Electric bicycle backrest height adjusting device

Abstract

The utility model relates to an electric bicycle backrest height adjusting device which comprises a backrest and a backrest support, the bottom of the backrest support is detachably fixed to the tail end of a rear seat of an electric bicycle, and the backrest is detachably fixed to the backrest support. The backrest comprises a back cushion, a backrest bottom plate and a backrest rear cover, the backrest support is provided with a plurality of fixing holes in the height direction, the backrest bottom plate is provided with fixing grooves matched with the fixing holes, the fixing holes and the fixing grooves are fixed through bolts, and height adjustment of the backrest on the backrest support is achieved. According to the utility model, convenient and accurate height adjustment can be realized according to user requirements, and the riding comfort is obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric bicycle technical field especially is a kind of adjusting device of electric bicycle backrest height. BACKGROUND

[0002] At present, as the important traffic tool of public daily travel, the comfort design of electric bicycle is increasingly concerned.

[0003] Most electric bicycles on the market adopt fixed backrest design, and the backrest height cannot be adjusted according to the height of user, riding habit and comfort demand. For users of different heights, the fixed-height backrest is difficult to provide adaptive waist and back support, and long-time riding can easily cause fatigue, soreness and other problems, especially in long-distance riding scene, the defect of insufficient comfort is more obvious.

[0004] Although the prior art attempts to improve the backrest design, such as adopting segmented fixed-gear adjustment, but it needs to be manually operated with the aid of tools, the adjustment process is tedious and time-consuming, and the adjustment accuracy is limited, and it is difficult to accurately match user demand. A few electric adjustment schemes also have problems such as high cost and complex structure, which is not conducive to large-scale promotion. At the same time, the existing adjustable backrest has defects in structural strength, stability and durability, and the adjustment mechanism is easy to loosen, which cannot meet the long-term use demand.

[0005] The prior art in the above has the following defects: although there are designs for backrest height adjustment devices on the market at present, there are still certain defects in operation convenience, adjustment accuracy, structural stability and manufacturing cost, which cannot meet the long-term convenient and accurate adjustment of backrest height for users to provide more comfortable riding experience. UTILITY MODEL CONTENTS

[0006] In view of the deficiencies of the prior art, the utility model aims to provide an adjusting device for the height of the backrest of an electric bicycle, which can conveniently and accurately adjust the height according to user demand and significantly improve the comfort of riding.

[0007] The above utility model of the utility model is realized by the following technical scheme:

[0008] An adjusting device for the height of the backrest of an electric bicycle, comprising a backrest and a backrest support, the bottom of the backrest support is detachably fixed to the tail end of the rear seat of the electric bicycle, and the backrest is detachably fixed to the backrest support. The backrest comprises a back cushion, a backrest bottom plate and a backrest rear cover, the backrest support is provided with a plurality of fixing holes in the height direction, the backrest bottom plate is provided with a fixing groove matched with the fixing hole, and the fixing hole and the fixing groove are fixed by bolts to realize the height adjustment of the backrest on the backrest support.

[0009] By the technical scheme, the height of the backrest is adjustable, the individualized demand of the height of the backrest of users with different heights is met, and the comfort of riding is improved.

[0010] As a further technical scheme of the utility model: the top end of backrest support is provided with at least three fixing holes in vertical direction, three fixing holes are arranged at equal intervals, and the center distance of adjacent fixing holes is in the range of 10mm-20mm.

[0011] By the technical scheme, the multiple fixing holes with equal intervals provide multiple height adjustment functions, the structural stability can be ensured, and the adjustment demand of accurate height is met.

[0012] As a further technical scheme of the utility model: the inner wall of fixing hole is provided with anti-skid texture.

[0013] By the technical scheme, the anti-skid texture of the inner wall of fixing hole enhances the anti-loosening performance of bolt connection, and ensures the connection reliability under vibration working condition in the riding process.

[0014] As a further technical scheme of the utility model: one side of backrest bottom plate is integrally formed and fixedly connected with fixing boss, and the fixing groove is arranged on the fixing boss.

[0015] By the technical scheme, the fixing boss structure integrally formed strengthens the bearing capacity of the connection part, effectively disperses stress concentration, enhances the structural strength of the fixing groove, and makes the connection of the backrest and the backrest support more stable.

[0016] As a further technical scheme of the utility model: one side of backrest bottom plate is integrally formed and fixedly connected with two fixing columns, two fixing columns are arranged on the two sides of the width direction of backrest bottom plate, the two sides of backrest support are integrally formed and fixedly connected with wing plates respectively, the waist-shaped holes are arranged on the wing plates, the positions of two waist-shaped holes and two fixing columns are matched, and one end of the bolt is threadedly connected on the fixing column after penetrating through the waist-shaped hole.

