EP0748599B1 - Améliorations aux sacs à dos - Google Patents

Améliorations aux sacs à dos Download PDF

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Publication number
EP0748599B1
EP0748599B1 EP96304005A EP96304005A EP0748599B1 EP 0748599 B1 EP0748599 B1 EP 0748599B1 EP 96304005 A EP96304005 A EP 96304005A EP 96304005 A EP96304005 A EP 96304005A EP 0748599 B1 EP0748599 B1 EP 0748599B1
Authority
EP
European Patent Office
Prior art keywords
backpack
stay
horizontal
shape
stays
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.)
Expired - Lifetime
Application number
EP96304005A
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German (de)
English (en)
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EP0748599A1 (fr
Inventor
Aarn Tate
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Individual
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Individual
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Filing date
Publication date
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Publication of EP0748599A1 publication Critical patent/EP0748599A1/fr
Application granted granted Critical
Publication of EP0748599B1 publication Critical patent/EP0748599B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45F—TRAVELLING OR CAMP EQUIPMENT: SACKS OR PACKS CARRIED ON THE BODY
    • A45F3/00—Travelling or camp articles; Sacks or packs carried on the body
    • A45F3/04—Sacks or packs carried on the body by means of two straps passing over the two shoulders
    • A45F3/08—Carrying-frames; Frames combined with sacks

