JP2000166995A - Dental treatment instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dental treatment instrument capable of automatically moving a dental treatment device holding means to a position most suitable for the purpose of treatment so as to allow an operator to execute correct and speedy treatment by constant movement without forcing a patient to unnecessarily change his/her posture. SOLUTION: This dental treatment instrument 10 is provided with a patient treating table 1, an operator's chair 2 and a dental treating tool holding means 3 and is provided with a driving means for moving the means 3 to an optional position, a storing means for storing the position of this dental treating tool holding means, a position detecting means for detecting the position of the chair 2 and a holding means position automatically setting switch. Thus, in the case of operating this holding means position automatically setting switch, the means 3 is automatically moved to corresponding optimal positions 3[1] and 3[2] stored in the storing means in advance corresponding to the positions 2[1] and 2[2] of the chair 2 detected by the position detecting means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a dental treatment instrument holding means of a dental treatment device.

[0002]

2. Description of the Related Art A dental care apparatus includes a patient couch for holding a patient in a sitting position or a supine position, an operator's chair, and a dental care tool holding means for mounting or locking a dental care tool such as a handpiece. And put the patient on the examination table,
An appropriate treatment posture is set and held, while the operator sits or stands at a position appropriate for dental treatment and performs necessary treatment.

[0003] In this case, in order to smoothly carry out the necessary treatment, the dental treatment instrument holding means for mounting or locking the dental treatment instrument necessary for the treatment remains in the position of the operator.
It is desirable to be in the most convenient place. In addition, it is desirable that the position of the oral cavity of the patient and the position of the lighting device are also at the optimum positions corresponding to the position of the operator. In response to this request, in the conventional dental care apparatus, the position and orientation of the dental care instrument holding means and the lighting device can be manually set using a so-called free arm type position holding means. In addition, the elevating and lowering of the examination table and the tilting of the back plate, which determine the treatment posture of the patient, are performed by a semi-automatic driving device.

FIGS. 13A and 13B show an example of such a conventional dental treatment apparatus, wherein FIG. 13A is a plan view thereof, and FIG.
Is a side view thereof. The dental care apparatus 100 includes a patient treatment table 105 including a sheet 101, a back plate 102, a headrest 103, and a footrest 104, and a film viewer 106 for observing an X-ray film or the like.
Medical instrument holding means 108 provided with a holder 107 for locking a dental medical instrument such as a handpiece and the like, and a holding arm 1 supporting the dental medical instrument holding means 108
09, a support portion 110 for supporting the holding arm 109, a base 111 for supporting the support portion 110 and the treatment table 105, and a built-in elevating device, a spiton 112, and a lighting device 1.
13, an illumination arm 114 for supporting the illumination arm 114 at any position, an illumination pole 115 for supporting the illumination arm 114, and an illumination support section 116 on which the illumination pole 115 is erected.

In this dental care apparatus 100, a patient C is treated in a treatment posture [1] in a supine position as shown in the figure, and the operator first manually positions the lighting device 113 on the patient. Is set at an appropriate position, and then, in the plan view of FIG. 13A, the center of the clock face is placed in the oral cavity of the patient, and the patient's crown, that is, at 12:00 of the clock, The patient is placed in a sitting position in the position of and the treatment is performed. In this case, the dental care instrument holding means 108 was manually set at the position at which the work was most easily performed at the 12 o'clock position, but it took a certain amount of time to set it at the correct position. .

[0006] Further, depending on the contents of the treatment, the treatment is performed around the right ear of the patient, that is, at the position of 10 o'clock on the clock in the above expression, in this case,
Further, the dental care instrument holding means 108 is manually moved to a position where the work is most easily performed. Further, depending on the case, as shown by an arrow in FIG. 13B, the patient may be treated in the sitting position [3]. In this case, the lighting device 113 does not hit the patient. As described above, it was necessary to move the patient to an appropriate position in the sitting position, and also manually move the dental care tool holding means 108. At this time, in order to treat the patient in a sitting position, the patient treatment table 105 must be moved up and down or the back plate 102 must be tilted.

In order to solve this problem, the position of the patient treatment table including the tilt of the back plate, the position of the lighting device, the position of the holding device for dental medical instruments, and the like are set in advance by operating a predetermined switch. Positions, treatment positions, dental care devices that automatically move to a retreat position, etc. have also been proposed, but the types of set positions are limited, and the selection of a predetermined switch is In some cases, it was necessary, troublesome, or a mistake in selection forced the patient to change his posture unnecessarily.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and allows an operator to perform an accurate and prompt treatment with a constant movement without forcing a patient to change his posture. The dental equipment that can automatically move the related equipment required for treatment, that is, the holding device for dental care equipment, the patient treatment table, the lighting device, etc., to the position most suitable for the purpose of treatment. It is intended to provide a medical care device.

[0009]

According to a first aspect of the present invention, there is provided a dental care apparatus for placing or holding a patient care table for holding a patient in a sitting position or a supine position, an operator's chair, and a dental care device. A dental treatment device comprising: a dental treatment device holding device to be stopped; a driving device for moving the dental treatment device holding device to an arbitrary position; a storage device for storing a position of the dental treatment device holding device; A position detecting means for detecting the position of the operator, and a holding means automatic position setting switch. When the holding means automatic position setting switch is operated, the position corresponding to the position of the operator chair detected by the position detecting means. At the corresponding optimal position stored in the storage means in advance,
The dental treatment instrument holding means is automatically moved.

[0010] This dental care apparatus is provided with a dental care tool holding means for mounting or locking a dental care tool such as a handpiece, a so-called tray table, by operating a holding means position automatic setting switch, the operator's chair at that time. Is automatically moved to the corresponding optimum position in accordance with the position of (1). In other words, the position of the operator's chair, in effect,
In accordance with the position of the surgeon, the dental treatment instrument holding means is automatically moved to a position where the surgeon is most comfortable to use.

Conventionally, various types of devices for automatically moving a dental care device holding means or the like to a predetermined set position by a selection switch have been proposed. However, in accordance with the position of the operator's chair, that is, the position of the operator, There was no device that automatically moved the dental care device holding means. The present inventor, after studying the treatment actual situation of dental treatment in detail, found that the position setting of equipment related to dental treatment is optimally determined based on the position of the operator's chair, This is used for the conventional automatic moving means. This is because most dental treatments are performed while the operator is in a sitting position, and treatment performed in a standing position is limited to around the 9 o'clock position described in the conventional example. This is because if it is detected that the user stands up from the chair, it is possible to cope with this standing.

