Telescopic folding backrest tail box of electric bicycle

Abstract

The utility model provides an electric bicycle telescopic folding backrest tail box which comprises a backrest and a tail box body which are arranged front and back, a telescopic folding mechanism is arranged between the backrest and the tail box body, and the backrest can move front and back relative to the tail box body. The trunk body is provided with a sliding limiting device for sliding limiting of the telescopic folding mechanism. The supporting position of the backrest can be flexibly adjusted according to a driver, so that the back of a single-person electric bicycle driver is effectively supported. According to the telescopic backrest tail box of the electric bicycle, the back of a rider can lean against the telescopic backrest tail box when the rider rides the electric bicycle by a single person, and the comfort of riding the electric bicycle by the single person is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric bicycles, in particular to a telescopic folding backrest tail box of an electric bicycle. Background Art

[0002] By the end of 2022, the number of electric bicycles in my country has reached 350 million, accounting for more than 95% of the global total. Electric bicycles have become one of the main means of transportation for residents, which is in line with the theme of the green era. To meet travel needs, electric bicycle seats are usually available for two people in the front and back. The back of the rear passenger can lean on the backrest installed at the rear of the seat, or the trunk installed on the rear rack. When riding an electric bicycle alone, the driver still cannot use the backrest and trunk at the rear to improve riding comfort.

[0003] Based on the above problems, it is necessary to design an electric bicycle retractable backrest trunk that can provide support for the driver's back when riding alone. This structure can retain the storage function of the trunk without affecting the demand for double riding. Utility Model Content

[0004] The utility model provides a telescopic and foldable backrest tail box for an electric bicycle, which can provide support for the back of the driver when riding alone, thereby improving the comfort of the electric bicycle driven by a single person.

[0005] In order to achieve the above technical objectives and the above technical effects, the utility model solves the above problems through the following technical solutions:

[0006] The invention discloses a telescopic folding backrest trunk of an electric bicycle, comprising a backrest and a trunk body arranged front and back, a telescopic folding mechanism being arranged between the backrest and the trunk body, and the backrest being movable front and back relative to the trunk body; and a sliding limit device being arranged on the trunk body to slide and limit the telescopic folding mechanism.

[0007] Furthermore, the telescopic folding mechanism is a horizontal telescopic mechanism, a horizontal folding telescopic mechanism or a folding telescopic mechanism, and the horizontal telescopic mechanism, the horizontal folding telescopic mechanism and the folding telescopic mechanism correspond to the first sliding limit device, the second sliding limit device and the third sliding limit device respectively to slide and limit the horizontal telescopic mechanism, the horizontal folding telescopic mechanism and the folding telescopic mechanism.

[0008] Furthermore, the horizontal telescopic mechanism is two left and right sliding support rods arranged on the back of the backrest, and the trunk body is provided with horizontal slide rails that slide in cooperation with the sliding support rods.

[0009] Furthermore, the sliding support rod is provided with a plurality of positioning holes at intervals along the length direction, the sliding limiting device adopts a spring locking pin, the trunk body is built with a spring locking pin which cooperates with the positioning holes on both sides respectively, and the spring locking pins on both sides are unlocked by the unlocking mechanism.

[0010] Furthermore, an extended backrest is hinged on the top of the backrest through a flap hinge, and the extended backrest can be flipped down and stored on the back side of the backrest, and the width of the extended backrest is smaller than the spacing between the sliding support rods on both sides. When the extended backrest is unfolded, the height of the backrest can be increased, thereby improving the riding comfort.

[0011] Furthermore, the backrest and the extended backrest are provided with a buffer layer and a filling layer in sequence from the outside to the inside, the buffer layer is a serpentine spring or a rubber bandage, and the filling layer is filled with polyurethane foam or a shaped sponge.

[0012] Furthermore, the spring lock pin includes a pin body and a compression spring; the unlocking mechanism includes a connecting rope connecting the pin bodies on both sides, a longitudinal pressure rod whose bottom end is connected or abutted with the connecting rope, the longitudinal pressure rod is reset upward by a reset spring, and the top of the longitudinal pressure rod is fixedly connected to an unlocking button installed on the top of the trunk body; the length of the connecting rope matches the spacing between the pin bodies on both sides when the spring lock pin is locked.

