MECHANISM FOR EASY AND SAFE INSTALLATION, LOCKING AND REMOVING OF WHEELS ON FOOTWEAR

Abstract

Mechanism for easy and safe installation, locking and removal of the wheels on the footwear, belongs to the area of objects for personal use or leisure, characteristic in appearance and use. They can be used as roller skates and also for walking. The mechanism is installed in the supports, and consists of an elastic ball that is inserted into the holes made in the supports. The ball has the function of a spring. The sleeve is firmly tied in the holes of the support by means of a pin. The axle on which the wheels are slidably and rotatably mounted is inserted into the sleeve. With the help of the projection on the axles and the flat seat, under the action of the force from the elastic ball, the wheels are firmly and separable attached to the sole of the footwear.

Description

TECHNICAL FIELD

The invention is generally related to the field of objects for personal use or leisure, and more precisely, to the characteristic footwear distinguished by its appearance and use, and which can be modified, i.e., the wheels can be quickly detached from the roller skates, when the roller skates are used for walking.

Technical Problem

The technical problem solved by the present invention is the following: how to structurally solve the mechanism for easy and safe installation, locking and removal of wheels on footwear, without the use of additional tools, so that footwear could be interchangeably used for either walking, when it is without wheels or for rolling, when the wheels are locked.

STATE OF THE ART

Different constructions of mechanisms for mounting and dismounting of the wheels are known, both in the USA, Europe, as well as in Great Britain, Korea and other countries, but these mechanisms do not allow for easy and quick mounting and dismounting of wheels without the use of tools, using only hands. Very often a support is also needed so that the wheels can be removed or mounted on the footwear.

In the available documents, there are several groups of different types of converting roller skates into footwear for walking. One group of inventions is e.g., with wheels attached to the footwear, where the wheels are foldable when the footwear is used for walking. The second group is with mechanisms that cover the wheels. The third group is with a mechanism that can be separated from the shoes, together with the wheels. The fourth group is with mechanisms that require support, because the process of connecting and disconnecting the wheels is relatively long. The first two groups are comfortable for rolling and blocking the wheels, but it is extremely difficult to use them for walking because they contain wheels and a blocking mechanism. The third group is comfortable for rolling and walking, however, the mechanism with wheels is bulky and heavy to carry.

US patent document no. US2012222329A1 (Convertible shoe for walking an' for roller-skating, having laterally deployable wheels incorporated in its sole) discloses a shoe for walking and roller skating, having wheels built into the sole, which can be deployed laterally on both sides of the shoe by mechanism. The problem with these shoes is that they are relatively heavy, the reason being both the wheels and the metal mechanisms placed in the sole, and that they are not flexible because of the bars that are placed on the sides of the feet. It is not easy to walk in such shoes, especially if a person walks upstairs or if the process of walking is longer. Also, an additional problem can occur if the mechanism becomes dirty due to walking.

The Chinese patent no. CN217661425U (Shoes with folding wheels) discloses wheels connected to the footwear by means of a rotating mechanism. When the user uses the footwear for walking, the wheels are placed in the sole of the footwear. When the footwear is used for roller skating, the wheels are pulled out of the soles of the footwear and placed on the sides of the feet. With this invention, changing the purpose of the footwear is quick, but the user has to sit, and the footwear for walking is extremely heavy and uncomfortable even for a short period of walking.

The US patent document no. U.S. Pat. No. 3,861,697 (Roller skate walker) discloses a roller skate accessory used to cover the wheels of roller skates when the roller skates are used for walking. The accessory has formed recesses in which the wheels are placed to prevent rolling and enable the user to walk. The accessory is connected to the rollers with a wider belt. The disadvantage of this invention is that it is difficult to slide the front wheels with the sneaker while placing both the front and rear wheels in the formed attachment. Since there are practically two points of support in the accessory, the user must use the accessory carefully when walking, in order not to separate the accessory from the roller.

US patent documents no. U.S. Pat. No. 4,413,842A (Walking attachment for roller skates), no. U.S. Pat. No. 4,355,474A (Roller skate sole), no. U.S. Pat. No. 4,364,187 (Skate sandals), disclose roller skates accessories for walking, adapted to accept wheels which, when attached to the roller skates, enable the user to walk safely in shopping malls and buildings where the use of roller skates is forbidden. Roller skates themselves are not light, and when a robust accessory is added to them, they are heavy and not suitable for walking, even if the walk is shorter. When the roller skates are rolling, the roller skates accessory for walking represents a bulky load that must be carried until use.

In Australian patent file AU1390499A (Foot-front actuated roller skates), a walking and rolling sneaker is disclosed. Here, the wheels are fixed to the sneaker using a one-piece frame. At the ends, the frame is provided with U shape supports which are connected to each other by a rigid connection in the shape of a rectangle. The wheels are fixed to the sneaker using the axles by screwing the axle into the shoe with one end with a thread, and the wheel is placed on the other end of the axle. The problem with this footwear is that the wheels with the support and axles are difficult to carry, and the mounting process is long and requires an additional hand tool to secure the wheels.

