CN101288533A - seat return device - Google Patents

Abstract

The present invention relates to a return device for a seat, in particular a return device for a bar stool, comprising a main cylindrical middle part as a component supporting a seat part, a base part in the middle part supporting tilt and rebound by a return device, wherein the base part comprises a fixed shaft, a hinge point between the base part and the middle part is located at the upper end of the shaft and close to the seat part to limit the range of the pendulum movement of the seat part, and an elastic material is provided between the shaft and the upper end part, and the elastic material is not only arranged between the side walls but also between the front walls. Thereby, the swing amplitude will not be too large, so that a safe and stable sitting can be achieved.

Description

seat return device

technical field

The present invention relates to a return device for a seat, and in particular to a return device for a bar stool.

Background technique

Bar stools are generally known as seating. However, its disadvantage is that people sit on it and can hardly turn it. People who sit for a long time at night will tire the muscles of the back, resulting in poor sitting posture. Most people who sit in an office all day are also the main cause of the deterioration of back muscle strength. These people, especially those with weakened back muscles, who also spend the night sitting on bar stools that are still, often develop poor posture and, as a result, back pain. A sitting posture that continuously and systematically increases the load on the intervertebral discs will cause poor blood circulation, and the consequences may cause permanent back damage. Another unfavorable factor is that the legs sitting on a bar high stool are suspended in the air and tilted downward, so most sitters will tend to form an arched back. If this sitting position is perceived as uncomfortable, bar patrons will prop themselves up on the bar of the bar stool, which again causes excessive load on one side of the intervertebral disc.

WO-A-96 24 273 shows a return device for a seat, in particular for a bar stool, comprising a main cylindrical middle part, which is the part supporting the seat part, the base of which is borrowed Tilting and rebound are supported by return means, wherein the base part and the middle part are directly connected by a sleeve formed of elastic material, and the sleeve is arranged not only between the side walls but also between the front walls.

Due to the fact that the middle part remains tilted and rebounds directly on the base, the seated person can rock back and forth slightly again and again. Therefore, the back muscles are also kept moving slightly all the time, and the intervertebral discs are always supplied with blood.

A stretchy middle section will cause the bar stool to oscillate even with minimal movement of its longitudinal axis, so the back muscles will move over and over again and the swing will be too large for an unskilled person to sit safely for long periods of time on it. In addition, the intervertebral disc does not experience any static loads.

Contents of the invention

The main purpose of the present invention is to provide a return device for a seat in order to further improve the defects in the prior art.

To achieve the above-mentioned purpose, the present invention takes the following technical solutions:

A return device for a seat, in particular a return device for a bar stool, comprising a main cylindrical middle part which is the part supporting the seat part, the base part of the middle part supported by the return device for tilting and rebounding, The base part includes a fixed shaft, the hinge point between the base part and the middle part is located at the upper end of the shaft and close to the seat part to limit the range of pendulum movement of the seat part, and an elastic material is provided between the shaft and the upper part , the elastic material is arranged not only between the side walls but also between the front walls.

The above return means provides a rubber metal swing connector between the middle part and the base part.

The resilience of the above-mentioned return device is adjustable.

The above-mentioned middle part is mounted on the return device via a splined connection.

The tubular upper portion of the body of the return means, the upper end for the spline coupling and the base portion, is secured to the arms of the base portion.

The above-mentioned shaft is mounted on the bottom part, the bottom side of the shaft includes the inside of the bottom part and the upper part of the shaft, and a cup-like object surrounds the upper end part of the shaft.

The upper part, the shaft and the bottom part are all connected with the screw rod, and the initial stress of the return device is adjusted by the cooperative operation of the nut and the screw rod.

An elastic component is additionally arranged between the head end of the screw rod and the upper end part.

The end of the return device is provided with an enhanced friction contact device to allow it to contact the floor.

