Trundle of trolley backpack

Abstract

The trundle comprises a supporting shell, mounting strips are fixedly connected to the edges of the supporting shell respectively, a supporting frame is fixedly connected to the middle of the supporting shell, a sliding opening is formed in the middle of the supporting frame, and a positioning bolt is arranged in the sliding opening in a sliding mode. One end of the positioning bolt is in threaded connection with the supporting shell, the positioning bolt is movably sleeved with the supporting cylinder, the two sides of the supporting cylinder are sleeved with bearings respectively, the bearings are fixedly sleeved with the rolling wheels respectively, and the rolling wheels are movably arranged in the supporting shell and located between the supporting shell and the supporting frame. And through the movable arrangement of the rollers, when a user needs to lift or carry the knapsack, the rollers can be conveniently retracted into the supporting shell, the situation that the body or clothes of the user are stained with the rollers stained with dirt is avoided, and the knapsack is convenient to use in different scenes.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of trundle, concretely to a trundle of trolley backpack. BACKGROUND

[0002] In daily production and life, the use of backpack is more common, used for containing articles, providing convenience for production or life, in order to adapt to different topography, the trolley backpack appears on the market now, the backpack is combined with the pull rod, the rolling wheel is arranged at the bottom of the backpack, the backpack is moved by the pull rod, instead of directly carrying the backpack.

[0003] The existing backpack such as the Chinese patent with the publication number CN202335507U discloses a travel backpack with heat insulation and heat preservation effect, which comprises a backpack body with a backpack cover and a shoulder strap connected to the backpack body, a backpack liner with a heat insulation and heat preservation material in a sandwich is arranged in the backpack body, a bracket with a pull rod is sleeved on the back of the backpack body, the bottom of the backpack body and the bottom plate surface of the bracket are provided with magic tape adhered to each other, the bottom plate side of the bracket connected with the pull rod is provided with a trundle, and the bottom plate of the bracket is provided with two supporting feet, and the back of the backpack body is also provided with a back cushion.

[0004] Although the trundle of the trolley backpack is convenient to move, the outer periphery of the trundle wheel body is stained with dirt after walking on the ground, and when the backpack needs to be carried or worn, the wheel body stained with dirt will inevitably easily stain the user or clothes, which often makes the user very uncomfortable and embarrassed, therefore, the trundle of the trolley backpack is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a trundle of trolley backpack to solve the problems in the background art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a trundle of trolley backpack, which comprises a supporting shell, the edges of the supporting shell are respectively fixedly connected with mounting strips, the middle part of the supporting shell is fixedly connected with a supporting frame, the middle part of the supporting frame is provided with a sliding opening, a positioning bolt is slidably arranged in the sliding opening, one end of the positioning bolt is threadedly connected with the supporting shell, the positioning bolt is movably sleeved in a supporting cylinder, bearings are respectively sleeved on the two sides of the supporting cylinder, the bearings are respectively fixedly sleeved with rolling wheels, the rolling wheels are movably arranged in the supporting shell and located between the supporting shell and the supporting frame.

[0007] Preferably, a plurality of mounting holes are formed in the mounting strips.

[0008] Preferably, the internal volume of the supporting shell is greater than the volume of the rolling wheel.

[0009] Preferably, the inner wall of the support shell is provided with a guide sliding groove, both ends of the guide sliding groove are concavely provided with positioning screw holes, and the positioning screw holes are in threaded connection with the end portions of the positioning bolts.

[0010] Preferably, one side of the sliding opening is provided with an anti-slip opening.

[0011] Preferably, one end of the support cylinder is slidably connected with the guide sliding groove, and the other end of the support cylinder is slidably connected with the anti-slip opening.

[0012] Preferably, the support cylinder is coaxially provided with a movable ring opening at one end, and the thread outer diameter of the positioning bolt is less than or equal to the inner diameter of the movable ring opening.

[0013] Preferably, one side of the positioning bolt is in a cylindrical structure and the cylindrical structure is slidably connected with the support cylinder.

[0014] Preferably, the opening width of the sliding opening is equal to the outer diameter of the cylindrical structure of the positioning bolt.

[0015] Preferably, the roller is provided with a rubber ring.

[0016] Compared with the prior art, the beneficial effects of the utility model are that: through the movable setting of the roller, when the user needs to carry or wear the backpack, the roller can be retracted into the support shell, so as to avoid the dirty roller from staining the user or clothes, and the use in different scenes is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 It is a sectional structural schematic view of the utility model.

