EP0632699B1 - Press-device for securing laces - Google Patents

Abstract

PCT No. PCT/EP93/00715 Sec. 371 Date Sep. 2, 1993 Sec. 102(e) Date Sep. 2, 1993 PCT Filed Mar. 24, 1993 PCT Pub. No. WO93/18678 PCT Pub. Date Sep. 30, 1993.A snap fastener for securing shoe laces comprises two openings disposed diametrically to each other through which the shoe laces are passed. The openings extend longitudinally through the snap fastener when the latter is opened. An inner sleeve is in a larger outer sleeve such that it is longitudinally movable relative thereto. The inner sleeve accommodates an inner ring. When the pressure is exerted on the outer sleeve, the ring is made to rotate as the longitudinal movement is converted into a horizontal circular movement so that the shoe laces are immovably clamped by the snap fastener.

Description

The invention relates to a push button for locking laces.

Especially for kindergarten children who have not yet learned how to lace shoelaces on their own would be a device that makes shoe lacing unnecessary. Proposals for such a device are described in EP 0 314 628 A2, FR 1,518,038 and US 3,500,508, US 3,345,707 and US 948,071. The present invention has for its object to provide an improved and even easier to use such device.

This object is achieved according to the invention by a push button for locking laces, which is characterized by the following features:
an inner sleeve is guided in an outer sleeve so that they are movable substantially perpendicular to each other;
the inner socket houses an internal, rotatably mounted body;
means are provided which cause the body to rotate when there is a relative displacement between the inner sleeve and the outer sleeve;
at least one opening allows the laces to be passed through;
each opening is formed by a bore penetrating the inner bush, the body and the outer bush;
the holes associated with each opening of the inner sleeve, the body and the outer sleeve are aligned with one another when the push button is in the unlocking position, so that the shoelace can be carried out freely;
a relative displacement between the inner sleeve and the outer sleeve from the unlocking position causes a displacement of the holes, which stuck the shoelace immovably;
Preferably, two mutually offset openings are provided for the passage of one shoelace end.

The push button according to the invention also prevents the laces from loosening themselves. The circular movement of the inner ring ensures that the laces are securely jammed.

The push button according to the invention allows quick and easy locking of laces on all types of shoes, in particular on children's shoes.

After the lacing of shoes has proven itself for thousands of years, but until now no absolutely reliable method of lacing and easy releasing has been known, the solution described here offers the possibility of permanently locking and releasing the laces on shoes with a simple hand movement .

By knotting the ends of the shoelaces, the push button can be secured against unintentional sliding out of the shoelaces.

The push button is advantageously designed such that two mutually offset openings are provided for Implementation of one shoelace end, preferably at least one offset of the shoelace ends when the inner bushing and outer bushing are pressed together, which ends when the inner bushing and outer bushing are pulled apart again. Expediently, when the outer sleeve is pressed, the body is rotated by transmitting the vertical movement in a horizontal circular movement, so that the push button firmly locks the shoelaces, while the jamming is released again by pulling gently upwards.

According to a preferred embodiment of the invention, the inner body has at least one surface which is beveled with respect to its axis of rotation, the bevel of which extends essentially in the circumferential direction of the body. A projection is provided opposite the beveled surface, which slides on the beveled surface when the inner bushing and outer bushing are displaced relative to one another and thereby rotates the body. The beveled surface preferably starts from a side of the body which is essentially perpendicular to the axis of rotation of the body.

In a particularly preferred embodiment, the body has two beveled surfaces, each of the beveled surfaces being opposite a projection. The projections are expediently attached to the inner surface of the bushing, which lies opposite the beveled surface, preferably on the inside of the outer bushing.

According to a development of the invention, means are provided which limit the maximum displacement of the two sockets. Other means advantageously prevent twisting between the inner socket and the outer socket.

The rotatably mounted body is expediently in operative connection with at least one spring which counteracts the rotation of the body caused by the relative movement between the inner sleeve and the outer sleeve during the locking process or causes a return when the locking is released.