Thereby, the present invention includes a fixed shaft through the base part, and a hinge point between the base part and the middle part, the hinge point is located at the upper end of the fixed shaft, and the fixed shaft ensures that the hinge part will not be too far away from the seat surface, Therefore, the motion of the pendulum is limited to an effective range.

In addition, it is useful to place a foot ring on the axis at a predetermined distance from the floor. The foot ring is locked to the shaft, so it is actually fixed. Therefore, the person who sits can put his feet on the foot rings, and despite the swing of his buttocks and upper body, because the feet have been placed on the foot rings, he can sit safely and steadily. The foot ring has the advantage of vertical adjustment on the axis, and the sitter can adjust it according to his best configuration.

A preferred embodiment of a variant has provision for the springback of the middle part, comprising a central strut and a spring structure linked in series to the rheological force of the load seat.

To make the series connection of these two parts possible, the design of the central strut needs to be able to adjust vertically without installing springs to weaken the function of the longitudinal axis.

This is the advantage of the embodiment of the variant structure. Another advantage is that the central support and the spring structure are arranged coaxially, and a guide bearing is formed between the central support and the spring structure. The coaxial arrangement of the central pillar and the spring structure makes it possible to connect the central pillar and the spring structure in series in a relatively compact arrangement. This is very important because - as mentioned above - the tilt point is not too far from the seat surface, so simply having the central pillar and spring structure aligned next to each other will result in the tilt point being positioned too far from the base portion.

The spring structure is advantageous in that it has dynamic and static spring mounts, which are embedded between the springs. This relatively simple construction makes it possible to use a suitable standard spring.

The central support is advantageously designed as an adjustable distance spring support, such as, for example, a gas spring, at least one vertical guide rail cooperating with guide bearings.

Pilot bearings advantageously consist of a vertically spaced split plain bearing, with balls or rollers being the preferred components for the bearing.

In a particularly preferred embodiment, the bearing assembly is pressed against the guide rail by a compression spring. When the bearing assembly is not spring-loaded, the inaccuracies produced during this swinging and oscillating action are very noticeable and can have a very disruptive effect on active dynamic sitting.

It is advantageous to mount at least two bearing assemblies per bearing on the rail.

The advantage of the bearing assembly in this case is the device that can fix the bearing assembly, the device of the bearing assembly presses the bearing assembly onto the guide rail; or via a compressed spring; or via an elastic deformation zone or via an elastic protrusion. Compression springs or elastically deformable areas or protrusions compress the bearing assembly radially towards the center.

The guide rail is advantageous in that it is designed as a tube whose front end is connected to the rear end of the spring strut and whose rear end is connected to the dynamic end of the spring mount.

Furthermore, it is advantageous to arrange a plain bearing bush, preferably designed as a gas-filled spring, between the guide tube and the spring strut. The continuous oscillating oscillations of the longitudinal axis with respect to the middle part during a dynamic movement, mainly due to the spring structure being a gas-filled spring with a very low degree of rebound, are the result of the sliding bearing bushes being mainly used during vertical adjustment.

The guide bearings are optimally placed on the body of the support foot, where the bearing fittings are spring loaded and displace radially. With respect to the longitudinal axis of the midsection, its dimensional errors are compensated for by a spring-loaded bearing assembly to produce consistent, trouble-free and virtually silent vibration.

The main body of the support foot is preferably mounted on the shaft of the base portion via a splined connection.

It is advantageous to have an adjustable spacing between the dynamic and static spring mounts. For this purpose, a rotatable union nut becomes the means for supporting the spring on the main body of the support foot and is used for pretensioning the spring. The pre-tension of the spring allows the swing-type ottoman to be adjusted according to the weight of the human body. As a result, when someone sits on it, the seat surface does not sink, and you can stay away or feel only a little unpleasant. A mechanism for pretensioning on the foot body via a rotatable union is advantageous, via which nut, and by turning the nut, the spring can be pretensioned or relaxed.