[0013] Furthermore, the spring lock pin includes a pin body and a compression spring, and the pin head of the pin body is arranged at an oblique angle to facilitate the forward stretching of the backrest.

[0014] Furthermore, the horizontal folding and telescopic mechanism is two left and right scissor-type telescopic rods arranged on the back of the backrest, and the second sliding limit device uses two straight telescopic lifting rods vertically fixed in the trunk body, and the ends of the scissor-type telescopic rods extend into the trunk body and are connected with the straight telescopic lifting rods.

[0015] Furthermore, the two ends of the scissors-type telescopic rod are provided with two support rods, one of the support rods at the connection between the scissors-type telescopic rod and the back of the backrest is fixedly connected to the back of the backrest, and the other support rod is movably connected to the back of the backrest; one of the support rods at the connection between the scissors-type telescopic rod and the trunk body is fixedly connected to a fixed column in the trunk body, and the other support rod is connected to a sliding positioning shaft of a straight-line telescopic lifting rod arranged on the fixed column; when the backrest is stretched or contracted, the support rod of the movable scissors-type telescopic rod at the back of the backrest and the support rod of the scissors-type telescopic rod on the sliding positioning shaft of the straight-line telescopic lifting rod on the same side are maintained on the same horizontal line.

[0016] Furthermore, the second sliding limit device adopts two straight telescopic lifting rods, and the maximum length of the straight telescopic lifting rods is adapted to the maximum height of the trunk body.

[0017] Furthermore, the folding and telescopic mechanism includes a first connecting plate and a second connecting plate connected in the middle by a straight telescopic lifting rod, and the outward ends of the first connecting plate and the second connecting plate are respectively provided with a first connecting block and a second connecting block hinged by two 90-degree self-locking folding hinges. When the two 90-degree self-locking folding hinges are locked, the first connecting block and the second connecting block are respectively located on two side surfaces of the first connecting plate and the second connecting plate, the first connecting block is connected to the back of the backrest, and the second connecting block is connected to the trunk body. The third sliding limit device uses the self-positioning unlocking of the straight telescopic lifting rod to limit.

[0018] The advantages and effects of the utility model are:

[0019] 1. In the utility model, the backrest cooperates with the horizontal slide rail of the trunk body through the back sliding support rod, and the backrest can slide forward and backward relative to the trunk body. By adjusting the spring lock pin into a suitable positioning hole, the distance between the backrest and the trunk body can be locked, so as to adjust the backrest support position.

[0020] The backrest support position of this solution can be flexibly adjusted according to the driver, so that the back of a single-person electric bicycle rider can be effectively supported, providing a safer and more comfortable driving experience, making the driver less tired and driving safer.

[0021] 2. The telescopic positioning mechanism of this scheme adopts a spring lock pin. When using it, you only need to pull the backrest outward to make the positioning hole come out along the bevel of the pin head. When storing the backrest, you only need to press the unlocking button on the top of the unlocking mechanism, or the telescopic positioning mechanism adopts a straight telescopic lifting rod to push the backrest back smoothly. No auxiliary tools are required, and it is easy to operate and use.

[0022] 3. This solution is reasonably designed. The left and right sets of sliding matching structures only use the space on the side of the trunk, which does not affect the storage function of the trunk. It has a simple structure, low cost, easy use, beautiful and practical appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the backrest in the unfolded state of Example 1;

[0024] Figure 2 This is a schematic diagram of the structure of the backrest in the stowed state according to embodiment 1;

[0025] Figure 3 This is a schematic diagram of the working of the spring lock pin and the unlocking mechanism in Example 1;

[0026] Figure 4 This is a schematic diagram of the spring lock pin structure in Example 1.

[0027] Figure 5 This is a schematic diagram of the structure of the backrest in the unfolded state of Example 2;

[0028] Figure 6 This is a schematic diagram of the structure of the backrest in the stowed state of Example 2;

[0029] Figure 7 It is a schematic diagram of the connection between the scissor-type telescopic rod, the straight telescopic lifting rod and the backrest in Example 2;

[0030] Figure 8 This is a schematic diagram of the structure of the backrest in the unfolded state of Example 3;

[0031] Fig. 9 This is a schematic diagram of the structure of the backrest in the stowed state of Example 3.

