JPS6034254Y2 - Rotating device for tray table in dental treatment machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tray table rotating device in a dental treatment machine.

With conventional dental treatment machines, when an operator performs dental treatment on a patient while sitting in a chair, the operator can view the treatment position from the side of the patient, or over the patient's head. When changing the treatment position, when the surgeon rotates the chair unit and then moves the tray table, the tray table may not rotate to a position suitable for treatment, or the tray table may collide with the chair unit. There were drawbacks that interfered with dental treatment.

According to Japanese Utility Model Application Publication No. 56-135731, the table is attached to the patient chair regardless of the operator's chair, so the operator must adjust the operator's chair while comparing the direction of the table and the direction of the patient chair. must be drawn toward the table.

Therefore, there is a drawback that the mutual relationships between the operator, the patient, and the table become disorganized, making it impossible to carry out treatment operations quickly.

Furthermore, since the table does not have a one-touch rotation stopper, the only way to do so is to keep the table fixed, which makes it inconvenient to handle treatment instruments, prosthetic materials, etc. placed on the table, and has the drawback of reducing the efficiency of treatment work.

Furthermore, if the installation floor of the apparatus disclosed in the publication is inclined, there is a risk that the tray arm may flow along the lower inclined surface due to the movement of the center of gravity of the tray.

In addition, in the method disclosed in Japanese Utility Model Application Publication No. 54-69698, since the arm of the tray is attached to the side of the operator's chair, when the floor surface is inclined, the rotation stop position of the operator's seat cannot be adjusted. This has the disadvantage that the rotation stop positions of the work table become inconsistent, which impairs the operator's work efficiency.

In addition, in the case disclosed in Yume Publication No. 54-6659, the cabinet is fixed to a pedestal and is separated from the operator's chair, resulting in poor workability for the operator as described above.

In addition, in Japanese Utility Model Publication No. 39-25197, the unit body is attached to a column by itself so that it can rotate around the column by an intermediate support arm and a support arm, regardless of the rotation of the operator's chair. Therefore, the operator's workability will not be improved.

Furthermore, in Japanese Utility Model Publication No. 50-28638, the support rod to which the holding member is attached is held in its rotational position by a pin that is elastically supported by a spring of the drawer rod.
Because the holding member is moved forward and backward independently of the surgeon's chair,
There is a drawback that the operator's workability is not good.

The present invention is a device for rotating a tray table in a dental treatment machine, which has been proposed in order to eliminate the drawbacks of the conventional method.

That is, in the present invention, the operator's chair unit and the link are rotatably attached to one end of a fixed plate fixed on the floor by a support shaft, and the actuating plate is connected to the other end of the link. One end of the tray arm is connected to the protrusion provided so as to rotate by a predetermined amount in accordance with the rotation of the link, and a tray table is attached to the support provided protruding from the other end of the tray arm, thereby completing the chair unit. The rotation of the tray table in a dental treatment machine is designed so that when the operator rotates the tray table and then rotates the tray table with a single touch, the tray table can always be placed on the side of the operator. This is the invention of the device.

This can be explained with reference to the drawings as follows.

In the attached drawings, reference numeral 1 denotes a chair unit for the operator which contains the tools necessary for the treatment, and the chair unit is placed on the floor below the center of the head rest of the dental treatment table 5, with one end of the flat part of the chair unit being placed on the floor. The end portion is pivotally attached to a fixed plate 9 with a first support shaft 4, one end of the link 2 is rotatably attached to one end of the fixed plate 9 with a second support shaft 3, and the other end of the link 2 is Actuation plate 10 at the end
One end is pivoted, a protrusion 6 is implanted on the lower surface of the other end of the actuating plate 10, a groove B is bored in the protrusion 6, and the protrusion 6 is inserted into the through hole C of the tray arm A. After inserting the ball 15 and the coil spring 1 into the screw hole 14 carved on the side of one end of the tray arm A.
Finally, the set screw 17 is screwed into the screw hole 14, and the operator chair unit 1 and the link 2 are rotated separately, and the actuating plate 10 and the tray arm A are rotated in the normal position. If a force exceeding a predetermined degree is applied, the coil springs 16 are formed to extend against the elastic force of the coil spring 16.