A particularly simple construction results if the inner bush and the outer bush are circular cylindrical and the rotatably mounted body has a circular cylindrical circumferential surface which is guided by the inner wall of the inner bush, the rotatably mounted body preferably being designed as a ring. If, in addition, at least one of the bushings is provided with an axially extending hub, around the outside of which the ring is rotatably mounted, a particularly stable mounting is obtained, which ensures reliable rotation of the ring. If, in addition, according to a further embodiment of the invention, one of the sockets preferably has an axially extending projection in the middle thereof, which is guided displaceably in a cylindrical recess which is provided in an axially extending projection of the other socket, the push button is of a particularly stable construction , which facilitates its operation. The axially extending projection provided with the cylindrical recess is preferably designed as a central hub, which guides the ring or causes the spring to be held.

The most effective clamping effect is achieved if the bores pass through the rotatably mounted body parallel to its axis of rotation, since each end of the shoelace then undergoes a 360 ° wrap.

In order to counteract tilting of the rotatably mounted body, the bores for the passage of the shoelaces preferably penetrate the rotatably mounted body on diametrically opposite sides. For the same reason, the beveled surfaces are preferably arranged diametrically opposite one another, whereby they are advantageously mirror-symmetrical to one another.

According to a preferred embodiment, the bores which pass through the rotatably mounted body and the beveled surfaces which are arranged thereon are offset with respect to one another by approximately 90 ° with respect to its axis of rotation.

In a particularly preferred development of the invention, a cover plate is provided between the rotatably mounted body and the outer bush, which is held on the inner bush and has bores which are aligned with the bores of the outer bush and thus allow the laces to be passed through. The cover plate also expediently has openings which lie above the beveled surfaces of the rotatably mounted body, so that projections on the outer bushing can act on the beveled surfaces so as to rotate the rotatably mounted body for the purpose of locking the laces. The circular movement of the inner, rotatably mounted body pulls the shoelaces in joints between the inner surface of the inner sleeve and the rotatably mounted body and between this and the inner surface of the cover plate, where they are clamped.

So that the joints and thus the play between the moving parts can be kept small, shallow troughs, in which the shoelace ends can be clamped, preferably join in the end region of the bores of the rotatably mounted body, contrary to the direction of rotation assumed during the locking process. If areas of the troughs are additionally provided with a friction-increasing surface, the clamping effect is further improved.

The push button is particularly easy to operate if the outer socket contains a protruding grip area.

The mold production for the components, which are preferably injection molded, is particularly simple if the push button has a cylindrical shape. This also contributes to the fact that the push button can be manufactured with good stability and with minimal material expenditure.

According to an additional variant of the invention, the free ends of the shoelaces are detachably held in shaped pieces which are larger than the openings in order to prevent the shoelaces from being unintentionally pulled out of the push button. The shaped pieces preferably have a through hole, and an additional hole adjacent to one end of the through hole, into which the free end of the shoelace end guided through the through hole can be inserted.

According to a further aspect of the invention, a push button for locking laces is created, which has the following features:
the push button has a cylindrical shape;
the laces are passed through two openings arranged diametrically to one another;
the openings go through it vertically when the push button is open;
an inner socket is guided in a larger, outer socket so that it can be moved perpendicularly thereto;
the inner socket houses an inner ring;
when the outer sleeve is pressed, the ring is rotated by transmitting the vertical movement in a horizontal circular movement, so that the push button firmly locks the shoelaces, while the pull is released again by pulling slightly upwards.

The locking of the shoelaces is particularly secure if an intermediate cover plate is provided, the circular movement of the inner ring pulling the clamped shoelaces into joints between the inner circular surface of the inner bush and the inner circular surface of the cover plate.

According to a preferred development of the invention, the inner ring has two chamfered openings, while two pins are provided on the outer sleeve, which act on the chamfered openings when the outer sleeve is pressed and transmit the vertical movement into a horizontal circular movement of the inner ring .

Fig. 1

zeigt eine Draufsicht auf eine kreiszylindrische innere Buchse, welche das Unterteil des Druckknopfs bildet;

Fig. 2

zeigt einen Schnitt längs der Linie II-II von Fig. 1 durch die innere Buchse der Fig. 1.

