Detachable student bag pull rod

Abstract

The utility model relates to a detachable student bag draw bar, which belongs to the technical field of detachable student bag draw bars and comprises a schoolbag, two shoulder straps are fixed on the front side of the schoolbag, and a draw bar mechanism is arranged on the schoolbag. The pull rod mechanism comprises two fixing belts fixed to the bottom face of the schoolbag, bottom supporting rods are slidably connected to the top faces of the fixing belts, cross rods are installed at the left ends and the right ends of the two bottom supporting rods correspondingly, two telescopic cylinders are installed on the top faces of the cross rods, fixing assemblies are arranged on the two cross rods, telescopic rods are slidably connected into the telescopic cylinders, and the telescopic rods are connected with the telescopic rods. The left side and the right side of the schoolbag are each fixedly provided with two fixing rings allowing the telescopic cylinders to penetrate through, a connecting rod is fixed between the two telescopic rods which are opposite in the front-back direction, and a grab rail is fixed between the two connecting rods. According to the detachable student bag pull rod, the pull rod mechanism is arranged on the side edge of the schoolbag, so that the pull rod mechanism cannot be in contact with the back of a student when the schoolbag is carried, and discomfort cannot be caused.

Description

Technical Field

[0001] The utility model relates to the technical field of detachable student bag pull rods, in particular to a detachable student bag pull rod. Background Technique

[0002] A schoolbag refers to a bag made of cloth, leather, etc., which students use to carry textbooks and stationery. A backpack is a widely used schoolbag. The most obvious feature of this type of schoolbag is that there are two straps on the back for buckling on the shoulders. To reduce the burden on students, some backpacks are also equipped with a pull rod structure to become a rolling backpack.

[0003] For example, Chinese Patent (Publication No.: CN210329742U) discloses a rolling backpack for students, including components such as a support plate, a telescopic pull rod, a cross bar, a fastening bolt, a fixing plate, a connecting lifting rod, and a schoolbag. When in use, when the schoolbag needs to be carried by hand, tear off the first magic tape female tape connected to the second magic tape male tape, and then paste and fix the second magic tape female tape at the bottom of the schoolbag on the second magic tape male tape on the support plate. Pull the elastic cord to paste the first magic tape female tape on the third magic tape male tape, align the third magic tape female tape of the fixing plate with the first magic tape male tape on the schoolbag, and then lock the fastening bolt to fix the schoolbag in three dimensions to prevent the schoolbag from shifting. Then, adjust the length of the telescopic pull rod to pull the whole device through the connecting lifting rod to complete the function of the rolling backpack.

[0004] However, the above-mentioned retrieved patent still has some deficiencies. Its telescopic pull rod is designed on one side of the schoolbag shoulder strap, resulting in the telescopic pull rod contacting the student's back when the schoolbag is carried on the back, causing discomfort and inconvenience in use. Therefore, a detachable student bag pull rod is proposed to solve the above problems. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a detachable student bag pull rod, which has the advantages of convenient use and does not affect students' backpacking, and solves the problem that the telescopic pull rod of the device disclosed in the above-mentioned retrieved patent is prone to cause discomfort and affect students' backpacking.

[0006] To achieve the above object, the utility model provides the following technical solution: A detachable student bag pull rod, including a schoolbag, two shoulder straps are fixed on the front of the schoolbag, and a pull rod mechanism is provided on the schoolbag;

[0007] The pulling rod mechanism includes two fixing straps fixed to the bottom surface of the school bag, the top surface of the fixing straps is slidably connected with a bottom support rod, the left and right ends of the two bottom support rods are equipped with cross bars, the top surface of the cross bars is equipped with two telescopic cylinders, the two cross bars are provided with fixing components for fixing the bottom support rods and the telescopic cylinders, the telescopic rods are slidably connected in the telescopic cylinders, two fixing rings for the telescopic cylinders to pass through are fixed on the left and right sides of the school bag, a connecting rod is fixed between the two telescopic rods facing each other front and back, a handrail rod is fixed between the two connecting rods, and two universal wheels are installed on the bottom surface of the cross bar through a mounting seat.

[0008] Furthermore, the fixing assembly includes screws fixed at the left and right ends of the bottom support rod, the end of the screw facing away from the bottom support rod is threadedly connected with a threaded block, two through holes for the screws to pass through are provided on the left side of the cross bar, a plug-in block is fixed to the bottom end of the telescopic cylinder, a limiting hole is provided on the right side of the plug-in block, and two plug-in grooves are provided on the top surface of the cross bar.

