DE20307043U1 - Child's high chair has U-shaped frame whose lower section forms foot which is at angle to arms, foot rest, seat, table and back rest being mounted on arms using sleeves with frictional fastening - Google Patents

Abstract

The child's high chair has a U-shaped frame (1) whose lower section forms a foot which is at an angle to the arms. A foot rest (5), seat (4), table (3) and back rest (2) are mounted on the arms using sleeves (6) with frictional fastening. These allow the heights of the fittings to be adjusted independently.

Description

Continuously height-adjustable, universally adaptable chair.

The invention relates to a continuously height-adjustable chair whose lower ends end in supports and extend upwards into two lateral stands, which serve to attach a footrest, a seat, a play surface, a backrest and/or other components that can be combined individually or in different ways and are individually and independently of one another designed to be continuously height-adjustable.

DE 2421259 discloses a height-adjustable children's chair consisting of 2 side posts with grooves in the inside of the side posts to accommodate a seat, a footrest and a play board and at the lower ends of the side posts which are designed as supports. The disadvantage is the height adjustment, which can only be carried out in predetermined steps. A change in the step can only be achieved by replacing the two side posts. Another disadvantage is the limited usability. Such a chair is not advantageous for use in the work area due to its visual effect, low stability and low variability.

Experts are familiar with other height-adjustable chairs that are continuously adjustable or adjustable in steps, including work chairs, standing chairs, sitting chairs and children's chairs. The chairs are adapted in shape and construction to the respective use and cannot be used for any purpose other than the intended purpose, or can only be used to a limited extent or with great effort.

The invention is based on the object of creating a continuously height-adjustable chair which solves the known problems such as the ability to be converted to different uses as a play chair for children from around 1 year of age; work chair and stand-sit chair, combined with the continuously height adjustment of the individual conversion components, consisting of a carrier (1) which ends in supports and at the top in 2 side stands, and which can be used as a basic unit for a child's chair, work chair and stand-up chair without adjustment and which can be equipped individually or in combination with a footrest, seat, play board and backrest, tailored to the use of the chair, and which can be retrofitted or refitted by the user for further use, and the individual components can be continuously adjusted in height independently of one another and can be moved on the two side stands.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from this description, or may be learned by practice or use of the invention. The object, aspects and other advantages of the invention will be realized and obtained by the structure particularly pointed out in the description and the appended claims, as well as from the accompanying drawings.

To achieve this and other advantages in accordance with the purpose of the present invention as embodied and broadly described, the present invention provides various chair combinations and height adjustments.

Fig. 1 shows a chair according to the invention, equipped for a child from 1 to 3 years. The support (1), preferably made of steel tube, is designed with two lateral supports at the top to accommodate the individually height-adjustable components, such as the backrest (2), play surface (3), seat (4) and footrest (5) and at the lower end, on the chair base, connected to one another, as a chair base.

Fig. 2 shows a chair according to the invention with backrest (2), seat (4) and footrest (5).

Fig. 3 shows a chair according to the invention, with a backrest (2) and a seat (4). This chair can be used universally by children and adults after the height has been adjusted to suit the respective needs.

Fig. 4 shows a chair according to the invention comprising the support (1) equipped with a seat (4). The embodiment shown can preferably be used as a standing-sitting chair.

Fig. 5 shows another chair according to the invention with a
further assembly variant.

The invention is not limited to the embodiments shown in Figs. 1, 2, 3,4, and 5
The combination options shown are limited, if required, height-adjustable armrests, angle-adjustable
Game boards, safety belts and the like are used.

To improve stability, the connection between the two side supports at the lower end of the support (1) designed as a chair stand can be made wider than the distance between the two side supports. To improve stability, it is also advantageous if the angle between the connection of the support (1) designed as a chair stand and the side supports pointing upwards is less than 90 degrees.

Each assembly component is positively connected to one or two height adjusters (6). The connection between the assembly components and height adjusters (6) is not shown. Any conceivable connection such as positively locking, welded, screwed, riveted and other connections are possible.