Fig. 3

zeigt eine Draufsicht auf die Unterseite einer kreiszylindrischen äußeren Buchse mit größerem Durchmesser, in welcher die in den Fig. 1 und 2 gezeigte innere Buchse senkrecht verschiebbar geführt ist, wobei mit senkrecht hier die Richtung des Pfeils D in Fig. 2 und 4 verstanden wird;

Fig. 4

zeigt einen Schnitt längs der Linie IV-IV von Fig. 3 durch die äußere Buchse der Fig. 3;

Fig. 5

zeigt in Draufsicht einen innenliegenden Ring, der von der inneren Buchse aufgenommen wird und gegenüber dieser drehbar ist;

Fig. 6

zeigt eine Seitenaufsicht auf den in Fig. 5 dargestellten innenliegenden Ring in Richtung des Pfeiles VI von Fig. 5;

Fig. 7

zeigt ein Deckplättchen, das in die innere Buchse nach Einbringen des Rings eingepaßt ist;

Fig. 8

zeigt einen Schnitt längs der Linie VIII-VIII von Fig. 7 durch das in Fig. 7 gezeigte Deckplättchen;

Fig. 9

zeigt in perspektivischer Darstellung den aus den in Fig. 1 bis 8 dargestellten Bauelementen zusammengesetzten Druckknopf im Betrieb mit eingefädelten Schnürsenkeln und an deren Enden angebrachten Formstücken, wobei in Fig. 9A der Druckknopf in einer Stellung wiedergegeben ist, bei der die Schnürsenkel frei verschiebbar sind, und wobei in Fig. 9B der Druckknopf in einer Stellung wiedergegeben ist, bei der die Schnürsenkel mittels je einer 360°-Umschlingung arretiert sind;

Fig. 10

zeigt in perspektivischer Explosionsdarstellung den Druckknopf mit durchgeführten Schnürsenkeln, wobei in Fig. 10A die Fig. 9A entsprechende Betriebsstellung und in Fig. 10B die Fig. 9B entsprechende Betriebsstellung wiedergegeben sind;

Fig. 11-14

zeigen Schnittdarstellungen durch den zusammengebauten Druckknopf, wobei die Fig. 11 und 12 der in Fig. 9A und Fig. 10A wiedergegebenen Betriebsstellung und die Fig. 13 und 14 der in Fig. 9B und Fig. 10B wiedergegebenen Betriebsstellung entsprechen.

The accompanying drawings and the following description serve to further explain the invention. Figures 1 to 8 show the individual parts of a preferred embodiment of the push button according to the invention, while Figures 9 to 14 illustrate their interaction.

Fig. 1

shows a plan view of a circular cylindrical inner sleeve, which forms the lower part of the push button;

Fig. 2

shows a section along the line II-II of FIG. 1 through the inner socket of FIG. 1st

Fig. 3

shows a plan view of the underside of a circular cylindrical outer sleeve with a larger diameter, in which the inner sleeve shown in Figures 1 and 2 is guided vertically displaceable, with the direction of arrow D in Figures 2 and 4 is understood to be perpendicular here;

Fig. 4

shows a section along the line IV-IV of Figure 3 through the outer socket of Fig. 3.

Fig. 5

shows a plan view of an inner ring which is received by the inner sleeve and is rotatable relative to this;

Fig. 6

shows a side view of the inner ring shown in Fig. 5 in the direction of arrow VI of Fig. 5;

Fig. 7

shows a cover plate which is fitted into the inner sleeve after insertion of the ring;

Fig. 8

shows a section along the line VIII-VIII of Figure 7 by the cover plate shown in Fig. 7.

Fig. 9

1 shows a perspective view of the push button composed of the components shown in FIGS. 1 to 8 in operation with threaded laces and fittings attached to their ends, the push button being shown in FIG. 9A in a position in which the laces are freely displaceable, and wherein in Fig. 9B the push button is shown in a position in which the Shoelaces are locked by means of a 360 ° loop;

Fig. 10

shows a perspective exploded view of the push button with laces passed through, in FIG. 10A the operating position corresponding to FIG. 9A and in FIG. 10B the operating position corresponding to FIG. 9B are shown;

Fig. 11-14

show sectional views through the assembled push button, wherein FIGS. 11 and 12 correspond to the operating position shown in FIGS. 9A and 10A and FIGS. 13 and 14 correspond to the operating position shown in FIGS. 9B and 10B.

