EP0651954A1 - Fastening device for sport shoe - Google Patents

Abstract

Fastening device for a sport shoe, which has a base part (1) which can be fastened on the sport shoe and in which a cable roller (6) is connected in a rotationally fixed manner to a rotary body (17) which has a toothing (21) which interacts with a blocking device (24, 27) on the base part (1). The rotary body is furthermore loaded with an axial spring (16) and can assume a starting position (A), a central position (B) and a free-wheeling position (C) by axial mobility. The base part (1) has an intermediate ring (12) supported on it which is coupled to the rotary body (17) via a locking piece (19) and a further toothing (14), which consists of n segments each with a coil-shaped sliding flank and a locking flank, in such a manner that the spring-loaded locking piece (19), by axial movement of the rotary body (17) against the axial spring (16) into the central position (B), moves first towards the axial spring (16) along a locking flank and then along a sliding flank to the next locking flank, as a result of which the rotary body (17) rotates by a given angle and returns axially into the starting position (A). <IMAGE>

Description

The invention relates to a tensioning device for a sports shoe, in particular a ski shoe, which has a base part which can be fastened to the sports shoe, in which a rope pulley for a rope which is connected in a rotationally fixed manner to an axially movable rotating body is arranged, the rotating body having a handle in the axial direction is loaded by an axial spring and can assume an initial position due to the axial mobility, in which a toothing on the rotating body interacts with a blockage on the base part in order to prevent rotation against the pulling direction of the rope, and when the handle is pressed against the force of the axial spring can assume a freewheel position in which the blocking is released from the toothing and the rotating body can be freely rotated in both directions.

In US Pat. No. 5,001,817 and US Pat. No. 4,799,297 (Nordica), tensioning devices for ski shoes are disclosed which have a housing with a drum for receiving at least one rope, a rotary knob for tensioning the rope and an axial toothing in the axial direction with a releasable lock, this lock is formed by a special metal wing or a spring-loaded counter toothing and can be disengaged from the axial spur gear by pressing the push button.

Likewise, EP B 27 222 (Nordica) discloses a device for actuating the instep pressure element of a ski shoe with a rope that extends over the shoe in the instep area and a winding roller that is connected in a rotationally fixed manner to a button that is rotatable and axially movable on a body is mounted, wherein both the body and the button has a spur toothing and these teeth can be separated from each other by pulling the button against spring force.

Furthermore, from the publications DE-A1-3 635 168, EP-A2 + A3-56 953, WO-A1-79 / 00770, EP-A1-155 596 and EP-A2 + A3-297 342 driver and freewheel devices are also included Face gears, perforated disks, individually engaging teeth or wings or known with a plurality of gears.

According to the prior art, such tensioning devices can be relaxed in steps after the rope has been tensioned, a controlled step-by-step release of these However, devices in small steps are not possible. Furthermore, such devices must be built much more compact for practical purposes and adapted to the footwear.

It is therefore an object of the invention to enable a controlled release of a cable pull in small steps by means of a particularly compact mechanical solution.

This object is achieved in that an intermediate ring supported on the base part is coupled to the rotating body via a locking piece and a further toothing, which consists of n segments each with helical sliding flanks in the axial direction and radial locking flanks, so that by axially moving the Rotary body against the axial spring force in a middle position between the starting position and the free-standing position, the spring-loaded locking piece, which rests on a locking flank, first against the axial spring force along this locking flank and in the presence of a cable in the sequence with simultaneous movement in the direction of the axial spring force along the sliding flank moves to the next locking flank, whereby the rotating body rotates through a certain angle and axially returns to the starting position.

• Figur 1 eine schematische Explosionsdarstellung der erfindungsgemäßen Vorrichtung,
• Figur 2a einen Schnitt durch die Längsmittelachse der Vorrichtung in Explosionsdarstellung und Figur 2b diesen Schnitt durch die zusammengebaute Vorrichtung,
• Figuren 3a, 3b einen horizontalen Schnitt durch die Vorrichtung, an dem die Wirkungsweise der Klinkenverzahnung ersichtlich ist,
• Figur 4 einen horizontalen Schnitt durch die Vorrichtung, an dem die Wirkungsweise der Zwischenringverzahnung ersichtlich wird und
• Figur 5 einen Ausschnitt der erfindungsgemäßen Verzahnung an dem Zwischenring.

