JPH0751331A - Chair for dental treatment - Google Patents

Abstract

PURPOSE:To enable to place a patient's head in a correct position to take an X-ray photograph in dental treatment. CONSTITUTION:A measure for making revolution movement 11 is installed to rotate a main body of a chair 1. A measure for making back and forth direction movement to move a main body of chair 1 and a measure for making movement in the direction of right and left to move the main body of the right and left are installed. In addition to these, a measure for making tilting movement 46 to tilt a head rest 26, to the direction of 360 deg. is also installed. These moving measures 11, 27, 28, 46 are numerically controlled by a controlling apparatus. Because the main body of the chair 1 can be revolved, moved back and forth and also right and left by these arrangements, the patient can be moved to a fixed position and direction while he stays sitting. Furthermore, as the head rest 26 can be made move to a desired angle by the means for making tilting movement 46, the angle for taking photograph of the affected part can be accurately focused.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental treatment chair, and more particularly to a dental treatment chair suitable for radiography of teeth.

[0002]

2. Description of the Related Art As a conventional dental treatment chair, a dental treatment chair in which a back plate (backrest) of a chair body can be tilted is proposed in Japanese Utility Model Publication No. 57-13064. By the way, in prosthodontic treatment, orthodontic treatment, or oral surgery treatment in dentistry, X-ray imaging is performed for examination of the affected area. When doing so, it was difficult to position the patient's head correctly. Therefore, as an example of holding the head position of the patient with a chair, for example
In the safety device for the medical treatment table disclosed in Japanese Patent No. 50022,
It has been proposed that the head rest can be moved in the height direction and the width direction of the back plate.

[0003]

With the above-described conventional head rest apparatus, the head position of the patient can be determined by moving the head rest vertically and horizontally, but in dental X-ray photography,
Since it is necessary to image the narrow part of the head, the oral cavity, from various angles, it is not possible to position the patient's head in a position suitable for imaging simply by moving the patient's head up, down, left and right. Moreover, since the shooting needs to be performed from various directions such as the front side and the left and right sides, it is inconvenient for the shooting while sitting. For this reason, conventionally, in the X-ray imaging, it is necessary to perform a plurality of trial acquisitions until a desired imaging result is obtained, which causes a problem that the number of X-ray exposure of the patient increases.

Therefore, an object of the present invention is to provide a dental treatment chair which facilitates X-ray imaging in dentistry.

[0005]

According to a first aspect of the present invention, there is provided a chair main body which is rotatably provided on a base and is movable back and forth and left and right, and an armrest base which is tiltably provided on an upper portion of the chair main body. A rotation drive means for rotating the chair body, a front-rear direction drive means for moving the chair body forward and backward, a left-right direction drive means for moving the chair body left and right, and a tilting drive for tilting the head rest. And means.

According to a second aspect of the present invention, a foot support plate is rotatably provided on the chair body, and the foot support plate is provided so as to be stopped at an upper rotation position.

[0007]

According to the structure of claim 1, the chair body can be moved back and forth, left and right, and rotated to change the direction of the head, and the head rest can be tilted to position the head.

According to the second aspect of the invention, the foot of the patient can be placed on the foot support plate stopped at the upper rotation position, and the chair body can be safely rotated.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 8 show a first embodiment of the present invention, in which F is a front side, B is a rear side, R is a right side, L is a left side, and a base 2 having a substantially rectangular shape is formed in a lower portion of a chair body 1. Is provided, and a pair of moving wheels 3, 3 are provided on the left and right of the base 2.
A is provided respectively, the grounding portion of one moving rail 10 is concave and flat, and the grounding portion of the other moving rail 10A is mountain-shaped. Wheels for moving 3,3A on the left side
Can be locked by the wheel rotation lock mechanism 4,
In this wheel rotation lock mechanism 4, a lock lever 5 is rotatably provided in the center of the left side of the base 2, and a cam plate 7 having a pair of notches 6 and 6 is provided at a base end which is a rotation center of the lock lever 5. The movable rods 8 and 8 are provided on both sides of the cam plate 7 so that the movable rods 8 and 8 can be moved in the forward and backward directions by the guide member 9 and are urged toward the center by the urging means (not shown). When the lock lever 5 is rotated, the tips 8A, 8A of the front and rear moving rods 8, 8 are brought into pressure contact with the side surfaces of the moving wheels 3, 3A, respectively.
The rotation of A is locked. In addition, a substantially plate-shaped rail 10 and a substantially mountain-shaped rail 10A are provided at the installation location of the chair body 1 so as to correspond to the moving wheels 3 and 3A.