The figures show an exemplary embodiment of a push button 1, the external view and mode of operation of which is shown in FIGS. 9A and 9B.

The push button 1 contains a circular cylindrical inner socket 2 and a circular cylindrical outer socket 3, which is slidably guided on the outside on the inner socket 1 so that the sockets 2 and 3, as indicated by the arrow D, can be pushed together and pulled apart. The push button 1 contains, with respect to its longitudinal axis, which coincides with the arrow D in the case shown, two diametrically opposite openings 4 and 5, through which the ends 6 and 7 of a shoelace 8 are passed, which when the in the Fig. 9A, 10A and 11, 12 shown operating state of the push button 1, as indicated in FIG. 9A with dashed lines, straight and loosely penetrates the push button, and this when taking the operating state shown in FIGS. 9B, 10B and 13, 14, as in Fig. 9B with dashed lines indicated, two cranked passes through the push button 1, so that each end 6, 7 of the laces in the area of the push button 1 undergoes a 360 ° wrap.

The free ends 6, 7 of the shoelace 8 carry shaped pieces 9 and 10, which contain a through hole 11 and a further hole 12, which is provided adjacent to one end of the through hole 11 and makes it possible to in each case the tip of the inserted through the through hole 11 Insert the shoelace ends 6 or 7 after a bend of approximately 180 °, so that the shaped pieces lock them after the ends have been pulled back. This prevents unintentional removal of the push button 1. This can alternatively also be achieved without the fittings 9, 10 if the ends 6 and 7 are provided with a knot, but this is not shown in the drawings.

The details of the push button are explained in more detail below.

As can be seen from FIGS. 1 and 2, the inner bushing 2 contains a circular disk-like base 13 which, as indicated by the reference number 14, is retracted on the outside in the manner of a plate. On the inside of the base 13, and set back from its edge 15, a circular-cylindrical side wall 16 is fastened in one piece, as well as a circular-cylindrical hub 17, at least in its lower region. The side wall 16 and the hub 17 are arranged concentrically with one another, their central axis defines the central axis of the push button. On the upper edge of the ring-shaped pot formed by the side wall 16, the top of the base 13 and the top of the hub 17, there is a circumferential groove 18, 19 at the same height on the inside of the side wall 16 and on the outside of the hub 17. into which a cover plate 20 shown in FIGS. 7 and 8 can be pressed, which closes the pot at the top.

The hub 17 also contains in the region of its upper end a lateral flattening 21 which, in cooperation with a correspondingly shaped central recess 22 in the cover plate 20, prevents its rotation about the central axis.

The hub also contains a longitudinal slot 23, into which the free end of a leaf spring 24 can be inserted, with which a circular ring 25 shown in FIGS. 5 and 6 is provided, which is received in the pot of the inner bush 2.

The hub 17 contains in its interior a cavity 26 which extends over its entire length and has a square cross section, which is narrowed at the upper end by a collar 27. In the cavity 26, a pin 28 protruding in a protruding manner centrally on the inside of the outer bush 3 shown in FIGS is. The collar 27 in cooperation with the bead 29 prevents the pin 28 from being pulled out of the cavity 26 as soon as the pin 28 overcomes the elastic deformability of the material forming the bead 29 and the collar 27, and through a broken upper edge 30 of the pin 28 assists in the assembly of the push button 1 in the cavity 26 is pressed. The collar 27 and the bead 29 thus prevent the push button 1 from being pulled apart via the open position shown in FIG. 9A.

All components of the push button are preferably made of plastic.

In the bottom 13 of the inner bushing, two through bores 31, 32 are also made at diametrically opposite points in the area of the pot and adjacent to its side wall 16, which form the entrance to the openings 4 and 5.

The outer sleeve 3 shown in FIGS. 3 and 4 consists of a circular cover 33, which is integrally provided on its inside with a recessed, circular cylindrical side wall 34 which, as can be seen in particular from FIGS. 9A and 11, along the outside cylindrical side wall 16 of the inner socket 2 is displaceable. In the preferred example shown, the side walls 16 and 34 are of equal height, which results in optimal guidance and prevents dirt from entering the inside of the push button.

