JPH07308350A - Clinic chair - Google Patents

Abstract

PURPOSE:To provide a clinic chair which enables the turning or stopping thereof by a slight force by reducing the mass of a rotary part including a sheet frame and a back frame to lower the inertial force. CONSTITUTION:A support body 26 is fixed on a slider 30 of a base 7 and a sheet frame 32 is supported rotatably by a ball bearing 31. The support body 26 is driven upward or downward with an hydraulic cylinder 8 so that the lower limit position of the sheet frame 32 is lowered while the mass of a rotary part including the sheet frame 32 is reduced thereby enabling turning or stopping by a slight force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical examination chair which can be suitably used as a medical examination table such as an otolaryngological examination table and a dental examination table.

[0002]

2. Description of the Related Art A typical prior art is, for example, Shokai Kai5.
No. 8-40136. In this prior art, a mounting base extending downward is fixed to the lower part of a human body support part including a back plate and a seat plate, and the mounting base is supported via a bearing to a base fixed to a fixed position such as a floor plate. A configuration is disclosed.

[0003]

In such a prior art, since the support portion and the mounting base are rotated and the mass of the rotated portion is large, a large force is required for the rotation, and therefore a motor or the like is required. However, there is a problem that the structure becomes complicated and large in size. Further, in this prior art, since the mass of the rotating portion is large, a large inertial force is generated when the rotating portion is rotated, and it is difficult to stop the rotating portion accurately at a desired position. Further, in this prior art, since the rolling element is interposed between the upper end surface of the base and the lower end surface of the mounting base to form the bearing, the lower limit position of the support unit when the supporting unit is moved up and down on the mounting base. There is a problem that it must be high.

Other prior arts are, for example, Japanese Utility Model 3-50.
No. 908 publication. In other prior art,
An elevating means realized by a link mechanism is provided on the support portion, and a lower portion of the elevating means is provided on the base via a bearing so as to be rotatable about a vertical axis.

In such another prior art, bearings having an axis in the radial direction are provided at a lower portion of the elevating means at intervals in the circumferential direction, and the bearings are supported on a base to which the bearings are attached. It is configured to be rotationally driven by a motor. Also in such a configuration, there is a problem that the upper rotating portion pivotally supported by the bearing is rotationally driven by the motor, so that the configuration becomes complicated and large. Further, since the mass of the rotating portion supported by the bearing is large, the inertial force during rotation by the motor is large, an excessive load is applied at the start of rotation, and it is not possible to accurately stop at a desired position. is there. Further, when the inertial force is large as described above, a large force is required for the operator to manually angularly displace the rotating portion to a desired position or accurately stop the rotating portion to a desired position, resulting in poor operability. There is.

Therefore, an object of the present invention is to easily rotate a rotating portion including a supporting portion for supporting a human body with a simple structure,
And, it is to provide a medical examination chair that can be accurately stopped at a desired position.

[0007]

According to the present invention, there is provided a base, a support provided on the base, and an elevating means for elevating and lowering the support in a state in which the support is prevented from rotating. A seat frame rotatable with respect to the support and lockable at an arbitrary rotational position; rotating means for rotatably supporting the seat frame with respect to the support between the seat frame and the support; A medical examination chair comprising: a locking means for locking a seat frame rotatably supported by means at an arbitrary rotation position; and a back frame tiltably connected to one end of the seat frame. .

According to the present invention, the elevating means includes a hydraulic cylinder provided between the support and the base, a guide cylinder having a rectangular cross section, a plurality of guide rollers provided on the guide cylinder, and a guide roller. And a slider fixed to a lower portion of the support body so as to be vertically movable.

Further, according to the present invention, the rotating means is constituted by a ball bearing having an inner ring fixed to a support and an outer ring fixed to a seat frame, and the locking means is installed coaxially with a rotation axis of the seat frame. It is a non-excitation actuated electromagnetic brake that has been used.

According to the present invention, the seat frame includes
It is characterized in that a locking means for locking the back frame at a predetermined tilting position and a damper for generating a braking force in the tilting direction of the back frame in a state where the locked state is released are provided.

