EP3256019A1 - Pole having a tip spring mechanism - Google Patents
Pole having a tip spring mechanismInfo
- Publication number
- EP3256019A1 EP3256019A1 EP16701945.4A EP16701945A EP3256019A1 EP 3256019 A1 EP3256019 A1 EP 3256019A1 EP 16701945 A EP16701945 A EP 16701945A EP 3256019 A1 EP3256019 A1 EP 3256019A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stick
- axial
- section
- insertion element
- end attachment
- 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.)
- Granted
Links
- 230000007246 mechanism Effects 0.000 title description 2
- 238000003780 insertion Methods 0.000 claims abstract description 76
- 230000037431 insertion Effects 0.000 claims abstract description 76
- 229920001971 elastomer Polymers 0.000 claims abstract description 19
- 239000000806 elastomer Substances 0.000 claims abstract description 19
- 230000004323 axial length Effects 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 241001166076 Diapheromera femorata Species 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 2
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000013016 damping Methods 0.000 description 46
- 239000013536 elastomeric material Substances 0.000 description 7
- 239000000725 suspension Substances 0.000 description 6
- 229920002725 thermoplastic elastomer Polymers 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920006347 Elastollan Polymers 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229920009204 Methacrylate-butadiene-styrene Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920002614 Polyether block amide Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
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- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920002742 polystyrene-block-poly(ethylene/propylene) -block-polystyrene Polymers 0.000 description 1
- 229920002743 polystyrene-poly(ethylene-ethylene/propylene) block-polystyrene Polymers 0.000 description 1
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- 229920001169 thermoplastic Polymers 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B9/00—Details
- A45B9/04—Ferrules or tips
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H3/00—Appliances for aiding patients or disabled persons to walk about
- A61H3/02—Crutches
- A61H3/0277—Shock absorbers therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H3/00—Appliances for aiding patients or disabled persons to walk about
- A61H3/02—Crutches
- A61H3/0288—Ferrules or tips therefor
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B9/00—Details
- A45B2009/005—Shafts
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B2200/00—Details not otherwise provided for in A45B
- A45B2200/05—Walking sticks
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B2200/00—Details not otherwise provided for in A45B
- A45B2200/05—Walking sticks
- A45B2200/055—Walking sticks for Nordic walking
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H3/00—Appliances for aiding patients or disabled persons to walk about
- A61H3/02—Crutches
- A61H3/0277—Shock absorbers therefor
- A61H2003/0283—Shock absorbers therefor using elastomeric material
Definitions
- the present invention relates to a tip body for a stick, in particular a Nordic Walking stick, walking stick, ski pole, cross country ski poles, or walking stick, with a suspension for the purpose of damping the axial force by the support movement of the user; and a stick with such a tip body.
- the invention is therefore inter alia the object of proposing an improved, easy to manufacture and pollution-insensitive damping device for a telescopic stick, especially for example for a telescopic stick with external clamping system, the damping device should be easy to produce, and as slim as possible, ie in terms of axial and circumference Extension, should be designed.
- the peak damping is particularly advantageous on a stick, for example, has at least two telescoping pipe sections (eg touring pole), and an external clamping system for length adjustment or for releasably fixing the relative axial position of at least two having telescoping pipe sections to each other.
- the construction is equally applicable to telescopic systems with internal clamping or with internal and external clamps.
- a stick especially a Nordic walking stick, walking stick, ski pole, cross-country pole, or walking stick
- a stick body at the lower free end of a tip body is provided.
- the tip body has a downwardly closed end cap with a central receiving opening. This serves to receive a lowermost pipe section of the stick body.
- the central receiving opening may serve to receive a male member which is received and fixed to an upper axial portion in the lowermost tubular portion of the pole body and received with a lower axial portion in the central receiving opening of the end cap.
- the male element serves as a link between the lowest pipe section and the end cap.
- damping element On the bottom of the blind hole of the end cap while another damping element can be provided as a stop damping, such as a disc made of elastic material. Alternatively, such a further damping element can also be arranged and fastened on and / or in the element impinging on this floor. Furthermore, the tip body on an axially above an upper end of the end cap subsequent outer circumferential elastic elastomeric spring element which at least partially surrounds the bottom tube portion of the stick body, or - according to the above alternative - a central axial portion of the insertion element in the circumferential direction.
- An elastomeric spring element is to be understood as meaning an element which represents a highly elastically deformable body and both springs and dampens, eg in the form of a foam spring (eg PU) or an elastic solid body, in each case with a central passage opening.
- This elastomeric spring element dampens and cushions an axial relative movement of the lowermost tube section of the pole body relative to the end cap and / or the insertion element when an axial force is exerted on the pole from above.
- the lowermost tube section of the pole body or possibly also the insertion element is displaceably mounted axially against a spring force of the elastomer spring element in the central receiving opening of the end cap.