[0009] Furthermore, a ring structure is formed between the upper and lower sides of the shoulder strap and the backpack fixing part for the arms and shoulders to pass through, and the two shoulder straps are distributed on the left and right.

[0010] Furthermore, a ring structure is formed between the front and rear sides of the fixing belt and the backpack fixing member for the bottom support rod to pass horizontally, and the two fixing belts are distributed front and back.

[0011] Furthermore, the telescopic cylinder is used for the telescopic rod to slide up and down inside it, and a plurality of adjustment holes equidistantly distributed up and down are opened on the front of the telescopic rod, and the opposite sides of the two telescopic cylinders facing each other are threadedly connected with bolts having one end extending into the inside of the adjustment hole.

[0012] Furthermore, an anti-slip sleeve is fixed on the outer peripheral wall of the handrail rod, and the two fixing rings on the same side are front and back opposite to each other, and the fixing ring is clearance-matched with the telescopic tube.

[0013] Furthermore, the through hole is communicated with the plug-in slot, the screw rod horizontally penetrates the limiting hole and the through hole, and the plug-in block is clearance-matched with the plug-in slot.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] 1. The detachable student bag pull rod is used to store student stationery through the school bag. The school bag can be supported by the bottom support rod, cross rod and other structures provided by the pull rod mechanism, and the school bag can be dragged and moved by the provided telescopic cylinder, handrail rod, universal wheel and other structures. In addition, the school bag can be carried on the back by the provided shoulder strap. Since the pull rod mechanism is provided on the side of the school bag, the pull rod mechanism will not contact the student's back when the school bag is carried, thereby not causing discomfort. The school bag has better practicality and is more convenient for promotion and use.

[0016] 2. The detachable student bag pull rod, the bottom support rod and the telescopic cylinder of the pull rod mechanism are both connected and fixed to the cross bar through the fixing components. When the schoolbag needs to be cleaned, the fixing components can be operated to disassemble the pull rod mechanism, so that the pull rod mechanism is separated from the schoolbag, which provides convenience for cleaning the schoolbag and further improves the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front view schematic diagram of the present utility model;

[0018] Figure 2 is a three-dimensional schematic diagram of a partial structure of the pull rod mechanism of the present utility model;

[0019] Figure 3 is a front view structural schematic diagram of the bolt of the present utility model;

[0020] Figure 4 is a front view schematic diagram of the fixing component of the present utility model.

[0021] In the figure: 1 schoolbag, 2 shoulder straps, 301 fixing strap, 302 bottom support rod, 303 cross bar, 304 telescopic cylinder, 305 telescopic rod, 306 connecting rod, 307 handrail rod, 308 fixing ring, 309 adjustment hole, 310 bolt, 311 universal wheel, 401 screw rod, 402 threaded block, 403 through hole, 404 insertion block, 405 limit hole, 406 insertion slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figure 1 , a detachable student bag pull rod in this embodiment includes a schoolbag 1. Two shoulder straps 2 are fixed on the front of the schoolbag 1. A pull rod mechanism is provided on the schoolbag 1. The upper and lower sides of the shoulder straps 2 are fixed to the schoolbag 1, and a circular structure is formed therebetween for the arm and shoulder to pass through. The two shoulder straps 2 are distributed left and right. The schoolbag 1 is used to store students' stationery supplies. The schoolbag 1 can be dragged to move through the pull rod mechanism, thereby reducing the burden on the students. In addition, the schoolbag 1 can also be carried on the back through the provided shoulder straps 2. Since the pull rod mechanism is provided on the side of the schoolbag 1, the pull rod mechanism will not contact the student's back when carrying the schoolbag 1, and thus will not cause discomfort, with better practicability and being more convenient for popularization and use.

