CZ180694A3 - Heel for lady's and men's footwear in the form of slightly elevated of block-like or conical wedge heel with a dampening property - Google Patents

Abstract

The figure shows a highly raised heel with a comparatively thin, narrow underside, of the high heel type (22); an inelastic hard core component as a stabilising component (1) with a straight surface (1c) on the inner surface of the closable cover (9) of the one-piece soft flexible envelope (6) which surrounds the core (4) and is made of a layer of elastic material with high inherent damping coefficient as the damping component. When the heel sole is manufactured separately, the envelope has its maximum no-load thickness at the envelope cover (5a). When the heel sole is manufactured as part of the heel, the envelope has its maximum no-load thickness at the sole (5). The envelope is parallel (21) to the outer faces of the core and extends round all sides of the heel. The heel is attached to the surface (2) of the cover and the outer, higher envelope external wall -- compared to the core height -- by securing the upper surface (22) by a screw, nailing in the hard core (3), the screw being given stability by a hard plastic ring (10). The soft outer envelope is placed or applied by extrusion loosely with no attachment to all the inner envelope walls and is higher than the inelastic core (7a in the no-load state).

Description

Heel for women's and men's shoes in the form of fashionable block or conical wedge heel with cushioning treatment

PV48O6-94

CURRENT TEXT

JUDrTj. TRAPLOVA LetAKliscKi Attorneys at Law and Patent KaNCELAA 17000 Praha 7, U průhonu 33

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a shoe heel which is fashionably raised and is in the form of a block or conical wedge heel, closed up and down, in which a hard, inflexible, inflexible solid or hollow core piece of wood or hard plastic forming a stabilizing element is the heel part is provided with an outer sheath of elastomeric material constituting the damping element according to DE-GM 9201.1, DE-PS 42 19 152.1-26, PCT / DE 92/00563, DE-GM 92 09 230.6, DE-GM 92 13 302.9, PCT / DE 92/00845.

BACKGROUND OF THE INVENTION

DE-OS 29 33 393 describes a shoe sole with a flat, wide and low heel, which is provided with a cushioning treatment for cushioning or rebounding, wherein the heel accommodates an elastomeric core with a high inherent cushioning capability and the heel is further provided a resilient outer shell closed downwardly and made entirely of resiliently flexible plastic or rubber material as a damping element.

The outer heel wall forms a resilient element, while a core of high self-damping foam or plastic is placed in the inner cavity of the heel as a damping element. In this case, the outer sheath forms a spring element and the core is a damping element which is flexible to the same extent as the outer spring element and in the unloaded state both elements have the same height because both the outer sheath and the core compress under equal force. This solution allows the outer shell to compress under load to the heel core. For sports shoes with a wide flat bottom, this is achieved by optimizing the formation of a double rebound damping, which can save body energy and extremely relieve the rebound joints. For heels with higher heels, the free heel end of which is tapered, no lateral stability is provided when the heels are provided with a core of elastomeric material as the rebound forces can break both heel parts, i.e. the soft core and the soft jacket, sideways. The height of the elastomeric core is equal to the height of the elastomeric outer shell. In this case, the leg is not guided by a rebound or step.

DE-OS 29 08 023 discloses a fashionable heel which is composed of various wedge parts. The conical interlayers are formed of a resilient material that is attached to the upper and lower bearing surfaces and has approximately the same thickness throughout the heel cross section. In the present invention, it is intended to provide a shoe heel design that provides sufficient elastic capability, while at the same time maintaining the possibility of horizontal displacement of the lower portion of the heel within narrow limits. According to the document, this object is to be achieved in that both bearing surfaces have first and second sections in the areas above one another, the first extending downwardly in the walking direction and the second extending also diagonally, but in the reverse sense. Since the heel of this embodiment consists of several parts, these parts are subjected to repeatedly squeezing and releasing while walking, and there is movement between them and considerable friction, and there are problems with the durability of the embodiment when using the shoe with this heel. it is not possible to implement the solution for all shapes of fashionable heels, because in this case too the price factor has to be taken into account.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to improve the known heel designs to such an extent that it is relatively simple to provide a heel with a high heel height and a relatively small foot area with sufficient heel stability and good foot guidance while achieving a certain cushioning effect. It is also an object of the present invention to find such materials which, by virtue of their composition and the spatial arrangement of the heel portions, provide for further improvement and even better technical performance of the heel of the invention in design and manufacture while achieving very advantageous manufacturing costs.