- the elastomeric spring element when considered external Circumferential elastic elastomeric spring element is referred to, is a preferably substantially hollow cylindrical element (possibly with a textured surface and end portions) made of elastomeric material whose outer surface forms the outer surface of the tip body. In other words, it peripherally surrounds the other components of the tip body in a certain axial section.
- thermoplastic elastomers come in question materials of various types, for example TPE-O, ie thermoplastic elastomers based on olefin, eg PP / EPDM, z. B.
- thermoplastic elastomers based on olefins, eg PP / EPDM, eg. Sarlink, Forprene, TPE-U ie urethane-based thermoplastic elastomers, e.g. Elastollan (BASF) or Desmopan, Texin, Utechllan (Bayer); TPE-E, ie thermoplastic polyester elastomers / thermoplastic copolyesters, e.g.
- TPE-S ie styrene block copolymers SBS, SEBS, SEPS, SEEPS and MBS
- B. Styroflex BASF
- Septon uraray
- Thermolast Kraiburg TPE
- Saxomer Polyplast Compound Werk GmbH
- TPE-A ie thermoplastic copolyamides, eg. B. PEBAX (Arkema). It is important to ensure temperature compatibility (hot and cold), and sprayability.
- the tip body further comprises an upper stop member, which is preferably attached to a shoulder at the lowermost tubular portion of the pole body, or at the lower end of the upper axial portion of the male member and provides an upper stop for the elastomeric spring member.
- the elastomeric spring element is arranged axially between a arranged at the upper end of the end cap lower stop and the upper stop.
- the elastomeric spring element at the top and / or bottom stop by means of a positive connection, in particular a tongue and groove connection, such as a dovetail connection, and / or alternatively or additionally by means of a material connection, in particular an adhesive or welded connection, or even melted or molded, or slipped over as a sleeve attached.
- a positive connection in particular a tongue and groove connection, such as a dovetail connection
- a material connection in particular an adhesive or welded connection, or even melted or molded, or slipped over as a sleeve attached.
- the upper stop and / or the lower stop for the elastomer spring element may alternatively also be designed as a radially extending planar surface on the upper stop element or at the upper end of the end cap, which extends at a substantially right angle to the longitudinal axis of the stock, substantially parallel to a pad on which the stick is supported by the user.
- connection of the adjacent surfaces can then For example, be achieved by an adhesive bond, welded connection, or even melted or molded.
- the end cap, the elastic element and the upper stop element are integrally connected, preferably hermetically sealed together. This can be achieved for example by a multi-component injection molding or Maisgeschweisst.
- a radial transverse pin is further arranged on the tip body, which projects radially through the end cap and the lowermost tube section or the insertion element in a middle or lower portion in a direction transverse to the longitudinal axis of the stock.
- a passage opening is arranged in the end cap, which extends from a point in the wall to a circumferentially opposite in the wall of the end cap.
- the lowermost tube section or the lower axial section of the insertion element has at least one axial elongated hole for guiding the transverse pin, preferably two longitudinally opposite slots in the respective wall, so that the radial transverse pin within the limits of the at least one axial slot under the action of an axial force from above on the stick body against the spring force of the elastic member is axially displaceably mounted.
- the slot preferably has a length of 0.5-3 cm, particularly preferably 0.7- 1.5 cm, most preferably 0.8-1.3 cm.
- the leadership of a transverse pin also allows a rotational stability, or an anti-rotation of each other axially displaceable parts. By incorporating the guidance of the suspension inside the tip body, the damping system becomes less susceptible to contamination or corrosion due to weather conditions.
- the transverse pin can be arranged below the plate sleeve, it is then not losable, trapped, and hermetically sealed, it can not enter impurities.
- the non-elastic elements of the body may be made of materials such as polyamide, e.g. PA66.
- the end cap advantageously has an axial length of 3-15 cm, preferably 5-12 cm, more preferably 7-10 cm. Additionally or alternatively, the insertion element advantageously has an axial length of 2-12 cm, preferably 3-10 cm, particularly preferably 5-8 cm.
- the insertion element is preferably made of aluminum, alternatively of other metals, plastic or of a metal-plastic compound. In the case of plastics, above all, too fiber-reinforced plastics of advantage.
- the elastomeric spring element has an axial length of in the range of 0.5-4 cm, preferably of 1-3 cm, more preferably of 1.5-2 cm, and advantageously a radial thickness (measured from the outer wall of the encompassed portion of the pipe section or the insertion element to the periphery) in the range of 0.2-1 cm, preferably 0.4-0.8 cm, particularly preferably 0.5-0.7 cm.