The advantage of the return device is the design of a rubber metal swing connector between the middle part and the base part. And the resilience can be adjusted through a hand wheel.

Description of drawings

Fig. 1 shows the side view of the swing type ottoman and its half-section view;

Figure 2 shows a sectional view of the end of the middle part of Figure 1, which is an enlarged view;

Figure 3 shows the area with guide bearings in the middle part;

Figure 4a shows a cross-section through the guide bearing area of the middle part;

Figure 4b shows a more detailed enlarged view of Figure 4a;

Figure 4c shows a view of a different embodiment of Figure 4b;

Figure 5 shows an oblique view of the shaft and the foot ring;

Figure 6 shows a cross-section of a variant shaft.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

FIG. 1 shows a side view of a rocking ottoman and its half-section, comprising a seat part 1 , a middle part 3 and a base part 2 . The middle part 3 has a central strut 4 and a spring structure 5, and supports the end of the base part 2 which tilts and springs back. The central support 4 is designed as a vertically adjustable spring support 10, usually a gas spring. The seat part 1 is connected to the fixed spring strut 10 via a plug-type joint 22 and the longitudinal axis of this spring strut is rotated by means of a bearing 23 at the end of the spring strut 10 . In order to adjust the vertical position of the seat surface 1, a control lever 24 is arranged on the underside, which, when actuated, acts in this way on the spring strut, which can then be adjusted vertically in a known manner. In addition, the central support 4 further includes a vertical guide rail 11 , which is designed to be tubular and surrounds the spring support 10 , and is rotatably connected to the end of the spring support 10 via a bearing 23 .

In order to meet the requirement of moving and dynamic sitting behavior, the spring structure 5 needs to smoothly connect the rheological force of the central pillar 4 in series.

In a reverse device, the generation of rheological force may also pass through the spring structure first, and then pass through the central support.

The spring structure 5 includes a static spring mount 8 , a spring 9 and a dynamic spring mount 7 . The dynamic spring mount 7 is connected and fixed on the upper end of the guide rail 11 . For the relative movement of the central column 4 and the spring structure 5 , a guide bearing 6 is formed between the spring structure 5 and the guide rail 11 . An imitated specific embodiment illustrates that the guide bearing 6 includes two bearings 12, which are fixed at the upper end of the main body 15 of the supporting foot. The support leg main body 15 is formed at the bottom end of the central pillar 4 and is bridged over the structure of the base portion 2 via a spline connection 16 . In the region of this bottom end, the supporting foot body 15 has an external thread which is screwed onto the union nut 17 and at the same time serves as a support for the spring 9 . The union nut 17 pretensions the spring 9 so that the seat surface 1 settles a distance when the seat bears the weight to be matched to the occupant.

The base part 2 in the middle part 3 is supported by the return device 21 for tilting and rebounding, wherein the base part 2 includes a fixed shaft 40, and the hinge point between the base part 2 and the middle part 3 is located at the upper end of the shaft 40 and is close to the seat part 1 to limit the range of pendulum movement of the seat part 1; the middle part 3 is mounted on the return device 21 of the base part 2 via a spline connection 16. The return means 21 is designed as a rubber-to-metal swing connector comprising a main tubular upper part 25 with a splined coupling 16 at the upper end and a bottom part 27 fixed to the arms 31 of the base part. The shaft 40 is mounted on the bottom part 27, the bottom side of the shaft 40 including the inside of the bottom part 27 and the upper end part 25 like a cup surrounding its upper side. An elastic material 26 is provided between the upper side of the shaft 40 and the upper end portion 25 . The elastic material is arranged not only in the front area but also between the side walls. The upper part 25 , the shaft 40 and the bottom part 27 are connected to each other via a screw 29 , wherein the pretension of the return device 21 is adjusted through the cooperative operation of the nut 28 and the screw 29 , so its resilience can be adjusted. FIG. 1 shows an illustration of a variant embodiment. Between the head end of the screw 29 and the upper end portion 25, an elastic element 30 is additionally arranged. This elastic element makes the working behavior of the return device 21 appear in a more relaxed and unobstructed manner.