SUMMARY OF THE INVENTION

This object is achieved by a heel according to the invention, the construction of which is based on the known embodiment, essentially consisting of heels with an elevated conical wedge-shaped preamble of claim 1 and whose characterizing parts of claim 1 in height having the shape of a block or heel. on the wear side, and at the top it is closed and consists of a hard core as a stabilizing element and a one-piece resiliently flexible outer shell of flexible plastic or a rubber material as a damping element. Further specific embodiments of the invention are set forth in the subclaims.

In the solution according to the invention, the heel stability is achieved by using an inelastic hard core, and the cushioning of the foot or rebound is achieved by a one-piece outer sheath of soft elastic and flexible rubber material.

The basic advantage of the shoe heel solution according to the invention consists in finding suitable material components for the stabilizer element and the heel cushioning element, wherein the composition of the materials of the individual heel elements and their spatial interposition contribute to the advantage of the heel.

Advantageous effects are achieved in that, according to the invention, the raised heel, having the shape of a block or conical wedge heel, consists of two different materials, namely a hard, inflexible and inflexible core piece of lightweight solid or hollow wood or hard plastic, which forms the heel stabilizing element. , and a resilient elastic outer shell of resilient, rubber-like flexible material whose hardness, expressed in Shore hardness units, can vary and serves as a damping element surrounding the hard core on at least three sides, namely the peripheral region and the tread side (FIG. 13) or from all sides (Fig. 3). The heel is closed at the top and bottom and is made in different heights and widths. The outer sheath is made entirely of, for example, polyurethane, thermoplastic rubber or other soft plastic materials which may differ from each other in terms of their Hardness Units, so that the heel comprises a vertical part resiliently compressible in the direction of its longitudinal axis which resiliently absorbs impact. that is, in the unloaded state, higher than the inelastic core. The damping effect thus obtained is that, at the moment of first contact of the shoe with the ground, when the foot is pressed down, both the heel wafer edge region and the heel wafer portion of the outer shell contribute to the elastic damping by their elastic deformation.

The soft outer shell has a different shape according to the outer shape of the core on which the outer shell abuts on the underside, the upper side and the side walls, and this is where it has its greatest thickness. The heel of the invention may have different heights, widths, depths and outer shapes. The heel plate may be made by injection molding integral with the outer shell walls or may be made separately for retrofitting, or may be formed as a spare part with normal height or special height to compensate for unequal bone lengths of the user's legs. The heel wafer is made of the same material as the outer shell and is provided with at least one hard plastic fastening pin that can be inserted into the preformed blind holes in the bottom surface of the core when replacing the replacement wafer. The inelastic core and the soft outer sheath are precisely matched to each other on their contact surfaces, and the core shape corresponds essentially to the shape of the outer sheath, in particular in relation to the wall thicknesses thereof. The outer walls determine the shape of the preformed mold for performing the injection molding process.

By altering the shape of the core part on its upper surface and its upper peripheral edge, i.e. by selecting a rounded edge or a sharp or straight edge of the upper surface, forming the entire upper surface in a planar shape, or providing the edges of the upper surface with chamfered edges in the first case, the outer heel sheath may be removed from the core after the heel has been separated from the shoe upper, wherein the outer sheath flange having a shape adapted to the shape of the edge grip or the core step may be removed from the rebate with rounded, triangular sharp or straight cross section; in the latter case, the removal of the outer heel shell is made possible by a snap-fit between the chamfered peripheral edge of the core and the correspondingly shaped outer skirt without the need to release the entire heel from the shoe upper. The heel sheath is firmly attached to the upper when the shoe is mounted. The threading of the heel sheath onto the core may be carried out in a single operation, or the core may be deposited in the injection mold for producing the outer heel sheath prior to the start of the injection molding process. There is no rigid connection between the core and the outer shell, and the heel is fastened to the upper of the shoe by screwing, gluing or nailing, or by pressing pins and nails or by other fasteners. In this case, the heel adjoins the upper of the shoe on the upper side with the upper surface of the core and the raised side edges of the outer shell.