[0019] In the drawing: mounting strip 1, mounting hole 11, support shell 2, guide sliding groove 21, positioning screw hole 22, support frame 3, anti-slip opening 31, sliding opening 4, positioning bolt 5, roller 6, rubber ring 61, support cylinder 7, movable ring opening 71, bearing 8. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0021] Embodiment 1

[0022] Reference Figure 1、 2 For the first embodiment of the utility model, this embodiment provides a trundle of a drawstring bag, including support shell 2, the edge of support shell 2 is fixedly connected with mounting strip 1 respectively, the middle part of support shell 2 is fixedly connected with support frame 3, the middle part of support frame 3 is provided with sliding port 4, positioning bolt 5 is slidably arranged in sliding port 4, one end of positioning bolt 5 is threadedly connected with support shell 2, positioning bolt 5 movably sleeves in support cylinder 7, the both sides of support cylinder 7 are sleeved with bearing 8 respectively, bearing 8 is fixedly sleeved with roller 6 respectively, roller 6 is movably arranged in support shell 2 and roller 6 is located between support shell 2 and support frame 3.

[0023] Mounting strip 1 is fixedly installed at the both sides of the bottom of the drawstring bag by cooperation with screw, support shell 2 is the trundle wheel shell commonly used in the prior art of drawstring bag, the improvement point is that the internal containing space is increased, the space containing the wheel body is increased, and then the roller 6 can be completely collected in the support shell 2, when the trundle needs to be moved, the positioning bolt 5 is threadedly connected with the bottommost positioning hole 22, and then the roller 6 is stretched out from the space in the support shell 2, so that the roller 6 can contact the ground, which is convenient to use, when the drawstring bag needs to be carried by hand or worn on the back, the positioning bolt 5 is manually loosened, the threaded structure of the positioning bolt 5 is collected into the movable ring port 71, so that the threaded structure of the positioning bolt 5 is separated from the positioning hole 22, then the positioning bolt 5 is moved, the sleeved support cylinder 7 is moved in the guide sliding groove 21 and the anti-slip port 31 respectively, and then the roller 6 is collected into the support shell 2, at the same time, the positioning bolt 5 is coincided with the positioning hole 22 located at the top, then the positioning bolt 5 is tightened, the positioning bolt 5 is threadedly connected with the positioning hole 22, the position of the roller 6 is limited and fixed, so that the roller stained with dirt does not stain the user or clothes, and the use in different scenes is facilitated.

[0024] Embodiment 2

[0025] Refer to Figures 1-2 For the second embodiment of the utility model, based on the previous embodiment, specifically, a plurality of mounting holes 11 are formed in the mounting strip 1, and the mounting strip 1 is fixedly installed at the both sides of the bottom of the drawstring bag by cooperation with screws.

[0026] Specifically, the internal volume of the support shell 2 is greater than the volume of the roller 6, the support shell 2 is the trundle wheel shell commonly used in the prior art of drawstring bag, the improvement point is that the internal containing space is increased, the space containing the wheel body is increased, and then the roller 6 can be completely collected in the support shell 2.

[0027] Specifically, the inner wall of the support shell 2 is provided with a guide sliding groove 21, the both ends of the guide sliding groove 21 are respectively concavely provided with positioning holes 22, and the positioning holes 22 are threadedly connected with the end portions of the positioning bolts 5.

[0028] Further, one side of the sliding opening 4 is provided with an anti-slip opening 31.

[0029] Further, one end of the guiding sliding groove 21 is slidably connected with the support cylinder 7, and the other end of the anti-slip opening 31 is slidably connected with the support cylinder 7.

[0030] After the positioning bolt 5 is loosened, the positioning bolt 5 is moved, and the support cylinder 7 sleeved with the positioning bolt 5 is moved in the guiding sliding groove 21 and the anti-slip opening 31, thereby driving the roller 6 to be retracted or moved out of the support shell 2.

[0031] Specifically, one end of the support cylinder 7 is coaxially provided with a movable ring opening 71, the outer diameter of the thread of the positioning bolt 5 is less than or equal to the inner diameter of the movable ring opening 71, the positioning bolt 5 is manually loosened, the threaded structure of the positioning bolt 5 is retracted into the movable ring opening 71, and the threaded structure of the positioning bolt 5 is separated from the positioning bolt hole 22.

[0032] Further, one side of the positioning bolt 5 is a cylindrical structure and is slidably sleeved with the support cylinder 7, and the cylindrical structure facilitates the rotation operation of the positioning bolt 5.

