Backpack bottom wheel structure

Abstract

The utility model discloses a knapsack bottom wheel structure which is arranged at the bottom of a knapsack main body and comprises four bottom wheel assemblies, and the four bottom wheel assemblies are arranged at four corners of the bottom of the knapsack main body; the bottom wheel assembly comprises a base and bottom wheels, the base is fixedly connected to the outer side of the bottom face of the backpack body, and the tops of the bottom wheels used for rolling on the ground are detachably connected to the base. According to the knapsack bottom wheel structure, the bottom wheels are installed through a detachable structure, the bottom wheels are detached when the knapsack is carried on the back, and clothes are prevented from being stained by the bottom wheels.

Description

Technical Field

[0001] The utility model relates to the technical field of backpacks, in particular to a bottom wheel structure of a backpack. Background Art

[0002] Existing backpacks can usually only be carried on the back or in hand, and cannot be dragged on a flat surface like a trolley case. In the lobby of a train station, bus station or airport, the bottom surface is flat and smooth. If the backpack cannot be dragged, the user needs to carry the heavy backpack for a long time, which increases the burden on the user.

[0003] The utility model patent with publication number CN202566684U discloses a trolley backpack. The backpack in this patented technology can be used as both a trolley bag and a backpack. The backpack is provided with one-way wheels on both sides of the bottom, and the one-way wheels are installed in a semi-recessed manner. The above-mentioned two-purpose bag has the following defects: when the backpack is carried on the shoulders, the one-way wheels will touch the user's clothes after rolling on the ground, causing the user's clothes to become dirty or worn.

[0004] Therefore, it is necessary to develop a backpack bottom wheel structure for the above-mentioned defects. Utility Model Content

[0005] The utility model aims to provide a backpack bottom wheel structure, which adopts a detachable structure to install the bottom wheels. The bottom wheels can be disassembled when the backpack is in use, so as to avoid the bottom wheels from soiling clothes.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The bottom wheel structure of the backpack of the utility model is arranged at the bottom of the backpack body, and includes a bottom wheel assembly, wherein four bottom wheel assemblies are arranged at four corners of the bottom of the backpack body; the bottom wheel assembly includes a base and a bottom wheel, the base is fixedly connected to the outer side of the bottom surface of the backpack body, and the top of the bottom wheel for rolling on the ground is detachably connected to the base.

[0008] Furthermore, the four corners of the base are provided with rivet holes and are connected to the bottom surface of the backpack body through rivets.

[0009] Furthermore, a slot is provided on the bottom surface of the base, and a top plate is provided on the top of the bottom wheel. The cross-sections of the top plate and the slot are both T-shaped, and the top plate is inserted into the slot for connection.

[0010] Furthermore, the bottom wheel also includes a rotating shaft and a roller. A rotating shaft sleeve is arranged in the center of the bottom surface of the top plate. The top of the rotating shaft is rotatably connected to the rotating shaft sleeve. The elbow at the bottom end of the rotating shaft is rotatably connected to the rollers on both sides through the wheel axle.

[0011] Furthermore, the slot is not opened throughout the entire length, a locking hole is centrally provided on the side wall at the end of the slot, a locking tongue is centrally provided on the side wall at the end of the top plate, and the locking tongue is inserted into the locking hole for anti-slip locking.

[0012] Furthermore, the locking tongue is integrally formed with a spring structure on the side wall of the top plate end, a wedge-shaped block is provided on the top surface of the cantilever end of the locking tongue, and the top surface of the wedge-shaped block is provided with anti-slip grooves.

[0013] Furthermore, the bottom surface of the base is provided with anti-slip patterns on both sides of the slot.

[0014] Compared with the prior art, the beneficial technical effects of the present invention are:

[0015] This practical backpack wheel structure features a base fixed to the outside of the bottom surface of the backpack body. The base is detachably connected to the wheels. When used as a trolley bag, the wheels are installed. When not in use, the wheels are removed and stored separately inside the backpack. This prevents the wheels from rolling on the ground and causing scratches or stains on the user's clothing. This utility model utilizes a detachable structure to mount the wheels, allowing them to be removed when carried, preventing them from staining clothing.

[0016] Furthermore, by designing both the top plate and slot into a T-shaped cross-section, the design facilitates implementation and provides greater structural strength. The coordination of the shaft sleeve and shaft allows for wheel steering, enhancing the backpack's flexibility. The coordinated arrangement of the locking tongue and locking hole prevents the top plate from falling out of the slot due to vibration during use. A wedge-shaped block with anti-slip grooves on the top surface of the cantilevered end of the locking tongue significantly improves its ability to prevent it from falling out. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of a backpack with the backpack bottom wheel structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the bottom wheel structure of the backpack of the utility model;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the bottom wheel structure of the backpack of the utility model from another angle;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the base of the utility model;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the bottom wheel of the present utility model.