If the heel is provided with a closed cover or a closable cover closed by engagement of the click ribs and grooves, the core part has its entire upper surface flat or slightly curved, the heel to upper connection being realized by the upper cover and the side walls of the heel outer shell. . The connection of the heel core to its outer shell may be loose or rigid, depending on the type and use of the heel. The insertion of the outer sheath onto the heel core may be carried out in a separate manufacturing operation or the core may be placed in the injection mold before the injection begins. Fastening to the upper of the shoe is done by screwing or nailing through the soft top cover into the hard core part. In order to ensure sufficient stability of the connecting bolts, metal rings or hard plastic rings mounted in respective recesses in the lid are mounted around their heads. The outer casing cover is glued or loosely supported on the core member. The outer casing with the lid is loosely mounted on all inner walls, without connection to the core, or in the case of a firm bonding of the cover to the upper surface of the core, it is formed on its lateral inner surfaces and on the lower surface without fixed connection with the core.

If the heel is formed without circumferential gripping grooves or steps and an upper shell of the outer shell, the soft outer shell is rigidly connected to the hard inner core. The heel formed in this way is then connected to the upper of the shoe also by means of screws and nails. The heel closure is in this case formed by a core and slightly raised edges of the side walls adjacent the upper of the shoe.

According to another advantageous embodiment of the invention, they are provided with conical grooves on the external viewing surfaces or are smooth and without grooves, depending on the use of the heel. By providing the outer casing with grooves and providing the heel with the top cover, the cushioning effect is increased compared to the design without the peripheral grooves and the soft top cover, since the heel can be squeezed when the heel is pressed down. The heel outer shell is higher than the hard core in all unladen construction variants.

In an alternative embodiment of the heel in which the outer shell is provided with an upper skirt and the heel is not provided with a cover on the upper side, the outer shell may also be joined on its side walls of the outer shell to the core or cover, the outer shell being rigidly attached to the outer surface. kernels; the type of this embodiment is dependent on the use of the heel.

In another variant of the preferred embodiment, the heel described above is provided with an outer shell integral with the hard inner core which is provided not only with pre-formed holes for fastening screws to attach the upper side to the shoe upper, but also with pre-formed holes on the bottom surface of the core. are used in heel repair for attaching replacement heel plates. During repair, the lower part of the peripheral shell, which is integral with the core, is cut off at a thickness corresponding to the height of the heel wafer and a new heel wafer made of the same material as the outer shell and provided with hard plastic fastening pins is fastened into the pre-formed holes. wherein the replacement heel plate may have a normal height or a special height when used for orthopedic shoes.

The heel according to the invention can also be produced by spraying the outer sheath onto the core so that a thin layer of the outer sheath mass is formed on the bottom surface of the core and the heel plate is fixed as a separate piece. In this case, the heel plate is also made of the same material as the outer shell and is provided with hard plastic fastening pins which are fastened in the heel itself. After fastening the heel plates, the rigid fastening pins are surrounded by the foamed mass of the outer shell or inserted into the injection mold before the injection molding process.

The fashionable appearance of the outer shell of the heel is achieved by coloring the outer shell material or by attaching additional materials to the outer side surfaces of the heel.

The heel of the invention may be formed as a separate piece or may be integrally formed with the sole as a one-piece unit. The sole may be made of the same material as the heel or another material may be used.

The hard core may have three basic shape variants: on the one hand, it may have a parallel conical taper towards the bottom surface running parallel to the tapering of the outer side walls of the elastic outer sheath from their upper regions; and, in the third case, it may have a concave constriction, extending on the underside into a convex extension. In all three heel designs, the height of the core portion can be shifted up or down to the bottom or top surface, depending on the type of heel being used.

By inserting the core into the injection mold before starting the injection process, it is achieved that the shrinkage points on the finished heel are removed, which could easily occur when injecting the separate outer shells. The outer upper part of the outer wall of the shell or lid is firmly clamped when the heel is mounted.

