Bicycle with adjustable seat

Abstract

The utility model discloses a bicycle with an adjustable seat, which comprises a first front bicycle frame and a rear bicycle frame, a second front bicycle frame is fixed at the rear end of the first front bicycle frame, a third front bicycle frame is fixed at the front end of the first front bicycle frame, a fourth front bicycle frame is fixed at the bottom end of the second front bicycle frame, and a shock absorber is arranged between the second front bicycle frame and the rear bicycle frame. A bicycle seat is arranged at the top of the first front frame, guide sleeves are symmetrically fixed to the two sides of the bottom of the bicycle seat and slidably connected to the two sides of the third front frame, an adjusting mechanism used for driving the bicycle seat to move front and back is arranged in the third front frame, and a crank used for driving the adjusting mechanism is arranged on one side of the third front frame. According to the bicycle with the adjustable seat, the bicycle seat is driven by the adjusting mechanism to move front and back, so that the front-back position of the bicycle seat is adjusted, the bicycle can adapt to riders with different heights, and the riding comfort is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of bicycle, especially a bicycle with adjustable seat. BACKGROUND

[0002] In the 19th century, bicycles have undergone several technical innovations. Initially, people made bicycles able to turn by adding a steering mechanism to the front wheel. Later, they achieved the function of moving forward by pedaling with both feet by installing pedals on the front or rear wheel shaft. With the development of the industrial revolution, the miniaturization of transmission devices was realized, and the combination of gears and chains made bicycles more effective in utilizing physical energy. Three-wheeled bicycles added an auxiliary wheel to the bicycle, usually at the rear, which improved the balance and stability of the bicycle, making it easier for beginners to learn to ride. Front three-wheeled bicycles are a special design with two auxiliary wheels at the front and a power wheel at the rear.

[0003] The front three-wheeled bicycle with publication number CN101407234A has two smaller wheels in front and one larger wheel at the back. The height of the seat is the same as that of a chair at home, and the wide seat and backrest are in the middle of the three wheels, providing comfort, stability, and a sense of security. When turning, the body automatically inclines inward to counteract the centrifugal force, preventing the bicycle from tipping over. The two balance springs have moderate strength, keeping the direction stable, and the rider can easily hold the handlebars without exerting much force. Today's urban elderly population has a good living condition and mindset, and they have high expectations for health. Therefore, the seat-type front three-wheeled bicycle designed for the elderly has a stable and broad market.

[0004] Based on the above patent search and combined with the existing technology, it is found that the current bicycle seat design has limitations, lacking adjustment function, which makes it difficult to adapt to riders of different heights, thereby affecting the comfort during riding. Therefore, it is necessary to optimize the seat design to improve its adaptability to users of different heights and overall riding experience. INVENTION CONTENTS

[0005] Therefore, it is necessary to provide a bicycle with an adjustable seat to solve the above technical problems. By rotating the handlebars to drive the adjustment mechanism, the bicycle seat is moved forward and backward by the adjustment mechanism, thereby adjusting the front and rear positions of the bicycle seat. This makes the device adaptable to riders of different heights, which is beneficial to increase the comfort of riding.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The adjustable seat bicycle specifically comprises a first front frame, a rear frame, a second front frame fixed to the rear end of the first front frame, a third front frame fixed to the front end of the first front frame, a fourth front frame fixed to the bottom end of the second front frame, a rotating connection between the front end of the rear frame and the bottom of the first front frame, a shock absorber arranged between the second front frame and the rear frame, a bicycle seat arranged at the top of the first front frame, symmetrical guide sleeves fixed to the bottom of the bicycle seat, sliding connection of the guide sleeves to the two sides of the third front frame, an adjusting mechanism arranged in the third front frame for driving the bicycle seat to move forward and backward, and a crank handle arranged on one side of the third front frame for driving the adjusting mechanism.