Definitions

  • This invention concerns improvements in and relating to backpacks.
  • Backpacks generally comprise a bag having usually one main and other smaller compartments to be carried on the back by means of shoulder straps and optionally a hip belt.
  • Human backs have a shallow "s" shape vertically and a convex shape horizontally.
  • that part of the bag (backpack) which contacts the back should have a similar shape in order to spread the load over the back. Additionally, it is desirable to bring the centre of gravity of the load being carried as far forward as possible, so that there is less likelihood of the carrier having to lean forwards, which can cause back strain.
  • the main way of trying to achieve a desirable back panel shape is to include in or on the backpack a frame which can control the shape of the back panel.
  • a common internal frame has a pair of vertical stays.
  • that type of frame often produces a most undesirable back panel shape.
  • the back panel tends to round into a convex shape horizontally, which is the opposite of a natural back shape. That concentrates the load down the spine and puts the centre of gravity of the load far from the back, causing a stooping posture for the carrier and hence back strain.
  • Another type of internal frame system is a flat plastic frame sheet. That keeps the back panel flat, so that the above-mentioned undesirable convex shape is avoided and brings the centre of gravity of the load nearer to the back. Whilst posture is improved and back strain lessened with this system, it is not entirely satisfactory because the load is not spread over the full width of the back.
  • External frame systems can achieve a concave shape for a backpack but have other drawbacks.
  • Such frames are generally rigid and constructed from relatively thick stays. The thickness of the frame increases the distance between the backpack and the back, which puts extra strain on the back. These frames cannot be bent to match the back shape and they have a high centre of gravity making them top heavy for active endeavours, such as skiing. Furthermore, the rigid frame resists body movement and the frame is bulky and awkward to manage.
  • US-A-4040548 discloses a backpack having a compartment for items to be transported on the back of a carrier, the backpack having a back frame comprising at two vertical stays and horizontal stays, the two vertical stays being generally S-shaped to present to the carrier's back a lower convex part, a middle concave part and an upper convex part and one of the horizontal stays having a generally concave shape and being positioned so that it will lie across the lower convex part of the vertical stays, at least one of the stays being made from a material that is deformable to a desired shape.
  • An object of this invention is to improve backpack frames in order to eliminate or at least reduce the effect of the above-mentioned disadvantages of known backpack frames.
  • a backpack having a compartment for items to be transported on the back of a carrier, a back frame comprising one central vertical stay and at least one horizontal stay, the vertical stay being undulating form to present to the carrier's back a lower convex part followed by a concave part, and the at least one horizontal stay having a generally concave shape in a horizontal direction and being positioned so that it will lie across the lower convex part of the vertical stay, at least one of the stays being made of a material that is deformable to a desired shape.
  • the vertical stay comprises a lower convex part followed by a concave part, and an upper convex part.
  • the back frame comprises one vertical stay and two horizontal stays, the horizontal stays extending to either side of the vertical stay.
  • the "S" shape of the vertical stay is chosen to follow generally the normal contours of the back but preferably can be adjusted by bending to match more closely the back shape of the person who will carry the backpack.
  • One of the horizontal stays is preferably positioned so that it will lie across the carrier's back at or near shoulder height.
  • the lower horizontal stay is positioned so that it will lie across the small of the back at above waist height.
  • the upper horizontal stay may be at the top end of the vertical stay, although for some embodiments it is preferred that the vertical stay extend further upwards and rearwardly relative to the carrier of the backpack to allow for head movement without restriction.
  • a relatively rigid sheet member may be provided above the upper horizontal stay, the sheet being generally shaped to give the upper part of the backpack a concave shape.