Therefore, only by operating the automatic setting switch, the dental care instrument holding means moves to the corresponding optimum position, which is the optimum position, in accordance with the position of the operator, which is very convenient for dental care. In addition, since it is not necessary to operate a plurality of selection switches, there is no mistake in selection, the posture of the patient is not unnecessarily changed unnecessarily, and the burden on the patient is reduced.

In this case, a method based on the position of the patient's oral cavity, which is the treatment site, can be considered. In this case, even if the patient's oral cavity is in the same position in the supine position, it is not convenient for the treatment. However, it cannot cope with the case where the position of the operator changes. According to a second aspect of the present invention, in the dental care apparatus according to the first aspect, the position detecting means of the operator's chair detects a relative position of the operator's chair with respect to the patient's table.

In this dental care apparatus, the position of the operator's chair is detected by detecting the position of the patient relative to the patient's medical table on which the patient is held. Position detection, that is, at 12:00, 9
Positions such as time can be accurately and easily detected. According to a third aspect of the present invention, in the dental care apparatus according to any one of the first and second aspects, when the holding unit position automatic setting switch is operated, the position of the operator's chair detected by the position detecting unit is further determined. The patient's couch is automatically moved up and down and / or its back plate is tilted to the corresponding optimum position stored in the storage means in advance.

Further, in this dental care apparatus, the patient's clinic table related to the dental care is also moved up and down and the back plate is automatically tilted based on the position of the operator's chair, which is an optimum position movement criterion. Therefore, it is possible to move without mistakes, and it is convenient. The dental medical treatment device according to claim 4 is the dental treatment device according to claims 1 to
In any one of the above three cases, when the holding means position automatic setting switch is operated, the position of the operator's chair detected by the position detecting means is automatically stored in advance in the storing means. The lighting device of the patient couch is moved and / or turned on and off to the corresponding optimal position.

In this dental care apparatus, the movement and turning on / off of the lighting device related to the dental care are automatically performed based on the position of the operator's chair, which is the optimum position movement determination criterion. There are no settings and convenience is good.
The dental care device according to claim 5 includes a patient table for holding a patient in a sitting position or a supine position, a chair for an operator, and a dental device holding unit for mounting or locking a dental device. In this dental care apparatus, the position holding means for holding the dental care tool holding means at an arbitrary position includes a stable holding position setting means for setting a stable holding position for movement of the dental care tool holding means. The instrument holding means is characterized in that the stable position is selectively held by manual operation at a predetermined corresponding optimum position set in advance by the stable holding position setting means in correspondence with the operator's chair.

This dental care apparatus is characterized in that the position movement determination, which is a feature of the dental care apparatus according to claim 1, is performed based on the position of the operator's chair, and the position of the manually movable dental care instrument holding means is maintained. It is applied to the means. In order to realize this, the position holding means includes a stable holding position setting means using a latch means or the like. According to this stable holding position setting means, for example, if the height of the dental medical instrument holding means is manually set to an appropriate height and the stable holding height position is set at that height, then another height is set. In this position, the dental care instrument holding means can be stably moved to its stable holding height position and hold its position by only slightly pushing the dental care instrument holding means in the direction of its stable holding height position.

Therefore, even if the automatic means is not used, the dental medical instrument holding means is similarly moved by a slight manual operation to the optimum corresponding position based on the position of the operator's chair which is the optimum position movement criterion. It is convenient because it can be done. In the dental care apparatus according to claim 6, in claim 5, the position holding means is any one of X-axis, Y-axis, Z-axis, and rotation single position holding means of the dental care instrument holding means, or It is constituted by any combination, and the stable holding position setting means is provided corresponding to each single position holding means.

In this dental care apparatus, the position holding means and the stable holding position setting means according to claim 5 are more specifically defined corresponding to the moving direction of the dental care instrument holding means. It is possible to easily realize a dental care device exhibiting the effect of (1). The position holding means provided with the stable holding position setting means according to claim 5 and claim 6,
It can also be used as a position holding unit of the lighting device, and in that case, the same effect is exhibited.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 conceptually shows a corresponding optimum position corresponding to a position of an operator's chair in an example of the dental care apparatus of the present invention.
Plan view of the corresponding optimal position [1] when at the 2 o'clock position,
(B) is a top view of the corresponding optimal position [2] when the operator is at the position of 10 o'clock.

This figure conceptually shows only the related equipment which changes the position in relation to the medical treatment of the dental care apparatus, and detailed parts are omitted, but the equipment shown in the conventional example is omitted. Are similarly installed. The dental care apparatus 10 includes a patient couch 1 for holding a patient C in a sitting position or a supine position, a chair 2 for an operator, a dental care tool holding means 3 for mounting or locking a dental care tool T, a treatment site. And an illumination device 4 for illuminating the oral cavity of the patient C.

The patient couch 1 is provided with a driving means, which can be moved up and down, and has a tiltable back plate 11. The operator's chair 2 is a movable type, and as described below,
A position detecting means (not shown) for detecting a relative position with respect to the patient table 1 is provided. Dental medical instrument holding means 3
As described later, the holding means 3 is supported by a supporting means (not shown) having a driving means, and the holding means 3 is moved to a desired X-axis position (FIG. 1).
1), the Y-axis position (the vertical position in FIG. 1), the Z-axis (the vertical position in FIG. 2B), and the desired rotational position (the direction of the holding means 3 in FIG. Display).

The lighting device 4 is supported by a lighting arm 41 that supports the lighting device 4 while holding the position freely.
The illumination arm 41 is rotatably supported by a support block 42 provided on the treatment table 1 so as to be able to hold a position. The illumination arm 41 and the support block 42 also include a driving unit (not shown) for moving the illumination device 4 to a desired position and changing the illumination direction.

B shown in the figure is an X-axis reference position, which can be set arbitrarily. With respect to the X-axis reference position B, the oral position of the patient C in the X-axis direction is X0, and the oral position of the patient C is The position of the operator O is indicated by X1, and the position of the holding means 3 with respect to the position of the operator O is indicated by X. With respect to the Y-axis direction, the midline of the patient C, that is, the center line in the width direction of the medical table 1 is set as a reference position, the position of the operator O is Y1, and the position of the holding unit 3 with respect to the position of the operator O is Y. Is shown. Regarding the rotational position, the inclination of the center line of the width in the longitudinal direction of the holding means 3 in the counterclockwise direction with respect to the center line of the medical table 1 in the width direction is indicated by θ.

