EP3167766B1 - Suspension spring for a seat or bed support and support having at least one such suspension spring - Google Patents

Description

The invention relates to a spring strip for a seat or Liegemöbelunterfederung comprising at least two superimposed in the compression direction single spring strips, wherein the at least two individual spring strips are connected at their longitudinal axial ends acting in the longitudinal direction rigidly together. Furthermore, the invention relates to a spring base with at least one such spring bar.

Mattress pads serve to support a mattress and to increase lying comfort, compared to lying on a mattress without such spring support. Matratzenunterfederungen are known in different configurations. Matratzenunterfederungen that adapt in a special way to the lying position of a lying on the mattress top person have a variety of individual and independently responsive spring elements. Lower cost mattress supports have a frame formed of two longitudinal beams and the longitudinal beams end connecting crossbars, which carries a plurality of the longitudinal bars connecting spring strips. The transverse to the longitudinal extent extending spring strips such mattress suspension are yielding. The ends of the spring strips are usually connected with the interposition of executed by type of caps Kunststoffanschlusstücken to the longitudinal bars. Such a mattress suspension is also addressed as a slatted frame. With such a mattress suspension, the deflection of the spring strips in the middle of their span is naturally greatest. If a person lies on a mattress located on the mattress suspension, a certain couch usually forms as a result of the deflection. However, in such Matratzenunterfederungen the lying comfort is sometimes regarded as not always optimal, since the weight of the person lying on the mattress is responsible for a compression of the spring strips to form a not only caused by impressions of the mattress Liegekuhle. In this respect, it may be undesirable for a dormouse that forms a relatively wide couch, or for a side sleeper that forms a recumbent only insufficient in the shoulder area due to the lower weight acting on the mattress suspension weight.

Although it forms within the mattress by compression of the same already a certain Liegekuhle, but it is desired that the Matratzenunterfederung join the compression process at least partially. If the mattress suspension is not at least partially involved in the formation of a couch, a provision of the mattress can only be done by the elastic properties of the mattress itself. This leads to many mattresses that over time and typically consistent or only slightly changed reclining positions in the mattress forms a permanent Kuhle, which can then be perceived as uncomfortable in certain sleeping positions.

The spring strips of such a mattress suspension are in many cases those made of wood. Are used at this point, other materials, such as fiber-reinforced plastics or the like. Due to the thickness and / or the width of the spring strips the jounce characteristic of the same is specified. Also known are female connectors, which consist of two individual spring strips, of which only the upper spring bar is connected at their ends to a spar of Matratzenunterfederung. The lower spring bar is connected over the longitudinal extension of the slats sliding slide to the upper spring bar. Are these Einfederhärteeinstellschieber in the central position of these two spring strips, the entire compression work is taken over by the upper spring bar. The farther the sliders comprising these two slats have been moved towards the ends thereof, the more the lower spring slat is involved in the compression work. The result is that the farther these slides are moved away from the center, the compression characteristic of such a spring bar is harder. By this arrangement, the above-described concept is not changed in connection with the formation of a couch.

If an improvement is desired in the stabilization of the sleeping position, it must be on additional mechanical spring elements and / or on different acting devices or devices are used.

DE 298 17 431 U1 discloses a spring bar for a slatted frame. This known spring bar consists of two superimposed Einzelelfederleisten. The upper single spring bar is curved against the compression direction, over its span. The lower single spring bar is formed in the opposite direction to the upper single spring bar. In the area of its center, the lower single spring bar has a curvature, which is executed in the direction of the upper single spring bar. The ends of the two individual spring strips are brought together and rigidly connected to each other, for example, glued together.

EP 0 397 978 A1 discloses a spring bar for a slatted frame. This known spring bar is in one piece. In the subject of this document, the spring bar is made of several glued together and pressed veneer wood layers and an arranged between the veneer wood layers and glued with these elastic layer. The elastic layer thins out toward the longitudinal axial ends of the veneer layers, so that they are glued together in the two end regions without the interposition of the elastic layer.

EP 2 105 068 A1 describes a spring bar made of plastic or plastic mixture. This known spring bar is curved against the compression direction over its span across. On the underside of the spring bar, a longitudinal web is connected, which is supported at the ends and by means of intermediate webs on the underside of the spring bar. The longitudinal bar runs straight and does not extend to the end of the actual spring bar.