A rotation drive means 11 for rotating the chair body 1 is provided at the center of the base 2, and the rotation drive means 11 is composed of a mega torque motor or the like, and a long plate-shaped rotation base 12 is provided above the rotation portion 11A. Are provided on the outer periphery of the rotation base 12, and left and right detection means 13, 13A in the left rotation direction and the right rotation direction.
Are provided, and a contact type limit switch or the like is used as the detection means 13 and 13A. The cover of the rotation driving means 11 has an opening 14 on the rear side.
Left and right opening plates 15 and 15A are provided on both sides of the rotation base 12, and when the rotation base 12 is rotated by the rotation driving means 11, the left and right detection means 13 and 13A are located in front of the left and right contact plates 15 and 15A. The rotation is stopped by coming into contact with the operating pieces (not shown) provided respectively.
The chair body 1 is provided at a position of about 60 degrees in a plane with 15A interposed therebetween, whereby the chair body 1 can be rotated about 300 degrees in the horizontal direction. A reference position detecting means 13B is provided on the other side of the detecting means 13 and 13A.
A contact type limit switch or the like is used for 13B, and the chair body 1 is positioned in front of the base 2 by contacting a reference point 11B provided at a fixed position of the rotation driving means 11. . The left and right contact plates 15, 15 are
A is open at intervals of approximately 30 degrees on the plane.

A pair of front-rear guide rails 16, 16 are provided on the left and right of the rotary base 12 in the front-rear direction, and a first slide member 17 is movable along the front-rear guide rails 16, 16 in the front-rear direction. And the first stepping motor 18 is fixed to the front and rear guide rails 16 and 16, and the first sliding body is provided.
A rotary screw shaft 18A of the first stepping motor 18 is rotatably screwed into a transmission piece 17A fixedly provided on the lower surface of the first slide motor 17, and the first sliding body 17 is rotated by the rotation of the first stepping motor 18.
To move back and forth. Further, left and right guide rails 19, 19 intersecting with the front and rear guide rails 16, 16 are provided on the left and right sides of the first sliding body 17, and the left and right guide rails 19, 19 are provided in the left and right direction. Movable second slide
20 is provided, the second stepping motor 21 is fixed to the second sliding body 20, and the second stepping motor 21 is attached to the transmission piece 20A fixed to the lower surface of the second sliding body 20.
The rotary screw shaft 21A is rotatably screwed, and the second sliding body 20 is moved in the left-right direction by the rotation of the second stepping motor 21. The chair body 1 is fixed to an upper portion of the second sliding body 20, the chair body 1 fixes a table 22 to the second sliding body 20, and a seat plate 23 is provided at a front portion of the table 22. At the same time, a rear box 24 is provided in the rear part, and a back plate 25 is provided in front of this rear box 24.
An inclining stand 26 is provided on the upper part of the table. The front-rear guide rail 16, the first sliding body 17, and the first step motor 18 constitute a front-rear direction driving means 27, and the left-right guide rail 19, the second sliding body 20, and the second step. The motor 21 constitutes the left-right direction driving means 28.

The armrest base 26 is fixed to the upper part of a vertical shaft 31 through a joint 30 so that the vertical shaft 31 can be attached and detached and the mounting height can be adjusted. The tilting shaft mechanism 32 tilts about a tilting shaft mechanism 32 provided at an upper position in the box 24. The tilting shaft mechanism 32 has a main shaft 34 rotatably provided between left and right bearing portions 33, 33A fixed to the rear box 24. A plane elongated hole-shaped insertion hole 35 is formed in the center of the main shaft 34, a sub shaft 36 in the front-back direction is provided in the insertion hole 35, and the vertical shaft 31 is pivotally supported through the sub shaft 36. The vertical shaft 31 tilts in the left-right direction about the sub shaft 36 as viewed from a plane and tilts in the front-rear direction about the main shaft 34, whereby the vertical shaft 31
Can be tilted in all directions of 360 degrees, for example, about 10 degrees in the left-right direction and about 12 degrees in the front-back direction. Bracket at the bottom inside the rear box 24
37 is provided, a left and right guide member 38 in the left-right direction is provided on the bracket 37, a left and right sliding body 39 that is movable left and right along the left and right guide member 38 is provided, and the left and right sliding body 39 is moved left and right by stepping. The motor 40 is connected to the left and right guide members.
The stepping motor 40 is fixed to the 38 side, and a rotation screw shaft (not shown) of the stepping motor 40 is screwed into a transmission piece (not shown) provided on the left and right sliding body 39, and the left and right movements are made through the transmission piece by rotation of the rotation screw shaft. The body is designed to move left and right.
Further, the front and rear guide members in the front and rear direction are provided on the left and right sliding bodies 38.
41 is provided, and a front-rear slide body 42 that is movable back and forth along the front-rear guide member 41 is provided, and a stepping motor 43 that moves the front-rear slide body 42 back and forth is fixed to the front-rear guide member 41 side, and the stepping is performed. A rotary screw shaft 43A of the motor 43 is screwed onto a transmission piece 42A provided at a lower portion of the front-rear sliding body 42,
By the rotation of the rotary screw shaft 43A, the front-rear sliding body 42 moves back and forth via the transmission piece 42A.
Further, the lower end of the vertical shaft 31 is connected to the front-rear sliding body 42 via a rotatable spherical joint 44, and the spherical joint is formed.
The lower end of the shaft 31 is movably inserted into the insertion hole 45 of 44. And both the guide members 38, 41, both sliding bodies
Tilt drive means 46 is constituted by 39, 42 and both stepping motors 40, 43. In the figure, 47 is a cover for covering the lower part of the chair body 1, and 48 is armrests provided on the left and right of the seat plate 23.

