EP3400844A1 - Noyau de ressort à ressort ensaché et ressorts en mousse - Google Patents

Noyau de ressort à ressort ensaché et ressorts en mousse Download PDF

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Publication number
EP3400844A1
EP3400844A1 EP17170763.1A EP17170763A EP3400844A1 EP 3400844 A1 EP3400844 A1 EP 3400844A1 EP 17170763 A EP17170763 A EP 17170763A EP 3400844 A1 EP3400844 A1 EP 3400844A1
Authority
EP
European Patent Office
Prior art keywords
spring
spring elements
pocket
pocketed
foam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17170763.1A
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German (de)
English (en)
Inventor
Niels Albæk
Morten JØRGENSEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
L&P Swiss Holding GmbH
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L&P Swiss Holding GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by L&P Swiss Holding GmbH filed Critical L&P Swiss Holding GmbH
Priority to EP17170763.1A priority Critical patent/EP3400844A1/fr
Publication of EP3400844A1 publication Critical patent/EP3400844A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/04—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with spring inlays
    • A47C27/06—Spring inlays
    • A47C27/063—Spring inlays wrapped or otherwise protected
    • A47C27/064—Pocketed springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/04—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with spring inlays
    • A47C27/06—Spring inlays
    • A47C27/062—Spring inlays of different resiliencies
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
    • A47C27/148—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays of different resilience

Definitions

  • the invention relates to a spring core with pocketed springs, a bedding or seating product comprising a spring core with pocketed springs, and method of manufacturing a spring core with pocketed springs.
  • Spring cores are widely used in seating or bedding products. Such spring cores may be made from a matrix of multiple springs joined together directly as by helical lacing wires, or indirectly as by fabric within which each individual spring is contained. Pocket spring cores in which springs are respectively contained in a pocket of fabric are popular, due to the comfort and luxury feel provided by pocket spring cores.
  • spring cores with springs having different characteristics. For example, varying degrees of hardness may be achieved changing the gauge of the wire from which the springs are manufactured.
  • coil springs formed of a metal wire may be combined with foam material.
  • foam material may also be added to wire based coil springs to reduce noise, as for example described in US8266745B2 .
  • a pocket spring core is provided, e.g., for incorporation into a bedding product, such as a mattress, or for incorporation into a seating product, such as a sofa cushion or chair cushion.
  • the spring core comprises a plurality of first pocketed spring elements.
  • the first pocketed spring elements are each formed of a pocket and at least a coil spring enclosed in the pocket.
  • the spring core comprises a plurality of second pocketed spring elements.
  • the second pocketed spring elements are each formed of a pocket and a foam spring enclosed in the pocket. Accordingly, some pockets of the spring core each include a coil spring, while other pockets include a foam spring, but no coil spring.
  • the foam springs of the second pocketed spring elements may correspond to foam pegs or cylinders.
  • the coil springs of the first pocketed spring elements may be formed of a metal wire, e.g., steel wire.
  • the characteristics of the spring core may be efficiently varied between the different pocketed spring elements.
  • the first pocketed spring elements may be predominantly arranged in areas where a higher stability of the spring core is desired, e.g., close to the edges or in end sections of a mattress.
  • the second pocketed spring elements may be arranged in areas where a higher flexibility of the spring core is desired, e.g., in a central section where in typical usage parts of a user's body, like shoulders or pelvis, will come to rest. The increased flexibility may provide enhanced comfort for the user.
  • the coil springs of the first pocketed spring elements have a different height than the foam springs of the second pocketed spring elements.
  • the height of the coil springs could be higher than that of the foam springs.
  • the height of the foam springs could be higher than that of the coil springs.
  • the springs having the higher height determine the characteristics of the spring core upon initial compression, in a range between the higher height and the lower height. In the case of compression to beyond the lower height, both the springs having the higher height and the springs having the lower height will contribute to the characteristics of the spring core, which for example allows for achieving a stiff feeling in the case of strong compression.
  • the coil springs of the first pocketed spring elements may have different heights and/or if in an uncompressed state the foam springs of the second pocketed spring elements have different heights.
  • pocketed spring elements with coil springs or foam springs of various heights may be mixed in various patterns to tailor the characteristics of the spring core.
