EP1652505B1 - Treatment chair, particularly dental treatment chair - Google Patents

Abstract

The chair (1) has a chair frame (2), a seat (3), a movable armrest (7), a seat height adjustment mechanism (12), and an inclination adjustment mechanism (24) interposed between the seat and the height adjustment mechanism. The inclination adjustment mechanism alters the inclination of the seat with respect to its rear.

Description

A treatment chair of the present type is in the DE 34 38 617 A1 described. It is in the known treatment chair to a dialysis chair with a seat part, at the front end of a leg rest is mounted up and swiveled and at the rear end of a Rückenlehen is mounted and pivoted up. In order to easily pivot the backrest and the legrest in a substantially horizontal position, the backrest and the legrest are interconnected by an arcuate and the seat part under cross-connecting element causes a simultaneous forced movement of the legrest and the backrest.

document US 3,596,982 discloses a treatment chair with all the technical features of the preamble of claim 1.

It is also known that the seat part of a treatment chair can be made height-adjustable by a height adjustment device in order, for. to be able to adjust different treatment heights. It is also known to adjust the seat part in a tilt position with a sloping back slope.

The invention has for its object to improve the inclination adjustability of the seat part and the leg rest in a dental chair of the present type.

In claim 1, features are included that further simplify the design, lead to small and space-saving integratable into the treatment chair configurations and ensure a simple and easy-bodied adjustment functions for the patient.

This object is solved by the features of claim 1. Advantageous developments of the invention are described in the subclaims.

In the treatment chair according to the invention according to claim 4 is arranged between the height adjustment and the seat part an adjusting device for adjusting a tilting position with sloping backwards slope for the seat part and for resetting, wherein the adjusting device is adjustable independently of the height adjustment device.

This configuration makes it possible to adjust the seat part regardless of the height adjustment device with respect to its inclination and reset. In the case where the height adjustment device adjusts the seat part in parallel, it is possible to maintain the respective inclination of the seat part in the height adjustment. For such a height adjustment is a four-joint Parallelogrammhebelanordnung.

• Fig. 1 einen erfindungsgemäßen zahnärztlichen Behandlungsstuhl in einer Einsteigeposition in der Seitenansicht, wobei die sichtbare Seitenwand nicht dargestellt ist;
• Fig. 2 den Behandlungsstuhl in der Vorderansicht, wobei eine Beinauflage teilweise offen dargestellt ist;
• Fig. 3 den Behandlungsstuhl in einer in Richtung auf eine Behandlungsposition verstellte Zwischenstellung in der Seitenansicht;
• Fig. 4 den Behandlungsstuhl nach Fig. 3 in der Vorderansicht;
• Fig. 5 den Behandlungsstuhl in einer weiter in seine Behandlungsstellung verstellten Zwischenposition;
• Fig. 6 den Behandlungsstuhl nach Fig. 5 in der Vorderansicht;
• Fig. 7 den Behandlungsstuhl in seiner Behandlungsposition in der Seitenansicht;
• Fig. 8 die Beinauflage des Behandlungsstuhls nach Fig. 7 in der Draufsicht.

Hereinafter, several advantageous embodiments of the invention will be explained in more detail with reference to several drawing figures. It shows:

• Fig. 1 a dental treatment chair according to the invention in a Einsteigeposition in the side view, wherein the visible side wall is not shown;
• Fig. 2 the treatment chair in the front view, wherein a leg rest is shown partially open;
• Fig. 3 the treatment chair in an adjusted in the direction of a treatment position intermediate position in the side view;
• Fig. 4 after the treatment chair Fig. 3 in front view;
• Fig. 5 the treatment chair in a further adjusted in its treatment position intermediate position;
• Fig. 6 after the treatment chair Fig. 5 in front view;
• Fig. 7 the treatment chair in its treatment position in the side view;
• Fig. 8 the leg rest of the chair after Fig. 7 in the plan view.

