Trolley backpack with tightening straps

Abstract

The utility model discloses a trolley backpack with a tightening strap, which relates to the technical field of luggage appliances and comprises a bottom frame, a pulling moving unit and a strap adjusting unit. The pulling moving units are installed on the lower side and the front side of the bottom frame. The strap adjusting unit comprises a mounting box, a winder, an upper winding block, a strap, a locking device, an unlocking button and a fastening rope. The backpack is provided with the reliable strap adjusting unit, and the strap is always in a tightened state through the winder, so that the effect of tightening the strap is achieved, the stability of the backpack is ensured, and the tightness is convenient to adjust; the fastening rope is fastened on the waist, so that the stability of the knapsack during back moving can be further ensured; and the backpack is further provided with a reliable pulling and moving unit, the device can be conveniently pulled and moved, a flexibly-used partition component is arranged, clothes on the back of a user can be prevented from touching rollers and being stained when the user carries the backpack on the back, and the practicability of the backpack is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of luggage and bags, in particular to a trolley backpack with a tightenable strap. Background Art

[0002] Trolley backpacks are one of the most commonly used bags when traveling. They can not only be carried on the back, but can also be easily dragged on flat ground. They are extremely convenient and are particularly suitable for office work, travel, and daily student use. They can significantly reduce the carrying burden and improve travel efficiency.

[0003] The conventional trolley backpack has a strap that is difficult to adjust and lacks a tightening function, and is prone to becoming loose after a period of use, resulting in a lack of stability. Furthermore, since the backpack's wheels become dusty after being pulled on the ground, it is easy for the user's back clothing to become dirty when the backpack is carried, causing inconvenience to the user. Therefore, we propose a trolley backpack with a tightenable strap. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a trolley backpack with a tightenable strap, which has a reliable strap adjustment unit. The retractor keeps the straps in a taut state at all times, thereby having a tightening effect on the straps, ensuring the stability of the backpack when it is worn, and facilitating adjustment of the tightness; and by tying the tightening rope around the waist, the stability of the backpack when it is carried on the back can be further ensured; it also has a reliable pulling and moving unit, which can facilitate the pulling and moving of the device, and has a flexible partition component, which can prevent the clothes on the back of the user from touching the rollers and getting dirty when the user is carrying the backpack, further improving the practicality of the backpack, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a trolley backpack with a tightenable strap, comprising a base frame, a pulling and moving unit, and a strap adjustment unit;

[0006] Base frame: It is an I-shaped structure, and the main package is fixed on the upper side;

[0007] Pulling moving unit: installed on the lower side and front side of the chassis;

[0008] The harness is pivotally connected to the front of the base frame by a spring, and the rear end of the two straps is pivotally connected to the front of the base frame by a spring, and the rear end of the two straps is pivotally connected to the front of the base frame by a spring.

[0009] The base frame and the sleeve constitute the main frame structure of this trolley backpack, and together support the main bag body. The pulling and moving unit can facilitate the pulling and moving of the device, and has a flexible partition component to prevent the clothes on the back from touching the rollers and getting dirty when the user is carrying the backpack; the installation box is used for installing the reel, and the shoulder strap is pulled out from the inside of the reel and passed around from the bottom side of the upper winding block. The coil spring inside the reel can tighten the shoulder strap, so that the shoulder strap is always in a taut state, ensuring the stability of the backpack when carrying it. The locker is used to lock the end of the shoulder strap. When the unlocking button on the side is pressed, the locker can be moved to adjust the tightness of the shoulder strap. By tying the tightening rope around the waist, the stability of the backpack when carried can be further ensured.

