Double-ended, length-adjustable, snap-buckle-type quick-release fastener

Abstract

A quick-release fastener with adjustable length at both ends, consisting of a snap-buckle type, comprising an axle rod (21) which is hollow and has a continuous cavity (22) inside, wherein one end is provided with an internally threaded section (221) of the first end and the other end with an internally threaded section (222) of the second end; an adjusting rod (23) with an externally threaded section (231), wherein one end of the adjusting rod (23) is provided with a snap-buckle head (232), and wherein the externally threaded section (231) of the adjusting rod (23) is screwed into the internally threaded section (221) of the first end of the cavity (22);a movable sleeve (24) having an interior (25), wherein one end of the movable sleeve (24) forms an opening (241) and the other end is provided with a through-hole (26) which is connected to the cavity (22), wherein a ring spring (28) is arranged in the cavity (22), wherein the end of the axle rod (21) facing away from the adjusting rod (23) is inserted through the opening (241) into the cavity (22) of the movable sleeve (24), wherein an end surface (211) of the axle rod (21) rests against the ring spring (28), and wherein its other end rests against a step (27) of the movable sleeve (24);and an eccentric locking component (30) comprising an eccentrically rotatable quick-release lever (31) and a locking rod (32), wherein the circumferential wall of the locking rod (32) facing away from the eccentric locking component (30) forms an external threaded section (321), wherein the external threaded section (321) of the locking rod (32) passes through the through-hole (26) of the movable sleeve (24) and through the ring spring (28) and is screwed into the internal threaded section (222) of the second end of the cavity (22) of the axle rod.

Description

Technical field

[0001] The invention relates to a quick-release buckle-type fastener that allows length adjustment at both ends and has a wider range of applications. State of the art

[0002] DE 20 2016 106 746 U1 describes a quick-release fastener for bicycles, which serves to connect to the first and second fork steerer tubes of the bicycle frame, comprising a rod that is guided through the first and second fork steerer tubes, a clamping unit located at one end of the rod that can selectively clamp the first fork steerer tube, and a screw unit located at the other end of the rod that is adjustable on the second fork steerer tube, wherein the screw unit includes a first threaded section, the pitch of which is at least greater than or equal to 2 mm.

[0003] US Patent 2020 / 0283089A1 describes a quick-release device for a bicycle, comprising a shaft with a locking unit at one end and an inner sleeve at the other. The inner sleeve is held at a distance from the end edge of a through-hole in the shaft to form an inner annular groove at the outer end of the through-hole. A threaded cylinder is inserted into the inner annular groove. A through-hole is defined in the threaded cylinder, and an axial end portion of the threaded cylinder has a cylindrical flange. The cylindrical flange is inserted into the inner annular groove of the shaft. A bolt is inserted into the through-hole of the threaded cylinder. The bolt passes through the through-hole and is screwed into the shaft to engage with the inner sleeve, thus pressing and locking the threaded cylinder and the shaft.

[0004] WO 2015 / 185 206 A1 describes a quick-release fastener for bicycles, consisting of an axle with a locking mechanism at one end and an inner sleeve at the other. The inner sleeve is positioned so that it is spaced from the edge of the axle's through-hole, creating an annular space at the outer end of the hole. A threaded cylinder with a central bore is inserted into this space. At one axial end, the threaded cylinder has a cylindrical rim that also fits into the annular space of the axle. A bolt passes through the bore in the threaded cylinder, is screwed into the axle, and then tightened against the inner sleeve. This presses the threaded cylinder and axle together, securely locking them in place.