Starting from the above-discussed prior art, the invention is therefore based on the object to propose a spring bar through which, without requiring additional elements, a sleeping position, in particular a side sleep position by forming a correspondingly limited to the lying area Liegekuhle is stabilized.

This object is achieved according to the invention by an aforementioned generic spring bar, wherein the spring bar in the unloaded Condition against the compression direction is curved over its span, the curvature evenly over the span thereof extends and the at least two individual spring strips are connected at their longitudinal axial ends at a distance from each other.

In this spring bar, the convex curvature of the same is used in the unloaded state in a clever manner. The spring strip comprises at least two single spring strips, which are arranged in the compression direction at a distance from each other. In the area of their ends, the single spring strips are rigidly connected. This rigid connection acts between the single spring strips at least in the longitudinal extension of the same. Is achieved by this connection that the single spring strips at a deflection of the spring bar can not move in longitudinal axial extension against each other. Because of the convex curvature of the single spring strips in the unloaded state, an individual spring strip located above each strives towards the underlying single spring strip to execute a compensating movement in longitudinal extension relative to the single spring strip located thereunder as a result of shortening by spring deflection. Such a compensating movement is prevented in this spring bar, however, due to the force acting in the longitudinal extent of the single spring strips rigid connection in the ends. The forcibly self-adjusting movement then leads to buckling or buckling of the upper single spring bar. Such a bulge is dependent on the compression work done and also on the position at which the compression takes place with respect to the longitudinal extension of the spring bar. In any case, at least one such bulge forms between the end portion of the spring bar and the position of the deflection. A sleeping position on such a slats comprehensive spring base is formed either on both sides to the position of the person lying on it by a respective bulge or only on one side by a bulge and on the other side by the completion of the lower spring. Therefore, a lying on such a spring bar recumbent couch has, as a rule, a smaller span than this would form in conventional spring strips. For this reason, when using this spring strips in a mattress suspension a sleeping position is much better fixed than when using conventional spring strips. Especially positive makes this effect when, when using such spring strips in a Matratzenunterfederung a person has taken a side sleeping position outside the middle of the mattress. In such eccentric loading of the spring bar, based on its longitudinal extension, the top single spring strut endeavors to perform a directed in the longitudinal direction of the same compensating movement relative to the or below the single spring strips only in that section that is not burdened by the person. The bulge forming in the uppermost single spring strip is then particularly concise. This is also desirable for a side-sleep position, since a side-sleep position is inherently more unstable than a back-sleep position and therefore stabilization can be provided only via a correspondingly-deep reclining couch, provided that this is as is the case with the subject spring-bar of the present invention. adapted to the contour of the body.

With the above-described concept of the formation of a spring bar, the couch is adjusted by forming the one or both of the above-described protrusions to a particular extent to the contour of a person lying on the mattress when using the same in a mattress suspension. The consequence is that a so-called "roll-out effect" has been encountered. Of particular advantage of the spring bar concept described is also that this can be produced not only without additional elements or devices but also cost. In addition, a mounting of such a spring bar over conventional spring strips is not difficult. An assembly is carried out in the same way by inserting the opposite ends anchored in grooves in the spar or in corresponding connection caps, which are connected to the spars of a Unterfederungsrahmens.

The spacing of the individual spring strips can be the same across their span. There is also the possibility that the distance between the uppermost single spring strip and the single spring strip located below it in the compression direction increases from the regions of the end connections in the direction of the center. The result is that then the top single spring bar has a greater curvature relative to the underlying. The associated greater length of the upper single spring bar results in a deflection process for the formation amount greater compensating movement result, which in turn leads to a stronger bulge. As a result, a sleeping position is much better fixed than reclining, which can be formed by using conventional spring strips.

The jounce comfort in such a spring bar can be set up by the number and the design of the individual spring strips involved in such a spring bar. Depending on the desired configuration, the single spring strips of such a spring strip can be made of the same or a different material. Likewise, the individual spring strips may be formed differently in terms of their dimensioning with respect to their material thickness and / or width.