[0011]

According to the present invention, the support provided on the base is driven up and down with respect to the base by the lifting means, and the seat frame is rotatably supported by the support by the rotating means. Locking means is provided on the support, and the seat frame is locked by the locking means with respect to the support at an arbitrary rotational position. This can prevent the rotating portion including the seat frame from rotating undesirably. A back frame is tiltably connected to the seat frame and can support the back of the patient. In this way, the mass of the rotating portion is reduced to reduce the inertial force, and the rotating portion is stopped or stopped with a slight force, as compared with the structure in which the lifting means is provided in the rotating portion as in the prior art. You can

Further, according to the invention, the elevating means is arranged such that the hydraulic cylinder is provided between the support and the base, and the slider is guided up and down by the guide roller provided on the guide cylinder. Need not be rotated, which also reduces the mass of the rotating part,
It can be rotated or stopped with a slight force, and operability is improved.

Further, according to the present invention, the rotating means is constituted by a ball bearing in which the inner ring is fixed to the support and the outer ring is fixed to the seat frame. As a result, the bulkiness of the rotating means in the axial direction can be reduced, and the lower limit position of the rotating portion including the support, the seat frame and the back frame can be lowered so that the passenger can easily get on and off. Further, since the locking means is constituted by the non-excitation actuated electromagnetic brake, the braking of the rotating portion including the seat frame, the back frame and the support is released only when the electromagnetic brake is excited, so that the power consumption is reduced. Can be reduced to improve the economic efficiency.

Further, according to the invention, the seat frame is provided with a locking means for locking the back frame at a predetermined tilting position and a damper for generating a braking force in the tilting direction of the back frame. Since the back frame can be locked at a desired tilt angle by the locking means, it is possible to prevent the back frame from unnecessarily tilting to an undesired tilt angle and improve safety. Further, the damper can prevent the back frame from being tilted vigorously when pushed by the back, which also improves the safety.

[0015]

1 is a perspective view showing an entire otolaryngological examination table 1 according to an embodiment of the present invention. The otolaryngological examination table 1 which is a medical examination chair basically includes a chair 5 which supports a patient 2 who is a human body in a seated posture indicated by a virtual line 3 or a lying posture indicated by a virtual line 4, and a medical examination room. And a hydraulic cylinder 8 for driving the chair 5 up and down in the directions of the arrows A1 and A2.

The chair 5 has a back plate 9 for supporting the back of the patient 2 and a seat plate 10 on which the patient 2 sits. The back plate 9 is connected to the seat plate 10 so as to be tiltable about the axis of the first horizontal axis 11 in the directions of arrows B1 and B2, and the headrest 12 is attached to the free end of the back plate 9 by the arrow C1 ,. It is provided so as to be capable of expanding and contracting obliquely forward or backward as indicated by C2. Seat plate 1
At 0, the footrest 14 that supports the leg of the patient 2 when the patient 2 is in the lying position shown by the imaginary line 4 is angularly displaceable around the second horizontal axis 13 in the directions of the arrows D1 and D2. Be connected.

On both sides of the seat plate 10, a pair of armrests 15a and 15b, which are realized by a pipe made of resin such as urethane or a metal pipe, are provided so as to be curved upward from the seat plate 10. Each armrest 15a, 15
The hanging parts 16a and 16b connected to b and extending below the footrest 14 are connected to each other, and a step 17 is provided so as to cover the connecting part.

FIG. 2 is a sectional view showing the internal structure of the otolaryngological examination table 1, and FIG. 3 is a plan view seen from above in FIG. The base 7 is a flat base 21 placed on the floor 6.
A right cylindrical inner cover body 22 having an axis perpendicular to the base 21 and an upper support body 26. The inner cover body 22 is hung from the outer peripheral surface of the inner cover body 22 in the radial direction, and And an outer cover body 23 that covers the cover body 22 from above. These inner cover body 22 and outer cover body 23
The housing 24 is constituted by.