The French patent no. FR2755031B1 (Patin a roulettes ou a glace) discloses detachable wheels that can be installed on the footwear to which they are adapted, while the footwear can be used for walking without the wheels. The wheels are fixed to a support plate that also carries rear stirrups that can grip the lower part, at the heel of the user. The interface connecting footwear to the plate consists of a hook that automatically attaches to the plate, and of a stirrup for securing the wheels to the footwear. The disadvantage of this invention is the heavy and bulky assemblies of detachable wheels, while at the same time installation of the wheels on the footwear is difficult.

Chinese patent application no. CN105435440A (Shoe sleeve-type roller skates) discloses detachable wheels which are made integral with the mechanism for connection with footwear. The mechanism is in the form of a sleeve made with several strips above the rigid sole, and wheels are firmly and rotatably connected under the sole. The disadvantage of this invention is the bulky and heavy roller skates, as well as long installation times on the footwear, and the user must have support while installing and removing the roller skates.

In a further European patent application EP1331027A1 (Skate with detachable shoe), a roller skate with a detachable sneaker is disclosed. The separation mechanism consists of two sets of engaging members, female and male, which are respectively placed in the sole on the bottom of the shoe and in the mounting plate on the upper side of the roller. They connect to each other using a lever quickly and easily. The problem with this invention is that the mechanism with wheels is heavy to carry, and support is needed to place the mechanism on the footwear.

Two patents of the present applicant also belong to the state of the art. For the first application P-763/02, submitted in 2002, the right was recognized in 2008, under the number RS50006B. This patent solved the same technical problem. However, shortcomings were registered during exploitation. The axles that are inserted into the insole are round on the outside, which after prolonged use of the rollers caused the axle to rotate in the insole, and thus made it impossible to easily and safely separate/connect the wheels so that the sneakers could be used for walking and rolling.

The second patent by the same applicant was granted in 2023 under the number RS63851B. With this patent, the problem of axle rotation in insole was eliminated. However, the process of mounting the wheels still takes a relatively long time, and a tool necessary for mounting the wheels is often lost.

SUMMARY OF THE INVENTION

The aim of the invention is to provide transformable footwear, which is light weight, not robust, with a flexible sole that can be freely deformed while walking, with wheels that can be easily and quickly installed, fixed and removed, even while standing, and without the use of additional tools, only by hand. Footwear on wheels, according to the invention, allows for very quick and easy transition from rolling to walking, and vice versa, and is completely suitable for both uses. The wheels with axles are small in size and light to carry, and the front wheel support is made even lighter by making technical openings on the support itself.

The novelty of the present invention is represented by the improved property of the footwear, thanks to its new construction, i.e. the geometric design of the sleeve and axle, the ball, as an elastic element and the two-stage holes in the supports. Axles with wheels can be installed and removed with ease, and the wheels can be separated from the axles without difficulty. No additional tools are needed to install and remove the wheels, and the shoes are comfortable for walking.

The mechanism is placed in the modified front and rear supports known from the state of the art (RS63851B1), by the same author, which are placed in the holes provided in the sole. Namely, in the supports known from the state of the art, that had holes in which the thread was cut, two-stage holes were drilled. At the bottom of the hole with a smaller diameter, an elastic ball is inserted, made of polyurethane with a hardness of 30±5 Sha. In the hole with a larger diameter, a sleeve is inserted, which is firmly attached to the supports laterally, using a steel pin. In the interior of the sleeve, a crown was made around the circumference of the inner diameter of the sleeve, which reduces the inner diameter of the sleeve. In that part, the inner diameter of the sleeve is smaller than the diameter of the elastic ball so that the ball cannot fall out of the hole in the support when the axles are removed from the sleeves, i.e. footwear. To allow for the insertion of the axle which carries the wheels into the sleeve, the crown from the other end of the sleeve is additionally burrowed along the half the circumference of the inner diameter of the sleeve. With this, a flat surface in the form of a part of a circular ring was created on the crown. At the beginning of the crown, there is an additional recessed flat seat in the form of an isosceles triangle whose vertex is rounded. Opposite the recessed flat seat, a recess is made along the entire length of the crown to the other end of the axle, which is a mirror image of the recessed flat seat.

The elastic balls, at the bottom of the smaller holes, provide resistance to the other end of the axles which are slidably inserted into the sleeves and with which the axles exert pressure on the elastic ball. The axles are reinforced with steel pins at the ends that carry the wheels. The pins are inserted into the holes made in the axis of the axle, and they are protected by polyamide plugs. One end of the plug rests on the pin while the other end of the plug is in line with the end of the axle. The wheels are slidably and rotatably placed on the reinforced axle body, which is under the highest strain during the use. The inner ring of the wheel bearing rests with one end on the increased diameter of the axle. The end of the axle body, which is inserted into the sleeve, is reduced at a sharp angle in a part whose length is greater than the height of the crown with a surface in the form of a part of a circular ring. Along the body of the axle, an additional reduction was made along the circumference of the body covered by an obtuse angle, thereby creating a projection for the connection with the sleeve. The projection has the same shape in the cross-section of the axle body as the recessed flat seat, only it has smaller dimensions which allow it to enter the recessed seat. After the projection, along the body of the axle, the diameter of the axle body is further reduced and is smaller than the diameter of the hole in the supports where the ball is placed, so that end of the axle can enter the hole of smaller diameter and exert pressure on the elastic ball, and so that the ball has space for deformation.