These measures ensure that wearing this elegant shoe with a raised slim heel reduces the load on the intervertebral discs, hips and joints, as well as high energy savings on walking, which is a great benefit for maintaining health and performance.

The outer sheath of the heel is removable when loosely placed on the core or is firmly attached to the core when it is attached to the core. Repairing a damaged heel can be accomplished by replacing the heel wafer with a new one or by replacing the entire outer shell. In the heel of the invention, its height can be easily adjusted, for example, to the difference in bone length of both legs by selecting a suitable heel waist height. Due to its extremely simple manufacture and the fact that, due to their wide variability, the production cost of the heel is very low, the heel according to the invention can be used for all price groups of footwear.

BRIEF DESCRIPTION OF THE DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a vertical longitudinal section of a releasable high heel with a rounded step on a core piece and an outer skirt with a skirt; FIG. 2 a vertical cross-section of a releasable heel with a hollow core part having a straight 3 shows a longitudinal section through a block heel with a flat top surface of the core and a fixed top cover, the core being surrounded on all sides by a layer of elastic material; FIG. 4 a vertical cross section of a hollow-heeled heel Fig. 5 a vertical longitudinal section through a block heel with a flat upper surface of a massive inner core without an upper cover, the core part of which is rigidly connected to the lateral 6 shows a vertical longitudinal section through a heel block with a core part provided with a hook edge step, with a skirt and a convex taper at the bottom of the core part; FIG. 7 a vertical longitudinal section through a heel comprising a core part with a flat upper surface and an outer Fig. 8 is a vertical longitudinal section of a heel with a massive core piece and an outer shell provided with a rim adapted to the shape of the edge of the core piece and adapted to be snap-fit to the core without detaching the heel from the upper of the footwear; 10 shows a vertical longitudinal section of a heel with a removable heel plate having a normal or special height; FIG. 11 a vertical longitudinal section of a heel; Fig. 12 a side view of a heel with slots in the outer surface, Fig. 13 a side view of a heel with a smooth outer surface without the slots, Fig. 14 a vertical longitudinal section of a heel with inner core running up to Fig. 15 is a vertical longitudinal section of a heel with a core having a flat top surface and a closable cover for a removable outer shell; Fig. 16 is a vertical longitudinal section of a heel, molded in one piece with a sole having a core at the upper edges. 17 shows a vertical longitudinal section of a removable wedge heel, molded in one piece with a sole and having a core with a straight upper surface and an outer shell with a cover, FIG. with a wedge removable heel with circumferential steps for engaging the outer edges of the removable outer heel shell.

DETAILED DESCRIPTION OF THE INVENTION

In the drawings, the heel 7 of the shoe, which is closed at the top and bottom, is provided with a rigid rigid and rigid core part 1 as a stabilizer, which may be a solid core part 12 or a hollow core part 12a of hard plastic or wood and which may have various the shape of the top surface and the outwardly rounded graduation 1a <X 16, the sharp hook 1b or the straight edge 16a, the planar top surface 1c. the aligned outer edges ld 16b or the lower surface, which may have a parallel conical taper 21, the actual conical taper 21a. a concave constriction 21b with a convex extension, with a height offset relative to the lower and upper surfaces 15 ^ 15a, which is surrounded on all sides by at least three sides, i.e. on the circumference and on the tread, with a thick layer 4 of elastomeric material, which forms the outer sheath as a damping element 6 which, in the unloaded state, is higher than the inelastic core 7a, which is the corresponding element to the hard core part 1, the outer sheath 6 having the largest width on the bottom 5, top 5a or side 5c and is loosely slid onto the core 7a or is loosely inserted between all outer walls of the sheath without being connected to the core as at 6a, or the core is rigidly connected to all the lateral inner walls of the outer sheath at 8, or wherein a rigid connection 8a of the surface of the core is formed only by st the inner wall of the upper casing without forming a connection with the side walls and the bottom wall of the core having a closable casing 9 or a closed casing 9a with a fastening ring around the screws 3 10, wherein a flange is formed at the upper edge of the side walls i.e. a rounded skirt 16, a sharp or straight skirt 16a. the latching connection 16b. The outer surface of the outer shell may be a smooth surface 14 or a knurled surface 11, and the separate heel plate 17a, which is a replaceable part, may be formed with a normal height 18 or an extraordinary height 18a. The outer shell 6 may be formed integrally with the heel wafer in a single injection operation and with pre-drilled holes in the lower core and the upper core, or the heel 20 may be formed integrally with the sole. In another example, the heel n is fastened to the upper side 2a by means of screws, nails or by gluing 3, or push pins and nails 13 to the upper of the shoe, upper on the upper with upper core surface 2 and upper side walls 2a = 3b and provided with a comparable thin and narrow lower surface with the shape of a high heel or tapered heel 22. The outer upper portions of the walls of the cladding or upper cover portion are tightly clamped 3d during assembly.

