A built-in seat tube lock structure

Abstract

The utility model relates to a kind of inner-hiding seat tube locking structure. Including saddle tube and seat tube;Seat tube is constituted by seat tube main pipe and the seat tube rear pipe located in its rear portion, notch is equipped on the top mouth rear wall of seat tube main pipe, locking pedestal is equipped in the top mouth inside of seat tube rear pipe, locking pedestal has the longitudinal section of L shape shape, the bottom front portion of locking pedestal is located in notch, the rear wall of locking pedestal and the top mouth inner wall of seat tube rear pipe abut, locking pressing block is equipped on locking pedestal, threaded hole is equipped on locking pedestal, counterbore connecting hole is equipped in the corresponding position on the top mouth rear wall of seat tube rear pipe, anti-disassembly locking screw is equipped in counterbore connecting hole, the middle portion of anti-disassembly locking screw is located in the threaded hole on locking pedestal and front end abuts on the rear wall of locking pressing block. The utility model provides a kind of inner-hiding seat tube locking structure, not subjected to knock effect also not easy to loosen by oneself, improve the ability of theft prevention and improve the aesthetic effect of bicycle.

Description

Technical Field

[0001] This utility model belongs to the field of bicycle technology, and in particular relates to a concealed seat post locking structure. Background Technology

[0002] Bicycles are playing an increasingly important role in people's lives, providing a means for fitness and daily commuting. Structurally, a seatpost is located in the middle of the bicycle frame, and the saddle is mounted on top of a seatpost. The lower end of the seatpost is inserted into the seatpost. A locking mechanism is installed at the upper end of the seatpost. After adjusting the height of the seatpost and saddle to a suitable level, the locking mechanism is engaged to lock the seatpost in place. Once locked, the seatpost is reliably fixed, and the saddle remains at its current height. The traditional seatpost locking mechanism is a locking clip located at the upper end of the seatpost, also known as a quick-release clip or seatpost clamp. It has a rotatable support arm. By operating the support arm, the main body of the clip can be tightened or loosened. When tightened, it creates a stable clamping effect on the upper end of the seatpost against the saddlepost.

[0003] The aforementioned locking structure has the following drawbacks: First, the locking buckle is exposed, making it easy to be manipulated arbitrarily or to loosen on its own under impact or vibration, resulting in the inability to maintain the seat height; second, the locking buckle lacks anti-disassembly functionality, making the seat easy to lose; third, the exposed locking opening is not aesthetically pleasing. Therefore, it is necessary to develop and design an internal seatpost locking structure to solve the aforementioned problems. Utility Model Content

[0004] The purpose of this invention is to provide a concealed seatpost locking structure that is not subject to impacts and is not easily loosened on its own, thereby improving anti-theft capabilities and enhancing the aesthetics of the bicycle.

[0005] The technical solution adopted by this utility model is as follows: an internal seat post locking structure, including a saddle tube and a seat post; the seat post consists of a main seat post and a rear seat post located behind it. A notch is provided on the rear wall of the top opening of the main seat post, and a locking base is provided inside the top opening of the rear seat post. The locking base has an L-shaped longitudinal section, with the front bottom of the locking base located inside the notch. The rear wall of the locking base abuts against the inner wall of the top opening of the rear seat post. A locking pressure block is provided on the locking base, and a threaded hole is provided on the locking base. A countersunk connecting hole is provided at a corresponding position on the rear wall of the top opening of the rear seat post. An anti-disassembly locking screw is provided in the countersunk connecting hole. The middle part of the anti-disassembly locking screw is located in the threaded hole on the locking base, and the front end abuts against the rear wall of the locking pressure block.

[0006] Preferably, the locking base is provided with two threaded holes, and the rear wall of the top opening of the seat tube is provided with two countersunk connecting holes, and the anti-disassembly locking screw is provided with two screws, one upper and one lower.

[0007] Preferably, the main seat tube and the rear seat tube are both integrally extruded aluminum alloy profiles, and the notch is formed by milling away a portion of the rear wall of the top opening of the main seat tube.

