KR0147304B1 - Gus adjustable shoes - Google Patents

Abstract

Footwear with the secret means of gus control has been described. The gus adjuster constitutes a guss adjustable lining assembly which is either hand or automatic and arranged in the shoe.

Description

Shoes with adjustable girth

1 is a side cross-sectional view of a shoe according to the present invention.

2 is a cross-sectional view of the shoe shown in FIG. 1, taken along line 2-2 of FIG. 1 when no shoes are worn.

FIG. 3 shows the embodiment of FIG. 2 when shoes are worn so that some weight is applied.

4 is a side cross-sectional view of a shoe according to another embodiment of the present invention.

5 is a cross-sectional view of the shoe shown in FIG. 4, taken along line 5-5 of FIG. 4 when no shoes are worn.

FIG. 6 shows the embodiment shown in FIG. 5 when some weight is applied by wearing shoes.

7 is a side cross-sectional view of another type of shoe in accordance with the principles of the present invention.

8 is a side cross-sectional view of a shoe according to another embodiment of the present invention.

9 is a cross-sectional view of the shoe shown in FIG. 8 taken along line 9-9 of FIG. 8 without shoes.

FIG. 10 is a cross-sectional view of the shoe shown in FIG. 8 along line 10-10 of FIG. 8 when some weight is applied to the shoe.

FIG. 11 is a plan view of the insole assembly shown in FIG. 9, including a transversely deformable frame, an insole and an insole cover, and means for adjustable widthwise to deform the frame.

12 is a side cross-sectional view of yet another form of shoe having a deformable frame in accordance with the principles of the present invention.

FIG. 13 is a cut plan view of the shoe insole assembly shown in FIG. 12. FIG.

14 is a side cross-sectional view of a shoe according to another preferred embodiment of the present invention.

FIG. 15 is a cross-sectional view of the shoe shown in FIG. 14 along line 15-15 of FIG. 14 when the foot has a narrow circumference in the gus area controlled by the shoe according to the present invention.

FIG. 16 is a cross sectional view of the shoe shown in FIG. 14 taken along line 16-16 of FIG. 14 when occupying the widest circumference in the girth region controlled by the shoe according to the invention.

* Explanation of symbols for main parts of the drawings

20: shoes 22: upper

24: upper 28: seam

30: tap 43: instep

44: insole 48: inner assembly

45: ball 50, 54: insole lining

58: permanent fixed insole

In order for a shoe to fit properly, not only the length must be correct, but the inner width and circumferential dimensions must be correct, which must always match the foot dimensions.

As used herein, a girth is defined as the transverse circumferential length of the circumference of the foot measured at the ball, the waist of the foot and the instep, to effectively describe the inner circumference of the shoe in the same area. Also used.

Conventionally, the shoe is fitted to the foot by providing more than nine widths for each length size. However, despite dimming the various widths as described above, between the left and right foot circumferences, as well as the circumferential change caused by daytime activity and mainly a change in width of about 1.5-2 size due to the liquid accumulation of the foot. There is a need for another gauze control means to offset the difference. Although this information is well known, there has been only one width for each length size for mass production and economic distribution, which can cause severe foot disease over long periods of time, as it fits roughly or hardly in most cases. do.

For this reason, there is a need for a practical and economical shoe that can be adjusted in width and circumference by means of invisible, hidden means for application to a variety of shoes, including footwear having attachments at the bottom and top according to the prior art. It has been on the rise.

Shoes with adjustable circumference are not new. Most prior arts have used visible means, including laces, laces, etc., but according to the means, circumferential adjustment can hardly be made in the ball of the foot where adjustment is most needed. Moreover, the means do not exist in styles without girth adjustment means, such as loafers, women's dress shoes of varying heel height, many casual shoes and boots; In addition, there has been a continuing need for shoes with automatic gauze control means to prevent inadequate adjustment by hand and for those who are difficult to control by hand, such as children, the disabled and the elderly.

US Pat. Nos. 3,404,468, 3,541,708 and 3,686,777 to the inventors disclose shoes of adjustable 9irth construction. This all proved to be unmarketable for a variety of reasons; The patents 3,541,708 and 3,686,777 are too complex to be competitive in production, and are prone to malfunctions when dust is trapped within the mechanism, and 3,404,468 are not only inferior in appearance and durability as compared to conventional shoes, and have similar problems as described above. However, it does not perform enough gus adjustments to consider. However, in spite of many of the above problems, the patents suggest advantages that make up the invention.