  • a similar sheet may be provided in a lower region of the backpack, preferably below the lower horizontal stay.
  • This lower sheet is ideally shaped to follow the curve of the main vertical stay.
  • the frame may further comprise outer frame members along side corners of the backpack at or beyond each of the horizontal stays but not necessarily connected thereto.
  • These outer members are preferably of flexible material, such as plastics rod and may be shaped to follow the general contours of the back i.e. may also be S-shaped.
  • the backpack further comprises an outer frame member which is a continuous inverted generally U-shaped member.
  • the preferred material for horizontal and single vertical stays of any embodiment of the invention is one that once bent into a particular shape will substantially retain that shape. Aluminium and aluminium alloys are preferred materials for these stays.
  • back frames of the inventions are preferably fitted in sleeves of the backpack preferably as separate items, so that they can be removed for bending to a desired configuration to suit the back shape of the person to carry the backpack.
  • outer flexible frame members When outer flexible frame members are provided in a backpack, preferably their lower parts are bent forwards so as to lie more or less on the carrier's sides rather than back. Usually however, the backpack will curve rearwards in that region following the back's contour, in which case, the flexible outer frame members will have their lower parts connected to the backpacks by connecting panels or webs.
  • a three part construction is used for backpacks of the first embodiment of the invention comprising a pair of vertical panels fastened side by side that extend over a major part of the back panel and a top horizontal panel.
  • the vertical panels when laid flat are mirror images of each other and preferably have a gentle overall S-shape.
  • the top panel when laid flat is preferably curved, its inside curve being fastened to stop edges of the other vertical panels.
  • the top panel may be omitted for other embodiments of the invention.
  • shoulder straps are usually provided that extend from an upper part of the backpack over the shoulder to a lower part of the backpack. Additionally, a hip belt may be provided. Shoulder straps and hip belts are generally padded for comfort but often there is insufficient give in the shoulder straps or hip belt for comfort.
  • either or both be made of an elastic material stretchable in desired directions.
  • a shoulder strap for a backpack or the like is preferably made of an elastic material which is constrained against stretching in a lengthwise direction over at least part of its length.
  • a shoulder strap of the invention may stretch horizontally to fit more closely to the shape of the carrier's shoulder and to follow the body shape below the arms. Furthermore, the elastic nature of the strap absorbs the shock of the load of the backpack and gives with shoulder movements.
  • one or more strips of generally non-stretchable fabric may be fixed to the shoulder straps extending vertically. Fixing of the non-stretchable fabric may be by any suitable means, such as, for example, by stitching or by adhesive.
  • a suitable elastic material for shoulder straps of the invention is a rubber material, such as neoprene, preferably with a stretch fabric laminated to either or both sides.
  • Shoulder straps according to this aspect of the invention may be used on backpacks according to the first aspect of the invention as well as other backpacks or indeed other shoulder carrier items.
  • hip belts for backpacks are either parallel sided or conically cut. Parallel sided hip belts have to be pulled tightly to grab a persons sides so the hip belt does not slip down. Conically cut hip belts try to solve this problem with a narrower fit at the top. However, this creates pressure points at the top of the hip bone, where there is little muscle, causing bruising.
  • Hip belts for backpacks of the invention preferably comprise a band of relatively stretchable fabric surmounted by a band of relatively non-stretchable fabric.
  • a backpack 10 comprises a main bag compartment 12. Smaller side or rear compartments may be provided but these are not shown for simplicity.
  • the compartment 12 has a closure flap 14, which may be fastened in any suitable way.
  • the backpack 10 has a back panel 16, which lies against the back of a carrier.
  • the back panel 16 includes a frame 18 made up of separate components that are contained in fabric sleeves.
  • the frame 18 comprises a main vertical stay 20 of a material that can be bent to a desired shape and retain that shape, i.e. a shape memory material, such as a flat strip of aluminium.