An opening 25 is formed in the upper portion of the outer cover body 23, and a support body 26 is provided above the opening 25. The support body 26 is prevented from rotating with respect to the base 7 by the elevating means 27. In this state, it is circumferentially driven in the directions of arrows A1 and A2. The elevating means 27 includes the hydraulic cylinder 8 and a guide tube 28 having a rectangular cross section as shown in an enlarged view in FIG.
And a plurality of guide rollers 2 provided on the upper part of the guide cylinder 28.
9 and the upper end of the guide tube 28 are fixed to the support 26.
Slider 3 with a rectangular cross section that is guided up and down along
Including 0 and.

The support 26 has a ball bearing 31 as a rotating means.
A seat frame 32 rotatably supported around a vertical rotation axis is provided, and a back frame 33 is connected to one end of the seat frame 32 so as to be tiltable in the arrow B1 and B2 directions. The seat frame 32 is a base frame 32.
a, a disk-shaped member 32b for fixing an annular seat plate 57 which is a member of the electromagnetic brake 41 above the base frame 32a,
The outer ring 36 of the ball bearing 31 at the bottom of the base frame 32a is attached to the base frame 32
It is composed of an annular member 32c for sandwiching it with a. A foot frame 34 is connected to the other end of the seat frame 32 so as to be tiltable in the arrow D1 and D2 directions. The seat plate 10 is attached to the seat frame 32, the back plate 9 is attached to the back frame 33, and the foot frame 3 is attached.
The footrest 14 is attached to 4.

The ball bearing 31 includes an inner ring 35 and an outer ring 36.
And a plurality of spherical rolling elements 37 interposed between the inner ring 35 and the outer ring 36. The inner ring 35 is the support 26.
The outer ring 36 is fixed to the seat frame 32. The support 26 has a flange 38, the flange 3
The upper end of the slider 30 and the piston rod 39 of the hydraulic cylinder 8 are fixed to the shaft 8. Hydraulic oil is supplied to the hydraulic cylinder 8 from the pump motor 40, and the piston rod 39
Can be extended / degenerated. The support 26 is provided with a non-excitation actuated electromagnetic brake 41 which is a locking means for braking the rotation of the seat frame 32. The ball bearing 31 has an inner ring 35, rolling elements 37, and an outer ring 36 arranged in the radial direction. The outer ring 36 includes a base frame 32a of a seat frame 32 and an annular member 3 of the seat frame 32.
The seat frame 32 is attached by being sandwiched by 2c.
In this way, the ball bearing 31 and the seat frame 32 are provided in the radial direction of the support body 26, so that the ball bearing 31 and the seat frame 32 do not become bulky in the height direction (vertical direction in FIG. 2), and the floor 6 to the seat plate 10 at the lower limit position. The height H can be lowered. Thus, even if the patient 2 is an infant or an elderly person, the patient can easily sit on the seat board 10.

FIG. 5 is an enlarged sectional view showing the internal structure of the non-excitation actuated electromagnetic brake 41. The electromagnetic brake 4
1 has an annular electromagnetic coil 45 and an annular permanent magnet piece 46 coaxially provided below the electromagnetic coil 45. Between the electromagnetic coil 45 and the permanent magnet piece 46, for example, a cylindrical member 47 made of a magnetically permeable material such as synthetic resin, and an annular plate-like member which is vertically connected to one axial end of the cylindrical member 47. A partition member 49 on which the portion 48 is formed is interposed. The electromagnetic coil 45, the permanent magnet piece 46, and the partition member 49 have a casing 5 having a substantially U-shaped cross section.
It is housed coaxially in 0. The casing 50 is made of a magnetically permeable material such as metal, and has an insertion hole 52 formed in the center thereof, into which the screw portion 51 formed in the upper end portion of the slider 30 is inserted, and the screw portion inserted into the insertion hole 52. 5
A nut 53 is screwed onto the first member 1, and the partition member 49, the permanent magnet piece 46, and the casing 50 are fixed to the slider 30.

The electromagnetic coil 45 is fitted into an annular groove 54 formed between the partition wall 49 and the casing 50, and the annular lid 5 is made of a magnetically permeable material such as metal.
Covered by 5. Directly above the magnet body 56 having such a configuration, the disc-shaped member 32 of the seat frame 32 is provided.
An annular seat plate 57 fixed to the lower surface of b, an annular attachment piece 58, and an armature 59 are coaxially provided to constitute the electromagnetic brake 41.