The invention with the advantages resulting therefrom is explained in more detail below on the basis of an exemplary embodiment which is illustrated in the drawings (FIGS. 1 to 5). In these show:

• FIG. 1 shows a schematic exploded view of the device according to the invention,
• 2a shows a section through the longitudinal central axis of the device in an exploded view, and FIG. 2b shows this section through the assembled device,
• FIGS. 3a, 3b show a horizontal section through the device, on which the mode of action of the pawl toothing can be seen,
• Figure 4 shows a horizontal section through the device, on which the mode of action of the intermediate ring toothing can be seen and
• Figure 5 shows a section of the toothing according to the invention on the intermediate ring.

According to Figures 1 and 2, the base part 1 of the device, which simultaneously represents the housing, is made in two parts with a base part 2, which is generally adapted to the shape of the shoe and can be fastened to the sports shoe, and an upper part 30, which forms the corresponding cover of the tensioning device . In the central area of the base part 2 there is a cylindrical recess 3 for receiving a rope pulley 6, which is rotatably mounted in a central bore 4 of the base part 2 by means of a cylindrical projection 8. On the two lateral flanks of the base part 2 there are grooves 5, 5 ′ for the cable 45 in the region of the central plane, which open into the cylindrical recess 3 at different axial heights and in which the cable 45 slides when the device is actuated.

The rope pulley 6, the outer diameter of which essentially corresponds to the diameter of the depression 3, has two rope grooves 7, 7 'on the cylindrical outer surface, in which two ropes 45 are fastened in a known manner at certain points on the circumference. On the side opposite the cylindrical projection 8, the cable pulley 6 has in the axial direction a central pin 9 for the rotationally fixed connection with a rotating body 17, which has a recess 23 which is a counter-structure to the pin 9 and for the rotationally fixed but axially movable coupling serves with the pulley 6, this pin 9 has a central recess 11 for receiving an axial spring 16. As can be seen in FIGS. 1 and 4, the rotationally fixed and axially displaceable coupling in the exemplary embodiment shown is realized by the hexagonal pin 9 and the precisely fitting recess 23, between which the axial spring 16 can act. Furthermore, the cable pulley 6 has an annular recess 10, the outer diameter of which corresponds at least to the diameter of the rotating body 17, since, as can be seen in FIG. 2 b, this penetrates into this recess 10 when moving against the axial spring 16.

Between the rope pulley 6 and the rotating body 17 there is an intermediate ring 12 according to the invention, which in the present exemplary embodiment has a special toothing 14 on the cylindrical inner surface with n uniform segments, each consisting of sliding flanks 114 ', 214', ..., n14 ' and blocking flanks 114 '', 214 '', ..., n14 '', whereby, as can be seen in FIG. 5, the sliding flanks 114 ', 214', ..., n14 'are tangential, helical walls and the blocking edges 114 ″, 214 ″,..., n14 ″ are radially oriented triangular surfaces lying in the axial direction. Below this internal toothing 14, the intermediate ring 12 has on the inside a flat cylindrical inner surface 12 ', the diameter of which is greater than or equal to the diameter of the rotating body 17. On the outer circumference of the intermediate ring there is also a tangentially lying recess 13 for mounting a tangential spring 15, through which the Intermediate ring 12 is resiliently supported on a correspondingly arranged nose 35 of the base part 1.

On the inner toothing 14 of the intermediate ring 12 acts according to the invention in a lateral recess 20 of the rotary body 17 spring piece 19. This essentially elongated locking piece 19 has at one end a seat 19 'for the spring force 18 acting on this locking piece and is on opposite end 19 '' beveled to adapt to the internal toothing 14. In the axial direction, this front edge 19 ″ of the locking piece 19 is essentially parallel to the front edge of a locking flank of the internal toothing 14 (see FIG. 4). In another embodiment, the locking piece 19 can also be designed as a rotatably mounted kink piece or as a self-resilient locking lug.

In a further embodiment, which is not shown here, the toothing 14 arranged on the inner surface in the exemplary embodiment shown can optionally be arranged on the outside on the intermediate ring 12, on / in the rotating body 17, or also on the base part 1, as a result of which the locking piece 19 consequently on the intermediate ring 12 or is mounted on the base part 1 in order to be able to act on the internal toothing 14 according to the invention.