[0008] As a preferred embodiment of the adjustable seat bicycle, the adjusting mechanism comprises a threaded rod, a stabilizing seat fixed in the interior of one end of the fourth front frame close to the third front frame, a mounting frame inserted into the interior of one end of the third front frame close to the fourth front frame, rotating connection of the threaded rod between the stabilizing seat and the mounting frame, a transmission assembly arranged in the interior of the mounting frame for driving the threaded rod to rotate, a threaded sleeve threadedly connected to the surface of the threaded rod, a connecting piece fixed to the surface of the threaded sleeve, and fixation of the connecting piece to the bottom of the bicycle seat.

[0009] As a preferred embodiment of the adjustable seat bicycle, one side of the interior of the third front frame is fixed with a limiting block, a guide groove is arranged on one side of the mounting frame and at a position corresponding to the limiting block, and the limiting block is slidingly connected in the interior of the guide groove.

[0010] As a preferred embodiment of the adjustable seat bicycle, one end of the mounting frame close to the fourth front frame is rotatably connected with a fixing cover, and the fixing cover is threadedly fixed to the outside of one end of the third front frame close to the fourth front frame.

[0011] As a preferred embodiment of the adjustable seat bicycle, the transmission assembly comprises a transmission rod, the transmission rod is rotatably connected in the interior of the mounting frame, one end of the transmission rod is fixed to the threaded rod, the other end of the transmission rod is fixed with a first bevel gear, one side of the interior of one end of the mounting frame away from the fourth front frame is fixed with a fixing sleeve, one end of the fixing sleeve is rotatably connected with a second bevel gear, a rotating shaft is rotatably connected in the interior of the fixing sleeve, and the rotating shaft is fixed to the second bevel gear.

[0012] As a preferred embodiment of the utility model provides a seat adjustable bicycle, one side of the third front frame and located in the position corresponding to the handlebar is equipped with second reserved hole, one side of the mounting frame and located in the position corresponding to second reserved hole is equipped with first reserved hole, the inside of the rotating shaft and located in the position corresponding to first reserved hole is equipped with internal hexagonal hole, one end of the handlebar is fixed with external hexagonal rocker, the external hexagonal rocker is inserted in the inside of internal hexagonal hole through second reserved hole and first reserved hole.

[0013] As a preferred embodiment of the utility model provides a seat adjustable bicycle, the inside of internal hexagonal hole is fixed with magnet.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1, by rotating the handlebar to drive adjusting mechanism, by adjusting mechanism drives bicycle seat to move back and forth, thereby adjusting the front and back position of bicycle seat, so that the device can adapt to different height of rider, be favorable to increase the comfort of riding.

[0016] 2, by the setting of internal hexagonal hole and external hexagonal rocker, the handlebar and rotating shaft are separated, which is favorable to reduce the risk of leg and handlebar scratching during riding, and is favorable to increase the safety of riding.

[0017] 3, by magnet attracting external hexagonal rocker, thereby reducing the risk of accidental falling of handlebar, which is favorable to increase the use effect of the device. DRAWINGS

[0018] In order to more clearly illustrate the scheme in the utility model, the following will be a brief introduction to the drawings needed to be used in the embodiment description, obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creating labor.

[0019] Figure 1 It is the overall structure schematic view of the utility model;

[0020] Figure 2 It is the overall structure schematic view of the utility model Figure 1 It is the structure schematic view of local amplification;

[0021] Figure 3 It is the structure schematic view of the first front frame inside the utility model;

[0022] Figure 4 It is the structure schematic view of adjusting mechanism and third front frame separation of the utility model;

[0023] Figure 5 is a structure diagram of the inside of the mounting frame of the utility model;

[0024] Figure 6 is a structure diagram of the inside of the rotating shaft of the utility model.

