JP2003265552A - Medical chair unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus capable of easily performing the illumination of a condensing illuminator by together using manual and automatic operations in order to solve the problem that the setting of the illumination position of the condensing illuminator of a medical chair unit is troublesome because manually performed each time heretofore. <P>SOLUTION: The medical chair unit is equipped with an illumination mechanism comprising a light pole for manually setting the operation of the condensing illuminator of the medical chair unit in all of up and down, left and right and oblique illumination directions, the articulated arm horizontally protruded from the region above the light pole, a light support arm downwardly movable from the leading end of the articulated arm, a sensor for measuring the angle of inclination of the light support arm, the spherical ultrasonic motor arranged to the leading end of the light support arm operated in connection with the angle of inclination and the condensing illuminator directly connected to the leading end of the shaft of the motor. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concentrating illuminator for a dental chair unit and other medical chair units, and more particularly to a illuminating direction specified by the spherical ultrasonic motor for manually determining the illuminating direction of the affected part. The present invention relates to a joint arm and a medical chair unit that can be automatically set in association with a set angle between the multi-joint arm and the light support arm and a fine adjustment angle of a backrest.

[0002]

2. Description of the Related Art Conventionally, the illuminating range of a concentrating illuminator of a medical chair unit for dentistry or the like is to illuminate an affected part of a patient as a spot (concentrated illuminating), so that the concentrating illuminator corresponds to the control posture of the chair. The position of the equipment was manually adjusted each time.

[0003]

However, it is complicated to set the illuminating posture of the condensing illuminator each time. The present invention uses both manual and automatic operation of the light of the concentrating luminaire,
Provide a device that can be easily operated.

[0004]

In view of the above, the inventors of the present invention have solved this problem by the following means as a result of earnest experimental research. (1) Upward, downward, leftward, rightward, and diagonal all illumination directions in a concentrating lighting fixture of a medical chair unit are operated by a light pole and a horizontal multi-joint arm projecting horizontally from above the light pole, and the multi-joint arm. A light support arm attached to the tip of the light support arm and movable downward, a spherical ultrasonic motor disposed at the tip of the light support arm, and a light collector directly connected to the tip of the shaft of the spherical ultrasonic motor. A first angle sensor for detecting a set angle arranged between the horizontal articulated arm and the light support arm and transmitting a signal; and a small backrest of the chair unit. Second, which detects the adjustment angle and sends a signal
Of the angle sensor, and a control computer for converting into a drive signal of the spherical ultrasonic motor by a signal from each of the sensors. According to a control signal sent from the control computer, as a first step, The spherical ultrasonic motor is driven by the detection signal of the angle sensor No. 1 to determine the illumination setting angle, and as a second step, the spherical angle is further detected by the detection signal of the second angle sensor of the backrest arranged in the chair unit. Equipped with a drive circuit for driving the ultrasonic motor to set the fine adjustment set angle, and
A medical chair unit, characterized in that the concentrating luminaire comprises a braking mechanism that stops after control of each step is completed.

