Bar for kite surfing with a system for trimming a kite

Abstract

The present invention relates to a bar (10) for kite surfing, wherein the bar (10) has a system for trimming a kite (100) that can be connected to the bar (10) via a left control line (1), which can be controlled using a left end of the bar (10), and via a right control line (4), which can be controlled using a right end of the bar (10), wherein within the bar (10) a winding element (15), which can be activated from the left or right end of the bar (10), is arranged for the synchronous winding and unwinding of a respective trim portion of the left control line (1) and of the right control line (4), wherein the winding element (15) is mounted movably in the bar (10) such that on activation it rotates within the bar (10) and moves axially such that the respective trim portion of the left control line (1) and of the right control line (4) is wound onto the winding element (15) with a winding diameter that remains constant over its length.

Description

Title: SYSTEM FOR TRIMMINg A KITE WITH LINEAR CONTROL Alder winding Description

[0001] The present invention relates to a kitesurfing bar with a kite trimming system. As an alternative to kitesurfing, the bar can also be used for kitesurfing on land, snowboarding with a kite, or beach sailing with a kite.

[0002] Typically, a kitesurfer is connected to the kite with a harness via front lines. The front lines are attached to the front of the kite and converge for attachment so that they can be hooked onto the kitesurfer's harness. The kite is controlled with a bar that runs across the front lines within easy reach of the kitesurfer's chest and has a cutout in the middle that runs across the bar's long axis, through which the front lines are fed. The left end of the bar is connected to the kite via a left control line, also called the left back line. The right end of the bar is connected to the kite via a right control line, also called the right back line. The left control line is used to pull the left rear end of the kite, and the right control line is used to pull the right rear end of the kite.

[0003] The force with which the kite pulls the kitesurfer depends on the wind strength and the angle of the kite to the wind. The kitesurfer has no influence on the wind strength. However, the kitesurfer can influence the kite's direction of travel by steering the kite. REPLACEMENT SHEET (RULE 26) and by trimming the kite, you can change the angle of the kite to the wind as desired. In very strong winds, trimming can reduce the kite's surface area exposed to the wind, which is also known as depowering. In lighter winds, trimming can increase the surface area exposed to the wind, which is also known as powering.

[0004] Typically, the front lines are shortened for depowering and lengthened for powering. When depowering, the kitesurfer pulls the front of the kite down, reducing the surface area exposed to the wind. Trimming via the front lines has several disadvantages. First, 80% to 90% of the pulling force is applied via the front lines, requiring a pulley system on the front lines. This pulley system is less precise and difficult to operate while kitesurfing. It also obstructs the kitesurfer's field of vision.

[0005] EP 2 766 256 B1 discloses a kite trimming system that avoids trimming via the front lines. Instead, the kite is trimmed via the control lines. This eliminates the need for a pulley system on the front lines. However, the trimming system of EP 2 766 256 B1 also has several disadvantages. Because both the left and right control lines must be wound onto at least one spool at one end of the bar, one of the control lines must be guided completely through the bar to the other end of the bar. Furthermore, the trimming travel and trimming force increase the more fully one spool is wound.

[0006] The object of the present invention is therefore to provide a kitesurfing bar with a system for trimming a kite, which on the one hand does not require a pulley system for trimming via the front lines. and on the other hand enables a constantly adjustable trim travel.

[0007] This object is achieved with a bar and a system for trimming a kite according to the independent claims. Preferred embodiments of the invention can be found in the description, the subclaims, and the drawings.

[0008] According to the invention, a bar for kitesurfing is provided, wherein the bar has a system for trimming a kite, which can be connected to the bar via a left control line, which can be controlled with a left end of the bar, and via a right control line, which can be controlled with a right end of the bar, wherein a winding element, which can be actuated from the left or right end of the bar, is arranged within the bar for synchronously winding and unwinding a respective trim section of the left control line and the right control line, wherein the winding element is movably mounted in the bar such that, when actuated, it rotates within the bar and moves axially in the process, so that the respective trim section of the left control line and the right control line is wound on the winding element with a winding diameter that remains constant over its length.