In the cover 33 there are further bores 35, 36 which define the exit of the openings 4, 5 and are aligned with the openings 31, 32 when the bushings 2 and 3 are assembled as described above. Approximately orthogonal to the plane connecting the bores 35, 36 in the middle, with reference to the direction of rotation of the ring 25 indicated by the arrow 37 during the locking process, rear flanks 38, 39 of pins 40, 41 begin to protrude parallel to the central axis of the push button 1 protrude from the inside of the circular cover 33 and their front end faces 42, 43 point to the upper edge region of beveled surfaces 44, 45 on the edge region of the circular ring 25 when the operating state shown in FIGS. 9A, 10A and 11, 12 is assumed Limit openings 46, 47 on one side. The length of the pins 40, 41 is dimensioned such that when the bushes 2, 3 are pushed together in the direction of the operating state shown in FIGS. 9B, 10B and 13, 14 they slide along the beveled surfaces 44, 45 until they slide into an end position get where they are lie in the continuous area of the openings 46, 47 in front of the beveled surface 44, 45. The beveled surfaces 44, 45 merge into a step 48 at the lower end, which on the one hand prevents the material of the ring 25 from being weakened there too much, and on the other hand ensures that, as can be seen in FIG. 14, the pins 40, 41 rest with their rear flank 38, 39 on the step 48 when the push button 1 assumes the locking position. This creates a lock that prevents the disk 25 from being rotated against the arrow 37 when the shoelace 8 is pulled before the pins 40, 41 are retracted.

The circular ring 25 shown in FIGS. 5 and 6 has a circular cylindrical outer surface 49 which is interrupted only by the openings 46, 47 and partly by the beveled surfaces 44, 45. Their outer diameter corresponds almost to the inner diameter of the circular cylindrical side wall 16 of the inner sleeve 2. The ring 25 further contains a continuous inner bore 50, the diameter of which is larger than the outer diameter of the hub 17, so that 25 space for the between the hub 17 and the ring Leaf spring 24 remains, which surrounds the hub in a circular arc and, as described above, can be inserted with its free end into the longitudinal slot 23. The spring 24 is attached and dimensioned such that when it is held in the longitudinal slot 23 in the relaxed state, it supports the ring 25 in an angular position relative to the inner bush 2, in which the pins 40, 41, as shown in FIGS. 11 and 12 , lie against the upper end of the beveled surfaces 44, 45. The ring 25 also contains these perpendicular through holes 51, 52, which are offset by approximately 90 ° to the position of the tapered surfaces 44, 45, such that they are with the holes 31 and 32 of the inner sleeve 2 and the holes 35, 36 of the outer socket 3 are aligned when the push button 1 is shown in FIGS. 9A, 10A and 11, 12 shown operating position. The holes 51, 52 are not shown in FIG. 6 for reasons of clarity. In the end area of the bores 51, 52, these expand against the direction of rotation 37, which is adopted during the locking process, into flat troughs 53, 54 and 53a, 54a, which are provided with a friction-increasing corrugation 55 in the front area adjacent to the bores. When the push button is locked, the laces 8 are pressed into joints which arise between the bottom 13 of the inner bush 2 and the opposite lower troughs 53a, 54a and between the cover plate 20 and the upper troughs 53, 54, which is most clearly shown in FIG. 14 emerges.

The pins 40, 41 engage through recesses 56, 57 on the edge of the cover plate 20, which further has bores 58, 59, which with the bores 31, 32 of the inner sleeve 2, the bores 35, 36 of the outer sleeve 3 and Taking the operating state shown in FIGS. 9A, 10A and 11, 12 with the bores 51, 52 of the ring 25 are aligned.