  • the coil springs of the first pocketed spring elements comprise first coil springs, which in an uncompressed state have the same height as at least some of the foam springs of the second pocketed spring elements, and second coil springs which in an uncompressed state have a different height than at least some of the foam springs of the second pocketed spring elements.
  • the foam springs of the second pocketed spring elements may comprise first foam springs, which in an uncompressed state have the same height as at least some of the coil springs of the first pocketed spring elements, and second foam springs which in an uncompressed state have a different height than at least some of the coil springs of the first pocketed spring elements.
  • Using coil springs and foam springs of the same height may for example help to achieve a desired height profile of the spring core.
  • the common height of the coil springs and the foam springs could be used to define a substantially planar upper surface of the spring core.
  • the pocket encloses not only the coil spring, but also a foam spring. That is to say, at least some of the first pocketed spring elements could include a hybrid coil-foam spring.
  • the foam spring could be a foam cylinder or peg which is inserted into the coil spring.
  • the coil spring and the foam spring of the first pocketed spring element may then also have different heights. Combining a coil spring and a foam spring in the same pocket may further enhance the flexibility with respect to tailoring the characteristics of the spring core.
  • the pocket spring core has multiple sections. These sections may correspond to areas where in typical usage scenarios specific parts of a user's body will come to rest.
  • the pocket spring core could have a head section which has characteristics tailored to support the user's head, a shoulder section, which has characteristics tailored to support the user's shoulders or upper body, a middle section which has characteristics tailored to support the user's lower body or pelvis, a leg section which has characteristics tailored to support the user's legs and knees, and a feet section which has characteristics tailored to support the user's feet.
  • the multiple sections of the spring core may differ with respect to a distribution of the first pocketed spring elements and the second pocketed spring elements.
  • the first pocketed spring elements are interleaved between at least some of the second pocketed spring elements, and/or at least some of the second pocketed spring elements are interleaved between at least some of the first pocketed spring elements.
  • Various interleaving patterns can be used. By interleaving the first pocketed spring elements and the second pocketed spring elements, the spring core can be provided with local characteristics which are determined by both the coil springs of the first pocketed spring elements and the foam springs of the second pocketed spring elements.
  • the spring core may at the position of these two pocketed spring elements be provided with a local characteristic which is defined by the characteristics of the coil spring of the first pocketed spring element and by the characteristics the foam spring of the second pocketed spring element.
  • the foam springs of at least some of the second pocketed spring elements are formed of memory foam. Usage of memory foam provides a further degree of freedom with respect to imparting desired characteristics to the spring core.
  • a bedding or seating product which comprises a spring core as described above.
  • the bedding or seating product may for example correspond to a bed, a mattress, a sofa, a chair, a sofa cushion, or a chair cushion.
  • a method which can be used for manufacturing a pocket spring core as described above.
  • a plurality of coil springs is provided. Each of the coil springs is enclosed in a respective pocket, thereby forming the first pocketed spring elements.
  • a plurality of foam springs is provided. Each of the foam springs is enclosed in a respective pocket to form the second pocketed spring elements. Further, the first pocketed spring elements and the second pocketed spring elements are joined, thereby forming the pocket spring core.
  • FIG. 1 shows a cushion in the form of a single-sided mattress 1 incorporating a pocket spring core 2 according to an embodiment.
  • This cushion or mattress 1 comprises the pocket spring core 2 over the top of which there is a foam pad 4 covered by a fiber pad 5.
  • This complete assembly is mounted upon a base 7 and is completely enclosed within an upholstered covering material 6. While one embodiment of the invention described herein is illustrated and described as being embodied in a single-sided mattress, it is equally applicable to double-sided mattresses or seating cushions. In the event that it is utilized in connection with a double-sided mattress, the bottom side of the spring core 2 may have a foam pad applied over the bottom side of the spring core and that pad is in turn covered by a fiber pad of cushioning material.
  • the pocket spring core 2 is manufactured from multiple strings 3 of pocket spring elements.
  • the strings 3 may respectively be formed by providing a fabric layer, inserting a spring into the fabric layer, folding the fabric layer so as to cover the spring either before or after insertion of the spring, and applying longitudinal and transverse seams, e.g. by welding.
  • Each string 3 may extend across the full width of the product 1.