After placing the wheel on the axle body, the axle is slid into the sleeve and gently pushed. The projection end passes through the recess on the sleeve crown, pressing the elastic ball. The projection on the axle passes over the flat surface on the crown in the sleeve. After that, the axle is rotated. During rotation, the projection on the axle slides on a flat surface in the form of a circular ring until, under the action of the elastic force of the ball, it falls into a recess provided on a flat surface in the form of a part of a circular ring. Under the action of the force of the elastic ball, the axle remains in the recess and thus blocks the rotational and axial movement of the axle. When the removal of the wheels is desired, axial pressure is applied to the axle, the ball is additionally deformed, until the projection on the axle comes out of the recess. Then the axle is turned in the opposite direction and pulled out of the sleeve through the recess on the crown.

The advantages of the mechanism for easy and safe installation, with locking and removal of the wheels on the footwear, compared to the mechanisms in the known state of the art are:

• • simple and quick mounting with locking wheels;
  • simple and quick unlocking of the wheels, for dismounting of the wheels and axles;
  • support is not necessary for the user when mounting or dismounting the wheels;
  • no additional tools are required for mounting/dismounting;
  • the wheels cannot be further moved axially when they are locked by the mechanism;
  • the wheels and axles are compact and light to carry.

A BRIEF DESCRIPTION OF THE FIGURES

For better understanding of the invention and its realization in practice, the author refers to the attached drawings where:

FIG. 1 shows roller skates in axonometric view;

FIG. 2 shows a top view of the sole with the incorporated mechanism and wheels;

FIG. 3 shows the C-C section of the FIG. 2;

FIG. 4 shows a side view of the front support;

FIG. 5 shows the section “R-R” of the FIG. 4;

FIG. 6 shows a side view of the rear support;

FIG. 7 shows the section “S-S” of the FIG. 6;

FIG. 8 shows a side view of the sleeve with a groove;

FIG. 9 shows the view “P” of the FIG. 8;

FIG. 10 shows the section “A-A” of the FIG. 8;

FIG. 11 shows a side view of the axle with the projection;

FIG. 12 shows the section “U-U” of the FIG. 11;

FIG. 13 shows the view “P1” og the FIG. 11;

FIG. 14 shows a section along the longitudinal axis of the axle;

FIG. 15 shows a side view of the front mechanism

FIG. 16 shows the section “L-L” from the FIG. 15 and the axles prepared for mounting;

FIG. 17 shows the “L-L” section of FIG. 15 and locked axles in the support sleeve;

FIG. 18 shows the detail “N” of the FIG. 16;

FIG. 19 shows the detail “N” of the FIG. 17;

FIG. 20 shows the section “L-L” of the FIG. 15 and the axles prepared dismounting from the sleeve;

FIG. 20 shows the section “L-L” from the FIG. 19;

FIG. 21 shows the detail “N” from the FIG. 20;

FIG. 22 shows a section along the longitudinal axis of the rear support with axles and wheels prepared for mounting;

FIG. 23 shows detail “K” from the FIG. 22;

FIG. 24 shows a section along the longitudinal axis of the rear support with the mechanism and wheels locked;

FIG. 25 shows detail “K” from the FIG. 24;

FIG. 26 shows a section along the longitudinal axis of the rear support with the mechanism and wheels in the position ready for unlocking;

FIG. 27 shows detail “K” from the FIG. 26;

FIG. 28 shows a section of the wheel along the longitudinal axis.

DETAILED DESCRIPTION

The present invention relates to a mechanism for easy and safe installation with locking, and removal of wheels 4 with axles 8 on footwear 1. Footwear 1 consists of a face 2 and an inner layer 5 which are connected to the sole 6, and are fixed to the user's foot by laces 3. The front support 10 and the rear support 20 are inserted into the sole 6 of the footwear 1. The support 10, 20 from the state of the art, by the same applicant (RS63851B1) is used, wherein the supports 10, 20 are modified for this mechanism. The length of the support 10 is u. The length u is variable and depends on the width of the sole 6 in the area of the toes. The length of the support 20 is u1. The length u1 is also variable and depends on the width of the sole 6 in the area of the heel. The mechanism that is incorporated in the modified supports 10, 20 consists of an elastic ball 11 inserted into the holes 10.1.2, 10.2.2, 20.1.2, 20.2.2 made in the supports 10, 20. The ball 11 is trapped in the holes 10.1.2, 10.2.2, 20.1.2, 20.2.2 using the sleeve 12. The ball 11 has the function of a spring. The sleeve 12 is firmly tied in the holes 10.1.1, 10.2.1, 20.1.1, 20.2.1 of the supports 10, 20 by means of the pin 7 which is inserted into the openings 10.4.1, 10.4.2, 20.4.1, 20.4.2 and at the same time, it passes through the groove 12.2 made on the sleeve 12. In the sleeve 12, the axle 8 is slidably inserted, on which the wheels 4 are slidably and rotatably mounted. With the help of the axle 8, the wheels 4 are firmly and detachably attached to the footwear 1.