[0024] Please refer to Figures 1 to 3 As shown in Figures 1 to 3 , the trolley mechanism includes two fixing straps 301 fixed to the bottom surface of the schoolbag 1. A bottom support rod 302 is slidably connected to the top surface of the fixing strap 301. Cross bars 303 are installed at the left and right ends of the two bottom support rods 302. Two telescopic cylinders 304 are installed on the top surface of the cross bars 303. A fixing component for fixing the bottom support rod 302 and the telescopic cylinder 304 is provided on the two cross bars 303. A telescopic rod 305 is slidably connected inside the telescopic cylinder 304. Two fixing rings 308 through which the telescopic cylinder 304 passes are fixed to both the left and right sides of the schoolbag 1. When in use, the schoolbag 1 is used to store students' stationery. The bottom support rod 302, the cross bar 303, and the telescopic cylinder 304 of the trolley mechanism form a U-shaped frame structure. And the schoolbag 1 is fixed to the U-shaped frame through the provided fixing strap 301 and fixing ring 308, which facilitates the trolley mechanism to drag the schoolbag 1 to move and increases the stability of the fixation between the schoolbag 1 and the trolley mechanism. A connecting rod 306 is fixed between the two front and rear opposite telescopic rods 305. A handrail rod 307 is fixed between the two connecting rods 306. Two universal wheels 311 are installed on the bottom surface of the cross bar 303 through mounting seats. The telescopic cylinder 304 is used to allow the telescopic rod 305 to slide up and down inside it. A plurality of adjusting holes 309 are provided at equal intervals up and down on the front surface of the telescopic rod 305. One end of a bolt 310 extending into the adjusting hole 309 is threadedly connected to the opposite sides of the two front and rear opposite telescopic cylinders 304. Further, a telescopic rod 305 is slidably connected inside the telescopic cylinder 304. By sliding the telescopic rod 305 up and down and then fixing the telescopic rod 305 through the cooperation of the bolt 310 and the adjusting hole 309, the height of the handrail rod 307 can be adjusted. By cooperating the handrail rod 307 with the universal wheels 311, the U-shaped frame and the schoolbag 1 can be dragged to move. In addition, after the telescopic rod 305 is retracted, the schoolbag 1 can be directly carried on the back using the shoulder strap 2. The telescopic rod 305 and the telescopic cylinder 304 are both arranged on the side of the schoolbag 1 and will not cause discomfort to the human body.

[0025] The front and rear sides of the fixing strap 301 are fixed to the schoolbag 1, and a ring structure is formed therebetween for the bottom support rod 302 to horizontally pass through. The two fixing straps 301 are arranged front and rear. An anti-slip sleeve is fixed on the outer peripheral wall of the handrail rod 307. The two fixing rings 308 on the same side are opposite front and rear. The fixing ring 308 and the telescopic cylinder 304 are in clearance fit.

[0026] Please refer to Figures 2 to 4In this embodiment, the fixing assembly includes screw rods 401 fixed at the left and right ends of the bottom supporting rod 302, and the end of the screw rod 401 away from the bottom supporting rod 302 is threadedly connected with a threaded block 402. The left side of the cross bar 303 is provided with two through holes 403 for the screw rod 401 to pass through, and the bottom end of the telescopic cylinder 304 is fixed with a plug-in block 404. The right side of the plug-in block 404 is provided with a limiting hole 405. When it is necessary to disassemble the pull rod mechanism to clean the school bag 1, all the items inside the school bag 1 are taken out, and the threaded block 402 is rotated to disengage it from the screw rod 401. Since the school bag 1 is made of soft cloth or leather, the cross bar 303 can be moved in the horizontal direction at this time, so that the screw rod 401 is disengaged from the through hole 403 and the limiting hole 405. , two plug-in grooves 406 are provided on the top surface of the cross bar 303, the through hole 403 is connected with the plug-in groove 406, the screw 401 horizontally penetrates the limit hole 405 and the through hole 403, and the plug-in block 404 is clearance-matched with the plug-in groove 406. Further, the telescopic cylinder 304 can be moved upward to make the plug-in block 404 disengage from the plug-in groove 406, and at the same time, the telescopic cylinder 304 is pulled out of the fixing ring 308 to complete the disassembly of the telescopic rod 305. Finally, the bottom support rod 302 is moved horizontally to make it disengage from the fixing belt 301 to complete the disassembly of the entire pull rod mechanism. After the school bag 1 is cleaned, the above operation is reversed, and the bottom support rod 302 and the telescopic cylinder 304 are fixed on the cross bar 303 by the threaded block 402 and the screw 401.

[0027] The working principle of the above embodiment is:

[0028] (1) When in use, the school bag 1 is used to store students' stationery. The bottom support rod 302, the cross rod 303, and the telescopic cylinder 304 provided by the pull rod mechanism form a U-shaped frame structure, and the school bag 1 is fixed to the U-shaped frame by the provided fixing belt 301 and the fixing ring 308. Furthermore, the telescopic rod 305 is slidably connected in the telescopic cylinder 304. The telescopic rod 305 is slid up and down, and then the telescopic rod 305 is fixed by the bolt 310 and the adjustment hole 309 to achieve the effect of adjusting the height of the handrail 307. Furthermore, the U-shaped frame and the school bag 1 can be dragged and moved by the handrail 307 and the universal wheel 311. In addition, the school bag 1 can be directly carried by the shoulder strap 2 after the telescopic rod 305 is stored. The telescopic rod 305 and the telescopic cylinder 304 are both arranged on the side of the school bag 1, which will not cause discomfort to the human body.