[0009] In contrast to EP 2 766 256 B1, none of the control lines need to be guided all the way through the bar to the other end of the bar. Instead, the winding element, for example in the form of a hollow or solid winding rod, extends into the hollow space of the bar. Due to the axial movement of the winding element during its rotation, the control lines do not wind on top of each other as in a spool known from EP 2 766 256 B1, but rather are arranged next to one another in an axial direction, so that the winding diameter remains constant. This means that the trimming path also remains the same for all windings around the winding element.

[0010] When trimming with the steering lines, it's also important to note that the kite's surface area exposed to the wind increases (powering) when the steering lines are shortened. Lengthening the steering lines results in depowering. This is the exact opposite of trimming with the front lines. The pulling force on the steering lines can therefore increase with increasing trim travel when powering, so the best possible torque ratio is desired. The consistent winding diameter on the winding element prevents a deterioration in torque ratio, as occurs with spool winding of the EP 2 766 256 Bl.

[0011] It should be noted at this point that the control lines can each be designed as a single piece or as two or more pieces that can be linked together. The control lines can be pre-installed as a whole or as a section of each as part of the bar. Alternatively, the bar can be designed without pre-installed control lines. The control lines can then be retrofitted into the bar as a whole or as a section of each as a separate product from the bar. Preferably, at least a short piece of each of the two control lines is pre-installed in the bar so that a long piece of control line can be linked to it outside the bar. The pre-installed piece of control line is then at least long enough to reach out of the axial ends of the bar when the maximum trim travel is fully wound up.

[0012] Since floaters are preferably placed on the control lines where they are led to the respective end of the bar, it is advantageous if the respective control line piece pre-installed in the bar is connected to a long control line piece in or on the respective floater. The floaters serve to buoy the bar in the water and indicate the It depends on the kitesurfer whether the bar is for the left or right end. Floaters can also be a pre-installed part of the bar and / or installed as a separate product later.

[0013] Optionally, the winding element can have a jacket-shaped first, preferably left, winding surface with the winding diameter and a jacket-shaped second, preferably right, winding surface with the winding diameter, wherein each winding of the wound trim section of the left control line rests completely on the first winding surface and each winding of the wound trim section of the right control line rests completely on the second winding surface. Preferably, the winding element is a solid or hollow winding rod, wherein the first winding surface and the second winding surface are each sections of an outer jacket surface of the winding rod. The winding element preferably has a circular cross-section, but can in principle have any cross-section shape.

[0014] Optionally, the winding element can be mounted in a threaded and / or slotted guide, whereby the threaded and / or slotted guide is arranged to the left of the first winding surface or to the right of the second winding surface or axially between the first or second winding surface. If the winding element can be operated from the right end of the bar, it can be advantageous if the threaded and / or slotted guide is not arranged to the right of the right winding surface, as then the right control line does not have to be deflected. Accordingly, it is advantageous if the threaded and / or slotted guide is not arranged to the left of the left winding surface if the winding element can be operated from the left end of the bar. The control line guided from the opposite end of the bar to the winding element only needs to be deflected twice.

[0015] Optionally, the bar can have a manually operable actuating element arranged at the end of the bar from which the winding element can be actuated, wherein the winding element has an actuating axis that extends axially from the actuating element into the bar, wherein the actuating axis is coupled to the actuating element in a rotationally and axially movable manner. The actuating element can, for example, be axially mounted on the actuating axis and form a positive connection with the actuating axis in the circumferential direction, for example in the form of a square, hexagon or with axial webs. Alternatively or additionally, the actuating element can be pinned to the actuating axis. The axially movable coupling between the actuating element and the actuating axis gives the winding element the axial degree of freedom to move axially when the actuating element is rotated, without the actuating element having to move axially.

[0016] Optionally, the winding element can extend along a rotational axis, and the actuating element can have an outer gripping surface whose radial distance from the rotational axis of the winding element is at least as large as the winding diameter, preferably twice as large. Due to the corresponding leverage, the winding element can be rotated more easily in a winding direction. A complicated transmission mechanism as in EP 2 766256 B1 is not required.