[0010] Furthermore, the pulling and moving unit includes a sleeve, a draw rod, a grip, and an elastic back plate. The sleeve is a long, straight, hollow rod-shaped structure. A draw rod is slidably connected to the interior of each sleeve. A limit block is provided at the end of the draw rod located within the sleeve. The upper ends of the two draw rods are fixedly connected to the grip. The front side of the elastic back plate is provided with two left and right slots. The sleeve is inserted into the slots. The rear end of the elastic back plate is fixedly connected to the main bag body. The grip is used for handholding, so that the backpack can be pulled and moved. The sleeve is used for inserting and storing the draw rod. The limit block can prevent the draw rod from separating from the sleeve. The elastic back plate acts as a cushion between the backpack and the user's back, improving the comfort of carrying the backpack.

[0011] Furthermore, the pulling and moving unit also includes rollers and sliding blocks. A roller is mounted at each of the four corners of the I-shaped chassis, and two sliding blocks are mounted on the underside of the chassis' front end. The sliding blocks are wider than the rollers and maintain a sliding connection with the chassis. The rollers allow the trolley backpack to be placed on the ground and pulled. The sliding blocks can be pulled downward and positioned between the rollers and the user's back, preventing clothing on the user's back from contacting the rollers and getting dirty.

[0012] Furthermore, the pulling and moving unit further includes a through slot, a slider, a screwing head, and a clamping block. The front end of the base frame is provided with two vertical through slots on the left and right. A slider is slidably connected to the interior of the through slot, which is fixedly connected to a sliding block. A screwing head is rotatably connected to the interior of the slider. Two clamping blocks are fixedly connected to the upper portion of the through slot. The slider slides up and down within the through slot. When pulling the backpack, the sliding block is slid upward into the interior of the base frame. At this time, the screwing head is rotated to a horizontal position. The clamping block acts as a limiter for the screwing head, thereby locking and securing the sliding block.

[0013] Furthermore, the mounting box further comprises a fixing block and a fastening bolt, wherein the lower end of the mounting box is fixedly connected to a fixing block, and the fixing block is fixedly connected to the sleeve via the fastening bolt. The fastening bolt is used to fix the fixing block to the sleeve, thereby achieving reinforcement of the mounting box.

[0014] Furthermore, a structural connecting rod is included. A transverse structural connecting rod is installed between the left and right sleeves, and both ends of the structural connecting rod are fixedly connected to the inner side of the upper position of the sleeve. The structural connecting rod is used to improve the structural stability between the two sleeves.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the trolley backpack with a retractable strap has the following advantages:

[0016] 1. It has a reliable strap adjustment unit. The retractor keeps the straps in a taut state at all times, thereby tightening the straps and ensuring the stability of the backpack when it is worn. It is also easy to adjust the tightness. And by tying the tie rope around the waist, the stability of the backpack can be further ensured when it is carried on the back.

[0017] 2. It has a reliable pulling and moving unit, which can facilitate the pulling and moving of the device, and has a flexible barrier component to prevent the user's back clothes from touching the rollers and getting dirty when walking on their backs;

[0018] 3. The utility model has a reliable shoulder strap adjustment unit. The retractor keeps the shoulder strap in a taut state at all times, thereby tightening the shoulder strap, ensuring the stability of the backpack when it is worn, and facilitating the adjustment of the tightness. By tying the tightening rope around the waist, the stability of the backpack when it is carried on the back can be further ensured. The utility model also has a reliable pulling and moving unit, which can facilitate the pulling and moving of the device, and has a flexible barrier component, which can prevent the clothes on the back of the user from touching the rollers and getting dirty when the user is carrying the backpack, thereby further improving the practicality of the backpack. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 This is a schematic diagram of the oblique lower side structure of the utility model;

[0021] Figure 3 For this utility model Figure 1 A magnified view of the structure at center A;

[0022] Figure 4 It is a schematic diagram of the rear structure of the utility model.