[0032] Figure number identification: 1. Tail box body, 11. Horizontal slide rail, 2. Backrest, 3. Sliding support rod, 31. Positioning hole, 4. Spring lock pin, 41. Pin body, 411. Limit block, 42. Compression spring, 5. Unlocking mechanism, 51. Connecting rope, 52. Longitudinal pressure rod, 53. Reset spring, 54. Unlocking button, 6. Extended backrest, 7. Scissors-type telescopic rod, 8. One-shaped telescopic lifting rod, 9. First connecting plate, 91. Second connecting plate, 92. 90-degree self-locking folding hinge, 93. First connecting block, 94. Second connecting block. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with embodiments, but the present invention is not limited to these embodiments. Example 1

[0034] The telescopic backrest trunk of the electric bicycle described in this embodiment is as shown in the attached Figure 1 , 2 As shown, the main body includes a trunk body 1, a backrest 2, a sliding support rod 3, a spring lock pin 4 and an unlocking mechanism 5. The backrest 2 is arranged at the front end of the trunk body 1, and two left and right sliding support rods 3 are arranged on the back of the backrest 2. The trunk body 1 has two left and right horizontal slide rails 11 built in the trunk body 1 that slide with the sliding support rods 3. The backrest 2 can move forward and backward relative to the trunk body 1 through the sliding cooperation between the sliding support rods 3 and the horizontal slide rails 11. The two left and right sliding support rods 3 are arranged to improve the supporting stability of the backrest 2. The sliding cooperation structure on both sides only uses the space on the side of the trunk body 1, and does not affect its storage function.

[0035] As attached Figure 1 , 3 As shown, the sliding support rod 3 is provided with a plurality of positioning holes 31 at intervals along the length direction, and the trunk body 1 has two built-in spring lock pins 4 that respectively cooperate with the positioning holes 31 on both sides for positioning. By cooperating between the spring lock pins 4 and the positioning holes 31, the distance between the backrest 2 and the trunk body 1 can be adjusted. The spring lock pins 4 on both sides are arranged symmetrically and are unlocked by the unlocking mechanism 5.

[0036] The spring lock pin 4 is installed in the lock pin installation hole provided in the side wall of the trunk body 1. The spring lock pin 4 includes a pin body 41, a compression spring 42 and a limit end cover 43. The compression spring 42 is sleeved on the pin body 41. The front end of the compression spring 42 abuts against a limit block 411 (located behind the pin head) provided in the side wall of the pin body 41, and the rear end acts on the limit end cover 43. In the embodiment, the pin head is provided with an oblique angle for facilitating the forward extension of the backrest 3, and the inner wall of the lock pin installation hole is provided with a guide groove matched with the outer end of the limit block 411, and the pin body 41 is limited to rotate through the guide groove.

[0037] The unlocking mechanism 5 is installed in the trunk body 1, and includes a connecting rope 51, a longitudinal pressure rod 52, a reset spring 53 and an unlocking button 54. The two ends of the connecting rope 51 are respectively connected to the pin bodies 41 on both sides. The length of the connecting rope 51 matches the spacing between the pin bodies 41 on both sides when the spring lock pin 4 is locked. In the non-unlocking state, the connecting rope 51 does not provide tension to the pin bodies 41 on both sides. The bottom end of the longitudinal pressure rod 52 is connected to the middle of the connecting rope 51, and the top end is fixedly connected to the unlocking button 54 installed on the top of the trunk body 1. The reset spring 53 is sleeved on the longitudinal pressure rod 52, and its two ends act on the unlocking button 54 and the trunk body 1 respectively, so that the longitudinal pressure rod 52 can be reset upward.

[0038] As attached Figure 1 , 2 As shown, the top of the backrest 2 is hinged with an extended backrest 6 through a flap hinge, and the extended backrest 6 can be flipped down and stored on the back side of the backrest 2, and the width of the extended backrest 6 is smaller than the spacing between the sliding support rods 3 on both sides. The backrest 2 and the extended backrest 6 are provided with a buffer layer and a filling layer from the outside to the inside, the buffer layer is a serpentine spring or a rubber bandage, and the filling layer is filled with polyurethane foam or a shaped sponge.