Figures 6, 7 and 8 show three self-locking frictional clamps for the height-adjustable components. The self-locking frictional connection is designed in such a way that the load force directed towards the component at the lower end of the carrier (1) increases the frictional force between the height adjuster (6) and the respective associated stand and height adjuster (6) on both sides so that the holding force is higher than the load force opposite the frictional force. Manually operable aids (not shown) are provided for the adjustment, which are designed in such a way that the holding force can only be released when the load force approaches 0 and a safety device is activated that prevents unintentional height adjustment. If the aids are not activated, the holding force is automatically built up and the safety device against unintentional height adjustment works independently. The invention is not limited to the embodiments shown in Figures 6, 7 and 8. Other self-locking designs are possible, such as clamping discs, which are preferably used for lifting vehicles. Positive-locking, height-adjustable connections such as threads, ratchet wheels and the like can also be used.
The individual components (2; 3; 4; 5) can be equipped with one or two height adjusters (6). In the case of components with two height adjusters (6), the height adjusters (6) can be coupled in such a way that the holding forces and locks of both height adjusters (6) are actuated simultaneously with a central actuation.
Further details are described in Figures 6, 7, and 8.

Figure 6 shows a self-locking wedge clamp. If a load force acts in the direction of the floor on the component that is connected to the height adjuster (6), the height adjuster (6) is moved 1 to 2 mm in the direction of the floor and analogously increases the frictional force holding force between the side part of the support (1) and the height adjuster (6). The spring force of the adjusting spring (8) acts on the clamping roller (7), which is designed in the height adjuster (6) in a guide with a self-locking angle to the receiving hole for the side part of the support (1), is guided and thus builds up a frictional force between the side part of the support (1) and the height adjuster (6), which increases accordingly with the load force and analogously to the displacement of the clamping roller (7) in its guide against the direction of the load and the angle between the movement plane of the clamping roller (7) and the movement axis of the height adjuster (6) on the associated side part of the support (1). By manually moving the clamping roller (7) against the spring force of the adjusting spring (8), the frictional force between the side part of the support (1) and the height adjuster (6) is removed and the component connected to the height adjuster (6) can be moved on the side part of the support (1). If the manual action on the clamping roller (7) is removed, the adjusting spring (8) pushes the clamping roller (7) in its guide against the wall of the side part of the support (1) and thus restores the self-locking frictional connection between the side part of the support (1) and the height adjuster (6) in accordance with the spring force, the load force and the angle.

Figure 7 shows a self-locking eccentric clamp.
The operating principle is comparable to the principle shown and described in Figure 6. A spring (not shown) rotates the clamping eccentric (9) about its axis of rotation until the self-locking friction force is built up between the side part of the carrier (1) and the height adjuster (6). The friction force built up and released by the clamping roller (7) in Figure 7 through the linear movement of the clamping roller (7) in its guide between the side part of the carrier (1) and the height adjuster (6) is generated in a similar way in Figure 7 by the rotational movement of the clamping eccentric (9).

Figure 8 shows another self-locking clamp.
The clamping bushing (10) with a self-locking outer cone is moved by a spring (not shown) into the corresponding hole of the height adjuster (6) in the axial direction of the clamping bushing (10), whereby the inner diameter of the clamping bushing (10) is reduced accordingly and a frictional connection is established between the side part of the carrier (1) and the height adjuster (6). The principle presented in Figure 8 is comparable with the functions described in Figures 6 and 7. The clamping bushing (10) is advantageously provided with slots in the axial direction, which allow a change in the inner diameter of the clamping bushing (10) according to the displacement of the clamping bushing (8) in the corresponding cone of the height adjuster (6) with less spring force.

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Details of the invention will be described below using some embodiments.

Show it:

Fig. 1 Height-adjustable chair with footrest, seat, play surface and backrest.

Fig. 2 Height adjustable chair with footrest, seat and backrest.

Fig. 3 Height adjustable chair with seat and backrest.

Fig. 4 Height adjustable standing chair with seat.

Fig. 5 Height adjustable chair with footrest and seat.

Fig. 6 Schematic representation of a height adjuster with wedge clamp.

Fig. 7 Schematic representation of a height adjuster with clamping eccentric.

Fig. 8 Schematic representation of a height adjuster with clamping bush.