  • the stay 20 has a basic shallow S-shape to suit the general contour of the human back.
  • Two horizontal stays 22 and 24 are provided which are shaped to give a concave appearance to the back panel. Those stays are made of the same material as the vertical stay.
  • the upper stay 22 is intended to be in the region of the shoulders of the carrier and the lower stay 24 is in the region of the small of the back.
  • the vertical stay 20 does extend slightly above the upper horizontal stay 22 where it curves rearwards so that in use the backpack does not interfere with head movement.
  • An additional support in the form of a flat curved sheet 26 is provided just above the upper stay 22.
  • the backpack 10 will have shoulder straps and a hip belt but these have been omitted from the drawings for simplicity.
  • the frame 18 allows the backpack to fit snugly onto the back of the carrier.
  • the vertical and horizontal stays 20, 22 and 24 can each be removed from their respective sleeves and bent to suit the shape of the carrier's back more closely.
  • the back panel of the backpack of Figure 1 is constrained by its frame to take a particular shape, the back panel is ideally produced from three fabric panels as illustrated in Figures 5 and 6 of the accompanying drawings.
  • Figure 5 is for a back panel with connecting panels 30
  • Figure 6 is for a back panel with webs 32.
  • the three fabric panels are generally a top horizontal panel 40 and two vertical panels 42 and 44 which are mirror images of each other.
  • the top panel 40 is generally arcuate and the two vertical panels 42, 44 have a gentle S-shape.
  • the edges of each panel to be joined together preferably by stitching are indicated by double-headed arrows.
  • a backpack 60 which is a zip opening pack with a curved top.
  • the pack 60 has a back panel 62 and a frame 64 made of separate components fitted in sleeves (not shown) of the back panel.
  • the frame 64 has vertical stay 66 centrally of the back panel made of a shape memory material and generally S-shaped when viewed from the side to follow the contours of a human back.
  • a horizontal stay 68 is provided in a lower part of the back panel and is arcuate so as to produce a concave shape for the back panel.
  • a hoop 70 of flexible plastic rod is provided around the perimeter of the back panel.
  • the flexible hoop 70 has legs 72 whose lower ends curve forwards away from the back panel but remain connected by connecting panels 74 or by connecting webs.
  • the vertical and horizontal stays are removable from their respective sleeves so that they can be bent to shape to suit the carrier. How the backpack 60 fits a carrier's back is shown in Figure 4 of the drawings.
  • the back panel 62 To enable the back panel 62 to take up more easily a shape determined by the frame the back panel is made from specially shaped fabric panels 74 and 76 as shown in Figure 7 of the drawings.
  • Carrying straps for this backpack have been omitted from the drawings for simplicity but would include shoulder straps and probably a hip belt.
  • shoulder straps 200 suitable for the illustrated backpacks or indeed any other type of backpack are shown in Figure 8 of the accompanying drawings.
  • the shoulder straps 200 illustrated are made of an elastic material such as neoprene laminated on both sides with a stretch fabric so that they can stretch as indicated by the broken lines to accommodate different shoulder shapes and slopes.
  • webs 202 are stitched onto the shoulder straps.
  • the webs 202 are narrow relative to the shoulder straps so that the elastic material either side thereof can still stretch to curve at its sides to follow the body contour, especially near the arm pits.
  • the shoulder straps 200 will be fastened to a back panel in a conventional manner including the provision of length adjustment.
  • the hip belt 300 will be connected to lower parts of a backpack and is intended to fit around the carrier's hips.
  • the hip belt 300 is made of main band 302 of elastic material, such as neoprene laminated with stretch fabric on both sides, and a top band 304 of generally non-elastic material stitched to the main band.
  • the hip belt is fastened by a buckle 306.
  • the main band 302 forms a lower section of the hip belt which in use will stretch vertically and laterally to mould itself to the hip shape of the carrier whilst the non-elastic top bands sits around the waist and prevents the hip belt from slipping downwards.
  • the elastic nature of the main band allows extended leg movement and avoids pressure points.