According to the shoes disclosed in U.S. Patent Nos. 3,442,031 and 3,922,800, the gauze is adjustable by raising a portion of the upper surface of the insole, which not only changes the girth of the shoe but also raises the foot located inside the shoe. As a practical matter, in order to fit comfortably on the heel leather and the back of the shoe, the adjustment is usually done at the front of the shoe, so that the relationship between the effective `` ground '' of the shoe, ie the height of the heel and the height of the ball An imbalance control action can be made that can change. Moreover, since proper girth adjustment usually reflects the girth difference between the left and right feet, both feet are positioned at different heights with respect to the walking surface, which can cause serious orthopedic problems when worn for long periods of time. .

US Patent No. 490,998, which has some similarities to the present invention but differs significantly in function; 2,691,227 and 3,436,842, the girth adjustment action is possible only when the load is not applied to the shoe, the present invention is able to adjust the girth both when the load is applied or when the load is not applied. The present invention deals with the trauma and discomfort caused by the shoe does not fit well when worn. Further, patents 2,691,227 and 3,436,842 show no means of preventing dust and stones from getting stuck in the described structure.

U. S. Patent No. 3,693, 270 uses a sponge that is fixed and deformable inside the boot so that the foot can be easily retracted without the use of zippers or other means of extension. However, when the foot is put on, the heat and pressure increase and the ball part is worn, so it cannot be used in conventional dress shoes and casual shoes.

US Pat. No. 4,736,531 describes a shoe that has no upper attachment and has a slipper insole secured to the bottom assembly and partially resilient surrounding the front of the foot. While this structure can limit misalignment of the front leather of the shoe when in use, the narrower foot in the shoe feels loose and bends when a heavy walking weight is applied to the sensitive upper surface of the shoe ball. buckling occurs, so it's hard to say that Gus actually works.

U.S. Patent No. 4,038,762 uses a viscous fluid material in the finish for use in alpine ski boots with a hard insole, which usually bends the MP (vertebrae / talus) joints while walking on foot, while It is not applicable to conventional shoes that require optimal gauze adjustment. This method, and similar approaches using air, gel, gas, plastic blowing agents and other mechanical means, are particularly useful for shoes with tight insoles when used at the rear of the ball, but are comfortable for relatively sensitive and critical fit areas. Use on the cheeks for overfoot health has been ruled out.

It is an object of the present invention to provide a shoe structure which includes invisible girth adjustable means which can be used in shoes of various styles, including shoes having conventional bottom elements.

The shoe according to the invention consists of a deformable upper, inelastically fixed to the insole and a bottom adjuster of the upper and girth adjustmenmt means arranged in a cavity formed by the upper and insole elements. do. The gauze adjusting means is preferably in the form of a liner located therein. The liner is attached to the inner top of the upper and is able to adjust the girth of the shoe to fit the foot circumference and includes an elastic device that deforms the side of the upper to make this adjustment. do. In a preferred embodiment, the deformation of the upper part along with the adjusting action occurs when the shoe is loaded, in particular when the shoe is in motion.

In one embodiment, the inner assembly has an insole floating between the foot and the panel, attached to the plate of stretchable material under the foot, and includes an inelastic lining positioned around the side of the foot.

In another embodiment, the stretchable material is disposed along the side of the shoe and the non-stretchable material constitutes a bottom panel so that the functions of the inner assembly are essentially reversed.

In another embodiment, not shown in the figures, the flexible liner extends under the sole and along the foot side. The structure is particularly suitable for shoes of the so-called 'tubular' structure.

In another embodiment, the gauze adjustment means comprises an inner assembly having a relatively inelastic bottom panel and an inelastic top liner element attached to the insole element, wherein the bottom panel And insole elements are preferably attached to the transversely adjustable frame assembly.

The frame assemblies are interconnected by hinged joints and are attached to various adjusting means including springs, other elastic materials, cables, cams, and the like. Lateral motion in the frame assembly allows rotational adjustments to the lateral edges of the liner elements, resulting in a change in the effective girth dimension of the liner located therein.

In this embodiment, the insole portion of the unloaded inner assembly is partially suspended in the shoe and the upper deforms only when a load is applied to the shoe. In all other cases, the upper will retain its original shape, regardless of the foot girth inside the shoe.