[0017] Optionally, the bar can have a locking system which, in a locked position, engages when the winding element is rotated in an unwinding direction and prevents further unwinding of the wound trim sections and, in the released position, does not engage when the winding element is rotated in the unwinding direction and thus allows unwinding of the wound trim sections.

[0018] Preferably, a manually operable actuating element is arranged at the end of the bar from which the winding element is operable, wherein the actuating element is coupled to the locking system such that the axial positioning of the actuating element determines whether the locking system is in the locked position or the released position. The winding element is preferably actuated by rotating the actuating element. If the actuating element is pulled out axially, the locking system is preferably placed in a released position. If the actuating element is pushed in axially again, the locking system is preferably placed in the locked position.

[0019] Optionally, the locking system n > 2, ne KI, can have notches evenly distributed in the circumferential direction and at least one locking lug engaging radially into the notches, wherein the at least one locking lug, in the locked position, yields resiliently at each of the notches upon rotation of the winding element in a winding direction opposite to the unwinding direction, thus allowing the wound trim sections to be wound up, and wherein the at least one locking lug springs back resiliently behind each yielded notch, thereby generating acoustic feedback. Since the actuating element is preferably operated with a supination movement that can be comfortably performed up to approximately 150°, at least three notches evenly distributed in the circumferential direction are advantageous, so that there are no more than 120° between the notches. The bar can be designed for either left- or right-handed users, so that the winding element can be operated from the corresponding end of the bar.In addition, the trim system can be designed for supination or pronation for powering.

[0020] Optionally, the locking system n > 2, ne KI, can have notches evenly distributed in the circumferential direction and at least one locking lug engaging radially into the notches, wherein the at least one locking lug is guided past a notch in the release position and the locking The system is returned to the locked position after each notch passed, before the next notch. This allows for gradual depowering by manually pulling the actuating element out several times and automatically retracting it to the locked position in between. An emergency position can also be provided in which the locking system is not returned to the locked position, allowing the kite to depower completely automatically, meaning the control lines unwind completely.

[0021] Also according to the invention there is provided a system for trimming a kite, the system comprising a bar and a first pair of lines and a second pair of lines, two lines being provided such that they are each connected to one end of the kite, the first pair of lines being provided such that it is connected by its first ends to the control lines (back lines) on the left and right tips of the kite; the front lines being arranged such that they are attached to the front of the kite on the left and right and the other ends are connected to a harness; the control lines extend to the left and right at opposite ends of the bar, the bar having opposite ends and an internal hollow space, the bar being held in place to control the kite when kiting.The invention is characterized in that the system further comprises: a winding rod which generates an axial movement via its thread and causes an orderly, spiral winding of the back lines onto the winding rod so that the trim travel per revolution remains constant; and a winder at the end of the winding rod so that by actuating (turning) the winder the back lines are wound up or unwound in an orderly and synchronous manner, wherein the winding rod extends from one end of the bar into the bar where the control lines are wound up or unwound, and wherein the first back line from the kite to the first end of the bar through the hollow space of the bar or along the bar to the winding. bar and the second back line runs through the second end of the bar into the hollow of the bar to the winding bar.

[0022] Optionally, the system may further comprise a first end piece provided at the first end of the bar and a second end piece provided at the second end of the bar, whereby the back line runs with a deflection through the inner cavity or along the bar to the winding rod, and the back line runs through the second end piece of the bar into the cavity of the bar to the winding rod.

[0023] Optionally, the winding rod can be designed so that the ends of the control lines are attached to the winding rod.

[0024] Optionally, the winding rod can be provided with a thread, which ensures axial propulsion for an orderly winding and unwinding of the two control lines in the hollow space of the bar, which has an internal thread matching the winding rod.

[0025] Optionally, the winding rod can be connected to a winder and wind up and unwind the first and second control lines synchronously.

[0026] Optionally, the winding rod can be aligned parallel to the bar in the cavity and a winder can be attached to its end, which winds up or unwinds the baking lines by turning.

[0027] Optionally, the winder can compensate for the axial advance of the winding rod thread by means of a guide in the winding rod and a matching guide in the winder.