(2) The spherical ultrasonic motor has three stators, and the rotor operates in a stable and wide range in three arbitrary X, Y and Z directions (1). The medical chair unit described in. (3) A measuring mechanism for measuring the distance between the condensing lighting device and the exposed face of the patient's face on the headrest of the chair unit or the facerest exposed part of the face-adjacent part (1) or ( The medical chair unit described in 2). (4) Any one of (1) to (3), characterized in that the medical chair unit is a dental chair unit.
The medical chair unit according to the item. (5) The medical chair according to any one of (1) to (4), characterized in that the control mechanism releasing means is provided so that the condensing lighting fixture can be manually controlled when necessary. unit.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an external appearance of a dental chair unit in which a light arm is manually set and a required position of a concentrating lighting fixture is set by a spherical ultrasonic motor. In the drawing, 1 is a chair unit, 2 is a light pole, and 2 is a light pole. ′ Is a rotation direction, 3a and 3b are movable horizontal arms, 4 is an angle sensor of the movable horizontal arm and the extension arm, 5 is an extension arm (light support arm), 5a is an arm in a tilted position, and 5b is an arm in a standing position. 5c is an arm position when leaving the seat, 6 is a spherical ultrasonic motor, 6a is a spherical ultrasonic motor in a tilted position, 6b is a spherical ultrasonic motor in a standing position, 6c is a position of the concentrating lighting fixture when leaving the seat, 7 is a concentrating luminaire, 7a is a concentrating luminaire in a tilted position, 7b is a concentrating luminaire in a standing position, 8 is a backrest,
8a is a backrest in a tilted position, 8b is a backrest in a standing position,
9 is a back angle sensor, 10 is a control computer,
11 is a headrest, 11a is a tilted headrest, 11b is a standing headrest, 12 is a bracket table, 13 is a seat portion, 14 is a spittoon, 15 is a foot operation device, 16 is a pedestal, 19 and 19a are moving. Rangefinder, 19b rangefinder, 20 extension arm tilt angle, 2
0a and 20b are the tilt angles of the arm when moving, 21 is the tilt angle of the spherical ultrasonic motor, 21a and 21b are the tilt angles of the spherical ultrasonic motor when moving, L is the distance between the concentrating lighting fixture and the headrest, 22 Is the supine backrest setting angle, 2
3 is a tilted backrest setting angle, 24 is a standing backrest setting angle, and 33 is a holder for a spherical ultrasonic motor.

As shown in FIG. 1, the movable horizontal arm 3 above the light pole 2 is first manually operated in the vertical, horizontal, and diagonal all illumination directions of the collective lighting fixture 7.
The extension arm 5 is moved via b and 3a, and the position of the spherical ultrasonic motor 6 disposed at the tip of the extension arm 5 is set to a position that matches each position of the headrest 11. Next, the set angle between the tip of the movable horizontal arm 3a and the extension arm 5 suspended downward therefrom is detected by the angle sensor 4 of the movable horizontal arm and the extension arm, which is the first angle sensor. And the inclination angle of the extension arm 20
Based on, the angle of the spherical ultrasonic motor 6 is set,
The illumination position of the condensing illumination device 7 of the medical chair unit 1 directly connected to the shaft is set to an appropriate position.

As a second angle sensor for detecting the set angle and the fine adjustment angle of the backrest and sending a signal, a backrest angle sensor 9 is provided at the base of the backrest 8, and the movable horizontal arm and In order to convert the drive signal of the spherical ultrasonic motor 6 by the detection signal from the angle sensor 4 of the extension arm and the drive signal of the spherical ultrasonic motor 6 by the fine adjustment angle signal from the backrest angle sensor 9, the bracket is used. A control computer 10 is arranged below the table 12 (FIGS. 1 and 5). Then, according to the control signal sent from the control computer 10, the spherical ultrasonic motor 6 is driven as a first step to determine the illumination angle of the concentrating lighting fixture 7, and the spherical ultrasonic motor 6 is driven as a second step. Each drive circuit, that is, an ultrasonic traveling wave excitation circuit (described later, FIG. 5) for setting the fine adjustment illumination angle is provided. Furthermore, the condensing lighting fixture 7 is provided with a braking mechanism that stops after the control of each step is completed.

Next, the operation will be described. Initially, the backrest 8
The setting position of is based on the supine position, and the backrest setting angle 22 in the supine position is A degrees. As shown in the drawing, at this time, the condensing lighting fixture 7 is set on a substantially vertical line of the headrest 11, and the distance L thereof is set to a position of about 60 cm. To meet the above conditions, the extension arm tilt angle 2
0 is B degrees forward with respect to the vertical line (FIG. 5), and the inclination angle 21 of the spherical ultrasonic motor is such that the base 33 is fixed to the extension arm 5 so that the base 33 is fixed to the holder 33 of the spherical ultrasonic motor. At B1 degrees (FIG. 5) behind the virtual extension line of the arm 5. Therefore, the relationship between the backrest setting angle A in the supine position, the inclination angle B of the extension arm and the inclination angle B1 of the spherical ultrasonic motor (FIG. 5) is known and constant, and therefore the extension arm 5 is movable. The drive signal may be sent from the control computer 10 to the spherical ultrasonic motor 6 according to the detection signals of the angle sensors 4 of the horizontal arm and the extension arm. Further, when the setting position of the backrest 8 is finely adjusted back and forth, a drive signal is similarly sent from the control computer 10 to the spherical ultrasonic motor 6 according to the detection signal from the backrest angle sensor 9,
The illumination angle of the collective lighting fixture 7 is finely adjusted.