  • the strings 3 may be connected in side-by-side relationship as, for example, by gluing the sides of the strings 3 together in an assembly machine, so as to create an assembly or matrix of springs having multiple rows and columns of pocketed springs bound together, such as by gluing, welding or any other conventional assembly process commonly used to create pocket spring cores.
  • the pocket spring core 2 forms a unitary structure having a width W and length L.
  • the pocket spring core 2 may be fabricated using various kinds of conventional pocket spring manufacturing machine and by any conventional spring pocketing process, which allow for not only using coil springs formed of a metal wire, but also foam springs formed of a foam material.
  • the fabric from which the pockets are formed may be semi-impermeable.
  • the fabric may be configured such that it has a greater resistance to air flow directed from an exterior to an interior of the pocket than to air flow directed from an interior to an exterior of the pocket.
  • the seams which delimit the respective pockets may be sinusoidal welded seams, e.g., formed by ultrasonic welding.
  • the spring core 2 includes at least two different types of pocketed spring elements: first pocketed spring elements with a pocket with an enclosed coil spring and second pocketed spring elements with a pocket with an enclosed foam spring, but no coil spring.
  • first pocketed spring elements could also include both a coil spring and a foam spring.
  • the coil springs may be formed of a metal wire.
  • the foam springs may be formed of various foam materials, e.g., a flexible polyurethane foam, a visco-elastic foam, a latex rubber foam, or a memory foam.
  • combing coil springs and foam springs in the same spring core enables utilizing their unique performance advantages in different points and zones to achieve optimized balance of firmness, durability and soft-touch feel, as well as enhanced air ventilation as compared to using only foam.
  • Fig. 2 illustrates an example of pocketed spring elements 21, 31 which may be used in the spring core 2.
  • each pocketed spring element 21, 31 is formed of a pocket 22, 32 and a spring 23, 33 enclosed within the pocket 22, 32.
  • the pockets 22, 32 may be formed from one or more fabric layers, typically a non-woven fabric material, such as a non-woven polypropylene based fabric.
  • the pocket 22 encloses a coil spring 23.
  • An interior portion of the coil spring 23 is hollow.
  • the pocket 32 encloses a foam spring.
  • the coil springs 23 and the foam springs 33 are compressible in a height direction H, which is perpendicular to the width and length directions of the pocket spring core 2.
  • the pocketed spring elements 21, 31 are illustrated as being part of the same string and separated by seams 40.
  • the pocketed spring elements 21 are interleaved with the pocketed spring elements 31.
  • this interleaving is based on an interleaving pattern where the pocketed spring elements 21 alternate in a one-to-one sequence with the pocketed spring elements 31.
  • other interleaving patterns could be used as well.
  • Fig. 3 shows an example of how the pocketed spring elements 21, 31 could be distributed in a plane defined by the width direction and the length direction of the spring core 2.
  • open circles denote positions of the pocketed spring elements 21 with the coil springs 23, and dotted circles denote positions of the pocketed spring elements 31 with the foam springs 33.
  • the spring core 2 includes multiple sections 11, 12, 13, 14, 15 which have different distributions of the pocketed spring elements 21, 31.
  • the section 11 is a head section which in typical usage scenarios of the mattress 1 would support the head of a user
  • the section 12 is a shoulder section which in typical usage scenarios of the mattress 1 would support the shoulders or upper body of the user
  • the section 13 is a middle section which in typical usage scenarios of the mattress 1 would support the lower body or pelvis of the user
  • the section 14 is a leg section which in typical usage scenarios of the mattress 1 would support the legs or knees of the user
  • the section 15 is a feet section which in typical usage scenarios of the mattress 1 would support the feet of the user.
  • the spring core 2 has a symmetrical configuration in which the section 11 is similar to the section 15 and the section 12 is similar to the section 15.
  • the mattress can also be used for the opposite orientation of the user, i.e., with the head at the section 15.
  • the section 11 at the same time acts a further feet section
  • the section 12 at the same time acts a further leg section
  • the section 14 acts as a further shoulder section
  • the section15 at the same time acts a further head section.
  • the sections 11, 12, 13, 14, 15 each have a different configuration.
  • the sections 11 and 15 include only the pocketed spring elements 21 with the coil springs 23. In this way, these sections can be provided with a good stability.
