Manufacturing method of bicycle handlebar and product using manufacturing method

Abstract

The invention relates to a manufacturing method of a bicycle handlebar and a product using the manufacturing method, and the manufacturing method comprises the following steps: preparing a first core shaft and a plurality of first carbon fiber layers, and wrapping the first core shaft with the plurality of first carbon fiber layers to form a first component; a second mandrel and a plurality of second carbon fiber layers are prepared, an assembling groove is formed in the second mandrel in a concave mode, the first component is contained in the assembling groove, and then the second carbon fiber layers are used for wrapping the first component to form a second component; the second core shaft is taken out from the second component to form a component to be assembled and connected, and the component to be assembled and connected comprises a second pipeline which originally surrounds the second core shaft; preparing a concatenation piece and the two to-be-assembled components, and respectively inserting two ends of the concatenation piece into the second pipelines of the two to-be-assembled components to obtain a preformed pipe; the preformed pipe is placed in a mold to be formed through a heating and pressurizing procedure; and the first core shaft of each component to be assembled is pulled away to form a first pipeline, and a finished product is obtained.

Description

Technical Field

[0001] The invention relates to a bicycle tube, and in particular to a method for manufacturing a bicycle handlebar and a product using the manufacturing method. Background Art

[0002] A bicycle is equipped with various control cables to enable the rider to control various mechanisms from the handlebars, such as the brake mechanism, the gearshift mechanism, etc. The traditional method is to route the control cables along the outside of the frame. This wiring method makes the control cables easily damaged by being pulled or hit by foreign objects or bystanders. In addition, this wiring method often has the problem of messy cables, which not only affects the action response, but also affects the overall appearance of the bicycle.

[0003] Therefore, some businesses have adopted an internal wiring method of inserting the control line into the frame. However, although this method can effectively improve the shortcomings of external lines, it still has some shortcomings, for example but not limited to, during the threading process, it is impossible to accurately grasp the direction of the control line in the tube, which indirectly makes it difficult for the control line to pass out. In addition, when there are other components or wires in the tube, the control line is easily blocked and tangled in the tube and cannot move smoothly.

[0004] Therefore, it is necessary to provide a novel and progressive method for manufacturing a bicycle handlebar and a product using the manufacturing method to solve the above-mentioned problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a method for manufacturing a bicycle handlebar and a product using the manufacturing method, which can generate a bicycle tube having a first pipe and a second pipe. The first pipe can form an exclusive space for the control line to pass through and can effectively guide the direction of the control line, so that the control line can form an internal wiring configuration on the bicycle.

[0006] To achieve the above-mentioned purpose, the present invention provides a method for manufacturing a bicycle handlebar, which includes the following steps: preparing a first mandrel and a plurality of first carbon fiber layers, and covering the first mandrel with the plurality of first carbon fiber layers to form a first component; preparing a second mandrel and a plurality of second carbon fiber layers, the second mandrel being concavely provided with an assembly groove, accommodating the first component in the assembly groove, and then covering it with the plurality of second carbon fiber layers to form a second component; taking the second mandrel out of the second component to form a component to be assembled, the component to be assembled includes a second pipe originally surrounding the second mandrel; preparing a connecting piece and two components to be assembled, so that the two ends of the connecting piece are respectively inserted into the second pipes of the two components to be assembled to obtain a preformed tube; placing the preformed tube into a mold and forming it through a heating and pressurizing process; extracting the first mandrel of each component to be assembled to form a first pipe to obtain a finished product.

[0007] The first core shaft includes a first inner core and a first plastic layer, and the first plastic layer covers the first inner core.

[0008] The second core shaft further comprises a screw rod, a second inner core and a second plastic layer. The second inner core covers the screw rod, and the second plastic layer covers the second inner core.

[0009] The second pipe includes a large diameter section and a small diameter section. A step portion is formed between the large diameter section and the small diameter section. The large diameter section is used to accommodate part of the serial connection piece. The step portion and the serial connection piece abut against each other to stop.

[0010] The two ends of the two first pipes are respectively formed with a first through-hole and a second through-hole on the preformed tube; wherein the two first through-holes are interconnected on the tube wall of the preformed tube to form a third through-hole.

[0011] In the opening direction perpendicular to the third through-hole, the opening length of the third through-hole is smaller than the length of the serial connection element.

[0012] The manufacturing method of the bicycle handlebar further comprises the following steps: preparing a plurality of third carbon fiber layers, and covering the joints of the two components to be assembled with the plurality of third carbon fiber layers to obtain the preformed tube.