The armature 59 is made of a ferromagnetic material such as iron, and has a gap ΔL directly above the electromagnetic coil 45.
Are placed facing each other. When the electromagnetic coil 45 is not excited, the armature 59 is magnetically attracted by the magnetic flux 60 of the permanent magnet piece 46, and the seat frame 32 can be braked. When the electromagnetic coil 45 is excited,
A magnetic flux 61 is generated in a direction of canceling the magnetic flux 60 by the permanent magnet piece 46, the magnetic flux 60 of the permanent magnet piece 46 is canceled by the magnetic flux 61 of the electromagnetic coil 45, the attraction of the armature 59 is released, and the seat frame 32 is rotatable. To be in a state.

FIG. 6 is an exploded perspective view of the support 26.
The support 26 has an annular push ring 63 and a mounting member 64 to which the push ring 63 is coaxially fixed. The push ring and the attachment members 63 and 64 are made of steel. The push ring 63 is composed of a straight cylindrical tubular portion 65 and a pressing portion 66 in which one axial end portion of the tubular portion 65 is vertically continuous and which projects radially outward from the outer peripheral surface of the tubular portion 65. , Tubular part 65
A plurality of (4 in this embodiment) notches 67a to 67d are formed in the pressing portion 66 at equal intervals in the circumferential direction. The cylindrical portion 65 is formed by the notches 67a to 67d.
The connecting portions 68a to 68d formed in the
To 69d are formed, and the insertion holes 69a to 69d are formed.
The shaft portions of the screws 70a to 70d are respectively inserted in the screws. When the screws 70a to 70d are mounted in the insertion holes 69a to 69d, the ends of the shafts of the screws 70a to 70d project from the lower surface 71.

The mounting member 64 includes a bottom portion 72 and an inner cylinder portion 7.
3 and an outer cylinder portion 74. The threaded portion 51 of the slider 30 is inserted into the inner cylinder portion 73, and is sandwiched by the nut 53 and the support surface 75 (see FIG. 5) of the slider 30.
The outer tubular portion 74 is coaxial with the first to third outer peripheral surfaces 76, 77, 78 and the first to third outer circumferential surfaces that are annular from the radially inner side to the radially outer side.
Step surfaces 81, 82 and 83 are formed. First step surface 8
1, and the insertion hole 69a is provided in the rising portion 84 that projects from the second step surface 82 to one side in the axial direction (upward in FIG. 6).
A plurality of (4 in the embodiment) screw holes 8 at the same intervals as ~ 69d.
5a-85d are formed. These screw holes 85a-8
The protruding portions of the screws 70a to 70d protruding from the lower surface 71 are screwed into the 5d.

In this way, in the state where the push ring 63 is fixed to the mounting member 64 by the screws 70a to 70d, the inner ring 35 of the ball bearing 31 is sandwiched between the pressing portion 66 and the second step surface 82. The outer ring 36 and the inner ring 35 are coaxially arranged outward in the radial direction.
The rolling element 37 is interposed between the outer ring 36 and the outer ring 36. In this way, the ball bearing 31 is moved in the vertical direction A of the seat frame 32.
Since it is arranged perpendicularly to A1 and A2, it is not bulky in the vertical directions A1 and A2, and the seat frame 3
The lower limit position of 2 can be lowered.

FIG. 7 is a plan view showing the attachment piece 58. The attachment piece 58 has a flexible tongue portion 87a.
~ 87c. A plurality (three in this embodiment) of insertion holes 88a to 88 are formed in the annular portion 86 at equal intervals in the circumferential direction.
c is formed, and insertion holes 89a to 89c are formed in the tongues 87a to 87c, respectively. Each insertion hole 88a
88c are formed between the insertion holes 89a to 89c in the circumferential direction.

