Backpack and backpack connection assembly

Abstract

NOT VISIBLE DUE TO STATUS OF PATENT

Description

Backpacks and backpack connection components Technical Field

[0001] The utility model relates to the technical field of bags, in particular to a backpack and a backpack connecting assembly. Background Art

[0002] For bicycles (both human-powered and electric) with items placed behind the seatpost, the existing solution is typically to install a rear rack behind the seatpost for storing items. This rack can be used with bags to facilitate the loading of items. However, due to the added weight, appearance, and noise associated with installing a rear rack, which negatively impacts the riding experience, some cyclists are reluctant to install a rear rack.

[0003] Currently, there is a special bag for the rear of a bicycle that is directly fixed to the space behind the seat post by means of binding or brackets. Because it is a special bag, the user will not use it for daily use when not riding, so after stopping riding, the items in the special bag need to be transferred and loaded into a backpack for daily use; moreover, this special bag for the rear of a bicycle often adopts a special shape that is wide at the top and narrow at the bottom, otherwise it will interfere with the inner / back thighs of the rider and cause trouble to the rider. However, this wide at the top and narrow at the bottom structure will make the space utilization rate when loading items very low. Summary of the Invention

[0004] In order to overcome the defects of at least one of the above-mentioned prior arts, the present invention provides a backpack and a backpack connecting assembly, which integrates a backpack support system into the backpack. Not only can it be used as an ordinary backpack in daily life, but it can also be used in conjunction with a bicycle equipped with a connecting assembly to achieve quick disassembly and assembly. After the ride, the backpack can be disassembled, carried on the back, and taken away without the need to transfer items, thereby avoiding the need to install backpack supports (such as a rear rack) on the rear of the bicycle, effectively improving the overall appearance of the bicycle and reducing the weight of the bicycle. At the same time, during the riding process, it can avoid interference with the inner / back thighs of the rider and the interference with the rider's riding experience, thereby optimizing the riding experience.

[0005] The technical solution of the utility model is as follows:

[0006] In one aspect, the present invention provides a backpack comprising a backpack body and a first connector disposed on one side of the backpack body. The first connector can be deployed or concealed within the backpack body, and when deployed, the first connector is detachably connected to a second connector disposed on a bicycle seatpost. The first connector is connector C, and the second connector is connector C.

[0007] Preferably, the first connector is disposed on the bottom, front, or back of the backpack body. The bottom is the bottom surface of the backpack body when the backpack body is upright, the back is the side of the backpack body that contacts the user's back when the backpack body is carried, and the front is the side opposite to the back.

[0008] Preferably, it further comprises a connector A and a connector B, wherein the connector A and the connector B are respectively arranged on other side surfaces of the side surface where the first connector is located, and the connector A and the connector B can be connected to each other.

[0009] Preferably, connector A is arranged on the left side of the backpack body, connector B is arranged on the right side of the backpack body, and the first connector (i.e., connector C) is arranged at the bottom of the backpack body. The connector A is used to be detachably connected to connector a arranged on the left side of the bicycle seat, the connector B is used to be detachably connected to connector b arranged on the right side of the bicycle seat, and the connector C is used to be detachably connected to connector c arranged on the bicycle seat post. The connection between connector A and connector a, the connection between connector B and connector b, and the connection between connector C and connector c together constitute the supporting structure of the backpack body, and the connection between connector C and connector c allows there to be a distance between the backpack body and the seat post.

[0010] Preferably, a base is fixedly provided at the bottom of the backpack body, and a mounting groove is provided on the base. The mounting groove is connected to the outside at one end facing the seat rod, and the mounting groove is used to accommodate the connecting member C.

[0011] Preferably, the connecting member C is a sleeve, and includes a support rod and a clamp. The clamp clamps the seat post, and one end of the support rod is connected to the clamp. The support rod mates with the sleeve, and the support rod can be directly inserted into the sleeve and locked by a locking member. The locking member can be an external locking member such as a latch, or an internal locking member integrated into the support rod or sleeve.

[0012] Preferably, a sliding groove parallel to its length direction is provided in the installation groove, and the sleeve is slidably connected to the sliding groove. When the sleeve extends out of the installation groove, at least 1 / 3 of its length is still located in the installation groove, and the sleeve can be limited and locked at the end points of the sliding stroke.

