JPS6010570Y2 - Actuation device in dental chair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an actuation device for a dental chair developed in connection with an underseat and a backrest.

As is well known, the underseat of conventional dental chairs has a single shape on which the entire body rests from the buttocks to the legs (note: the part where the legs rest is slightly tilted downward, e.g. 12~
It is tilted downward by 13 degrees.

)Although this underseat was provided so that it could move up and down with respect to the base board, the underseat itself was inoperable.

However, in such a conventional underseat,
It may be fine if the patient's upper body is upright or nearly upright and in contact with the backrest, but if the backrest is tilted, the patient's upper body may be tilted so that the area from the knee joint to the buttocks is on the same plane. This resulted in a feeling of pain, especially in the abdominal muscles, especially when the treatment was performed for a long period of time, such as 10 to 2 degrees, with the backrest highly tilted (for example, 60 to 9 C). .

This invention was developed by focusing on the points mentioned above, and its purpose is not only when the backrest is tilted by about 306 degrees, but also when it is tilted by a large amount, for example, 60 to 90'. To provide an actuation device for a dental chair, which prevents a patient from being in an unreasonable posture and therefore eliminates the patient's feeling of fatigue even during continuous long-term treatment.
Another object of the present invention is to provide an operating device for a dental chair that can steplessly tilt the backrest and firmly maintain the tilted position.

Furthermore, another object of the present invention is that various mechanisms, such as the movable arcuate plate for the backrest, the upper leg underseat base plate, and related mechanisms, can be operated by a single hydraulic cylinder, thereby achieving a compact structure. At the same time, it is useful for energy saving, and the backrest can be made upright or tilted down to the desired degree by simply moving the plunger of the hydraulic cylinder back and forth in a plane, in other words, without using cams or gears. To provide a dental chair that can convert planar reciprocating motion into rotational motion in the elevation/depression angle direction, which can reduce initial cost and running cost, is mechanically reasonable, and has a long service life. The present invention provides an actuating device for use in the present invention.

Next, an embodiment of the present invention capable of achieving the above object will be described in detail with reference to the accompanying drawings.

Reference numeral 1 indicates a base frame fixed to a conventionally known vertical movement device installed on a base board, 2 indicates left and right side plates fixed to the left and right rear parts of the base frame 1, and 3 indicates a buttocks fixed to the left and right side plates 2. Reference numeral 4 indicates a buttock underseat substrate having an underseat portion 3a, numeral 4 indicates an upper leg underseat substrate having an upper leg underseat portion 4a, numeral 5 indicates a lower leg underseat substrate having a lower leg underseat portion 5a, and the upper leg underseat substrate 4 is The buttock underseat board 3 is provided to be rotatable in the vertical direction via a hinge 6, and the lower leg underseat board 5 is provided to the upper leg underseat board 4 to be rotatable in the up and down direction via a hinge 7. .

8 indicates a hydraulic cylinder having a plunger 8a;
The base of the hydraulic cylinder 8 is rotatably provided on left and right support plates 9 erected at the front of the base frame 1 via a shaft 10 .

Reference numeral 11 indicates a first interlocking plate, 12 a second interlocking plate, and 13 a front-rear moving plate. The middle of the first interlocking plate 11 rotates around a front longitudinal shaft 14 mounted horizontally on the front of the left and right support plates 9. One end is rotatably connected to one end of the back and forth moving plate 13 via a shaft 15.

The other end of the first interlocking plate 11 is an actuating plate 17 rotatably provided on the back surface of the upper leg underseat base plate 4 via a shaft 16.
is rotatably connected via a shaft 18 to.

Furthermore, a shaft 19 is attached to the rear end of the second interlocking plate 12 midway through the actuating plate 17.
The distal end is rotatably connected via a shaft 19 to a protrusion 20 protruding from the back surface of the lower leg underseat base plate 5.

22 is a backrest board 2 having a backrest 23a
3 indicates a movable arc-shaped plate fixed to the distal end, and two bearing plates 22a are fixed to the base end of the movable arc-shaped plate 22, and the bearing plates 22a and the above-mentioned back and forth moving plate 13 are connected to each other. A rear long shaft 24 is fitted into the other end and the tip of the plunger 8a.

In other words, the bearing plate 22a, the longitudinal movement plate 13, and the plunger 8a are rotatably provided with respect to the rear long shaft 24.

Further, a coil spring 25 is stretched between the protruding rod 13a projecting from the longitudinal movement plate 13 and the aforementioned front long axis 14.

26 and 27 are bearings 26a and 27a on the left and right side plates 2, respectively.
A group of upper rollers and a group of lower rollers are shown with a predetermined spacing between them.
It consists of several rollers.

) A movable arcuate plate 22 is inserted between the upper roller group 26 and the lower roller group 27.

Although not shown, a conventionally well-known headrest is attached to the top of the backrest board 23.

Next, to explain its effect, in the state shown in FIG. 2, the patient is sitting on the underseat section 3a, and then his upper legs are placed on the upper leg underseat section 4a, and his lower legs are placed on the lower leg underseat section 5a.
, and its back abuts against the backrest 23a, and the plunger 8a of the hydraulic cylinder 8 is appropriately retracted as necessary.