The treatment chair, denoted by 1 in its entirety, has a head end 1a, which faces a foot end 1b in the longitudinal direction of the treatment chair 1. In the Fig. 2 shown vertical longitudinal center plane of the treatment chair 1 is denoted by E.

The main parts of the treatment chair 1 are a support frame 2 which can be set up on the floor, a seat part 3 which is arranged in the upper region of the support frame 2, a flat leg support 4 which can be pivoted upwards and downwards by a hinge 5 with a horizontal hinge axis 5a the seat part 3 is connected, a flat foot rest 6, which is displaceably mounted on the leg rest 4 in its longitudinal direction and can be pushed out beyond the free end of the leg rest 4, a back rest 7 which is deflected by a joint 8 with a horizontal articulation axis 8a. and swiveling connected to the treatment chair 1 or attachments thereof.

The seat part 3, the leg rest 4 and the backrest 7 form a Stuhloberteil 11 which is supported by a Höhenverstellvorrichtung 12 adjustable in height on the support frame 2, which in the embodiment a parallelogram with an upper and a lower Parallelogrammhebel 13a, 13b, in two superimposed arranged front parallelogram joints 14, 15 are mounted up and down pivotally mounted on the support frame 2, for example, between two lateral vertical support walls 16 of the support frame 2 of which in Fig. 1 only one support wall 16 is visible. The rear ends of the Parallelogrammhebel 13 a, 13 b are connected in two rear and superimposed joints 17, 18 mounted with two lateral supports which extend upwards to the seat part 3 and the rear Wear end area. This four-joint parallelogram linkage can be raised and lowered by an adjusting motor (not shown), eg a hydraulic cylinder or an adjusting spindle, with the upper part 11 supported thereon, for example to adjust the height of the seat part 3.

In addition, the seat part 3 is adjustable by a tilt adjustment either up and down in a tilt position with sloping backwards slope. For this purpose, an adjusting device 22 may be provided, which is preferably also provided for pivoting up and down the leg rest 4. It is also provided in particular a common adjusting motor for simultaneous adjustment of the seat part and the leg rest 4, which will be described below.

It is also advantageous to combine the inclination adjustment of the seat part 3 with the adjustment of the backrest 7 so that an adjusting device 23 for adjusting the seat part 3 and the backrest 7 is used. Also for these two simultaneous adjustment movements, a common adjusting motor can be provided.

In the embodiment, for adjusting the seat part 3, the leg rest 4 and the backrest 7 a common, designated in its entirety by 24 adjustment provided so supported by the Höhenverstellmechanismus 12 and arranged that in each height adjustment by the height adjustment mechanism 12, the seat part 3 in the intended inclination position is adjustable, preferably simultaneously with the leg rest 4 and the backrest 7 is adjustable, with a common adjusting motor 25, with the seat part 3 and the leg rest 4 and / or the seat part 3 and the backrest 7 with the Seat part 3 are adjustable in its tilt position.

In the embodiment, the upper part of the chair 11 is adjustable by the adjusting device 24 with the adjusting motor 25, so that participate in the inclination adjustment of the seat part 3, the leg rest 4 and the backrest 7 and adjusted simultaneously. In addition, the leg rest 4 and / or the backrest 7 can be adjusted simultaneously by the adjusting device 22 and / or 23.

The adjusting device 24 has a lever 31, which is designed in the sense of a broad lever extending in the transverse direction of the treatment chair 1 and by a arranged in the rear lower portion of the support frame 2 joint 32 about the horizontally and transversely extending hinge axis in the vertical longitudinal center plane E pivotable with the Parallelogrammhebel 13b and thereby with the support frame 2 is connected. The lever 31 extends upwardly from the hinge 32 and is pivotally connected at an upward distance a from the hinge 32 by a hinge 33 with a hinge axis extending parallel to the hinge axis to a support member 34 also formed in the transverse direction as a broad part is and with two carrier side walls 34a, the lever 31 can overlap. The support member 34 is pivotally connected in a hinge 36 with the joints 31, 33 parallel hinge axis with the support frame 2 and thereby supported thereon. In the embodiment, the support member 34 is connected by the hinge 36 with the rear end portion of the upper parallelogram lever 13a. The support member 34 also has two lateral side walls 34 a, which extend upwards and forwards and support the seat part 3. The upward distance b of the joint 36 from the joint 32 is denoted by b.

