US20170049190A1

Movatterモバイル変換

Info

Publication number: US20170049190A1
Application number: US15/306,321
Authority: US
Inventors: Joseph Franciscus August Alfred Maussen
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-04-25
Filing date: 2015-04-17
Publication date: 2017-02-23
Also published as: WO2015162066A1

Abstract

Shoe comprising:—a sole having a lower surface;—an upper provided with connecting means arranged for receiving lacing;—a lacing tensioning mechanism arranged for tensioning the lace received in said connecting means, wherein the lacing tensioning mechanism is moveable between a loose position with reduced lacing tension for easy access in the shoe and a second tensioned position wherein the lace is under tension; and—an actuator mechanism for moving the lacing tensioning mechanism between the positions, wherein actuator mechanism comprises a moveable sole part which is moveable from and into the surface of the sole and wherein the actuator mechanism is arranged for moving the lacing tensioning mechanism from the loose position to the tensioned position upon movement of the moveable sole part into the surface of the sole.

Description

The present invention relates to a shoe comprising a sole having a lower surface, an upper provided with connecting means arranged for receiving lacing, a lacing tensioning mechanism arranged for tensioning the lace received in said connecting means, wherein the lacing tensioning mechanism is moveable between a loose position with reduced lacing tension for easy access in the shoe and a second tensioned position wherein the lace is under tension and an actuator mechanism for moving the lacing tensioning mechanism between the positions.
Typically, a shoe is fastened using laces (or shoestrings) which are received and guided in holes, eyelets, loops or hooks on either side of the shoe, more specifically the upper, and which form the connecting means for lacing. Tying a shoelace for fastening a shoe is however difficult, especially for smaller children and elderly people.
Next to the alternatives of for instance Velcro, zippers or straps with buckles which allow fastening of shoes without tying a knot, shoes are known which are provided with lacing tensioning mechanisms. These mechanisms allow tensioning of the lace without actually tying a knot. It is for instance known to provide a turning knob as actuator which tensions the lace upon turning or to provide a clamp at the lace ends for interconnection. It is however a drawback that these known mechanisms are still difficult to operate, in particular for children and elderly people as mentioned above.
It is therefore a goal of the present invention, amongst other goals, to provide an efficient, easy in use shoe which can be fastened and/or loosened easily.
This goal, amongst other goals, is met by a shoe according to claim1. More specifically, to meet this goal, amongst other goals, the shoe according to the invention comprises:
a sole having a lower surface;
an upper provided with connecting means arranged for receiving lacing;
a lacing tensioning mechanism arranged for tensioning the lace received in said connecting means, wherein the lacing tensioning mechanism is moveable between a loose position with reduced lacing tension for easy access in the shoe and a second tensioned position wherein the lace is under tension; and
an actuator mechanism for moving the lacing tensioning mechanism between the positions, wherein actuator mechanism comprises a moveable sole part which is moveable from and into the surface of the sole and wherein the actuator mechanism is arranged for moving the lacing tensioning mechanism from the loose position to the tensioned position upon movement of the moveable sole part into the surface of the sole.
According to the invention, the lacing tensioning mechanism is actuated by a movement of a part of the sole. In a resting position, in which position the lacing tensioning mechanism is in the loose position for easy access in the shoe, the moveable part of the sole extends, or in other words protrudes, from the surface of the sole. By stepping into the shoe and exerting a force on the moveable part, the moveable part is moved into the surface of the sole, or in other words is moved towards a position wherein the moveable part is aligned with the surface of the sole. This movement activates the lacing tensioning mechanism, such that by simply stepping into and onto the shoe, the shoe can be fastened. It will be appreciated that fastening the laces in a shoe according to the invention does not require any manual work, which is typically the problem with children and elderly people.
It should be noted that the surface of the sole as defined herein is not necessarily flat. The sole typically bends in use, such that the surface is accordingly bent. The sole may further be provided with a heel, which extends from the surface. The term surface of the sole should therefore be understood as the surface of the sole in a state wherein the user walks on the shoe.
The shoe according to the invention preferably uses a convention lace. It is however also possible that other tensioning or fastening means are used which can be tensioned using the tensioning mechanism.