The feature of the dental care apparatus 10 is that, when a holding means position automatic setting switch (not shown) is operated,
As shown in (a), the patient's treatment table 1 and the dentist are placed at a preset corresponding optimal position [1] with respect to the 12 o'clock position [1] of the operator O detected at the position of the operator's chair 2. The medical instrument holding means 3 and the lighting device 4 are automatically moved, and the lighting device 4 is turned on according to the setting. In the figure, the corresponding positions are indicated by adding the same “[1]” symbol.

On the other hand, even if the switch for automatically setting the position of the holding means is operated in the same manner, the operator's chair 2 is moved to the position 1 in FIG.
When it is at the 0 o'clock position [2], the 10 o'clock position [2] is set in advance.
The patient treatment table 1, the dental treatment instrument holding means 3, and the lighting device 4 are automatically moved to the corresponding optimal position [2] set in correspondence with the above. In this figure, the height of the dental medical instrument holding means 3 is adjusted so as not to hit the patient. In this case also,
The symbol “[2]” is added.

As described above, in the dental care apparatus 10,
When the holding means position automatic setting switch is operated, the position of the operator's chair 2 at that time is detected, and it is determined whether the operator O is at the 12 o'clock position [1] or at the 10 o'clock position [2]. Then, the related equipment is moved to the optimum corresponding position [1] or [2] in accordance therewith, so that there is no mistake in position selection and no extra posture change is required for the patient. Also,
The operator O can always use the dental treatment tool T placed on the dental treatment tool holding means 3 at the most convenient position toward the patient in the most suitable lighting condition and position.

Here, as an example, an example of the automatic movement at the 12 o'clock position [1] and the 10 o'clock position [2] has been described. However, the present invention is not limited to this, and the 9 o'clock position and other positions are also applicable. , You can set the automatic movement.
In addition, it is preferable to determine whether or not there is an operator's chair at each position by providing a certain allowable range.

FIG. 2 conceptually shows the optimal position [1] when the operator is at the sitting position of 12 o'clock in the embodiment of the dental care apparatus of the present invention. FIG. 3B is a plan view, FIG. 3B is a side view thereof, and FIG. 3 conceptually shows a corresponding optimum position [3] when the operator is in a standing position.
(A) is the top view, (b) is the side view.

FIG. 2 shows the same corresponding optimum position [1] as in FIG. 1 (a). Here, a side view is also shown along with a plan view. Further, from here on, the same parts are denoted by the same reference numerals, and redundant description will be omitted. 2 and 3, the operator's sitting position 1 is the same as in FIG. 1.
The optimum corresponding positions set corresponding to the 2 o'clock position [1] and the upright 9 o'clock position [3] are denoted by reference signs “[1]” and
This is indicated by “[3]”. Reference numeral 12 denotes a medical table base on which the patient table 1 is mounted, and has a built-in drive means for moving the medical table 1 up and down.

In FIGS. 2 and 3, in the Z-axis direction, the height of the surface of the dental treatment instrument holding means 3 from the floor surface is shown as a reference position. As shown in these figures, in this dental care apparatus 10, when the holding means position automatic setting switch is operated, the position of the operator's chair 2 at that time is detected, and the operator is seated at the 12 o'clock position [1]. ]
Or at the 9 o'clock position [3] in the upright position, and automatically raises and lowers the patient treatment table 1 to the corresponding optimal positions [1] and [3], respectively. Is tilted, the dental care instrument holding means 3 is moved and rotated, and the lighting device 4 is moved and turned on and off.

As described above, in the dental practice, when the surgeon performs the medical treatment in an upright position, the upright position 9 described here is used.
Normally, the time position [3] is set. Therefore, if a detecting means for detecting whether or not the operator is seated on the operator's chair is installed, the operator can be in the standing 9 o'clock position [ 3] can be detected. In this case, the same, 9
Even at the hour position, if a seat is detected, it can be determined that the operator is at the 9 o'clock position.

Further, here, the patient treatment table 1 has been described as an example of a flat type in which the footrest 104 (see FIG. 13) is not provided as in the conventional example, but a footrest is provided as in this conventional example. Patient treatment tables with a knee that bends and various other types of treatment tables are also included in the patient treatment table of the present invention.

FIG. 4 is a conceptual diagram showing an example of the configuration of the driving means of the dental treatment instrument holding means of the present invention. The driving unit is an example of various driving units installed on an appropriate installation place of the dental care apparatus 10, a base of a treatment table, a floor, a ceiling, or the like, as will be described later. It also serves as a support means, and each of the movable parts is provided with a position detecting means for detecting its moving position.

The driving means includes a support block 33 installed on the treatment table base 12 (see FIGS. 2 and 3 (b)), two horizontally rotating arms 34 and 36, and a mechanism for moving the arm 34 up and down. A rotary shaft 37 that is installed on the auxiliary cylinder 35 and the arm 36 and rotatably supports the dental medical instrument holding means 3.
It is composed of The support block 33 includes an arm 34
Is rotatably supported, a motor 33a for rotating the arm 34, a gear 33b mounted on an output shaft of the motor 33a, an encoder 33c for detecting a rotation angle of the arm 34, and an encoder 33c. A rotation plate 34d of the arm 34 is rotated by a gear 33b, and the rotation angle is detected by an encoder 33c.

The arm 34 has the above-mentioned rotating shaft 34a,
A connection portion 34b for the arm 36 and the auxiliary cylinder 35 to be connected next is provided at a position facing the rotation shaft 34a. A motor 34c for rotating the auxiliary cylinder 35, a gear 34d, and an encoder 34e for detecting a rotation angle of the auxiliary cylinder 35 are provided on the connecting portion 34b.

A vertical shaft 36a of an arm 36 is inserted into the auxiliary cylinder 35 so as to be vertically movable and co-rotatable. A gear 35b meshing with a rack formed on the vertical shaft 35 and a gear 35b And an encoder 35c for detecting the vertical movement position of the vertical shaft 36a. Therefore, the arm 36 is connected to the arm 3
4, it moves up and down and turns, and its up and down movement position and rotation position are detected.

The arm 36 has the vertical shaft 36a,
A bearing portion 36b that rotatably supports the rotating shaft 37 of the holding unit 3 is provided at the position facing the bearing 36b. A motor 36c and a gear 36d for rotating the rotation shaft 37, an encoder 36e for detecting a rotation angle of the rotation shaft 37, and a mounting plate 36f for the encoder 36e are installed in the bearing portion 36b. .