[0039] When using the telescopic backrest trunk of the electric bicycle described in this embodiment, you only need to pull the backrest 2 outward to a suitable position, and then flip up and extend the backrest 6 to increase the backrest height, which can meet the riding needs and improve the comfort of single-person driving. Figure 3 As shown by the arrow, when the backrest is stored, the unlocking button 54 on the top of the unlocking mechanism is pressed, and the longitudinal pressure rod 52 presses down the connecting rope 51, so that the pin bodies 41 on both sides slide inward to unlock, and the backrest 2 can be pushed back smoothly to complete the storage of the device. The operation is simple. Example 2

[0040] The telescopic folding backrest trunk of the electric bicycle described in this embodiment is as shown in the attached Figure 5 , 6As shown in Figures 1 and 7, the main body includes a trunk body 1, a backrest 2, a scissor-type telescopic rod 7, and a straight telescopic lifting rod 8. The backrest 2 is arranged at the front end of the trunk body 1, and two left and right scissor-type telescopic rods 7 are arranged on the back of the backrest 2. Two left and right straight telescopic lifting rods 8 that slide with the scissor-type telescopic rods 7 are vertically arranged in the trunk body 1. The backrest 2 can move forward and backward relative to the trunk body 1 through the sliding cooperation between the scissor-type telescopic rods 7 and the straight telescopic lifting rod 8. The two left and right scissor-type telescopic rods 7 can improve the supporting stability of the backrest 2. The sliding cooperation structure on both sides only uses the space on the side of the trunk body 1, and does not affect its storage function.

[0041] As attached Figure 5 , 6 As shown in Figures 7 and 8, an opening is provided on the trunk body 1 for the extension and retraction of the scissor-type telescopic rods 7. The ends of the scissor-type telescopic rods 7 extend into the trunk body 1. The ends of each scissor-type telescopic rod 7 are connected to a straight-line telescopic lifting rod 8 at a vertical position on the same side. By stretching the scissor-type telescopic rod 7 to drive the straight-line telescopic lifting rod 8 to be positioned and unlocked, the distance between the backrest 2 and the trunk body 1 can be adjusted.

[0042] As attached Figure 7 As shown, there are two support rods at both ends of the scissors-type telescopic rod 7, one of the support rods at the connection between the scissors-type telescopic rod 7 and the back of the backrest 2 is fixedly connected to the back of the backrest 2, and the other support rod is movably connected to the back of the backrest 2, one of the support rods at the connection between the scissors-type telescopic rod 7 and the trunk main body 1 is fixedly connected to the fixed column in the trunk main body 1, and the other support rod is connected to the sliding positioning shaft of the straight-line telescopic lifting rod 8 arranged on the fixed column. When the backrest 2 is stretched or contracted, the support rod of the movable scissors-type telescopic rod 7 on the back of the backrest 2 and the support rod of the scissors-type telescopic rod 7 on the sliding positioning shaft of the straight-line telescopic lifting rod 8 on the same side are always maintained on the same horizontal line, ensuring smooth stretching and contraction of the backrest.

[0043] As attached Figure 5 , 6 As shown, the top of the backrest 2 is hinged with an extended backrest 6 through a flap hinge, and the extended backrest 6 can be flipped down and stored on the back side of the backrest 2. The width of the extended backrest 6 is smaller than the spacing between the scissor-type telescopic rods 7 on both sides. The backrest 2 and the extended backrest 6 are provided with a buffer layer and a filling layer from the outside to the inside, the buffer layer is a serpentine spring or a rubber bandage, and the filling layer is filled with polyurethane foam or a shaped sponge.

