged by mounting a main body with a desired tool on the connector portion.

For example, in the case of an ultrasonic scaler as described above, a structure in which a light guide is not built in the main body is widely used. Thus, a main body without a light guide which has been widely used in the past is used. In recent years, there has been a demand for a configuration in which a body incorporating a light guide which has been used recently can be detachably exchanged with a connector to be connected.

In the case where an illumination device for illuminating the inside of the oral cavity is incorporated in a handpiece in which the main body and the connector unit are detachable from each other, a light source for generating light for illuminating a treatment site is connected to the connector unit. A handpiece that has been downsized has been developed by housing a light guide for transmitting light from the light source or the light guide to a treatment site in a main body.

[0008]

However, in the conventional handpiece, on / off control of the illumination light source housed in the connector portion or the base end portion of the tube is performed by an external light source driving device. Therefore, when the body without a light guide is installed and the external light source driving device is forgotten to be turned off, the light source housed in the connector part is always turned on, and the life of the light source is deteriorated due to unnecessary lighting. ing. The light source built in the handpiece is expensive because it is required to have a small size and high performance capable of emitting high-luminance light.

In order to avoid unnecessary lighting, the surgeon must operate the light source switch while checking the presence or absence of the light guide when replacing the main body. This is complicated.

[0010] An object of the present invention is to provide a dental handpiece with a built-in illuminating device, which can save the trouble of confirming the presence or absence of a light guide when replacing the main body and can prevent the life from being deteriorated due to unnecessary lighting of the light source. That is.

[0011]

SUMMARY OF THE INVENTION According to the present invention, a first and a second main body 21 of a dental treatment handpiece and the first and a second main body are detachably mounted and illuminated to illuminate a treatment site. A light source for generating light for the light source or a connector unit 31 for housing a light guide for a connector unit for directing the light of the light source to the main body 21; and an external device including a switch SW. The first body light guide 10 for transmitting the light to the treatment site is housed, and a pair of first pin-shaped connection electrodes 24b and 24d directly connected to each other.
Is installed, and the first main body 21 is attached to the connector portion 31 in a state where the pair of first main body pin-shaped connection electrodes 24 are mounted.
A pair of cylindrical connection electrodes 25b and 25d into which b and 24d are inserted and electrically connected, respectively, and a pair of cylindrical connection electrodes 25b and 25d are formed by a pair of first body pin connection electrodes 24b and 24d. The light source 13 is provided with a light source circuit in which power from the power source PS is supplied to the light source 13 via the switch SW when the light source 13 is turned on. The second main body includes a light guide for transmitting light from the light source to the treatment site. 10 are not housed, and a pair of second body pin-shaped connection electrodes 24b, 2 that can be inserted into the cylindrical connection electrodes 25b, 25d, respectively.
Reference numeral 4d denotes a dental handpiece with a built-in lighting device, which is installed without being directly connected to each other. The present invention also provides a light source or a light source for generating light for illuminating a treatment site, wherein the first and second main bodies 21 of the dental treatment handpiece and the first and second main bodies are detachably mounted. A light guide for the connector part 31 for receiving light from the light source toward the main body 21; and a light guide 10 for the first main body for transmitting light from the light source to the treatment site. A switch 60 housed and manually operated by an operator, and a pair of first body pin-shaped connection electrodes 24b and 24d connected via the switch 60
Is mounted on the connector portion 31, and the first main body 21 is mounted on the connector portion 31.
A pair of cylindrical connection electrodes 25b and 25d into which b and 24d are inserted and electrically connected, respectively, and a pair of cylindrical connection electrodes 25b and 25d are formed by a pair of first body pin connection electrodes 24b and 24d. The light source 13 is provided with a light source circuit to which power from the power supply PS is supplied by being turned on via the switch 60.
The light guide 10 for transmitting the light from 3 to the treatment site is not housed, and nothing is connected to the pair of second body pin-shaped connection electrodes 24b, 24d that can be inserted into the cylindrical connection electrodes 25b, 25d. And a dental handpiece with a built-in lighting device.