  • the sections 12, 13, and 14 include both the pocketed spring elements 21 with the coil springs 23 and the pocketed spring elements 31 with the foam springs 33. In this way, the sections 12, 13, and 14 may be provided with a softer and less elastic characteristic than the sections 11 and 15.
  • the relative proportion of the pocketed spring elements 31 with the foam springs 33 is higher than in the section 13. In this way, the section 13 may be provided with a stiffer an more elastic compression characteristic than the sections 12 and 14.
  • Fig. 4 illustrates a corresponding example of pocketed spring elements 21 and 31'.
  • each pocketed spring element 21, 31' is formed of a pocket 22, 32' and a spring 23, 33' enclosed within the pocket 22, 32', and the pockets 22, 32' may be formed from one or more fabric layers, typically a non-woven fabric material, such as a non-woven polypropylene based fabric.
  • the pocket 22 encloses a coil spring 23.
  • An interior portion of the coil spring 23 is hollow.
  • the pocket 32' encloses a foam spring.
  • the coil springs 23 and the foam springs 33' are compressible in a height direction H, which is perpendicular to the width and length directions of the pocket spring core 2.
  • the pocketed spring elements 21, 31' are illustrated as being part of the same string and separated by seams 40.
  • the foam springs 33' of the pocketed spring elements 31', and also the corresponding pockets 32' have a lower height than the coil springs 23 of the pocketed spring elements 21. Accordingly, when starting to compress the mattress 1 in an area which includes the pocketed spring elements 21 and 31', initially only the coil springs 23 are compressed. Only when the coil springs 23 are compressed so far that they have the same height as the foam springs 33', also the foam springs 33' will be compressed. For higher compression loads, this yields a stiffer compression characteristic of the spring core 2.
  • the pocketed spring elements 21 are interleaved with the pocketed spring elements 31'.
  • this interleaving is based on an interleaving pattern where the pocketed spring elements 21 alternate in a one-to-one sequence with the pocketed spring elements 31'.
  • other interleaving patterns could be used as well.
  • Fig. 5 shows an example of how the pocketed spring elements 21, 31' could be distributed in a plane defined by the width direction and the length direction of the spring core 2.
  • open circles denote positions of the pocketed spring elements 21 with the higher coil springs 23, and dotted circles denote positions of the pocketed spring elements 31' with the lower foam springs 33'.
  • the upper ends of the pocketed spring elements 21 with the higher coil springs 23 define a substantially planar upper surface of spring core 2.
  • the spring core 2 includes multiple sections 11, 12, 13, 14, 15, which have different distributions of the pocketed spring elements 21, 31', e.g., corresponding to head section, shoulder section, middle section, leg section, and feet section, respectively.
  • the spring core 2 has a symmetrical configuration in which the section 11 is similar to the section 15 and the section 12 is similar to the section 15.
  • the sections 11, 12, 13, 14, 15 each have a different configuration.
  • the sections 11 and 15 include only the pocketed spring elements 21 with the higher coil springs 23. In this way, these sections can be provided with a good stability.
  • the sections 12, 13, and 14 include both the pocketed spring elements 21 with the higher coil springs 23 and the pocketed spring elements 31' with the lower foam springs 33'. In this way, the sections 12, 13, and 14 may be provided with a softer and less elastic compression characteristic than the sections 11 and 15. If the spring core 2 is compressed in the sections 12, 13, or 14, initially only the higher coil springs 23 are compressed. Because in the sections 12, 13, and 14 the number of the coil springs 23 per unit area is less than in the sections 11, 15, the spring core 2 exhibits a softer compression characteristic than in the sections 11 and 15.
  • the lower foam springs 33' in the sections 12, 13, 14, of the spring core 2 are compressed, and the compression characteristic becomes stiffer.
  • the relative proportion of the pocketed spring elements 31' with the foam springs 33' is higher than in the section 13. In this way, it can be achieved that the section 13 exhibits a softer and less elastic compression characteristic than the sections 12 and 14.
  • Fig. 6 illustrates a corresponding example of pocketed spring elements 21', 21 and 31.
  • each pocketed spring element 21, 21', 31 is formed of a pocket 22, 22', 32 and a spring 23, 23', 33 enclosed within the pocket 22, 22', 32, and the pockets 22, 22', 32 may be formed from one or more fabric layers, typically a non-woven fabric material, such as a non-woven polypropylene based fabric.