The insertion holes 88a to 88c are shown in FIG. 8 (1).
As shown in FIG. 5, the screws 90 are respectively inserted and screwed to the seat plate 57. A screw 91 is inserted into each of the insertion holes 89a to 89c and screwed into the amateur 59. Therefore, the amateur 59 is the electromagnetic brake 41.
When magnetically attracted by the
The armature 59 is separated from the seat plate 57 by being deformed as shown in (2). As a result, the electromagnetic brake 41 attracts the armature 59 with a large magnetic attraction force, and a large braking force can be obtained.

Such a non-excitation actuated electromagnetic brake 41
By using, it is possible to reduce unnecessary power consumption.

Referring again to FIG. 3, the seat frame 32 includes a pair of parallel lateral members 9 extending in the left-right direction in FIG.
2a, 92b, a pair of vertical members 93a, 93b connecting the horizontal members 92a, 92b, and the horizontal members 92a, 92b.
One of the vertical members 93b has a pair of bosses 94a and 94b that project to both sides (vertical direction in FIG. 3).
A lower end portion of the back frame 33 is connected to one end portions (left end portions in FIG. 3) of the lateral members 92a and 92b in the longitudinal direction so as to be tiltable around a horizontal axis 96 by a shaft 95. Further, the upper end of the foot frame 34 is connected to the other end (right end in FIG. 3) of each of the lateral members 92a and 92b by a shaft 97 so as to be tiltable around a horizontal axis 98,
The footrest 14 is attached to the foot frame 34. Each axis 96, 98 is parallel to each other. The slider 30 has a central axis 99 at the center of a rectangular frame-shaped portion formed by the horizontal members 92a and 92b and the vertical members 93a and 93b.

FIG. 9 is a side view showing the structure of the link means 91 provided on the seat frame 32. Referring also to FIG. 3 described above, a substantially U-shaped swing member 101 is provided below the seat frame 32. The swinging member 101 includes a pair of parallel swinging pieces 102a, 1 arranged close to the lateral members 92a, 92b, respectively.
02b and a connecting piece 103 that connects the swinging pieces 102a and 102b to each other at substantially right angles to one end of the swinging pieces 102a and 102b in the longitudinal direction. Each swing piece 102a,
102b and the connecting piece 103 are made of rod-shaped metal.

The longitudinal ends of the link members 105a and 105b are pin-coupled to the longitudinal ends of the swinging pieces 102a and 102b through the pins 104a and 104b, respectively.
The other longitudinal ends of the link members 105a and 105b are
The shaft 106 is pin-connected to the other longitudinal ends of the lateral members 92a and 92b. The other ends of the pair of swing arms 107a and 107b in the longitudinal direction are fixed near the center of the shaft 106 in the axial direction, and the other end of the swing arms 107a and 107b in the longitudinal direction are pin 108 of the rod 109. One end in the longitudinal direction is pin-connected. The other end of the rod 109 in the longitudinal direction is attached to the pair of swing arms 1 by a pin 110.
Pins 11a and 111b are coupled to one end in the longitudinal direction, and the other end in the longitudinal direction of each swing arm 111a and 111b is fixed to the foot frame 34. The swing arms 111a and 111b are pivotally supported by the shaft 97.

At the central portion in the longitudinal direction of the connecting piece 103,
The adjustment rod 113 is screwed on. This adjusting rod 1
One longitudinal end of 13 is pin-coupled to the back frame 33 by a pin 114. An external thread is engraved on the other end of the adjusting rod 113, and a tightening nut 115 is screwed on. By adjusting the adjusting rod 113 to a desired protruding length and tightening the nut 115 with such a configuration, the relative angular displacement amount between the back frame 33 and the foot frame 34 can be set. The pins 104a and 104b, the shaft 106 and the pins 110 and 11
The axes of 4 are parallel to the axes 96 and 98 of the axes 95 and 97, respectively. The horizontal members 92a and 92b, the base end portion 116 of the back frame 33, the adjusting rod 113, the swinging member 101, and the link members 105a and 105b form a parallelogram link. In addition to such a parallelogram link, rod 109 and swing arm 11
The link means 91a, 91, including 1a, 111b.
b.