[0028] Optionally, a locking mechanism can be provided at the end piece, which allows winding in stages with the winder, but prevents unwinding by means of a lock.

[0029] Optionally, an extra level in the winder allows you to gradually release the winding bar from the end piece's locking mechanism by pulling the winder outward, thereby freeing the control lines for unwinding. Alternatively, the winder can be pushed axially into the bar for depowering.

[0030] The present invention will now be explained in more detail with reference to the figures. They show: Fig. 1 shows schematically a kite with front lines, control lines, an embodiment of the bar according to the invention and a trapeze; Fig. 2a, b schematically show a first embodiment of the bar according to the invention, once with unwound control lines and once with wound control lines; Fig. 3a, b a second embodiment of the bar according to the invention, once with unwound control lines and once with wound control lines; Fig. 4a, b a third embodiment of the bar according to the invention, once with unwound control lines and once with wound control lines; Fig. 5 is a longitudinal section through an embodiment of the trim system according to the invention; Fig. 6 is a perspective view of the winding element, actuating element and locking system trim system according to Fig. 5; and Fig. 7 shows a cross-section through the locking system of the trim system according to Fig. 5 and 6.

[0031] Figure 1 shows a kite 100 that is attached to a left control line 1, a left front line 2, a right front line 3, and a right control line 4. The front lines 2, 3 are attached to a front side of the kite 100, and the control lines 1, 4 are attached to a rear side of the kite, which is why the control lines are also called back lines. The left control line 1 leads to a left end of a bar 10, with which a kite surfer can control the kite 100. The right control line 4 is correspondingly led to a right end of the bar 10. The front lines 2 and 3 are brought together and run together through an opening that runs transversely to the longitudinal direction of the bar 10, across the bar 10 to a trapeze 22, which the kite surfer wears on his or her hip.As soon as the wind hits the Kite 100, the Kite 100 pulls on the front lines 2 and 3 on the trapeze 22, allowing the kitesurfer to move forward.

[0032] To simplify orientation, a right-handed Cartesian coordinate system is shown in the drawings, with the z-axis running in a direct line connecting the bar 10 and the kite 100. The x-axis runs in the longitudinal direction of the bar 10. The y-axis runs in the longitudinal axis of the kitesurfer's body. The front lines 2, 3 and control lines 1, 4 therefore extend mainly in the z-direction. By rotating the bar 10 around the y-axis, the direction of movement of the kite 100 in the xy-plane is controlled. The distance of the bar 10 in the z-direction from the trapeze 22 is determined by the the desired pressure point of the Kite 100 is set, at which the Kite 100 assumes a desired angular position around the x-axis and thus offers a desired attack surface for the wind.

[0033] By trimming the kite 100, the size of the attack surface of the kite 100 can be adjusted at a specific z-position of the bar 10. The bar 10 has a trimming system described in more detail below, in which trimming is carried out by synchronously winding and unwinding the control lines 1, 4.

[0034] Figures 2a and b schematically show the bar 10, which extends in the x-direction from a left end piece 13 to a right end piece 14. The bar 10 has a trimming system in which a winding element 15, which can be actuated from the left or right end of the bar 10, is arranged within the bar 10 for synchronously winding and unwinding a respective trim section of the left control line 1 and the right control line 2. The figures each show embodiments in which the winding element 15 can be actuated from the right end of the bar 10. Alternatively, the bar 10 could be designed for a left-hander such that the winding element 15 can be actuated from the left end of the bar 10.