The joints 17, 36 on the one hand and the joints 18, 32 on the other are each arranged coaxially.

The upwardly extending from the hinge 32 lever 31 is pivotally connected in its upper region by a hinge 37 with the above-described joints also parallel hinge axis with a push rod 38 which extends under the seat part 3 forward and at its front end by a Joint 39 at a distance c from the hinge axis 5a connected to the leg rest 4.

The upper end of the lever 31 is connected by a hinge 41 to a connecting lug 42 which is connected by a hinge 43 to a circular arcuate curved segment 44 which is curved about the hinge axis 8a and in a corresponding bowing guide 45, e.g. a roller guide is slidably mounted. The curve segment 44 and the guide 45 form the joint 8, by which the backrest 7 is mounted on the upper part 11 of the chair. The guide 45 is disposed on the associated support side wall 34a.

The adjusting motor 25 is an elongated component and formed for example by a hydraulic cylinder or a spindle motor with an adjusting rod 25a. In the embodiment, the elongated adjusting motor 25 is connected at its front end by a hinge 46 vertically pivotally connected to the front end portion of the support member 34. The rear end of the adjusting motor 25 is connected by a hinge 47 vertically pivotally connected to the lever 31, which is arranged for example in the middle height range of the lever. In the embodiment, the adjusting motor 25 is below the push rod 38. In this case, these two parts be laterally offset from one another. In the exemplary embodiment, the push rod 38 is arranged centrally while the adjusting motor 25 is arranged laterally offset.

The hinge 39 between the push rod 38 and the leg rest 4 is preferably arranged on a sliding carriage 51 which is slidably mounted in a longitudinal guide 52 in the leg rest 4 and connected to the foot rest 6, so that when moving the slide 51 forward or ., the footrest 6 is pushed back and forth to the rear.

The function of the adjusting device 24 for setting a sloping rearward inclination of the seat part 3 will be described below.

The treatment chair 1 is in its position according to Fig. 1 in the boarding position, in which the leg rest 4 is pivoted downward, the backrest 7 is pivoted upwards, and a patient sits down on the treatment chair 1. In this entry position, the seat part 3 is in its lowest position, in which it extends, for example, substantially horizontally. The adjusting motor 25 is in its extended position.

When the adjusting motor 25 is turned on in this position or pivots the lever 31 in the joint 32 to the front, the lever 31 rotates the support member 34 by the hinge 33 therebetween in the counterclockwise direction around the joint 36. As a result, the support member 34 and the upper part of the chair 11 after pivoted at the rear, whereby it assumes a sloping sloping position. Fig. 3 shows such an intermediate position in which the leg rest 4 is slightly swung up, for example, by about 45 °, the footrest 6 is pushed out by a piece, for example, about half Ausschubweg or something more, and the backrest 7 is slightly pivoted.

Fig. 5 shows a further highly tilted tilt position of the seat part 3 or upper part 11, in which the leg rest 4 is further swung, for example, by about 60 °, in which the footrest 6 is further extended, preferably fully extended, and the backrest 7 by a further angular amount is pivoted.

In the treatment position according to Fig. 7 closes the seat part 3 with its initial position according to Fig. 1 or with the horizontal, an inclination angle W of about 10 ° to 20 °, in particular about 15 ° to 16 °, with the leg rest 4 is in its raised position in which they forward something is inclined, and the backrest 7 is in its pivoted end position in which it can extend, for example, horizontally. K is a headrest K, which is connected to the free end of the backrest and supported thereon.