The rotating shaft 37 is erected at the center of the lower surface of the dental medical instrument holding means 3, and the holding means 3 is
7, and the rotation angle is detected by the encoder 36e. Thus, according to this driving means, the X-axis position and the Y-axis position of the holding means 3 can be moved and held by the combination of the two horizontally rotating arms 34 and 36, By detecting the rotation angle and storing it in a storage unit described later,
The holding means 3 can be automatically moved to the stored X-axis position and Y-axis position.

Further, the Z-axis position of the holding means 3 can be moved and held by the auxiliary cylinder 35,
By detecting the Z-axis position and storing it in a storage unit described later, the holding unit 3 can be automatically moved to the stored Z-axis position. Further, the holding means 3 can be rotated by the rotation shaft 37 to hold the rotation position, and the rotation position (θ) is detected and stored in the storage means described later. The holding means 3 can be automatically rotated to the stored rotation position (θ).

FIG. 5 is a block diagram showing the configuration of the automatic control system of the dental care apparatus according to the present invention. This automatic control system
Only those relating to the driving means described above are extracted. This automatic control system includes a CPU which is a central control processing unit.
7, a patient table 1, an operator's chair 2, a dental medical instrument holding means 3, an illuminating device 4, a storage means 5, and a holding means automatic position setting switch 6 connected thereto. . In addition, here, for example, a device for controlling the medical table is shown as a patient medical table 1.

The patient couch 1 has a driving means 13 for tilting the back plate 11 (see FIG. 1), a position detecting means 14 for detecting the tilt angle, a driving means 15 for raising and lowering the couch 1 itself, and A position detecting means 16 for detecting a vertical position is provided. The operator's chair 2 has position detecting means 21
And an upright position sensor 22. As described above, the position detecting means 21 adjusts the relative position of the operator's chair 2 with respect to the patient's examination table 1, that is, the angle of the operator's chair 2 around the oral cavity of the patient. Dial notation, 9
It is to detect which position is from 12:00 to 12:00. The standing sensor 22 detects whether or not the operator O is sitting on the chair 2. However, the standing sensor 22 may be constituted by a pressure sensor or the like provided on the chair 2. Alternatively, a photoelectric sensor or the like for detecting the head of the operator O at a predetermined position may be provided at a predetermined height.

The dental medical instrument holding means 3 includes a driving means 3
1 and a position detecting means 32 are provided. For example, in the apparatus shown in FIG. 4, the driving means 31 is installed on a support block 33, two arms 34 and 36 which rotate horizontally, an auxiliary cylinder 35 for moving the arm 34 up and down, and an arm 36. It comprises a rotating shaft 37 for rotatably supporting the medical instrument holding means 3, a motor and gears attached thereto, and the position detecting means 32 includes an encoder 33 c provided on each movable portion, 34e, 35c, 36
e.

The illuminating device 4 is provided with a driving means 43 for freely moving and holding the position of the illuminating device 4, rotating the illuminating angle to a desired angle, and holding the illuminating angle, a position for detecting the position and the angle. Detecting means 44 and, further, turning on / off means 45 for turning on and off the lighting device 4 are provided. The driving means 43 and the position detecting means 44 correspond to the illumination arm 41 and the support block 4 described with reference to FIGS.
2 built in.

The storage means 5 stores variable information for controlling the entire dental care apparatus in a rewritable manner and in a manner capable of holding the information even when the power is turned off. EEPROM for storing and holding data
It is good to consist of. This EEPROM is an electrical
ly Erasable Programmable ROM is a ROM that can electrically erase and write specific data any number of times.

The storage means 5 stores, for example, a patient set in correspondence with the operator O's 12 o'clock position [1], 10 o'clock position [2], and 9 o'clock position [3]. Optimal corresponding positions [1], [2], [3] of the medical examination table 1, the dental treatment instrument holding means 3, the lighting device 4, etc. are stored and stored. The holding means position automatic setting switch 6 is connected to the operator's chair 2 described above.
, That is, a switch for starting the automatic movement mode of the patient's medical table 1, the dental medical instrument holding means 3, and the lighting device 4 corresponding to the position of the operator O to the corresponding optimum position.

The holding means position automatic setting switch 6 is
It can be provided at a position convenient for the operator's operation, for example, on the upper portion of the back plate 11, or on the side portion, a foot switch, and the like. The switch operation detection method is also a conventional switch that physically detects a switch operation, Alternatively, in addition to a pressure-sensitive switch, a touch panel, etc., using a photoelectric sensor, switch operation detection by blocking the light, using a voice sensor, when the operator issues a predetermined voice, for example, "table movement" etc. Alternatively, a device that determines this as a switch operation may be used.

According to such a control system, as described above, by operating the holding means position automatic setting switch 6, the position of the operator's chair 2 is detected, and the position of the operator O is determined.
Based on this, the device related to the corresponding optimum position held in the storage means 5 can be automatically moved. When the automatic setting switch 6 is not operated, the automatic movement of the related equipment is not performed regardless of the position of the operator's chair 2 at any position. Therefore, when the surgeon temporarily changes the position due to another task, the change is detected and the related devices are not automatically moved, so that the operation is safe.

FIGS. 6A, 6B and 6C are conceptual diagrams showing an example of the position detecting means of the present invention. FIG. 6 (a)
The position detecting means is shown in the case where the operator's chair is of a type that rotates with a constant radius with respect to the patient couch. The operator's chair 2 includes a rotation shaft 2 that supports the chair 2 so that the chair 2 can rotate.
a, and the rotating shaft 2a is rotated at a predetermined radius around a slightly lower position in the widthwise center of the oral cavity of the patient in the supine position, that is, the center of the headrest 11a erected on the back plate 11. And a chair rotation bearing 2c provided on the floor to support the rotation center of the rotation arm 2b.

The position detecting means 21 is provided inside the chair turning bearing 2c, and detects the turning angle of the turning arm 2b and the encoder 21a.
And a mounting plate 21a for supporting the According to such a position detecting means 21, the position of the operator's chair 2 relative to the patient's treatment table 1, that is, the position of the operator's chair 2 relative to the position of the oral cavity of the patient, causes the operator's chair 2 to move from 9:00 to 12:00. The position can be easily and definitely detected.