[0017] By the technical scheme, the cooperation of the fixing column and the waist-shaped hole ensures the height adjustment function of the backrest, further enhances the stability and reliability of the connection of the backrest and the backrest support, prevents the backrest from shaking or shifting in the use process, provides a certain flexibility for the installation and adjustment of the bolt, and is convenient for installation and disassembly.

[0018] As a further technical scheme of the utility model: the backrest support is made of metal material.

[0019] By the technical scheme, the metal material support provides excellent mechanical properties while ensuring lightweight, and significantly improves the bending and torsion resistance of the device.

[0020] As a further technical scheme of the utility model: one side of the backrest bottom plate is provided with a positioning boss, positioning grooves are formed in the positioning boss, and one side of the backrest rear cover is fixed with a plurality of positioning blocks matched with the positioning grooves.

[0021] Through the above technical scheme, the cooperation of the positioning blocks and the positioning grooves realizes the precise assembly of the backrest rear cover, and improves the connection tightness between the backrest rear cover and the backrest bottom plate and the overall structural consistency.

[0022] As a further technical scheme of the utility model: the tail end of the electric bicycle rear seat is provided with a seat framework, and the backrest support is detachably connected with the seat framework.

[0023] Through the above technical scheme, the detachable connection structure takes into account the convenience of installation and the bearing performance, and is convenient for later maintenance or component replacement.

[0024] In summary, the utility model has at least one of the following beneficial technical effects:

[0025] 1. The utility model discloses a height adjusting device of an electric bicycle backrest, which is designed in cooperation with equidistant fixing holes and fixing grooves, and each component is designed to be detachably connected, so that users can select different gears to adjust the precise height according to the height or riding posture requirements, and realize multi-stage precise height adjustment and quick disassembly and assembly of the backrest.

[0026] 2. The utility model discloses a height adjusting device of an electric bicycle backrest, which is designed in cooperation with the positioning boss of the backrest bottom plate and the positioning block of the backrest rear cover through the anti-skid texture design of the inner wall of the fixing hole, the metal material support, so that the stability of the electric bicycle backrest structure is enhanced.

[0027] 3. The utility model discloses a height adjusting device of an electric bicycle backrest, which is designed in cooperation with the positioning boss of the backrest bottom plate and the positioning block of the backrest rear cover through the anti-skid texture design of the inner wall of the fixing hole, the metal material support, so that the stability of the electric bicycle backrest structure is enhanced. DRAWINGS

[0028] Figure 1 It is an overall three-dimensional structure schematic view of the embodiment one.

[0029] Figure 2 It is an explosion schematic view of the embodiment one.

[0030] Figure 3 It is a three-dimensional structure schematic view of the higher height gear of the backrest of the embodiment one.

[0031] Figure 4 It is a three-dimensional structure schematic view of the middle height gear of the backrest of the embodiment one.

[0032] Figure 5 This is a three-dimensional structural diagram of the lower backrest height setting in Example 1.

[0033] Reference numerals: 1. Backrest; 11. Cushion; 12. Backrest base plate; 121. Fixing boss; 1211. Fixing groove; 122. Fixing post; 123. Positioning boss; 1231. Positioning groove; 13. Backrest cover; 131. Positioning block; 2. Backrest bracket; 21. Fixing hole; 22. Wing plate; 221. Waist-shaped hole; 3. Bolt; 4. Seat frame. Detailed Implementation

[0034] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] Example 1:

[0038] Reference Figure 1 and Figure 2The utility model discloses an electric bicycle backrest height's adjusting device, including backrest 1 and backrest support 2, wherein the bottom of backrest support 2 is fixed in the tail end of electric bicycle rear seat in detachable mode, and backrest 1 is also detachably fixed on backrest support 2.

[0039] Reference Figure 2 Three fixed holes 21 are formed in the top end of backrest support 2 along the height direction, the three fixed holes 21 are arranged at equal intervals, the center distance of adjacent fixed holes 21 is within the range of 10mm-20mm, and a fixed groove 1211 adapted to the fixed hole 21 is arranged on the backrest bottom plate 12. The fixed hole 21 and the fixed groove 1211 are fixed by the bolt 3, so as to realize the height adjustment of the backrest 1 on the backrest support 2.

[0040] In addition, the number of fixed holes 21 can be increased, such as setting 5-7 fixed holes 21, to provide more adjustment gears. According to the user's demand, the center distance of adjacent holes can also be adjusted, for example, for children's electric bicycles, the distance can be appropriately reduced to improve the adjustment accuracy.

[0041] To enhance the stability of connection, the inner wall of the fixed hole 21 is provided with anti-skid texture. The anti-skid texture increases the friction between the fixed hole 21 and the bolt 3, prevents the bolt 3 from loosening during use, and improves the stability and reliability of the connection between the backrest 1 and the backrest support 2.