[0035] In the illustrated embodiments, the winding element 15 is a solid or hollow winding rod that extends from one end (here the right end) of the bar 10 into the hollow space of the bar 10. The winding element 15 has a jacket-shaped first winding surface 15a with a specific winding diameter and a jacket-shaped second winding surface 15b with the same winding diameter. The first winding surface 15a can, as shown in the figures, form a left winding surface 15a or a right winding surface. Accordingly, the second winding surface 15b can form a right winding surface or a left winding surface. The left control line 1 leads in the z-direction in The left end piece 13 is guided via a first deflection 16a in the x-direction into the cavity of the bar 10 to the winding element 15 and via a second deflection 16b in the z-direction to the first winding surface 15a. The end of the left control line 1 is connected to the winding element 15 in a tensile strength manner, so that the left control line 1 is wound up on the first winding surface 15a when the winding element 15 rotates about the x-axis. The right control line 4, which leads into the right end piece 14 of the bar 10, is similarly guided via deflections 20 to the second winding surface 15b and is connected to the winding rod 15 in a tensile strength manner, so that the right control line 4 is wound up synchronously on the second winding surface 15b when the winding element 15 rotates about the x-axis. The winding element has a thread 11 that engages with a corresponding counter-thread 21 fixedly arranged in the bar 10. As a result, the winding element 15 moves axially within the bar 10 when rotated about the x-axis.This, in turn, has the effect that the left control line 1 and the right control line 4 are wound onto the winding element 15 with a constant winding diameter that corresponds to the outer diameter of the first and second winding surfaces 15a,b. This prevents the windings of the control lines 1, 4 from overlapping each other, thus preventing the winding diameter from increasing during winding. Accordingly, the trim travel per revolution of the winding element 15 is constant across the entire trim travel.

[0036] The winding element 15 also has an actuating axis 15c extending in the x-direction, which extends to the right from the right end piece 14 of the bar 10. An actuating element 12 in the form of a winder or rotary handle is attached to a part of the actuating axis 15c protruding from the bar 10 in the negative x-direction. The actuating element 12 has an outer gripping surface 12a, the radial distance of which from the rotational axis x of the winding element 15 is at least as large as the winding diameter of the first and second winding surfaces 15a, b, preferably at least twice as large. This allows the winding element 15 to be easily rotated about the x-axis by means of the actuating element 12. For this purpose, the actuating axis 15c of the winding element 15 is rotationally coupled to the actuating element 12. In the embodiment shown in Figures 2a, b, the actuating axis 15c has a groove 18 extending in the x-direction, into which a corresponding guide element 19 of the actuating element 12 engages. As a result, the coupling between the actuating axis 15c and the actuating element 12 is rotationally fixed about the x-axis, but axially movable in the x-direction. This allows the winding element 15 to move axially while the actuating element 12 is rotated about the x-axis.

[0037] The trimming system also has a locking system 23, which, in a locked position, engages upon rotation of the winding element 15 in an unwinding direction and prevents further unwinding of the wound trim sections. In a release position of the locking system 23, it does not engage upon rotation of the winding element 15 in the unwinding direction and thus allows unwinding of the wound trim sections. The actuating element 12 is coupled to the locking system 23 such that the axial positioning of the actuating element 12 determines whether the locking system 23 is in the locked position or in the release position. The actuating element 12 thus has at least two manually adjustable axial positions. In the embodiments shown, the actuating element 12 can be pulled out axially to bring the locking system 23 into the release position.If the actuating element 12 is pressed axially towards the bar 10 or automatically pulled / pressed there, the locking system 23 goes into the locked position.

[0038] The locking system 23 has a locking lug 23a, which engages in circumferentially distributed notches (see Figure 7). The locking system 23 thus represents a locking mechanism that enables the control lines 1, 4 to be wound up and prevents them from being unwound by means of a lock. The exemplary embodiments shown in Figures 3a, b and 4a, b differ from the exemplary embodiment shown in Figures 2a, b in the fixed position of the thread guide 21 in the bar 10. In the exemplary embodiment shown in Figures 3a, b, the thread guide 21 is arranged between the first winding surface 15a and the second winding surface 15b of the winding element 15. Accordingly, the thread 11 on the winding element 15 is also located between the first winding surface 15a and the second winding surface 15b. This has the advantage that the lateral tensile forces acting on the winding element 15, with which the control lines 1, 4 engage the winding element 15, can be easily absorbed by the thread guide 21.In addition, the control line 1,4, which is controllable with the end of the bar from which the winding element 15 is actuated (here the right control line 4), can be wound up on the winding element 15 without deflections.

[0039] Alternatively, as shown in Figures 4a, b, the threaded guide 21 can be arranged to the right of the second winding surface 15b. Analogous to the left control line 1, in the embodiment shown in Figures 4a, b, the right control line is also guided to the second winding surface 15b via two deflections 20 (similar to Figures 2a, b). This has the advantage that both control lines 1, 4 are guided, so that the corresponding friction force for both control lines 1, 4 is approximately the same.