A foot support plate 52 is rotatably provided on a front portion of the seat plate 23 via a pivot 51, and a tip end of an extendable rod 53A of a damper 53 is rotatable on a rear surface of the foot support plate 52. 7 and the rear end of the damper 53 is rotatably pivoted to the rear surface of the seat plate 52. As shown by the alternate long and short dash line in FIG.
Can be rotated upward by about 60 degrees, and is stopped and held by the damper 53 at the upper rotation position shown by the chain line. Supports 54 are provided on the left and right of the upper surface of the seat plate 23. Reference numeral 55 in the figure denotes a step fixed to the front part of the base 2.

Further, the detection means 13, 13A, 13B and the drive means 11, 27, 28, 46 are electrically connected to a control device 61 having a CPU and the like via a cable 61, and the control means are
Reference numeral 61 is based on numerical data of the oral cavity position from an operating means 62 such as a keyboard or an operating knob, and drives each driving means 27, 28, 46 by numerical control so that the oral cavity position is at a predetermined position, and the detection is performed. The rotation range of the chair body 1 is controlled by the means 13 and 13A, and the front position of the chair body 1 can be accurately positioned by the detection means 13B. That is, when the control device 61 controls the chair body 1 to be in the front position, the reference position detecting means 13B contacts the reference point 11B and outputs a detection signal, and the rotation driving means 11 is stopped by this detection signal. At the same time, a brake (not shown) is actuated to properly stop the chair body 1 at the front position, and in the same manner, the rotation of the chair body 1 is stopped by the detection signals of the detection means 13 and 13A. The cable is inserted through the opening 14 and connected to an external control device 61.

The operation of the above structure will be described below. The base 2 is moved along the rails 10 and 10A, the chair body 1 is moved to a predetermined position of an X photographing device (not shown), and the wheel rotation lock mechanism 4 is locked. Operate lever 5 and base 2
Fix the position. Next, when position information is input as numerical values from the operation means 62 according to the shooting location and the shooting angle, the driving means 11, 27, 28, 46 are driven by this input information, that is, in the rotary driving means 11. Chair body 1 is about 300
Within a range of degrees, the chair body 1 is rotated to a predetermined position and stopped, and the front-rear direction drive means 27 moves the chair body 1 in the front-rear direction to stop, and the left-right direction drive means 28 moves the chair body 1 to the left and right. Direction and stops, and further tilts the head rest 26 in the tilting drive means 46, the head along the head rest 26 is also guided to a predetermined angle, and the angle of the shooting location is also controlled. The affected area can be imaged in a desired imaging direction and angle. Further, when the chair body 1 is rotated, the foot support plate 52 is set to the upper rotation position, so that the foot resting on the foot support plate 52 can be safely rotated without hitting the lock lever 5 or a device such as the step 55. it can.

As described above, in this embodiment, the chair body 1 rotatably provided on the base 2 and movable back and forth and left and right.
An armrest 26 provided on the upper part of the chair body 1 so as to be tiltable, a rotation driving means 11 for rotating the chair body 1, a front-back direction driving means 27 for moving the chair body 1 back and forth, and a chair body. Since it is provided with a left-right direction driving means 28 for moving 1 to the left and right and a tilting driving means 46 for tilting the head rest 26, the chair body 1 is rotated by the respective driving means 11, 27, 28, and back and forth. By moving and moving left and right, the patient can move to a predetermined position and direction with respect to the X-ray imaging apparatus, and since the tilting drive means 46 tilts the headrest 26 at a desired angle, the patient's head is moved. The imaging angle of the affected area can be accurately adjusted by guiding the area to a predetermined angle. Therefore, desired X-ray imaging can be performed with one imaging, and the number of X-ray exposure of the patient can be suppressed to the minimum.