[0025] The mark in the figure is explained as follows:

[0026] 1, first front frame; 2, rear frame; 3, second front frame; 4, shock absorber; 5, guide groove; 6, bicycle seat; 7, third front frame; 8, crank handle; 9, guide sleeve; 10, transmission rod; 11, fourth front frame; 12, connecting piece; 13, stabilizing seat; 14, threaded sleeve; 15, threaded rod; 16, fixing cover; 17, mounting frame; 18, first reserved hole; 19, limiting block; 20, second reserved hole; 21, outer hexagonal rocker; 22, first bevel gear; 23, fixing sleeve; 24, second bevel gear; 25, rotating shaft; 26, magnet; 27, inner hexagonal hole. DETAILED DESCRIPTION

[0027] are not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor should belong to the protection scope of the utility model.

[0028] In order to make the personnel in this technical field better understand the utility model scheme, the technical scheme in the utility model embodiments will be described clearly and completely below in combination with the drawings.

[0029] It should be noted that the embodiments in the utility model and the features and technical schemes in the embodiments can be combined with each other without conflict.

[0030] Please refer to Figures 1-6 ,

[0031] The device comprises a first front frame 1 and a rear frame 2, the rear end of the first front frame 1 is fixed with a second front frame 3, the front end of the first front frame 1 is fixed with a third front frame 7, the bottom end of the second front frame 3 is fixed with a fourth front frame 11, the front end of the rear frame 2 is rotatably connected with the bottom of the first front frame 1, specifically, the first front frame 1 is provided for connecting the fourth front frame 11 and the third front frame 7, so as to leave installation space for the adjusting mechanism without affecting the overall strength, so that the structure of the device is more reasonable, a shock absorber 4 is arranged between the second front frame 3 and the rear frame 2, a bicycle seat 6 is arranged at the top of the first front frame 1, two symmetrical guide sleeves 9 are fixed at the bottom of the bicycle seat 6, the guide sleeves 9 are slidably connected on both sides of the third front frame 7, the guide sleeves 9 are used for guiding and limiting the bicycle seat 6, an adjusting mechanism for driving the bicycle seat 6 to move forward and backward is arranged in the third front frame 7, a crank 8 for driving the adjusting mechanism is arranged on one side of the third front frame 7, specifically, the user drives the adjusting mechanism by rotating the crank 8, and drives the bicycle seat 6 to move forward and backward through the adjusting mechanism, so as to adjust the forward and backward position of the bicycle seat 6, so that the device can adapt to riders of different heights, and is helpful to increase the comfort of riding;

[0032] The adjusting mechanism comprises a threaded rod 15, a stable seat 13 is threadedly fixed in the inside of one end of the fourth front frame 11 close to the third front frame 7, an installation frame 17 is inserted into the inside of one end of the third front frame 7 close to the fourth front frame 11, the threaded rod 15 is rotatably connected between the stable seat 13 and the installation frame 17, a transmission assembly for driving the threaded rod 15 to rotate is arranged in the inside of the installation frame 17, a threaded sleeve 14 is threadedly connected to the surface of the threaded rod 15, a connecting piece 12 is fixed to the surface of the threaded sleeve 14, and the connecting piece 12 is fixed to the bottom of the bicycle seat 6, specifically, when installing, the stable seat 13 is screwed into the inside of the fourth front frame 11 to increase the stability of the threaded rod 15 in rotation, the threaded rod 15 is driven to rotate to drive the threaded sleeve 14 to move, and the threaded sleeve 14 drives the bicycle seat 6 to move forward and backward through the connecting piece 12;

[0033] A limiting block 19 is fixed to one side of the inside of the third front frame 7, a guide groove 5 is formed in one side of the installation frame 17 and located at a position corresponding to the limiting block 19, and the limiting block 19 is slidably connected in the inside of the guide groove 5, specifically, when installing, the position of the guide groove 5 is aligned with the limiting block 19, and the guide groove 5 and the limiting block 19 can limit the installation frame 17 when the installation frame 17 is inserted into the inside of the third front frame 7, so that the first reserved hole 18 can be accurately aligned with the second reserved hole 20, and the convenience of installation is increased;

[0034] The mounting frame 17 is rotatably connected to the fixed cover 16 near one end of the fourth front frame 11, the fixed cover 16 is fixed on the outside of the third front frame 7 near one end of the fourth front frame 11, and specifically, the fixed cover 16 is screwed on the surface of the third front frame 7 to fix the mounting frame 17, facilitating the installation of the third front frame 7.