Claims (7)

1. A heel cushioning shoe with a core and one-piece, downwardly, and thus to the tread, a closed and resiliently deformable outer shell made of a resilient plastic or rubber material as a cushioning element, characterized in that it is closed at the top and bottom (7). 1), its core (1) is rigid, rigid and hard, and the one-piece, flexible and flexible outer shell (6) is unloaded higher than the hard core (7a) and is a stabilizing element. The heel according to claim 1, characterized in that the heel of a block or conical wedge shape raised to a greater height is provided with a relatively small and narrow bottom surface (22). Heel according to claim 1 or 2, characterized in that the hard core (1) of hard plastic or wood is a solid core (12) or a hollow core (12a) and corresponds in shape to the shape of the outer shell (6) taking into account its wall thicknesses (5, 5a, 5b, 5c) and on its upper surface and the peripheral edge is differently shaped, in particular it is provided with a rounded step (1a, 16), a sharp or straight hook (1b, 16a) on its peripheral edge; (1c) is entirely planar or the outer edges are chamfered (ld, 16b), having a different shape towards the bottom surface, in particular having a parallel taper (21), a taper (21a) itself, a concave taper (21b) with a convex extension and a height displacement (15, 15a) towards the bottom surface or the top surface of the core (1). The heel according to at least one of claims 1 to 3, characterized in that the core (1) is on all sides (Fig. 3) or at least on three sides, namely in the peripheral region and on the tread (Fig. 13). surrounded - externally, a layer of elastomeric material (4) forming the outer sheath (6) which, in the unloaded state, is higher than the inelastic core (7a) corresponding to the hard core (1), the outer sheath having the largest wall thickness on the underside (5); on the upper side (5a) or on the side (5b) and is loosely mounted on the core (1) or rests freely on the core (1) with all of its inner walls without direct connection to the core (6a); with all the lateral inner walls of the outer casing (8) or the core being rigidly connected to the inner wall of the casing only on its upper surface, without joining the lateral surfaces or the lower surface of the core (8a), the outer casing having a closable casing (9); closed cover (9a) with fastening rings around the screws (3, 10), on the upper edge of the side walls is formed a flange corresponding to of the core of the core, in particular having a rounded shape (16), is sharp or straight (16a), optionally forming part of a snap-fit (16b), the outer surfaces of the outer shell are provided with concave recessed grooves (14) or smooth (14) and outer walls the casing or cover is firmly clamped when installing the heel (3d). Heel according to at least one of Claims 1 to 4, characterized in that its separate heel plate (17a) and its spare part are made with a normal height (18) and a special height (18a) of soft material as an outer shell and is provided with at least one hard plastic fastening pin for fastening to the core, or the heel plate is sprayed in a single injection operation (17) together with the lower outer wall of the outer shell (6). Heel according to at least one of Claims 1 to 5, characterized in that it is manufactured either as a separate part (19) or in the form of a sole unit with a heel (20), the fastening on its upper side (2a) being This can be done by screwing, nailing, gluing (3) to the shoe upper or the hollow core heel (12a) can be fastened with rivets (13). Heel according to at least one of claims 1 to 6, characterized in that the upper closure of the heel with respect to the upper consists either of the upper surface of the core (2) and of the upper parts of the side walls of the outer shell (2a) (= 3a). , 3b) or the housing cover (2, 9, 9a) and the side walls of the outer housing (2a) = (3b).