[0033] Further, the opening width of the sliding opening 4 is equal to the outer diameter of the cylindrical structure of the positioning bolt 5, which facilitates the movement of the positioning bolt 5 in the sliding opening 4.

[0034] Specifically, the roller 6 is externally sleeved with a rubber ring 61, and the rubber ring 61 improves the wear resistance of the roller 6 during movement.

[0035] Embodiment 3

[0036] Reference Figures 1-2For the third embodiment of the utility model, the embodiment is based on the above two embodiments, when in use, the installation strip 1 is fixedly installed at both sides of the bottom of the drawstring backpack through cooperation of screws, the support shell 2 is a common caster wheel shell of the drawstring backpack in the prior art, the improvement point is that the internal containing space is increased, the space containing the wheel body is increased, and thus the caster wheel 6 can be completely stored in the support shell 2, when the caster wheel needs to be moved, the positioning bolt 5 is screwed with the positioning screw hole 22 at the bottom, and thus the caster wheel 6 is extended from the space in the support shell 2, so that the caster wheel 6 can contact the ground, and the use is convenient, when the drawstring backpack needs to be carried by hand or worn on the back, the positioning bolt 5 is manually loosened, the threaded structure of the positioning bolt 5 is stored in the movable ring mouth 71, so that the threaded structure of the positioning bolt 5 is separated from the positioning screw hole 22, then the positioning bolt 5 is moved, the sleeved support cylinder 7 is moved in the guide sliding groove 21 and the anti-slip mouth 31 respectively, and thus the caster wheel 6 is stored in the support shell 2, at the same time, the positioning bolt 5 is coincided with the positioning screw hole 22 at the top, then the positioning bolt 5 is tightened, the positioning bolt 5 is screwed with the positioning screw hole 22, the position of the caster wheel 6 is limited and fixed, and the caster wheel stained with dirt is prevented from staining the user or clothes, and the use in different scenes is convenient.

[0037] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A trolley wheel for a trolley duffel bag comprising a support housing (2), characterized in that: The edge of the support shell (2) is respectively fixedly connected with the mounting strip (1), the middle part of the support shell (2) is fixedly connected with the support frame (3), the middle part of the support frame (3) is provided with the sliding port (4), the sliding port (4) is slidably provided with the positioning bolt (5), one end of the positioning bolt (5) is threadedly connected with the support shell (2), the positioning bolt (5) is movably sleeved in the support cylinder (7), the both sides of the support cylinder (7) are respectively sleeved with the bearing (8), the bearing (8) is respectively fixedly sleeved with the roller (6), the roller (6) is movably arranged in the support shell (2) and the roller (6) is located between the support shell (2) and the support frame (3).

2. The caster for a wheeled duffel bag of claim 1, wherein: The mounting strip (1) is provided with a plurality of mounting holes (11).

3. The caster for a wheeled duffel bag of claim 1, wherein: The internal volume of the support shell (2) is greater than the volume of the roller (6).

4. The caster for a wheeled duffel bag of claim 1, wherein: The inner wall of the support shell (2) is provided with the guide sliding groove (21), the both ends of the guide sliding groove (21) are respectively concavely provided with the positioning screw hole (22), and the positioning screw hole (22) is threadedly connected with the end of the positioning bolt (5).

5. A glider wheel for a trolley pack according to claim 4, wherein: One side of the sliding port (4) is provided with the anti-slip port (31).

6. A glider wheel for a trolley pack according to claim 5 wherein: One end of the support cylinder (7) is slidably clamped in the guide sliding groove (21), and the other end of the support cylinder (7) is slidably clamped in the anti-slip port (31).

7. The caster for a wheeled duffel bag of claim 1, wherein: One end of the support cylinder (7) is coaxially provided with the movable ring port (71), and the thread outer diameter of the positioning bolt (5) is less than or equal to the inner diameter of the movable ring port (71).

8. A glider wheel for a trolley pack according to claim 7, wherein: One side of the positioning bolt (5) is a cylindrical structure, and the cylindrical structure is slidably sleeved with the support cylinder (7).

9. A glider wheel for a trolley pack according to claim 8, wherein: The opening width of the sliding port (4) is equal to the outer diameter of the cylindrical structure of the positioning bolt (5).

10. The caster for a wheeled duffel bag of claim 1, wherein: The roller (6) is externally sleeved with the rubber ring (61).

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