In another embodiment, the invisible gus adjustment means, in particular for inexpensive shoes, constitutes the lining element, is located inside and is elastic when the adjustment action along the girth is adapted to the shape and dimensions of the foot. It consists of a flexible lining element that is partly attached directly to the upper to have a different shape compared to the shape of the adjustable surface. The above embodiment preferably uses the upper and lining elements on the floor elements along the edge edges of adjacent floor elements together with simple and conventional attachment means.

DETAILED DESCRIPTION In order to fully understand the object and nature of the present invention, reference should be made to the following detailed description of the accompanying drawings.

Referring to the drawings, the adjustable girth shoe structure of the present invention will be described with reference to a well-known loafer form. However, this is merely an example for easy reference and it should be understood that the present invention is not limited to any one type of shoe and can be applied to most other types of footwear, including other types of shoes, boots, sneakers and slippers. do. In various embodiments described below, the same reference numerals refer to parts having the same function.

1, 2 and 3 show one embodiment according to the present invention. The shoe 20 includes a front upper 24 and a plug 26 connected together by suitable means, such as stitching, such that the seam 28 extends around the front of the shoe and is flexible It consists of an upper portion 22. The upper part of the shoe is preferably made of leather. The back of the shoe has a tab 30 covering the upper 24, a cuff 32 stitched to cover the upper edge adjacent the tab 30, a top 22 and a liner 46. . The shoe 20 also has a sole assembly 34 according to the prior art with a heel 42, an instep 43, a waist 49, a ball 45, a toe 47. Include. In this embodiment, the sole assembly 34 is cut from a so-called blocker and the upper surface of the sole unique 36 by means of a sole unit 36 of rubber material, adhesive or other suitable attachment means according to the prior art. It consists of a midsole 38 of rubber material attached to the bottom surface, which is connected to the upper by sewing to the bottom portion of the upper 24 along the perimeter of the midsole. The shoe 20 also includes an adjustable inner assembly 48 that is composed of a liner 46 and an insole lining 50.

In this embodiment, the liner 46 is comprised of non-woven nylon fabric, Cambrelle® non-stretch material produced by Paytex Corp. of Braintree, Mass., But other suitable non- Elastic materials can be used.

The liner 46 is a liner, except for the end position of the heel that secures the tab 30, upper and lower portions of the upper 24 and optionally includes a liner 46 in the seam 31 sewn by hand. It is attached to the upper 24 edge at the top edge of the liner, and the liner 46 is not attached to the upper 24 at a position other than the top edge. The insole lining 50 having elasticity is fixed by stitching to the lining 46 at the bottom surface, and the liner 46 and the insole lining 50 form an inner assembly 48 surrounding the sides and the bottom of the foot. Form. Insole lining 50 is made of a stretchable knit in a form known as spandex and other suitable plate materials with other elasticities may be used. Insole 44 rests loosely over the edge of liner 46 and the lower edge of insole lining 50. This prevents excessive seam connections of insole lining 50 and liner 46 and prevents the foot from feeling sewn seams. The insole 44 extends the length of the interior of the shoe and is shaped to match the bottom of the bone that the shoe is made of, the last of the maximum width that the shoe can accommodate. Further, the insole 44 is not attached to the inner assembly 48 and is easily removable for removing and cleaning foreign matter that builds up inside the shoe.

2 shows the shoe 20 in which the insole lining 50 is not stressed so that the insole 44 is suspended. In this state, the width of the insole lining 50 is kept to a minimum, so that the bottom edge of the liner 46 and the insole lining 50 are supported as close as possible. In the absence of stress, the contour of the upper portion 22 is maintained as it is when it is placed on the bone during shoe manufacture. On the other hand, when the foot is put into the shoe and subjected to a load as shown in FIG. 3, the insole lining 50 is stretched so that the liner 46 fits the foot, in particular between them, including the ball, waist, and instep. It will fit snugly with the feet in the area.

The inner assembly 48 expands to fit the girth of the foot, thus playing an important role in ensuring that the foot fits in the shoe. Moreover, the side of the upper portion 22 expands and deforms slightly outward as the inner assembly 48 and the insole 44 move downward due to foot pressure when the shoe is loaded as shown in FIG. Is limited to the maximum girth the shoe can accommodate in relation to the girth of the foot.