  • the pocket 22, 22' encloses a coil spring 23, 23'.
  • An interior portion of the coil spring 23, 23' is hollow.
  • the pocket 32 encloses a foam spring.
  • the coil springs 23, 23' and the foam springs 33 are compressible in a height direction H, which is perpendicular to the width and length directions of the pocket spring core 2.
  • the pocketed spring elements 21, 21', 31 are illustrated as being part of the same string and separated by seams 40.
  • the coil springs 23' of the pocketed spring elements 21', and also the corresponding pockets 22' have a lower height than the coil springs 23 of the pocketed spring elements 21 and than the foam springs 33 of the pocketed spring elements 31.
  • the coil springs 23 of the pocketed spring elements 21, and also the corresponding pockets 22, in turn have the same height as the foam springs 33 of the pocketed spring elements 31.
  • the pocketed spring elements 21' are interleaved with the pocketed spring elements 31'.
  • This interleaving may be based on an interleaving pattern where the pocketed spring elements 21 alternate in a one-to-one sequence with the pocketed spring elements 31'.
  • other interleaving patterns could be used as well.
  • the pocketed spring elements 21 could be interleaved with the pocketed spring elements 21' and 31.
  • Fig. 7 shows a corresponding example of how the pocketed spring elements 21, 21' 31' could be distributed in a plane defined by the width direction and the length direction of the spring core 2.
  • open circles denote positions of the pocketed spring elements 21 with the higher coil springs 23, and dotted circles denote positions of the pocketed spring elements 31 with the higher foam springs 33.
  • Hatched circles denote positions of the pocketed spring elements 21' with the lower coil springs 23'.
  • the spring core 2 includes multiple sections 11, 12, 13, 14, 15, which have different distributions of the pocketed spring elements 21, 21', 31, e.g., corresponding to head section, shoulder section, middle section, leg section, and feet section, respectively.
  • the spring core 2 has a symmetrical configuration in which the section 11 is similar to the section 15 and the section 12 is similar to the section 15.
  • the sections 11, 12, 13, 14, 15 each have a different configuration.
  • the sections 11 and 15 include only the pocketed spring elements 21 with the higher coil springs 23. In this way, these sections can be provided with a good stability.
  • the sections 12, 13, and 14 include both the pocketed spring elements 21' with the lower coil springs 23' and the pocketed spring elements 31 with the higher foam springs 33. In this way, the sections 12, 13, and 14 may be provided with a softer characteristic than the sections 11 and 15. If the spring core 2 is compressed in the sections 12, 13, or 14, initially only the higher foam springs 33 are compressed.
  • the spring core 2 typically exhibits a softer characteristic than in the sections 11 and 15.
  • the compression characteristic will typically also differ due to the difference in spring type.
  • the foam springs 33 could cause a less elastic compression characteristic.
  • the lower coil springs 23' in the sections 12, 13, 14, of the spring core 2 are compressed, and the compression characteristic becomes stiffer.
  • the relative proportion of the pocketed spring elements 31 with the foam springs 33 is higher than in the section 13. In this way, it can be achieved that the section 13 exhibits a softer and less elastic compression characteristic than the sections 12 and 14.
  • Fig. 6 and 7 refer to a scenario where the spring core 2 includes coil springs 23, 23' of different height
  • foam springs of different height e.g., by also using the pocketed spring elements 31' with the lower foam springs as explained in connection with Fig. 3 and 4 .
  • the pocket 22, 22' of the pocketed spring elements 21, 21' includes only the respective coil spring 23, 23', and the pocket 32, 32' of the pocketed spring elements 31, 31' includes only the respective foam spring 33, 33'.
  • both types of spring could be enclosed in the same pocket.
  • a hybrid spring formed of both a coil spring and a foam spring may be used in place of at least some of the coil springs of the above examples.
  • Fig. 8 illustrates a corresponding example of pocketed spring elements 21, 31 and 51 which may be used in the spring core 2.
  • each of the pocketed spring elements 21 is formed of a pocket 22 and a coil spring 23 enclosed within the pocket 22
  • each of the pocketed spring elements 31 is formed of a pocket 32 and a foam spring 33 enclosed within the pocket 32
  • each of the pocketed spring elements 51 is formed of a pocket 52 and a coil spring 53 and a foam spring 54, which are both enclosed in the pocket 52.