As described above, in this embodiment, the chair body 1
The foot support plate 52 is rotatably provided on the foot support plate 52 so that the foot support plate 52 can be stopped at the upper rotation position.
By stopping 52 at the upper rotation position and placing the foot on the foot support plate 52, the chair body 1 can be safely rotated without the foot touching the equipment.

Further, as an effect of the embodiment, each driving means 1
1, 27, 28, 46 are numerically controlled by the controller 61,
Since the position of the chair body 1 and the angle of the headrest 26 are controlled, the head of the patient can be accurately positioned at a position suitable for X-ray imaging. Further, since the front-rear direction driving means 27 and the left-right direction driving means 28 are provided above the rotation driving means 11, the chair body 1 can be rotated and moved in the left-right direction and the front-rear direction in a relatively small space. Further, the chair body 1 is fixed to the rail 10 by the moving wheels 3 and 3A of the base 2.
Since it is configured to be movable via 10A and can be fixed in position by the wheel rotation lock mechanism 4, for example, a rail
The treatment table is arranged on one side of the 10 and 10A and the X-ray photographing apparatus is arranged on the other side, and the chair body 1 can be moved to selectively perform treatment and X-ray photographing. In addition, one rail 10
Since A is formed into a mountain shape and a moving wheel 3A that engages with the mountain shape rail 10A is provided, the mountain shape rail 10A and the wheel 3 are provided.
The left and right positions of the chair body 1 can be accurately set by engaging with A, and the position control of the chair body 1 can be accurately performed with the rail 10A as a reference.

FIG. 9 shows a second embodiment of the present invention, in which the same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. A foot support plate drive device 71 such as a motor is provided in the lower portion, and the foot support plate 52 is automatically rotated by this drive device at an angle, and the drive device 71 is electrically connected to the control device 61, The control device 61 controls at least the foot support plate 52 to rotate to the upper rotation position and stop before rotating the chair body 1, or to the upper rotation position and the lower position by operating the operation means 62. It is designed to move selectively.

The present invention is not limited to the above-mentioned embodiment, but various modifications can be made within the scope of the gist of the present invention, and each driving means 11, 27, 28, 46, 71 can be variously modified. A type can be used, and the arrangement of the driving means 11, 27, 28 can be appropriately selected by providing the rotation driving means 11 above the front-rear and left-right driving means 27, 28. Also,
A drive device may be connected to the moving wheels 3 and 3A so that the base 2 is self-propelled.

[0021]

According to the invention of claim 1, a chair body rotatably provided on a base and movable back and forth and left and right, an armrest provided on the upper part of the chair body so as to be tiltable, and the chair. It comprises a rotation drive means for rotating the main body, a front-back direction drive means for moving the chair body back and forth, a left-right direction drive means for moving the chair body left and right, and a tilt drive means for tilting the head rest. Therefore, it is possible to minimize the number of X-ray exposure of the patient, and it is possible to provide a dental treatment chair that facilitates X-ray imaging in dentistry.

According to a second aspect of the present invention, a foot support plate is rotatably provided on the chair body, and the foot support plate is provided so as to be stopped at an upper rotation position. Therefore, it is possible to provide a dental treatment chair that facilitates X-ray imaging in dentistry.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part showing a first embodiment of the present invention.

FIG. 3 is a sectional view of an essential part showing a first embodiment of the present invention.

FIG. 4 is a plan view of an essential part showing a first embodiment of the present invention.

FIG. 5 is a cross-sectional view of tilting drive means showing the first embodiment of the present invention.

FIG. 6 is a cross-sectional view of tilting drive means showing the first embodiment of the present invention.

FIG. 7 is a cross-sectional view of the foot support plate showing the first embodiment of the present invention.

FIG. 8 is a block diagram showing a first embodiment of the present invention.

FIG. 9 is a sectional view of a foot support plate showing a second embodiment of the present invention.

[Explanation of symbols]

 1 Chair main body 11 Rotational drive means 26 Resting head 27 Front-rear direction drive means 28 Left-right direction drive means 46 Tilt drive means

Claims (2)

[Claims] 1. A chair main body rotatably provided on a base and movable back and forth and left and right, an armrest base tiltably provided on an upper portion of the chair main body, and a rotation driving means for rotating the chair main body. And a front-rear direction driving means for moving the chair body back and forth, a left-right direction driving means for moving the chair body left and right, and a tilting drive means for tilting the armrest base. For treatment chair. 2. The dental treatment chair according to claim 1, wherein a foot support plate is rotatably provided on the chair body, and the foot support plate is provided so as to be stopped at an upper rotation position.