4, 5, 6 and 7 show the first and second degrees, except that the elastic material essentially surrounds the side of the foot and, optionally, the upper part of the foot, and the non-elastic material is placed under the foot, essentially inversely working. An embodiment similar to that shown in Figure 3 is shown.

4 shows moccasinization consisting of a top 22 having an inner assembly 56 and extending over a permanent fixation insole 58 according to Texon ^R or the prior art, the inner assembly 56 being stitched ( consisting of a liner 51 of spandex or similar material attached to the inelastic insole lining 54 by stitching, wherein the insole lining 54 is a Cambrelle ^R or similar elastic material and supports the insole 44. do. 4, 5 and 6 show an embodiment having a moccasinized structure, wherein the seam 28 is heat formd on a portion of the upper 22 that includes the plug 26. The construction of seams or pleats of the structure can be performed with equipment supplied by Geo. Knight Co. of Brockton, Massachusetts, or another company. As best shown in FIGS. 4 and 5, the seam 28 is sewn to the liner 51 in an essentially unstretched and unstretched state. 6 shows a seam 28 and a liner 51 that are sewn in an expanded state, such as a load with a relatively wide foot in the shoe. Top 22 is deformed along the expanded seam 28 and the sides formed in top 22 as in FIG. 3. 5 shows a shoe with the foot removed, with the inner assembly 56 in an untensioned or minimally tensioned state. To adjust the girth only, the seam can be used with an internal assembly that can adjust the girth, or can be omitted as shown in FIG. 7, wherein the girth adjustment action is made by the elasticity of the upper and liner, together with the upper side deformation. Should understand.

8, 9, 10 and 11 show another embodiment of the present invention.

In this embodiment, the inner assembly consists of a liner 46, an insole lining 50, and a frame assembly 60. 8 is a side view of a shoe, wherein an inelastic Cambrelle ^R is used for the liner 46 and the insole lining 50, wherein the insole lining 50 is an inelastic insole 62 and a filler block 68. Is supported by, and the upper portion 22 extends over the permanent fixation insole 70 of the prior art. As best seen in FIG. 11, the frame assembly 60 forms the base of the gauze adjustment means and comprises a frame 61 of articulation. Frame 61 is made of a suitable material, such as plastic, has a thickness of about 0.03 inches to about 0.04 inches, is made of injection molded polypropylene, and a notch 69 is constructed to act as a hinge. The narrow connection is such that the frame 61 can be deformed or twisted in the transverse direction with respect to the tensile force by the stainless steel spring 72 attached to the frame 61 by the clamps 70, 71. do. Optionally, the connection can be omitted, and the frame can be composed of segments with spaces, or the size of the connection is reduced or the number of connections is limited. The spring 72 is selectively attached to the filling block 68 and the insole 62 at the central position by the clamp 74 to keep the frame deformation in the transverse direction balanced. The insole lining 50 has an edge extending along its circumference, which is superimposed on the underlying frame 61 and connected at the bottom by suitable means such as adhesive or radial coupling means. The upper part 22 is then placed over the last, and the insole lining 50 is attached to the frame assembly 60 while the jig temporarily fixes the frame 61 at the outermost position of the frame. The liner 46 is extended by the adhesive to the bottom of the insole lining 50 so that the jig is removed. As shown in the figure, the liner 46 is attached to the top 22 by any suitable means, such as an adhesive or a sewing operation. The top 22 is then supported on the insole 70 in accordance with the prior art, and finally the bottom edge is attached to the sole unit with adhesive so that it can be roughened and, if necessary, selectively used for all general types of sole assemblies.

FIG. 9 shows the shoe structure of FIG. 8 when unloaded, and FIG. 10 shows a shoe under load when the foot is slightly smaller than the maximum girth the shoe can accommodate.

