Integrally formed aluminum alloy bicycle handlebar stem

Abstract

Disclosed in the present invention is an integrally formed aluminum alloy bicycle handlebar stem, mainly comprising a central portion, at least two bent connecting portions, two handle portions and a front fork connecting portion, wherein the two bent connecting portions are integrally connected to two ends of the central portion, respectively, and the two bent connecting portions are bent and extend forward relative to the central portion towards a bicycle rider as viewed from a riding perspective, wherein the distance from the central point of the central portion to the connecting point between each bent connecting portion and the central portion is not more than 20 centimeters (cm), the two handle portions are integrally connected to the two bent connecting portions, respectively, and the front fork connecting portion integrally protrudes at the central position of the central portion and can be used for fixed connection to a bicycle front fork tube.

Description

One-piece molded aluminum alloy bicycle handlebars Technical Field

[0001] This invention relates to a bicycle handlebar stem, specifically to a bicycle handlebar stem made of one-piece aluminum alloy. Background Technology

[0002] A bicycle is a mode of transportation that combines sports and leisure functions. Generally, a handlebar is set at the front of the bicycle and connected to the front fork tube of the front wheel. The rider controls the stability of the bicycle by holding the handlebar and controls the direction of the bicycle by turning the handlebar.

[0003] The existing bicycle handlebars are connected to the fork tube via a handlebar stem, as shown in Taiwan Patent No. M559274 (hereinafter referred to as the reference). However, this method of connecting the handlebar stem to the fork tube is not only structurally complex and has many components, but it is also quite inconvenient to manufacture and assemble. This may increase the overall manufacturing cost of the bicycle, and there is a real need for further improvement.

[0004] Summary of the Invention

[0005] Therefore, in view of the inconvenience and deficiencies in the existing connection structure between the handlebars and the fork tube of bicycles, the inventors of this invention have created an invention that can improve upon the existing deficiencies through continuous experimentation and research.

[0006] The main objective of this invention is to provide a one-piece molded aluminum alloy bicycle handlebar stem, which simplifies the overall structure of the bicycle and reduces the overall manufacturing cost of the bicycle.

[0007] To achieve the above objectives, the present invention provides a one-piece molded aluminum alloy bicycle handlebar stem, comprising:

[0008] One central department;

[0009] At least two or more bent connecting parts are integrally connected to both ends of the central part. The two bent connecting parts bend forward relative to the central part towards the cyclist from the riding perspective. The distance from the center point of the central part to the connection point between each bent connecting part and the central part does not exceed 20 centimeters.

[0010] Two handle sections, each integrally connected to one of the two bent connecting sections; and

[0011] A fork connector is integrally protruding from the center of the central part and can be used to fix it to the bicycle fork tube.

[0012] The aluminum alloy one-piece molded bicycle handlebar stem has a fork connection part having a body, a through hole penetrating the body, and a clamping seam recessed on the body and communicating with the through hole.

[0013] The aluminum alloy one-piece molded bicycle handlebar stem has an angle between the center line of each bent connecting part and the center line of the central part.

[0014] The aluminum alloy one-piece molded bicycle handlebar stem has an included angle that can be between 0° and 90°.

[0015] The aluminum alloy one-piece molded bicycle handlebar stem has the ends of the two handlebars extending slightly forward toward the cyclist from a riding perspective.

[0016] The aluminum alloy one-piece molded bicycle handlebar stem has each bent connecting part extending upward at an angle relative to the central part.

[0017] The aluminum alloy one-piece molded bicycle handlebar stem has two handle parts bent into a curved shape, so that the two handle parts are curved in an arc shape near the middle.

[0018] The aluminum alloy one-piece molded bicycle handlebars have a downward-curved arc-shaped middle section between the two handles.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] Through the above-mentioned technical means, the present invention allows the handlebars and fork tubes to be directly fixedly connected through an integrally formed fork connector, eliminating the need for the handlebar stem. Therefore, the manufacturing and assembly process of the handlebar stem can be omitted, which not only simplifies the overall structure of the bicycle, but also reduces the number of components and processes to be manufactured and assembled, thereby reducing the overall manufacturing cost of the bicycle. Attached Figure Description

[0021] Figure 1 is a perspective view of the first embodiment of the present invention.

[0022] Figure 2 is a top view of the first embodiment of the present invention.

[0023] Figure 3 is a three-dimensional view of the preform of the present invention.