[0012]

According to the present invention, when the first main body containing the first main body light guide is mounted on the connector, the light source circuit can operate. Therefore, the light source can be arbitrarily turned on by controlling the energization of the light source circuit. On the other hand, when the second body without the light guide is mounted on the connector portion, the operation of the light source circuit becomes impossible. Therefore, even if the power supply to the light source circuit is started by mistake, the light source is not turned on, so that the life of the light source can be prevented from being deteriorated. A switch SW is provided in the external device, and when the switch is in a conductive state, the first main body is mounted on the connector portion, whereby a pair of cylindrical connection electrodes 25 provided on the connector portion are provided.
b, 25d, a pair of pin-shaped connection electrodes 24 for the first main body.
b and 24d are inserted, respectively, and the power from the power supply PS is supplied to the light source 13 via the switch SW, so that the light source can be turned on as described above. Even in a configuration in which the first main body 21 is provided with the switch 60 that is manually operated by the operator, a light source circuit is formed, and power is supplied to the light source 13. When the second main body in which the light guide 10 is not housed is mounted on the connector portion, a pair of second main body pin-shaped connection electrodes 24b installed on the second main body.
24d is a pair of cylindrical connection electrodes 25b, 2 of the connector part.
5d. A pair of pin-shaped connection electrodes 24 for the first body provided on the first and second bodies in this manner.
b, 24d and a pair of second body pin-shaped connection electrodes 24
b and 24d are respectively inserted into a pair of tubular connection electrodes 25b and 25d provided in a common connector part, so that the first main body and the connector part are positioned in the circumferential direction, and the second part is connected to the second connector.
The circumferential positioning of the main body and the connector portion can be accurately performed, and this makes it possible to position the light source of the connector portion or the light guide for the connector precisely, in particular, with the light guide of the first main body. And light transmission can be ensured.

[0013]

FIG. 1 is a sectional view of a scaler 20 according to one embodiment of the present invention. A vibrator 22 that vibrates by an ultrasonic wave is incorporated in a main body 21 of the scaler 20, and the vibrator 2 is detachably attached to a tool 4 that is a dental treatment tool.
2 drive unit. The vibration generated by the vibrator 22 is efficiently transmitted to the tip of the tool 4, and when the tool 4 comes into contact with plaque or calculus adhered to the teeth, calculus or plaque can be quickly removed.

The main body 21 is detachable from the connector section 31 to which the tube 28 is connected, and sterilization processing, repair replacement, and the like can be performed by the main body 21 alone. Electric power for driving the vibrator 22 is supplied from an external device via the electric wire 23 and the connection electrode 24 housed in the main body 21 and the connection electrode 25 and the electric wire 26 housed in the connector 27 on the connector 31 side. Supplied.

Further, in order to inject a fluid such as water from around the tool 4 toward the affected part, and to cool the vibrator 22,
A fluid conduit 30 is formed in the tube 28, and a pipe connection mechanism corresponding to the attachment / detachment of the main body 21 is provided 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. The light source 13 is supplied with electric power through an electric wire in a tube 28. The light is turned on or off by operating the switch SW of the external device. On the other hand, the light guide 10 including a plurality of optical fibers is built in the main body 21 so as to cover the periphery of the vibrator 22, and the incident end face 11 a of the light guide 10 is positioned so as to be almost in close contact with the light source 13. ing. The emission end face 12 a of the light guide 10 is formed in an annular shape so as to surround the tool 4, and emits rotationally symmetric illumination light with respect to the axis of the main body 21.

FIG. 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. In FIG. 2A, the connector 31
A fluid conduit 30 is disposed at the axis of the light guide 10, and a light guide 10 that is bound in a circular shape is disposed above the fluid conduit 30.
In addition, five connection electrodes 24 a to 24 a
24e, for example, the connection electrodes 24a, 2e
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 and 24d
Are directly connected to each other to form a circuit for identifying the presence of a light guide.

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

FIG. 3 is a view showing the shape of the light guide 10 shown in FIG. 1, wherein FIG. 3 (a) is a plan view, FIG. 3 (b) is a front view, and FIG. 3 (c) is a left side view. 3 (d) is a right side view,
FIG. 3E is a sectional view taken along line A1-A1 in FIG.
(F) is a sectional view taken along line A2-A2 in FIG. 3 (b), 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 is bundled together by a holder 11 to form a circular incident end face 11a. The other end is, as shown in FIG. 3E, a pair of large and small cylindrical holders 12.
To form an annular exit end face 12a. The emission end surface 12a is formed with an inclined surface that is inclined so as to be concave from the peripheral edge toward the center, and the opening angle β is set to be smaller than 180 °, for example, about β = 150 °. Since the emission end surface 12a has the inclined surface that 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 increases, and the illumination region of the treatment site can be expanded. Also,
As shown in FIGS. 3A and 3F, an intermediate portion of the light guide 10 has a shape branched into two according to the outer shape of the vibrator 22 in FIG.

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

The optical fiber is made 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. Autoclave is possible.