Next, the backrest 8 when the backrest 8 is tilted
If the backrest setting angle 23 in the tilted position is set to A1 degree (FIG. 5), the concentrated lighting fixture 7a in the tilted position at this time is about 60 cm diagonally above the headrest 11a in the tilted position. In the position. To meet the above conditions,
The tilt angle 20a of the arm during movement of the extension arm 5 is B2 degrees forward with respect to the vertical line backward (FIG. 5), and the tilt angle 21a of the spherical ultrasonic motor during movement is B3 degrees forward with respect to the center line. (FIG. 5). Therefore, the relationship between the backrest setting angle A1 in the tilted position, the inclination angle B2 of the extension arm and the inclination angle B3 of the spherical ultrasonic motor is known and constant, so that the angle between the movable horizontal arm and the extension arm is constant. The drive signal may be sent from the control computer 10 to the spherical ultrasonic motor 6 according to the detection signal of the sensor 4. Further, when the setting position of the backrest 8 is finely adjusted back and forth, a drive signal is similarly sent from the control computer 10 to the spherical ultrasonic motor 6 by the detection signal from the backrest angle sensor 9, and the converging lighting fixture 7 is provided. Fine-tune the lighting angle of.

Next, the backrest 8 is placed on the backrest 8b when standing.
The backrest setting angle 24 of that standing position to A2
(FIG. 5) At this time, the concentrating lighting fixture 7 when standing up
b is about 60 in front of the headrest 11b when standing up.
It is in the position of cm. In order to satisfy the above condition, the inclination angle 20b of the extension arm at the time of movement is B ahead of the vertical line.
4 degrees (Fig. 5), tilt angle 2 of spherical ultrasonic motor during movement
1b is B5 degrees (FIG. 5) forward with respect to the front centerline. Therefore, the backrest setting angle A2 when tilted (Fig. 5)
And the inclination angle B4 of the extension arm and the inclination angle B5 of the spherical ultrasonic motor 6 are known and constant, the detection signal of the extension arm angle sensor 4
The drive signal may be sent from the control computer 10 to the spherical ultrasonic motor 6. Also, the backrest 8
In the case of finely adjusting the setting position of the front and back, similarly, a drive signal is sent from the control computer 10 to the spherical ultrasonic motor 6 according to the detection signal from the backrest sensor 9,
The illumination angle of the collective lighting fixture 7 is finely adjusted (FIG. 5 described later).
In the above example, the setting position of the backrest is roughly divided into three: supine position, tilted position, and standing position, but the position of the condensing lighting fixture 7 is set in the same manner at any intermediate position. can do.

FIG. 2 is an external perspective view of the spherical ultrasonic motor. In the figure, 25 is a stator, 26 is a rotor, 2
7 is a shaft, 33 is a spherical motor holder, X is the X axis,
Y represents the Y axis and Z represents the Z axis. The rotor 26 of the spherical ultrasonic motor 6 is structurally pressed by the stator 25 in three directions, and after the posture control is completed, the friction is applied to the rotor 26 to bring it into a stopped state. It is also possible to add a braking mechanism using a spring or magnetic force between the holder 33 of the motor and the rotor 26 so that the motor is actuated at the time of stop to ensure the stop (not shown).