For spacing the individual spring strips in the region of their end connections, spacers which are inserted between the adjacent end sections of adjacent individual spring strips are used according to an embodiment.

The above-described rigid connection can be achieved, for example, by an adhesive connection of the parts involved in the creation of the rigid end connection. Instead of or in addition, an end connection thorough fastener and / or these enclosing sleeves can be used, as well as mechanically made by cutting of solid wood or one-piece plywood, as long as it is ensured that the individual spring strips in the longitudinal extension thereof do not move in the region of their ends against each other can.

In a further development of such a spring strip is provided that between the connections, a further connection point is provided, in which the single spring strips held at a distance from each other and acting in the longitudinal direction are rigidly connected together. Such spring strips are also suitable for dividing the lying area, if this is intended for two people. Such an additional connection point can also be useful within a lying surface area for a person, for example to achieve a special Buckling characteristic in the pelvic / hip area of a mattress suspension. It is understood that in case of slats with a larger span more than one additional connection point can be provided.

Overall, such a spring bar is slightly harder than one without additional, typically central additional connection point. Also, one can choose such a configuration, if the one or both should be formed less strong as a result of deflection forming bulges, compared with a previously described spring bar without the other, typically central, connection point.

The above-described spring strips are basically suitable for implementation in any spring suspension, be it for a sitting or a reclining furniture. However, such spring strips are particularly suitable in connection with an insert in a Matratzenunterfederung (slatted frame). In such a case, it is particularly useful to provide these slats due to their special contour adjustment for the shoulder and / or pelvic area.

Fig. 1:

eine schematisierte Draufsicht auf eine Matratzenunterfederung mit Federleisten gemäß der Erfindung im Becken- und Schulterbereich,

Fig. 2:

einen Schnitt durch die Unterfederung der Figur 1 mit Blick auf eine Federleiste gemäß der Erfindung im unbelasteten Zustand,

Fig. 3:

eine Ausschnittsvergrößerung aus dem seitlichen Endbereich der Federleiste der Figur 2,

Fig. 4:

die Federleiste der Figur 2 bei einer einfedernden Belastung durch eine Person in Rückenschlafposition,

Fig. 5:

die Darstellung der Figur 4 mit einer die Federleiste beanspruchenden Person in Seitenschlafposition,

Fig. 6:

ein Schnitt entsprechend demjenigen der vorangegangenen Figuren durch eine Unterfederung mit Blickrichtung auf eine Federleiste gemäß einer weiteren Ausgestaltung der Erfindung mit einer die Matratzenunterfederung nutzenden Person in Seitenschlafposition,

Fig. 7:

eine Schnittdarstellung entsprechend derjenigen der vorangegangenen Figuren mit Blick auf eine Federleiste gemäß noch einer weiteren Ausgestaltung der Erfindung und unter Belastung durch eine Person in Rückenschlafposition,

Fig. 8:

die Federleiste der Figur 7 mit einer Belastung dieser Federleiste bei einer außermittigen Seitenschlafposition durch eine die Unterfederung nutzende Person und

Fig. 9:

die Darstellung der Figur 8 mit der darauf in Seitenschlafposition befindlichen Person in einer mittigen Anordnung bezüglich der Längserstreckung der Federleiste.

The invention is described below by means of embodiments with reference to the accompanying figures. Show it:

Fig. 1:

a schematic plan view of a Matratzenunterfederung with spring strips according to the invention in the pelvic and shoulder area,

Fig. 2:

a section through the lower suspension of FIG. 1 with a view to a spring strip according to the invention in the unloaded state,

3:

an enlarged detail of the lateral end portion of the spring bar the FIG. 2 .

4:

the spring bar the FIG. 2 with a compressive load by a person in the back sleep position,

Fig. 5:

the representation of FIG. 4 with a person claiming the spring strip in side sleep position,

Fig. 6:

a section corresponding to that of the preceding figures by a spring base with a view towards a spring strip according to another embodiment of the invention with a person using the Matratzenunterfederung in side sleep position,

Fig. 7:

a sectional view corresponding to those of the preceding figures with a view of a spring bar according to yet another embodiment of the invention and under stress by a person in back sleep position,

Fig. 8:

the spring bar the FIG. 7 with a load of this spring bar at an off-center side sleep position by a person using the spring action and

Fig. 9:

the representation of FIG. 8 with the person in side sleep position in a central arrangement with respect to the longitudinal extension of the spring strip.