According to a further preferred embodiment, the actuator and/or the lace tensioning mechanism is arranged outside of the space for receiving the foot of the user, which is preferably defined by the inner sole and the inner surface of the body of the shoe. This allows an efficient insertion of the foot in the shoe.
According to a preferred embodiment, the lacing tensioning mechanism is arranged to receive a part of the lace in a moving body which is moveable to and from the connecting means for loosening and tensioning the lace, wherein the actuator is arranged to move the moving body. By moving the moving body, the distance, or path length for the lace, between the connecting means and the moving body is changed, thereby tensioning said lace upon elongated the distance and vice versa.
A compact composition while allowing sufficient room to move for the moving body for efficiently tensioning and loosing the lace is obtained if the moving body is arranged to move and is guided in a plane parallel to the surface of the sole. The shoe may thereto be provided with a guide, for instance in the form of rails or rods, which are arranged to guide the moving body. The guides preferably limit movement of moving body along a single line in said plane. Preferably, the guide for the moving body comprises opposing slits for receiving lateral edges of a substantially planar moving body. The slits allow movement of the moving body along the lengths of the slits. A very compact composition is obtained if the moving body is incorporated in the sole.
According to a further preferred embodiment, the shoe comprises guiding means for guiding the lace from the connecting means to the moving body. The guiding means may for instance comprise channels for receiving ends of lacing and may extend between the connecting means, for instance in the form of holes, to a location near the moving body. Upon movement of the moving body, the lace in the guiding means is tensioned, thereby tensioning the lace in the connecting means for fastening the shoe. The guiding means preferably extend from the connecting means to a position in the shoe near the moving body in the loose position. For moving towards the tensioned position, the moving body is moved away from the end, or opening, of the guiding means, thereby applying tension on the lace.
It is preferred if the moving body is biased towards the connecting means, such that the lacing tensioning mechanism is biased towards the loose position. If the moving body is not forced or actuated, it will automatically move towards, i.e. shortens the lace path length to, the connecting means, thereby loosening the lacing. This allows efficient loosening of the shoe.
To prevent accidental loosening of the shoe in use, it is preferred if the shoe further comprises locking means arranged for locking the lacing tensioning mechanism in the tensioned position. The lacing tensioning mechanism is hereby actively held in the tensioned position, where upon unlocking, the tensioning mechanism moves to the loose position. An efficient locking mechanism is obtained if the locking means are arranged to lock the moveable sole part in the position in the surface of the sole. If the moveable sole part as actuator is locked, the tensioning mechanism is also locked. The locking means may for instance comprise a releasable connection between the sole parts.
As said, the use of a moving body which is moveable, for instance to and from the connecting means, for loosening and tensioning the lace, preferably in the plane of the sole, allows efficient tensioning of the lace part connected to the lace tensioning mechanism with a relative small displacement of the moveable sole part.
Although it is possible that the lace part is directly coupled to the moving body for tensioning and loosening the lace upon movement of the moving body, it is according to a further preferred embodiment also possible that the lacing tensioning mechanism further comprises at least one reel for receiving the part of the lace, wherein the reel is arranged for tensioning and loosening said lace upon rotation, wherein the moving body is arranged for engaging said reel for rotating the reel upon movement of the moving body. The translational movement of the moving body, in particular to and from the connecting means preferably in the plane of the sole, is hereby converted to a rotational movement for tensioning and loosening the lace received in the reel. This allows a relative large movement of the lace part, i.e. a large difference between the tensioned and loosened position, using a relative small displacement of the moving body and thereby movement of the moveable sole part. An end of the lace is preferably connected to said reel, such that upon rotation in a first direction of the reel, the lace is tensioned and that upon rotation in an opposite direction the lace is loosened.
The reel and the moving body are hereto preferably provided with cooperating engagement surfaces in contact with each other for transferring the translational movement of the moving body into a rotational movement of the reel. A reliable transfer is obtained if the moving body is provided with a rack and the reel is provided with a cooperating pinion. Dependent on the gear ratio, the desired difference in lace length between the tensioned and loosened position can be determined on the basis of the movement of the moving body.