Landscapes

  • Portable Outdoor Equipment (AREA)
  • Catching Or Destruction (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)

Claims (26)

  1. Sac à dos (10) comportant un compartiment (12) pour des articles à transporter sur le dos d'un porteur, un cadre arrière (18) comprenant une baguette verticale centrale (20) et au moins une baguette horizontale (68), la baguette verticale (20) présentant une forme ondulée afin de présenter au dos du porteur au moins une partie convexe inférieure suivie par une partie concave, et ladite au moins une baguette horizontale (68) présentant une forme généralement concave dans une direction horizontale par rapport au dos du porteur et étant positionnée de sorte qu'elle se trouve en travers de la partie convexe inférieure de la baguette verticale (20), au moins l'une des baguettes étant réalisée en un matériau qui est capable de se déformer selon une forme souhaitée.
  2. Sac à dos (10) selon la revendication 1, dans lequel la baguette verticale (20) comprend une partie convexe inférieure suivie d'une partie concave et d'une partie convexe supérieure.
  3. Sac à dos (10) selon l'une quelconque des revendications 1 ou 2, dans lequel le cadre arrière (18) comprend deux baguettes horizontales (22, 24) s'étendant des deux côtés de la baguette verticale (20).
  4. Sac à dos (10) selon la revendication 3, dans lequel l'une desdites deux baguettes horizontales est une baguette horizontale supérieure (22) positionnée de manière à se trouver en travers de la partie convexe supérieure de la baguette verticale (20).
  5. Sac à dos (10) selon la revendication 3 ou 4, comprenant, de plus, un élément en feuille relativement rigide (26) au-dessus de la baguette horizontale supérieure (22), la feuille (26) étant généralement formée de manière à donner au sac à dos (10) une forme concave dans une direction horizontale dans cette région.
  6. Sac à dos (10) selon l'une quelconque des revendications 1 à 5, comprenant, de plus, un élément en feuille relativement rigide (34) au-dessus de la baguette horizontale inférieure (24), la feuille (34) étant généralement formée de manière à donner au sac à dos (10) une forme concave dans une direction horizontale dans cette région.
  7. Sac à dos (10) selon l'une quelconque des revendications 1 à 6, dans lequel le cadre (18) comprend, de plus, des éléments de cadre verticaux extérieurs (28) le long des coins latéraux du sac à dos (10), au niveau ou au-delà de chacune des baguettes horizontales (22, 24), et reliés, de manière facultative, à celles-ci.
  8. Sac à dos (10) selon la revendication 7, dans lequel les éléments de cadre extérieurs (28) sont réalisés en un matériau flexible.
  9. Sac à dos (10) selon la revendication 7 ou 8 avec la revendication 6, comprenant, de plus, une bande (36) reliant les extrémités inférieures des éléments de cadre extérieurs (28) et passant derrière l'élément en feuille inférieur (34).
  10. Sac à dos (10) selon l'une quelconque des revendications 1 à 9, dans lequel la baguette verticale centrale (20) est réalisée en un matériau qui, une fois plié selon une forme particulière, conservera sensiblement cette forme.
  11. Sac à dos (10) selon l'une quelconque des revendications 1 à 10, dans lequel la baguette verticale centrale (20) est réalisée en un matériau sélectionné parmi l'aluminium et les alliages d'aluminium.
  12. Sac à dos (10) selon l'une quelconque des revendications 1 à 11, dans lequel la ou chaque baguette horizontale (22, 24) est réalisée en un matériau qui, une fois plié selon une forme particulière, conservera sensiblement cette forme.
  13. Sac à dos (10) selon l'une quelconque des revendications 1 à 12, dans lequel la ou chaque baguette horizontale (22, 24) est réalisée en un matériau sélectionné parmi l'aluminium et les alliages d'aluminium.
  14. Sac à dos (10) selon l'une quelconque des revendications 1 à 13, dans lequel les composants du cadre sont engagés dans des manchons du sac à dos.
  15. Sac à dos (10) selon l'une quelconque des revendications 1 à 14, comportant des bretelles (200) réalisées en un matériau élastique et où les bretelles (200) sont étirables latéralement mais maintenues contre un étirement dans le sens de la longueur sur au moins une partie de leur longueur..
  16. Sac à dos (10) selon l'une quelconque des revendications 1 à 15, comportant une ceinture (300) réalisée en un matériau élastique, dans lequel la ceinture (300) comporte une section supérieure (304) et une section inférieure (302) et est étirable verticalement et latéralement dans les sections inférieures (302) mais est maintenue contre un étirement latéralement et verticalement dans la section supérieure (304).
  17. Sac à dos (60) selon la revendication 1, dans lequel le sac à dos (60) comprend, de plus, un élément de cadre extérieur (70) qui est un élément inversé continu généralement en forme de U.
  18. Sac à dos (60) selon la revendication 17, dans lequel l'élément de cadre extérieur (70) est réalisé en un matériau flexible.
  19. Sac à dos (60) selon la revendication 17 ou 18, dans lequel l'élément de cadre extérieur (70) est formé de manière à suivre les contours du dos d'un porteur.
  20. Sac à dos (60) selon l'une quelconque des revendications 17, 18 ou 19, dans lequel la baguette centrale verticale (66) est réalisée en un matériau qui, une foís plié selon une forme particulíère, conservera sensiblement cette forme.
  21. Sac à dos (60) selon l'une quelconque des revendications 17 à 20, dans lequel la baguette centrale verticale (66) est réalisée en un matériau sélectionné parmi l'aluminium et les alliages d'aluminium.
  22. Sac à dos selon l'une quelconque des revendications 17 à 21, dans lequel les baguettes horizontales (68) sont réalisées en un matériau qui, une fois plié selon une forme particulière, conservera sensiblement cette forme.
  23. Sac à dos selon l'une quelconque des revendications 17 à 22, dans lequel les baguettes horizontales (68) sont réalisées en un matériau sélectionné parmi l'aluminium et les alliages d'aluminium.
  24. Sac à dos selon l'une quelconque des revendications 17 à 23, dans lequel les composants du cadre sont engagés dans des manchons du sac à dos.
  25. Sac à dos selon l'une quelconque des revendications 17 à 24, comportant des bretelles (200) réalisées en un matériau élastique et dans lequel les bretelles (200) sont étirables latéralement mais sont maintenues contre un étirement dans le sens de la longueur sur au moins une partie de leur longueur.
  26. Sac à dos (60) selon l'une quelconque des revendications 17 à 25, comportant une ceinture (300) réalisée en un matériau élastique, dans lequel la ceinture (300) comporte une section supérieure (304) et une section inférieure (302) et est étirable verticalement et latéralement dans la section inférieure (302) mais maintenue contre un étirement latéralement et verticalement dans la section supérieure (304).
EP96304005A 1995-06-13 1996-06-03 Améliorations aux sacs à dos Expired - Lifetime EP0748599B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9511925 1995-06-13
GBGB9511925.1A GB9511925D0 (en) 1995-06-13 1995-06-13 Improvements in and relating to backpacks