It is advantageous to design the ejection mechanism for the footrest 6 in such a way that it quickly extends its ejection path in a first region and extends more slowly on the remainder of its ejection path. It is particularly advantageous if the footrest 6 extends quickly in the region of its first 2/3 way and then extends more slowly. As a result, the feet of the patient are initially supported faster when tilting in the tilt position. Moreover, this ensures that the patient feels only a minimal ejection movement on his feet.

It is therefore advantageous to provide a slotted guide 48 in the front end region of the push rod 38 between it and the seat part 3, which brings about an increasing distance between the push rod 38 and the seat part 4 when advancing the push rod 38. There is a laterally open slide groove 48a provided in the push rod 38, in which a slotted link 48b is slidably mounted, which is rotatably mounted on a seat part 3 downwardly projecting bracket 48c. The slide guide 48 is inclined in its front region to the front and down, while extending from the rearwardly extending larger longitudinal portion of the slide guide 48 may extend approximately parallel to the seat part 3 and horizontally.

In the embodiment, the push rod 38 is formed in its front end region roof-shaped or bent upwards.

Between the sliding carriage 51 and the footrest 6, a motion transmission gear 53 is arranged to achieve a relatively large displacement of the push rod 38 a larger Ausschubweg the footrest 6. This transmission gear can also be designed so that it generates a relatively large Ausschubgeschwindigkeit in the first region of the Ausschubbewegung and reduces the Ausschubbewegung in the other end.

An above-described motion translation can be achieved by a lever linkage translating the movement, which is arranged between the sliding carriage 51 and the footrest 6. In the embodiment, two-armed lever 54, 55 pivotally mounted with their outer ends by a respective joint 54 a, 55 a in the opposite outer side regions on a support wall 56 which is fixed in the leg rest 4 under the footrest 6. Of these laterally outer joints 54a, 55a, the levers 54, 55 extend toward the center, wherein they overlap and the lower lever 54 extends beyond the sliding carriage 51, is connected in its central region by a sliding guide 57 with the slide 51 and in its end remote from the hinge 54a end region is connected by a link guide 58 with the central region of the other lever 55. The latter lever 55 extends toward the center of the footrest 6 and is connected, for example, in its middle region by a third slide guide 59 with a guide plate which is connected to the footrest 6 or is formed by this. In this case, the first lever 54 extends substantially transversely to the footrest 6, while the second lever 55 extends obliquely to the rear.

The slotted guides 57, 58, 59 are each formed by a slot 62, 63, 64 in the levers 54, 55 and in the guide plate, in which a preferably each formed by a roller slide link 65, 66, 67 is movably mounted. The slot 62 in the first lever 54 extends angularly with a first transversely directed and an adjoining obliquely to the hinge 54a side facing away and forwardly extending portion. The slot 63 in the second lever 55 and 64 in the guide plate preferably extends transversely to the longitudinal center plane E.

When advancing the slide 51, the first lever 54 is pivoted forward, wherein it pivots the second lever 55 translated forward due to a by the distances of the slotted guides 57, 58 from its joint 54a movement translation. Another movement translation takes place between the second lever 55 and the guide plate due to the different distances of the sliding guide 58, 59 instead.

The above-described translation device 53 with levers 54, 55 in the form of flat discs allows for low construction, the arrangement of the slide guides 57, 58, 59 and a good and durable function.

Claims (18)