- the lowermost pipe section has a shoulder, on which the lowermost pipe section tapers axially downwards, so that the diameter of the lowermost pipe section axially below the shoulder is smaller than the diameter of the lowermost pipe section axially above the shoulder, wherein the Paragraph serves as an upper stop for the tip body.
- the end cap is preferably formed closed on a free end facing a pad. This can be achieved either by the formation of the central receiving opening as a blind hole, or in that at one of a pad facing end of the end cap from below as a stick tip serving pin, preferably an insert with a hard metal tip or a hard metal pin, embedded and preferably in the central receiving opening of the end cap is attached.
- a buffer or a stick plate may be attached to the end cap, wherein in the case of fixing a stick plate on a stick, the stick plate preferably surrounds a region of the end cap in which the radial transverse pin projects through the through hole. In this way, the through hole can be protected from contamination and the pin against accidental loss by grasping secured.
- a stick plate can be held within defined limits on the end cap, for example between two extensions on the periphery of the end cap, e.g. by a lower stop on a circumferential thickening and by an upper stop on a paragraph.
- the upper and / or the lower axial portion of the insertion element is preferably formed substantially cylindrical, wherein preferably the upper axial portion of the insertion element has a peripheral structuring, preferably in the form of radial recesses, particularly preferably in the form of axially spaced apart at least partially circumferential radial , For example, annular incisions.
- a peripheral structuring preferably in the form of radial recesses, particularly preferably in the form of axially spaced apart at least partially circumferential radial , For example, annular incisions.
- the Outer diameter of the upper axial portion of the insertion element greater than the outer diameter of the central axial portion and / or as the outer diameter of the lower axial portion of the insertion element. This is the case, in particular, if the lowermost tube section is not designed to be tapered but has a uniform diameter in the lowermost region.
- the insertion element in turn then preferably lies with a shoulder on the upper stop element of the tip body.
- the lower end of the lowermost tube section can also extend to the shoulder of the insertion element or to the lower end of the upper portion of the insertion element, in which case both lower ends rest on the upper stop element.
- the middle and lower portions of the male member preferably project into the central receiving opening of the tip body, which in this embodiment has a smaller diameter than the cavity of the lowermost tubular.
- An alternative preferred embodiment has an upper axial portion of the male member whose diameter is smaller than the lower axial portion of the male member (in this embodiment with a shortened male member, there is no central axial portion) so that the upper portion of the male member inside the bottom tube section is added, and this in turn inside the end cap.
- a step is arranged, which serves as a lower stop for the lower end of the lowermost pipe section, or the lower end of the lowermost pipe section rests on this paragraph.
- the lower axial portion of the insertion element rests against the inner wall of the end cap. In this embodiment, the insertion element is thus completely received in the central receiving opening of the end cap, or does not protrude axially beyond the tip body.
- the lower axial portion of the insertion member has, in embodiments in which such a push-in element is present, a diameter substantially corresponding to the inner diameter of the end cap in the central receiving opening, so that within the end cap, preferably guided via a frictional connection insert member at Influence of an axial force from above the stick body slides axially in the end cap. The sliding is achieved as soon as the acting force exceeds the spring force of the elastomeric spring element.
- the blind hole of the end cap in which slides the insertion element, arranged so that a deflection of the elongated hole is prevented during complete compression of the stick.
- a further preferred embodiment of the proposed stick body may be characterized in that a further damping element is provided in the central receiving opening of the end cap. This damping element dampens the situation where either the lowest pipe section or the insertion element comes into contact with the bottom of the blind hole in the end cap. This prevents that when the elastomeric spring element can not absorb the movement completely or should, there is no hard unsprung stop at the bottom stop.
- This damping element can be inserted as a separate element in the central receiving opening of the end element or fixed therein. It is also possible to attach the damping element at the lower end of the pipe section respectively of the insertion element, or it is also possible to form the lowermost end of the insertion element as such damping element, for example by the insertion element is formed as a two-component component, and the bottom of the Blind hole facing area is formed of an elastomeric material. Another way to make the installation particularly simple, may be to design the additional damping element with a guide pin, which can then be inserted into the typically existing central recess of the lowermost pipe section or the insertion element and secured therein.
- Such a generally circular cylindrical damping element typically has an axial length of 2-7 mm, preferably in the range of 3-5 mm and an outer diameter which is slightly less than or equal to the inner diameter of the central receiving opening in the corresponding area.
- the damping element may be formed of the same materials as the elastomeric spring element.
- a tip body for a stick in particular for a Nordic walking stick, walking stick, ski pole, cross-country pole, or walking stick. This can then be placed in interchangeable manner on the lowest floor pipe section of a stick and attached to it.
- a tip body according to the invention has a downwardly closed end cap with a central receiving opening, for receiving a lowermost tube section of a stick body and / or for receiving a male member having an upper axial portion in the lowermost tubular portion of the pole body and a lower axial portion in the central receiving opening of the end cap is added.