[0044] When using the telescopic backrest trunk of an electric bicycle described in this embodiment, the backrest 2 only needs to be pulled outward to a suitable position, and the backrest 6 is turned up to increase the backrest height, which can meet riding needs and improve the comfort of single-person driving. When the backrest is stored, the scissor-type telescopic rod 7 is stretched to drive the straight telescopic lifting rod 8 to the maximum length and slide and unlock, and the backrest 2 can be smoothly pushed back to complete the storage of the device, which is simple to operate. Example 3

[0045] The telescopic folding backrest trunk of the electric bicycle described in this embodiment is as shown in the attached Figure 8 , 9 As shown, the main body includes a trunk body 1, a backrest 2, a straight telescopic lifting rod 8, a first connecting plate 9, a second connecting plate 91, a 90-degree self-locking folding hinge 92, a first connecting block 93, and a second connecting block 94.

[0046] The backrest 2 is arranged at the front end of the trunk body 1, the back of the backrest 2 is provided with a first connecting block 93, the trunk body 1 is provided with a second connecting block 94, the first connecting block 93 and the second connecting block 94 are respectively connected to the ends of the first connecting plate 9 and the second connecting plate 91 through a 90-degree self-locking folding hinge 92, and a straight telescopic lifting rod 8 is arranged between the ends of the first connecting plate 9 and the second connecting plate 91 that are not connected to the first connecting block 93 and the second connecting block 94, and the backrest 2 can move forward and backward relative to the trunk body 1 by sliding the straight telescopic lifting rod 9. The first connecting plate 9, the 90-degree self-locking folding hinge 92, and the first connecting block 93 are arranged to improve the support stability of the backrest 2. The second connecting plate 91, the 90-degree self-locking folding hinge 92, and the second connecting block 94 are arranged on the outer wall of the trunk body 1 without affecting its storage function.

[0047] As attached Figure 8 As shown, by pulling the straight telescopic lifting rod 9 to unlock and position, the distance between the backrest 2 and the trunk body 1 can be adjusted.

[0048] As attached Figure 8 , 9 As shown, the top of the backrest 2 is hinged with an extended backrest 6 through a flap hinge, and the extended backrest 6 can be flipped down and stored on the back side of the backrest 2. The backrest 2 and the extended backrest 6 are provided with a buffer layer and a filling layer from the outside to the inside, the buffer layer is a serpentine spring or a rubber bandage, and the filling layer is filled with polyurethane foam or a shaped sponge.

[0049] When using the telescopic backrest trunk of an electric bicycle described in this embodiment, it is only necessary to open the 90-degree self-locking folding hinge 92 to make the backrest 2 face the back of the human body, then pull the backrest 2 outward to a suitable position, and flip up and extend the backrest 6 to increase the backrest height, which can meet riding needs and improve the comfort of single-person driving. When storing the backrest, stretch the straight telescopic lifting rod 9 to the maximum length and slide it to unlock, so that the backrest 2 can be pushed back smoothly, and then the 90-degree self-locking folding hinge 92 can be locked to complete the storage of the device, which is simple to operate.

[0050] In the present embodiment 3, a plurality of straight telescopic lifting rods 8 are arranged between the ends of the first connecting plate 9 and the second connecting plate 91 that are not connected to the first connecting block 93 and the second connecting block 94 , and can be arranged side by side according to actual needs.

[0051] In the third embodiment, the second connecting block 94 can be removed, and the 90-degree self-locking folding hinge 92 can be directly connected to the trunk body 1 .

[0052] The trunk body in the above embodiments has been reinforced.

[0053] The above descriptions are only embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations, telescoping, stretching, and straight pulling made using the contents of the present invention specification and drawings to implement this technology or directly or indirectly apply it to other related technical fields are also included in the patent protection scope of the present invention.

[0054] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. Various changes, modifications, substitutions and variations of these embodiments without departing from the principle and spirit of the present invention still fall within the scope of protection of the present invention.

Claims

1. A telescopic and foldable backrest trunk for an electric bicycle, characterized in that: The trunk comprises a backrest (2) and a trunk body (1) arranged front and rear, wherein a telescopic folding mechanism is provided between the backrest (2) and the trunk body (1), and the backrest (2) can move forward and backward relative to the trunk body (1); and the trunk body (1) is provided with a sliding limit device to slide and limit the telescopic folding mechanism.