Conventionally, a spherical ultrasonic motor driven by ultrasonic waves is known, but a spherical ultrasonic motor used in this case is disclosed in, for example, Japanese Unexamined Patent Publication No. 11-18459, "Spherical ultrasonic motor having a wide working area". ", The number of stators is three, and the rotor 26 operates stably and widely in any X, Y, and Z axis directions, and in particular, when each stator 25 rotates. The vector possessed is divided into three directions, and the combined vector that moves the rotor 26 matches the direction component required for movement, so there is no redundancy, the response to the input is uniform, the controllability is good, and the movement of the rotor 26 is stable. is doing. In addition, the space factor is good, and the structure is simplified, which is preferable.

FIG. 3 is a top view showing the external appearance of the dental chair unit in which the light arm is manually set and the respective required positions of the concentrating illuminator by the spherical ultrasonic motor are set. In the figure, 5c is the arm when leaving the seat. The position 6c indicates the position of the condensing lighting fixture when leaving the seat. After the medical treatment, the patient gets out of the chair to leave the chair, but at this time, it is necessary to change the position so that the condensing lighting device 7 does not become an obstacle. FIG. 3 shows an example of the position 5c of the extension arm 5 when leaving the seat, and the position 6c of the concentrating lighting fixture when leaving the seat. Although the position is changed to the left side of the chair in this example, the position may be changed to the upper position. In the case of this device, this operation is manual.

FIG. 4 is a side view of a chair unit in which a range finder is provided in the converging lighting device. In the figure, 19b is a rangefinder, and 19a and 19 are rangefinders when moving. For example, the range finder 19b is used to measure the distance between the light-collecting luminaire 7b when standing and the face of the patient or the exposed portion of the headrest 11b when standing adjacent to the face (L in FIGS. 1 and 4). As a medium for distance measurement, any means such as visible light, infrared rays, ultrasonic waves, magnetic force, and imaging camera may be used. The above measurement, as a sensor for detecting the change in the distance,
The output signal can be used for confirmation of the control result at the time of setting the position of the condensing lighting fixture 7 described above.

Further, the medical chair unit 1 is highly compatible with a chair unit for dental treatment. Then, the control of the concentrating lighting fixture 7 of the chair unit can be manually performed mainly by releasing the braking mechanism added when the spherical ultrasonic motor 6 is stopped, when necessary such as when the control mechanism is defective. it can.

FIG. 5 is a block diagram of the chair unit extension arm, backrest angle, and spherical ultrasonic motor operation. In the figure, 21 'is the tilt angle of the spherical ultrasonic motor during fine adjustment, 22' is the backrest angle during fine adjustment, 28,
28 'is a conversion circuit, 29 is a drive circuit, 30 is a first step switch, 31 is a second step switch, 32, 3
2'is a signal source, 34 is an operation switching unit, A, A1, A2
Is the angle of the backrest, B, B2, B4 are the operating angles of the extension arm, and B1, B3, B5 are the operating angles of the spherical ultrasonic motor. As described above, the backrest angles 22 to 24 (A to A2) of the chair unit are digitized by the backrest angle sensor 9 of the signal source 32, and first, for control via the first step switching 30 (SW2). It is sent to the computer 10 and is converted into a signal output for the three stator drive circuits 29 of the spherical ultrasonic motor 6 by the conversion circuit 28 therein.

Further, as described above, the inclination angles of the extension arm of the chair unit are 20 to 20b (B, B2, B4).
Is digitized by the angle sensor 4 of the movable horizontal arm and the extension arm of the signal source 32, and is first sent to the control computer 10 via the first step switching 30 (SW2), and the conversion circuit 28 therein. Are converted into signal outputs for the three stator drive circuits 29 of the spherical ultrasonic motor 6. Since the backrest setting angle of the signal source 32, the angle of the extension arm 5 and the working angle of the spherical ultrasonic motor 6 are known, the conversion circuit 28 converts them to the applicable angle signal, and finally the spherical ultrasonic wave. The shaft 27 of the rotor 26 of the sonic motor 6 is set to the required angle.