Publications (2)

Publication Number Publication Date
EP0748599A1 EP0748599A1 (fr) 1996-12-18
EP0748599B1 true EP0748599B1 (fr) 2001-08-16

Family

ID=10775941

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96304005A Expired - Lifetime EP0748599B1 (fr) 1995-06-13 1996-06-03 Améliorations aux sacs à dos

Country Status (6)

Country Link
EP (1) EP0748599B1 (fr)
JP (1) JPH08336421A (fr)
AT (1) ATE204143T1 (fr)
DE (1) DE69614454T2 (fr)
GB (2) GB9511925D0 (fr)
NZ (1) NZ286765A (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69721083D1 (de) * 1997-01-06 2003-05-22 Global Act Ab Torekov Rucksack
EP1051928B1 (fr) * 1997-01-06 2003-04-16 Global Act Aktiebolag Sac à dos
SE516613C2 (sv) * 2000-06-22 2002-02-05 Global Act Ab Ryggsäck
JP4540190B2 (ja) * 2000-07-10 2010-09-08 ニューデルタ工業株式会社 背負式防除機
US7644847B2 (en) 2005-05-31 2010-01-12 Howell Frank A Flexible pack frame
GB0806359D0 (en) * 2008-04-08 2008-05-14 Scott Health & Safety Ltd Carrying system for breathing apparatus
US8181834B1 (en) 2009-06-03 2012-05-22 Here be Dragons;LLC Backpack
JP7373764B2 (ja) * 2019-05-10 2023-11-06 株式会社コーホー 背負子式ゴルフ練習用具
US20230301420A1 (en) 2022-03-24 2023-09-28 Christopher R. Bolinger Collapsible backpack system
DE102022119746A1 (de) 2022-08-05 2024-02-08 Lindnerhof-Taktik GmbH Tragegestell

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4040548A (en) * 1976-03-17 1977-08-09 Guglielmo Joe H Flexible back pack frame
US4074839A (en) * 1976-05-10 1978-02-21 Wood Thomas E Internal frame backpack
ZA764244B (en) * 1976-07-16 1977-12-28 Sit N Sun Prod Ltd Knapsack frame
FR2486783A3 (fr) * 1980-07-16 1982-01-22 Millet Sacs Sac a dos
FR2633812B1 (fr) * 1988-07-11 1991-05-24 Millet Armature de sac a dos
US5131576A (en) * 1990-09-17 1992-07-21 Kent Turnipseed Backpack support device
US5236112A (en) * 1991-07-31 1993-08-17 Mont-Bell Co., Ltd. Back bag
IT1256735B (it) * 1992-12-17 1995-12-15 Cartiere Paolo Pigna Spa Zaino a tracolla provvisto di schienale anatomicamente adattabile
US5361955A (en) * 1992-12-21 1994-11-08 Bianchi International Modular backpack

Also Published As

Publication number Publication date
DE69614454D1 (de) 2001-09-20
GB2302646A (en) 1997-01-29
EP0748599A1 (fr) 1996-12-18
ATE204143T1 (de) 2001-09-15
GB9511925D0 (en) 1995-08-09
DE69614454T2 (de) 2002-04-11
GB9611524D0 (en) 1996-08-07
JPH08336421A (ja) 1996-12-24
NZ286765A (en) 1998-06-26
GB2302646B (en) 1999-01-27

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