[0029] (2)When it is necessary to disassemble the pull rod mechanism to clean the schoolbag 1, take out all the items inside the schoolbag 1, and rotate the threaded block 402 to disengage it from the screw rod 401. Since the schoolbag 1 is made of soft fabric or leather, at this time, the cross bar 303 can be moved horizontally, so that the screw rod 401 disengages from the through hole 403 and the limit hole 405. Further, the telescopic cylinder 304 can be moved upward, so that the insertion block 404 disengages from the insertion slot 406, and at the same time, the telescopic cylinder 304 is pulled out of the fixing ring 308, completing the disassembly of the telescopic rod 305. Finally, move the bottom support rod 302 horizontally to disengage it from the fixing belt 301 to complete the disassembly of the entire pull rod mechanism. After the schoolbag 1 is cleaned, reverse the above operations, and fix the bottom support rod 302 and the telescopic cylinder 304 on the cross bar 303 by means of the threaded block 402 cooperating with the screw rod 401.

[0030] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable student bag pull rod, comprising a school bag (1), characterized in that: Two shoulder straps (2) are fixed to the front of the school bag (1), and a pull rod mechanism is provided on the school bag (1); The pull rod mechanism comprises two fixing belts (301) fixed to the bottom surface of the backpack (1); a bottom support rod (302) is slidably connected to the top surface of the fixing belt (301); left and right ends of the two bottom support rods (302) are both mounted with cross bars (303); two telescopic cylinders (304) are mounted on the top surface of the cross bars (303); fixing components for fixing the bottom support rods (302) and the telescopic cylinders (304) are provided on the two cross bars (303); a telescopic rod (305) is slidably connected inside the telescopic cylinder (304); two fixing rings (308) for the telescopic cylinder (304) to pass through are fixed to the left and right sides of the backpack (1); a connecting rod (306) is fixed between the two telescopic rods (305) facing each other in front and back; a handrail rod (307) is fixed between the two connecting rods (306); and two universal wheels (311) are mounted on the bottom surface of the cross bar (303) via a mounting seat.

2. The detachable student bag pull rod according to claim 1, characterized in that: The fixing assembly comprises screw rods (401) fixed to the left and right ends of the bottom supporting rod (302); one end of the screw rod (401) facing away from the bottom supporting rod (302) is threadedly connected to a threaded block (402); two through holes (403) for the screw rod (401) to pass through are provided on the left side of the cross rod (303); a plug-in block (404) is fixed to the bottom end of the telescopic cylinder (304); a limiting hole (405) is provided on the right side of the plug-in block (404); and two plug-in grooves (406) are provided on the top surface of the cross rod (303).

3. The detachable student bag pull rod according to claim 1, characterized in that: The upper and lower sides of the shoulder strap (2) are fixed to the school bag (1) to form a ring structure for the arms and shoulders to pass through, and the two shoulder straps (2) are distributed on the left and right.

4. The detachable student bag pull rod according to claim 1, characterized in that: The front and rear sides of the fixing belt (301) and the backpack (1) are fixed to form a ring structure for the bottom support rod (302) to pass through horizontally, and the two fixing belts (301) are distributed front and back.

5. The detachable student bag pull rod according to claim 1, characterized in that: The telescopic cylinder (304) is used for the telescopic rod (305) to slide up and down inside the telescopic cylinder. A plurality of adjustment holes (309) equidistantly distributed up and down are provided on the front side of the telescopic rod (305). The opposite sides of the two telescopic cylinders (304) facing each other front and back are both threadedly connected to bolts (310) having one end extending into the inside of the adjustment hole (309).

6. The detachable student bag pull rod according to claim 1, characterized in that: An anti-slip sleeve is fixed on the outer peripheral wall of the handrail rod (307), and two fixing rings (308) on the same side are opposed to each other in a front-to-back manner, and the fixing rings (308) are clearance-matched with the telescopic cylinder (304).

7. The detachable student bag pull rod according to claim 2, characterized in that: The through hole (403) is communicated with the plug-in slot (406), the screw rod (401) horizontally penetrates the limiting hole (405) and the through hole (403), and the plug-in block (404) is clearance-matched with the plug-in slot (406).

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