[0008] Preferably, it also includes a cover with a window in the middle, the bottom of the cover having a bottom lip extending downward and the outline of the bottom lip matching the outline of the top opening of the seat tube, the bottom of the cover being fastened to the top opening of the seat tube, and the saddle tube being located inside the window of the cover.

[0009] The advantages and positive effects of this utility model are:

[0010] This invention provides a concealed seat post locking structure, achieving a concealed structural design. This locking structure uses an anti-tamper locking screw to fix and release the seat post. When the anti-tamper locking screw is rotated inward, its front end pushes the locking block forward, pressing it against the rear wall of the seat post, thus achieving stable fixation. Releasing the seat post simply requires loosening the anti-tamper locking screw, making operation convenient. Because of the anti-tamper locking screw, only personnel with specific disassembly tools can operate this locking structure, preventing unauthorized disassembly and thus enhancing the anti-theft capability of the seat assembly. The concealed locking structure only exposes the head of the anti-tamper locking screw externally, while the locking base and locking block are hidden internally. This effectively prevents the locking structure from being bumped or damaged. Furthermore, the method of using the anti-tamper locking screw to apply pressure to the locking block to lock the seat post ensures reliable locking and prevents it from easily loosening under impact or other disturbances. On the other hand, because this locking structure has a concealed design with few exposed parts, it can improve the overall aesthetics of the bicycle. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the external structure of this utility model, viewed from above;

[0012] Figure 2 This is a schematic diagram of the external structure of this utility model, from a lower perspective;

[0013] Figure 3 This is a cross-sectional structural schematic diagram of the present invention;

[0014] Figure 4 This is a cross-sectional view of the present invention in the locking position.

[0015] In the picture:

[0016] 1. Saddle tube; 2. Buckle cap; 3. Countersunk connection hole; 4. Anti-disassembly locking screw; 5. Rear seat tube; 6. Main seat tube; 7. Locking block; 8. Locking base; 9. Notch. Detailed Implementation

[0017] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0018] Please see Figure 1 and Figure 2 The concealed seat post locking structure of this utility model includes a saddle tube 1 and a seat post. The lower part of the saddle tube 1 is inserted into the seat post. The seat post consists of a main seat post 6 and a rear seat post 5 located behind it. That is, the seat post has two chambers, front and rear. The lower part of the saddle tube 1 is inserted into the inside of the main seat post 6, as shown in the figure. Both the saddle tube 1 and the main seat post 6 are round tubes. The outer diameter of the saddle tube 1 is slightly smaller than the inner diameter of the main seat post 6.

[0019] In this embodiment, the seat tube main tube 6 and the seat tube rear tube 5 are both integrally extruded aluminum alloy profiles. The aluminum alloy material is integrally extruded on an extruder, and then the aforementioned dual-cavity aluminum alloy profile is cut into segments according to the design of the vehicle model.

[0020] Please see Figure 3 and Figure 4 It can be seen that:

[0021] A notch 9 is provided on the rear wall of the top opening of the main tube 6. As mentioned above, the tube is a double-cavity aluminum alloy profile with an integral extrusion structure. Therefore, after the aluminum alloy profile is cut into sections, a portion of the rear wall of the top opening of the main tube 6 is removed by milling to form the notch 9.

[0022] A locking base 8 is provided inside the top opening of the seat tube rear tube 5. The locking base 8 has an L-shaped longitudinal section. The bottom front part of the locking base 8 is located inside the notch 9. The rear wall of the locking base 8 abuts against the inner wall of the top opening of the seat tube rear tube 5.