[0013] Preferably, a rotating shaft 1 is provided in the mounting groove near the seat rod, one end of the sleeve is rotatably mounted on the rotating shaft 1, and a limiting cam is provided in the mounting groove away from the seat rod. When the angle between the sleeve and the mounting groove is 0, the limiting cam is used to limit the sleeve. When the angle between the sleeve and the mounting groove is 180°, at least 1 / 3 of the length of the sleeve is still located in the mounting groove.

[0014] Preferably, the sleeve is fixed in the mounting groove; one end of the support rod is hinged to the clamp, and the support rod can rotate within the range of 0-90° relative to the seat rod, and the support rod can be limited and locked when the angle between the support rod and the seat rod is 0° and 90°.

[0015] Preferably, the connector A and the connector a, and the connector B and the connector b can be connected by buckle connection, hook connection, binding connection or Velcro connection.

[0016] Preferably, the connector A and connector a, and the connector B and connector b are connected in a buckle-butted manner. Specifically: the connector A, connector B, connector a and connector b all include adjusting straps and fasteners, the length of the adjusting straps are adjustable, one end of the adjusting straps of the connector A and the adjusting straps of the connector B are connected to the fastener, and the other end are connected to the backpack body, one end of the adjusting straps of the connector a and the adjusting straps of the connector b are connected to the fastener, and the other end are connected to the seat, the fasteners of the connector A and the fasteners of the connector b are both male buckles, the fasteners of the connector a and the fasteners of the connector B are both female buckles, and the fasteners of the connector a and the fasteners of the connector b can be butted together.

[0017] On the other hand, the utility model provides a backpack connection assembly, comprising the above backpack and a second connection piece for connecting to a bicycle seat post.

[0018] The utility model provides another backpack connection assembly, comprising a second connection member for connecting to a bicycle seat post, a connection member a for connecting to the left side of a bicycle seat, and a connection member b for connecting to the right side of a bicycle seat.

[0019] The beneficial effects of the present invention are as follows:

[0020] (1) The backpack provided by the present invention can be quickly installed and removed from the bicycle through at least a detachable connection between the connecting member C and the connecting member C, so that the backpack can be firmly fixed to the bicycle through at least one connection point during riding, without the need for the rider to carry it on his back, and at the same time, the installation of a rear rack is eliminated, making riding easier; after arriving at the riding destination, the backpack can be quickly separated from the bicycle, and the rider does not need to transfer items from any bicycle-specific bag. The backpack can be removed and carried on the go, making it convenient for the rider to carry the backpack for other activities, and can be used as an ordinary backpack even when not riding;

[0021] (2) After the backpack provided by the utility model is assembled with a bicycle, there is sufficient space between the bottom of the backpack and the seat post to prevent the backpack from interfering with the rider's movements, thereby ensuring the riding experience and safety;

[0022] (3) The backpack provided by the present invention has a sleeve that can be extended, rotated or folded so that the sleeve can be stored in the installation slot of the base when the backpack is separated from the bicycle, without affecting the daily use of the backpack. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0024] FIG1 is a schematic structural diagram of a backpack and a backpack connection assembly provided by any one of Embodiments 1-3 of the present invention;

[0025] FIG2 is a schematic structural diagram of the base of a backpack provided by any one of Embodiments 1-3 of the present invention;

[0026] FIG3 is a schematic diagram of a backpack and a bicycle provided in a connected state according to a fourth embodiment of the present invention;

[0027] FIG4 is a schematic diagram of a backpack and a bicycle provided in a separated state according to a fourth embodiment of the present invention;

[0028] In the accompanying drawings, 1-backpack body, 11-connector A, 12-connector B, 13-connector C, 131-sleeve, 14-base, 141-mounting slot, 21-connector a, 22-connector b, 23-connector c, 231-hoop, 232-support rod, 31-seat, 32-seat post. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0030] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, for the purposes of describing the embodiments of the present application herein.

[0031] In this application, the terms "upper," "lower," "inner," and the like indicate positions or locations based on those shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0032] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0033] Furthermore, the terms "disposed," "provided with," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0034] Additionally, the term "plurality" shall mean two or more.

[0035] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] Example 1

[0037] This embodiment provides a backpack, as shown in Figures 1 and 2, comprising a backpack body 1 and a connector C13 disposed at the bottom of the backpack body 1. The connector C13 is a first connector. The connector C13 can be deployed or concealed within the backpack body 1. When deployed, the connector C13 detachably connects to a connector C23 disposed on a bicycle seat post 32. The connector C23 is a second connector. When the connector C13 is connected to the connector C23, the backpack body 1 is securely secured to the rear of the bicycle seat.

