Trolley backpack

Abstract

The utility model discloses a draw-bar knapsack which comprises a knapsack body, a bottom shell, bottom wheels and a draw bar, the bottom shell is fixedly connected to the bottom of the knapsack body, cuboid bottom wheel grooves are formed in the four corners of the bottom face of the bottom shell, the tops of the bottom wheels are hinged to one ends of the bottom wheel grooves through pin shafts, and the draw bar is arranged in the bottom wheel grooves. The bottom wheels can lie in the bottom wheel grooves and can also be vertically arranged, so that the rolling wheels extend out of the bottom wheel grooves; an interlayer is arranged in the side wall, making contact with the back of a user, of the backpack body, the pull rod is arranged in the interlayer, and a hidden cover capable of being opened is arranged at the top of the interlayer. According to the draw-bar knapsack disclosed by the utility model, the hidden draw bar and the foldable bottom wheels are adopted, so that the draw-bar knapsack is convenient to carry along with the knapsack after being folded, and clothes of a user cannot be stained.

Description

Technical Field

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

[0002] Existing ordinary backpacks can usually only be carried on the back or in hand, and cannot be dragged on a flat ground like a trolley case. In the lobby of a railway station, a bus station or an 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] As people's needs grow, some backpacks with trolleys have gradually appeared, which can be carried on the back or dragged as a trolley case. The utility model patent with announcement number CN202566684U discloses a trolley backpack. The backpack in the patent technology can be used as a trolley bag and a backpack. The two sides of the bottom of the backpack are provided with one-way wheels, which are installed in a semi-recessed manner. The above two-purpose bag has the following defects: when the backpack is carried on the shoulder, the one-way wheels will touch the user's clothes after rolling on the ground, making the user's clothes dirty or worn. The utility model patent with the announcement number CN216601977U discloses a detachable pull rod backpack, including a backpack and a pull rod mechanism, wherein the pull rod mechanism is arranged on one side of the backpack, a mounting plate is fixedly installed on the lower surface of the backpack, a handle is fixedly connected to the upper surface of the backpack, a shoulder strap is fixedly connected to one side of the backpack, a fixing piece is fixedly connected to one side of the backpack near the middle position, a first Velcro is fixedly connected to the surface of one side of the backpack near the fixing piece, and a second Velcro is fixedly connected to one side of the fixing piece. The utility model is provided with a mounting plate, a pull rod mechanism, a fixing piece, a fixing plate and a limiting column, and the end of the support rod is separated from the limiting column by twisting the support rod, and the support rod and the fixing plate are removed in turn, and the user's clothes are prevented from being soiled by disassembly. However, the disassembled pull rod mechanism, fixing plate and roller are not conducive to carrying around, and actually increase the burden of the user when not in use.

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

[0005] The utility model aims to provide a trolley backpack which adopts a hidden trolley and foldable bottom wheels. After being folded, the backpack is easy to carry and will not stain the user's clothes.

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

[0007] The utility model comprises a trolley backpack, comprising a backpack body, a bottom shell, bottom wheels and a pull rod, wherein the bottom shell is fixedly connected to the bottom of the backpack body, and rectangular bottom wheel grooves are provided at four corners of the bottom surface of the bottom shell, and the top of the bottom wheel is hinged to one end of the bottom wheel groove through a pin shaft, and the bottom wheel can lie flat in the bottom wheel groove or be arranged upright so that the roller protrudes out of the bottom wheel groove; an interlayer is provided in the side wall of the backpack body that contacts the back of the user, the pull rod is provided in the interlayer, and an openable hidden cover is provided on the top of the interlayer.

[0008] Furthermore, the pull rod is a telescopic rod arranged along the vertical direction, and the top of the telescopic rod is a pull rod head that can be pulled outward; the pull rod head is stored directly below the hidden cover, and the hidden cover is closed with a zipper.