Also, the operator's chair 2 should be placed at a position where the rotating arm 2b does not interfere with the legs of the operator.
An upright position sensor 22 is provided. This standing position sensor 22
Can be configured to detect the stress or strain of the rotating arm 2b when the operator is seated and when the operator is not seated using a stress-strain sensor, for example.

In this manner, the standing sensor 22 can detect whether the operator is seated or not. FIG. 6B shows a position detecting means using wireless communication in a case where the operator's chair moves freely. In this case, the operator's chair 2A is rotatably supported by a support shaft 2Aa, and the support shaft 2Aa is fixed to a leg 2Ab provided with a free caster, and can freely move on the floor.

The position detecting means 23 includes a transmitting section 23a provided below the leg 2Aa, a receiving section 23b for receiving a position signal from the transmitting section 23a by radio, and analyzing the position signal. , Operator's chair 2A for patient couch
And a CPU 7A for detecting the relative position of. In this case, a CPU such as a personal computer may be separately used only for position detection, or a CPU controlling the entire dental care apparatus may be shared.

In this way, the relative position of the operator's chair with respect to the patient's treatment table can also be detected by such position detecting means 23. In addition, since the operator's chair that moves freely does not have signal wiring, it does not hinder movement and is convenient, and there is no fear of breaking the wiring.
FIG. 6C shows position detecting means using a position detecting ball when the operator's chair moves freely.

In this case, the operator's chair 2B has a support shaft 2B.
The support shaft 2Ba is rotatably supported by a, and is fixed to a leg 2Bb provided with a free caster, and can freely move on the floor. The position detecting means 24 includes a case body 24a provided below the leg 2a, a position detecting ball 24b rotatably provided in a lower opening of the case body 24a in all directions, and a ball 24b. A pair of columnar position reading rolls 24c, which are always in contact with the ball and co-rotating when they rotate in contact with the floor,
24d.

The position reading rolls 24c, 24d
Are provided such that their rotation axes are orthogonal to each other, whereby the position of the operator's chair can be detected by the same principle as that of a mouse used as position detection means (pointer) of a personal computer. Can be. The signal from the position detecting means 24 is processed by a signal processing circuit provided separately or by a CPU which controls the entire dental treatment apparatus, and the relative position of the operator's chair 2A with respect to the patient treatment table is detected. can do.

According to this method, the position of the operator's chair can be detected with a simple structure, and the cost can be reduced. FIG. 7 is a conceptual diagram showing a configuration of an example of the position holding unit of the dental care device of the present invention. This position holding means has the same basic structure as the driving means described with reference to FIG. 4, but a motor, a gear, an encoder, etc. are not installed in each movable part, but a stable holding position setting means is installed instead. The difference is that the movement of the dental care instrument holding means is performed manually. Also, as described with reference to FIG. 4, there are various types of position holding means, such as the installation position of the base end, the number of arms, and the moving direction of each movable part.

This position holding means is provided on the treatment table base 12.
(See FIGS. 2 and 3 (b).)
1. Two arms 82 and 84 that rotate horizontally and an arm 8
An auxiliary cylinder 83 for moving the 4 up and down, and a rotating shaft 85 that is installed on the arm 84 and rotatably supports the dental medical instrument holding means 3. The support block 81 rotatably supports the arm 82 and stably holds the arm 82 at a settable predetermined rotation position.
1 is provided.

The stable holding position setting means 91 is provided at a setting cylinder 91a fixed to the vertical position and rotatably inserted into the support block 81, and at a setting cylinder installation portion of the support block 81. A setting cylinder lock screw 91b for locking the rotation of the setting cylinder at a desired position, and a latch means 91c provided at an appropriate position on the outer periphery of the setting cylinder 91a from the outer periphery to the inner periphery. This latch means 91c
For example, a push screw-like plunger having a built-in ball urged by a spring or the like at its tip may be used.

The rotation axis 8 of the arm 82 is provided on the setting cylinder 91a.
2a is rotatably inserted, and a stable groove 82b having a substantially triangular cross section with a predetermined depth is provided on the outer periphery of the rotating shaft 82a in the axial direction. Therefore, when the arm 82 is manually rotated, the latch means 91
c is locked by the bias of the spring, and the arm 82
Is stably held at the rotational position.

In this stable holding rotation position, the lock of the setting cylinder lock screw 91b that locks the rotation of the setting cylinder 91a is released when the stability groove 82b of the arm 82 is locked by the latch means 91c. , Manually, arm 8
2 and the setting cylinder 91a are rotated by co-rotation,
When the stable holding rotation position becomes the optimum position corresponding to the operator's chair, the setting tube lock screw 91b is tightened again to lock the rotation of the setting tube 91a. A stable holding rotation position of the arm 82 that reproduces the optimal position corresponding to the position of the chair for the operator is set.

In this way, the stable holding position setting means 9
After setting the stable holding rotation position of the arm 82 that reproduces the corresponding optimum position by 1, when the arm 82 is not at the stable holding rotation position, the arm 82 is slightly moved toward the stable holding rotation position. When the manual operation is performed, the arm 82 is rotated to a position where the stability groove 82b of the arm 82 is locked by the latch means 91c, and the arm 82 is stably held at the corresponding optimum position.

In this case, the stable groove 82b does not have a shape extending in the axial direction.
The portion abutting on 2a may be formed in a conical shape. Further, although the case where the stable holding position set by the stable holding position setting means 91 is one place is described here, a plurality of places can be set, and an example thereof will be described later.

The arm 82 has the rotation shaft 82a,
A connection portion 82c for the arm 84 and the auxiliary cylinder 83 to be connected next is provided at a position facing the rotation shaft 82a. An auxiliary cylinder 83 is rotatably supported on the connecting portion 82c with the vertical position fixed.
a is inserted into the setting cylinder 92a of the stable holding position setting means 92 provided in the connecting portion 34b, and its small diameter portion 83a
A stable groove 83b similar to that provided on the rotation shaft 82a of the arm 82 is formed on the outer circumference of the arm 82.

The stable holding position setting means 92 is, like the stable holding position setting means 91, provided with the setting cylinder 92.
a, a setting cylinder lock screw 92b, and a latch means 92c, and cooperates with the stability groove 83b of the auxiliary cylinder 83 to set the optimum position corresponding to the position of the operator's chair in the same manner as the stable holding position setting means 91. The stable holding rotation position of the auxiliary cylinder 83 to be reproduced can be set.