  • the foam spring 54 has a cylindrical shape and is included in an interior portion of the coil spring 53. In some implantations, the foam spring 54 may freely move within the coil spring 53.
  • the ability of the foam spring 54 to freely move within the interior of the coil spring may be used to enable self-adjustment of the spring core 2 to be operable regardless of which side of the spring core 2 is facing upwards. This may for example be useful when incorporating the spring core into a double-sided mattress.
  • the pockets 22, 32, 52 may be formed from one or more fabric layers, typically a non-woven fabric material, such as a non-woven polypropylene based fabric.
  • the coil springs 21, 53 and the foam springs 33, 54 are compressible in a height direction H, which is perpendicular to the width and length directions of the pocket spring core 2.
  • the pocketed spring elements 21, 31, 51 are illustrated as being part of the same string and separated by seams 40.
  • the foam springs 54 of the pocketed spring elements 51 have a lower height than the coil springs 53 of the pocketed spring elements 51. Accordingly, when starting to compress the mattress 1 in an area which includes the pocketed spring elements 51, initially only the coil springs 53 are compressed. Only when the coil springs 53 are compressed so far that they have the same height as the foam springs 54, also the foam springs 54 will be compressed. For higher compression loads, this yields a stiffer compression characteristic of the spring core 2. However, it is noted that in some implementations, the coil springs 53 and the foam springs 54 of the pocketed spring elements 51 could also have the same height.
  • the pocketed spring elements 31 are interleaved with the pocketed spring elements 51.
  • This interleaving may be based on an interleaving pattern where the pocketed spring elements 31 alternate in a one-to-one sequence with the pocketed spring elements 51.
  • other interleaving patterns could be used as well.
  • the pocketed spring elements 21 could be interleaved with the pocketed spring elements 31 and 51.
  • Fig. 9 shows a corresponding example of how the pocketed spring elements 21, 31, 51 could be distributed in a plane defined by the width direction and the length direction of the spring core 2.
  • the upper ends of the pocketed spring elements 21, 31, and 51 define a substantially planar upper surface of the spring core 2.
  • the spring core 2 includes multiple sections 11, 12, 13, 14, 15, which have different distributions of the pocketed spring elements 21, 31, 51, e.g., corresponding to head section, shoulder section, middle section, leg section, and feet section, respectively.
  • the spring core 2 has a symmetrical configuration in which the section 11 is similar to the section 15 and the section 12 is similar to the section 15.
  • the sections 11, 12, 13, 14, 15 each have a different configuration.
  • the sections 11 and 15 include only the pocketed spring elements 21 with the coil springs 23. In this way, these sections can be provided with a good stability.
  • the sections 12, 13, and 14 include both the pocketed spring elements 31 with the foam springs 33 and the pocketed spring elements 51 with the higher coil springs 53 and the lower foam springs 54. In this way, the sections 12, 13, and 14 may be provided with a softer characteristic than the sections 11 and 15. If the spring core 2 is compressed in the sections 12, 13, or 14, initially only the higher coil springs 53 and the foam springs 33 are compressed. Due to a softer and less elastic compression characteristic of the foam springs 33 as compared to the coil springs 23, the spring core 2 may exhibit a softer compression characteristic than in the sections 11 and 15.
  • the lower foam springs 54 in the sections 12, 13, 14, of the spring core 2 are compressed, and the compression characteristic becomes stiffer.
  • the relative proportion of the pocketed spring elements 31 with the foam springs 33 is higher than in the section 13. In this way, it can be achieved that the section 13 exhibits a softer and less elastic compression characteristic than the sections 12 and 14.
  • the foam springs could also be enclosed in an individual pocket which is inserted together with the foam spring into an outer pocket.
  • a corresponding example is illustrated in Fig. 10 .
  • the example of Fig. 10 is similar to that of Fig. 8 .
  • the foam springs 33 are enclosed in a further pocket 35 which is inserted together with the foam spring 33 into the pocket 32.
  • the pocket 35 may thus be regarded as an inner pocket, and the pocket 32 may be regarded as an outer pocket.