[0038] Specifically, the connector C13 is disposed at the bottom of the backpack body 1 , which is the bottom surface of the backpack body 1 when it is standing upright.

[0039] Of course, in some other embodiments, the connector C13 may also be provided on the back of the backpack body 1 , where the back is the side of the backpack body 1 that contacts the back of the user when the backpack is carried.

[0040] In some other embodiments, the connector C13 may also be provided on the front side of the backpack body 1 , where the front side is the side opposite to the back side.

[0041] In this embodiment, the connector C13 is deployed or hidden in the backpack body 1 by telescoping. Specifically, a mounting groove 141 is provided at the bottom of the backpack body 1, and a slide groove (not shown in the figure) is provided in the mounting groove 141 parallel to its length direction. The sleeve 131 is slidably connected to the slide groove. When the sleeve 131 extends out of the mounting groove 141, at least 1 / 3 of its length is still located in the mounting groove 141. The sleeve 131 can be limited and locked at the end points of the sliding stroke, so that the connector C13 can remain relatively fixed when deployed or hidden. Of course, in other embodiments, the movement mode of the connector C13 can also be other movement modes, such as folding, rotation, etc. The folding refers to the rotation of the connector C13 in a direction orthogonal to the surface on which it is located, and the rotation refers to the rotation of the connector C13 in a direction parallel to the surface on which it is located.

[0042] After expansion, connector C13 connects to connector C23 via a plug-in connection. Specifically, connector C23 has a slot for accommodating connector C13, which is fitted with a locking element. Once inserted, connector C13 is locked in place by the locking element, maintaining relative fixation between connectors C13 and C23. To release the connection, the locking element is first disengaged to release connector C13 from its restrained position. Connector C13 can then be removed.

[0043] Of course, in some other embodiments, the connector C13 and the connector c23 may also be connected in other ways, such as snap connection, bite connection, threaded connection, etc.

[0044] It should be noted that, in this embodiment, the specific forms of the backpack body include but are not limited to a backpack, a shoulder bag and a messenger bag.

[0045] First, this design allows the backpack to be firmly fixed to the bicycle during riding, without the need to install a rear rack on the bicycle or for the rider to carry it, making riding easier; second, there is enough space between the backpack and the seat post to prevent the backpack from interfering with the rider's movements; finally, after arriving at the riding destination, the backpack can be quickly separated from the bicycle and can be carried on the go.

[0046] Example 2

[0047] This embodiment provides a backpack. Referring to FIG1 , this embodiment further secures the backpack body 1 by providing a connector A11 and a connector B12 based on the embodiment 1. The connectors A11 and B12 are located on the other side of the side where the connector C13 is located, and the connectors A11 and B12 can be connected to each other. In this embodiment, the connectors A11 and B12 are buckles. Specifically, the connector A11 is a male buckle and the connector B12 is a female buckle. The connector A11 passes through the bicycle seat and connects to the connector B12, thereby increasing the firmness of the backpack body 1 and further preventing the backpack from shaking in different directions (left and right / front and back / up and down / rotation). It is understandable that the connectors A11 and B12 also have a certain load-bearing effect.

[0048] In some other embodiments, the connector A11 and the connector B12 can also be other structures that can cooperate with each other to be fixedly connected, such as hook docking, binding connection or Velcro adhesion. The connection method between the connector A11 and the connector B12 is well known to ordinary technicians in this field and will not be repeated here.

[0049] Example 3

[0050] This embodiment provides a backpack, as shown in Figure 1, including a backpack body 1, a connector A11 arranged on the left side of the backpack body 1, a connector B12 arranged on the right side of the backpack body 1, and a connector C13 arranged at the bottom of the backpack body 1, the connector A11 is used to be detachably connected to the connector a21 arranged on the left side of the bicycle seat 31, the connector B12 is used to be detachably connected to the connector b22 arranged on the right side of the bicycle seat 31, and the connector C13 is used to be detachably connected to the connector c23 arranged on the rod of the bicycle seat 31. The connection between the connector A11 and the connector a21, the connection between the connector B12 and the connector b22, and the connection between the connector C13 and the connector c23 together constitute the supporting structure of the backpack body 1, and the connection between the connector C13 and the connector c23 allows a distance to exist between the backpack body 1 and the seat rod 32.