[0013] In the direction in which the serial connection piece is inserted into the second pipe, the serial connection piece is located within the covering range of the plurality of third carbon fiber layers.

[0014] The first mandrel includes a first inner core and a first plastic layer, and the first plastic layer covers the first inner core; the second mandrel also includes a screw, a second inner core and a second plastic layer, the second inner core covers the screw, and the second plastic layer covers the second inner core; the second pipe includes a large diameter section and a small diameter section, a step is formed between the large diameter section and the small diameter section, the large diameter section is used to accommodate part of the serial connection, and the step and the serial connection are mutually abutted and stopped; the serial connection is a hollow pipe; the manufacturing method of the bicycle handlebar also includes the following steps: preparing a plurality of third carbon fiber layers, and the plurality of third carbon fiber layers are covered with the joints of the two components to be assembled to obtain the preformed tube; in the direction in which the serial connection is inserted into the second pipe, the serial connection is located within the covering range of the plurality of third carbon fiber layers; the material of the first inner core is silicone; the material of the second inner core is silicone; the material of the serial connection is carbon fiber.

[0015] To achieve the above-mentioned purpose, the present invention further provides a bicycle handlebar manufactured by the above-mentioned bicycle handlebar manufacturing method, which comprises: two assembly components, a serial connection piece and a reinforcing body. Each of the assembly components comprises an outer tube body and an inner tube body, the outer tube body is composed of a plurality of second carbon fiber layers and surrounds a second pipe, the inner tube body is positioned on the inner wall of the second pipe, the inner tube body is composed of a plurality of first carbon fiber layers and surrounds a first pipe, the inner tube body comprises at least one first through-hole and a plurality of second through-holes respectively opened in the outer tube body; the serial connection piece is respectively inserted into the second pipes of the two assembly components; the reinforcing body is composed of a plurality of third carbon fiber layers, and the reinforcing body covers the joint between the two assembly components.

[0016] Beneficial effects of the present invention: A method for manufacturing a bicycle handlebar obtained by the present invention and a product using the manufacturing method can generate a bicycle pipe having a first pipe and a second pipe. The first pipe can form an exclusive space for the control line to pass through and can effectively guide the direction of the control line, so that the control line can form an internal wiring configuration on the bicycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 4 is a schematic diagram of a first component and a second core shaft according to an embodiment of the present invention.

[0018] Figures 2 to 4 This is a diagram showing the steps of manufacturing components to be assembled according to an embodiment of the present invention.

[0019] Figure 5 FIG. 4 is a schematic diagram of a bicycle handlebar according to an embodiment of the present invention.

[0020] Figure 6 for Figure 5 A partial cross-sectional view of .

[0021] 1: First mandrel

[0022] 12: First inner core

[0023] 13: First plastic layer

[0024] 2: Second mandrel

[0025] 21: Assembly slot

[0026] 22: Screw

[0027] 23: Second inner core

[0028] 24: Second plastic layer

[0029] 31: First component

[0030] 32: Second component

[0031] 33: Components to be assembled

[0032] 4: Preformed tube

[0033] 41: First Pipeline

[0034] 42: Second pipeline

[0035] 421: Large diameter section

[0036] 422: Trail section

[0037] 423: Steps

[0038] 43: Serial connection

[0039] 44: First hole

[0040] 45: Second hole

[0041] 46: The third hole

[0042] 51: First carbon fiber layer

[0043] 52: Second carbon fiber layer

[0044] 53: The third carbon fiber layer

[0045] 61: Assembly components

[0046] 62: Outer tube body

[0047] 63:Inner tube body

[0048] 64: Reinforcement DETAILED DESCRIPTION

[0049] The following are only examples to illustrate possible implementations of the present invention, but are not intended to limit the scope of the present invention. The "one" or "at least one" preceding the nouns mentioned in the text does not limit the quantity, and it can also be "plural" according to needs. This change in quantity is also within the scope of the protection, which is stated in advance.

[0050] Please refer to Figures 1 to 6 , which shows an embodiment of the present invention, a method for manufacturing a bicycle handlebar of the present invention, which comprises the following steps:

[0051] A first mandrel 1 and a plurality of first carbon fiber layers 51 are prepared, and the first carbon fiber layers 51 are wrapped around the first mandrel 1 to form a first component 31. A second mandrel 2 and a plurality of second carbon fiber layers 52 are prepared, and the second mandrel 2 is provided with an assembly groove 21, and the first component 31 is accommodated in the assembly groove 21, and then wrapped with the plurality of second carbon fiber layers 52 to form a second component 32. The second mandrel 2 is taken out from the second component 32 to form a component to be assembled 33, and the component to be assembled 33 includes a second pipe 42 originally surrounding the second mandrel 2. Next, a connecting piece 43 and two components to be assembled 33 are prepared for assembly, and the two ends of the connecting piece 43 are respectively inserted into the second pipes 42 of the two components to be assembled 33 to obtain a preformed tube 4. Finally, the preformed tube 4 is placed in a mold and formed by a heating and pressing process, and finally, the first mandrel 1 of each component 33 to be assembled is extracted to form a first pipe 41, thereby obtaining a finished product. This method of obtaining the preformed tube 4 through assembly is quite suitable for symmetrical tubes and longer bicycle handlebars.