According to a further preferred embodiment, the lacing tensioning mechanism comprises two reels, wherein each of the reels is arranged to receive a respective end of the lace. This results in an even tensioning and loosening of the lacing upon movement between the positions. Although it is possible that a first reel is rotated by engagement of the moving body and the second reel is rotated by engagement of the first reel, a reliable tensioning and loosening action is obtained when both reels are in engagement with the moving body for rotating said reels. A particularly compact and stable combination is obtained if the moving body is arranged between and in engagement with the two reels. The reels hereby rotate in opposite directions upon movement by the moving body.
The reel, or the two reels as explained above, preferably has a rotational axis extending perpendicular to the plane of the sole. A movement of the moving body in the plane of the sole then results in the rotation for loosening and tensioning the lace. It is hereby preferred if the reel(s) is/are rotatably connected to a stationary part of the sole opposite the moveable sole part.
According to a further preferred embodiment, the moveable sole part is hingeably connected to a stationary part of the sole. The moveable sole part hereby hinges or rotates for moving from and into the surface of the sole. It is possible that the sole hereto comprises a hinging mechanism comprising for instance a hinging axle. It is however preferred if the moveable sole part is hingeable due to the flexibility of the material of the sole. The moveable sole part may for instance be formed by cutting out a section of sole, while leaving the moveable sole part connected to the remainder of the sole along one edge. This edge interconnecting the moveable sole part and the remainder of the sole then forms the hinge. It is preferred if the moveable sole part is formed by a cut in the sole along a plane parallel to the sole.
A reliable hinging action while allowing easy access in the shoe is obtained if the moveable sole part is arranged to hinge about a centrally located hinging axis. The axis hereby extends a central location, making it less vulnerable than for instance an axis at the front or back of the shoe.
According to a further preferred embodiment, the actuator mechanism comprises a pushing rod extending between a sole part and the moving body for transferring the movement of the movable sole part to the moving body. Although it is possible that the moving body is arranged on the movable sole part, such that the pushing rod extends between the moving body and a stationary part of the sole, it is preferred if the actuator mechanism comprises a pushing rod extending between an end part of the moveable sole part opposite the hinging axis and the moving body, wherein the pushing rod is arranged for moving the moving body on movement of the moveable sole part. The pushing rod hereby transfers the force of the hinging moveable sole part to the moving body. The pushing rod is hereto also hingeably connected to the moveable sole part and the moving body.
In order to provide an efficient movement to the tensioned position by stepping into the shoe, it is preferred if the moveable sole part forms the back part towards the heel of the sole. Further, in case of a tensioning mechanism comprising a moving body, this ensures sufficient room for the tensioning mechanism.
To allow an efficient transfer of the tensioning or loosening action along the connecting means for lacing upon activating the tensioning mechanism, it is preferred if the connecting means for receiving lacing comprise rotatable wheels, such as pulleys, for receiving and guiding a lace. This allows a more homogeneous distribution of the forces along the lace in the connecting means. This facilitates loosening and tensioning of the shoe. The rotatable wheels are preferably provided with a shielding wall, which encloses the lace between the wall and the wheel, such that the lace cannot come loose from the connecting means. The wall preferably extends along a length of the perimeter surface of the wheel, preferably at the outer or lateral sides of the shoe.
It is noted that the connecting means as wheels may also be applied to shoes having convention laces, i.e. without the actuator formed by the moveable sole part or without lacing tensioning mechanism.
To further facilitate the user of the shoe while stepping into the shoe, a further preferred embodiment of the shoe further comprises biasing means which are arranged for opening the body of the shoe for easy entry in the loose position of the lacing. Opening the body means that the entry opening of a foot in the shoe is enlarged. It is preferred if the biasing means are incorporated in the body of the shoe.
The biasing means for instance comprise elastic means, for instance springs or elastic fibres, arranged for urging wall sections of the body of the shoe outwardly. More specifically, the biasing means preferably comprise elastic means arranged to exert an outwardly oriented elastic force on the body. It is preferred if the biasing means are arranged in the body:

In particular the entry opening, the upper (the location of the connecting means) and the tongue limit easy entry in a shoe. By providing the biasing means at at least one of these locations, entry into the shoe is made easier. The biasing means may for instance comprise spring or elastic fibres as described above which are arranged around the opening, in the upper and in the tongue and which are biased towards an opening position. Also the biasing means may be applied to shoes having convention laces, i.e. without the actuator formed by the moveable sole part or without lacing tensioning mechanism.

The present invention is further illustrated by the following Figures, which show a preferred embodiment of the device according to the invention, and are not intended to limit the scope of the invention in any way, wherein:

FIG. 1 schematically shows a shoe according to the invention in perspective;

FIG. 2 shows the shoe from behind;

FIGS. 3 and 4 schematically show the tensioning mechanism in side view in two different stages of tensioning the shoe;

FIG. 5 shows another embodiment of the tensioning mechanism from behind, and;

FIGS. 6 and 7 schematically show the tensioning mechanism seen along arrow VI inFIG. 5 in respectively the loosened and tensioned position of the tensioning mechanism.

InFIG. 1, a shoe1 is shown which is provided with a sole10 and an upper11, which forms abody12 of the shoe1. The upper11 is provided with connecting means for lacing3 in the form ofpulleys2. Thepulleys2 comprisewheels21 which are arranged to rotate for efficiently guiding theshoelace3. Thewheel21 is partly enclosed by awall22 to prevent thelace3 from coming loose. Thewalls22 are arranged at the lateral sides of thewheels21 ofpulley2, such that thelace3 can be arranged in a zig-zag fashion between the two sides of the upper11.

Thelace3 in this embodiment is tied in aknot31 at a frontal location of the shoe1 and runs through thepulleys2 towardsentries15aofchannels15 for guiding thelace3 from the connecting means to alacing tensioning mechanism4 which will be explained in greater detail below. The tensioning mechanism is arranged for automatically tensioning and loosening thelace3 and thereby the shoe1.

To facilitate entry of a foot in the shoe1 in a loosened state of thelace3, the wall surrounding theopening13 of the shoe1 is provided with aspring member13aextending along said wall. Thespring member13aexerts an outwardly directed force, indicated with arrows B, which opens the entry opening13 in the loose state of thelace3. Also the inner edge of the upper11 is provided with aspring member11awhich extends along said edge. Thespring member11aexerts a biasing force directed laterally outwardly, as indicated with arrows C. This also opens the shoe1 in loosened state of thelace3. Finally, also thetongue14 of the shoe1 is provided with aspring member14awhich biases thetongue14 to open, as indicated with arrow D. The

spring members

13a,11aand14aform biasing means for biasing thebody12 in an opening position of the shoe1, such that a foot can be easily inserted in the shoe1.

The lacingtensioning mechanism4 will now be elucidated with reference toFIG. 2-4. Thetensioning mechanism4 comprises a movingbody41 which is arranged to receive a part of thelace3 inopenings41a.In this example, thelace3 is wound along the movingbody41. More specifically, thelace3 enters thechannel15 at theentry15anear the connectingmeans2, see in particularFIG. 3, and leaves thechannel15 at theend15bnear thetensioning mechanism4 in the sole10. Thelace3 then enters thefirst hole41aof the movingbody41, returns in thesecond hole41ato subsequently enter a channel again in an end (not shown) of the channel towards the connectingmeans2. The lace thus forms a loop from the knot31 (FIG. 1), through the connectingmeans2, the twochannels15 provided at both lateral sides of the shoe1 and the movingbody41.

The movingbody41 is guided byrods42 which are arranged on an uppersole part10d(as will be explained below). The movingbody41 is allowed to move along therods42. As an alternative (not shown), the movingbody41 is substantially planar and is guided at the lateral edges in correspondingly shaped slits arranged in wall sections of a recess in the uppersole part10d.The slits then form the guides for guiding the movingbody41. The movingbody41 is further connected to the uppersole part10dby aspring43 or another material with elastic properties, such as an elastic band, for instance made of rubber. Thespring43 forces the movingbody41 in the position as shown inFIG. 2, i.e. towards theends15bof thechannels15.

For moving the movingbody41, anactuator5 is provided in the form of a moveablesole part10a.The moveablesole part10ais formed by cutting the back half of the sole10 in two, thereby forming a uppersole part10dwhich is fixedly connected to thebody12 and amoveable part10awhich is hingeably connected to theremainder10bof the sole. The uppersole part10dand/or the moveablesole part10aare provided with a recess for receiving thetensioning mechanism4 there between. During use, the lower surface of the uppersole part10dand the upper surface of the moveablesole part10aat least partly abut, such that these surfaces form end surfaces.

Thehinge axis10cis located at a central region of the shoe. A connectingplate51 fixed on the upper surface of the moveablesole part10aconnects to apush rod52 which is at its other end connected to the movingbody41. Pivoting of the moveablesole part10a(indicated with A inFIG. 1) will thus result in a movement of the movingbody41, as will be explained below.