- the tip body further includes an axially surrounding an upper end of the end cap on the outer circumferential, elastic elastomeric spring element, which surrounds the bottom tube portion of the pole body or a central axial portion of the insertion element in the circumferential direction, and an axial relative movement of the lowermost tube portion of the pole body under the action of a dampens axial force.
- the elastomeric spring element is preferably to some extent formed as an elastic ring.
- the tip body preferably has an upper stop member, which is preferably attached to a shoulder at the lowermost tubular portion of the pole body or at the lower end of the upper axial portion of the male member, this as well as the elastomeric spring member circumferentially engages and provides an upper stop for the elastomeric spring element.
- the elastomeric spring element is arranged axially between a lower end disposed at the upper end of the end cap and the upper stop.
- the tip body can therefore be manufactured separately and subsequently mounted on the floor for ease of installation or easy replacement, if a claimed by wear tip suspension must be replaced.
- a claimed by wear tip suspension must be replaced.
- For replacement or subsequent installation on conventional sticks are all, but in particular the third and fourth embodiment, since no kon er bottom pipe section is necessary.
- other shapes or tips variants are conceivable.
- Figure 1 is a schematic representation of a lowermost floor pipe section with a top body mounted from below according to a first preferred embodiment.
- Figure la is a view from the front, and in Figure lb shows an axial section transverse to the direction (Q) of the transverse pin;
- FIG. 2 is a schematic representation of a lowermost barge section with a tip body applied from below according to a second preferred embodiment; wherein in Figure 2a is a view from the front, and in Figure 2b is an axial section transverse to the direction (Q) of the transverse pin shown; and FIG. 2c shows a schematic representation of the insert element used in this second preferred embodiment; and FIG. 2d shows an axial section through the tip body of FIGS. 2a, 2b with its three individual elements, wherein FIG. 2e shows an enlarged view of the circled area Y of FIG. 2d in a view rotated by 90 degrees;
- FIG. 3 is a schematic representation of a lowermost Stocki hrabitess with a bottom-mounted tip body according to a third preferred embodiment
- FIG. 3a shows a view from the front, and in FIG. 3b an axial section transverse to the direction (Q) of the transverse pin
- FIG. 3c shows a schematic representation of the insert element used in this third preferred embodiment
- FIG. 4 is a schematic representation of a lowermost barge section with a tip body applied from below according to a fourth preferred embodiment; wherein in Figure 4a is a front view, and in Figure 4b shows an axial section transverse to the direction (Q) of the transverse pin through the line A-A of Figure 4a; and wherein in Figure 4c is a view from the side (in rotated by 90 degrees view in
- FIG. 4d shows an axial section along the direction (Q) of the transverse pin through the line BB of FIG. 4c; and wherein in Figure 4e is a schematic representation of a alternative embodiment of the attachment of the elastomeric spring element is shown on the upper stop member and the end cap according to a fifth preferred embodiment; and FIG. 4f shows a perspective view of the lowest floor pipe section with a tip body fitted from below according to FIGS. 4a-e, and in FIG
- Figure 4g is an exploded view of Figure 4f additionally shown with a stick plate, and wherein in Figures 4 h and i representations are given for this embodiment with an additional damping element in the central receiving opening of the end member.
- the preferred Ausfubrungsbeispiel shown in Figure 1 shows a structurally very simple variant of a tip suspension.
- the lowest floor pipe section 6 is formed konkon , ie, it has a paragraph 11, wherein the outer diameter d2 of the lowest pipe section 6 above the paragraph 11 is greater than the outer diameter d3 of the lowest pipe section 6 below the paragraph 11.
- This paragraph 11 forms the
- the top body 3 is essentially formed of three main elements, namely seen in the axial direction from bottom to top of the end cap 4, the elastomeric spring element 9 and the upper stop element 10. All major elements have ever a mutually coaxial receiving opening (5a, 5b, 5c) for receiving the lower portion 6a of the lowermost pipe section 6 on.
- the top body 3 thus surrounds so to speak, with its three main elements, the lower portion 6a of the lowermost tube section 6.
- the upper stop element 10 is shown in the sectional view of Figure lb trapezoidal, which is a stopper ring on its periphery a radially upward has inwardly inclined outer surface or flank.
- the lower flat surface of the upper stop element 10 provides an upper stop 10a for the axially below the upper stop element 9 subsequent elastomer spring element 9 ready, and extends in the present embodiment of Figure 1 in the radial direction at an angle of 90 degrees transverse to the longitudinal axis S.
- the inner diameter of the upper stop element 10 corresponds substantially to the outer diameter d3 of the encompassed lower portion 6a of the lowermost bar pipe section 6.