[0023] In the figure: 1 base frame, 2 main package body, 3 pulling moving unit, 31 sleeve, 32 pulling rod, 33 grip frame, 34 elastic back plate, 35 roller, 36 sliding block, 37 through slot, 38 slider, 39 screw head, 310 card block, 4 strap adjustment unit, 41 installation box, 42 winder, 43 upper winding block, 44 strap, 45 locker, 46 unlocking button, 47 tie rope, 5 fixing block, 6 fastening bolt, 7 structural connecting rod. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-4 , this embodiment provides a technical solution: a trolley backpack with a tightenable strap, comprising a base frame 1, a pulling moving unit 3 and a strap adjustment unit 4;

[0026] The base frame 1 is an I-shaped structure, and the main package body 2 is fixed on the upper side;

[0027] Pulling moving unit 3: installed on the lower side and front side of the base frame 1;

[0028] The shoulder strap adjustment unit 4 includes a mounting box 41, a reel 42, an upper winding block 43, a shoulder strap 44, a locker 45, an unlocking button 46, and a tie rope 47. The pulling moving unit 3 includes two vertical sleeves 31 and an elastic back plate 34. The lower ends of the two sleeves 31 are fixedly connected to the left and right sides of the front end of the chassis 1. The elastic back plate 34 is installed between the main package 2 and the sleeve 31. A square mounting box 41 is fixedly connected to the lower position of the front side of each sleeve 31. The upper side of the front end of the elastic back plate 34 is installed with two upper winding blocks on the left and right sides. 43. A reel 42 is fixedly installed inside the mounting box 41, and a coil spring and a roller assembly are installed inside the reel 42. A strap 44 is led out from the inside of the reel 42, and the strap 44 is passed around the inside of the upper winding block 43 and led downward. The downwardly led end of the strap 44 is fixedly connected to the inside of the locker 45. A slide groove is provided on the inner side of the locker 45. A section of the strap 44 between the reel 42 and the upper winding block 43 is slidably connected to the locker 45 through the slide groove, and a tightening rope 47 is fixedly connected to the adjacent side of the left and right lockers 45.

[0029] The base frame 1 and the sleeve 31 constitute the main frame structure of this trolley backpack, and together support the main bag body 2. The pulling and moving unit 3 can facilitate the pulling and moving of the device, and has a flexible barrier component to prevent the clothes on the back of the user from touching the roller 35 and getting dirty when the user is carrying the backpack; the installation box 41 is used for installing the reel 42, and the shoulder strap 44 is pulled out from the inside of the reel 42 and passed around from the lower side of the upper winding block 43. The coil spring inside the reel 42 can tighten the shoulder strap 44, so that the shoulder strap 44 is always in a taut state, ensuring the stability of the backpack when carrying the backpack. The locker 45 is used to lock the end of the shoulder strap 44. When the unlocking button 46 on the side is pressed, the locker 45 can be moved to adjust the tightness of the shoulder strap 44. By tying the tightening rope 47 around the waist, the stability of the backpack when carried can be further ensured.

[0030] The pulling and moving unit 3 includes a sleeve 31, a draw rod 32, a grip 33, and an elastic back plate 34. The sleeve 31 is a long, straight, hollow rod-shaped structure. A draw rod 32 is slidably connected to the interior of each sleeve 31. The draw rod 32 is provided with a limit block at the end located within the sleeve 31. The upper ends of the two draw rods 32 are fixedly connected to the grip 33. The front side of the elastic back plate 34 has two left and right slots, into which the sleeve 31 is inserted. The rear end of the elastic back plate 34 is fixedly connected to the main bag body 2. The grip 33 is used for holding the hand, so that the backpack can be pulled and moved. The sleeve 31 is used for inserting and storing the draw rod 32. The limit block can prevent the draw rod 32 from separating from the sleeve 31. The elastic back plate 34 acts as a cushion between the backpack and the user's back, improving the comfort of carrying the backpack.

[0031] The pulling and moving unit 3 also includes rollers 35 and sliding blocks 36. A roller 35 is mounted at each of the four corners of the I-shaped chassis 1. Two sliding blocks 36 are mounted on the lower front end of the chassis 1. The sliding blocks 36 are wider than the rollers 35 and maintain a sliding connection with the chassis 1. The rollers 35 allow the trolley backpack to be placed on the ground for rolling. The sliding blocks 36 can be pulled downward and positioned between the rollers 35 and the user's back, preventing clothing on the user's back from contacting the rollers 35 and getting dirty.