[0009] Furthermore, it also includes a latch, and the bottom shell is provided with a latch groove on the bottom surface of one end of the pin shaft. The latch is installed in the latch groove and is parallel to the axis of the pin shaft. The inner end of the latch enters the bottom wheel groove to limit the rotation angle of the bottom wheel.

[0010] Furthermore, a limiting groove and a limiting hole are provided on the top side plate of the bottom wheel, and the axis lines of the limiting groove and the limiting hole are parallel to the rotating shaft hole for installing the pin shaft; the inner end of the pin can be inserted into the limiting groove or the limiting hole to limit the rotation angle of the bottom wheel.

[0011] Furthermore, the latch also includes a compression spring and a toggle head, the toggle head protrudes out of the latch slot and the root is connected to the side wall of the latch, the compression spring is coaxially sleeved on the rear end of the latch and pushes the latch toward the bottom wheel.

[0012] Furthermore, a hard plate is provided inside the side wall of the backpack body that contacts the user's back to separate the pull rods, and the hard plate is a hard cardboard or a plastic plate.

[0013] Furthermore, the top side plate of the bottom wheel in the stowed state protrudes out of the bottom surface of the bottom shell body to play a supporting role.

[0014] Furthermore, the bottom wheel is a universal wheel, and the bottom of the bottom wheel is connected to the roller shaft of the roller through a rotating shaft.

[0015] Compared with the prior art, the beneficial technical effects of the utility model are:

[0016] The utility model trolley backpack has a trolley disposed in the interlayer of the back side wall of the backpack body, and the trolley is hidden and stored, so that it does not get in the way when the backpack is used normally; the bottom wheel is hinged to one end of the bottom wheel groove through a pin, so that it is hidden and stored when lying flat, and can be used normally as a roller of a trolley case when standing upright. The hidden bottom wheel allows the roller, which is most easily dirty, to be hidden in the bottom wheel groove, thereby avoiding contact with the user's clothes. The utility model trolley backpack adopts a hidden trolley and a foldable bottom wheel, so that it is easy to carry with the bag after being folded, and will not dirty the user's clothes.

[0017] In addition, by setting the pull rod as a telescopic rod along the vertical direction, after opening the hidden cover, quick switching can be achieved by pulling the pull rod head. Through the setting of the latch, the angle of rotation of the bottom wheel around the pin can be locked, that is, the collection state and working state of the bottom wheel can be switched. By adding a compression spring and a toggle head, the compression spring causes the latch to reset toward the bottom wheel, reducing the risk of loosening. The toggle head facilitates the user's finger to toggle the latch so that the inner end of the bottom wheel is disengaged from the top side plate of the bottom wheel backwards, which is convenient for switching between the collection state and the working state. By reasonably setting the height position of the top side plate of the bottom wheel so that it protrudes from the bottom surface of the bottom shell, when the backpack of the utility model is used as an ordinary backpack, the bottom surface of the backpack can be directly placed on the bottom surface, and the top of the wheel plays a supporting role. By setting the bottom wheel as a universal wheel, it can be flexibly turned. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the main structure of the trolley backpack of the utility model;

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the trolley backpack of the utility model;

[0021] Figure 3 This is a bottom view of the structure of the bottom shell of the utility model;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the bottom wheel of the utility model.

[0023] Explanation of the reference numerals: 1. backpack body; 101. handle; 102. hidden cover; 2. bottom shell; 201. bottom wheel groove; 202. latch groove; 3. bottom wheel; 301. shaft hole; 302. limit groove; 303. limit hole; 304. shaft; 305. roller; 4. pin shaft; 5. latch; 501. toggle head; 6. pull rod; 601. pull rod head. DETAILED DESCRIPTION

[0024] The core of the utility model is to provide a trolley backpack, which adopts a hidden trolley and bottom wheels that can be folded and stowed. After being stowed, the backpack is easy to carry and will not stain the user's clothes.