When the distance between the shaft 95 and the pin 114 is L1, the distance between the shaft 106 and the pins 104a and 104b is L2, and the distance between the pin 110 and the shaft 97 is L3, for example, L1 = 35 mm, L2 = 30 mm, L3
= L2, the angle θ1 in the tiltable range of the foot frame 34 is about 110 degrees. In this case, the retreat angle θ2 from the vertical plane of the foot frame 34 is selected to be 20 °. This retreat angle θ2 causes the foot of the patient 2 to retract and facilitates the operator's approach from the front of the patient 2. The angle θ3 of the tiltable range of the back frame 33 is about 90 degrees. In this case, the back frame 33 is in an upright state and almost on the vertical plane. By properly selecting these intervals L1 to L3, the tilt range of the back frame 33 and the foot frame 34 can be individually adjusted.

Each lateral member 92a, 92b and each rocking piece 102
The rocking ends of the pair of dampers 117a and 117b are connected to a and 102b. Each damper 117a, 117b
Is a gas damper and is a cylinder 118a, 118b
A diaphragm (not shown) is provided therein, and an elastic force is generated in a direction in which the rods 119a and 119b are contracted by utilizing fluid resistance such as air. By these dampers 117a and 117b, a braking force is generated in a direction in which the back plate 9, and thus the back frame 33, is tilted, whereby the back frame 33,
Therefore, even if the back plate 9 is pushed by the back of the patient 2, it can be prevented from falling down vigorously. Moreover, the above-mentioned link means 91
Since the back frame 33 and the foot frame 34 are connected to each other through the, the footrest 14 is not likely to rise vigorously, and the safety is improved.

FIG. 10 is an enlarged sectional view taken along the section line XX in FIG. A locking means 121 for locking the back frame 33 at a predetermined position within the tilting range indicated by the angle θ3 is provided near the connecting portion of the one lateral member 92b with the back frame 33. This locking means 121 has a bottomed cylindrical casing 122, a lock pin 123 that can be inserted into and removed from the casing 122, a compression coil spring 124 housed in the casing 122, and one end in the longitudinal direction of the casing 122. The operation lever 12 pivotally supported by the peripheral wall, and the other end in the longitudinal direction of the operation lever 12 extending outwardly from an elongated hole 125 formed in the peripheral wall of the casing 122.
6 and.

The casing 122 is screwed to the lateral member 92b by screws (not shown), etc.
An insertion hole 127 through which the lock pin 123 is inserted is formed in b. At the base end portion 116 of the back frame 33,
Fitting recess 1 into which the vicinity of the tip of the lock pin 123 is fitted
28 is formed. The fitting recess 128 is formed by the shaft 95.
A plurality of them may be formed at intervals in the circumferential direction around the axis 96 of. In the present embodiment, two fitting recesses 128 are formed at an upper limit position where the back frame 33 stands up and a lower limit position where the back frame 33 tilts substantially horizontally, that is, at positions corresponding to both ends of the angle θ3.

A radial hole 129 is formed in the lock pin 123 so that the operating lever 126 can freely pass therethrough. Operating lever 12
By operating 6 in the direction of arrow E, the lock pin 1
23 is displaced in the direction of retracting into the casing 122 against the spring force of the compression coil spring 124, and the tip end thereof is disengaged from the fitting recess 128. As a result, the locked state of the back frame 33 is released, and the back frame 33 can be tilted at an arbitrary angle.

In the above embodiments, the otolaryngology examination table has been described. However, as another embodiment of the present invention, the present invention is preferably applied to, for example, a dental examination table and an obstetrics and gynecology examination table. You can

In the above embodiment, the inner ring 35 of the ball bearing 31 is fixed by the support 26, and the seat frame 32 is fixed.
Although the outer ring 36 is fixed to the seat, the outer ring 36 may be fixed to the support 26 and the inner ring 35 may be fixed to the seat frame 32 as another embodiment of the present invention.

[0042]

According to the present invention, since the rotating means is provided between the seat frame and the support to rotatably support the seat frame, the lower limit position of the seat frame can be lowered. The elderly, the young, and the physically handicapped can easily sit down. Further, since the back plate can be locked at any rotation position by the locking means, there is no risk of undesired rotation.
Safety is improved. Moreover, as compared with the structure of rotating the elevating means around the rotation axis as in the above-mentioned prior art, the structure of the rotated portion can be small, and therefore the mass of the rotating portion including the back frame and the seat frame can be small. Therefore, it is possible to rotate and stop with a slight force, and the rotation operation is easy.