[0032] The pulling and moving unit 3 further includes a through slot 37, a slider 38, a screwing head 39, and a clamping block 310. The front end of the base frame 1 is provided with two vertical through slots 37 on the left and right. A slider 38 is slidably connected within the through slot 37, which is fixedly connected to a sliding block 36. A screwing head 39 is rotatably connected within the slider 38, and two clamping blocks 310 are fixedly connected to the upper portion of the through slot 37. The slider 38 slides up and down within the through slot 37. When pulling the backpack, the sliding block 36 is slid upward into the base frame 1. At this time, the screwing head 39 is rotated to a horizontal position, and the clamping block 310 limits the screwing head 39, thereby locking and securing the sliding block 36.

[0033] The mounting box 41 further includes a fixing block 5 and a fastening bolt 6. The lower end of the mounting box 41 is fixedly connected to a fixing block 5, and the fixing block 5 is fixedly connected to the sleeve 31 via the fastening bolt 6. The fastening bolt 6 is used to fix the fixing block 5 to the sleeve 31, thereby reinforcing the mounting box 41.

[0034] The structure also includes a connecting rod 7, a transverse connecting rod 7 is installed between the left and right sleeves 31, and the two ends of the connecting rod 7 are fixedly connected to the inner side of the upper position of the sleeve 31. The connecting rod 7 is used to improve the structural stability between the two sleeves 31.

[0035] The utility model provides a trolley backpack with a tightenable strap. The working principle is as follows: the trolley backpack has a reliable strap adjustment unit 4, and the retractor 42 keeps the strap 44 in a taut state at all times, thereby having a tightening effect on the strap 44, ensuring the stability of the backpack when it is worn, and facilitating the adjustment of the tightness; and by tightening the tightening rope 47 around the waist, the stability of the backpack when it is carried can be further ensured: the base frame 1 and the sleeve 31 constitute the main frame structure of the trolley backpack, and together support the main bag body 2, and the mounting box 4 1 is used to install the reel 42. The shoulder strap 44 is pulled out from the inside of the reel 42 and wrapped around the lower side of the upper winding block 43. The coil spring inside the reel 42 can tighten the shoulder strap 44, so that the shoulder strap 44 is always in a taut state, ensuring the stability of the backpack. The locker 45 is used to lock the end of the shoulder strap 44. When the unlocking button 46 on the side is pressed, the locker 45 can be moved to adjust the tightness of the shoulder strap 44. By fastening the tightening rope 47 around the waist, the stability of the backpack can be further ensured when it is carried on the back. The trolley backpack also has a reliable pulling and moving unit 3, which can facilitate the pulling and moving of the device, and has a flexible barrier component to prevent the user's back clothes from touching the roller 35 and getting dirty when walking on the back, further improving the practicality of the backpack: the grip 33 is used for holding the hand, so that the backpack can be pulled to move, the sleeve 31 is used for inserting the drawer rod 32, and the drawer rod 32 can be stored. The limit block can prevent the drawer rod 32 from separating from the sleeve 31, and the elastic back plate 34 is between the backpack and the user's back. It provides cushioning and protection, improving comfort when used on the back. The roller 35 allows the trolley backpack to be placed on the ground for pulling. The sliding block 36 can be pulled downward and positioned between the roller 35 and the user's back, preventing clothing on the user's back from contacting the roller 35 and getting dirty. The slider 38 slides up and down within the through slot 37. When the backpack is pulled, the sliding block 36 slides upward into the base frame 1. At this time, the screw head 39 is rotated to a horizontal position, and the clamping block 310 limits the screw head 39, thereby locking and securing the sliding block 36. In addition, the fastening bolt 6 is used to secure the fixing block 5 to the sleeve 31, thereby reinforcing the mounting box 41. The structural connecting rod 7 is used to improve the structural stability between the two sleeves 31.