The individual parts are assembled in such a way that the push button 1 in the open state, in which the outer bush 3 is not completely pushed over the inner bush 2, has the bores 31, 32 or 35, 36 or 51, 52 lie vertically, ie in the direction of arrow D, one above the other, so that the ends 6, 7 of the shoelace 8 are freely insertable through these holes. When a finger is pressed on the top of the push button 1, ie on the top of the outer socket 3, the two vertical pins 40, 41 arranged in the socket 3 act on the chamfered openings of the inner ring 25. This causes the ring 25 to rotate , wherein the vertical movement of the pins 40, 41 in a horizontal circular movement of the ring 25 in the direction of Arrow 37 is implemented. This circular movement of the inner ring 25 pulls the laces in joints between the inner circular surface of the cover plate 20 and between the inner ring 25 and the inner sleeve 2, whereby the shoelace 8 is firmly clamped and immovably locked. This rotation of the ring 25 simultaneously tensions the spring 24. By gently pulling on a grip area 60 of the outer socket 3, which is formed by the protruding edge of the circular cover 33, the pins 40, 41 are withdrawn and the locking device released, so that the Ring 25, against the direction indicated by arrow 37, can be rotated into the unlocking position. The rotary movement is initiated by pulling on the shoelace 8 and / or the tension of the spring 24.

Claims (29)

