Headset of a bicycle

Abstract

A headset of a bicycle that can be mounted on a head tube set, the head tube set comprising a head tube (91) and a front wheel fork stem (92) that is rotatable relative to the axial direction, with a first fastening element (1) that is arranged in a rotationally fixed manner on the inner wall of the head tube (91) and has at least one resistance structure (11) and a first blocking portion (12), the resistance structures (11) protruding from the first fastening element (1) along the axial direction and being arranged in an annular manner and spaced from one another, one end of each of the resistance structures (11) extending in the axial direction forming a projection (111) that points radially outward, and at least one pressure element (2) that can press the at least one resistance structure (11) and increase the radial dimension of the resistance structure (11), wherein,when the first fastening element (1) and the front wheel fork shaft (92) are rotated relatively, the at least one first blocking section (12) and the at least one second blocking section (31) on the front wheel fork shaft (92) can block each other.

Description

Technical area

[0001] The invention relates to a headset of a bicycle. State of the art

[0002] Generally, a headset capable of limiting the rotation angle of a bicycle's handlebars, as shown in patent TW 510 336 U, comprises a lower bearing and a limiting ring. The lower bearing is inserted into the head tube. The limiting ring is placed around the front fork stem. The lower bearing is provided with a locking piece on its underside. The limiting ring is provided with two locking sections on its upper side. The locking piece is restricted between the two locking sections, thus limiting the rotation angle.

[0003] However, if the lower bearing in the head tube is used for a period of time, it can become fatigued. Or, due to the impact force between the block piece and the block sections, the lower bearing and the head tube become loose. This causes the headset to lose its rotation angle limiting function. Or, the rotation center of the handlebar may not be aligned with the centerline of the bicycle frame. Therefore, there are still deficiencies that need to be improved.

[0004] Therefore, it is necessary to provide a novel and progressive tax rate to solve the problems mentioned above.

[0005] Document US 6 003 890 A describes a fork stop assembly comprising at least one catch surface on the bicycle frame and a fork stop pin on the bicycle fork. Upon rotation of the fork beyond a predetermined position, the fork stop pin engages the catch surface, preventing further rotation of the bicycle fork. This prevents the fork from striking the bicycle frame. The catch surface and the fork stop pin are preferably shaped so that they can be connected in a rotationally fixed manner to the respective parts of a bicycle.

[0006] The document US 2022 / 0 185 421 A1 relates to a mobility device equipped with a steering limiting device that can limit steering in an emergency situation, and to a control method therefor.

[0007] Document CN 1 07 792 277 A discloses a fastening device adapted for the front fork of a bicycle, which essentially consists of a head tube, an upper shell, a fixed ring, a front fork riser, a riser collar, a positioning ring and an adjustment cover. Object of the invention

[0008] The invention is based on the object of creating a headset of a bicycle which prevents the headset from losing its function of limiting the angle of rotation and can prevent the center of rotation of the handlebar from being on the center line of the bicycle frame.

[0009] This object is achieved by the headset of a bicycle according to the invention having the features in claim 1. The subclaims define preferred embodiments of the headset according to the invention.

[0010] The headset is mounted on a head tube set, wherein the head tube set includes a head tube and a front fork stem that is rotatable relative to the axial direction, and the headset comprises a first fastening element and at least one pressure element, wherein the fastening element is arranged non-rotatably on the inner wall of the head tube and has at least one resistance structure and a first blocking portion, wherein the at least one pressure element can press the at least one resistance structure and increase the radial dimension of the resistance structure, and wherein, when the first fastening element and the front fork stem are relatively rotated, the at least one first blocking portion and the at least one second blocking portion on the front fork stem can block each other. Short description of the drawings Fig. 1 is a perspective view of the preferred embodiment of the invention, Fig. 2 and Fig. 3 exploded views of the preferred embodiment of the invention, Fig. 4 is a sectional view of the preferred embodiment of the invention, Fig. 5 and Fig. 6 plan views of the preferred embodiment of the invention, Fig. 7 is a perspective view of another embodiment of the invention, Fig. 8 an exploded view of the further embodiment of the invention, Fig. 9 a sectional view of the further embodiment of the invention. Ways to implement the invention

[0011] The following embodiments are only illustrative of the present invention and should not, however, limit the scope of the present invention.