A guide ring 50 is fixed on the outside of the cylinder of the shaft 40 via a collar 52 . The collar 52 has a threaded hole and is connected with an adjusting screw 53 to lock the shaft 40 through the foot ring 50 . Loosen the adjustment screw 53, the foot ring 50 can be adjusted vertically in the area of the shaft 40.

The base part 2 is generally designed in a nearly dead-loop configuration, ie the return means 21 , whereby the middle part and the seat part are fixed in a central position via the arms 31 . When the seat is loaded, the arm 31 is elastically deformed, so the swing-type ottoman is pushed close to the ground by the enhanced friction contact device 33 at the end of the return device 21 .

The rollers or balls 34 arranged in the ring-shaped base part 2 of the swing-type ottoman cause the base part 2 to deflect when the seat is loaded. According to DIN standard it is also possible to use "rollers or balls" to lock the pop-up position, the rocker ottoman allows displacement when the seat is lightly loaded, the base part 2 deflects when fully loaded .

FIG. 2 shows the end portion of the middle part 3 and FIG. 1 shows an enlarged view of the swing-type ottoman return device 21 . Foot ring 50 is not illustrated in this illustration. The present case concerns the relative movement between the guide rail 11 and the spring structure 5 during the active dynamic oscillation of the longitudinal axis of the middle part 3 . This relative movement may be caused by the above-mentioned guide bearing 6 between the guide rail 11 and the spring structure 5 . The following illustration will explain this guide bearing 6 more fully. In the spring-ejected state, the path of the spring 9 is limited by the stop 35 at the end of the vertical rail 11 . This stop device 35 is displaced on the supporting foot body 15 . In order to design the means of path limitation so that it goes up silently, a rubber ring 36 is attached between the body 15 of the supporting foot and the stop 35 . In order to limit its sliding down, an elastic stopper 32 is provided above the head end of the screw rod 29 .

Figure 3 shows a cutaway view of the middle part in which the guide bearing 6 is installed. In a description following a specific embodiment, the guide bearing 6 comprises two bearings 12 located on the support foot body 15 and cooperating with the guide rail 11. On each side of the bearing 12, there are four bearing assemblies 13 distributed around the guide rail 11, and these bearing assemblies 13 may be designed as rollers or balls. (See also Figure 4a). In a description following a specific embodiment, the bearing assembly 13 is designed as a roller, and the roller shaft contains fittings 18 of the bearing assembly at both ends. The fittings 18 of these bearing assemblies are radially displaced to a certain extent against the main body 15 of the support foot, thus spring-loading the direction of the guide rail 11 . The specific embodiment of the compression spring of the two variants is illustrated. The specific embodiment of the first variant is that the fitting 18 of the bearing assembly is supported by the compression spring 19 on the tube 37, and surrounds the support foot body 15, thereby squeezing The pressure bearing assembly 13 faces in the direction of the guide rail 11 . The tube 37 is inserted from above the upper tubular region of the foot body 15 and cooperates with the foot body 15 to fix the bearing arrangement 12 .

In a second imitated embodiment, each fitting 18 of the bearing unit has an elastic protrusion 20 , by means of which elastic deformation presses the fitting 18 of the bearing unit likewise, so that the bearing unit 13 is close to the guide rail 11 .

Figure 4a shows a sectional view through the bearing assembly 12, already depicted in Figure 3, and Figure 4b shows an enlarged detailed view of Figure 4a, the specific embodiments of these variants illustrate the compression spring of the bearing assembly 13 via the compression spring 19, and Supported on tube 37.