The lower end of a support 7 is protruded from the upper surface of the other end of the tray arm A, the lower surface of the tray table 8 is fixed above the support 7, and the operator rotates the chair unit 1 to the treatment position while sitting on the chair 11. 1, and then the tray table 8 is moved as shown by the dashed line in FIG.

That is, the free end of the link 2 is designed to always extend to the side of the chair 11, and the tray arm A is attached to the link 2 via the actuation plate 10 so as to be perpendicular to the chair unit 1. By providing the tray table 8 on the support 7 provided on the arm A, the tray table 8 can always be rotated to the side of the operator.

In the figure, reference numeral 12 is a backrest, and 13 is a patient's upper body rest, and one end of the upper body rest 13 is connected to the treatment table 5 by an air cylinder or the like so that it can be raised and lowered.

Note that when the flat end portion of the chair unit 1 is pivoted to the fixed plate 9, the rotation range of the chair unit 1 can be determined.

As described above, the present invention has a chair unit 1 which is a stepped chair 11 for a surgeon, and a fixing plate 9 attached to a position near the flat part of the chair unit 1.
is pivoted on the floor with the first support shaft 4, and the link 2 is attached to the fixed plate 9.
One end is pivotally attached to the second support shaft 3 so that the centers of rotation radii of the operator's chair unit 1 and the link 2 are close to each other, and the operating plate 10 is attached to the link 2. Actuation plate 1
A coil spring 16 connects the protrusion 6 provided at 0 and the tray arm A.
, while maintaining the tray arm A in a predetermined state in conjunction with the rotation of the link 2 by a coupling mechanism such as a set screw 17,
Since the tray table 8 can be rotated to a position suitable for the operator's treatment by this interlocking operation, the operator can rotate the chair unit 1 in the desired direction together with the link 2 while sitting on the chair 11, and then The tray table 8 can be correctly rotated to the most convenient position for the treatment near the operator, and the efficiency of the treatment can be improved.

Furthermore, since the tray table 8 always maintains a predetermined position relative to the chair unit 1, the operator may pull the tray table 8 closer to the chair unit 1 when the tray table 8 is far away from the chair unit 1, or when the tray table 8 approaches the chair unit 1. This eliminates the complicated work of releasing the device when the device is too strong, reducing operator fatigue and increasing work efficiency.The mechanism is simple and there are fewer failures (it also operates accurately).

[Brief explanation of the drawing]

Fig. 1 is a plan view of the present invention showing the operating state, Fig. 2 is an enlarged perspective view of the operating mechanism shown unfolded, and Fig. 3 is a plan view of the present invention showing the tray table moved diagonally to the rear of the chair unit. The plan view and FIG. 4 are side views showing the relationship between the chair unit and the tray table. 1...Chair unit, 2...Link, 3...Second spindle, 4...First spindle,
5... treatment table, 6... protrusion, 7...
... Prop, butt ... Tray table, 9...
... Fixed plate, 10... Actuation plate, 11...
・Chair, 12... Backrest, 13...
Upper body rest part, 14... Screw groove, 15... Ball, 16... Coil spring, 17...
Set screw, A...Tray arm, B...
Concave groove, C......through hole.

Claims (1)

[Scope of utility model registration request] On the floor below the center of the head rest part of the dental treatment table 5,
The operator's chair unit 1 is pivoted to a first support shaft 4 protruding from a fixed plate 9, the link 2 has one end pivoted to one end of the fixed plate 9 by a second support shaft 3, and the other link 2. An actuating plate 10 is provided with a protrusion 6 having one end pivoted and a recessed hole B, which is pivoted on the other end with a shaft, and a through hole C in which the protrusion 6 is fitted in one end. A screw hole 14 opened toward the hole C, a ball 15 fitted into the screw hole 14, a coil spring 16, and the screw hole 14
A tray table rotation device in a dental treatment machine, comprising a tray arm A having a set screw 17 screwed into the tray arm A, a support 7 protruding from the other end of the tray arm A, and a tray table 8 attached to the tip of the support 7.