In the axes 10′, 10″ of the front support 10, which are separated from each other by a distance x, the existing holes with cut threads, whose axes 10′, 10″ are parallel to the sole 6 of the footwear 1, are modified into two-stage holes 10.1.1, 10.1.2, 10.2.1, 10.2.2. The holes 10.1.1, 10.1.2 are drilled in the axis 10′ at the end 10.1 of the support 10. The holes 10.2.1, 10.2.2 are drilled in the axis 10″ at the end 10.2 of the support 10. The diameter of the holes 10.1.1, 10.2.1 is d and their depth is k1, measuring from the end 10.1 and the end 10.2, respectively. The diameter of the holes 10.1.2, 10.2.2 is d1 and their depth is k2 and are a continuation of the holes 10.1.2, 10.2.2, and the depth k2 is an extension of the depth k1. The diameter d is greater than the diameter d1, and the total depth k of the two-stage hole 10.1.1, 10.1.2, 10.2.1, 10.2.2 is equal to the sum of the depths k1, k2. On the support 10, there are openings 10.4.1, 10.4.2 provided whose longitudinal axis passes through the circle of the hole with a diameter of d. The axes of the openings 10.4.1, 10.4.2 are perpendicular to the axes 10′, 10″ of the holes 10.1.1, 10.2.1 Openings 10.4.1, 10.4.2, of the diameter d9, are made at a distance of k3 from the end 10.1, 10.2. The distance k3 is smaller than the depth k1, so the openings 10.4.1, 10.4.2 are made in the region of the holes 10.1.1, 10.2.1. On the support 10, behind the two-stage holes 10.1.1, 10.1.2, 10.2.1, 10.2.2, perpendicular to the axes 10′, 10″, technical openings 10.5.1, 10.5.2 are provided in order to reduce the mass of the support 10.

In the axis 20′ of the rear support 20, which is parallel to the sole 6 of the footwear 1, at both ends 20.1, 20.2, the existing threaded holes were modified into two-stage holes 20.1.1, 20.1.2, 20.2.1, 20.2.2. The holes 20.1.1, 20.1.2 are drilled in the axis 20′ at the end 20.1 of the support 20. The holes 20.2.1, 20.2.2 are drilled in the axis 20′ at the end 20.2 of the support 20. The diameter of the holes 20.1.1, 20.2.1 is d and their depth k1, measuring from the end 20.1, and 20.2, respectively, and the diameter of the holes 20.1.2, 20.2.2 is d1 and their depth is k2 and are a continuation of the holes 20.1.1, 20.2.1. The diameter d is greater than the diameter d1, and the total depth k of the two-stage holes 20.1.1, 20.1.2, 20.2.1, 20.2.2 is equal to the sum of the depths k1, k2. The depths k1, k start from the ends 20.1, 20.2, and the depth k2 is in the extension of the depth k1 of the holes 20.1.1, 20.2.1. On the support 20, there are openings 20.4.1, 20.4.2 provided, whose longitudinal axis passes through the circle of the hole with a diameter d. The axis of the opening 20.4.1, 20.4.2 is perpendicular to the axis 20′ of the holes 20.1.1, 20.2.1. Openings 20.4.1, 20.4.2, of the diameter d9, are provided at a distance k3 from the end 20.1, 20.2. The distance k3 is smaller than the depth k1, so the openings 20.4.1, 20.4.2 are provided in the region of the holes 20.1.1, 20.2.1.

Depth k2 of the holes 10.1.2, 10.2.2, 20.1.2, 20.2.2, of both supports 10, 20, is at most ⅙ of the depth k1 of the holes 10.1.1, 10.2.1, 20.1.1, 20.2.1.

The mechanism is incorporated in two-stage holes 10.1.1, 10.1.2, 10.2.1, 10.2.2 of the front support 10 and two-stage holes 20.1.1, 20.1.2, 20.2.1, 20.2.2 of the rear support 20. Elastic ball 11 and the sleeve 12, as part of the mechanism, are permanently installed in the two-stage holes 10.1.1, 10.1.2, 10.2.1, 10.2.2, 20.1.1, 20.1.2, 20.2.1, 20.2.2. First, elastic balls 11 are inserted into holes 10.1.2, 10.2.2, 20.1.2, 20.2.2. Then sleeves 12 are inserted slidably into holes 10.1.1, 10.2.1, 20.1.1, 20.2.1. Then, the pins 7 are inserted into the openings 10.4.1, 10.4.2, 20.4.1, 20.4.2 provided on the supports 10, 20 and in the groove 12.2 provided on the sleeve 12. The firm connection of the sleeve 12 with the supports 10, 20 is realized by means of a pin 7, so that the sleeves 12 with the balls 11 remain permanently in the sole 6 of the footwear 1. The supports 10, 20 are then inserted into the holes made in the sole 6. The holes are provided in the area under the toes and under the heel. The support 10 is inserted into the hole on the sole 6 under the toes, and the support 20 is inserted into the hole under the heel. It is important to point out that the surfaces 10.10, 20.10 of the supports 10, 20 are in the same plane as the surface 6.1 in the sole 6.