[0012] Fig. 1 to Fig. 6 show a preferred embodiment of the present invention. The headset of the present invention can be mounted on a head tube set. The head tube set includes a head tube 91 and a front fork stem 92 that is rotatable relative to the axial direction. The headset comprises a first fastening element 1 and at least one pressure element 2.

[0013] The first fastening element 1 is arranged in a rotationally fixed manner on the inner wall of the head tube 91 and has at least one resistance structure 11 and a first blocking section 12. In this embodiment, a plurality of resistance structures 11 are provided.

[0014] The at least one pressure element 2 can press the at least one resistance structure 11 and increase the radial dimension of the resistance structure 11. When the first fastening element 1 and the front fork stem 92 are rotated relatively, the at least one first blocking portion 12 and the at least one second blocking portion 31 on the front fork stem 92 can block each other to limit the angle of rotation of the front fork stem 92 relative to the first fastening element 1. Because the pressure element 2 presses the resistance structures 11 and increases the radial dimension of the resistance structures 11, the resistance structures 11 can fit tightly against the inner wall of the head tube 91.Therefore, the first fixing member 1 does not rotate relative to the head tube 91 when the first locking portion 12 and the second locking portion 31 lock each other to prevent the headset from losing its function of limiting the angle of rotation and to prevent the rotation center of the handlebar from being off the center line of the bicycle frame.

[0015] In this embodiment, the number of at least one pressure element 2 is one. An inclined surface 21 is provided on the outer wall of the pressure element 2 or the resistance structure 11. When the pressure element 2 is moved toward the first fastening element 1, the inclined surface 21 can increase the radial dimension of the resistance structure 11. In this embodiment, the pressure element 2 is provided with the inclined surface 21. The inclined surface 21 increases in the opposite direction to the first fastening element 1. In other embodiments, the inclined surface 21 can be provided on the resistance structure 11.

[0016] The resistance structures 11 protrude from the first fastening element 1 along the axial direction. The resistance structures 11 are arranged in a ring shape and spaced apart from each other so that the resistance structures 11 can be easily deformed by the pressure element 2. One end of each of the resistance structures 11 extending in the axial direction forms a projection 111 that points radially outward to increase the overall thickness of each of the resistance structures 11.

[0017] The inner wall of the first fastening element 1 is radially provided with an inner flange 13. The inner flange 13 defines an opening 14. The maximum radial dimension of the pressure element 2 is larger than that of the opening 14 to prevent the pressure element 2 from completely penetrating the opening 14. The inner flange 13 is inserted through the opening 14 onto the front wheel fork stem 92. The inner flange 13 forms at least one through-hole 131. In this embodiment, it forms two through-holes 131. Each of the through-holes 131 is penetrated by a first screw 51. Each of the first screws 51 is screwed to the pressure element 2. By screwing the first screws 51 and the pressure element 2 together, the pressure element 2 can be moved in the axial direction relative to the first fastening element 1.

[0018] Preferably, the inner flange 13 forms a collar 15 that projects along the axial direction toward the pressure element 2. Two tongues 151 extend radially from the collar 15, forming the through holes 131 to increase the structural strength of the through holes 131.

[0019] The present invention further comprises a second fastening element 3. The second fastening element 3 is arranged on the front fork stem 92 in a rotationally fixed manner. The second fastening element 3 is provided with at least one second blocking section 31. The headset also comprises a bearing 6. The bearing 6 is placed around the front fork stem 92. The bearing 6 is clamped between the first fastening element 1 and the second fastening element 3 to enable the first fastening element 1 and the second fastening element 3 to rotate smoothly relative to one another. In particular, in this embodiment, the second fastening element 3 is detachably arranged on the front fork stem 92. In other embodiments, the second fastening element 3 can also be formed integrally on the front fork stem 92. In particular, the first fastening element 1 has a radially outer flange 16.The outer flange 16 presses in the axial direction on one side against the head tube 91 and on the other side against the bearing 6 in order to position the first fastening element 1 on the head tube 91.