A mattress suspension 1 comprises a frame 2, which is constructed in the illustrated embodiment of two longitudinal bars 3, 3.1 and two the longitudinal bars 3, 3.1 connecting cross bars 4, 4.1. The longitudinal bars 3, 3.1 enclose a lower suspension area. This is covered by spring strips. These are connected in a conventional manner by means of spring strip caps 5, in which engage the spring strips with their ends to the longitudinal members 3, 3.1. In the area of the pelvis and in the shoulder area, the mattress suspension 1 has several special spring strips 6, which are described below. The remaining slats are conventional slats.

In the side view of FIG. 2 is such a spring bar 6 with respect to their structure recognizable. The spring bar 6 is convexly curved in the unloaded state against the Einfederungsrichtung, with the curvature extends evenly over the span of the spring bar 6. A special feature of the spring strip 6 is that it is composed of three single spring strips 7, 7.1, 7.2. The individual spring strips 7, 7.1, 7.2 are rigidly connected to one another in the region of their ends pointing to the longitudinal bars 3, 3.1, both in the direction of their longitudinal extension and in the transverse direction thereto. The single spring strips 7, 7.1, 7.2 are spaced apart, as this in the enlarged detail of FIG. 3 can be seen more clearly. In the illustrated embodiment, the single spring strips 7, 7.1, 7.2 are those made of wood. To grant the distance between the individual spring strips 7, 7.1, 7.2 are each spacers 8, 8.1 turned on. The end connection in the region of the spacers 8, 8.1 between the individual parts 7, 8, 7.1, 8.1, 7.2 is provided in the illustrated embodiment in each case by an adhesive connection. The area of the end connection is indicated by the reference numeral 9. Towards the longitudinal axial end of the spring strip 6, this is tapered in its end portion of the end connection 9 in terms of their material thickness, so that the tapered portion 10 can be inserted into a conventional spring strip cap 5. In the embodiment shown in the figures, the taper is introduced into the pointing to the pressure load side top of the female connector 6 by a material reduction. In another embodiment, the taper of the pressure shadow side of the spring bar 6 is provided. The transition from the pressure side of the spring strip 6 in the adjacent groin cap then takes place without a groove in which the mattress base or a reference could jam during the process of compression or rebound.

A reduction in the thickness in the region of the ends of the spring strip can also be made by a shading, as this is basically known from the prior art.

How out FIG. 3 it can be seen, the material thickness of the spacers 8, 8.1 in the illustrated embodiment corresponds to those of the Einzelelfederleisten 7, 7.1, 7.2. Thus, the distance between the individual spring strips 7, 7.1, 7.2 provided by the spacers 8, 8.1 corresponds to the material thickness of such. In the illustrated embodiment, the distance of the individual spring strips 7, 7.1, 7.2 in the unloaded state, as in FIG. 2 shown, consistently provided. It is understood that the material thickness of the spacers, which determine the spacing of the individual spring strips from one another, may also be different from the material thickness of the individual spring strips and may also be provided differently from each other. Different distances lead to a different design of a couch, so that the distance of the individual spring strips is provided from each other depending on the desired training a couch.

Due to the spacing of the individual spring strips 7, 7.1, 7.2 the jounce comfort compared to conventional slats is significantly improved. Due to the spacing of the individual spring strips 7, 7.1, 7.2 a first compression of the top single spring strip 7 and then in the middle single spring strip 7.1 already at a lower force.