The auxiliary cylinder 83 has a stable holding position setting means 93 for supporting the arm 84 so as to be vertically movable and for stably holding the arm 84 at a settable predetermined vertical position.
The stable holding position setting means 93 has the same basic structure as the stable holding position setting means 91, 92, but differs in that the stable holding position can be set not in the rotating position but in the vertical position.

That is, the stable holding position setting means 93 is a setting cylinder 93a which is inserted into the auxiliary cylinder 83 so as to be movable up and down.
A setting cylinder lock screw 93b provided at a setting cylinder installation portion of the auxiliary cylinder 83 to lock the vertical position of the setting cylinder 93a at a desired position, and further, in an appropriate position on the outer periphery of the setting cylinder 93a, from the outer periphery to the inner periphery. It is composed of latch means 93c provided.

The vertical axis 8 of the arm 84 is provided on the setting cylinder 93a.
4a are inserted so as not to rotate relative to each other and to be vertically movable. Such engagement can be realized, for example, by forming the upper and lower shafts 84a by square axes and making the insertion hole of the auxiliary cylinder 83 into a corresponding square shape as shown in the figure. On one surface of the vertical shaft 84a, a stabilizing groove 84b having a substantially conical cross section is provided at a portion where the latch means 93c abuts. Therefore, when the arm 84 is manually moved up and down, the tip of the latch means 93c is locked by the spring in the stable groove 84b, and the arm 84 is stably held at the up and down position.

At the lower end of the vertical shaft 84a of the arm 84, the dental medical instrument holding means 3 connected to the arm 84, the rotating shaft 85, the stable holding position setting means 94 for the rotating shaft, and the An urging means 84d is provided for urging the arm 84 so that the arm 84 can be moved lightly up and down manually against the weight of the arm 84 itself. This urging means 84d
Is a receiving cover 82 provided on the connecting portion 82c of the arm 82.
Since the arm 84 is urged against the arm 82, the arm 84 can be manually moved to the stable holding vertical position as described above.

In this stable holding up / down position, the lock of the setting cylinder lock screw 93b that locks the vertical movement of the setting cylinder 93a is released while the stability groove 84b of the arm 84 is locked by the latch means 93c. The arm 84 and the setting cylinder 93a are manually moved up and down by moving the arm 84 and the setting cylinder 93a up and down. When this stable holding vertical position becomes the optimal position corresponding to the operator's chair, the setting cylinder lock screw 93b is again set.
To lock the vertical movement of the setting cylinder 93a, the stable holding vertical position of the arm 84 that reproduces the optimal position corresponding to the position of the operator's chair at that time is set.

In this way, the stable holding position setting means 9
2, the stable holding rotation position of the auxiliary cylinder 83 for reproducing the optimum position corresponding to the position of the operator's chair is set, and the optimum position corresponding to the position of the operator's chair is set by the stable holding position setting means 93. After setting the stable vertical position of the arm 84 to be reproduced, the arm 84 is
When the arm 84 is not at these stable holding positions, if the arm 84 is slightly manually operated so as to move to the stable holding position, the stable groove 84b of the arm 84 is latched by the latch means 93c. The auxiliary groove 83 b is moved up and down to the position where it is locked.
By pivoting to the position locked at 2c, the arm 84 is stably held at its corresponding optimum position.

The arm 84 has the vertical shaft 84a,
A bearing portion 84c that rotatably supports the rotating shaft 85 of the holding means 3 is provided at the position facing the bearing 84c. The bearing portion 84c is provided with a stable holding position setting means 94 for rotatably supporting the turning shaft 85 and for stably holding the holding means 3 at a settable predetermined turning position. This stable holding position setting means 94 is, like the stable holding position setting means 91 provided on the support block 81, a setting cylinder 94a.
And the setting cylinder lock screw 94b and the latch means 94c, and cooperate with the stability groove 85a of the rotating shaft 85 to cope with the dental medical instrument holding means 3 in the same manner as the stable holding position setting means 91, 92 and the like. A stable holding rotation position that reproduces the optimum position can be set.

Thus, according to the position holding means provided with these stable holding position setting means 91, 92, 93, 94, the dental medical instrument holding means 3 can be operated by a slight manual operation of the operator's chair. It can be moved to the corresponding optimum position corresponding to the position and stably held. In this example, the arm 82 and the auxiliary cylinder 83 constitute a combination of the X-axis and Y-axis single-position holding means of the dental treatment instrument holding means 3, each of which has a stable holding position. Setting means 91 and 92 are provided. Also, arm 8
The upper and lower shafts 84a and the like 4 constitute a single Z-axis position holding unit of the holding unit 3, and a stable holding position setting unit 93 is provided. Further, the rotation shaft 85 constitutes a single position holding means for the rotation (θ) of the holding means 3, and is provided with a stable holding position setting means 94.

8 and 9 show another example of the stable holding position setting means of the position holding means. FIG. 8A is a perspective view of the stable holding position setting means with respect to the rotation, and FIG. FIG. 9A is a perspective view of a stable holding position setting means for vertical movement, and FIG. 9B is a sectional view of a main part thereof. This stable holding position setting means is characterized in that a stable holding position for a plurality of positions can be set with one position setting means, compared to the stable holding position setting means described with reference to FIG. First, an example of the stable holding position setting means for rotation will be described.

The stable holding position setting means shown in FIGS. 8A and 8B is attached, for example, instead of the stable holding position setting means 91 provided between the support block 81 and the arm 82 described with reference to FIG. , A plurality of latch means having different positions on the circumference can be attached so as to be settable. The stable holding position setting means 95 includes a setting cylinder 95a provided with an adjustment slot 95b, a mounting plate 95c for mounting the latch 95d, a latch 95d, and a mounting plate 95c.
And a mounting plate lock screw 95e for positioning and locking.

The setting cylinder 95a is provided with the stable holding position setting means 9
1 is different from the first setting cylinder 91a in that an adjusting slot 95b is provided, and a mounting portion 95ba for accommodating the mounting plate 95c so as to be rotatable around the rotation shaft 86a is provided.
The rotation is locked by a setting cylinder lock screw (not shown) similar to the above. A latch means 95d is provided on the mounting plate 95c so that a latch mechanism acts on the rotation shaft 86a.
The mounting plate lock screw 95e is screwed into the side accommodated in the through an adjustment slot 95b.