[0035] The transmission assembly comprises a transmission rod 10 rotatably connected to the inside of the mounting frame 17, one end of the transmission rod 10 is fixed with the threaded rod 15, the other end of the transmission rod 10 is fixed with a first bevel gear 22, one side of the inside of the end of the mounting frame 17 away from the fourth front frame 11 is fixed with a fixed sleeve 23, one end of the fixed sleeve 23 is rotatably connected with a second bevel gear 24, the inside of the fixed sleeve 23 is rotatably connected with a rotating shaft 25, the rotating shaft 25 is fixed with the second bevel gear 24, and specifically, the second bevel gear 24 is rotated to drive the first bevel gear 22 to rotate, the first bevel gear 22 drives the transmission rod 10 to rotate, and the transmission rod 10 drives the threaded rod 15 to rotate.

[0036] A second reserved hole 20 is formed in the side of the third front frame 7 and located at a position corresponding to the handle 8, a first reserved hole 18 is formed in the side of the mounting frame 17 and located at a position corresponding to the second reserved hole 20, an internal hexagonal hole 27 is formed in the inside of the rotating shaft 25 and located at a position corresponding to the first reserved hole 18, an external hexagonal rocker 21 is fixed to one end of the handle 8, the external hexagonal rocker 21 is inserted into the internal hexagonal hole 27 through the second reserved hole 20 and the first reserved hole 18, and specifically, when the front and rear positions of the bicycle seat 6 are adjusted, the external hexagonal rocker 21 is inserted into the internal hexagonal hole 27 through the second reserved hole 20 and the first reserved hole 18, and the handle 8 is rotated, the external hexagonal rocker 21 is rotated through the handle 8, the external hexagonal rocker 21 drives the rotating shaft 25 to rotate through the internal hexagonal hole 27, the rotating shaft 25 drives the second bevel gear 24 to rotate, and the internal hexagonal hole 27 and the external hexagonal rocker 21 are arranged, so that the handle 8 and the rotating shaft 25 are separated, which is helpful to reduce the risk of scratching the legs during riding and increase the safety of riding.

[0037] The internal hexagonal hole 27 is fixed with a magnet 26, and specifically, the external hexagonal rocker 21 is made of metal iron, and the magnet 26 is used to attract the external hexagonal rocker 21, so as to reduce the risk of accidental falling of the handle 8 and increase the use effect of the device.

[0038] The use process of the bicycle with an adjustable seat provided by the utility model is as follows:

[0039] Technical principles: when adjusting the front and rear positions of the bicycle seat 6, the outer hexagonal rocker 21 is inserted into the inner hexagonal hole 27 through the second reserved hole 20 and the first reserved hole 18, and the handlebar 8 is turned, the outer hexagonal rocker 21 is driven to rotate by the handlebar 8, the outer hexagonal rocker 21 drives the rotating shaft 25 to rotate through the inner hexagonal hole 27, the rotating shaft 25 drives the second bevel gear 24 to rotate, the second bevel gear 24 drives the first bevel gear 22 to rotate, the first bevel gear 22 drives the transmission rod 10 to rotate, the transmission rod 10 drives the threaded rod 15 to rotate, the threaded rod 15 drives the threaded sleeve 14 to move through rotation, the threaded sleeve 14 drives the bicycle seat 6 to move forward and backward through the connecting piece 12, so that the device can adapt to riders of different heights, and the comfort of riding is increased.