[0051] It should be noted that after the backpack is assembled with the bicycle, the main force is borne by the connectors on the left and right sides (the connection between connector A11 and connector a21, and the connection between connector B12 and connector b22); and the main purpose of the bottom connector (the connection between connector C13 and connector c23) is to form a distance between the backpack body 1 and the seat post 32 to prevent the backpack from interfering with the inner / back thighs of the rider and causing interference to the rider; another purpose of the bottom connector is to limit the backpack from excessive left and right shaking and rotation during riding, thereby improving stability; in addition, the bottom connector can also provide auxiliary support during the assembly and disassembly of the backpack.

[0052] In this embodiment, to provide a stable and reliable mounting location for connector C13, a base 14 is fixedly mounted on the bottom of the backpack body 1. Base 14 is preferably made of plastic. As shown in FIG2 , base 14 has a mounting slot 141 formed therein. The end of mounting slot 141 facing the seat post 32 communicates with the exterior and accommodates connector C13. The base 14 also ensures that the backpack body 1 remains upright on a flat surface even when separated from the bicycle, preventing it from tipping over. To enhance the backpack's aesthetics, the base 14 may be covered with fabric.

[0053] In this embodiment, as shown in FIG2 , the connecting member C13 is specifically a sleeve 131 , and the connecting member C23 specifically includes a support rod 232 and a clamp 231 . The clamp 231 tightly holds the seat post 32 , and one end of the support rod 232 is connected to the clamp 231 . The support rod 232 matches the sleeve 131 , and the support rod 232 can be directly inserted into the sleeve 131 and locked by a latch.

[0054] That is, the connector C13 and the connector C23 are fixedly connected by inserting the support rod 232 into the sleeve 131 and locking it with a pin. The connector C13 and the connector C23 are preferably made of aluminum alloy. As shown in FIG2 , the sleeve 131 is preferably a sleeve 131 with a rounded rectangular cross-section, and the cross-sectional shape and size of the support rod 232 are preferably exactly matched with the sleeve 131. Compared with other shapes, this design can provide better strength and rigidity, increase the load-bearing capacity of the sleeve 131, make it more load-bearing and anti-extrusion, and prevent the backpack from shaking or rotating left and right during riding, thereby optimizing stability. The rounded corner design can reduce the bending stress concentration generated by the sleeve 131 during use, thereby improving its durability and service life.

[0055] It should be noted that the connection method between the connector C13 and the connector c23 includes but is not limited to sleeve docking or buckle docking; in some other embodiments, the sleeve 131 and the support rod 232 can also be connected by a threaded connection instead of a pin lock, and at this time the support rod 232 and the clamp 231 can be connected by a bearing rotation connection, which can also achieve the same effect; in some other embodiments, the positions of the sleeve 131 and the support rod 232 can also be swapped, that is, the connector C13 is specifically the support rod 232, and the connector c23 specifically includes the sleeve 131 and the clamp 231, which can also achieve the same effect.

[0056] Furthermore, a rotating shaft 1 is provided in the mounting groove 141 near the seat rod 32, and one end of the sleeve 131 is rotatably mounted on the rotating shaft 1. A limiting latch is provided in the mounting groove 141 away from the seat rod 32. When the angle between the sleeve 131 and the mounting groove 141 is 0, the limiting latch is used to limit the sleeve 131. When the angle between the sleeve 131 and the mounting groove 141 is 180°, at least 1 / 3 of the length of the sleeve 131 is still located in the mounting groove 141.

[0057] That is, in this embodiment, the sleeve 131 adopts a rotatable and foldable design. After such a design, when the backpack is separated from the bicycle, the sleeve 131 is completely stored in the mounting groove 141 of the base 14 without being exposed, and the angle between the sleeve 131 and the mounting groove 141 is 0°. The limiting convex has a limiting effect on the sleeve 131. When the bicycle needs to be loaded with the backpack, the user can manually rotate the sleeve 131 to overcome the restriction of the limiting convex and continue to rotate until the angle between the sleeve 131 and the mounting groove 141 is 180°. At this time, it can be inserted into the support rod 232, and then the connection between the two can be locked by the latch. Moreover, since at least 1 / 3 of the length of the sleeve 131 is still located in the installation groove 141 at this time, the lever principle can be used to increase the stability and load-bearing capacity of the connection; and the connection between the connector A11 and the connector a21, and the connection between the connector B12 and the connector b22 can play a role in assisting in fixing the backpack. After arriving at the riding destination, the connection between the connector A11 and the connector a21, the connection between the connector B12 and the connector b22, and the connection between the connector C13 and the connector c23 is released, and then the sleeve 131 is rotated back to a reset angle of 0 with the installation groove 141, and the backpack can be carried away.