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

[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, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] With reference to the accompanying drawings, Figure 1 It is a schematic diagram of the main structure of a trolley backpack of the utility model; Figure 2 It is a three-dimensional structural schematic diagram of the trolley backpack of the utility model; Figure 3 This is a bottom view of the structure of the bottom shell of the utility model; Figure 4 It is a schematic diagram of the three-dimensional structure of the bottom wheel of the utility model.

[0028] In a specific embodiment, Figures 1 to 4 As shown, the utility model trolley backpack includes a backpack body 1, a bottom shell 2, a bottom wheel 3 and a pull rod 6. The side wall of the backpack body 1 that contacts the back of the user is provided with a shoulder strap, and a handle 101 for easy hand-carrying is sewn on the top of the backpack body 1. The bottom shell 2 is an injection-molded plastic shell structure, and the bottom shell 2 is fixed to the bottom of the backpack body 1 by sewing, gluing or snap connection. The bottom surface of the bottom shell 2 is provided with a rectangular bottom wheel groove 201 at four corners, and the four bottom wheel grooves 201 are arranged regularly. The top of the bottom wheel 3 is hinged to one end of the bottom wheel groove 201 through a pin 4, and the bottom wheel 3 can lie flat in the bottom wheel groove 201 or can be erected so that the roller 305 protrudes out of the bottom wheel groove 201. An interlayer is provided in the side wall of the backpack body 1 that contacts the back of the user, and the pull rod 6 is provided in the interlayer, and a hidden cover 102 that can be opened is provided on the top of the interlayer.

[0029] By setting a pull rod 6 in the interlayer of the back side wall of the backpack body 1, the pull rod 6 is hidden and stored, and does not get in the way when the backpack is used normally; the bottom wheel 3 is hinged to one end of the bottom wheel groove 201 through the pin 4, and is hidden and stored when lying flat, and can be used normally as a roller of a trolley case when standing upright. The hidden bottom wheel 3 allows the roller 305, which is most easily dirty, to be hidden in the bottom wheel groove 201, avoiding contact with the user's clothes. The utility model trolley backpack adopts a hidden pull rod and a foldable bottom wheel, which is easy to carry with the bag after being folded, and will not dirty the user's clothes.

[0030] In a specific embodiment of the present invention, Figure 1 As shown, the pull rod 6 is a telescopic rod arranged along the vertical direction, and the telescopic rod is a sleeve structure. The top of the telescopic rod is a pull rod head 601 that can be pulled outward, and the pull rod head 601 is a short cross bar, and the whole is T-shaped. The pull rod head 601 is stored directly under the hidden cover 102, and the hidden cover 102 is closed with a zipper.

[0031] Obviously, the hidden cover 102 can also be closed by Velcro or snaps, and similar simple replacement methods fall within the protection scope of the present invention.

[0032] Specifically, a hard plate with spaced pull rods 6 is arranged inside the side wall of the backpack body 1 that contacts the user's back. The hard plate is made of hard cardboard or plastic.

[0033] By setting the pull rod 6 as a telescopic rod along the vertical direction, after opening the hidden cover 102, pulling the pull rod head 601 can achieve rapid switching.

[0034] In a specific embodiment of the present invention, Figures 2 to 4 As shown, the trolley backpack of the utility model further includes a latch 5, and a latch groove 202 is formed on the bottom surface of the bottom shell 2 at one end of the pin shaft 4. The latch 5 is installed in the latch groove 202 and is parallel to the axis of the pin shaft 4. The latch 5 can slide along the latch groove 202. The inner end of the latch 5 inserted into the bottom wheel groove 201 limits the rotation angle of the bottom wheel 3.

[0035] Specifically, if Figures 2 to 4 As shown, a limiting groove 302 and a limiting hole 303 are provided on the top side plate of the bottom wheel 3, and the axis lines of the limiting groove 302 and the limiting hole 303 are parallel to the rotating shaft hole 301 of the mounting pin 4. The inner end of the latch 5 can be inserted into the limiting groove 302 or the limiting hole 303 to limit the rotation angle of the bottom wheel 3. When the inner end of the latch 5 is inserted into the limiting groove 302, the bottom wheel 3 is in a storage state lying flat in the bottom wheel groove 201. When the inner end of the latch 5 is inserted into the limiting hole 303, the bottom wheel 3 is in an upright working state.