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Reference marking

1 carrier

2 Backrest

3 Game board

4 Seat

5 Footrest

6 height adjusters

7 Clamping roller

8 Adjustment spring

9 clamping eccentric

10 clamping bush

Claims (17)

1. Continuously height-adjustable, universally adaptable chair with a support ( 1 ), the lower ends of which are connected at the ends in supports and upward lateral stands which are designed for attaching a footrest ( 5 ), a seat ( 4 ), a play surface ( 3 ), a backrest ( 2 ) and/or further components individually or in various combinations, which are designed to be continuously height-adjustable independently of one another, characterized in that the continuously height-adjustable, universally adaptable chair consists of a support ( 1 ) and one or more components ( 2 ; 3 ; 4 ; 5 ) which are individually connected to one or the two lateral stands of the support ( 1 ) so that they can be moved and secured in the axial direction of the respectively assigned stand. 2. Continuously height-adjustable, universally adaptable chair according to claim 1, characterized in that the carrier ( 1 ) is designed at its lower end to form a support with an angle of less than 90 degrees to the respective adjoining upwardly directed lateral supports. 3. Continuously height-adjustable, universally adaptable chair according to claim 2, characterized in that the lower ends of the support ( 1 ) are positively connected to one another. 4. Continuously height-adjustable, universally adaptable chair according to claims 2 and 3, characterized in that, in order to improve stability, the connection of the lower ends of the support ( 1 ) is designed with a greater length than the distance between the two lateral upwardly directed supports. 5. Continuously height-adjustable, universally adaptable chair according to claims 2 to 4, characterized in that, in order to improve stability, the angle between the upwardly directed supports and the lower ends of the support ( 1 ) is designed with an angle of less than 90 degrees. 6. Continuously height-adjustable, universally adaptable chair according to claim 1, characterized in that the two upwardly directed supports of the support ( 1 ) are arranged parallel to each other. 7. Continuously height-adjustable, universally adaptable chair according to claims 1 to 6, characterized in that the height adjusters ( 6 ) are arranged so as to be displaceable and fixable on the upwardly directed stand of the carrier ( 1 ). 8. Continuously height-adjustable, universally adaptable chair according to claim 7, characterized in that each of the individual components (2; 3; 4; and 5) is fitted with one or two height adjusters ( 6 ) in a form-fitting manner. 9. Continuously height-adjustable, universally adaptable chair according to claims 7 to 8, characterized in that components (2; 3; 4; and 5) are arranged individually with one or two height adjusters ( 6 ) so as to be displaceable and fixable on one or both stands. 10. Continuously height-adjustable, universally adaptable chair according to claims 1 to 9, characterized in that the carrier ( 1 ) can be equipped with the components (2; 3; 4; and 5) and further components individually and in different combinations. 11. Continuously height-adjustable, universally adaptable chair according to claims 1 to 10, characterized in that the components (2; 3; 4; and 5) and further components are arranged on the upwardly directed stands so that they can be displaced individually relative to one another. 12. Continuously height-adjustable, universally adaptable chair according to claim 1, characterized in that the height adjuster ( 6 ) forms an automatically acting frictional or positive-locking detachable connection with the respectively associated stand of the carrier ( 1 ). 13. Continuously height-adjustable, universally adaptable chair according to claim 12, characterized in that the frictional or positive connection between the stand and the height adjustment ( 6 ) can be released manually. 14. Continuously height-adjustable, universally adaptable chair according to claims 12 to 13, characterized in that when the frictional or positive connection is released, the height adjuster ( 6 ) on the stand can be moved in the axial direction of the stand, on the stand. 15. Continuously height-adjustable, universally adaptable chair according to claims 12 to 14, characterized in that the frictional or positive connection between the stand and the height adjustment ( 6 ) acts automatically. 16. Continuously height-adjustable, universally adaptable chair according to claims 12 to 15, characterized in that the friction force between the height adjuster ( 6 ) and the associated stand is greater than the usage load acting on the height adjuster ( 6 ). 17. Continuously height-adjustable, universally adaptable chair according to claims 12 to 16, characterized in that the frictional or positive connection cannot be opened unintentionally.