1. A treatment chair (1), in particular dental-medical treatment chair, having a carrier frame (2), a seat part (3), a leg rest (4), which is mounted upwardly and downwardly pivotably in the forward end region of the seat part (3), a backrest (7), which is mounted downwardly and upwardly pivotably in the rearward end region of the seat part (3) or of the carrier frame (2), and a height adjustment device (12) for the height adjustment of the seat part (3), wherein the seat part (3) can be adjusted into an inclined position with a rearwardly downwardly sloping inclination, and for the adjustment of the seat part (3) and the pivoting of the leg rest (4) a common adjustment motor (25) is provided, which upon an adjustment of the seat part (3) into the inclined position pivots the leg rest upwardly,
   wherein a footrest (6) is movably mounted on the leg rest (4),
   characterized in that
   the footrest (6) is mounted on the leg rest (4) displaceably in the longitudinal direction thereof, and the adjustment motor (25) also displaces the foot rest (6).
2. A treatment chair according to claim 1,
   characterized in that
   also the backrest (7) is pivotable upwardly and downwardly with the adjustment motor (25).
3. A treatment chair (1) according to claim 2,
   characterized in that
   upon an adjustment of the seat part (3) into the inclined position the adjustment motor (25) pivots the backrest (7) in the direction towards its lower pivot position.
4. A treatment chair according to one of the preceding claims,
   characterized in that
   the adjustment motor (25) is part of an adjustment device (24) which can be actuated independently of the height adjustment device (12).
5. A treatment chair according to one of the preceding claims,
   characterized in that
   the seat part (3) is mounted upwardly and downwardly pivotably around a joint axis arranged in its rearward end region.
6. A treatment chair according to claim 4 or 5,
   characterized in that
   the adjustment device (24) has a carrier part (34) which is pivotably mounted on the height adjustment device (12) by means of a joint (36) having a horizontally and transversely running joint axis, and carries the seat part (3).
7. A treatment chair according to one of the preceding claims,
   characterized in that
   the height adjustment device (12) is formed by means of a four-bar parallelogram lever arrangement.
8. A treatment chair according to claim 7,
   characterized in that
   the four-bar parallelogram lever arrangement has two joints (14, 15) arranged in the forward region of the treatment chair one above the other, by means of which it is supported on the carrier frame (2), and has two joints (32, 33) arranged in the rearward region of the treatment chair one above the other.
9. A treatment chair according to claim 8,
   characterized in that
   the carrier part (34) is pivotably mounted in one of the two rearward joints (32, 33), in particular in the upper joint (33).
10. A treatment chair according to one of the preceding claims 4 to 9,
    characterized in that
    the adjustment device (24) has a lever (31) arranged in the rearward end region of the carrier frame (2), which lever is pivotably mounted on the carrier frame (2) by means of a joint (32) having a horizontally and transversely running joint axis.
11. A treatment chair according to claim 10,
    characterized in that
    the joint (32) is formed by means of the rearward and lower joint of the four-bar parallelogram lever arrangement.
12. A treatment chair according to claim 10 or 11,
    characterized in that
    the lever (31) is pivotably connected with the carrier part (34) by means of a joint (33), which is arranged between the joint (32) mounting the lever and the joint (36) mounting the carrier part (34).
13. A treatment chair according to one of the preceding claims 4 to 12,
    characterized in that
    the adjustment device (24) has a push rod (38) which extends forwardly under the seat part (3), is longitudinally displaceably mounted and at its forward end is pivotably connected with the leg rest (4) by means of a joint (39).
14. A treatment chair according to claim 13,
    characterized in that
    the push rod (38) is pivotably connected in its rearward end region with the lever (31) by means of a joint.
15. A treatment chair according to claim 13 or 14,
    characterized in that
    between the seat part (3) and the push rod (38) there is arranged a connecting link guide (48) having a link groove (48a) inclined at least in a section or sections, which groove upon a longitudinally directed displacement of the push rod (38) brings about a height adjustment of the seat part (3).
16. A treatment chair according to one of the preceding claims,
    characterized in that
    the joint (8) arranged between the seat part (3) and the backrest (7) is formed by means of an arc guide (45) in which an arc segment (44) carrying the backrest (7) is displaceably guided.
17. A treatment chair according to claim 16,
    characterized in that
    the lever (31) is pivotably connected in its upper end region, by means of a joint (41), with a connection bracket (42) which is pivotably connected by means of a joint (43) with the arc segment (44).
18. A treatment chair according to one of the preceding claims 10 to 17,
    characterized in that
    the lever (31) is pivotable back and forth by means of the preferably elongate adjustment motor (25), which is preferably arranged below the seat part (3).

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