[0042] Reference Figure 2 One side of the backrest bottom plate 12 is integrally connected with a fixed boss 121, and the fixed groove 1211 is formed on the fixed boss 121.

[0043] Reference Figure 2 One side of the backrest bottom plate 12 is also integrally connected with two fixed columns 122, and the two fixed columns 122 are distributed on both sides of the width direction of the backrest bottom plate 12. The backrest support 2 is integrally connected with a wing plate 22 on both sides, and a waist-shaped hole 221 is formed on the two wing plates 22. The positions of the two waist-shaped holes 221 and the two fixed columns 122 are matched with each other, and one end of the bolt 3 is screwed with the fixed column 122 after passing through the waist-shaped hole 221.

[0044] Further, an anti-skid coating can be provided on the inner wall of the waist-shaped hole 221 to increase the friction between the bolt 3 and the waist-shaped hole 221, and the length and width of the waist-shaped hole 221 can also be adjusted to adapt to different height adjustment ranges and installation requirements.

[0045] The backrest support 2 is made of metal material, which has high strength and rigidity, can bear the weight of the backrest and the passenger, and ensures the stability and reliability of the backrest support 2. Meanwhile, the metal material has good corrosion resistance and wear resistance, prolonging the service life of the backrest support 2.

[0046] With reference to Figure 2 One side of the backrest bottom plate 12 is provided with four positioning bosses 123, and positioning grooves 1231 are formed in the positioning bosses 123. One side of the backrest rear cover 13 is fixed with several positioning blocks 131 matched with the positioning grooves 1231.

[0047] The cooperation of the positioning grooves 1231 and the positioning blocks 131 ensures the relative position accuracy between the backrest rear cover 13 and the backrest bottom plate 12, and makes the overall structure of the backrest 1 more stable. Rubber pads or other buffer materials can be arranged on the surfaces of the positioning grooves 1231 and the positioning blocks 131 to reduce wear and noise during installation.

[0048] Further, the number of the positioning bosses 123 and the positioning blocks 131 can be increased, such as to five or six, so as to improve the positioning accuracy and stability.

[0049] With reference to Figure 1 The tail end of the electric bicycle rear seat is provided with a seat frame 4, and the backrest support 2 is detachably connected with the seat frame 4.

[0050] The assembly process of the electric bicycle backrest height adjustable device includes the following steps:

[0051] First, the backrest support 2 is preliminarily connected with the backrest bottom plate 12. The fixing boss 121 of the backrest bottom plate 12 is aligned with one of the fixing holes 21 of the backrest support 2, the bolt 3 is passed through the fixing hole 21 and the fixing groove 1211, and the bolt 3 is preliminarily tightened. At this time, the backrest bottom plate 12 and the backrest support 2 form a connectable state. At the same time, the fixing columns 122 on both sides of the backrest bottom plate 12 are aligned with the waist-shaped holes 221 of the two side wings 22 of the backrest support 2, the bolt 3 is inserted and preliminarily fixed, and the connection between the backrest bottom plate 12 and the backrest support 2 is ensured to be stable but still adjustable.

[0052] Then, the backrest 1 is assembled as a whole. The back cushion 11 is fixedly connected with the backrest bottom plate 12. Only the four positioning blocks 131 of the backrest rear cover 13 are aligned with the four positioning grooves 1231 of the positioning bosses 123 of the backrest bottom plate 12, and the backrest rear cover 13 is pressed, so that the four positioning blocks 131 are completely embedded in the corresponding positioning grooves 1231, and the assembly of the back cushion 11, the bottom plate 12 and the rear cover 13 is completed.

[0053] Finally, the backrest support 2 is connected with the seat frame 4, the bottom of the backrest support 2 is detachably connected with the seat frame 4 at the tail end of the rear seat of the electric bicycle through the bolt 3, and the whole device is stably installed.

[0054] The setting steps of the three gears of the backrest height adjustment of the electric bicycle backrest height adjustable device are as follows:

[0055] Referring to Figure 5 and Figure 2 , the first gear is a lower height gear, the bolt 3 between the fixed hole 21 and the fixed groove 1211 and the bolt 3 between the waist-shaped hole 221 and the fixed column 122 are completely loosened, the backrest 1 is moved downward, the fixed boss 121 of the backrest bottom plate 12 is aligned with the fixed hole 21 at the lower position of the backrest support 2, the bolt 3 is inserted through the fixed hole 21 and the fixed groove 1211, and the bolt 3 is tightened by using a wrench. At the same time, the position of the waist-shaped hole 221 and the fixed column 122 is adjusted, the bolt 3 is inserted and tightened, and the backrest 1 is firmly fixed at the lower height gear.