[0040] Figure 5 shows a longitudinal section in the xz plane through the trim system, as it can preferably be implemented. At the right end of the bar 10, a right end piece 14 is arranged, which projects into the cavity of the bar 10 and forms the thread guide 21 in the form of an internal thread. The winding element 15 here is a Solid winding rod, which has an external thread 11 corresponding to the threaded guide 21. The winding element 15 projects with its inner axial end over the threaded guide 21 into the cavity of the bar 10 and has there a first control line receptacle 25a. The first control line receptacle 25a is here a transverse bore through the winding element 15, which is chamfered so that the left control line I can be guided through the control line receptacle 25a and an end thickening, for example a knot, of the left control line 1 is at least partially countersunk but cannot slip through. To the right of the first control line receptacle 25a extends axially the first winding surface 15a, on which the respective trim section of the left control line 1 is wound onto the winding element 15 with a winding diameter that remains constant over its length and corresponds to the outer diameter of the first winding surface 15a. For winding the right control line 4, the winding element 15 has a second control line receptacle 25b. The second control line receptacle 25b is a transverse bore through the winding element 15 running parallel to the first control line receptacle 25a, wherein the internal thread II of the winding rod 15 is arranged axially between the first winding surface 15a and the second control line receptacle 25b. Furthermore, the second control line receptacle 25b, in contrast to the first control line receptacle 25a, is chamfered on the other side such that the right control line 4 can be threaded through the second control line receptacle 25b opposite to the left control line 1 and an end thickening, for example a knot, of the right control line 4 is partially sunk into the second control line receptacle 25b but cannot slip through. The left control line 1 and the right control line 4 are thus threaded into the winding element 15 from different sides so that they are wound onto it from opposite sides of the winding element 15. To the right of the second control line receptacle 25b extends axially the second winding surface 15b, on which the trim section of the right control line 4 is fastened with a a winding diameter which remains constant over its length and which corresponds to the outer diameter of the second winding surface 15b, is wound on the winding element 15.

[0041] Figure 6 shows a perspective view of the trim system shown in Figure 5 without the bar 10 and the end piece 14. In particular, Figure 6 illustrates a possible embodiment of the locking system 23. The kite 100 is trimmed for more power by the kite surfer grasping the gripping surfaces 12a of the actuating element 12 with their right hand and rotating it forward by supinating their forearm. Since the thread 11 of the winding element 15 is a right-hand thread, the winding element 15 moves axially into the bar 10. Figure 6 shows the locking system 23 in a locked position, in which it is prevented from rotating backward in the unwinding direction.For this purpose, the locking system 23 here has three notches 23b evenly distributed in the circumferential direction and a locking lug 23a, wherein the locking lug 23a, in the locked position shown in Figure 6, yields resiliently at each of the notches 23b upon rotation of the winding element 15 in the winding direction, thus allowing the wound trim sections of the control lines 1, 4 to be wound up. Behind each yielding notch 23b, the locking lug 23a springs back resiliently, thereby generating acoustic feedback. The trim travel can thus be precisely adjusted to one-third of the circumference of the winding surfaces 15a, b. To move the locking system 23 from the locked position to the release position, the kitesurfer can pull the actuating element 12 axially outwards so that the locking lug 23a is guided past a notch 23b in the release position.A reset element 23c forces the locking system 23 back into the locked position after each notch 23b passed, before the next notch 23b. If the winding element 15 rotates in the unwinding direction in the release position, the locking system 23 automatically returns to the locked position to prevent further unwinding. This enables gradual depowering by a defined amount. trim travel is possible. It should be noted at this point that the reset element 23c is optional, and complete depowering by fully unwinding the release position may be desired. It may also be advantageous not to provide the reset element 23c at every notch 23b, so that depowering can occur in larger steps than powering.