The latch means 95d is similar to the latch means 91c of the stable holding position setting means 91. The mounting plate lock screw 95e is screwed into the mounting plate 95c via the adjusting slot 95b, and fixes the mounting plate 95c to the setting cylinder 95a at an arbitrary position of the adjusting slot 95b. . The rotation shaft 86a is the same as the rotation shaft 82a of the arm 82 in FIG. 7, and has the same stability groove 86b.

The adjusting slot 95b, the mounting plate 95c, the latch means 95d, and the mounting plate lock screw 95e are:
Two of them are provided, and when distinguishing each, "# 1" and "# 2" are added to the end of the reference numerals. According to such a stable holding position setting means 95,
First, one of the mounting plates 95c, for example, the mounting plate 95c
# 1 is attached to the mounting plate lock screw 95e # 1 to adjust the elongated hole 95b.
Locking at an appropriate position of # 1 and fixing the mounting plate 95c # 1 at the rotational position with respect to the setting cylinder 95a, in this state, the latch means 95d # 1 and the stable groove 86b of the rotating shaft 86a are engaged. In the same manner as described with reference to FIG. 7, for example, a first stable holding rotation position that reproduces the corresponding optimum position of the rotation shaft 86a is set in correspondence with the operator's sitting position at 12 o'clock.

Next, with the setting cylinder 95a locked in rotation, the latch means 95d # 1 and the stable groove 8 of the rotation shaft 86a are locked.
The engagement with the shaft 6b is released, and the rotating shaft 86a is rotated to the corresponding optimum position corresponding to, for example, the 10 o'clock position of the operator. In this state, the mounting plate 95c # 2 provided with the latch means 95d # 2 is rotated along the adjustment slot 95b # 2, and the latch means 95d # 2 and the stable groove 8 of the rotation shaft 86a are rotated.
6b, the mounting plate 95c # 2 is adjusted by the mounting plate lock screw 95e # 2 at the pivot position.
When locked with respect to 5b # 2, the second stable holding rotation position of the rotation shaft 86a that reproduces the corresponding optimal position corresponding to the 10 o'clock position of the operator's sitting position is set.

As described above, according to the stable holding position setting means 95, the stable holding rotation position can be set with respect to the two corresponding optimum positions. Next, a description will be given of a stable holding position setting means capable of setting a plurality of stable holding positions in the vertical position. FIG. 9 (a),
The stable holding position setting means (b) is attached, for example, instead of the stable holding position setting means 93 provided between the support auxiliary cylinder 83 and the arm 84 described with reference to FIG. It is designed to be attached at a plurality of positions and position setting possible.

The stable holding position setting means 96 includes a setting cylinder 96a provided with an adjusting slot 96b, a mounting plate 96c for mounting the latch means 96d, a latch means 96d, and a mounting plate 96.
It is composed of a mounting plate lock screw 96e for positioning and locking c. The setting cylinder 96a is different from the setting cylinder 93a of the stable holding position setting means 93 in that an adjusting slot 96b is provided with an accommodation portion for accommodating the mounting plate 96c in a vertically movable state in contact with the vertical shaft 87a. Different, setting cylinder 93
The vertical movement is locked by a setting cylinder lock screw (not shown) similar to a.

A latch means 96d is provided on the mounting plate 96c.
A latch mechanism is provided to act on the vertical shaft 87a,
Further, a mounting plate lock screw 96e is screwed into the setting tube 96a through the adjustment slot 96b on the side accommodated in the accommodation section. The latch means 96d is similar to the latch means 93c of the stable holding position setting means 93. The mounting plate lock screw 96e is screwed into the mounting plate 96c via the adjusting slot 96b, and fixes the mounting plate 96c to the setting cylinder 96a at an arbitrary vertical position of the adjusting slot 96b. is there.

The vertical shaft 87a is the same as the vertical shaft 84a of the arm 84 in FIG.
It differs in that it is provided so as to surround the outer periphery of the vertical shaft 87a. It should be noted that the vertical axis 87a is a round axis, as compared to the vertical axis 84a in FIG. 7 which is a square axis, but this is for convenience of explanation. The adjusting slot 96b, the mounting plate 96c, the latch means 96d, and the mounting plate lock screw 96e are also similar to the stable holding position setting means 95,
Two of them are provided, and when distinguishing each, "# 1" and "# 2" are added to the end of the reference numerals.

According to the stable holding position setting means 96, the stable holding position setting means 95 can be stably held at the two types of optimally corresponding vertical positions in the same manner as the stable holding position setting means 95 for rotation. The vertical position can be set. In other words, according to this stable holding position setting means, the operator's sitting position determined at the operator's chair is 12:00, sitting position 10:00, sitting position 9 o'clock, standing position 9 o'clock, etc. The stable holding position can be set.

FIGS. 10 (a) to 10 (c) and FIGS.
(F) and FIGS. 12 (g) to (j) are conceptual views showing various examples of the mounting position of the driving means or the position holding means of the dental care instrument holding means of the present invention. (A) is attached to the operator side under the treatment table, and is the same as that described in FIGS. (B) is attached to the assistant side below the treatment table. In this case, an arm for straddling the treatment table is further required. (C) is a type attached to a back plate. (D) is the one standing on the operator side of the floor,
(E) shows this on the assistant side.

(F) is a type in which the dental treatment instrument holding means 3 is accommodated in a side cabinet. This side cabinet is, for example, a POS (Patient Orien
ted System) Cabinet with a sterilizer inside. In this case, the dental medical instrument holding means 3 determines the end of treatment based on the position of the operator's chair by operating the holding means position automatic setting switch, and is automatically housed in the side cabinet. May be applied.

(G) is provided together with the lighting device support means, and is mounted on a wall, (h) is also a ceiling hanging type, (i) is a stand pole type,
(J) is a type installed on a pole connecting the floor and the ceiling. Regardless of the mounting position and the mounting method, the driving means or the position holding means of the dental care instrument holding means of the present invention exerts its effect.

[0088]

According to the dental medical device of the present invention, the dental medical device holding means for mounting or locking a dental medical device such as a handpiece, a so-called tray table, is used as the holding device position automatic setting switch. The operation automatically shifts the dental treatment instrument holding means to the operator's chair, that is, the position where the operator is most comfortable to use, corresponding to the position of the operator at that time, so that the operator can move accurately and quickly with a constant movement. It is very convenient for dental practice. Also,
Since there is no need to operate a plurality of selection switches, there is no mistake in selection, the patient is not unnecessarily changed in posture, and the burden on the patient is reduced.