Similarly, the backrest angle 22 'during fine adjustment is also detected by the backrest angle sensor 9, and the drive circuit is driven by the conversion circuit 28' via the second step switching 31 (SW1) (30 at this time is interlocked with OFF). 29 and the inclination angle 2 of the spherical ultrasonic motor when finely adjusting the spherical ultrasonic motor 6
1'and the shaft 27 is set to the backrest angle 22 'at the time of fine adjustment. As well known as an “ultrasonic traveling wave excitation circuit”, the drive circuit 29 applies X-frequency to a piezoelectric element arranged on the back surface of each stator 25 by applying a high frequency voltage in a two-phase ultrasonic region, Y,
A traveling wave whose phase advances with time is excited on the surface of each stator of Z, and the rotor 26 in contact with the apex of this traveling wave rotates, so that a two-phase high-frequency current applied to each stator is controlled. As a result, the rotation speed, the generated torque, and the rotation direction of the rotor 26 can be changed.
Therefore, the shaft 27 of the rotor 26 can be set to the required angle by the drive circuit 29.

When the signal from the distance measuring device 19b is used, the setting value is set, for example, by the switching confirmation circuit 37 through the switch 35 (SW3) to the headrest 11b when the patient's face or standing position (FIGS. 1 and 4) described above is used. If the set distance L between the exposed portion of the above and the range finder 19b fluctuates due to a problem, this fluctuation signal can be detected, and the position setting of the converging lighting fixture 7 can be reliably performed based on the fluctuation signal. The operating angle of the spherical ultrasonic motor 6 corresponding to the setting according to the case of FIG. 4 is additionally shown on the left side of FIG.

According to the present invention, the following excellent effects are exhibited. 1. According to the invention of claim 1 of the present invention, a horizontal articulated arm for manually setting operation operations of up and down, left and right, and oblique all illumination directions in the concentrating lighting device of the medical chair unit, By setting the backrest setting angle based on the setting angle of the light support arm attached to its tip and the operation of the spherical ultrasonic motor, it can be executed with a simple structure that combines manual and automatic. With respect to the illumination setting, the position of the condensing lighting device corresponding to the control posture is manually adjusted on the chair in order to illuminate the affected area as a spot, but the complication can be eliminated. 2. According to the invention of claim 2, in addition to the effect of 1,
Since the spherical ultrasonic motor has three stators and the rotor operates stably and widely in arbitrary X, Y, and Z directions, it is efficient and can have a small structure.

According to the third aspect of the invention, in addition to the effect of the first or second aspect, between the concentrating lighting device and the exposed face of the patient's face on the headrest of the chair unit or the exposed face of the headrest adjacent to the face. Since the measurement mechanism for measuring the distance is provided, it is possible to reliably set the concentrating lighting fixture. According to the invention of claim 4 and claim 4, in addition to the above respective effects, the present invention is highly applicable to a chair unit for dental treatment and is useful. According to the fifth and fifth aspects of the present invention, in addition to the above respective effects, the control mechanism can be released when necessary, and the attitude control of the concentrating lighting fixture can be manually performed. Therefore, even when the control setting mechanism malfunctions, etc. , The medical treatment can be continued.

[Brief description of drawings]

FIG. 1 is a side view showing an external appearance of a dental chair unit in which a light arm is manually set and a spherical ultrasonic motor is used to set a required position of a focused illuminator.

FIG. 2 is a perspective view showing the appearance of a spherical ultrasonic motor.

FIG. 3 is a top view showing the external appearance of the dental chair unit in which the light arm is manually set and the required positions of the concentrating luminaire using the spherical ultrasonic motor are set.

FIG. 4 is a side view of a chair unit in which a range finder is provided in the concentrating lighting fixture.