[0042] Figure 7 shows a cross-sectional view of the trimming system shown in Figures 5 and 6. It clearly shows that the locking lug 23a engages the notches 23b in the negative z-direction and, in the locked position of the locking system 23, prevents rotation in the unwinding direction. However, the right end piece 14 of the bar 10 allows the locking lug 23a to resiliently deflect the notches 23b in the positive y-direction when the winding element 15 is rotated in the winding direction. To simplify this, both the locking lug 23a and the notches 23b have corresponding inclined surfaces that can slide against each other with low friction. List of reference symbols 100 kites 1 control line left 2 front line left 3 front line right 4 Control line right 10 Bor / Steering ton 1 1 threaded winding rod 12 Actuator / winder 12a Grip surfaces 13 Left end piece / left end of the bar 14 Right end piece / right end of the bar 15 Winding element / winding rod 15a first changing area 15b second changing area 15c Actuating axis 16a first diversion 16b second deflection 17 axial locking position / extra level rewinder 18 Non-rotatable and axially movable coupling / guide in the winding rod 19 Non-rotatable and axially movable coupling / guide in the actuating element / winder 20 deflections 21 Thread guide / internal thread 22 trapeze 23 locking system 23a locking lug 23b Rests 23c Reset element 25a first control line receptacle 25b second control line receptacle

Claims

Claims Bar (10) for kitesurfing, wherein the bar (10) has a system for trimming a kite (100), which can be connected to the bar (10) via a left control line (1), which can be controlled with a left end of the bar (10), and via a right control line (4), which can be controlled with a right end of the bar (10), wherein a winding element (15) which can be actuated from the left or right end of the bar (10) is arranged within the bar (10) for synchronously winding and unwinding a respective trim section of the left control line (1) and the right control line (4), wherein the winding element (15) is movably mounted in the bar (10) such that when actuated it rotates within the bar (10) and moves axially in the process, so that the respective trim section of the left control line (1) and the right control line (4) is provided with a constant winding diameter is wound on the winding element (15).Bar (10) according to claim 1, wherein the winding element (15) has a jacket-shaped first winding surface (15a) with the winding diameter and a jacket-shaped second winding surface (15b) with the winding diameter, wherein each winding of the wound trim section of the left control line (1) rests completely on the first winding surface (15a) and each winding of the wound trim section of the right control line (4) rests completely on the second winding surface (15b). Bar (10) according to claim 2, wherein the winding element (15) is mounted in a threaded and / or slotted guide (21), wherein the threaded and / or slotted guide (21) is to the left of the first winding surface (15a) or to the right of the second winding surface (15b). or is arranged axially between the first (15a) and second winding surface (15b).

4. Bar (10) according to one of the preceding claims, further comprising a manually operable actuating element (12) arranged at the end of the bar (10) from which the winding element (15) is operable, wherein the winding element (15) has an actuating axis (15c) extending axially from the actuating element (12) into the bar (10), wherein the actuating axis (15c) is rotationally and axially movably coupled to the actuating element (12).

5. Bar (10) according to claim 4, wherein the winding element (15) extends along a rotational axis (x) and the actuating element (12) has an outer gripping surface (12a) whose radial distance from the rotational axis (x) of the winding element (15) is at least as large as the winding diameter, preferably at least twice as large.

6. Bar (10) according to one of the preceding claims, further comprising a locking system (23) which, in a locking position, engages upon rotation of the winding element (15) in an unwinding direction and prevents further unwinding of the wound trim sections and, in a release position, does not engage upon rotation of the winding element (15) in the unwinding direction and thus allows unwinding of the wound trim sections.

7. Bar (10) according to claim 6, further comprising a manually operable actuating element (12) arranged at the end of the bar (10) from which the winding element (15) is operable, wherein the actuating element (12) is connected to the locking system (23) is coupled so that the axial positioning of the actuating element (12) determines whether the locking system (23) is in the locked position or the released position.

8. Bar (10) according to claim 6 or 7, wherein the locking system (23) has n > 2 notches (23b) evenly distributed in the circumferential direction and at least one locking lug (23a) radially engaging into the notches (23b), wherein the at least one locking lug (23a) in the locked position upon rotation of the winding element (15) in a winding direction opposite to the unwinding direction gives way resiliently at each of the notches (23b) and thus allows winding up of the wound trim sections, and wherein the at least one locking lug (23a) springs back resiliently behind each yielded notch (23b) and thereby generates an acoustic feedback.