[0005] Conventional quick-release buckle type 10 for bicycles, as inFig. 1 and Fig. Figure 2 shows a system comprising: an axle rod 11, which is hollow and has a continuous cavity 12 inside, wherein an eccentric locking element 13 is provided at one end of the axle rod 11; an inner sleeve 14, which has an extension section 141 at one end and an internal thread 142 inside; an adjusting rod 15, which has an external thread 151, is provided at one end with a snap-lock head 152 which can be clamped from the outside, and is provided at the other end with an annular groove 153, wherein the end of the adjusting rod 15 with the annular groove 153 is screwed into the inner sleeve 14 from the extension section 141 and protrudes from the other end of the inner sleeve 14; and a locking ring 154, which is arranged in the annular groove 153 to prevent the adjusting rod 15 from being accidentally unscrewed from the inner sleeve 14, and to restrict the inner sleeve 14 in the cavity 12,that the extension section 141 protrudes from the cavity 12. The clamping element 16 has a movable clamping opening 17 that can be elastically opened and closed, like a camera shutter. The snap-lock head 152 can quickly pass through the movable clamping opening 17 and elastically open the clamping opening. The movable clamping opening 17 can be elastically retracted and then clamp the adjusting rod 15. The eccentric locking element 13 locks the vehicle frame 1 and the axle rod 11. The aforementioned structure can attach the wheelset to the bicycle frame 1. Width errors in the bicycle frame 1 can occur during manufacturing or machining. The adjusting rod 15 can be fine-turned to accommodate the different widths of different vehicle types.to adjust the length of one end of the quick-release 10 and adapt it to the different widths of the vehicle frames 1. However, the quick-release 10 only allows length adjustment at one end. To prevent the adjusting rod 11 from deviating too much from one side, only a slight adjustment can be made. Its adjustable length range is insufficient to adapt to the different widths of various vehicle frames 1. The application range is limited, and therefore there is a need for improvement. Object of the invention

[0006] To solve the aforementioned problems, the invention provides a quick-release fastener with adjustable length at both ends, similar to a snap buckle. Its technology and function are as follows: the quick-release fastener with adjustable length at both ends has an adjustment rod with a snap buckle head at one end and a locking rod at the other end. By rotating the adjustment rod or the locking rod, length adjustment at both ends can be achieved, thus increasing the range of application.

[0007] This task is solved by the double-ended length-adjustable, snap-buckle-type quick-release fastener, comprising an axle rod that is hollow and has a continuous cavity inside, one end being provided with an internal threaded section of the first end and the other end with an internal threaded section of the second end; an adjusting rod with an external threaded section, one end of the adjusting rod being provided with a snap-buckle head, and the external threaded section of the adjusting rod being screwed into the internal threaded section of the first end of the cavity;a movable sleeve having an interior, wherein one end of the movable sleeve forms an opening and the other end is provided with a through-hole that communicates with the cavity, wherein a ring spring is arranged in the cavity, wherein the end of the axle rod facing away from the adjusting rod is inserted through the opening into the cavity of the movable sleeve, wherein the end face of the axle rod rests against the ring spring, and wherein its other end rests against the step of the movable sleeve;and an eccentric locking component comprising an eccentrically rotatable quick-release lever and a locking rod, wherein the circumferential wall of the locking rod facing the eccentric locking component forms an external threaded section, wherein the external threaded section of the locking rod is passed through the through-hole of the movable sleeve and the ring spring and is screwed into the internal threaded section of the second end of the cavity of the axle rod.

[0008] In one embodiment of the invention, the tightening torque between the internal thread section of the first end and the adjusting rod is greater than the tightening torque between the internal thread section of the second end and the locking rod.

[0009] In one embodiment of the invention, a loosening protection layer is formed on the external thread section of the adjusting rod.

[0010] In one embodiment of the invention, the circumferential wall of the locking rod facing the eccentric locking component forms a sliding section, wherein a stop flange is provided between the external thread section and the sliding section of the locking rod, wherein the circumferential wall of the axle rod is provided at a position corresponding to the sliding section with at least one side hole which is connected to the cavity, wherein a blocking element is arranged in the side hole and projects into the cavity, wherein the stop flange of the locking rod can be limited by the blocking element.

[0011] In one embodiment of the invention, the locking element is a countersunk screw and the side hole is a screw hole with an internal thread.

[0012] In one embodiment of the invention, the buckle head is provided with an outwardly open drive hole.

[0013] In one embodiment of the invention, the internal thread section of the second end of the axle rod has an end surface, wherein the inner diameter of the interior is larger than the inner diameter of the through hole, so that a step is formed between the interior and the through hole, with one end of the ring spring resting on the end surface and its other end resting on the step.