[0020] Here, the second fastening element 3 is provided with two second blocking sections 31 on the radial outside. The first fastening element 1 is provided with the first blocking section 12 on the radial inside. The two second blocking sections 31 each form a groove 32 facing one side of the first blocking section 12. Each of the grooves 32 is additionally provided with a locking element 33. The locking element 33 can prevent the first blocking section 12 from colliding with the second blocking sections 31 and becoming worn. Furthermore, the locking element 33 can be replaced after extended use.

[0021] Specifically, the second fastening element 3 is a C-ring. The second fastening element 3 forms a radial slot 34. A projection 35 is provided on each side of the slot 34, each of which has a screw hole 36. A second screw 52 is screwed into the two screw holes 36. By turning the second screw 52, ​​the second fastening element 3 can clamp the front fork stem 92.

[0022] Fig. 7 to Fig. 9 show another embodiment of the present invention, wherein the pressure element 2A is provided with an external thread 53A. The inner wall of the inner flange 13A of the first fastening element 1A is provided with an internal thread 54A. The external thread 53A is screwed to the internal thread 54A. By rotating the pressure element 2A relative to the first fastening element 1A, the resistance structures 11 can be pressed, which is more convenient for assembly.

[0023] In this embodiment, the pressure element 2A is provided with a plurality of recesses 22A around the axial direction on the side facing away from the first fastening element. The recesses 22A serve for coupling with a control element 4. A polygonal raised piece 41 is provided at one end of the control element 4. The other end forms a plurality of projections 42 around the axial direction. The shape of the projections 42 corresponds to the shape of the recesses 22A. The raised piece 41 can be connected with a hand tool (such as a wrench). The control element 4 allows the user to rotate the pressure element 2A with less effort. List of reference symbols 1, 1A first fastening element 11 Resistance structure 111 lead 12 first blocking section 13, 13A inner flange 131 through hole 14 Opening 15 collars 151 Tongue 16 Outer flange 2, 2A pressure element 21 Inclined surface 22A recess 3 second fastening element 31 second blocking section 32 grooves 33 Locking element 34 slot 35 lead 36 screw holes 4 Control 41 raised piece 42 lead 51 first screw 52 second screw 53A external thread 54A internal thread 6 warehouses 91 Head tube 92 front fork shaft