[0058] It should be noted that, in this embodiment, the connecting member C13 is specifically a straight sleeve 131. In some other embodiments, the connecting member C13 may also adopt the structure of an isosceles triangle plate + a straight sleeve 131, that is, the straight sleeve 131 is embedded in the perpendicular bisector of the isosceles triangle plate, and the bottom edge of the isosceles triangle plate is hinged to the mounting groove 141, so as to achieve the effect of triangular support.

[0059] It should be noted that, in this embodiment, the specific forms of the backpack body include but are not limited to a backpack, a shoulder bag and a messenger bag.

[0060] In this embodiment, the connection methods that can be used between connector A11 and connector a21, and between connector B12 and connector b22 include but are not limited to buckle connection, hook connection, binding connection or Velcro adhesion.

[0061] More specifically, as shown in FIG1 , the connector A11, connector B12, connector a21, and connector b22 of this embodiment all include adjusting straps and buckles. The lengths of the adjusting straps are adjustable. One end of the adjusting straps of the connector A11 and the connector B12 is connected to the buckle, and the other end is connected to the backpack body 1 . One end of the adjusting straps of the connector a21 and the connector b22 is connected to the buckle, and the other end is connected to the seat 31 . The buckle of the connector A11 and the connector b22 are both male buckles, and the buckle of the connector a21 and the connector B12 are both female buckles. The buckle of the connector a21 and the connector b22 can be butted together.

[0062] It should be noted that after the user has fastened the fasteners of connector A11 to the fasteners of connector a21, and the fasteners of connector B12 to the fasteners of connector b22, they must ensure that the adjustment straps of each connector are tensioned. This ensures that the primary force of the backpack falls on the left and right connectors, minimizing damage to the bottom connector and extending the service life of the connector components.

[0063] With this design, not only can the connectors A11 and a21, as well as the connectors B12 and b22, be quickly assembled and disassembled, but the connectors a21 and b22 can also be interlocked when there is no need to mount a backpack, thereby preventing the connectors a21 and b22 from swinging violently with the bicycle body when the bicycle is used without a backpack, thereby preventing interference with riding.

[0064] This embodiment also provides a backpack connection assembly, as shown in Figure 1, including the backpack described above, and also including a connector a21 for connecting to the left side of the bicycle seat 31, a connector b22 for connecting to the right side of the bicycle seat 31, and a connector c23 for connecting to the rod of the bicycle seat 31, wherein the connector a21, the connector b22 and the connector c23 are all fixedly connected to the bicycle, and more preferably, a detachable fixed connection is adopted so that they can be replaced in the event of local failure or damage.

[0065] Example 4

[0066] This embodiment provides a backpack, as shown in Figures 3 and 4. The backpack is substantially the same as the backpack provided in Example 3. The difference between the backpack and the backpack is that:

[0067] In this embodiment, the sleeve 131 is fixed in the mounting groove 141; and one end of the support rod 232 is hinged to the clamp 231, and the support rod 232 can rotate within the range of 0-90° relative to the seat rod 32, and the support rod 232 can be limited and locked when the angle between them is 0° and 90°.

[0068] That is, in this embodiment, the sleeve 131 adopts a fixed design, while the support rod 232 adopts a rotatable and foldable design; after such a design, when the bicycle needs to be used with a load backpack, the user can rotate the support rod 232 to form a 90° angle with the seat post 32. At this time, the support rod 232 is facing the sleeve 131 horizontally arranged in the mounting groove 141. The backpack can be moved so that the sleeve 131 is put on the support rod 232, and the connection between the two is locked by the pin, and the connection between the connector A11 and the connector a21 and the connection between the connector B12 and the connector b22 can play a role in assisting in fixing the backpack; after arriving at the riding destination, the connection between the connector A11 and the connector a21, the connection between the connector B12 and the connector b22, and the connection between the connector C13 and the connector c23 is released, and then the support rod 232 is rotated back to a zero angle with the seat post 32, so as to reduce the presence of the support rod 232 and the backpack can be carried away directly.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A backpack, characterized in that: The backpack comprises a backpack body and a first connecting piece arranged at one side of the backpack body. The first connecting piece can be unfolded on or hidden in the backpack body. When unfolded, the first connecting piece is detachably connected to a second connecting piece arranged on a bicycle seat pole.