The sleeve 12 is in the form of a hollow tube with an outer diameter d′ and length j, and it is made of polyamide with glass fiber filler. The outer diameter d′ of the sleeve 12 and the diameter d of the hole 10.1.1, 10.2.1, 20.1.1, 20.2.1 constitute an assembly which is “particularly well guided”. At one end 12.1 of the sleeve 12, on the outside, at a distance of j4 from the other end 12.4 of the sleeve 12, a semicircular groove 12.2 is provided, its greatest depth being g. The axis 12.3 of the groove 12.2 is at right angle to the longitudinal axis of the sleeve 12. The greatest depth g of the semicircular groove 12.2 is less than or equal to half of the diameter of the pin 7. The distance j4 and the distance k3 are of the same length, so that the end 12.4 of the sleeve 12 does not protrude from the ends 10.1, 10.2, 20.1, 20.2 of the supports 10, 20.

At the same end 12.1, but inside the sleeve 12, a crown 12.5 is provided, distal to the other end 12.4 at a distance j3 at an acute angle β to the longitudinal axis of the sleeve 12. The inner diameter d3 of the crown 12.5 is smaller than the diameter D of the elastic ball 11, so that the ball 11 after insertion of the sleeve 12 does not fall out of the hole 10.1.2, 10.2.2, 20.1.2, 20.2.2. The crown 12.5 is burrowed at a depth of h2 from the end 12.1 of the sleeve 12, along the circumference of a circle with a diameter d2, covered by the angle δ. The beginning of the burrow of the crown 12.5 with depth h2 is on one leg of the angle δ, and the end of the burrow of the crown 12.5 is on the other leg of the angle δ. The maximum value of the angle δ is 180° so that the locking and unlocking of the axle 8 with the sleeve 12 can be done as quickly as possible. With this burrow, a flat surface 12.6 in the form of a part of a circular ring of height j1 was formed on the crown 12.5. On the other leg of the angle δ, on the flat surface 12.6, a recessed flat seat seat 12.7 is provided, in the form of an isosceles triangle, with a depth of g1 in relation to the flat surface 12.6. The seat 12.7 is in the form of an isosceles triangle whose vertex is rounded with a radius r at the junction of the legs of the triangle. Tangents 12.8, which are also the legs of an isosceles triangle, connect a circle with radius r and a circle with diameter d3. A circle with radius r and a circle with diameter d2 touch at point 12.10 with a common axis.

Opposite the seat 12.7, along the crown 12.5, a depression 12.9 with a depth of h2 and a height of j1 is provided, which, as a mirror image, corresponds to the seat 12.7 and is used for the passage of the projection 8.5, which is provided on the body 8.4 of the axle 8.

Axle 8 consists of a body 8.4, which is stepped on the outside, and is made of polyamide with glass fiber filler. The length of the body 8.4 is f, which at one end 8.1 has the largest diameter d8 and length f2. The diameter d8 is smaller than the diameter d14 of the wheel 4, and larger than the diameter d13 of the support 15. This is necessary and has a purpose of keeping the wheel 4 on the axle 8. Further, the diameter d8, along the body 8.4, is reduced to the diameter d4 of the length f1. The diameter d4 of the body 8.4 of the axle 8 and the diameter d2 of the sleeve 12 render the assembly “particularly well guided”. The diameter d4 is further along the body 8.4 at an acute angle β to the longitudinal axis of the body 8.4, reduced to a diameter d5 which is smaller than the diameter d3 of the sleeve 12, and whose length is f4. The length f4 of the body 8.4 is bigger than the height j1 of the crown 12.5 so that the projection 8.5 on the body 8.4 could rotate above the surface 12.6 in the sleeve 12, when the ball 11 is most deformed. Further along the body 8.4, the diameter d4 is reduced, at the length f5, so that the reduction is covered by: the angle 360°−θ, the radius r1 which has one common point 8.7 with the diameter d4, at the half of the angle θ, and the tangents 8.6 that join the circle of diameter d5 and a circle of radius r1. In the continuation of the axle 8, at the other end 8.2, the body 8.4 has the smallest diameter d6. Length f3 with the diameter d6 is cut at the end of 8.2 at a sharp angle λ.

In the axis of the body 8.4, at the end 8.1, a hole 8.3 of depth f6 and diameter d7 is provided. A steel pin 9 is inserted into the hole 8.3, the steel pin 9 being firmly connected to the body 8.4. The pin 9 has a smaller length than the depth f6 of the hole 8.3, so after inserting the pin 9 into the hole 8.3, a plug 13 is inserted whose outer circular surface 13.1, after insertion into the hole 8.3, is in the plane of the end 8.1 of the body 8.4. The pin 9 is inserted into the body 8.4 because that part of the body 8.4 of the axle 8 suffers the greatest strain during use. In the assembly with the sleeve 12, one part of the pin 9 in the body 8.4 is in the sleeve 12, and the wheel 4 is placed on the other part. The wheel 4 is slidably and rotatably connected to the axle 8 on the part of the body 8.4 which has the diameter d4.