[0023] Explanation of the accompanying reference numerals: 1. backpack body; 2. base; 201. rivet hole; 202. slot; 203. locking hole; 3. bottom wheel; 301. top plate; 3011. insert; 3012. shaft sleeve; 302. shaft; 303. roller; 304. locking tongue. DETAILED DESCRIPTION

[0024] The core of the utility model is to provide a backpack bottom wheel structure, which adopts a detachable structure to install the bottom wheels. The bottom wheels can be disassembled when the backpack is in use, so as to avoid the bottom wheels from soiling clothes.

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0027] With reference to the accompanying drawings, Figure 1 It is a schematic diagram of the three-dimensional structure of a backpack with the backpack bottom wheel structure of the utility model; Figure 2 This is a schematic diagram of the three-dimensional structure of the bottom wheel structure of the backpack of the utility model; Figure 3 This is a schematic diagram of the three-dimensional structure of the bottom wheel structure of the backpack of the utility model from another angle; Figure 4 This is a schematic diagram of the three-dimensional structure of the base of the utility model; Figure 5 This is a schematic diagram of the three-dimensional structure of the bottom wheel of the present utility model.

[0028] In one embodiment, Figures 1 to 5 As shown, the present invention's backpack wheel structure is located at the bottom of the backpack body 1 and includes a wheel assembly. Four wheel assemblies are positioned at the four corners of the backpack body 1. The backpack body 1 includes shoulder straps and a handle. When towing, the user pulls on the straps to roll the wheel assembly on the ground, thereby assisting walking. The wheel assembly includes a base 2 and wheels 3. The base 2 is fixedly connected to the outside of the bottom surface of the backpack body 1. The top of the wheels 3, which are used for rolling on the ground, is detachably connected to the base 2.

[0029] The base 2 is fixedly mounted on the outer side of the bottom surface of the backpack body 1, and the base 2 is detachably connected to the bottom wheels 3. When the backpack is used as a trolley bag, the bottom wheels 3 are installed. When not in use, the bottom wheels 3 are removed and stored separately in the backpack. This prevents the bottom wheels 3 from rolling on the ground and causing scratches or stains to the user's clothes when the user is carrying the backpack.

[0030] In a specific embodiment of the present invention, Figures 2-4 As shown, the four corners of the base 2 are provided with rivet holes 201 and are connected to the bottom surface of the backpack body 1 via rivets. The base 2 and the bottom wheel 3 are both made of plastic. The rivet holes 201 are trapezoidal holes. The base 2 is fixed to the bottom fabric of the backpack body 1 via rivets or plastic rivet countersunk settings.

[0031] Obviously, the base 2 can also be connected to the base fabric of the backpack body 1 by gluing or sewing. Similar simple replacement methods all fall within the scope of protection of the present invention.

[0032] In a specific embodiment of the present invention, Figures 2 to 5 As shown, the bottom surface of the base 2 is provided with a slot 202, extending along the width of the base 2 and located in the middle of the base 2. A top plate 301 is provided on top of the bottom wheel 3. Both the top plate 301 and the slot 202 have T-shaped cross-sections, meaning thinned inserts 3011 are provided on either side of the top plate 301. The inserts 3011 fit into the side grooves of the slot 202 for connection.

[0033] Specifically, if Figure 2 、 Figure 3 and Figure 5 As shown, the bottom wheel 3 also includes a rotating shaft 302 and rollers 303. A rotating shaft sleeve 3012 is centrally located on the bottom surface of the top plate 301. The cylindrical head with an enlarged diameter at the top of the rotating shaft 302 is rotatably connected to the rotating shaft sleeve 3012. A horizontally mounted wheel axle is fixedly connected to the elbow at the bottom end of the rotating shaft 302. The ends of the wheel axle are rotatably connected to the rollers 303 on either side. This means that the bottom wheel 3 is a universal wheel, allowing it to steer as the user pulls it.

[0034] Obviously, the bottom wheel 3 can also use a fixed wheel, and further can also use a fixed wheel or a universal wheel with a braking mechanism. Similar simple replacement methods all fall within the scope of protection of the present invention.

[0035] By setting the cross-sections of the top plate 301 and the slot 202 to a T-shaped profile, it is easy to implement and has greater structural strength; through the cooperation of the rotating shaft sleeve 3012 and the rotating shaft 302, the steering of the roller 303 is achieved, thereby improving the flexibility of the backpack.

[0036] In a specific embodiment of the present invention, Figures 2 to 5 As shown, the slot 202 is not opened through the length, and a locking hole 203 is provided in the center of the side wall of the slot 202 end. A locking tongue 304 is provided in the center of the side wall of the top plate 301 end, and the locking tongue 304 is inserted in the locking hole 203 to prevent it from falling off and locking.

[0037] Specifically, if Figures 3-5 As shown, the locking tongue 304 is an integral spring-loaded structure formed on the sidewall of the top plate 301. A wedge-shaped block with anti-slip grooves is positioned on the top surface of the cantilevered end of the locking tongue 304. Once the locking tongue 304 is inserted into the locking hole 203, the straight sidewall of the wedge locks onto the sidewall of the base 2, preventing it from falling off due to vibration during use.