- the upper Stop element 10, and optionally also the elastomeric spring element 9 be attached by means of an adhesive bond on the floor pipe section.
- an adhesive bond on the floor pipe section.
- Alternatively possible is a material bond, a heat transfer (ultrasonic welding or other methods).
- the elastomeric spring element 9 adjoins the surface 10a downwards, which to a certain extent is designed as a hollow cylinder.
- the radial thickness dl of the elastomeric spring element 9 is 0.5-0.7 cm, and the axial length of the elastomeric spring element 9 is 1.5-2 cm.
- the elastomeric spring element 9 on its periphery a circumferential radial recess or an annular, radially inwardly tapered incision 23. It may also be several such recesses 23 axially distributed on the elastomeric spring element 9, which can lead to a kompressionsfreudigen shape, and can also be used to adjust the spring behavior.
- the elastomeric spring element 9 rests on a lower stop 8a, which is provided by the flat surface at the top of the upper end 8 of the end cap 4.
- the upper end 8 of the end cap 4 is to a certain extent designed as an annular flange which projects radially beyond the rest of the end cap 4.
- a first shoulder 25 is formed, which leads into a short region 28 of the end cap 4, which has a smaller outer diameter than the flange or the upper end 8 of the end cap 4.
- This short portion 28 goes to a second Paragraph 26 in an axially below it subsequent further smaller diameter portion 27 which extends axially downwards to a threaded portion 22.
- This threaded portion 22 may serve as a fastener for a as shown in Fig. 4g shown, possibly placed on the end cap 4 respectively screwed with a corresponding internal thread pole plate 24, wherein the stick plate 24 would find an upper stop on the second paragraph 26 described above, or between these two limits would be maintained.
- the threaded portion 22 may be integrally formed on the end cap 4 from the outside or attached thereto or formed integrally with the end cap 4.
- the elastomer spring element 9 is thus, so to speak, clamped between an upper stop 10a and a lower stop 8.
- the elastomeric spring element can additionally be fastened to the abutment surfaces 8a, 10a by means of an adhesive connection; here as well, a cohesive connection, for example a hot-joining (for example ultrasonic welding), is alternatively possible.
- the end cap 4, which is inserted from below over the lower portion 6a of the lowermost tube section 6, has a central receiving opening 5c. In this receiving opening 5 c, which is configured in the illustrated embodiment as a blind hole, the lowermost pipe section 6 is axially displaceable upon the action of an axial force K from above on the stick.
- the wall of the lower portion 6a of the lowermost tube section 6, which has a cavity 20, has a milled or stamped or lasered axial oblong hole 13 at two opposite locations.
- a radial transverse pin 14 is guided in a direction Q transverse to the longitudinal axis S of the stock, which is held at its two ends in two opposite passage openings 1 in the wall of the end cap 4 and extends transversely through the central receiving opening 5c of the end cap 4 therethrough.
- the stick is shown in a rest position, i. there is no force K from above axially on the stick, or no force which is greater than the spring force or prestressed spring force of the elastomer spring element 9. If this spring force is overcome, the elastomeric spring element 9 is compressed between the two stops 8a, 10a, so it bulges radially outward and / or optionally inward, and the axial length L2 of the elastomeric spring element 9 decreases.
- the lower pipe section 6 is moved within the end cap 4 down, and thereby moves the radial cross pin 14, which is in the rest position at the lower stop of the axial slot 13, just before the upper stop position at the upper end of the axial slot 13.
- Die axial movement, ie the damping movement of the stick is thus dependent on the size and the material and thus the spring force of the elastomeric spring element 9 and the path is limited by the depth of the blind hole 5c.
- the axial length of the elongated hole 14 is usefully longer than the possible spring travel, to prevent a knocking out of the elongated hole upon reaching the respective end position.
- the guided in the axial slot 13 radial transverse pin 14 serves during the damping movement or the axial relative movement R of the lowermost pipe section 6 in the end cap 4 at the same time as a guide of the lowermost pipe section 6 within the end cap 4, or as anti-rotation or fixing the rotational position of the two parts relative to each other.
- the lower end 15 of the end cap 4 has a small cavity 29, in which an insert 21 is inserted from below and fixed to the inner wall of the lower end 15 of the end cap 4, for example by gluing or pressing.
- This insert 21 has in the illustrated embodiment of Fig. Lb on a carbide tip 16 inserted from below, which may be pressed or glued.
- the cavity 29 may also be connected to the central receiving opening 5c of the end cap 4, so that the central receiving opening 5 c is designed as a passage opening which extends from the upper end 8 of the end cap 4 to its lower end 15 and which only through the Insert 21 with tip 16 or by a (not shown) attached to the lower end 15 buffer is closed at the bottom.
- FIG 2a a second preferred embodiment is shown.