[0052] In detail, the two ends of the two first pipes 41 are respectively formed with a first through-hole 44 and a second through-hole 45 on the preformed tube 4, and the first through-hole 44 and the second through-hole 45 can allow the control line to pass through and out of the first pipe 41. The first pipe 41 can effectively provide an exclusive space for the control line to pass through to form an internal line, and the first pipe 41 can actually guide the direction of the control line, which is of great benefit to the threading operation; wherein, the two first through-holes 44 are interconnected on the tube wall of the preformed tube 4 to form a third through-hole 46 together, and the third through-hole 46 is rectangular, thereby allowing a larger margin space for threading and allowing the control line to have a more appropriate space for turning.

[0053] Preferably, in a direction perpendicular to the opening of the third through hole 46 , the opening length of the third through hole 46 is smaller than the length of the connecting member 43 , so as to ensure that the joint between the two components to be assembled 33 can maintain a better structural strength.

[0054] More preferably, the manufacturing method of the bicycle handlebar further includes the following steps: preparing a plurality of third carbon fiber layers 53, and covering the joints of the two components to be assembled 33 with the plurality of third carbon fiber layers 53 to obtain the preformed tube 4. In detail, the two components to be assembled 33 assembled into the preformed tube 4 are joined to each other at the inner side with the serial connector 43 provided for support, and the plurality of third carbon fiber layers 53 are covered on the outer side to strengthen the bonding strength of the joints, so that the joints can be stably and tightly connected to each other to resist external forces. In this embodiment, the material of the serial connector 43 is carbon fiber, and in the direction in which the serial connector 43 is inserted into the second pipe 42, the serial connector 43 is located within the covering range of the plurality of third carbon fiber layers 53, so that the plurality of third carbon fiber layers 53 can be strengthened in a large range in the outer layer, while the serial connector 43 is strengthened locally in the inner core.

[0055] The first mandrel 1 includes a first inner core 12 and a first plastic layer 13. The first plastic layer 13 covers the first inner core 12. The first mandrel 1 can be bent and deformed as required. The first inner core 12 controls the inner diameter and shape of the preformed first pipe 41, and the first plastic layer 13 allows the first mandrel 1 to be smoothly removed from the plurality of first carbon fiber layers 51. In this embodiment, the material of the first inner core 12 is silicone, and the first plastic layer 13 is a release film.

[0056] The second mandrel 2 further includes a screw 22, a second inner core 23 and a second plastic layer 24. The second inner core 23 covers the screw 22, and the second plastic layer 24 covers the second inner core 23. In this embodiment, the screw 22 is made of aluminum, the second inner core 23 is made of silicone, and the second plastic layer 24 is a release film.

[0057] It is worth mentioning that the second pipe 42 includes a large diameter section 421 and a small diameter section 422, and a step 423 is formed between the large diameter section 421 and the small diameter section 422. The large diameter section 421 is used to accommodate part of the serial connection member 43, and the step 423 and the serial connection member 43 abut against each other to stop, so that when the serial connection member 43 is inserted into the large diameter sections 421 of the two second pipes 42, the step 423 of the two second pipes 42 can clamp and limit the serial connection member 43. In this embodiment, the serial connection member 43 is a hollow pipe, so that the two second pipes 42 can be kept connected to facilitate the subsequent configuration of other components.

[0058] Here, a bicycle handlebar is provided, which is manufactured by the manufacturing method of the bicycle handlebar, and the bicycle handlebar comprises: two assembly components 61, a serial connection member 43 and a reinforcing body 64. Each of the assembly components 61 comprises an outer tube body 62 and an inner tube body 63, the outer tube body 62 is composed of a plurality of the second carbon fiber layers 52 and surrounds the second pipe 42, the inner tube body 63 is positioned on the inner wall of the second pipe 42, the inner tube body 63 is composed of a plurality of the first carbon fiber layers 51 and surrounds the first pipe 41, the inner tube body 63 comprises two first through-holes 44 and a plurality of the second through-holes 45 respectively opened in the outer tube body 62; the serial connection member 43 is respectively inserted into the second pipe 42 of the two assembly components 61; the reinforcing body 64 is composed of a plurality of the third carbon fiber layers 53, and the reinforcing body 64 covers the joint between the two assembly components 61.