Further, according to the present invention, since the guide roller is provided in the guide cylinder having a rectangular cross section to guide the slider up and down, only the structure above the support fixed to the slider can be rotated. It suffices to reduce the mass of the rotated portion, and it is possible to rotate or stop with a slight force, and the operability is improved.

Furthermore, according to the present invention, the rotating means is constituted by a ball bearing, the inner ring of which is fixed to the support and the outer ring of which is fixed to the seat frame, and the links and dampers are provided on both sides of the chair outside the ball bearing. Since the ball bearings are disposed, the bulkiness of the ball bearings can be reduced, which also allows the lower limit positions of the seat frame and the back frame to be lowered, so that the patient can easily get on and off. . Further, since the non-excitation actuated electromagnetic brake is used as the locking means, the braking for the rotation of the rotating portion including the seat frame can be released only when the electromagnetic brake is excited, thereby reducing the power consumption. You can

Further, according to the present invention, since the back frame can be locked at the predetermined tilting position by the locking means, there is no possibility that the back frame tilts easily and the safety is improved. In addition, since the seat frame is provided with a damper that generates a braking force in the direction in which the back frame is tilted, when the patient leans against the back frame, there is no risk of the back frame tilting vigorously. Also improves safety.

[Brief description of drawings]

FIG. 1 is a perspective view showing an otolaryngology medical examination table 1 according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing the internal structure of the otolaryngology medical examination table 1.

FIG. 3 is a plan view seen from above in FIG.

FIG. 4 is a sectional view taken along the section line IV-IV in FIG.

FIG. 5 is an enlarged cross-sectional view showing the internal structure of a non-excitation actuated electromagnetic brake 41.

6 is an exploded perspective view of a support 26. FIG.

FIG. 7 is a plan view of a mounting piece 58.

FIG. 8 is a diagram for explaining the operation of the amateur 59.

9 is a side view showing the configuration of link means 91. FIG.

10 is an enlarged cross-sectional view taken along the section line XX of FIG.

[Explanation of symbols]

 1 Otolaryngology Clinic 2 Patient 7 Base 8 Hydraulic Cylinder 9 Back Plate 10 Seat Plate 12 Headrest 15a, 15b Armrest 22 Inner Cover Body 23 Outer Cover Body 26 Support Body 27 Elevating Means 28 Guide Tube 29 Guide Roller 30 Slider 31 Ball Bearing 32 Seat frame 33 Back frame 34 Foot frame 35 Inner ring 36 Outer ring 37 Rolling element 41 Non-excitation actuated electromagnetic brake 59 Amateur 91 Link means 121 Locking means

Claims (4)

[Claims] 1. A base, a support provided on the base, an elevating means for elevating and lowering the support in a state where rotation of the base is blocked, and a support rotatable with respect to the support. A seat frame that is present and can be locked at any rotation position; rotation means that rotatably supports the seat frame with respect to the support between the seat frame and the support; and rotatably supported by the rotation means A medical examination chair comprising: a locking means for locking the seat frame at an arbitrary rotational position; and a back frame tiltably connected to one end of the seat frame. 2. The elevating means is a hydraulic cylinder provided between a support and a base, a guide cylinder having a rectangular cross section, a plurality of guide rollers provided on the guide cylinder, and is vertically movable via the guide rollers. The medical treatment chair according to claim 1, further comprising a slider that is guided and fixed to a lower portion of the support. 3. The rotating means is constituted by a ball bearing having an inner ring fixed to a support and an outer ring fixed to a seat frame, and the locking means is provided coaxially with a rotation axis of the seat frame. The medical examination chair according to claim 1 or 2, which is an excitation actuated electromagnetic brake. 4. The seat frame has locking means for locking the back frame at a predetermined tilting position, and a braking force is generated in a direction in which the back frame tilts when the locked state is released. The medical examination chair according to any one of claims 1 to 3, further comprising a damper.