12 and 13 show a further embodiment according to the invention which functions as the embodiment of 8, 9, 10 and 11 and the adjusting means shown in FIGS. 12 and 13 is a spring A cam 78 that can be manually rotated and adjusted within the shoe to adjust the tensile force of 57, the rear end of the cam passing through the cam follower 82 and a fixed point 83 Is attached to the insole 44. The cam 78 is rotated by the screw 76 to adjust the effective tension of the spring 87 so that the cam folloltler 82 is positioned at the varying radius of the cam groove. When moving along, the girth of the lining assembly and the shoe is self-regulated by cables connected to the front end of the spring to match the feet of the different gauze. In order to limit the movement of the cam follower 82 to the longitudinal movement of the cam follower, the cam follower 82 is fixed to the bottom of the insole and engages with the longitudinally facing metal plate. As shown, the metal plate may extend up to a gromnet 74 and cam follower to prevent longitudinal buckling of the insole 44 during girth adjustment. The insole 44 located between 82 and the grommet 74 is cured.

When the spring is removed from the lining assembly and the cable 86 extends from the grommet 74 along the dashed line 88 through the cam follower 82 to the end fixation point 83, the adjustment action is completely by hand. The adjustment action of the cam by hand determines the distance between opposite side portions of the frame 61.

According to an alternative embodiment not shown in the figure, a spring 72 of FIG. 11 in the transverse direction may be included in this embodiment to enable manual gauze adjustment and automatic gauze adjustment. Similar adjustment springs or cams may optionally be located in the waist region to remove the cable.

14 to 16 illustrate another embodiment of the present invention which has a function similar to that of the previous embodiment, and is designed to be produced at a relatively low cost when price is a critical and important problem. FIG. 14 shows a typical shoe 90 that is not limited to moccasin and loafer tubular structures, wherein the shoe 90 consists of a top 92 of leather or other suitable material, the top 92 includes a plug 94 that is attached to upper 100, liner 98, pluglining 98a by hand-sewn and superimposed seams 96. H.L. in New York State, New York For heavier and more durable products, such as Spandura (registered trademark) sold by Warshow Sons, Inc., or to expand in the direction of girth, such as spantex or other similar materials. The plug lining is made of a suitable material. Liner 98 and pluglining 98a are preferably secured to top 92 at various locations in the shoe. As shown, fastening is performed at the optional pluglining stitching 91a, cuff stitching 91b, hand kicker kicker 91c, and according to the prior art Littleway. The upper 100 and the lining 98 are fixed to the midsole 102 by stitching. The sole unit 104 is attached to the midsole 102 by a prior art adhesive and the midsole 102 and the sole unit 104 are prior art sheets or molds used in a member such as leather, plastic or rubber. (mold) consists of a material. Finally, the insole 106 is removably inserted into the shoe 90 to improve the comfort and durability of the final product.

FIG. 15 shows a shoe that does not require gauze adjustment of the shoe when the foot is placed. Upper 100, liner 98 and plug lining 98a to allow the sides of upper portion 92 and optionally the upper side of upper portion 92 to be deformable in the height and width directions to accommodate a shoe wearer's foot. They are in close contact with or near each other.

As shown in FIG. 16, the upper portion 92 and the plug 94 are in full contact with the liner 98 and plug lining 98a so that the shoe is not deformed from the shape or contour of the last when the shoe is made. do. The figure shows the position of the members of the shoe when receiving the foot of the maximum guss.

The liner 98 and pluglining 98a are made of elastically stretched fabric or other material, between the foot and the upper portion 92, with adjustment in the gus direction at least within the ball area of the shoe. Mechanisms can be used to form variable or adjustable volumes.

These include a plastic or similar bladder containing and sealing a variable amount of air or other gas, gel, flo material or elastic plastic foam. The foam is a polyester-based foam sold by United Foam Products Corp. or other companies in Georgetown, Mass., And capable of thermally molding closed structure cells. The foam is preferably low density up to 2 # / ft ³ . Alternatively, the foam is used to contribute to the elasticity of the gauze control means. In this embodiment it is preferably formed of a fabric or flocking material, and the foam is lined to the elastic inner lining. Lining with sufficient gus adjustment provides at least one full standard width adjustment for at least 1/4 inch of girth adjustability at the foot, waist and ball of the foot Should be. To achieve the girth control and proper compression, the lining should be thicker than the 1/16 inch and 1/8 inch thick woven foam lining material often used in upper linings, ie about 3/8 inch. Should be in the 1/2 inch thickness range. Such thickness creates an open space between the upper line of the shoe and the foot adjacent to the upper line. However, the space between the shoe and the foot is minimized by contours formed by thick foam to reduce the thickness at the upper line in the ball, waist and instep area for a better fit and a better appearance without a void between the shoe and the foot. Even space can be removed. According to another embodiment of the present invention, said contouring means is provided in a foam lining element for use in footwear.