[0014] This allows the quick-release buckle to adjust the length of both ends, thereby increasing the range of applications. Brief description of the drawings Fig. 1. A perspective view of the conventional solution, Fig. 2 a cross-sectional view of the conventional solution, Fig. 3 an exploded view of the invention, Fig. 4a perspective representation of the invention, Fig. 5 a sectional view of the invention, Fig. 6. A sectional view of the adjustment of the length of one end of the invention, Fig. 7a sectional view of the adjustment of the length of the other end of the invention, Fig. 8 a sectional view of the coating of the loosening protection layer of the axle rod of the invention, Ways to implement the invention

[0015] To provide a better understanding of the present invention, a preferred embodiment is hereby described in detail with the drawings as follows.

[0016] As in Fig. 3, Fig. 4, Fig. 5, Fig. 6 to Fig. As shown in Figure 7, the quick-release fastener 20 comprises: an axle rod 21, which is hollow and has a continuous cavity 22 inside, wherein one end is provided with an internally threaded section 221 of the first end and the other end with an internally threaded section 222 of the second end, the internally threaded section of the second end of the axle rod 21 having an end surface 211; an adjusting rod 23 with an externally threaded section 231, wherein one end of the adjusting rod 23 is provided with a snap-lock head 232 which can be clamped from the outside, the snap-lock head 232 being provided with an outwardly open drive hole 233, and wherein the externally threaded section 231 of the adjusting rod 23 is screwed into the internally threaded section 221 of the first end of the cavity 22; a movable sleeve 24 which has an interior space 25 inside,wherein one end of the movable sleeve 24 forms an opening 241 and the other end is provided with a through-hole 26 which communicates with the interior 25, wherein the inner diameter of the interior 25 is larger than the inner diameter of the through-hole 26, so that a step 27 is formed between the interior 25 and the through-hole 26, wherein a ring spring 28 is arranged in the interior 25, wherein the end of the axle rod 21 facing away from the adjusting rod 23 is inserted through the opening 241 into the interior 25 of the movable sleeve 24, wherein the end face 211 of the axle rod 21 rests against the ring spring 28, and wherein its other end rests against the step 27 of the movable sleeve 24; and an eccentric locking component 30 comprising an eccentrically rotatable quick-release lever 31 and a locking rod 32,which is screwed into the internal threaded section 222 of the second end. The circumferential wall of the locking rod 32 facing away from the eccentric locking component forms an external threaded section 321, and its circumferential wall facing the eccentric locking component forms a sliding section 322. A stop flange 323 is provided between the external threaded section 321 and the sliding section 322 of the locking rod 31. The external threaded section 321 of the locking rod 32 is guided through the through-hole 26 of the movable sleeve 24 and the ring spring 28 and screwed into the internal threaded section 222 of the second end of the cavity 22 of the axle rod. Simultaneously, the ring spring 28 is compressed. In addition, the circumferential wall of the axle rod 21 is provided with at least one side hole 212 at a position corresponding to the sliding section 322.which is connected to the cavity 22. A locking element 33 is arranged in the side hole 212 and projects into the cavity 22. The stop flange 323 of the locking rod can be limited by the locking element 33, allowing the locking rod 32 to slide in the area of ​​the sliding section 322. This allows the quick-release buckle 20 to adjust its length in two directions, thus increasing its range of application.

