DE1766374A1 - Device on treatment chairs - Google Patents

Description

Gunnar Ingemar Sigvard Osbeck Vasaplatsen 4, Gothenburg

Device on treatment chairs.

The present invention relates to a device in particular for the dental treatment of Patients provided chairs with a column that can be raised and lowered, the upper end of which is formed into a head that carries a seat, at the rear edge of which a backrest and at the front edge of which a leg rest is articulated, which is articulated via articulated arms with articulated armrests on the backrest in such a way that when pivoting the backrest is swiveled backwards and downwards, the legrest is swiveled upwards forwards.

The characteristic of the invention is that the seat relative to the column head about a horizontal axis (bolt) is pivotable that the column head with a forward facing Extension part and the leg rest is provided with a rearward-facing arm and that these two parts with Interlocking sliding guide organs are equipped. Thanks to the sliding guide elements arranged in the specified manner, the seat of the treatment chair becomes as it swings back the backrest and the resulting

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Swiveling the leg rest forward around the mentioned horizontal axis so that the front edge of the seat is slightly is raised. In this way, a sitting or lying position that is particularly suitable for treating the patient is achieved. The fact that the seat is raised slightly also prevents the patient from walking forward on the seat during treatment slide.

It is a further development of the invention the extension part of the column head in different inclinations with respect to the column in one of the longitudinal axes of the same adjustable vertical plane. This makes it possible both with the backrest swiveled up and down to choose the right inclination of the seat.

The invention is illustrated in more detail below with reference to the attached drawings. Show it:

Fig. 1 is a vertical longitudinal section through a

Treatment chair according to the invention with swiveled up Backrest,

Fig. 2 is a side view of the chair with the lying position swiveled down backrest, Fig. 3 a partially illustrated in horizontal section Top view of the chair with the upholstery and paneling removed for clarity same,

4 shows, on a larger scale, a side view of the chair seat and the leg rest with these associated parts in the seated position;

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Pig. Figure 5 is a similar side view with the chair seat and the leg rest in the lying position,

tig. 6 and 7 side views corresponding to FIGS. 4 and 5 , but with the chair seat in such a position that its front edge is located lower,

Pig. 8 shows a vertical section along the line VIII-VIII in FIG. 4,

Pig. 9 shows a vertical section along the line IX-IX in FIG

Pig. 5,

Pig.10 a perpendicular section along the line X-X in Pig. 6 and

Pig. 11 a vertical section along the line XI-XI in Pig. 7th

The main parts of the treatment chair illustrated in the drawings consist of a seat 1, one with this at its rear edge articulated backrest 2 and a leg rest 3 articulated to the seat at its front edge, and an articulated foot at the lower front end of the leg rest. The joint between the seat 1 and the Backrest 2 is numbered 5, the hinge between the seat 1 and the The leg rest 3 is indicated by 6 and the joint between the leg rest 3 and the pus support 4 is indicated by 7. The support frame δ des Seat 1 is raised by two horizontal, coaxial stub axles 9 around the upper end formed to form a head 10 and lowerable column 11 pivotable. Double-armed lever rods 13 can be pivoted around horizontal, coaxial bolts 12 on the support frame 8 stored, which are articulated at their upper end to the front end of the Armstutζen, which theiraeJtu with the

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Backrest 2 are articulated together. The lower end 15 of the

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Lever rods 13 are articulated to the leg rest via a joint 16 tied together. Thanks to the articulated connections, when the leg rest 3 is pivoted forward and upward, the pivoting of the Backrest 2 causes backward downward.

The column head 10 is formed with a forward-facing part 17, at the other end a U-shaped extension part 20 is mounted pivotably about two horizontal, coaxial pins 18 with the legs 19 directed to the rear. This is provided with a straight guide 21 directed forward, in which one at the free end of a rearward directed Arm 23 of the leg rest 3 arranged roller 22 is running.

The forward portion 17 of the column head 10 is equipped with a downwardly directed nose 24 on which an internally threaded nut 26, which is passed by a screw spindle 27, to horizontal coaxial, pin 25 is rotatable. The screw spindle 27 is by a motor 28, for example by a hydraulic motor, the housing 29 of which is connected to the leg rest 3 by means of a bolt 30 is articulated, driven.

When the engine 28 is started and the screw spindle 27 as a result screws itself forward relative to the nut 26 , the leg rest 3 is pivoted upwardly forwards and the kink glue 2 is pivoted downwards to the rear via the joints 16, lever rods 13 and arm rests 14. While swiveling the leg rest forwards and upwards around there:.; Joint 6 around, there is also a rotary movement around the hollow 22, which at the same time; in which you su ^ cord-

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Neten straight guide 21 slides forward. Dieaes carries with it that the joint 6 and thus also the front edge 31 of the chair seat 1 is raised. If by switching the direction of movement of the motor 28 the screw spindle 27 in opposite Direction is driven, the leg rest 3 while erecting the backrest and at the same time sliding backwards the roller 22 in the straight guide 21, which means that the hinge 6 and the front edge 31 of the seat 1 are lowered again is pivoted backwards downwards.

In order to set the desired backward inclination "of the seat 1, the U-shaped extension piece 20 is adjustable in different inclination positions around the pin 18, by means of an adjustment screw 33 and a locking screw 32, the extension part 20, such as from I ¹ Xg. 8, 9, 10 and 11 are adjustable or can be fixed in different inclination positions The higher the straight guide 21 is located during this adjustment, the higher the front edge 31 of the seat 1 will be.

The embodiment shown and described is only (8 to consider as an example and the different parts of the Treatment chair can be structurally changed within the scope of the following claims. For example, it is possible to use the Straight guide 21 on the rearward-facing arm 23 of the leg rest 3 to arrange and to attach the roller 22 at the front end of the U-shaped extension part 20, by the way, the roller can also be replaced by a stationary pin or by a slider.

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Claims (5)

Patents 1 / Device on chairs especially intended for the dental treatment of patients with a lifting and lowerable column (11) the upper end of which is formed into a head (10) carrying a seat (1) at the rear edge thereof a backrest (2) and at the front edge (31) of which a legrest (3) is articulated, which is connected by articulated arms (16, 13) with articulated armrests on the backrest (H) is articulated in such a way that when the backrest is pivoted backwards and downwards, the leg rest (3) forwards is pivoted upwards, characterized in that the seat (1) opposite the column head (10) around a horizontal Axis (bolt 9) is pivotable that the column head (10) with a forward extension part (20) and the leg rest (3) is provided with a rearward-facing arm (23) and that these two parts (20, 23) with interlocking Slide guide organs are equipped. 2. Device according to claim 1, characterized in that the sliding guide members partly consist of a roller (22), pin or the like arranged at the inner end of the arm (23) of the leg rest (3). and partly from a at the front end of the extension part (20) of the column head (10) arranged, forwardly directed degree guide (21) , in which the roller (22) or the like. slidable while pivoting the leg rest 109830/0648
is. 3. Modification of the device according to claim 2, characterized in that the roller (22) or the like. at the front end of the extension part (20) of the oäulenkopfes (10) and the straight guide (21) is arranged at the rear end of the rearward-facing arm (23) of the leg rest (3). 4 ο device according to one of the preceding claims, characterized in that the extension part (20) of the column head (10) in different inclined positions opposite the column (11) in one of the longitudinal axis of the same traversing vertical plane is adjustable. 5. Apparatus according to claim 4, characterized in that that the extension part (20) at its rear The end can be pivoted about a horizontal axis (18) through the column head (10) 'and can be fixed to it in the desired position of inclination is. 1 09830/0648