The axially movable rotating body 17 also has on the cylindrical outer surface a ratchet toothing 21, which interacts with a blockage 24, 27 in such a way that rotation of the rotating body 17 and thus the rope pulley 6 in the pulling direction of the rope 45 is prevented. On the side facing away from the cable pulley 6, the rotary body has a pressure pin 22 as a handle, which is connected in a rotationally fixed manner to a rotary knob 38 mounted rotatably on the base part, but is axially displaceable with respect to the rotary knob 22.

The blocking of the pawl toothing 21 consists of one or more spring-loaded locking lugs 27 arranged along a circle, which are rotatably supported by means of axes 28 in bores 33 of the base part 1 and are loaded with an open spring ring 24 in the direction of the pawl toothing 21, the spring ring 24 passing through an opening 25 on a locking lug 34 of the base part 1 is secured against rotation. Likewise, these locking lugs 27 can also be loaded with springs of a different type, or they can be self-resilient.

The second part of the housing is formed by the upper part 30, which, like the base part 2, has flanks on both sides which cover the cable grooves 5, 5 '. In the center, the upper part 30 has an opening 37 through which the free end of the pressure pin 22 of the rotating body 17 is led out of the housing. The following recesses are provided in the housing on the underside of the upper part 30: a cylindrical recess 31 for Inclusion of the intermediate ring 12, which contains a nose 35 at one point on the circumference, on which the tangential spring 15 is mounted; a groove-shaped recess 32, which is an annular recess in the cylindrical recess 31 and serves to receive the spring ring 24, the groove 32 having at least such a width that the diameter of the spring ring, as can be seen in FIGS. 3a, 3b, is changeable according to the radial movement of the locking lugs 27. The groove 32 is broken in the effective area of the locking lugs in the radial direction inwards, so that the locking lugs 27 can engage the pawl teeth 21, and has a locking lug 34 at one point, between two locking lugs 27, by means of which the spring ring 24 is secured against rotation is. In the openings of the pill 32, in which the locking lugs 27 act, holes 33 are provided in the upper part 30 of the base part 1 along a circle, in which the axes 28 of the locking lugs are rotatably mounted.

On the upper side, the upper part 30 has an annular projection 36, on which a rotary knob 38 is rotatably mounted, which, according to the outer shape of the pressure pin 22, has a precisely fitting axial recess 39, as a result of which this pressure pin 22 is connected in a rotationally fixed manner to the rotary knob 38 but is axially displaceable is stored. In the embodiment shown here, the outer shape of the pressure pin and the precisely fitting recess 39 are hexagonal. The rotary knob 38 additionally has a funnel-shaped depression 41 in the region of this recess 39, which enables easier axial actuation of the pressure pin 22, and webs or grooves on the outer circumference, which ensure a non-slip rotation of the rotary knob.

In a further embodiment, the pressure pin 22 can be formed in one piece with the rotary knob 38, the base part 1 being divided in the axial direction along the central plane and thus no longer consisting of the base part or top part but of two approximately mirror-inverted side parts.

The mode of operation of a tensioning device according to the invention is explained in more detail below with reference to the accompanying figures, the mode of operation of the internal toothing 14 on the intermediate ring 12 in connection with the locking piece 19 of the rotating body 17 and the different axial positions of the rotating body being explained in more detail .

When the cable 45 is tensioned, the rotating body 17 is initially shown in FIG. 2b in the starting position (A), in which the locking lugs 27 are engaged in the toothing 21 of the rotating body 17 according to FIG. 3a. By turning the rotary knob 38 in a clockwise direction, the rotary body 17, which is connected to it in a rotationally fixed manner, and also rotates with it non-rotatably connected rope pulley 6, whereby optionally one or two ropes 45 sliding in grooves 5, 5 'are wound in corresponding grooves 7, 7' of the rope pulley 6. The locking lugs 27 are rotated about the axis 28 while the rotating body 17 rotates one tooth each of the internal toothing 14 and, as shown in FIG. 3b, is deflected radially outward from the respective tooth of the pawl toothing 21, as a result of which the spring ring 24 also radially extends is pushed outside. As soon as the rotating body has rotated further about a tooth of the pawl toothing 21, the locking lugs 27 snap back into the pawl toothing 21 due to the load by the spring ring 24, as can be seen in FIG. 3a, whereby the spring ring 24 also returns to its original Size maintains. Such movements of the spring ring 24 and the locking lugs 27 are brought about successively by turning the rotary knob 38 until the desired tension prevails on the cable 45.