[0017] The structure, function, and effect of the present invention are described in detail as follows: As in Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. As shown in Figure 8, the locking element 33 of the present invention is a countersunk screw. The side hole 212 is a screw hole with an internal thread. The locking element 33 is screwed into the side hole 212 so that the locking element 33 projects into the cavity 22 of the axle rod, but does not press against the sliding section 322, thus avoiding any obstruction of the rotation of the locking rod 32. The stop flange 323 prevents the locking rod 32 from accidentally detaching from the axle rod 21. Furthermore, the tightening torque between the internally threaded section 221 of the first end and the adjusting rod 23 of the present invention is greater than the tightening torque between the internally threaded section 222 of the second end and the locking rod 32.Its function is that when the quick-release fastener 20 is installed on the bicycle frame 1 and the wrench 2 is inserted into the drive hole 233 of the adjusting rod 23 and turned, no relative rotation is generated between the axle rod 21 and the adjusting rod 23, while a relative rotation is generated between the axle rod 21 and the locking rod 32. In other words, when the wrench 2 turns the adjusting rod 23, the position of the locking rod 32 can be adjusted to change the length of the quick-release fastener 20. As shown in . Fig. As shown in Figure 8, the tightening torque of the invention is adjusted by forming a loosening protection layer 29 (such as an anti-solvent layer) on the external threaded section 231 of the adjusting rod 23. The tightening torque can be varied by adjusting the area and thickness of the loosening protection layer 29, thereby increasing the friction of the adjusting rod 23. This prevents loosening or dislodging and simultaneously prevents water ingress. To adjust the length of the quick-release buckle 20, the user first holds the axle rod 21 and inserts the wrench 2 into the drive hole 233 of the adjusting rod 23. This allows the adjusting rod 23 to be rotated relative to the axle rod 21 (as shown in Figure 8). Fig. (shown in Figure 6). When the adjusting rod 23 is turned clockwise, it is screwed into the internally threaded section 221 of the first end, thus reducing the length of the snap-on quick-release fastener 20. When the adjusting rod 23 is turned counterclockwise, it is unscrewed from the internally threaded section 221 of the first end, thus increasing the length of the snap-on quick-release fastener 20. To prevent the axle rod 21 from deviating excessively to one side, the user holds the quick-release lever 31 and inserts the wrench into the drive hole 233 of the adjusting rod 23. Because the anti-loosening layer 29 is formed on the externally threaded section 231 of the adjusting rod 23 to increase friction, the tightening torque is high.Therefore, when the wrench 2 is turned, the adjusting rod 23 and the axle rod 21 are turned synchronously, so that a relative rotation is generated between the axle rod 21 and the locking rod 32 (as in . Fig.(7 shown). When the axle rod 21 is rotated clockwise, the locking rod 32 is screwed into the internally threaded section 222 of the second end, thereby reducing the length of the snap-on quick-release fastener 20. Simultaneously, the eccentric locking component 30 presses against the movable sleeve 24 and the ring spring 28, causing the movable sleeve 24 to be displaced toward the axle rod 21. When the axle rod 21 is rotated counterclockwise, the locking rod 32 is unscrewed from the internally threaded section 222 of the second end, thereby increasing the length of the snap-on quick-release fastener 20. At the same time, the ring spring 28 elastically returns to its original position and presses against the movable sleeve 24 and the eccentric locking component 30, thereby moving the movable sleeve 24 away from the axle rod 21, so that the movable sleeve 24 and the eccentric locking component 30 do not retain a gap.In this way, the two ends of the axle rod 21 of the quick-release buckle 20 can be shortened or lengthened uniformly. After the length has been adjusted using the steps described above, the invention can be installed on the bicycle frame 1 to secure the wheel axle. If, after installation, it turns out that the quick-release buckle 20 does not correspond to the usable length of the bicycle frame 1, the user can insert the wrench 2 from the outside of the bicycle frame 1 into the drive hole 233 of the adjusting rod 23 to rotate the adjusting rod 23, thereby creating a relative rotation between the axle rod 21 and the locking rod 32. This fine adjustment adapts the quick-release buckle 20 to the usable length of the bicycle frame 1.

[0018] The above-mentioned embodiment of the invention offers the following advantages: 1. The width of the bicycle frame 1 varies between different makes and models. The present invention allows the length of the quick-release fastener 20 to be adjusted at both ends by means of the adjusting rod 23 and the locking rod 32, thereby adapting it to bicycle frames 1 of different types and thus increasing its range of application. 2. The quick-release buckle 20 can be used to adjust the length at both ends. The length can be adjusted simply by turning the adjusting rod 23 or the locking rod 32, without having to replace the axle rod or other parts, making adjustment easy and convenient and quick to use. 3. The adjusting rod 23 and the locking rod 32 allow the two ends of the axle rod 21 to be shortened or lengthened evenly to ensure that the axle rod 21 does not deviate when installed on the bicycle frame 1, making the bicycle more stable and the rotation of the wheel axle smoother. 4. The double-ended length-adjustable quick-release buckle 20 has a longer service life because when the bicycle needs to be replaced, only the length of the axle rod 21 needs to be adjusted, which means the quick-release buckle can continue to be used and does not need to be replaced, thus reducing costs.