At this time, as the plunger 8a retreats, the movable arcuate plate 22 moves against the upper roller group 26 via the rear long shaft 24 and the bearing plate 22a and against the spring force of the coil spring 25, that is, while compressing the coil spring 25. It moves forward via a group of lower rollers 27.

Therefore, the backrest substrate 2 having the backrest 23a
3 tilts rearward depending on the degree of retraction of the plunger 8a.

(For example, it is tilted as shown in Fig. 3.) At the same time as the above operation, the longitudinal moving plate 13 moves forward via the rear long axis 24, that is, it moves to the right in Figs. 1 and 2. , according to this movement, the first interlocking plate 11 moves along the front longitudinal axis 1.
4 as a fulcrum and rotates counterclockwise.

According to the rotation of the first interlocking plate 11, the upper leg underseat base plate 4 tilts upward with the hinge 6 as a fulcrum via the operating plate 17, and the lower leg underseat base plate 5 also tilts upward with the hinge 7 as a fulcrum via the second interlocking plate 12. Tilt upward as a fulcrum.

Next, from this state, the plunger 8a of the hydraulic cylinder 8
By advancing the mechanism, the various mechanisms operate in the opposite manner to the above and return to their original positions as shown in FIG.

Although one embodiment of the present invention has been described above, the present invention is not limited thereto, and the design may be modified as follows.

(I) Instead of the upper roller group 26 and the lower roller group 27, an arcuate guide frame may be provided.

(II) Move the backrest board 23 to the movable arc plate 22
Sometimes it is formed integrally with.

That is, the upper part of the movable arcuate plate 22 may be extended to serve as a backrest base plate.

(III) Since the coil spring 25 is merely an auxiliary element, it may not be used.

(IV) The lower leg underseat base plate 5 may be molded integrally with the upper leg underseat base plate 4, that is, may be rendered inoperable without using the hinge 7.

As mentioned above, the backrest is 30 degrees.
Not only when the patient is tilted to a certain degree, but even when the patient is tilted by a large degree, for example, 60 to 90', the patient will not be forced into an unreasonable posture, and therefore the patient will not feel tired even during continuous long-term treatment. In addition, the backrest can be tilted steplessly and the tilted position can be firmly maintained.Furthermore, in the present invention, a single hydraulic cylinder is used to control various mechanisms, that is, the movable circle for the backrest. The arc-shaped plate, upper leg underseat board, and related mechanisms are configured to be operable, making it compact and useful for energy conservation.

In addition, by simply moving the plunger of the hydraulic cylinder back and forth in a plane, the backrest can be made upright or tilted down to a desired degree. By being able to convert the rotational movement in the direction, the initial cost and running cost can be reduced accordingly, and it is also mechanically reasonable and has the effect of increasing the service life. .

[Brief explanation of drawings]

The drawings show an embodiment of the actuating device in the dental chair according to the present invention, and FIG. 1 is a plan view, and FIG.
A line sectional view, and FIG. 3 is a longitudinal sectional view showing the same operating state as above. 3...Buttock undersheet board, 4...
・Upper leg underseat board, 5... Lower leg underseat board, 8... Hydraulic cylinder, 8a.
... Plunger, 11... First interlocking plate, 12... Second interlocking plate, 13... Front-rear moving plate, 14... Front long axis, 17... Actuation plate, 20... Protruding piece, 22... Movable circular arc plate, 23... Backrest board, 24...
・Rear long shaft, 26... Upper roller group, 27.
...Lower roller group.

Claims (3)

[Scope of utility model registration request] (1) A buttock underseat board is provided on the vertical movement device provided on the base board, and an upper leg underseat board that has a rotatable lower leg underseat board is rotated in front of the buttock underseat board. Furthermore, a hydraulic cylinder whose base is pivotably supported and can freely rotate up and down is provided, so that the base of the movable arc-shaped plate having the backrest base plate can be rotated by the plunger of the hydraulic cylinder via the rear long axis. a guide member for moving the movable arc-shaped plate along the arc; one end of the longitudinal moving plate is rotatably provided on the rear long axis, and the other end of the longitudinal moving plate is provided with a guide member for moving the movable arc plate along the arc. One end of the first interlocking plate is rotatably provided, and the other end of the first interlocking plate is rotatably attached to the other end of the operating plate, one end of which is rotatably provided on the upper leg underseat base plate. An actuating device in a dental chair, characterized in that it can be provided. (2) The operating device for a dental chair as claimed in claim 1, wherein the guide member comprises an upper roller group and a lower roller group. (3) The lower leg underseat board is rotatably provided on the upper leg underseat, and one end of the second interlocking plate is rotatably provided in the middle of the actuating plate, and the other end of the second interlocking plate is rotatably provided on the lower leg underseat. The operating device for a dental chair according to claim 1, which is rotatably provided on a protrusion fixed to an underseat base plate.