[0024] Figure 4 is a side view of the rough blank processing of the present invention.

[0025] Figure 5 is a perspective view of the second embodiment of the present invention.

[0026] Figure 6 is a top view of the second embodiment of the present invention.

[0027] Figure 7 is a perspective view of the third embodiment of the present invention.

[0028] Fig. 8 is a top view of a third embodiment of the present application.

[0029] Fig. 9 is a perspective view of a fourth embodiment of the present application.

[0030] Fig. 10 is a top view of the fourth embodiment of the present application.

[0031] Fig. 11 is a perspective view of a fifth embodiment of the present application.

[0032] Fig. 12 is a top view of the fifth embodiment of the present application.

[0033] Fig. 13 is a perspective view of a sixth embodiment of the present application.

[0034] Fig. 14 is a top view of the sixth embodiment of the present application.

[0035] Symbol explanation:

[0036] 10, 10A, 10B, 10C, 10D, 10E: central portion

[0037] 12, 12A, 12B, 12C, 12D, 12E: handle portion

[0038] 14, 14A, 14B, 14C, 14D, 14E: bent connecting portion

[0039] 142: connecting point

[0040] 20: front fork connecting portion

[0041] 22: perforation

[0042] 24: clamping slit

[0043] θ: included angle DETAILED DESCRIPTION

[0044] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0045] The present application will be described in further detail below in conjunction with the drawings:

[0046] This invention provides a one-piece molded aluminum alloy bicycle handlebar stem. Referring to Figures 1 and 2, the one-piece molded aluminum alloy bicycle handlebar stem mainly comprises a central portion 10, at least two bent connecting portions 14, two handlebar portions 12, and a fork connecting portion 20. The two bent connecting portions 14 are integrally connected to both ends of the central portion 10. The two bent connecting portions 14 bend forward relative to the central portion 10 towards the cyclist from a riding perspective. The distance from the center point of the central portion 10 to the connection point 142 of each bent connecting portion 14 does not exceed 20 cm. (cm) is preferred. The two handlebar portions 12 are integrally connected to the two bent connecting portions 14, and the fork connecting portion 20 is integrally protruding from the center of the central portion 10 and can be used to fix it to the bicycle fork tube. The fork connecting portion 20 mainly has a body, on which a through hole 22 is provided and a clamping slot 24 is recessed on the body and communicates with the through hole 22. Thus, the top end of the bicycle fork tube can be passed through the through hole 22 on the fork connecting portion 20, and the clamping slot 24 is passed through by screws or quick-release structures to clamp and fix the fork tube, so that the handlebars can be fixedly connected to the fork tube.

[0047] The aluminum alloy one-piece molded bicycle handlebar stem of the present invention allows the handlebar and the fork tube to be directly fixedly connected through the fork connection part 20, without the need for the handlebar stem. Therefore, the manufacturing and assembly process of the handlebar stem can be omitted, which not only simplifies the overall structure of the bicycle, but also reduces the number of components and processes to be manufactured and assembled, thereby reducing the overall manufacturing cost of the bicycle.

[0048] Please refer to Figures 3 and 4. In the manufacturing process of this invention, a metal blank is first placed into a mold and forged into a rough blank as shown in Figure 3. The rough blank generally forms a central part 10 and a fork connection part 20. Then, the rough blank is placed into another mold, and two stamping dies are used to stamp the two ends of the central part 10, so that concave holes are formed at both ends of the central part 10 and gradually elongated, so that the central part 10 is hollow. Handle parts 12 are formed at both ends of the central part 10. In addition, through metal processing such as drilling and cutting, through holes 22 and clamping seams 24 are formed on the fork connection part 20. After appropriate metal processing such as tube shrinking and bending, a bent connection part 14 of appropriate shape is formed between the central part 10 and the handle part 12, thus completing the manufacturing of the handle of this invention.

[0049] Furthermore, the handlebar of the present invention can also be made by metal processing procedures such as forging, die casting, welding and cutting. The overall manufacturing is quite simple, the required technology is mature and convenient, and the complexity of the processing and forming of the present invention can be greatly reduced.

[0050] Please also refer to Figures 1 and 2. In the first embodiment of the present invention, each bent connecting portion 14 can also be inclined upward relative to the central portion. An angle θ is formed between the center line of each bent connecting portion facing forward from the rider's riding perspective and the center line of the central portion. The angle θ can be between 0° and 90°, so as to accommodate different riders to achieve the rider's better riding angle, and the ends of the two handlebar portions 12 extend slightly forward to form a handlebar shape that fits the appropriate rider's grip.