2. The telescopic foldable backrest trunk of an electric bicycle according to claim 1, characterized in that: The telescopic and folding mechanism is one of a horizontal telescopic mechanism, a horizontal folding telescopic mechanism or a folding telescopic mechanism. The horizontal telescopic mechanism, the horizontal folding telescopic mechanism and the folding telescopic mechanism correspond to the first sliding limit device, the second sliding limit device and the third sliding limit device respectively to slide and limit the horizontal telescopic mechanism, the horizontal folding telescopic mechanism and the folding telescopic mechanism.

3. The telescopic foldable backrest trunk of an electric bicycle according to claim 2, characterized in that: The horizontal telescopic mechanism is two left and right sliding support rods (3) arranged on the back of the backrest (2), and the trunk body (1) is provided with a horizontal slide rail (11) that is slidably matched with the sliding support rods (3).

4. The telescopic foldable backrest trunk of an electric bicycle according to claim 3, characterized in that: The sliding support rod (3) is provided with a plurality of positioning holes (31) at intervals along the length direction; the first sliding limit device adopts a spring lock pin (4); the trunk body (1) is internally provided with spring lock pins (4) respectively cooperating with the positioning holes (31) on both sides for positioning; the spring lock pins (4) on both sides are unlocked in conjunction with each other through an unlocking mechanism (5).

5. The telescopic foldable backrest trunk of an electric bicycle according to claim 1, characterized in that: The top of the backrest (2) is hingedly connected with an extended backrest (6) via a flap hinge, and the extended backrest (6) can be stored on the back side of the backrest (2) when flipped downward, and the width of the extended backrest (6) is smaller than the spacing between the sliding support rods (3) on both sides or the scissor-type telescopic rods on both sides.

6. The telescopic foldable backrest trunk of an electric bicycle according to claim 5, characterized in that: The backrest (2) and the extended backrest (6) are provided with a buffer layer and a filling layer in sequence from the outside to the inside, the buffer layer is a serpentine spring or a rubber bandage, and the filling layer is filled with polyurethane foam or a shaped sponge.

7. The telescopic foldable backrest trunk of an electric bicycle according to claim 4, characterized in that: The spring lock pin (4) comprises a pin body (41) and a compression spring (42); The unlocking mechanism (5) comprises a connecting rope (51) connecting the pin bodies (41) at both sides, a longitudinal pressure rod (52) whose bottom end is connected to or abuts against the connecting rope (51), the longitudinal pressure rod (52) being reset upward by a reset spring (53), and the top end of the longitudinal pressure rod (52) being fixedly connected to an unlocking button (54) installed on the top of the trunk body (1); The length of the connecting rope (51) matches the distance between the pin bodies (41) on both sides when the spring lock pin (4) is locked.

8. The telescopic foldable backrest trunk of an electric bicycle according to claim 4, characterized in that: The spring lock pin (4) comprises a pin body (41) and a compression spring (42), and the pin head of the pin body (41) is arranged at an oblique angle to facilitate the backrest (2) to be stretched forward.

9. The telescopic foldable backrest trunk of an electric bicycle according to claim 2, characterized in that: The horizontal folding and telescopic mechanism is two left and right scissor-type telescopic rods (7) arranged on the back of the backrest (2); the second sliding limit device is two straight telescopic lifting rods (8) vertically fixed in the trunk body (1); the ends of the scissor-type telescopic rods (7) extend into the trunk body (1) and are connected to the straight telescopic lifting rods (8).

10. The telescopic foldable backrest trunk of an electric bicycle according to claim 2, characterized in that: The folding and telescopic mechanism comprises a first connecting plate (9) and a second connecting plate (91) connected in the middle by a straight telescopic lifting rod (8); the outward ends of the first connecting plate (9) and the second connecting plate (91) are respectively provided with a first connecting block (93) and a second connecting block (94) hinged by two 90-degree self-locking folding hinges (92); when the two 90-degree self-locking folding hinges (92) are in a locked state, the first connecting block (93) and the second connecting block (94) are respectively located on the two side surfaces of the first connecting plate (9) and the second connecting plate (91); the first connecting block (93) is connected to the back of the backrest (2); the second connecting block (94) is connected to the trunk body (1); and the third sliding limit device is limited by the self-unlocking function of the straight telescopic lifting rod (8).

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