FIG. 5: Extension arm of chair unit, back angle,
Block diagram of spherical ultrasonic motor operation

[Explanation of symbols]

1: Chair unit 2: Light pole 2 ': Direction of rotation 3a, 3b:
Movable horizontal arm 4: Angle sensor of movable horizontal arm and extension arm 5: Extension arm 5a: Arm in tilted position 5b: Arm in standing position 5c: Position of arm when leaving 6: Spherical ultrasonic motor 6a: Tilt position Spherical ultrasonic motor 6b: Spherical ultrasonic motor 6c when standing 6: Position of concentrated lighting fixture when leaving seat 7: Concentrated lighting fixture 7a: Concentrated lighting fixture when tilted 7b: Standing gathering device Light illuminator 8: Backrest 8a: Backrest in tilted position 8b: Backrest in standing position 9: Backrest angle sensor 10: Control computer 11: Headrest 11a: Headrest in tilted position 11b: Headrest in standing position 12: Bracket Table 13: Seat 14: Spitton 15: Foot operation device 16: Pedestal 19, 19a: Distance measuring device during movement 19b: Distance measuring device 20: Extension arm inclination angle 20a, 0b: Inclination angle of arm 21 during movement: Inclination angle of spherical ultrasonic motor 21a, 21b: Inclination angle of spherical ultrasonic motor during movement 21 ': Inclination angle of spherical ultrasonic motor during fine adjustment 21a, 21b: Inclination angle of spherical ultrasonic motor during movement 22: Backrest setting angle in supine position 22 ': Backrest angle during fine adjustment 23: Inclined backrest setting angle 24: Standing backrest setting angle 25: Stator 26: Rotor 27 : Shaft 28, 2
8 ': conversion circuit 29: drive circuit 30: first step switching 31: second step switching 32, 3
2 ': Signal source 33: Spherical ultrasonic motor holder 34: Operation switching unit 35: Switching 37: Confirmation circuits A, A1, A2: Backrest setting angles B, B2, B4: Extension arm inclination angles B1, B3 , B5: Inclination angle of spherical ultrasonic motor L: Distance between condensing lighting fixture and headrest X: X axis Y: Y axis Z: Z axis

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shinichi Nakayama             2-1-2 Kamiochiai, Saitama City, Saitama Prefecture             Morita Tokyo Manufacturing Co., Ltd. (72) Inventor Tatsuo Kobayashi             2-1-2 Kamiochiai, Saitama City, Saitama Prefecture             Morita Tokyo Manufacturing Co., Ltd. F-term (reference) 3K042 AA05 CB26                 4C052 AA06 GG01 GG11 GG24 LL07                       LL09                 4C341 MM11 MP06 MQ01 MR02 MR03                       MR13 MR15 MS04 MS18

Claims (5)

[Claims] 1. A light pole and a horizontal multi-joint arm projecting horizontally from above the light pole are used to operate the converging light fixture of a medical chair unit in all directions of up, down, left and right. Attached to the tip of the joint arm,
Illumination consisting of a light support arm movable downward, a spherical ultrasonic motor arranged at the tip of the light support arm, and a condensing lighting fixture directly connected to the tip of the shaft of the spherical ultrasonic motor. A first angle sensor provided with a mechanism for detecting a set angle arranged between the horizontal articulated arm and the light support arm and transmitting a signal; and a signal for detecting a fine adjustment angle of the backrest of the chair unit. Is provided with a second angle sensor and a control computer for converting the signals from the sensors into drive signals for the spherical ultrasonic motor, and the first control signal is sent from the control computer. As a step, the spherical ultrasonic motor is driven by the detection signal of the first angle sensor to determine a lighting setting angle, and as a second step, the light is distributed to the chair unit. By the second detection signal of the angle sensor of the backrest has, a drive circuit for setting the further the spherical ultrasonic fine adjustment setting angle by driving the motor,
A medical chair unit, characterized in that the condensing illuminator comprises a braking mechanism that stops after the control of each step is completed. 2. The spherical ultrasonic motor has three stators, and the rotor operates in a stable and wide range in three arbitrary X, Y and Z axes directions. The listed medical chair unit. 3. A measuring mechanism for measuring the distance between the concentrating illuminator and the exposed face of the patient's face on the headrest of the chair unit or the exposed face of the headrest. Or the medical chair unit according to 2. 4. The medical chair unit according to claim 1, wherein the medical chair unit is a dental chair unit. 5. The medical chair according to any one of claims 1 to 4, further comprising release means for the control mechanism so that the condensing lighting fixture can be manually controlled when necessary. unit.