[0040] Obviously, the above-described embodiments are only a part of the embodiments of the present application, not all the embodiments, the preferred embodiments of the present application are given in the drawings, but do not limit the patent scope of the present application. The present application can be realized in many different forms, and conversely, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing specific embodiments, or equivalently replace some technical features. Any equivalent structure made by using the content of the present application specification and drawings, directly or indirectly used in other related technical fields, is also within the patent protection scope of the present application.

Claims

1. A seat-adjustable bicycle, characterized by, The utility model provides a front frame (1) and rear frame (2) including first, the rear end of first front frame (1) is fixed with second front frame (3), the front end of first front frame (1) is fixed with third front frame (7), the bottom of second front frame (3) is fixed with fourth front frame (11), the front end of rear frame (2) is rotatably connected with the bottom of first front frame (1), shock absorber (4) is arranged between second front frame (3) and rear frame (2), the top of first front frame (1) is provided with bicycle seat (6), the both sides of the bottom of bicycle seat (6) are fixed with guide sleeve (9) symmetry, guide sleeve (9) is slidably connected in the both sides of third front frame (7), the inside of third front frame (7) is provided with adjusting mechanism for driving bicycle seat (6) to move back and forth, one side of third front frame (7) is provided with rocking handle (8) for driving adjusting mechanism.

2. A seat-adjustable bicycle according to claim 1, characterized in that The adjusting mechanism includes threaded rod (15), the inside of fourth front frame (11) near one end of third front frame (7) is fixed with stabilizing seat (13) by screwing, the inside of third front frame (7) near one end of fourth front frame (11) is inserted with mounting bracket (17), threaded rod (15) is rotatably connected between stabilizing seat (13) and mounting bracket (17), the inside of mounting bracket (17) is provided with transmission assembly for driving threaded rod (15) to rotate, the surface of threaded rod (15) is screwedly connected with threaded sleeve (14), the surface of threaded sleeve (14) is fixed with connecting piece (12), the bottom of connecting piece (12) is fixed with bicycle seat (6).

3. A seat adjustable bicycle according to claim 2, wherein, The inside of third front frame (7) is fixed with limit block (19) on one side, the side of mounting bracket (17) and the position corresponding limit block (19) are provided with guide slot (5), limit block (19) is slidably connected in the inside of guide slot (5).

4. A seat adjustable bicycle according to claim 2, wherein, The end of mounting bracket (17) near fourth front frame (11) is rotatably connected with fixed cover (16), fixed cover (16) is screwedly fixed on the outside of third front frame (7) near one end of fourth front frame (11).

5. A seat adjustable bicycle as claimed in claim 2 wherein, The inside of mounting bracket (17) is rotatably connected with transmission rod (10), one end of transmission rod (10) is fixed with threaded rod (15), the other end of transmission rod (10) is fixed with first bevel gear (22), one side of the inside of the end of mounting bracket (17) away from fourth front frame (11) is fixed with fixed sleeve (23), one end of fixed sleeve (23) is rotatably connected with second bevel gear (24), the inside of fixed sleeve (23) is rotatably connected with rotating shaft (25), rotating shaft (25) is fixed with second bevel gear (24).

6. A seat adjustable bicycle according to claim 5, wherein, One side of the third front frame (7) and at the position corresponding to the handle (8) is provided with a second reserved hole (20), one side of the mounting frame (17) and at the position corresponding to the second reserved hole (20) is provided with a first reserved hole (18), the inside of the rotating shaft (25) and at the position corresponding to the first reserved hole (18) is provided with an internal hexagonal hole (27), one end of the handle (8) is fixedly provided with an external hexagonal rocker (21), the external hexagonal rocker (21) is inserted into the internal hexagonal hole (27) through the second reserved hole (20) and the first reserved hole (18).

7. A seat adjustable bicycle according to claim 6, wherein, The internal hexagonal hole (27) is fixedly provided with a magnet (26).

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