If the device, according to the invention, is now to be relaxed step-by-step and in a metered manner, press on the pressure pin 22, as a result of which the rotary body 17 is moved into its central position B against the axial spring 16. In this central position B, the locking lugs 27 are separated from the pawl toothing 21 and the locking piece 19 lies against a locking flank 114 '' of the inner toothing 14 of the intermediate ring 12, which initially prevents the rotating body 17 from rotating counterclockwise and thus relieves the cable pull . If the rotary body is moved further against the axial spring 16 in this central position B by pressing on the pressure pin 22, the locking piece 19 slides, as indicated in FIG. 4 by the arrow X, first along this locking flank 114 ″ and subsequently according to the arrow Y along the sliding flank 114 'until the locking piece rests on the next locking flank 214' '. Due to the inventive construction of the internal toothing 14, the locking piece 19 and thus also the rotating body 17 is moved in the direction of the force of the axial spring 16, whereby the rotating body 17 returns to the starting position A, but is rotated by a certain angle. The angle of rotation by which the rotating body 17 and thus also the rope pulley 6 rotates when this mechanism is actuated once is essentially 360 / n degrees, where n is the number of segments, that is to say the number of locking or sliding flanks of the internal toothing 14 is. Such movements of the locking pin on the internal toothing 14 of the intermediate ring are successively brought about by pressing on the pressure pin 22 until the desired relief has occurred.

If the rotating body 17 is pressed against the axial spring 16 by pressing on the thrust pin 22 so that the locking piece 19 initially resting on a locking flank 114 '' of the toothing 14 no longer acts on the internal toothing 14, but only on the flat inner surface 12 'of the intermediate ring , the rotating body is in the freewheeling position C, in which the rotating body 17 and thus also the rope pulley 6 can be freely rotated in both directions and the rope is thus completely relaxed. By releasing the pressure pin 22, the rotating body 17 is returned to its starting position A, which is mechanically equivalent to the original state before the rope 45 was tensioned.

In the embodiment shown in FIGS. 1 to 5, the intermediate ring 12 is supported on the base part by means of the tangential spring 15 so that this intermediate ring 12 can be rotated by a certain angle, the size of the angle of rotation being controlled by the tangential spring 15 or the cable pull so that these two quantities are in equilibrium. As a result, the tensioning device, when the rotary body 17 is brought into the central position B, is somewhat relieved even before the release mechanism 14, 19 according to the invention comes into force. A further relief of the cable pull is subsequently achieved, as described above, by successively moving the rotating body 17 from the starting position A to the central position B by pressing the pressure pin 22. The tangential spring 15, which is in equilibrium with the cable in the central position B of the rotating body 17 and is constantly loaded, is either when the device is completely relieved, by moving the rotating body 17 into the freewheeling position C, or when the device is tensioned again, by turning the rotary knob 38 clockwise. Especially at high tensions of the rope 45, this step-by-step spring 15 enables the device to be relieved in stages in a way that is particularly gentle on the material and smooth.

Finally, it should be noted that the direction of rotation of the tensioning device can be changed by a simple mechanical reversal of the toothing and, in addition to ropes, all traction means that can be wound up and unwound, such as, for. B. cords, chains, metal, leather or plastic straps can be used.

Claims (19)