InFIG. 3, thetensioning mechanism4 is in its loose position. The distance between the movingbody41 and theends15bof thechannels15 is hereby small. By stepping into the shoe1, a movement indicated with III inFIG. 4 is initiated, thereby pivoting the moveablesole part10atowards the uppersole part10din a direction indicated with II inFIG. 4. Due to this pivoting movement, the pushingrod52 will push the movingbody41 in a direction indicated with I along therods42. The distance between the movingbody41 and theends15bof thechannels15 is thereby increased, thereby increasing the path length of thelace3 and thus thereby tensioning thelace3. Thepulleys2 as connecting means ensure a homogeneous distribution of the tension along the length of the upper11. While moving in a direction I, thespring43 is tensioned.

When the moveablesole part10ahas moved into the surface of the sole10, the upper surface of the moveablesole part10aand the lower surface of the uppersole part10dabut, thereby limiting any further relative movement in the direction II. In this position, the user can walk on the shoe. In this position, the movingbody41 has travelled along a length d as indicated inFIG. 4, thereby tensioning thelace3. During a first use of the shoe1, a user can adjust the needed tension by adjusting theknot31 near the front of the shoe1. After this adjustment, the lacingtensioning mechanism4 can be used for fastening and loosening the lacing.

For preventing accidental loosening of the lace, as the movingbody41 tends to travel in a direction opposite I inFIG. 4 due to thespring43, alocking mechanism6 is arranged to interlock the uppersole part10dand the moveablesole part10a.In this example, afinger62 is arranged to engage aprotrusion61 in a snap-fit fashion. The user can unlock thelocking mechanism4 by hand or by using his other foot, thereby loosening the lacingtensioning mechanism4.

If thelocking mechanism4 is loose, lifting the heel (a movement opposite direction III inFIG. 4) will result in the movement of the movingbody41 towards theends15bof thechannels5 due to the tension in thespring43. Also the weight of the moveablesole part10amay assist in moving the movingbody41 back. Thespring43 is further sufficiently stiff to hold the movingbody41 in the position shown inFIG. 3, such that a user can efficiently step into the shoe1.

InFIGS. 5, 6 and 7 a second embodiment of thetensioning mechanism4ais shown. Also in this embodiment, thetensioning mechanism4ais provided with a movingbody41awhich is moved in the plane of theupper part10dof the sole by a pushingrod52 upon movement of the moveablesole part10aalong direction A. More specifically, upon movement of the moveablesole part10afrom the position as shown inFIG. 5, which corresponds to the loosened position of thetensioning mechanism4aalso shown inFIG. 6, towards the uppersole part10d,the pushingrod52 pushes the movingbody41ain a direction I. The pushingrod52 is hereby connected to a front part of the movingbody41a,which is further provided with arecess44 for receiving the pushingrod52 in tensioned position as will be explained later. As in the first embodiment, aspring43 is connected to the movingbody41awhich urges the moving body in a direction opposite arrow I, i.e. towards the loosened position.

In this embodiment, thelace3 is not directly coupled to the movingbody41a.

Reels

6 having rotation axes R perpendicularly to the plane of the sole and which are connected to the uppersole part10dare provided to receive the lace end. In this embodiment, thereels6 comprise twoflanges61 in between which thelace3 can be received and wound. Thereels6 are provided with aconnection62 for connecting ends of thelace3 to thereels6. Thereels6 are further provided withsprockets63 which cooperate withracks45 arranged on either sides of the movingbody41a.The movingbody41ais arranged between the tworeels6, in particular thesprockets63 thereof, and is in engagement therewith. The distance e between the twosprockets63 is sufficiently large such that pushingrod52 can be received there between and can be received in the accordingly shapedrecess44 in the tensioned position.

Movement of the movingbody41ain the direction I upon movement of thesole part10atowards the uppersole part10dwill therefore result in a rotation of thereels63 in directions indicated with IV inFIG. 6. The lace ends are connected and guided in such a way that this rotation will result in winding thelace3 on thereels6, thereby tensioning thelace3. This is schematically indicated inFIG. 7, wherein thelace end3 are shown wound up around thereels6.