Fig. 4c reproduces the same details as Fig. 4b, but as a specific example of a different variant. In FIG. 4 c , the fitting 18 of the bearing assembly has a resilient protrusion 20 which is likewise supported on the tube 37 , thus pressing the bearing assembly 13 close to the guide rail 11 .

FIG. 5 shows a perspective view of a foot ring 50 erected on the shaft 40 . The shaft 40 is mainly of cylindrical design and has an offset 41 at its end. The end of the shaft 40 is mounted on the bottom part 37 in a precise fit, so that the surface of the cylinder is perfectly smooth. At its upper end (not shown in the illustration), the shaft 40 has a cup-like design for holding the elastic material 26 and the upper end portion 25 .

At the central position, the shaft 40 has a channel 42 for receiving the screw rod 29 for pretension and adjustment of the return device 21 .

The shaft 40 is usually designed as an aluminum die-cast part to additionally provide the possibility of stiffening ribs 43 between the outer wall and the channel 40 .

The foot ring 50 is erected around the outside of the shaft 40 via a collar 52 , and then locked on the shaft via an adjusting screw 53 . Foot ring 50 is connected via bracket 51 to collar 52, typically about 500 cm in diameter.

Fig. 6 further shows a specific embodiment of a variant structure of the shaft 40, which is manufactured from a solid material, such as a cast aluminum part. The shaft likewise has a channel 42 and an offset 41 for receiving the screw 29 . The shaft can be made in various lengths. From the argument that it can be quickly inserted into the bottom part 27, it will be very easy to match the height of the bar stool with the length of the shaft according to the needs of the user. Adjust the length of the screw 29 to the shaft, all this has been done.

The above is only a preferred embodiment of the structure of the present invention, and does not limit the technical scope of the present invention in any way, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are still valid. It belongs to the scope of the technical solutions of the present invention.

Claims (9)

1. the return mechanism of a seat, especially the return mechanism of barstool, it is characterized in that: comprising a main cylindrical mid portion (3) is the part (1) of supporting chair part, base portion (2) in mid portion (3) supports and resilience by return mechanism (21), wherein base portion (2) comprises a fixed axis (40), hinge point is positioned at axle (40) upper end and close seat part (1) between base portion (2) and mid portion (3), scope with (1) pendular movement of restriction seat part, provide the flexible material of a tool (26) between axle (40) and upper part (25), this elastomeric material (26) not only is placed between the sidewall but also is placed between the antetheca.

2. according to the return mechanism of the described seat of claim 1, it is characterized in that: return mechanism (21) provides rubber-metal swing connector between mid portion (3) and base portion (2).

3. according to the return mechanism of the described seat of claim 1, it is characterized in that: the screen resilience of return mechanism (21) is adjustable.

4. according to the return mechanism of any one described seat in the claim 1 to 3, it is characterized in that: mid portion (3) is to link (16) via spline to be set up on the return mechanism (21).

5. according to the return mechanism of the described seat of claim 4, it is characterized in that: the upper part (25) of return mechanism (21) main body tubulose, this upper end connects (16) for spline and base portion (27) is used, and is fixed on the support arm (31) of base portion (2).

6. according to the return mechanism of the described seat of claim 5, it is characterized in that: axle (40) is erected on the base section (27), the bottom side of axle (40) comprises the inside of base section (27) and the top of axle (40), and a similar cup is around axle (40) upper part (25).

7. according to the return mechanism of the described seat of claim 6, it is characterized in that: upper part (25), axle (40) and base section (27) all link mutually with screw rod (29), and the effect of return mechanism (21) primary stress is by adjusting the co-operating of nut (28) with screw rod (29).

8. according to the return mechanism of the described seat of claim 7, it is characterized in that: between screw rod (29) head end and upper part (25), additional configuration one elastic parts (30).

9. according to the return mechanism of the described seat of claim 1, it is characterized in that: the end of return mechanism (21), provide one to strengthen CONTACT WITH FRICTION device (33), make it can touch the floor.

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