FIG. 4 shows the behavior of the spring strip 6 at a central load by a person in back sleep position. Not shown in FIG. 4 and also the other figures a mattress located on the mattress suspension 1 mattress. Due to the central load of the spring bar 6 forms a couch 11 at its center. Due to the above-described embodiment of the spring bar 6, the couch is limited to the actual width of the body parts, which act on the spring bar 6. The forming Liegekuhle 11 thus does not extend from the engaging in the spring strip caps ends to the middle, but as a result of the above-described concept of spacing the Einzelfederleisten 7, 7.1, 7.2 from each other, but is limited to the or those sections, in contrast to prior art which are specifically claimed by the use of the person on the mattress spring 1. Reason for this in relation to prior art slats in terms of their width closer fitting of Liegekuhle 8 to a body is that the ends of the Einzelelfederleisten 7, 7.1, 7.2 in the longitudinal extension thereof are rigidly connected together and thus compensating movements during compression of the top single spring bar 7 with respect to the underneath located, not take place by a shift relative to the underlying individual spring strip 7.1 can. Rather, the uppermost single spring strip 7 is arched up adjacent to the location of the load. This is also in the FIG. 4 shown back sleepers position of the case, even if this effect is not so clearly visible due to the relatively large width of the person on the mattress spring 1 person in this figure.

The above-described effect appears particularly clearly when the spring strip 6 is eccentrically loaded by a person in side sleep position. This is in FIG. 5 shown. The couch 11.1 is due to the bulge occurring due to the load 12 of the top single spring bar 7 closely matched to the body of the person. The couch 11.1 is found to be very pleasant for the person in side sleep position, since a particularly effective support in the back by the spring bar 6, in particular its single spring bar 7, is provided. At the same time, due to the resilience of the spring strip 6, in the direction of the longitudinal spar 3 of the mattress suspension 1, the reclining tube 11.1 is particularly well adapted to the body of the person acting on it and, in particular, sufficiently deep to be effective in this way. out "counteract.

FIG. 6 shows a further embodiment of a spring bar 6.1 according to the invention, which is basically constructed in the same way as the spring bar 6 of FIGS. 1 to 5 , In this respect, the above statements also apply to the spring bar 6.1. The spring strip 6.1 differs from the spring strip 6 only in that it comprises only two single spring strips 7.3, 7.4. In the spring strip 6.1, the upper single spring strip 7.3 has a lower material thickness than the lower single spring strip 7.4. Thus, the lower single spring bar 7.4 is mainly responsible for a weight intake, while the upper single spring bar 7.3 is mainly used to form a Liegekuhle. The single spring strips 7.3, 7.4 are also spaced from each other. FIG. 6 shows such a spring bar 6.1 in a loading situation, as described above to the spring bar 6 in the FIG. 5 is described. Likewise, as in the case of the spring strip 6, a couch 11.2, which is perceived as very comfortable, forms in the side sleep position shown.

FIGS. 7 to 9 show yet another embodiment of a spring bar 6.2 according to the invention. This is basically constructed as the spring bar 6 of FIGS. 1 to 5 and, like the spring strip 6, comprises three individual spring strips 7.5, 7.6, 7.7. Also in this spring bar 6.2, the end connections are made so that the longitudinal extension of the following movements of the Einzelelfederleisten 7.5, 7.6, 7.7 are prevented. The spring strip 6.2 differs from the spring strip 6 in that it has a further connection point 13 in the region of its center, in which the single spring strips 7.5, 7.6, 7.7 are rigidly connected while maintaining their distance, in order to longitudinal axis compensation movements of the Single spring strips 7.5, 7.6, 7.7 to prevent a load in the spring strip 6.2. Between the single spring strips 7.5, 7.6, 7.7 spacers are turned on in the spring strip 6.2 as well as in the end connections.

The spring strip 6.2 acts somewhat harder than the spring bar 6. The hardness can be set across the width of the connection point 13. It is understood that the wider the joint 13, the harder is the spring strip 6.2 in its compression behavior.

FIG. 7 shows the in the unloaded state also convex upwardly curved spring bar 6.2 at a load by a person lying in the middle of the spring bar 6.2 person in back sleep position. Due to the configuration of the spring bar 6.2, a reclining couch 11.3 adapted to the body contour is formed.

In an off-center side sleep position, as in FIG. 8 shown forms as well as this to the FIG. 5 is described to the spring bar 6, a bulge 12.1 in the non-burdened by the person area of the spring bar 6.2 off. Due to the central further connection point 13 of the individual spring strips 7.5, 7.6, 7.7, the bulge 12.1 drops slightly smaller than the bulge 12 in the spring strip 6.