[0051] Please also refer to Figures 5 and 6. In the second embodiment of the present invention, the ends of the two handlebar portions 12A extend slightly forward toward the cyclist from the riding perspective, and the center line of each bent connecting portion 14A extending slightly forward toward the cyclist from the riding perspective forms an angle θ with the center line of the central portion 10A. The angle θ can be between 0° and 90°, thus forming another handlebar shape to accommodate different riders.

[0052] Please also refer to Figures 7 and 8. In the third embodiment of the present invention, a bent connecting portion 14B with a different angle is formed between the central portion 10B and the two handle portions 12B, and the ends of the two handle portions 12B extend slightly to the rear, thus forming another handlebar shape to accommodate different riders.

[0053] Please refer to Figures 9 and 10. In the fourth embodiment of the present invention, a bent connecting portion 14C with a different angle is formed between the central portion 10C and the two handle portions 12C, and the ends of the two handle portions 12C extend slightly to the rear, thus forming another handlebar shape to accommodate different riders.

[0054] Please refer to Figures 11 and 12. In the fifth embodiment of the present invention, a bent connecting portion 14D is formed between the central portion 10D and the two handle portions 12D, which are simultaneously horizontally inclined forward and upward, and the ends of the two handle portions 12D extend slightly backward to form another handlebar shape suitable for different riders.

[0055] Please also refer to Figures 13 and 14. In the sixth embodiment of the present invention, a horizontally inclined forward-bent connecting portion 14E is formed between the central portion 10E and the two handle portions 12E, and the two handle portions 12E are bent into a curved shape, so that the two handle portions 12E near the middle form a downward or upward arc bend, thereby forming a handlebar shape that can be used by different riders.

[0056] The handlebars of the present invention are not limited to the structure and shape of the two handlebar portions 12. Therefore, as long as a front fork connection portion 20 is integrally formed in the central portion 10, it falls within the scope of the present invention, and the present invention does not impose any limitations.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A one-piece molded aluminum alloy bicycle handlebar stem, characterized in that, It includes: One central department; At least two or more bent connecting parts are integrally connected to both ends of the central part. The two bent connecting parts are bent and extended forward toward the cyclist from the riding perspective relative to the central part. The distance between the center point of the central part and the connection point between each bent connecting part and the central part does not exceed 20 centimeters. Two handle sections, each integrally connected to one of the two bent connecting sections; and A fork connector is integrally protruding from the center of the central part and can be used to fix it to the bicycle fork tube.

2. The one-piece molded aluminum alloy bicycle handlebar as described in claim 1, characterized in that, The fork connector has a body, on which a through hole is provided and a clamping slot is recessed on the body and connected to the through hole.

3. The one-piece molded aluminum alloy bicycle handlebar stem as described in claim 1 or 2, characterized in that, An angle is formed between the centerline of each bend and the centerline of the central part.

4. The one-piece molded aluminum alloy bicycle handlebar stem as described in claim 3, characterized in that, The angles of each included angle are between 0° and 90°.

5. The one-piece molded aluminum alloy bicycle handlebar as described in claim 4, characterized in that, The ends of both handlebars extend forward toward the cyclist from a riding perspective.

6. The one-piece molded aluminum alloy bicycle handlebar as described in claim 5, characterized in that, Each bend and connection point extends upward at an angle relative to the central part.

7. The one-piece molded aluminum alloy bicycle handlebar stem as described in claim 1 or 2, characterized in that, The ends of both handles extend forward.

8. The one-piece molded aluminum alloy bicycle handlebar stem as described in claim 1 or 2, characterized in that, Each bend and connection point extends upward at an angle relative to the central part.

9. The one-piece molded aluminum alloy bicycle handlebar stem as described in claim 1 or 2, characterized in that, The two handles are bent into a curved shape, so that the middle part of the two handles is curved.

10. The one-piece molded aluminum alloy bicycle handlebar as described in claim 9, characterized in that, The middle part of both handles curves downwards in an arc.

11. The one-piece molded aluminum alloy bicycle handlebar stem as described in claim 10, characterized in that, An angle is formed between the centerline of each bend and the centerline of the central part.

12. The one-piece aluminum alloy bicycle handlebar stem as described in claim 11, characterized in that, The angles of each included angle are between 0° and 90°.

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