If the axle 8 is made of steel, it is in the shape of the body 8.4, but without the hole 8.3. The wheel 4 is an integral part of the footwear 1, when the footwear is used for rolling, and together with the support 15 of the bearings 14, has the width b. The support 15 has an internal diameter of d13. The diameter d13 of the support 15 and the diameter d4 of the body 8.4 form a loose assembly, so that the wheel 4 can turn and slide on the part of the body 8.4 of the length f1.

The length f1 of the body 8.4 is equal to the sum of the width b of the support 15 and the distance j3 from the end 12.4 of the sleeve 12 increased by 0.5 mm to 0.7 mm, preferably by 0.6 mm. This is necessary in order to ensure the movement of the axle 8 in the sleeve 12 for the purpose of locking, i.e. that the projection 8.5 is above the surface 12.6, i.e., the unlocking of the axle 8 in the sleeve 12.

The placement of the axles 8 in the sleeve 12 is done by first pulling the wheels 4 on the body 8.4 over the end 8.2. At the same time, holding the axle 8 by the end 8.1, together with the mounted wheel 4, the axle 8 is manually inserted into the sleeve 12 and tightly connected or separated from the sleeve 12. In order for the axle 8 to come to the position that ensures locking, it is necessary to rotate the axle 8 so that the projection 8.5 on the body 8.4 passes through the depression 12.9 above the crown 12.5. By manually pressing one end 8.1 of the axle 8, the end 8.2 deforms the elastic ball 11. In this way, the projection 8.5 comes above the surface 12.6. Then the axle 8 is rotated until the projection 8.5, under the action of the force from the elastic ball 11, falls into the seat 12.7 of depth g1. After that, the wheels 4 with the axle 8 are firmly connected to the sleeve 12, i.e. the supports 10, 20.

When taking off the wheels 4 is desired, that is, use of the footwear for walking, the axle 8 is slightly pushed axially in the sleeve 12, the ball 11 is additionally deformed, so that the projection 8.5 comes out of the groove 12.7. After that, the axle 8 is moved by a circular motion to the depression 12.9 and under the action of the elastic force from the ball 11, it is removed from the sleeve 12 together with the wheels.

The supports 10, 20, sleeve 12, body 8.4 and plug 13 are made of plastic with filler, and it is most preferable to make them of polyamide with 30% of glass fibers. Elastic ball 11 is made of polyurethane 30±5 ShA.

For better storage and easier carrying of wheels 4 and axles 8, wheels 4 are removed from axle 8 and placed in a specially made case, next to each other, and axles 8 are placed one above the other next to the wheels 4.

Claims

1. Mechanism for easy and safe installation, locking and removal of wheels on footwear (1), consisting of wheels (4) with support (15) for the bearings (14) of the width (b), shoelaces (3) connected to the face (2) and the inner layer (5) which are firmly connected to the sole (6) into which a support (10) is inserted at one end, whose axes (10′, 10″) of the ends (10.1, 10.2) are made at a distance (x) from each other, and at the other end a support (20) is inserted whose ends (20.1, 20.2) are in the same axis (20′), characterized in that a two-stage hole (10.1.1, 10.1) is drilled in the axis (10) of the end (10.1), wherein a two-stage hole (10.2.1, 10.2.2) is drilled in the axis (10″) of the end (10.2), wherein a two-stage hole (20.1.1, 20.1.2) is drilled in the axis (20′) of the end (20.1), wherein a two-stage hole (20.2.1, 20.2.2) drilled in the axis (20′) of the end (20.2), wherein the holes (10.1.1, 10.2.1, 20.1.1, 20.2.1) of the diameter (d) are drilled at a depth (k1) from the ends (10.1, 10.2, 20.1, 20.2) of the supports (10, 20), wherein the holes (10.1.2, 10.2.2, 20.1.2, 20.2.2) of the diameter (d1) are drilled at the depth (k2) in the extension of the depth (k1), wherein at the bottom (10.3.1, 10.3.2, 20.3.1, 20.3.2) of the holes (10.1.2, 10.2.2, 20.1.2, 20.2.2) elastic balls (11) are inserted of the diameter (D), wherein in the holes (10.1.1, 10.2.1, 20.1.1, 20.2.1) of diameter (d), sleeves (12) of diameter (d′) are inserted, wherein the sleeves (12) are firmly connected to the ends (10.1, 10.2, 20.1, 20.2) of the supports (10, 20) by means of pins (7) which are inserted into the openings (10.4.1, 10.4.2, 20.4.1, 20.4.2), drilled at a distance (k3) from the ends (10.1, 10.2, 20.1, 20.2) of the supports (10, 20), and into the semicircular groove (12.2) provided on the sleeve (12), wherein the axle (8) is inserted into the wheel (4) with the end (8.2) and rotatably and slidingly connected with the wheel (4), and wherein the axles (8) are inserted into the sleeves (12) with the end (8.2) and firmly and detachably connected with the sleeves (12).