9. Bar (10) according to one of claims 6 to 8, wherein the locking system (23) has n > 2 notches (23b) evenly distributed in the circumferential direction and at least one locking lug (23a) radially engaging into the notches (23b), wherein the at least one locking lug (23a) is guided past a notch (23b) in the release position and the locking system (23) is placed back into the blocking position behind each notch (23b) guided past before the next notch (23b).

10. Bar (10) according to one of the preceding claims, wherein the trim sections of the left control line (1) and the right control line (4) are wound thereon from opposite sides of the winding element (15). 1 1. System for trimming a kite (100), the system comprising a bar (10) and a first pair of lines (1 )+(4) and a second pair of lines nen (2)+(3), wherein two lines are provided such that they are each connected to one end of the kite (100), wherein the first pair of lines (1)+(4) is provided such that it is connected with its first ends to the control lines (back lines) on the left tip (1) and the right tip (4) on the kite (100); the front lines (2)+(3) are designed such that they are attached to the front of the kite (100) left (2) right (3) and the other ends of (2)+(3) are connected to a trapeze (22);the control lines (1)+(4) extend at the opposite ends of the bar (10) to the left (1) and right (4), the bar (10) having opposite ends and an internal cavity, the bar (10) being held in place during kiting to control the kite (100), characterized in that the system further comprises: a winding rod (15) which, via its thread (11), generates an axial movement and effects an orderly, spiral winding of the back lines (1)+(4) onto the winding rod (15), so that the trim travel per revolution remains constant; and a winder (12) at the end of the winding rod (15), so that by actuating (rotating) the winder, the back lines (1)+(4) are wound or unwound in an orderly and synchronous manner; wherein the winding rod extends from one end of the bar into the bar (10), where the control lines (1)+(4) are wound up or unwound;and wherein the first back line (1) runs from the kite (100) to the first end (13) of the bar (10) through the hollow space of the bar or along the bar to the winding rod (15) and the second back line (4) runs through the second end of the bar (14) into the hollow space of the bar to the winding rod.; A system for trimming a kite (100) according to claim 11, wherein the system further comprises a first end piece (13) provided at the first end of the bar (10) and a second end piece (14) provided at the second end of the bar (10), whereby the back line (1) runs with a deflection through the inner cavity or along the bar (10) to the winding rod (15), and the back line (4) runs through the second end piece (14) of the bar (10) into the cavity of the bar (10) to the winding rod (15). A system for trimming a kite (100) according to claim 11 or 12, wherein the winding rod (15) is provided such that the ends of the control lines (1) and (4) are attached to the winding rod (15).A system for trimming a kite (100) according to any one of claims 11 to 13, wherein the winding rod (15) is provided with a thread (11) ensuring axial propulsion for orderly winding and unwinding of the two control lines (1)+(4) in the hollow space of the bar (10), which has an internal thread (21) matching the winding rod. A system for trimming a kite (100) according to any one of claims 11 to 14, wherein the winding rod (15) is connected to a winder (12) and synchronously winds and unwinds the first and second control lines. A system for trimming a kite (100) according to any one of claims 11 to 15, wherein the winding rod (15) is aligned parallel to the bar (10) in the hollow space and has a winder (12) attached to its end, which winds or unwinds the back lines by rotating.

17. A system for trimming a kite (100) according to claim 16, wherein the winder (12) compensates for the axial advance of the winding rod thread by means of a guide (18) in the winding rod (15) and a matching guide (19) in the winder (12).

18. A system for trimming a kite (100) according to claim 17, wherein a locking mechanism is provided on the end piece (14) that allows winding in stages with the winder (12) but prevents unwinding by means of a lock.

19. System for trimming a kite (100) according to claim 18, wherein an extra level (17) in the winder (12) allows the winding rod (15) to be gradually released from the locking of the end piece (14) by pulling the winder (12) outwards and thereby to release the control lines (1) + (4) for unwinding again.

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