- the peripheral structuring of the elastomeric spring element 9 is designed somewhat differently, namely with an annular circumferential, radially inwardly tapered recess in the middle of the axial length L2 of the elastomeric spring element 9.
- the lowermost tube section 6 is also formed butted ie it has a heel 11.
- the slot 13 in which the radial transverse pin 14 which is held in the end cap 4, out is.
- the insertion element 7, which is enlarged in Figure 2c and shown individually, is made of aluminum, plastic, other metal, or a combination of these materials.
- the lower portion 7c of the insertion element is cylindrical.
- the upper portion 7a has a peripheral structuring 18 in the form of a toothing in order to increase the frictional engagement between the insertion element and the lowest floor pipe section 6.
- the upper portion 7a projects into the lower portion 6a of the lowermost pipe section 6.
- the insertion element 7 may be glued in addition to its upper portion 7a in the lowermost tube section 6.
- the lower portion 7c abuts with its outer wall on the inner wall of the end cap 4, and is axially displaceable therein, in the case of the application of an axial force K from above on the stick, which exceeds the spring force of the elastomeric spring element 9.
- the insertion element 7 finds its lower stop at the lower end 30 of the blind hole 5c during the damping movement.
- the insertion element 7 is formed shortened, ie without a central portion 7b.
- FIG. 2d the three individual main elements 4, 9, 10 of the tip body 3 detached from each other are shown schematically.
- the trapezoidal shape of the upper stop member 10 can be seen with its upwardly radially inwardly inclined peripheral edge.
- the two abutment surfaces 8a, 10a are substantially parallel to the base at an angle ⁇ of 90 degrees to the pole axis S.
- the trapezoidal shape or the peripheral edge serves for hermetically sealed connection of the arrangement and can be prepared for example by injection molding.
- the tip body 3 has, when assembled, a central receiving opening which is composed by the coaxially arranged individual central receiving openings 5a, 5b, 5c of the upper stop element 10, the elastomeric spring element 9, and the end cap 4.
- the central receiving opening 5 c is configured in all illustrated embodiments as a blind hole, the elastomeric spring element 9 and upper stop element 10, however, as a through hole 5 b and 5 a respectively.
- the through holes 1 are shown enlarged in the two opposite positions of the wall of the end cap 4 with inserted radial cross pin 14, in a view which is rotated by 90 degrees to the view of Figure 2d.
- FIG. 3 a third preferred embodiment is shown.
- the lowermost pipe section 6 is not formed konkon .
- the axial slot 13 is again integrated in a lower portion 7c of a slide-in element 7.
- the lower portion 17 of the lowermost tubular portion 6 terminates above the upper abutment member 10 of the tip body 3.
- FIG. 3c in which the male member 7 of FIG. 3b is enlarged and shown individually, it can be seen that the upper portion 7a of the male element has at its periphery a structuring 18, which are axially spaced apart circumferential annular incisions.
- a circumferential flange 31 is arranged, whose diameter d8 is greater than the outer diameter d4 of the remaining part of the upper portion 7a.
- the lower end 17 of the lowermost pipe section 6 is located when the insertion element 7 is inserted from below into the lowermost pipe section 6.
- the underside of said flange 31 at the lower end 12 of the upper portion 7a of the male member 7 forms the upper stop for the tip body 3, and for the top of the upper stop member 10.
- the middle portion 7b and the lower portion 7c of the insertion member 7 have a smaller outer diameter d5 or d6 than the outer diameter d4 of the upper portion of the insertion element d4, wherein the middle portion 7b and the lower portion 7c in the present embodiment have the same outer diameter d5, d6.
- the insertion element 7 is formed longer than in Figure 2, its total length over all three sections 7a, 7b, 7c is about 3-15, preferably 5-12 and especially 7-10 cm.
- the slot 13 is located approximately in the middle of the smaller diameter portion of the insertion element 7, ie approximately in the middle of the distance between the flange 31 at the lower end 12 of the upper portion 7a and the lower end 32 of the insertion element 7.
- the middle portion 7b forms in this embodiment, the region of the insertion element 7, which is encompassed by the elastomer spring element 9 and the upper stop element 10.
- FIG. 4 shows a fourth preferred exemplary embodiment.
- the difference here is the way in which the elastomer spring element 9 is fastened to the upper stop element 10 and the end cap 4.
- the connection is achieved here by a dovetail connection, in which an axial extension 10b of the upper stop element 10 engages downwards into the elastomeric spring element 9 and in which an upper axial extension 8b at the upper end 8 of the end cap 4 engages upward in the elastomeric spring element 9, so that the respective adjacent elements interlock positively in one another.
- the two extensions 8b, 10b each have a bevelled edge.
- an adhesive bond (or alternative material bond by spraying, welding, etc.) may be provided in addition to the abutting interfaces.