Tensioning device for a sports shoe, in particular a ski shoe, which has a base part (1) which can be fastened to the sports shoe and in which a rope pulley (6) for a rope (45) connected to an axially movable rotating body (17) is arranged, the one Handle (22, 38) having a rotating body is loaded in the axial direction by means of an axial spring (16) and, due to the axial mobility, can assume a starting position (A) in which a toothing (21) on the rotating body (17) with a block (24, 27) cooperates on the base part (1) in order to prevent rotation against the pulling direction of the rope (45) and, when the handle (22, 38) is pressed against the force of the axial spring (16), can assume a freewheeling position (C), in which the blocking (24, 27) is released from the toothing (21) and the rotating body (17) can be freely rotated in both directions, characterized in that an intermediate ring (12) supported on the base part (1) with the rotating body (17 ) above a locking piece (19) and a further toothing (14) consisting of n segments with helical sliding flanks (114 ', 214', ..., n14 ') and radial locking flanks (114'',214')', ..., n14''), is coupled so that by axially moving the rotating body (17) against the axial spring force (16) into a central position (B) between the starting position (A) and the freewheeling position (C) the spring-loaded locking piece (19), which rests on a locking flank (114 ''), initially against the axial spring crest (16) along this locking flank and, if a cable is present, subsequently along with movement in the direction of the axial spring force (16) the sliding flank (114 ') moves to the next locking flank (214''), whereby the rotating body rotates by a certain angle and axially returns to the starting position (A). Device according to claim 1, characterized in that the base part (1) is designed as a two-part housing with a base part (2) which can be fastened to the sports shoe and an upper part (30). Device according to claim 1 or 2, characterized in that the base part (1) is curved to adapt to the shape of the sports shoe. Apparatus according to claim 2 or 3, characterized in that the base part (2) of the base part (1) has a cylindrical recess (3) for receiving the cable pulley (6) and a bore (4) for rotatably supporting a cylindrical projection (8) Has pulley (6). Device according to one of claims 2 to 4, characterized in that the base part (2) of the base part (1) has a groove (5) for the cable (45) which opens into the cylindrical recess (3) of the base part (2) . Device according to one of claims 2 to 4, characterized in that the base part (2) of the base part (1) has rope grooves (5, 5 ') on both sides of the cylindrical recess (3) which extend into the recess (at different axial heights). 3) open. Apparatus according to claim 6, characterized in that the cable pulley (6) has two grooves (7, 7 ') for winding / unwinding two cables (45) with an axial position such that the cables (45) into corresponding grooves (5, 5 ') slide. Device according to one of claims 1 to 7, characterized in that the cable pulley (6) has a central pin (9) for positive connection with a recess (23) of the rotating body (17) and this pin (9) has an axial recess (11 ) for receiving the axial spring (16), which acts between the rotating body (17) and the pulley (6). Device according to one of claims 1 to 8, characterized in that the cable pulley (6) on the side facing the rotating body (17) has an annular recess (10) whose outer diameter is greater than or equal to the diameter of the rotating body (17). Device according to one of claims 1 to 9, characterized in that the toothing (14) on the inner surface of the intermediate ring (12) and the locking piece (19) is arranged laterally on the rotating body (17). Apparatus according to claim 10, characterized in that the rotary body (17) has a lateral recess (20) for receiving a spring (18) loading the locking piece (19) and for partially receiving the locking piece (19). Device according to one of claims 1 to 11, characterized in that the locking piece (19) has a cylindrical pin (19 ') as a seat for the spring (18) loading the locking piece. Device according to one of claims 1 to 12, characterized in that the locking piece (19) on the side facing away from the spring seat (19 ') has a chamfered end (19'') adapted to the toothing (14). Device according to one of claims 1 to 13, characterized in that the intermediate ring (12) can be rotated with respect to the base part (1) against a tangential spring force (15) by a certain angle. Apparatus according to claim 14, characterized in that the intermediate ring (12) has a tangential recess (13) which is assigned to a nose (35) of the base part (1) for mounting the tangential spring force (15). Device according to one of claims 1 to 15, characterized in that the rotating body (17) has a pawl toothing (21) arranged along the circumference, which in the starting position (A) of the rotating body (17) has one or more arranged along a circle Locking lugs (27) are secured against rotation of the rotating body (17) in the pulling direction of the cable (45), the locking lugs (27) being mounted in bores (33) of the base part (1) by means of axes (28) and by an open spring ring ( 24), which is secured against rotation by a catch (34) of the base part (1), are loaded in the direction of the pawl teeth (21). Device according to one of claims 1 to 16, characterized in that the axially movable rotary body (17) has as a handle a pressure pin (22), which is rotatably and axially at its free end by means of a recess (39) of a rotary knob (38) is slidably mounted. Apparatus according to claim 17, characterized in that the rotary knob (38) has a funnel-shaped depression (41) in the region of the recess (39) on the upper side for easier actuation of the pressure pin (22). Device according to one of claims 17 or 18, characterized in that the rotary knob (38) has an annular recess (42) on the underside, through which the rotary knob (38) on an annular projection (36) of the upper part (30) of the base (1) is rotatably mounted.

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