[0056] Referring to Figure 4 and Figure 2 , the second gear is an intermediate height gear, all the connecting bolts 3 are loosened, the backrest 1 is moved upward, the fixed boss 121 of the backrest bottom plate 12 is aligned with the fixed hole 21 at the middle position of the backrest support 2, the bolts 3 between the fixed hole 21 and the fixed groove 1211 and the bolts 3 between the waist-shaped hole 221 and the fixed column 122 are sequentially installed and tightened, the backrest 1 is stably adjusted at the intermediate height, and the adjustment of the intermediate height gear is completed.

[0057] Referring to Figure 3 and Figure 2 , the third gear is a higher height gear, the bolt 3 is loosened, the backrest 1 is continuously moved upward, the fixed groove 1211 of the fixed boss 121 is aligned with the fixed hole 21 at the higher position of the backrest support 2, the bolts 3 between the fixed hole 21 and the fixed groove 1211 and the bolts 3 between the waist-shaped hole 221 and the fixed column 122 are sequentially installed and tightened, the backrest 1 is ensured to be not shaken, the adjustment of the higher height gear is completed.

[0058] The steps of maintenance and replacement of the electric bicycle backrest height adjustable device are as follows:

[0059] The replacement steps of the backrest 1, the back cushion 11, the bottom plate 12 or the rear cover 13 are as follows: after the relevant bolts 3 are loosened, the positioning block 131 and the positioning groove 1231 are separated, the corresponding components can be detached and replaced.

[0060] The replacement steps of the backrest support 2 are as follows: the connection between the backrest support 2 and the seat frame 4 is disconnected, all the bolts 3 connected with the backrest bottom plate 12 are loosened, the old backrest support 2 is removed and the new backrest support 2 is installed, and the re-fixing is performed according to the assembly process.

[0061] The embodiments of the present embodiment are the preferred embodiments of the present utility model, not limited to the protection scope of the present utility model, so: all equivalent changes made according to the structure, shape and principle of the present utility model should be covered in the protection scope of the present utility model.

Claims

1. An electric bicycle backrest height adjusting device, comprising a backrest (1) and a backrest support (2), the bottom of the backrest support (2) is detachably fixed at the tail end of the electric bicycle rear seat, characterized in that, The backrest (1) is detachably fixed on the backrest support (2); The backrest (1) comprises a back cushion (11), a backrest bottom plate (12) and a backrest rear cover (13), the backrest support (2) is provided with a plurality of fixing holes (21) in the height direction, the backrest bottom plate (12) is provided with a fixing groove (1211) matched with the fixing hole (21), and the fixing hole (21) and the fixing groove (1211) are fixed by a bolt (3), so that the height of the backrest (1) on the backrest support (2) is adjusted.

2. The electric bicycle backrest height adjustment device according to claim 1, characterized in that, The top end of the backrest support (2) is provided with at least three fixing holes (21) in the vertical direction, and the three fixing holes (21) are arranged at equal intervals, and the center distance between adjacent fixing holes (21) is in the range of 10mm-20mm.

3. The electric bicycle backrest height adjustment device according to claim 1, characterized in that, The inner wall of the fixing hole (21) is provided with anti-skid texture.

4. The electric bicycle backrest height adjustment device according to claim 1, characterized in that, One side of the backrest bottom plate (12) is integrally formed and fixedly connected with a fixing boss (121), and the fixing groove (1211) is formed on the fixing boss (121).

5. The electric bicycle backrest height adjustment device according to claim 1, characterized in that, One side of the backrest bottom plate (12) is integrally formed and fixedly connected with two fixing columns (122), and the two fixing columns (122) are distributed on the two sides of the backrest bottom plate (12) in the width direction, the two sides of the backrest support (2) are integrally formed and fixedly connected with wing plates (22), the wing plates (22) are provided with waist-shaped holes (221), the two waist-shaped holes (221) are matched with the positions of the two fixing columns (122), and one end of the bolt (3) is threadedly connected with the fixing column (122) after penetrating through the waist-shaped hole (221).

6. The electric bicycle backrest height adjustment device according to claim 1, wherein, The backrest support (2) is made of metal.

7. The electric bicycle backrest height adjustment device according to claim 1, wherein, One side of the backrest bottom plate (12) is provided with a positioning boss (123), the positioning boss (123) is provided with a positioning groove (1231), and one side of the backrest rear cover (13) is fixed with a plurality of positioning blocks (131) matched with the positioning groove (1231).

8. The electric bicycle backrest height adjustment device according to claim 1, wherein, The tail end of the electric bicycle rear seat is provided with a seat frame (4), and the backrest support (2) is detachably connected with the seat frame (4).

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