2. The backpack according to claim 1, characterized in that: The first connecting piece is arranged on the bottom, front or back of the backpack body.

3. The backpack according to claim 2, characterized in that: It also includes a connector A and a connector B, wherein the connector A and the connector B are arranged on other side surfaces of the side surface where the first connector is located.

4. The backpack according to claim 3, characterized in that: The connector A is arranged on the left side of the backpack body, the connector B is arranged on the right side of the backpack body, the first connector is arranged at the bottom of the backpack body, the first connector is connector C, the connector A is used to be detachably connected to the connector a arranged on the left side of the bicycle seat, the connector B is used to be detachably connected to the connector b arranged on the right side of the bicycle seat, the connector C is used to be detachably connected to the connector c arranged on the bicycle seat post, and the connector c is the second connector. The connection between the connector A and the connector a, the connection between the connector B and the connector b, and the connection between the connector C and the connector c together constitute the supporting structure of the backpack body, and the connection between the connector C and the connector c allows a distance to exist between the backpack body and the seat post.

5. The backpack according to claim 4, characterized in that: A base is fixedly provided at the bottom of the backpack body, and a mounting groove is provided on the base. The mounting groove is connected to the outside at one end facing the seat rod, and the mounting groove is used to accommodate the connecting member C.

6. The backpack according to claim 5, characterized in that: The connecting member C is specifically a sleeve, and the connecting member C specifically includes a support rod and a clamp. The clamp clamps the seat post, one end of the support rod is connected to the clamp, the support rod matches the sleeve, and the support rod can be directly inserted into the sleeve and locked by a locking member.

7. The backpack according to claim 6, characterized in that: The installation groove is provided with a sliding groove parallel to its length direction, and the sleeve is slidably connected to the sliding groove. When the sleeve extends out of the installation groove, at least 1 / 3 of its length is still located in the installation groove, and the sleeve can be limited and locked at the end points of the sliding stroke.

8. The backpack according to claim 6, characterized in that: A rotating shaft 1 is arranged in the installation groove near the seat rod, one end of the sleeve is rotatably mounted on the rotating shaft 1, and a limiting cam is arranged in the installation groove away from the seat rod. When the angle between the sleeve and the installation groove is 0, the limiting cam is used to limit the sleeve. When the angle between the sleeve and the installation groove is 180°, at least 1 / 3 of the length of the sleeve is still located in the installation groove.

9. The backpack according to claim 6, characterized in that: The sleeve is fixed in the mounting groove; one end of the support rod is hinged to the clamp, and the support rod can rotate within the range of 0-90° relative to the seat rod, and the support rod can be limited and locked when the angle between the support rod and the seat rod is 0° and 90°.

10. The backpack according to claim 4, characterized in that: The connection between the connector A and the connector a, and between the connector B and the connector b can be connected by buckle connection, hook connection, binding connection or Velcro adhesion.

11. The backpack according to claim 10, characterized in that: The connectors A and B, as well as the connectors B and b, are connected by a plug-in buckle docking connection method. Specifically, the connectors A, B, a and b all include adjusting straps and buckles. The length of the adjusting straps is adjustable. One ends of the adjusting straps of the connectors A and B are connected to the buckles, and the other ends are connected to the backpack body. One ends of the adjusting straps of the connectors a and b are connected to the buckles, and the other ends are connected to the seat. The buckles of the connectors A and b are both male buckles, and the buckles of the connectors a and B are both female buckles. The buckles of the connectors a and b can be docked and buckled.

12. A backpack connection assembly, characterized in that: The backpack comprises the backpack as claimed in any one of claims 1 to 11, further comprising a second connecting member for connecting to a bicycle seat post.

13. A backpack connection assembly, characterized in that: The backpack comprises a backpack as claimed in any one of claims 4 to 11, further comprising a second connector for connecting to a bicycle seat post, a connector a for connecting to one side of a bicycle seat, and a connector b for connecting to the other side of the bicycle seat.