Claims

1. A method for manufacturing a bicycle handle, characterized in that: It includes the following steps: A first core shaft and a plurality of first carbon fiber layers are prepared, and the first core shaft is covered with the plurality of first carbon fiber layers to form a first component; A second mandrel and a plurality of second carbon fiber layers are prepared, wherein the second mandrel is concavely provided with an assembly groove, the first component is accommodated in the assembly groove, and then the first component is covered with the plurality of second carbon fiber layers to form a second component; The second mandrel is removed from the second component to form a component to be assembled, wherein the component to be assembled includes a second pipe originally surrounding the second mandrel; Prepare a serial connection piece and two components to be assembled, and insert two ends of the serial connection piece into the second pipes of the two components to be assembled, respectively, to obtain a preformed tube; The preformed tube is placed in a mold and formed by a heating and pressurizing process; The first core shaft of each component to be assembled is pulled out to form a first pipeline to obtain a finished product.

2. The method for manufacturing a bicycle handlebar according to claim 1, wherein: The first core shaft includes a first inner core and a first plastic layer, and the first plastic layer covers the first inner core.

3. The method for manufacturing a bicycle handlebar according to claim 1, wherein: The second core shaft further comprises a screw rod, a second inner core and a second plastic layer. The second inner core covers the screw rod, and the second plastic layer covers the second inner core.

4. The method for manufacturing a bicycle handlebar according to claim 1, wherein: The second pipe includes a large diameter section and a small diameter section. A step portion is formed between the large diameter section and the small diameter section. The large diameter section is used to accommodate part of the serial connection piece. The step portion and the serial connection piece abut against each other to stop.

5. The method for manufacturing a bicycle handlebar according to claim 1, wherein: The two ends of the two first pipes are respectively formed with a first through-hole and a second through-hole on the preformed tube; wherein the two first through-holes are interconnected on the tube wall of the preformed tube to form a third through-hole.

6. The method for manufacturing a bicycle handlebar according to claim 5, wherein: In the opening direction perpendicular to the third through-hole, the opening length of the third through-hole is smaller than the length of the serial connection element.

7. The method for manufacturing a bicycle handlebar according to any one of claims 1 to 6, characterized in that: The method also includes the following steps: preparing a plurality of third carbon fiber layers, and covering the joints of the two components to be assembled with the plurality of third carbon fiber layers to obtain the preformed tube.

8. The method for manufacturing a bicycle handlebar according to claim 7, wherein: In the direction in which the serial connection piece is inserted into the second pipe, the serial connection piece is located within the covering range of the plurality of third carbon fiber layers.

9. The method for manufacturing a bicycle handlebar according to claim 6, wherein: The first mandrel includes a first inner core and a first plastic layer, and the first plastic layer covers the first inner core; the second mandrel also includes a screw, a second inner core and a second plastic layer, the second inner core covers the screw, and the second plastic layer covers the second inner core; the second pipe includes a large diameter section and a small diameter section, a step is formed between the large diameter section and the small diameter section, the large diameter section is used to accommodate part of the serial connection, and the step and the serial connection are mutually abutted and stopped; the serial connection is a hollow pipe; the manufacturing method of the bicycle handlebar also includes the following steps: preparing a plurality of third carbon fiber layers, and the plurality of third carbon fiber layers are covered with the joints of the two components to be assembled to obtain the preformed tube; in the direction in which the serial connection is inserted into the second pipe, the serial connection is located within the covering range of the plurality of third carbon fiber layers; the material of the first inner core is silicone; the material of the second inner core is silicone; the material of the serial connection is carbon fiber.

10. A bicycle handlebar, characterized in that: The product manufactured by the method for manufacturing a bicycle handlebar according to claim 7 comprises: Two assembly components, each of which includes an outer tube body and an inner tube body, the outer tube body is composed of a plurality of second carbon fiber layers and surrounds a second pipe, the inner tube body is positioned on the inner wall of the second pipe, the inner tube body is composed of a plurality of first carbon fiber layers and surrounds a first pipe, and the inner tube body includes at least one first through-hole and a plurality of second through-holes respectively opened on the outer tube body; A series connection piece, respectively plugged into the second pipes of the two connecting components; and A reinforcing body is formed by a plurality of third carbon fiber layers, and the reinforcing body covers the joints between the two assembled components.

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