Returning to FIG. 1, the light radiated from the light source 13 is incident from the incident end face 11a, passes through the light guide 10, and the rotationally symmetric illumination light is emitted from the output end face 12a. In particular, the opening angle β = 150 ° on the emission end face 12a.
Since the inclined surface of the degree is formed, the illumination angle is enlarged as compared with the case of 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 a light guide is formed. When the light guide 10 is not provided on the main body 21, the connection electrodes 24b and 24d are not directly connected.

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

When the main body 21 is mounted on the connector section 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. Then, when the switch SW is closed, the power from the power supply 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 incident on the incident end face 11 of the light guide 10.
a and is transmitted to near the tip of the main body 21.

On the other hand, when a body without a light guide to which the connection electrodes 24b and 24d are not directly connected is attached to the connector section 31, even if the switch SW is closed, the connection electrodes 25b and 2d are not connected.
Since 5d is not conductive, the light source 13 is not energized and does not light.

Thus, 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 formed. Accordingly, the lighting of the light source when the main body without the light guide is mounted can be prevented.

FIG. 5A is a sectional view of a three-way syringe 50 according to another embodiment of the present invention, and FIG. 5B is an end view of a nozzle 56. Three-way syringe 50
By operating the two levers 51, the three states of water, air, or mist (mixing of water and air) can be arbitrarily switched from the tip of the nozzle 56 and ejected toward the affected part. The main body 21 is made of water, air,
It is detachable from the connector section 31 to which a tube (not shown) for supplying electric power or the like is connected, and the main body 21 alone can perform sterilization processing, disinfection processing, and the like.

The three-way syringe 50 has a water pipe 5
2. An air line 53 is provided, and when the lever 51 is operated, the water line 52 and the air line 53 are separately conducted by a valve, and water and air are supplied toward the nozzle 56, and momentum is supplied from the tip. It gushes well. In addition, a pipe connection mechanism corresponding to the attachment / detachment of the main body 21 is provided in the middle of the water pipe 52 and the air pipe 53.

The main body 21 is provided with a switch 60 that opens and closes in response 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. 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 circular shape by the holder 11, and the light emission side is formed in an annular shape.

As shown in FIG. 5B, 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 55. An annular light emitting end 12a is formed on the nozzle 56, and emits rotationally symmetric illumination light with respect to the axis 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 that described in the description of the ultrasonic scaler, and power is supplied through electric wires 61 and 62 in the tube. Further, connection electrodes 25b and 25d which are detachably connected to the connection electrodes 24b and 24d of the main body 21 are provided.

FIG. 6 shows a light source circuit of the three-way syringe 50 shown in FIG. The body 21 has a light guide 10
Are stored, and the connection electrodes 24b and 24d are connected to the switch 60, respectively, to form a circuit for identifying the presence of a light guide. The light guide 1 is attached to the main body 21.
If there is no 0, nothing is connected to the connection electrodes 24b and 24d.

The light source 13 is housed in the connector section 31,
Further, 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 mounted on the connector section 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. Then, when the switch 60 is closed by pressing the lever 51, the power from the power source PS is supplied to the light source 13 and the light source 1 is turned on.
3 lights up. Most of the light from the light source 13 enters the incident end face 11 a of the light guide 10 and is transmitted to the tip of the nozzle 56.

On the other hand, the main body without the light guide which is not connected to the connection electrodes 24b and 24d is connected to the connector 31.
, The connection electrode 25b,
Since 25d does not conduct with each other, the light source 13 is not energized and does not light.

In this way, the connection electrodes 24b and 24d and the connection electrodes 25b and 25d are respectively attached and detached in accordance with 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 constituted. Accordingly, the lighting of the light source when the main body without the light guide is mounted can be prevented.

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

Although the embodiments have been described with reference to a scaler and a three-way syringe, the present invention relates to an air turbine handpiece, a micromotor handpiece,
It goes without saying that the present invention can be applied to a vacuum syringe and the like. Further, in the embodiment, the handpiece in which the light source is built in the connector portion is shown, but a type in which the light guide is provided in the connector portion and the tube and the light source is provided in the end of the tube opposite to the connector portion may be used.