[0036] Specifically, if Figure 2 and Figure 4 As shown, the latch 5 also includes a compression spring and a toggle head 501. The toggle head 501 protrudes outside the latch slot 202 and its root is connected to the side wall of the latch 5. The compression spring is coaxially sleeved on the rear end of the latch 5 and pushes the latch 5 toward the bottom wheel 3.

[0037] By setting the latch 5, the angle of rotation of the bottom wheel 3 around the pin 4 can be locked, that is, the storage state and the working state of the bottom wheel 3 can be switched. By adding a compression spring and a toggle head 501, the compression spring makes the latch 5 return to the bottom wheel 3, reducing the risk of loosening. The toggle head 501 is convenient for the user to toggle the latch 5 with his fingers, so that the inner end of the latch 5 is disengaged from the top side plate of the bottom wheel 3 backwards, which is convenient for switching between the storage state and the working state.

[0038] In a specific embodiment of the present invention, Figure 1 and Figure 2 As shown, in the stowed state, the top side plate of the bottom wheel 3 protrudes out of the bottom surface of the bottom shell 2 to play a supporting role.

[0039] By reasonably setting the height of the top side plate of the bottom wheel 3 so that it protrudes from the bottom surface of the bottom shell 2, when the backpack of the utility model is used as an ordinary backpack, the bottom surface of the backpack can be directly placed on the bottom surface, and the top of the wheel 3 plays a supporting role.

[0040] In a specific embodiment of the present invention, Figure 4 As shown, the bottom wheel 3 is a universal wheel, and the bottom of the bottom wheel 3 is connected to the roller shaft of the roller 305 through a rotating shaft 304. The root of the rotating shaft 304 is connected to the middle position of the bottom plate at the top of the bottom wheel 3 through a rotating shaft sleeve.

[0041] By setting the bottom wheel 3 as a universal wheel, the vehicle can be flexibly turned.

[0042] The process of using the trolley backpack of this embodiment is as follows: when the user wants to use it as a trolley case, he lifts up the backpack body 1, turns it over, and faces the bottom surface upward. Check whether the bottom wheel grooves 201 of each bottom shell 2 are all equipped with bottom wheels 3, and whether there are foreign objects blocking them. If there are, they need to be cleaned up first. The finger moves the toggle head 501 inward, so that the latch 5 overcomes the pressure of the compression spring, and the inner end of the latch 5 withdraws backward from the limit groove 302. The other hand grasps the roller 305 to turn the bottom wheel 3 outward. After the bottom wheel 3 is in a vertical position, the inner end of the latch 5 is inserted into the limit hole 303 to maintain the rotation angle of the bottom wheel 3, so that it enters the working state. Similarly, operate the other three bottom wheels 3 and switch them all to the working state. Then put the backpack body 1 upright on the ground, open the zipper of the hidden cover 102, and pull out the trolley head 601. At this time, the trolley backpack of the utility model can be used as a trolley case and dragged on the ground.