[0038] The coordinated arrangement of the locking tongue 304 and the locking hole 203 can prevent the top plate 301 from falling out of the slot 202 due to vibration during use; and the anti-falling effect is significantly improved by arranging a wedge-shaped block with anti-slip grooves on the top surface of the cantilever end of the locking tongue 304.

[0039] In a specific embodiment of the present invention, the bottom surface of the base 2 is provided with anti-skid patterns on both sides of the slot 202. When the base 2 is not installed, the anti-skid patterns on the bottom surface of the base 2 are in contact with the smooth ground, which can prevent tipping.

[0040] The installation and use process of the backpack bottom wheel structure of this embodiment is as follows: When the user wants to use it as a trolley bag, lift the backpack body 1, turn it over, and face the bottom side upwards. Check whether there is any foreign matter blocking the slots 202 of each base 2. If there is, it needs to be cleaned first. Hold the bottom wheel 3 and align the insert strips 3011 on both sides of the top plate 301 with the side grooves of the slots 202, and insert it inward from the outside with force. Before insertion, pay attention to the direction of the locking tongue 304 facing the locking hole 203, and do not install it upside down. Insert it to the bottom, and the locking tongue 304 completely enters the locking hole 203. The straight side wall of the wedge block on the locking tongue 304 abuts against the outer wall of the base 2 to prevent the bottom wheel 3 from falling out. Repeat this operation until the other three bottom wheels 3 are all installed in place. Then put the backpack body 1 upright on the ground, and the user pulls the shoulder straps to drive the bottom wheel 3 to roll on the ground to assist walking.

[0041] In summary, the present invention provides a backpack bottom wheel structure, wherein a base 2 is fixedly mounted on the outside of the bottom surface of the backpack body 1, and the base 2 is detachably connected to the bottom wheel 3. When the backpack is used as a trolley bag, the bottom wheel 3 is installed. When not in use, the bottom wheel 3 is removed and stored separately in the backpack. This prevents the bottom wheel 3 from rolling on the ground and injuring the user or soiling the user's clothes when the user is carrying the backpack. In addition, by setting the cross-sections of the top plate 301 and the slot 202 to a T-shaped profile, the structure is easy to implement and has greater structural strength; by cooperating with the rotating shaft sleeve 3012 and the rotating shaft 302, the steering of the roller 303 is achieved, thereby improving the flexibility of the backpack. By cooperating with the locking tongue 304 and the locking hole 203, the top plate 301 can be prevented from falling out of the slot 202 due to vibration during use; by setting a wedge-shaped block with anti-slip grooves on the top surface of the cantilever end of the locking tongue 304, the anti-falling effect is significantly improved.

[0042] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0043] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A backpack bottom wheel structure, arranged at the bottom of a backpack body (1), characterized in that: It comprises a bottom wheel assembly, wherein four bottom wheel assemblies are arranged at four corners of the bottom of the backpack body (1); the bottom wheel assembly comprises a base (2) and a bottom wheel (3), wherein the base (2) is fixedly connected to the outer side of the bottom surface of the backpack body (1), and the top of the bottom wheel (3) for rolling on the ground is detachably connected to the base (2); The base (2) is provided with riveting holes (201) at four corners and is connected to the bottom surface of the backpack body (1) via riveting pieces; The bottom surface of the base (2) is provided with a slot (202), and the top of the bottom wheel (3) is provided with a top plate (301), the cross-sections of the top plate (301) and the slot (202) are both T-shaped, and the top plate (301) is inserted into the slot (202) for connection.

2. The backpack bottom wheel structure according to claim 1, characterized in that: The bottom wheel (3) further comprises a rotating shaft (302) and a roller (303); a rotating shaft sleeve (3012) is centrally arranged on the bottom surface of the top plate (301); the top of the rotating shaft (302) is rotatably connected to the rotating shaft sleeve (3012); and the bottom elbow of the rotating shaft (302) is rotatably connected to the rollers (303) on both sides via a wheel axle.

3. The backpack bottom wheel structure according to claim 1, characterized in that: The slot (202) is not opened throughout the entire length, a locking hole (203) is centrally provided on the end side wall of the slot (202), a locking tongue (304) is centrally provided on the end side wall of the top plate (301), and the locking tongue (304) is inserted into the locking hole (203) for anti-drop locking.

4. The backpack bottom wheel structure according to claim 3, characterized in that: The locking tongue (304) is integrally formed with a spring sheet structure on the side wall of the top plate (301), a wedge block is arranged on the top surface of the cantilever end of the locking tongue (304), and anti-slip grooves are arranged on the top surface of the wedge block.

5. The backpack bottom wheel structure according to claim 1, characterized in that: The bottom surface of the base (2) is provided with anti-slip patterns on both sides of the slot (202).

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