[0036] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A trolley backpack with a retractable strap, characterized in that: It comprises a base frame (1), a pulling and moving unit (3) and a shoulder strap adjustment unit (4); The base frame (1) is an I-shaped structure, and the main package body (2) is fixedly mounted on the upper side; Pulling moving unit (3): installed on the lower side and front side of the base frame (1); The shoulder strap adjustment unit (4) comprises a mounting box (41), a reel (42), an upper winding block (43), a shoulder strap (44), a locker (45), an unlocking button (46) and a tie rope (47). The pulling moving unit (3) comprises two vertical sleeves (31) and an elastic back plate (34). The lower ends of the two sleeves (31) are fixedly connected to the left and right sides of the front end of the chassis (1). An elastic back plate (34) is installed between the main package (2) and the sleeves (31). A square mounting box (41) is fixedly connected to the lower position of the front side of each sleeve (31). The upper front side of the elastic back plate (34) is installed with two upper left and right buttons. A winding block (43) and a reel (42) are fixedly installed inside the mounting box (41). A coil spring and a roller assembly are installed inside the reel (42). A strap (44) is led out from the inside of the reel (42). The strap (44) is passed around the inside of the upper winding block (43) and led out downward. The end of the strap (44) led out downward is fixedly connected to the inside of the locker (45). A slide groove is provided on the inner side of the locker (45). A section of the strap (44) between the reel (42) and the upper winding block (43) is slidably connected to the locker (45) through the slide groove. A tightening rope (47) is fixedly connected to the adjacent side of the left and right lockers (45).

2. The trolley backpack with a retractable strap according to claim 1, characterized in that: The pulling and moving unit (3) comprises a sleeve (31), a pull rod (32), a grip (33) and an elastic back plate (34). The sleeve (31) is a long straight hollow rod-shaped structure. The interior of each sleeve (31) is slidably connected to a pull rod (32). The pull rod (32) is provided with a limit block at the end inside the sleeve (31). The upper ends of the two pull rods (32) are fixedly connected to the grip (33). The front side of the elastic back plate (34) is provided with two left and right slots. The sleeve (31) is clamped inside the slot. The rear end of the elastic back plate (34) is fixedly connected to the main package (2).

3. The trolley backpack with a retractable strap according to claim 1, characterized in that: The pulling and moving unit (3) further comprises a roller (35) and a sliding block (36). A roller (35) is installed at each of the four corners of the I-shaped base frame (1). Two left and right sliding blocks (36) are installed at the lower front end of the base frame (1). The sliding blocks (36) are wider than the roller (35) and maintain a sliding connection with the base frame (1).

4. The trolley backpack with a retractable strap according to claim 3, characterized in that: The pulling and moving unit (3) further comprises a through slot (37), a slider (38), a screwing head (39) and a clamping block (310). The front end of the base frame (1) is provided with two vertical through slots (37) on the left and right. A slider (38) is slidably connected to the interior of the through slot (37). The slider (38) is fixedly connected to the sliding block (36). A screwing head (39) is rotatably connected to the interior of the slider (38). Two clamping blocks (310) on the left and right are fixedly connected to the upper position of the through slot (37).

5. The trolley backpack with a retractable strap according to claim 1, characterized in that: It also includes a fixing block (5) and a fastening bolt (6). The lower end of the mounting box (41) is fixedly connected to a fixing block (5), and the fixing block (5) is fixedly connected to the sleeve (31) via the fastening bolt (6).

6. The trolley backpack with a retractable strap according to claim 1, characterized in that: It also includes a structural connecting rod (7), a transverse structural connecting rod (7) is installed between the left and right sleeves (31), and both ends of the structural connecting rod (7) are fixedly connected to the inner side of the sleeve (31) at the upper position.

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