In the tensioned position as shown inFIG. 7, the pushingrod52 extends substantially planar and is received in therecess44. This will result in a compact composition. Also visible inFIG. 7 is that thespring43 is elongated and biases the movingbody41aback to the position ofFIG. 6. Locking of thesole part10ato theupper part10din the tensioned position will however prevent this. Upon unlocking however, the movingbody41awill be urged towards the loosened position, thereby rotating thereels6 to unwind the lace ends3. This will release the tension in thelace3 which will allow the user to take off the shoe. In particular when the shoe is provided with elastic means for widening the shoe, this will further contribute in automatically unwinding thelace3 from thereels6.

The present invention is not limited to the embodiment shown, but extends also to other embodiments falling within the scope of the appended claims.

Claims

1. Shoe comprising:

a sole having a lower surface;

an upper provided with connecting means arranged for receiving lacing;

a lacing tensioning mechanism arranged for tensioning the lace received in said connecting means, wherein the lacing tensioning mechanism is moveable between a loose position with reduced lacing tension for easy access in the shoe and a second tensioned position wherein the lace is under tension; and

an actuator mechanism for moving the lacing tensioning mechanism between the positions, wherein actuator mechanism comprises a moveable sole part which is moveable from and into the surface of the sole and wherein the actuator mechanism is arranged for moving the lacing tensioning mechanism from the loose position to the tensioned position upon movement of the moveable sole part into the surface of the sole.

2. Shoe according toclaim 1, wherein the actuator and/or the lace tensioning mechanism is arranged outside of the space for receiving the foot of the user,

3. Shoe according toclaim 1 or2, wherein the lacing tensioning mechanism is arranged to receive a part of the lace in a moving body which is moveable to and from the connecting means for loosening and tensioning the lace, wherein the actuator is arranged to move the moving body.

4. Shoe according toclaim 3, wherein the moving body is arranged to move and is guided in a plane parallel to the surface of the sole.

5. Shoe according toclaim 4, wherein the moving body is incorporated in the sole.

6. Shoe according to any of theclaims 3-5, wherein the shoe comprises guiding means for guiding the lace from the connecting means to the moving body.

7. Shoe according to any of theclaims 3-6, wherein the moving body is biased towards the connecting means, such that the lacing tensioning mechanism is biased towards the loose position.

8. Shoe according toclaim 7, further comprising locking means arranged for locking the lacing tensioning mechanism in the tensioned position by locking the moveable sole part in the position in the surface of the sole.

9. Shoe according to any of the precedingclaims 3-8, wherein the lacing tensioning mechanism further comprises at least one reel for receiving the part of the lace, wherein the reel is arranged for tensioning and loosening said lace upon rotation, wherein the moving body is arranged for engaging said reel for rotating the reel upon movement of the moving body.

10. Shoe according toclaim 9, wherein the moving body is provided with a rack and the reel is provided with a cooperating pinion.

11. Shoe according toclaim 9 or10, wherein the lacing tensioning mechanism comprises two reels, wherein each of the reels is arranged to receive a respective end of the lace, wherein the moving body is arranged between and in engagement with the two reels.

12. Shoe according to any of theclaims 9 to11, wherein the reel is rotatably connected to a stationary part of the sole opposite the moveable sole part.

13. Shoe according to any of the preceding claims, wherein the moveable sole part is hingeably connected to a stationary part of the sole about a centrally located hinging axis.

14. Shoe according toclaim 13, wherein the moveable sole part is formed by a cut in the sole along a plane parallel to the sole.

15. Shoe according to at leastclaims 3 and13, wherein the actuator mechanism comprises a pushing rod extending between an end part of the moveable sole part opposite the hinging axis and the moving body, wherein the pushing rod is arranged for moving the moving body on movement of the moveable sole part.

16. Shoe according to any of the preceding claims, wherein the moveable sole part forms the back part towards the heel of the sole.

17. Shoe according to any of the preceding claims, wherein the connecting means for receiving lacing comprise rotatable wheels, such as pulleys, for receiving and guiding a lace.

18. Shoe according to any of the preceding claims, wherein the shoe comprises biasing means incorporated in the body of the shoe which are arranged for opening the body of the shoe for easy entry in the loose position of the lacing.

19. Shoe according toclaim 18, wherein the biasing means comprise elastic means arranged to exert an outwardly oriented elastic force on the body.

20. Shoe according toclaim 18 or19, wherein the biasing means are arranged in the body:

around the entry opening of the shoe for opening said entry opening;

around the upper for latterly moving apart the lateral sides of the upper; and/or

in a tongue for moving the tongue in a direction away from the sole.