[0023] A locking block 7 is provided on the locking base 8, and a threaded hole is provided on the locking base 8. A countersunk connecting hole 3 is provided at a corresponding position on the rear wall of the top opening of the seat tube 5. An anti-tamper locking screw 4 is provided in the countersunk connecting hole 3. The middle part of the anti-tamper locking screw 4 is located in the threaded hole on the locking base 8, and the front end abuts against the rear wall of the locking block 7. When the anti-tamper locking screw 4 is rotated in the forward direction, the anti-tamper locking screw 4 moves forward and pushes the locking block 7 forward. The locking block 7 presses against the rear wall of the saddle tube 1, thereby fixing the saddle tube 1. Conversely, when the anti-tamper locking screw 4 is rotated in the reverse direction, the anti-tamper locking screw 4 moves backward, and the pushing action on the locking block 7 disappears. The saddle tube 1 is then released, and the saddle tube 1 and its saddle seat can be adjusted in height. After adjustment, the anti-tamper locking screw 4 can be tightened again.

[0024] The anti-tamper locking screw 4 can only be operated with a matching tool, thus preventing arbitrary disassembly.

[0025] In this embodiment, the locking base 8 is provided with two threaded holes, and the rear wall of the top opening of the seat tube 5 is provided with two countersunk connecting holes 3, and the anti-disassembly locking screw 4 is provided with two screws, one above the other.

[0026] In this embodiment, a cover 2 with a window in the middle is also included. The bottom of the cover 2 has a bottom lip extending downwards, and the outline of the bottom lip matches the outline of the top opening of the seat tube. The bottom of the cover 2 is fastened to the top opening of the seat tube (seat tube main 6 and seat tube rear 5), and the saddle tube 1 is located inside the window of the cover 2. The cover 2 further seals the top opening of the seat tube, which can further improve the aesthetic effect and prevent foreign objects from entering the interior of the seat tube.

[0027] The lifting and lowering adjustment method of saddle tube 1 and its saddle seat:

[0028] Using a matching tool, loosen the upper and lower anti-disassembly locking screws 4. The locking block 7 will then lose its pressing and fixing effect on the saddle tube 1. At this time, the saddle tube 1 and its saddle seat can be raised and lowered. After adjusting to a suitable height, use a tool to tighten the upper and lower anti-disassembly locking screws 4 again. The locking block 7 will then press against the rear wall of the saddle tube 1 again, providing a stable fixing effect for the saddle tube 1.

Claims

1. A concealed seatpost locking structure, comprising a saddle tube (1) and a seatpost; characterized in that: The seat tube consists of a main seat tube (6) and a rear seat tube (5) located behind it. A notch (9) is provided on the rear wall of the top opening of the main seat tube (6). A locking base (8) is provided inside the top opening of the rear seat tube (5). The locking base (8) has an L-shaped longitudinal section. The front bottom of the locking base (8) is located inside the notch (9). The rear wall of the locking base (8) abuts against the inner wall of the top opening of the rear seat tube (5). A locking block (7) is provided on the locking base (8). A threaded hole is provided on the locking base (8). A countersunk connecting hole (3) is provided at the corresponding position on the rear wall of the top opening of the rear seat tube (5). An anti-disassembly locking screw (4) is provided in the countersunk connecting hole (3). The middle part of the anti-disassembly locking screw (4) is located in the threaded hole on the locking base (8) and the front end abuts against the rear wall of the locking block (7).

2. The concealed seat locking structure as described in claim 1, characterized in that: The locking base (8) is provided with two threaded holes, and the rear wall of the top opening of the seat tube (5) is provided with two countersunk connecting holes (3), and the anti-disassembly locking screw (4) is provided with two holes, one above the other.

3. The concealed seat locking structure as described in claim 2, characterized in that: The seat tube main tube (6) and the seat tube rear tube (5) are both aluminum alloy profiles with an integral extrusion structure. The notch (9) is formed by milling away a part of the rear wall of the top opening of the seat tube main tube (6).

4. The concealed seat post locking structure as described in claim 3, characterized in that: It also includes a cover (2) with a window in the middle, the bottom of the cover (2) has a bottom lip extending downward and the outline of the bottom lip is adapted to the outline of the top opening of the seat tube, the bottom of the cover (2) is fastened to the top opening of the seat tube, and the saddle tube (1) is located inside the window of the cover (2).

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