[0019] The embodiment described above is only a preferred embodiment for the complete illustration of the present invention and is not intended to limit the scope of protection of the present invention. The scope of protection of the present invention is defined by the appended claims. Reference symbol list 1 bicycle frame 2 wrenches 10 quick-release buckle-type fasteners 11 Axle rod 12 Cavity 13 Locking component 14 Inner sleeve 141 Extension section 142 internal threads 15 Adjustment rod 151 external threads 152 Snap buckle head 153 Ring groove 154 locking ring 16 clamping part 17 movable clamping openings 20 quick-release buckle-type fasteners 21 Axle rod 211 End surface 212 side hole 22 Cavity 221 Internal thread section of the first end 222 Internal thread section of the second end 23 Adjustment rod 231 External thread section 232 Snap buckle head 233 Drive hole 24 movable sleeves 241 Opening 25 Interior 26 through hole 27th level 28 ring spring 29 Loose protective layer 30 eccentric locking component 31 Quick-release levers 32 Locking rod 321 External thread section 322 Sliding section 323 Stop flange 33 Blocking element

Claims

A quick-release fastener with adjustable length at both ends, consisting of a snap-buckle type, comprising an axle rod (21) which is hollow and has a continuous cavity (22) inside, wherein one end is provided with an internally threaded section (221) of the first end and the other end with an internally threaded section (222) of the second end; an adjusting rod (23) with an externally threaded section (231), wherein one end of the adjusting rod (23) is provided with a snap-buckle head (232), and wherein the externally threaded section (231) of the adjusting rod (23) is screwed into the internally threaded section (221) of the first end of the cavity (22);a movable sleeve (24) having an interior (25), wherein one end of the movable sleeve (24) forms an opening (241) and the other end is provided with a through-hole (26) which is connected to the cavity (22), wherein a ring spring (28) is arranged in the cavity (22), wherein the end of the axle rod (21) facing away from the adjusting rod (23) is inserted through the opening (241) into the cavity (22) of the movable sleeve (24), wherein an end surface (211) of the axle rod (21) rests against the ring spring (28), and wherein its other end rests against a step (27) of the movable sleeve (24);and an eccentric locking component (30) comprising an eccentrically rotatable quick-release lever (31) and a locking rod (32), wherein the circumferential wall of the locking rod (32) facing away from the eccentric locking component (30) forms an external threaded section (321), wherein the external threaded section (321) of the locking rod (32) passes through the through-hole (26) of the movable sleeve (24) and through the ring spring (28) and is screwed into the internal threaded section (222) of the second end of the cavity (22) of the axle rod. A quick-release fastener with adjustable length at both ends according to claim 1, characterized in that the tightening torque between the internal threaded section (221) of the first end and the adjusting rod (23) is greater than the tightening torque between the internal threaded section (222) of the second end and the locking rod (32). A quick-release fastener with adjustable length at both ends according to claim 2, characterized in that a loosening protection layer (29) is formed on the external threaded section (231) of the adjusting rod (23). A quick-release fastener with adjustable length at both ends according to claim 1, characterized in that the circumferential wall of the locking rod (32) facing the eccentric locking component (30) forms a sliding section (322), wherein a stop flange (323) is provided between the external threaded section (321) and the sliding section (322) of the locking rod (32), wherein the circumferential wall of the axle rod (21) is provided at a position corresponding to the sliding section (322) with at least one side hole (212) which is in communication with the cavity (22), wherein a blocking element (33) is arranged in the side hole (212) and projects into the cavity (22), wherein the stop flange (323) of the locking rod (32) can be limited by the blocking element (33). A quick-release fastener with adjustable length at both ends according to claim 4, characterized in that the locking element (33) is a countersunk screw and the side hole (212) is a screw hole with internal thread. A quick-release fastener with adjustable length at both ends according to claim 1, characterized in that the buckle head (232) is provided with an outwardly open drive hole (233). A quick-release fastener with adjustable length at both ends according to claim 1, characterized in that the internal threaded section (222) of the second end of the axle rod (21) has the end surface (211), wherein the inner diameter of the interior space (25) is larger than the inner diameter of the through hole (26), so that the step (27) is formed between the interior space (25) and the through hole (26), wherein one end of the ring spring (28) rests against the end surface (211) and its other end rests against the step (27).

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