- FIG. 4e shows a fifth preferred embodiment, which is a further alternative manner of fastening the elastomer spring element 9 on the upper stop element 10 and on the end cap 4 in comparison to the fourth embodiment.
- a positive connection is provided, however, the upper axial extension 8b of the end cap 4 and the lower axial extension 10b of the upper stop member 10 has no bevelled edge, but each engages with a smaller-diameter neck portion, followed by a larger diameter flange, which with its surface and its lower surface extends substantially transversely to the longitudinal axis S and parallel to the base, in the elastomeric spring element.
- a good connection of the elastomer spring element results upwards with the upper stop element 10 and downwards with the end cap 4.
- an adhesive bond here as an alternative material connection by welding, spraying, Ultrasonic welding, etc., possible).
- the elastomeric spring element 9 is made of a soft material, and / or in the axial direction an insufficient height (intentional or unwanted), it may happen that the lower end of the insertion member 7 c at a full load on the bottom of the central receiving opening 5 c respectively can hit the revolving level.
- the damping effect ends early, which may be unpleasant and disadvantageous because of the hard impact.
- an additional damping element 34 is arranged in the receiving opening 5c, as shown in Figures 4h and i for the case of the embodiment according to Figure 4.
- this additional damping element is a small circular-cylindrical block of an elastomer material (analogous materials as in the case of the elastomer spring element), which is inserted into the receiving opening 5c or fastened therein.
- the damping element 34 may, as shown in Figure 4h, have a slightly smaller outer diameter than the inner diameter of the receiving opening 5 c, so that the effective damping effect, the elastomeric material of the damping element can escape slightly laterally.
- the corresponding stopper 34 in order to prevent the corresponding stopper 34 from shifting, it can also be fitted with a form fit and / or non-positive fit into the receiving opening either by means of a corresponding configuration such that the outer diameter substantially corresponds to the inner diameter of the receiving opening 5c 5c be pressed in, but it can also be fixed by a material bond (eg glue).
- a material bond eg glue
- the damping element instead of a solid cylinder in the form of a ring of an elastomeric material (for example, simple O-ring), which then rests on the step of the bottom of the blind hole to the cavity 29.
- a solid cylinder in the form of a ring of an elastomeric material (for example, simple O-ring), which then rests on the step of the bottom of the blind hole to the cavity 29.
- a terminating plug can be inserted into the hollow cylindrical tube (not shown) in this lower section 7c ), which provides a full support surface for the top of the damping element 34 and prevents its violation.
- FIG. 4j Another possible construction for such a damping element 34 is shown in FIG. 4j.
- the damping element 34 has an additional guide pin 35 with a slightly smaller outer diameter, which can be positively and / or non-positively and / or materially inserted into the lower opening of the lower portion 7c.
- the insertion element 7 are inserted into the end member 4, and at the end of the damping element 34 is optimally positioned and comes when the damping mechanism is compressed, on the bottom of the blind hole with the shoulder to the cavity 29 in circulation.
- the guide pin 35 then engages in the lowermost pipe section 6.
- FIG. 5c central receiving opening in FIG. 18 peripheral structuring on in FIG. 7a
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Pain & Pain Management (AREA)
- Physical Education & Sports Medicine (AREA)
- Rehabilitation Therapy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Springs (AREA)
- Walking Sticks, Umbrellas, And Fans (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1992015 | 2015-02-13 | ||
CH3642015 | 2015-03-17 | ||
PCT/EP2016/051848 WO2016128229A1 (en) | 2015-02-13 | 2016-01-28 | Pole having a tip spring mechanism |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3256019A1 true EP3256019A1 (en) | 2017-12-20 |