[0041]

As described above in detail, according to the present invention, when the first body containing the light guide is mounted on the connector, the light source circuit can operate. Therefore, the light source can be arbitrarily turned on by controlling the energization of the light source circuit. On the other hand, the second without light guide
When the main body is attached to the connector section, the operation of the light source circuit becomes impossible. Therefore, even if the power supply to the light source circuit is started by mistake, the light source is not turned on, so that the life of the light source can be prevented from being deteriorated due to unnecessary lighting. Moreover, when replacing the main body, the trouble of checking the presence or absence of the light guide can be omitted, and the efficiency of the treatment operation can be improved. In particular, according to the present invention, the first main body includes a pair of first main body pin-shaped connection electrodes 24b,
24d, the second main body is also provided with pin-shaped connection electrodes 24b, 24d for the second main body, and the first and second main bodies are mounted on the connector portion, so that these first and second main bodies are connected. The pin-shaped connection electrodes 24b and 24d are inserted into a pair of cylindrical connection electrodes 25b and 25d of the connector, respectively. Also, the first and second bodies can be accurately positioned and mounted. Therefore, in particular, when the first main body is mounted on the connector section, the light source of the first main body or the light guide for the connector section is accurately positioned and opposed to the light guide of the first main body, so that the light transmission is ensured. Become.

[Brief description of the drawings]

FIG. 1 is a sectional view of a scaler 20 according to an embodiment of the present invention.

2A is a cross-sectional view taken along line A1-A1 in FIG. 1, and FIG. 2B is a cross-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, wherein FIG. 3A is a plan view, FIG. 3B is a front view, and FIG.
3C is a left side view, FIG. 3D is a right side view, and FIG.
3A is a sectional view taken along line A1-A1 in FIG. 3A, and FIG.
FIG. 3B is a sectional view taken along line A2-A2 in FIG. 3B, and FIG.
It is A3-A3 sectional drawing in the inside.

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

5A is a sectional view of a three-way syringe 50 according to another embodiment of the present invention, and FIG. 5B is an end view of a nozzle 56.

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

[Explanation of symbols]

 Reference Signs List 4 tool 10 light guide 11, 12 holder 11a incident end face 12a emission end face 13 light source 20 scaler 21 main body 22 vibrator 24, 24a to 24e connection electrode 26, 26a to 26e electric wire 25, 25b, 25e connection electrode 28 tube 30 fluid conduit 31 Connector part 50 Three-way syringe 51 Lever 52 Water conduit 53 Air conduit 54 Water outlet 55 Air outlet 56 Nozzle 61, 62 Electric wire

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A61C 1/08 A61C 1/07 A61C 3/03 A61C 17/00

Claims (2)

(57) [Claims] 1. A light source for generating light for illuminating a treatment site, wherein a first and a second main body 21 of a dental treatment handpiece are detachably mounted on the first and second main bodies, and A light source for the light source is directed to the main body 21, and a connector part 31 containing a light guide for the connector part is provided. An external device including a switch SW is provided. The first main body 21 transmits light from the light source to a treatment site. A pair of first pin-shaped connection electrodes 24b, 2 that house the first body light guide 10 and are directly connected to each other
4d is installed, and a pair of first main body pin-shaped connection electrodes 24b and 24d are inserted into the connector section 31 and the first main body 21 is mounted on the first main body 21, respectively. When the pair of cylindrical connection electrodes 25b and 25d and the pair of cylindrical connection electrodes 25b and 25d are conducted by the pair of first body pin-shaped connection electrodes 24b and 24d, the power from the power source PS is supplied to the light source 13. A light source circuit to be supplied via the switch SW; a second main body comprising: a light guide 10 for transmitting light from the light source to a treatment site.
And a pair of second main body pin connection electrodes 24b and 24d insertable into the cylindrical connection electrodes 25b and 25d, respectively, are installed without being directly connected to each other. Built-in dental handpiece. 2. A light source for generating light for illuminating a treatment site, wherein the first and second main bodies 21 of the dental treatment handpiece are detachably mounted on the first and second main bodies, and A light guide for the connector portion which accommodates a light guide for the connector portion for directing the light from the light source toward the main body 21; and a first main body light guide 10 for transmitting the light from the light source to the treatment site. A switch 60 that is housed and manually operated by an operator, and a pair of first body pin-shaped connection electrodes 24b and 24d connected via the switch 60 are installed. The pair of first connection pins 24b, 24d are inserted and electrically connected to each other with the pair of first connection pins 25b, 25d inserted therein, and the pair of first connection electrodes 25, respectively. , The switch 60 25d are a pair of first body pin-shaped connection electrodes 24b, by 24d
The light source 13 is provided with a light source circuit to which electric power from the power supply PS is supplied by conduction through the light source 13. The second main body includes a light guide 10 that transmits light from the light source 13 to a treatment site. A lighting device with a built-in lighting device characterized in that it is installed without being connected to the pair of second main body pin-shaped connection electrodes 24b, 24d which can be inserted into the cylindrical connection electrodes 25b, 25d. Dental handpiece.