2. Mechanism according to claim 1, wherein the axle (8) consists of a body (8.4) in which a steel pin (9) is firmly connected to one end (8.1) of the body (8.4) in the hole (8.3), wherein in the same hole (8.3) in the continuation of the pin (9) a plug (13) is firmly connected and wherein the flat circular surface (13.1) of the plug (13) is in the same plane as the end (8.1) of the body (8.4) of the axle (8).

3. The mechanism according to claim 1, wherein the body (8.4) of the axle (8) of length (f) is stepped on the outside, wherein at one end (8.1) of the body (8.4) in the axis of the body (8.4) the hole (8.3) of depth (f6) and diameter (d7) is drilled, wherein on the same side of the body (8.4) diameter (d8) of the body (8.4) of the length (f2) is the largest, wherein the central part of the body (8.4) of the diameter (d4) is smaller than the diameter (d8), wherein the body (8.4) has the diameter (d8) and length (f1), wherein the length (f1) of the body (8.4) is the greatest, wherein the body (8.4) of diameter (d4) after the length (f1), is reduced at an acute angle (p) to the diameter (d5) of the length (f4), wherein the diameter (d4) in the continuation of the length (f5) is reduced, and the reduction was made along the circumference of the body (8.4) covered by the angle (360°−θ)), the radius (r1), which has one common point (8.7) with the diameter (d4) on the half of the angle (θ) and the tangents (8.6) that join the circles of the diameter (d5) and radius (r1), wherein the projection (8.5) is formed by the angle (θ), the radius (r1) and tangents (8.4), and wherein, in the continuation at the other end (8.2), the diameter (d6) of the length (f3) is the smallest, and the end (8.2) of the axle is cut at a sharp angle ( )).

4. Mechanism according to claim 1, wherein the diameter (d1) is smaller than the diameter (d), wherein the depth (k2) is at most ⅙ of the depth (k1), wherein the diameter (D) of the elastic ball (11) is smaller than the diameter (d1) of the hole (10.1.2, 10.2.2, 20.1.2, 20.2.2) at the bottom (10.3.1, 10.3.2, 20.3.1, 20.3.2) and wherein the diameter (D) of the elastic ball (11) greater than or equal to the depth (k2) of the hole (10.1.2, 10.2.2, 20.1.2, 20.2.2).

5. Mechanism according to claim 1, wherein on one end (12.1) of the sleeve (12) with an outer diameter (d′) and length (j), on the outside of the sleeve (12) at a distance (j4), a semicircular groove (12.2) is provided whose axis (12.3) is at the right angle to the longitudinal axis of the sleeve (12), wherein the distance (4) is the distance between the axis (12.3) of the groove (12.2) and the end (12.4) of the sleeve (12), wherein the maximum depth (g) of the groove (12.2) is less than or equal to half the diameter of the pin (7), wherein at the same end (12.1) inside the sleeve (12), a crown (12.5) of internal diameter (d3) is provided at a distance (j3) from the end (12.4), wherein the crown (12.5) from the end (12.1) of the sleeve (12) is burrowed at the depth (h2) along the circumference of the circle with the diameter (d2) covered by the angle (δ), wherein the beginning of the crown (12.5) is in one leg of the angle (δ), wherein the end of the crown (12.5) is on the second leg of the angle (δ), whereby the surface (12.6) is created, in the form of a part of a circular ring, wherein the recessed flat seat (12.7) is provided on the second leg of the angle (δ) on the surface (12.6) in the form of an isosceles triangle, with the depth (g1), which is the vertex in which the legs of the isosceles triangle are joined, rounded with the radius (r), wherein the seat (12.7) is bordered by the radius (r) and tangents (12.8), that are also the legs of an isosceles triangle and by which the circle of radius (r) and the circle of diameter (d3) are connected, wherein the circle of radius (r) and the circle of diameter (d2) touch at one common point (12.10) with the common axis and wherein opposite the recessed flat seat (12.7), covering the height (j1) of the crown (12.5) and the depth (h2), the depression (12.9) is provided, which corresponds to the seat (12.7) as a mirror image and wherein the circle of radius (r) and the circle of diameter (d2) touch at one point (12.10) with a common axis.

6. Mechanism according to claim 1, wherein the outer diameter (d′) of the sleeve (12) and the inner diameter (d) of the hole (10.1.1, 10.2.1, 20.1.1, 20.2.1) form an assembly “especially well guided”, wherein the inner diameter of the crown (d3) of the sleeve (12) is smaller than the diameter (D) of the elastic ball (11), wherein the length (j) is less than or equal to the depth (k1) and wherein the distance (j4) and the distance (k3) are equal.

7. Mechanism according to claim 4, wherein the outer diameter (d′) of the sleeve (12) and the inner diameter (d) of the hole (10.1.1, 10.2.1, 20.1.1, 20.2.1) form an assembly “especially well guided”, wherein the inner diameter of the crown (d3) of the sleeve (12) is smaller than the diameter (D) of the elastic ball (11), wherein the length (j) is less than or equal to the depth (k1) and wherein the distance (j4) and the distance (k3) are equal.