  • the inner pocket 35 may help to reduce or avoid friction between the foam spring 33 and the outer pocket 32.
  • the foam springs 54 are enclosed in a further pocket 55 which is inserted together with the foam spring 54 into the pocket 22 and the into coil spring 53.
  • the pocket 55 may be regarded as an inner pocket, and the pocket 22 may be regarded as an outer pocket.
  • the inner pocket 55 may help to reduce or avoid friction between the foam spring 54 and the coil spring 53.
  • inner pockets as illustrated in the example of Fig. 10 may be used in various ways.
  • inner pockets could be used for the foam springs 54, but not for the foam springs 33.
  • inner pockets could be used for only a subset of the foam springs 54 and/or a subset of the foam springs 33.
  • inner pockets could also be used for some or all of the foam springs 33, 33' in the examples of Figs. 2 to 7 .
  • Fig. 11 shows a flowchart for illustrating a spring core manufacturing process which may be used to manufacture a spring core as described above, e.g., the spring core 2. That is to say, the method may be used to manufacture a spring core including first pocketed spring elements, each formed of a pocket and at least a coil spring enclosed in the pocket, such as the above-mentioned pocketed spring elements 21, 21', and 51, and second pocketed spring elements, each formed of a pocket and a foam spring enclosed in the pocket, such as the above-mentioned pocketed spring elements 31, 31'.
  • first pocketed spring elements each formed of a pocket and at least a coil spring enclosed in the pocket, such as the above-mentioned pocketed spring elements 21, 21', and 51
  • second pocketed spring elements each formed of a pocket and a foam spring enclosed in the pocket, such as the above-mentioned pocketed spring elements 31, 31'.
  • coil springs are provided, such as the above-mentioned coil springs 23, 23', or 53.
  • the coil springs may be formed of a metal wire, e.g., of steel wire. In some scenarios, the coil springs may have different heights.
  • the coil springs are each enclosed in a respective pocket, such as the above-mentioned pockets 22, 22', 52.
  • a respective pocket such as the above-mentioned pockets 22, 22', 52.
  • the pockets may be formed of one or more fabric layers, e.g., a non-woven fabric.
  • the pockets may be formed by welding the fabric layer(s).
  • a foam spring may be enclosed together with the coil spring in the pocket, e.g., as explained for the pocketed spring elements 51, which include the foam spring 54 in addition to the coil spring 53.
  • foam springs are provided, such as the above-mentioned foam springs 33, 33.
  • the foam springs may be formed as foam cylinders or pegs.
  • the foam springs may be formed of various foam materials, e.g., a flexible polyurethane foam, a visco-elastic foam, a latex rubber foam, or a memory foam.
  • the foam springs may have different heights.
  • the foam springs could differ with respect to their foam material.
  • some of the foam springs could be formed of a memory foam, while others of the foam springs could be formed of a flexible polyurethane foam.
  • the foam springs are each enclosed in a respective pocket, such as the above-mentioned pockets 32, 32'.
  • a respective pocket such as the above-mentioned pockets 32, 32'.
  • the pockets may be formed of one or more fabric layers, e.g., a non-woven fabric.
  • the pockets may be formed by welding the fabric layer(s).
  • steps 1120 and 1140 may actually be combined, e.g., in a process which forms strings of pocketed spring elements, in which the above-mentioned first pocketed spring elements and the above-mentioned second pocketed spring elements are interleaved.
  • the first pocketed spring elements and the second pocketed spring elements are joined to form the spring core. This may for example involve joining strings of pocketed spring elements which include the first pocketed spring elements and the second pocketed spring elements.
  • the first pocketed spring elements and the second pocketed spring elements may for example be joined by gluing, welding, or some other assembly process.
  • the pocketed spring elements of different examples may be combined in the same spring core.
  • a wide variety of coil springs or foam springs may be used, without limitation to the illustrated.
  • cylindrical coil springs also barrel-shaped coil springs could be used.
  • the foam springs do not need to be cylindrical, but could also be cuboid shaped, barrel shaped, or cone shaped.
  • the dimensions of the springs may be selected in various ways. For example if a foam spring is inserted into a spring coil, like in the example of Fig. 8 , the outer diameter of the foam spring may match the inner diameter of the coil spring.