[0043] In summary, the utility model trolley backpack, by setting the pull rod 6 in the back side wall interlayer of the backpack body 1, the pull rod 6 is hidden and stored, and it does not get in the way when the backpack is used normally; the bottom wheel 3 is hinged to one end of the bottom wheel groove 201 through the pin 4, and is hidden and stored when lying flat, and can be used normally as the roller of the trolley case when standing. The hidden bottom wheel 3 makes the roller 305, which is most easily dirty, hidden in the bottom wheel groove 201, avoiding contact with the user's clothes. The utility model trolley backpack adopts a hidden pull rod and a foldable bottom wheel, which is easy to carry with the bag after being folded, and will not dirty the user's clothes. In addition, by setting the pull rod 6 as a telescopic rod along the vertical direction, after opening the hidden cover 102, pulling the pull rod head 601 can achieve rapid switching. Through the setting of the latch 5, the angle of rotation of the bottom wheel 3 around the pin 4 can be locked, that is, the collection state and working state of the bottom wheel 3 can be switched. By adding a compression spring and a toggle head 501, the compression spring resets the latch 5 toward the bottom wheel 3, reducing the risk of loosening. The toggle head 501 facilitates the user to toggle the latch 5 with his fingers, so that the inner end of the latch 5 is disengaged from the top side plate of the bottom wheel 3, which is convenient for switching between the storage state and the working state. By reasonably setting the height of the top side plate of the bottom wheel 3 so that it protrudes from the bottom surface of the bottom shell 2, when the backpack of the utility model is used as an ordinary backpack, the bottom surface of the backpack can be directly placed on the bottom surface, and the top of the wheel 3 plays a supporting role. By setting the bottom wheel 3 as a universal wheel, it can be flexibly turned.

[0044] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0045] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A trolley backpack, characterized in that: The backpack comprises a main body (1), a bottom shell (2), bottom wheels (3) and a pull rod (6); the bottom shell (2) is fixedly connected to the bottom of the main body (1); four corners of the bottom surface of the bottom shell (2) are provided with rectangular bottom wheel grooves (201); the top of the bottom wheel (3) is hinged to one end of the bottom wheel groove (201) through a pin shaft (4); the bottom wheel (3) can lie flat in the bottom wheel groove (201) or can be arranged upright so that the roller (305) protrudes out of the bottom wheel groove (201); an interlayer is provided in the side wall of the main body (1) in contact with the back of the user; the pull rod (6) is provided in the interlayer; and an openable hidden cover (102) is provided on the top of the interlayer.

2. The trolley backpack according to claim 1, characterized in that: The pull rod (6) is a telescopic rod arranged along the vertical direction, and the top of the telescopic rod is a pull rod head (601) that can be pulled outward; the pull rod head (601) is stored directly below the hidden cover (102), and the hidden cover (102) is closed with a zipper.

3. The trolley backpack according to claim 1, characterized in that: The invention also comprises a latch pin (5), wherein the bottom shell (2) is provided with a latch pin groove (202) on the bottom surface of one end of the pin shaft (4), the latch pin (5) is installed in the latch pin groove (202) and is parallel to the axis of the pin shaft (4), and the latch pin (5) is inserted into the inner end of the bottom wheel groove (201) to limit the rotation angle of the bottom wheel (3).

4. The trolley backpack according to claim 3, characterized in that: A limiting groove (302) and a limiting hole (303) are provided on the top side plate of the bottom wheel (3), and the axis lines of the limiting groove (302) and the limiting hole (303) are parallel to the rotating shaft hole (301) for installing the pin shaft (4); the inner end of the latch pin (5) can be inserted into the limiting groove (302) or the limiting hole (303) to limit the rotation angle of the bottom wheel (3).

5. The trolley backpack according to claim 4, characterized in that: The latch (5) further comprises a compression spring and a toggle head (501); the toggle head (501) protrudes outside the latch slot (202) and its root is connected to the side wall of the latch (5); the compression spring is coaxially sleeved on the rear end of the latch (5) and pushes the latch (5) toward the bottom wheel (3).

6. The trolley backpack according to claim 1, characterized in that: A hard plate is provided inside the side wall of the backpack body (1) that contacts the user's back to separate the pull rod (6). The hard plate is made of hard cardboard or plastic.

7. The trolley backpack according to claim 1, characterized in that: The top side plate of the bottom wheel (3) in the stowed state protrudes out of the bottom surface of the bottom shell body (2) to play a supporting role.

8. The trolley backpack according to claim 1, characterized in that: The bottom wheel (3) is a universal wheel, and the bottom of the bottom wheel (3) is connected to the roller shaft of the roller (305) via a rotating shaft (304).

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