Claims

[1] A headset of a bicycle mountable on a head tube set, the head tube set comprising a head tube (91) and a front fork stem (92) rotatable relative to the axial direction, with a first fastening element (1) arranged in a rotationally fixed manner on the inner wall of the head tube (91) and having at least one resistance structure (11) and a first blocking portion (12), the resistance structures (11) protruding from the first fastening element (1) along the axial direction and being arranged in an annular manner and spaced from one another, one end of each of the resistance structures (11) extending in the axial direction forming a projection (111) pointing radially outward, and at least one pressure element (2) capable of pressing the at least one resistance structure (11) and increasing the radial dimension of the resistance structure (11), whereinwhen the first fastening element (1) and the front wheel fork shaft (92) are rotated relatively, the at least one first blocking section (12) and the at least one second blocking section (31) on the front wheel fork shaft (92) can block each other. [2] Headset of a bicycle according to claim 1, characterized by that an inclined surface (21) is provided on the outer wall of the pressure element (2) or the resistance structure (11), wherein, when the pressure element (2) is moved in the direction of the first fastening element (1), the inclined surface (21) can increase the radial dimension of the resistance structure (11). [3] Headset of a bicycle according to claim 1, characterized byin that the inner wall of the first fastening element (1) is provided radially with an inner flange (13), wherein the inner flange (13) defines an opening (14), wherein the maximum radial dimension of the pressure element (2) is larger than that of the opening (14), wherein the inner flange (13) is inserted through the opening (14) onto the front wheel fork shaft (92), wherein the inner flange (13) forms at least one through-hole (131), wherein each of the through-holes (131) is penetrated by a first screw (51), wherein each of the first screws (51) is screwed to the pressure element (2). [4] Headset of a bicycle according to claim 3, characterized by that the inner flange (13) forms a collar (15) which projects along the axial direction towards the pressure element (2), wherein two tongues (151) which form the through holes (131) extend radially from the collar (15). [5] Headset of a bicycle according to claim 1, characterized byin that the inner wall of the first fastening element (1A) is provided radially with an inner flange (13A), wherein the inner flange (13A) defines an opening (14), wherein the maximum radial dimension of the pressure element (2A) is larger than that of the opening (14), wherein the inner flange (13A) is inserted through the opening (14) onto the front wheel fork shaft (92), wherein the pressure element (2A) is provided with an external thread (53A), wherein the inner wall of the inner flange (13A) of the first fastening element (1A) is provided with an internal thread (54A), wherein the external thread (53A) is screwed to the internal thread (54A). [6] Headset of a bicycle according to claim 5, characterized bythat the pressure element (2A) is provided on the side facing away from the first fastening element with a plurality of recesses (22A) around the axial direction, wherein the recesses (22A) serve for coupling with a control element (4), wherein a polygonal raised piece (41) is provided at one end of the control element (4), wherein the other end forms a plurality of projections (42) around the axial direction, wherein the shape of the projections (42) corresponds to the shape of the recesses (22A). [7] Headset of a bicycle according to one of claims 1 to 6, characterized bya second fastening element (3) which is arranged in a rotationally fixed manner on the front wheel fork shaft (92), wherein the second fastening element (3) is provided with the at least one second blocking section (31), wherein the headset further comprises a bearing (6), wherein the bearing (6) can be placed around the front wheel fork shaft (92), wherein the bearing (6) is clamped between the first fastening element (1) and the second fastening element (3). [8] Headset of a bicycle according to claim 7 characterized by in that the second fastening element (3) is provided radially outwardly with two second blocking sections (31), wherein the first fastening element (1) is provided radially inwardly with the first blocking section (12), wherein the two second blocking sections (31) each form a groove (32) facing one side of the first blocking section (12), wherein each of the grooves (32) is additionally provided with a locking element (33). [9] Headset of a bicycle according to claim 4, characterized bythat an inclined surface (21) is provided on the outer wall of the pressure element (2) or the resistance structure (11), wherein, when the pressure element (2) is moved towards the first fastening element (1), the inclined surface (21) can increase the radial dimension of the resistance structure (11); that the resistance structures (11) protrude from the first fastening element (1) along the axial direction and are arranged in a ring shape and spaced from one another, wherein one end of each of the resistance structures (11) extending in the axial direction forms a projection (111) pointing radially outwards;that a second fastening element (3) is provided which is arranged in a rotationally fixed manner on the front wheel fork shaft (92), wherein the second fastening element (3) is provided with at least one second blocking section (31), wherein the headset also comprises a bearing (6), wherein the bearing (6) can be placed around the front wheel fork shaft (92), wherein the bearing (6) is clamped between the first fastening element (1) and the second fastening element (3); that the second fastening element (3) is provided radially outwardly with two second blocking sections (31), wherein the first fastening element (1) is provided radially inwardly with the first blocking section (12), wherein the two second blocking sections (31) each form a groove (32) which faces one side of the first blocking section (12), wherein each of the grooves (32) is additionally provided with a locking element (33);that the second fastening element (3) is a C-ring, wherein the second fastening element (3) radially forms a slot (34), wherein on each of the two sides of the slot (34) there is a projection (35) which is provided with a screw hole (36), wherein a second screw (52) is screwed into the two screw holes (36), that the first fastening element (1) radially has an outer flange (16), wherein the outer flange (16) presses in the axial direction on one side against the head tube (91) and on the other side against the bearing (6); and that the pressure element (2) is provided with the inclined surface (21), wherein the inclined surface (21) increases in the opposite direction to the first fastening element (1).

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