[0089] According to the dental medical device of the second aspect,
In addition to the effects of the dental care device according to claim 1, the position of the operator's chair is detected by detecting the relative position with respect to the patient's couch on which the patient is held. It is possible to accurately and easily detect the position of the operator as a reference, that is, the above-mentioned positions such as 12:00 and 9:00.

According to the dental medical treatment device of the third aspect,
In addition to the effects of the dental care device according to any one of claims 1 and 2, furthermore, the up and down movement of the patient couch and tilting of the back plate related to the dental care are the optimal position movement determination criteria for the operator. Since the movement is automatically performed based on the position of the chair, the movement can be performed without error and the convenience is good. According to the dental care apparatus according to the fourth aspect, in addition to the effects of the dental care apparatus according to any one of the first to third aspects, the movement and turning on / off of the lighting device related to the dental care are also optimized. Since the operation is automatically performed based on the position of the operator's chair, which is a position movement determination reference, a setting without error is made and convenience is good.

[0091] According to the dental medical device of the fifth aspect,
A feature of the dental care apparatus according to claim 1, wherein the position movement determination is performed based on the position of the operator's chair, which is applied to the position holding means of the manually movable dental care tool holding means, and the latch means By means of a stable holding position setting means using a tool or the like, the dental care instrument can be held with a slight manual operation to the optimum corresponding position based on the position of the operator's chair, which is the optimum position movement judgment standard, without using automatic means. The means can be moved, which is convenient.

[0092] The dental care apparatus according to the sixth aspect has the effect of the dental care apparatus according to the fifth aspect, and furthermore, the position holding means and the stable holding position setting means according to the fifth aspect can be more specifically used in a dental care apparatus. Since it is defined corresponding to the moving direction of the instrument holding means, it is possible to easily realize a dental care apparatus which exhibits the effect of claim 5.

[Brief description of the drawings]

FIG. 1 is a view conceptually showing a corresponding optimum position corresponding to a position of an operator's chair in an example of the dental care apparatus of the present invention. FIG. 1 (a) shows a case where the operator is in a sitting position of 12:00. (B) is a plan view of the corresponding optimum position [2] when the operator is at the 10 o'clock sitting position.

FIG. 2 conceptually shows a corresponding optimum position [1] when an operator is at a sitting position of 12 o'clock in an embodiment of the dental care apparatus of the present invention. (B)
Is its side view

FIG. 3 conceptually shows a corresponding optimum position [3] when the operator is in a standing position in the embodiment of the dental care apparatus of the present invention, wherein (a) is a plan view thereof; b) is a side view

FIG. 4 is a conceptual diagram showing a configuration of a driving unit of the dental care instrument holding unit of the present invention.

FIG. 5 is a block diagram showing a configuration of an automatic control system of the dental care apparatus of the present invention.

FIGS. 6A, 6B and 6C are conceptual diagrams showing examples of position detecting means of the present invention.

FIG. 7 is a conceptual diagram showing a configuration of a position holding unit of the dental care apparatus of the present invention.

8A and 8B show another example of the stable holding position setting means of the position holding means, wherein FIG. 8A is a perspective view of the stable holding position setting means with respect to rotation, and FIG.

9A and 9B show another example of the stable holding position setting means of the position holding means, wherein FIG. 9A is a perspective view of the stable holding position setting means with respect to vertical movement, and FIG.

10 (a) to 10 (c) are conceptual views showing various examples of mounting positions of a driving unit or a position holding unit of the dental care device holding unit of the present invention.

FIGS. 11 (d) to (f) are conceptual views showing various other examples of mounting positions of the driving means or the position holding means of the dental care instrument holding means of the present invention.

FIGS. 12 (g) to (j) are conceptual views showing various other examples of mounting positions of the driving means or the position holding means of the dental care instrument holding means of the present invention.

FIG. 13 shows an example of a conventional dental care device.
(A) is a plan view thereof, and (b) is a side view thereof.

[Explanation of symbols]

 C Patient O Surgeon T Dental medical instrument [1], [2], [3] Optimal corresponding position 1 Patient medical table 11 Backboard 2 Operator's chair 21 Position detecting means 3 Dental medical instrument holding means 31 Driving means 4 Illumination device 5 Storage means 6 Holding means automatic position setting switch 8 Position holding means 9 Stable holding position setting means 10 Dental care device

Claims (6)

[Claims] 1. A dental treatment apparatus comprising: a patient table for holding a patient in a sitting position or a supine position; a chair for an operator; and a dental treatment device holding means for mounting or locking a dental treatment device. Driving means for moving the dental care instrument holding means to an arbitrary position, storage means for storing the position of the dental care instrument holding means, and position detecting means for detecting the position of the operator's chair,
A holding means position automatic setting switch, wherein when the holding means position automatic setting switch is operated, the position of the operator's chair detected by the position detecting means is corresponded and stored in the storage means in advance. A dental care device, wherein the dental care device holding means is automatically moved to an optimal position. 2. The dental care apparatus according to claim 1, wherein the position detection means of the operator chair detects a relative position of the operator chair with respect to the patient table. 3. The method according to claim 1, wherein when the holding means position automatic setting switch is operated, the position of the operator's chair detected by the position detecting means is further adjusted. A dental medical treatment apparatus characterized in that the patient medical table is moved up and down and / or its back plate is tilted to a corresponding optimum position stored in a storage means in advance. 4. The apparatus according to claim 1, wherein when the holding means position automatic setting switch is operated, the position of the operator's chair detected by the position detecting means is automatically adjusted. And moving the lighting device of the patient's clinic table and / or turning on / off the light to the corresponding optimum position stored in the storage means in advance. 5. A dental treatment apparatus comprising: a patient table for holding a patient in a sitting position or a supine position; a chair for an operator; and a dental treatment device holding means for mounting or locking a dental treatment device. The position holding means for holding the dental care instrument holding means at an arbitrary position includes a stable holding position setting means for setting a stable holding position with respect to the movement of the dental care tool holding means. A dental care apparatus characterized in that a stable position is selectively held at a predetermined corresponding optimum position previously set by the stable holding position setting means in correspondence with an operator's chair by an operation. 6. The dental medical instrument holding means according to claim 5, wherein said position holding means is an X-axis and a Y-axis.
Axis, Z-axis, rotating single position holding means, or any combination thereof, and the stable holding position setting means is provided corresponding to each single position holding means. A dental care device characterized by the above.