  • the outer diameter of the foam spring could also be smaller than the inner diameter of the coil spring.
  • the outer diameter of the inner pocket enclosing the foam spring may match the inner diameter of the coil spring.
  • the outer diameter of the inner pocket enclosing inner pocket enclosing the foam spring could also be smaller than the inner diameter of the coil spring.
  • the outer diameter of the inner pocket enclosing the foam spring may match the inner diameter of the outer pocket.
  • the outer diameter of the inner pocket enclosing the foam spring could also be smaller by some margin than the inner diameter of the outer pocket.
  • the height of the inner pocket enclosing the foam spring may match the inner height of the outer pocket while in other cases the height of the inner pocket enclosing the foam spring could be smaller by some margin than the inner height of the outer pocket.
  • the illustrated spring cores could include various additional pocketed spring elements.
  • Figs. 3 , 5 , 7 , and 9 are exemplary and that other configurations of sections are possible as well.
  • one or more different sections could be arranged along the width direction.
  • one section could extend around another section.
  • one section 11' formed of the spring elements 21 could extend along all four edges of the spring unit 2 and enclose the sections 12, 13, and 14, which may have similar distributions of spring elements as in the examples of Figs. 3 , 5 , 7 , and 9 .
  • a corresponding example is illustrated in Fig. 12 .
  • spring core is part of a mattress
  • same or similar spring cores could also be used in various other kinds of bedding or seating products, such as in sofas or seats, e.g., as part of a sofa cushion or seat cushion.

Landscapes

  • Mattresses And Other Support Structures For Chairs And Beds (AREA)
  • Springs (AREA)
EP17170763.1A 2017-05-12 2017-05-12 Noyau de ressort à ressort ensaché et ressorts en mousse Withdrawn EP3400844A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17170763.1A EP3400844A1 (fr) 2017-05-12 2017-05-12 Noyau de ressort à ressort ensaché et ressorts en mousse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17170763.1A EP3400844A1 (fr) 2017-05-12 2017-05-12 Noyau de ressort à ressort ensaché et ressorts en mousse

Publications (1)

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EP3400844A1 true EP3400844A1 (fr) 2018-11-14

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110328309A (zh) * 2019-06-27 2019-10-15 浙江华剑智能装备有限公司 袋装弹簧串输送装置和方法及弹簧芯体生产设备和方法
CN110960018A (zh) * 2019-12-21 2020-04-07 福鼎诺一家居设计有限公司 一种可以阻止坐垫弹性减弱的弹簧沙发

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2403901A (en) * 2003-07-02 2005-01-19 Harrison A Mattress incorporating duplex springs
DE60310608T2 (de) * 2002-10-29 2007-09-27 Stjernfjädrar Ab Unterschiedlich hohe taschenmatratze
US20090100606A1 (en) * 2007-10-09 2009-04-23 Jung Ho An Mattress
US8266745B2 (en) 2007-02-07 2012-09-18 L&P Property Management Company Slow acting pocketed spring core having fill material inside pockets
US20160367042A1 (en) * 2015-06-22 2016-12-22 Herman Franklin Fisher Pocketed foam systems and methods

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60310608T2 (de) * 2002-10-29 2007-09-27 Stjernfjädrar Ab Unterschiedlich hohe taschenmatratze
GB2403901A (en) * 2003-07-02 2005-01-19 Harrison A Mattress incorporating duplex springs
US8266745B2 (en) 2007-02-07 2012-09-18 L&P Property Management Company Slow acting pocketed spring core having fill material inside pockets
US20090100606A1 (en) * 2007-10-09 2009-04-23 Jung Ho An Mattress
US20160367042A1 (en) * 2015-06-22 2016-12-22 Herman Franklin Fisher Pocketed foam systems and methods

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110328309A (zh) * 2019-06-27 2019-10-15 浙江华剑智能装备有限公司 袋装弹簧串输送装置和方法及弹簧芯体生产设备和方法
CN110960018A (zh) * 2019-12-21 2020-04-07 福鼎诺一家居设计有限公司 一种可以阻止坐垫弹性减弱的弹簧沙发
CN110960018B (zh) * 2019-12-21 2021-08-10 北京大为家具集团有限公司 一种可以阻止坐垫弹性减弱的弹簧沙发

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