Many known methods for contouring the foam element, including initial molding operations, material removal by leather skiving, remolding slab or plate foam materials, and the like. There is a way. However, the preferred method, which can be applied to various styles of shoes and has the minimum equipment cost, is permanently molded and heat-molded when heated at a temperature of about 260 ° F. to 300 ° F. for about 8 to 12 minutes. Use foam.

The method comprises a plate-shaped lining material of knitted polyurethane foam with a thickness of about 3 / 8-inch to 1 / 2-inch overall and capable of thermal molding, and thereafter a last or other form into the shoe. It is easily done by inserting a) to complete the shape of the shoe, and the last or other shape has the size and contour of a minimum guss foot designed to accommodate the shoe. After placing the last in the shoe, the last is heated using known techniques, eg using a suitable oven, heating the last with hot air, or circulating hot oil or other liquid. Thus, heat is applied appropriately. After cooling, the less compressed area contributes to the constant gauze adjustment of the shoe.

According to another alternative embodiment (not shown), a small leaf spring is inserted between the lining and the upper portion on the side of the shoe's waist area to facilitate the girth adjustment action of the shoe. The leaf springs stamped from a thin, flat spring shim stock, 0.010 inch thick for smaller feet, are plugged with the upper sides deformed outward from the feet. Preforming or bending can be done to fix (upper part of the top) to the lower position. A foot with a large girth pushes the plug up and pushes the side inward against weak restraining action by the spring means so as not to have a maximum contour.

In all of the above embodiments, a shoe made in accordance with the present invention automatically compensates for differences from standard values for girth between the ball and instep.

This has the advantage, in particular, that it fits snugly against the structure of the girth adjustment means according to the prior art, for example, in loafers, boots, casual wear and the like.

Claims (13)

Consists of an upper part 22 attached to the sole assembly 34 and partially deformable to form a cavity into which the foot can be placed, and an adjustable inner assembly 48, 56 attached to the upper part 22, The shoe's girth is adjustable and partially deformable in response to the load applied to the shoe to fit a foot having a different width and girth, which acts in conjunction with the upper portion 22 and consists of an insole lining 50 and a liner 50 Gus adjustable shoes, characterized in that the inner assembly (48, 56) is configured as a deformable portion. According to claim 1, wherein the deformable portion consisting of the insole lining (50) and the liner (50) Gus adjustable shoes, characterized in that the elastic deformation is possible. 3. The shoes of claim 2, wherein the deformable portion capable of elastic deformation is made of an elastic material. The shoe with gauze control according to claim 2, wherein the deformable portion capable of elastic deformation is composed of a frame assembly (60), and the frame assembly (60) has a spring (72). 3. The method of claim 2, wherein the deformable portion that is elastically deformable consists of a frame assembly 60, and a spring 72 is attached to the frame assembly 60 to facilitate the elastic deformation of the frame assembly 60. Gus adjustable shoes, characterized in that. 4. Shoes with gauze control according to claim 1, characterized in that a portion of the inner assembly (48, 56) consists of an insole lining (50) and a liner (50) which are relatively inelastic. The shoes of claim 1, wherein the inner assembly (48, 56) is composed of a frame 61 articulated so that a part of the frame assembly (60) is movable in the transverse direction. . The insole of claim 1, wherein the inner assembly 48 extends along the side of the top 22, consists of an immutable liner 46, extends along the bottom of the cavity formed in the shoe and is elastically deformable insole. Gus adjustable shoes, characterized in that consisting of a lining (50). The shoe as claimed in claim 1, wherein the inner assembly (48) is partially suspended from the interior of the shoe when the foot is not placed in the shoe. The shoe with gauze control according to claim 1, wherein the inner assembly (48) is fixedly attached to the sole assembly (34). 4. Shoes with adjustable gauze according to claim 1, characterized in that the inner assembly (48) consists of means for containing a variable amount of gas. 2. Gus adjustable shoes according to claim 1, characterized in that when the foot is located in a cavity formed in the shoe, the means comprising a variable amount of gas is adjustable for a variable volume between the upper portion (22) and the foot. 4. Gus adjustable shoes according to claim 1, characterized in that the adjustable inner assembly (48) is attached to the upper part (22) deformable at the upper part of the upper part (22).