1. Snap fastener (1) for securing shoe laces (8), characterized by the following features:
   an inner sleeve (2) is guided in an outer sleeve (3) so that the sleeves are substantially movable vertically to each other;
   the inner sleeve (2) accommodates an inner body (25) which is rotatably mounted;
   means (40, 41; 44-48) are provided which effect rotation of the body 25 upon relative movement between the inner sleeve (2) and the outer sleeve (3);
   at least one opening (4; 5) permits the shoe lace (8) to be passed therethrough;
   each opening (4; 5) is formed by a borehole (31, 35, 51; 32, 36, 52) extending through the inner sleeve (2), the body (25) and the outer sleeve (3);
   the boreholes (31, 35, 51; 32, 36, 52) of the inner sleeve (2), the body (25) and the outer sleeve (3) associated with each of said openings are in alignment with each other when the snap fastener (1) assumes the unlocking position so that the shoe lace (8) can be readily passed therethrough;
   a relative movement between the inner sleeve (2) and the outer sleeve (3) from the unlocking position effects the displacement of the boreholes (31, 35, 51; 32, 36, 52), whereby the shoe lace (8) is immovably clamped.
2. Snap fastener according to claim 1, characterized in that two openings (4; 5) offset relative to each other are provided for one shoe lace end portion (6, 7) each to be passed therethrough, the shoe lace end portions (6, 7) being bent at right angles at least once when the inner sleeve (2) and the outer sleeve (3) are pressed together, said bending being reversed when the inner sleeve (2) and the outer sleeve (3) are pulled apart again.
3. Snap fastener according to claim 1 or 2, characterized in that, when pressure is exerted on the outer sleeve (3), the body (25) is made to rotate as the vertical movement is converted into a horizontal circular movement so that the shoe lace (8) is immovably clamped by the snap fastener (1), while said clamping can be released upon a slight upward drawing action.
4. Snap fastener according to one of the preceding claims, characterized in that the inner body (25) comprises at least one surface (44; 45) bevelled relative to the axis of rotation of the body, said bevel substantially extending in the circumferential direction of the body (25), and that a projection (40; 41) is provided opposite the bevelled surface (44; 45), said projection sliding on the bevelled surface (44; 45) upon relative movement of the inner sleeve (2) and the outer sleeve (3) towards each other, whereby the body (25) is rotated.
5. Snap fastener according to claim 4, characterized in that the bevelled surface (44; 45) starts from a side of the body extending substantially vertically to the axis of rotation of the body (25).
6. Snap fastener according to claim 4 or 5, characterized in that the body (25) comprises two bevelled surfaces (44; 45), and that a projection (40; 41) is disposed opposite each of the bevelled surfaces (44; 45).
7. Snap fastener according to one of claims 4 to 6, characterized in that the projections (40; 41) are disposed on the inner surface of the sleeve (3) opposite the bevelled surface.
8. Snap fastener according to one of the preceding claims, characterized in that means (27, 29) are provided which limit the maximum extent to which the two sleeves (2, 3) can be moved apart.
9. Snap fastener according to one of the preceding claims, characterized in that means (26, 28) are provided which prevent a turning movement between the inner sleeve (2) and the outer sleeve (3).
10. Snap fastener according to one of the preceding claims, characterized in that the rotatably mounted body (25) is operatively connected with at least one spring (24) counteracting a turning movement of the body (25) caused by the relative movement between the inner sleeve (2) and the outer sleeve (3).
11. Snap fastener according to one of the preceding claims, characterized in that the inner sleeve (2) and the outer sleeve (3) have a circular cylindrical shape, and that the rotatably mounted body (25) comprises a circular cylindrical circumferential surface (49) guided by the inner wall of the inner sleeve (2).
12. Snap fastener according to one of the preceding claims, characterized in that the rotatably mounted body (25) is designed as a ring.
13. Snap fastener according to claim 12, characterized in that at least one of the sleeves (2) is provided with an axially extending hub (17) around the outside of which the ring (25) is rotatably mounted.
14. Snap fastener according to one of the preceding claims, characterized in that one of the sleeves (3) comprises an axially extending projection (28) which is displaceably guided in a cylindrical recess (26) provided in an axially extending projection (17) of the other sleeve (2).
15. Snap fastener according to claim 14, characterized in that the axially extending projection (17) provided with the cylindrical recess (26) is designed as a central hub.
16. Snap fastener according to one of the preceding claims, characterized in that the boreholes (51, 52) extend through the rotatably mounted body (25) parallel to the axis of rotation of said body.
17. Snap fastener according to one of the preceding claims, characterized in that the boreholes (51, 52) through which the shoe lace end portions (6; 7) are passed extend through the rotatably mounted body (25) on diametrically opposed sides.
18. Snap fastener according to one of claims 6 to 17, characterized in that the bevelled surfaces (44; 45) are diametrically opposite and mirror symmetrical to each other.
19. Snap fastener according to one of the preceding claims, characterized in that the boreholes (51, 52) extending through the rotatably mounted body (25) and the bevelled surfaces (44; 45) arranged on said body are offset, in relation to the axis of rotation of said body, by about 90° relative to each other.
20. Snap fastener according to one of the preceding claims, characterized by a small cover plate (20) which is disposed between the rotatably mounted body (25) and the outer sleeve (3) and which is held at the inner sleeve (2) and comprises boreholes (58, 59) in alignment with the boreholes (35, 36) of the outer sleeve (3).
21. Snap fastener according to claim 20, characterized in that the small cover plate (20) comprises through-holes (56, 57) which are arranged above the bevelled surfaces (44; 45) of the rotatably mounted body (25) when said body assumes the unlocking position.
22. Snap fastener according to claim 20 or 21, characterized in that the threaded shoe laces (8) are drawn into joints between the inner surface of the inner sleeve (2) and the rotatably mounted body (25) and between said body and the inner surface of the small cover plate (20) and clamped by the circular movement of the rotatably mounted inner body (25).
23. Snap fastener according to one of the preceding claims, characterized in that flat depressions (53, 54; 53a, 54a) are provided in the end portion of the boreholes (51, 52) of the rotatably mounted body (25) against the direction of rotation (D) taken in the securing operation, in which depressions the shoe lace end portions (6, 7) can be clamped.
24. Snap fastener according to claim 23, characterized in that portions of the depressions (53, 54; 53a, 54a) are provided with a friction-increasing surface (55).
25. Snap fastener according to one of the preceding claims, characterized in that the outer sleeve (3) comprises a protruding gripping portion (60).
26. Snap fastener according to one of claims 6 to 25, characterized in that the rotatably mounted body is designed as an inner ring (25) comprising two bevelled through-holes (44, 45; 46, 47), and that two pins (40; 41) are provided on the outer sleeve (3) which act on the bevelled through-holes when pressure is exerted on the outer sleeve and convert the vertical movement into a horizontal circular movement of the inner ring (25).
27. Snap fastener according to one of the preceding claims, characterized in that it has a cylindrical shape.
28. Snap fastener according to one of the preceding claims, characterized in that the free shoe lace ends are detachably held in shaped parts (9; 10) which are larger than the openings (4; 5) so as to prevent the shoe laces (8) from being inadvertently withdrawn from the snap fastener (1).
29. Snap fastener according to claim 28, characterized in that the shaped parts (9; 10) comprise a through-bore (11) and another borehole (12) adjacent the one end of the through-bore (11), into which borehole the free end of the shoe lace end portion (6, 7) threaded through the through-bore (11) can be inserted.

Images