EP3256019B1 EP3256019B1 (en) | 2020-04-15 |
Family
ID=55262804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16701945.4A Active EP3256019B1 (en) | 2015-02-13 | 2016-01-28 | Pole having a tip spring mechanism |
Country Status (9)
Country | Link |
---|---|
US (1) | US10646012B2 (en) |
EP (1) | EP3256019B1 (en) |
JP (1) | JP6917306B2 (en) |
KR (1) | KR102599905B1 (en) |
CN (1) | CN107223028B (en) |
CA (1) | CA2973935C (en) |
HK (1) | HK1243290A1 (en) |
RU (1) | RU2692331C2 (en) |
WO (1) | WO2016128229A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN208161001U (en) * | 2018-04-27 | 2018-11-30 | 厦门富山春工业有限公司 | A kind of ski pole structure |
CA3146342A1 (en) | 2019-07-31 | 2021-02-04 | Elmer Chi Hang Cheng | Illuminated trekking pole |
FR3120502A1 (en) | 2021-03-09 | 2022-09-16 | Decathlon | Stick for sports activity |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2397499A (en) * | 1945-03-17 | 1946-04-02 | Henri C Mcgowan | Crutch tip construction |
US2398534A (en) * | 1945-06-08 | 1946-04-16 | Klausnitzer Frank | Crutch |
US2690188A (en) * | 1949-09-26 | 1954-09-28 | Rochelle E Goddard | Crutch |
US2675014A (en) * | 1952-07-03 | 1954-04-13 | William H Powers | Shock absorbing crutch tip |
US4061347A (en) | 1976-06-01 | 1977-12-06 | Allsop Automatic Inc. | Shock-absorbing ski pole grip |
DE7922100U1 (en) | 1979-08-02 | 1979-11-22 | Riebauer, Eduard, 7000 Stuttgart | RUBBER MIXER FOR CRUTCHES AND CRUKS |
DE3604414A1 (en) | 1986-02-12 | 1987-08-20 | Schilling Ostermeyer Maschinen | SUPPORT FOR FLOORED TOOLS |
WO1988006876A1 (en) | 1987-03-18 | 1988-09-22 | Chol Ho | A nonskid crutch |
IT241871Y1 (en) | 1996-07-26 | 2001-05-17 | Gabel Srl | STRUCTURE OF CUSHIONED WALKING STICK |
US6216713B1 (en) * | 2000-01-07 | 2001-04-17 | Sean A. Kennan | Support device having interchangeable tips |
AT8108U1 (en) | 2004-11-08 | 2006-02-15 | Komperdell Sportartikel Gmbh | STOCK TIP |
DE102005028914A1 (en) | 2005-06-22 | 2007-01-04 | Brückl, Franz | Sports stick, for hiking/skiing and the like, has a ballast weight in the shaft for additional exercise and training of the arm muscles |
US8276943B2 (en) * | 2006-11-18 | 2012-10-02 | Black Diamond Equipment, Ltd. | Systems and methods for pole impact force damping |
JP5289434B2 (en) * | 2007-07-03 | 2013-09-11 | レキスポルト アーゲー | Pole with shock absorber |
GB0717167D0 (en) | 2007-09-04 | 2007-10-17 | Goodwin David M | Walking aids |
WO2010085905A1 (en) | 2009-01-29 | 2010-08-05 | Lekisport Ag | Length-adjustable pole and clamping apparatus therefor |
US20110073146A1 (en) | 2009-09-28 | 2011-03-31 | Stander Inc. | Removable shock absorbing tip for a walking aid |
KR101195834B1 (en) * | 2010-06-30 | 2012-11-05 | 연안알루미늄 주식회사 | Stopper for assemblable walking stick |
CH705790B1 (en) * | 2011-11-21 | 2015-06-15 | Lekisport Ag | Tip attachment for a floor. |
KR101449545B1 (en) * | 2012-12-24 | 2014-10-08 | 김현숙 | A stick grip |
CN203090363U (en) * | 2013-03-04 | 2013-07-31 | 杨立强 | Built-in locking shock-absorbing device of walking stick |
-
2016
- 2016-01-28 CN CN201680010263.8A patent/CN107223028B/en active Active
- 2016-01-28 KR KR1020177023088A patent/KR102599905B1/en active IP Right Grant
- 2016-01-28 RU RU2017129086A patent/RU2692331C2/en active
- 2016-01-28 CA CA2973935A patent/CA2973935C/en active Active
- 2016-01-28 JP JP2017541054A patent/JP6917306B2/en active Active
- 2016-01-28 US US15/545,098 patent/US10646012B2/en active Active
- 2016-01-28 WO PCT/EP2016/051848 patent/WO2016128229A1/en active Application Filing
- 2016-01-28 EP EP16701945.4A patent/EP3256019B1/en active Active
-
2018
- 2018-02-27 HK HK18102808.8A patent/HK1243290A1/en unknown
Also Published As
Publication number | Publication date |
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RU2692331C2 (en) | 2019-06-24 |
US20180008021A1 (en) | 2018-01-11 |
CA2973935C (en) | 2023-07-04 |
KR102599905B1 (en) | 2023-11-07 |
WO2016128229A1 (en) | 2016-08-18 |
EP3256019B1 (en) | 2020-04-15 |
JP2018511357A (en) | 2018-04-26 |
RU2017129086A (en) | 2019-03-13 |
CN107223028A (en) | 2017-09-29 |
JP6917306B2 (en) | 2021-08-11 |
US10646012B2 (en) | 2020-05-12 |
HK1243290A1 (en) | 2018-07-13 |
CN107223028B (en) | 2019-10-18 |
KR20170116053A (en) | 2017-10-18 |
RU2017129086A3 (en) | 2019-04-16 |
CA2973935A1 (en) | 2016-08-18 |
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