8. Mechanism according to claim 5, wherein the outer diameter (d′) of the sleeve (12) and the inner diameter (d) of the hole (10.1.1, 10.2.1, 20.1.1, 20.2.1) form an assembly “especially well guided”, wherein the inner diameter of the crown (d3) of the sleeve (12) is smaller than the diameter (D) of the elastic ball (11), wherein the length (j) is less than or equal to the depth (k1) and wherein the distance (j4) and the distance (k3) are equal.

9. Mechanism according to claim 1, wherein the diameter (d4) of the body (8.4) of the axle (8) and the diameter (d2) of the sleeve (12) make the assembly “particularly well guided”, wherein the diameter (d6) of the end (8.2) is smaller than the diameter (d1) of the hole (10.1.2, 10.2.2, 20.1.2, 20.2.2), wherein the radius (r) of the recessed flat seat (12.7) is greater than the radius (r1) of the projection (8.5) and wherein the maximum value of the angle (δ) is 180°.

10. Mechanism according to claim 2, wherein the diameter (d4) of the body (8.4) of the axle (8) and the diameter (d2) of the sleeve (12) make the assembly “particularly well guided”, wherein the diameter (d6) of the end (8.2) is smaller than the diameter (d1) of the hole (10.1.2, 10.2.2, 20.1.2, 20.2.2), wherein the radius (r) of the recessed flat seat (12.7) is greater than the radius (r1) of the projection (8.5) and wherein the maximum value of the angle (δ) is 180°.

11. Mechanism according to claim 3, wherein the diameter (d4) of the body (8.4) of the axle (8) and the diameter (d2) of the sleeve (12) make the assembly “particularly well guided”, wherein the diameter (d6) of the end (8.2) is smaller than the diameter (d1) of the hole (10.1.2, 10.2.2, 20.1.2, 20.2.2), wherein the radius (r) of the recessed flat seat (12.7) is greater than the radius (r1) of the projection (8.5) and wherein the maximum value of the angle (δ) is 180°.

12. Mechanism according to claim 4, wherein the diameter (d4) of the body (8.4) of the axle (8) and the diameter (d2) of the sleeve (12) make the assembly “particularly well guided”, wherein the diameter (d6) of the end (8.2) is smaller than the diameter (d1) of the hole (10.1.2, 10.2.2, 20.1.2, 20.2.2), wherein the radius (r) of the recessed flat seat (12.7) is greater than the radius (r1) of the projection (8.5) and wherein the maximum value of the angle (δ) is 180°.

13. Mechanism according to claim 5, wherein the diameter (d4) of the body (8.4) of the axle (8) and the diameter (d2) of the sleeve (12) make the assembly “particularly well guided”, wherein the diameter (d6) of the end (8.2) is smaller than the diameter (d1) of the hole (10.1.2, 10.2.2, 20.1.2, 20.2.2), wherein the radius (r) of the recessed flat seat (12.7) is greater than the radius (r1) of the projection (8.5) and wherein the maximum value of the angle (δ) is 180°.

14. Mechanism according to claim 1, wherein the length (f1) of the body (8.4) of the axle (8) is greater by 0.5 mm to 0.7 mm than the sum of the distance (3) of the sleeve (12) and the width (b) of the support (15) of the bearings (14) and the length (f1) of the body (8.4) is most preferably greater by 0.6 mm than the sum of the distance (j3) of the sleeve (12) and the width (b) of the support (15) of the bearings (14).

15. Mechanism according to claim 2, wherein the length (f1) of the body (8.4) of the axle (8) is greater by 0.5 mm to 0.7 mm than the sum of the distance (3) of the sleeve (12) and the width (b) of the support (15) of the bearings (14) and the length (f1) of the body (8.4) is most preferably greater by 0.6 mm than the sum of the distance (j3) of the sleeve (12) and the width (b) of the support (15) of the bearings (14).

16. Mechanism according to claim 3, wherein the length (f1) of the body (8.4) of the axle (8) is greater by 0.5 mm to 0.7 mm than the sum of the distance (3) of the sleeve (12) and the width (b) of the support (15) of the bearings (14) and the length (f1) of the body (8.4) is most preferably greater by 0.6 mm than the sum of the distance (j3) of the sleeve (12) and the width (b) of the support (15) of the bearings (14).

17. Mechanism according to claim 4, wherein the length (f1) of the body (8.4) of the axle (8) is greater by 0.5 mm to 0.7 mm than the sum of the distance (3) of the sleeve (12) and the width (b) of the support (15) of the bearings (14) and the length (f1) of the body (8.4) is most preferably greater by 0.6 mm than the sum of the distance (j3) of the sleeve (12) and the width (b) of the support (15) of the bearings (14).

18. Mechanism according to claim 5, wherein the length (f1) of the body (8.4) of the axle (8) is greater by 0.5 mm to 0.7 mm than the sum of the distance (3) of the sleeve (12) and the width (b) of the support (15) of the bearings (14) and the length (f1) of the body (8.4) is most preferably greater by 0.6 mm than the sum of the distance (j3) of the sleeve (12) and the width (b) of the support (15) of the bearings (14).