In a central side sleep position bulges 12.2, 12.3 form on both sides of the person (see FIG. 9 ).

The invention has been described with reference to embodiments. Without departing from the scope of the applicable claims, numerous other embodiments for a person skilled in the art will be able to realize the invention.

The described Matratzenunterfederung can be provided on the top of the spring strips with a padding and summarized with the padding and the spring strips enclosing cover. Such a configuration would in principle correspond to an embodiment, as this is known by box spring beds, wherein instead of the springs, the spring strips are provided. In such an embodiment of the spring base will be when using the same in the context of a reclining chair top mattress.

In a further embodiment, it is provided that the lower suspension is part of a total padding, that consequently the addressed in the described embodiments mattress in the case of a reclining furniture is connected to the lower suspension and thus forms the lower suspension with the mattress a unit. In a foam mattress, the spring strips can engage, for example, in the foam, so this is fixed to the spring strips. Even in such a case, the mattress is typically provided with a coating together with the lower suspension.

Claims (12)

1. Suspension spring for a seat or bed support, comprising at least two individual suspension springs (7, 7.1, 7.2; 7.3, 7.4; 7.5, 7.6, 7.7) arranged above one another in the spring effect direction, wherein the at least two individual suspension springs (7, 7.1, 7.2; 7.3, 7.4; 7.5, 7.6, 7.7) are rigidly connected to one another at their longitudinal axial ends and taking effect in the longitudinal extension, characterised in that the suspension spring (6, 6.1, 6.2) in the state when not subjected to loading is cambered against the spring effect direction over its tension width, the camber extends uniformly over the tension width, and the at least two individual suspension springs (7, 7.1, 7.2; 7.3, 7.4; 7.5, 7.6, 7.7) are connected at their longitudinal axial ends but with a spacing between them
2. Suspension spring according to claim 1, characterised in that the individual suspension springs (7, 7.1, 7.2; 7.5, 7.6, 7.7) exhibit in each case the same material thickness.
3. Suspension spring according to claim 1, characterised in that the lowermost individual suspension spring (7.4) exhibits a greater material than the uppermost individual suspension spring (7.3).
4. Suspension spring according to any one of claims 1 to 3, characterised in that, in order to ensure that the spacing is maintained between the individual suspension springs (7, 7.1, 7.2; 7.3, 7.4; 7.5, 7.6, 7.7), spacer elements (8, 8.1) are inserted into the rigid end connections (9) between the end sections.
5. Suspension spring according to any one of claims 1 to 4, characterised in that, in order to produce the rigid end connections (9), the parts that are involved in an end connection (9) are connected to one another by an adhesive bond connection.
6. Suspension spring according to any one of claims 1 to 4, characterised in that, in order to produce the rigid end connections, the parts involved in an inner connection are connected to one another by a least one securing element engaging through these parts.
7. Suspension spring according to any one of claims 1 to 6, characterised in that the suspension spring (6, 6.1, 6.2) comprises three individual suspension springs (7, 7.1, 7.2; 7.5, 7.6, 7.7).
8. Suspension spring according to any one of claims 1 to 6, characterised in that the individual suspension springs (7.5, 7.6, 7.7) are rigidly connected to one another between their ends at a further connection point (13) with a spacing between them, taking effect at least in the longitudinal direction.
9. Suspension spring according to claim 8, characterised in that the spacing interval with which the individual suspension springs (7.5, 7.6, 7.7) are connected to one another at the further connection point (13) corresponds to that spacing interval with which the individual suspension springs (7.5, 7.6, 7.7) are spaced apart from one another at their end connections.
10. Under-spring for a seat or bed, with an under-spring region laterally delimited by two spar elements and with at least one suspension spring according to any one of claims 1 to 9, connected by its ends to the spars, spanning over the under-spring region.
11. Under-spring according to claim 10, characterised in that the under-spring is a mattress under-spring, and that a plurality of suspension springs (6, 6.1, 6.2) according to any one of claims 1 to 10 are arranged in the shoulder and/or pelvic region.
12. Under-spring according to claim 10, characterised in that the under-spring is a mattress under-spring, fitted exclusively with suspension springs according to anyone of claims 1 to 10.

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