Movable cart with fixing mechanism

Abstract

The invention relates to the technical field of logistics transportation equipment, in particular to a movable cart with a fixing mechanism, the movable cart comprises a cart body, a transmission case, the fixing mechanism and an angle adjusting mechanism, two directional trundles and two self-locking universal wheels are arranged at four corners of the lower end of the cart body, a push handle is arranged at the upper end of the cart body, and two sliding holes are formed in the cart body. The transmission box is located in the middle of the lower end of the vehicle body, the two fixing mechanisms are symmetrically arranged, and the angle adjusting mechanism comprises an angle adjusting table, a mounting rod, a locking assembly and a linkage assembly, according to the movable trolley with the fixing mechanism, goods can be clamped and positioned from the two sides, the stability of the goods in logistics transportation is improved, meanwhile, the folding structural design is adopted, and the occupied space of the trolley is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of logistics transportation equipment, and particularly to a mobile trolley with a fixing mechanism. Background Art

[0002] Traditional mobile trolleys are composed of three major components: a vehicle bottom plate, moving wheels, and a push handle, and are used for short-distance transfer of goods. Among them, the vehicle bottom plate, as a carrier, needs to be made of materials that are not easily deformed and wear-resistant, such as stainless steel and plastic. The push handle is made of metal, and the lower end of the push handle is fixedly connected to the vehicle bottom plate. The moving wheels use a combination of universal wheels and directional wheels, which can not only ensure the stability of the moving process but also facilitate steering.

[0003] With the continuous increase in market demand, the functions that mobile trolleys can achieve are gradually increasing. Among them, the design of a foldable push handle, for example, the patent document with the publication number CN110641530A discloses a goods transportation trolley for logistics, including four groups of universal wheels, a bottom plate, a left baffle, and a right baffle; it also includes a left fixed shaft, a right fixed shaft, two groups of left support plates, two groups of right support plates, a left clamping plate, a right clamping plate, two groups of left blocking rods, two groups of right blocking rods, two groups of left hanging rods, and two groups of right hanging rods; it also includes a front support plate, a rear support plate, two groups of left sliding plates, two groups of right sliding plates, two groups of left fixing plates, two groups of right fixing plates, two groups of left limiting plates, and two groups of right limiting plates. This solution can fold the trolley, and when the trolley is not in use, it can reduce the occupied space of the trolley and is convenient for storage. However, the handle has only two states: open and folded, that is, the height of the handle is not adjustable, and the adaptability is not strong when used by different people. Another example is the goods clamping design. For example, the patent document with the authorization publication number CN221188653U discloses a logistics trolley for a transportation and logistics warehouse, including a bottom plate. An embedded groove is opened at the top of the bottom plate, a limiting mechanism is arranged inside the embedded groove, a fixing mechanism is arranged inside the limiting mechanism, and a stop mechanism is arranged on the front surface of the bottom plate. The fixing mechanism includes a driving motor and two clamping plates. In the process of using this solution, although the clamping plates can be driven to move by the motor to realize the clamping and fixing of goods, the motor itself usually does not have a self-locking function, which will cause the clamping plates to be not firm enough in the adjusted position and are easily displaced due to external force or vibration. The displacement of the clamping plates will reduce the stability of the goods during logistics transportation, and the motor itself is heavy and requires an external power supply, which limits its use environment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects. The present invention provides a mobile trolley with a fixing mechanism, which can adjust the position of the clamping plate, and the position of the clamping plate is self-locked by a worm structure to ensure the stability during logistics transportation. At the same time, the push handle can be adjusted at multiple angles. Moreover, the push handle can be adjusted at multiple angles, and the change in the angle of the push handle is the change in the vertical height, which is suitable for different people to use.

[0005] To achieve the above object, the present invention provides the following technical solutions: A mobile cart with a fixing mechanism, comprising a vehicle body, a transmission box, a fixing mechanism and an angle adjusting mechanism.

[0006] Two directional casters and two self-locking universal wheels are arranged at the four corners of the lower end of the vehicle body. A push handle is arranged at the upper end of the vehicle body, and two sliding holes are arranged on the vehicle body.

[0007] The transmission box is located in the middle of the lower end of the vehicle body; The fixing mechanism is provided with two sets arranged symmetrically; The angle adjusting mechanism includes an angle adjusting table and a mounting rod, a locking assembly and a linkage assembly arranged in the angle adjusting table. The angle adjusting table is arranged at the upper end of the vehicle body. The mounting rod is rotatably arranged in the angle adjusting table in the horizontal direction. The two ends of the mounting rod penetrate through the angle adjusting table and are fixedly connected to the lower end of the push handle.

[0008] Further, the locking assembly includes a limiting wheel and a cross bar. The limiting wheel is coaxially fixed on the outer side of the mounting rod. There are two limiting wheels in this embodiment. A plurality of limiting slots are circumferentially arranged on the outer side of the limiting wheel. The two ends of the cross bar are respectively fixedly connected to the angle adjusting table. There are two cross bars in this embodiment. One cross bar is arranged corresponding to each limiting wheel below. The central axis of the cross bar is perpendicular to the central axis of the limiting wheel in space. Two limiting plates are slidably connected to the outer side of each cross bar. The two limiting plates on the same cross bar are located on both sides of the limiting wheel. The opposite end faces of the two limiting plates on the same cross bar are both provided with limiting pins adapted to the limiting slots.

[0009] Further, the linkage assembly includes two fixing plates II, columns, vertical plates and a bottom plate. There are two fixing plates II. Each fixing plate II is simultaneously connected to the lower ends of the two limiting plates on the same side of the two limiting wheels. The lower surface of the fixing plate II is fixedly connected with an adjusting seat. There are two columns fixedly connected in the angle adjusting table. The columns extend in the vertical direction. A push plate is slidably connected between the two columns. The top of the column is fixedly connected with a limiting end plate. A return spring is sleeved on the outer side of the column. The two ends of the return spring are respectively in contact with the lower end face of the push plate and the bottom wall of the angle adjusting table. The push plate is arranged in the horizontal direction. A connecting seat is arranged on the upper surface of the push plate. An inclined pull rod is arranged between the connecting seat and the two adjusting seats. The two ends of the inclined pull rod are respectively rotatably connected to the adjusting seat and the connecting seat. The upper end of the vertical plate penetrates through the vehicle body and the bottom wall of the angle adjusting table and is fixedly connected to the lower end face of the push plate. The vertical plate is slidably connected to both the vehicle body and the angle adjusting table. The bottom plate is fixedly connected to the lower end of the vertical plate. The bottom plate is located below the vehicle body.

[0010] Furthermore, two partition plates are arranged inside the transmission case. The two partition plates divide the space inside the transmission case into side bins on both sides and an installation bin in the middle. An adjusting shaft is rotatably connected between the two partition plates. A first worm and a second worm are fixedly connected to the middle of the adjusting shaft. The spiral directions of the first worm and the second worm are opposite. The end of the first worm penetrates through the partition plate and the transmission case and is fixedly connected with an adjusting wheel; a first worm gear, a second worm gear, a first driving gear, a second driving gear, a first driven gear and a second driven gear are arranged inside the transmission case. The first worm gear is in transmission connection with the first worm. The first worm gear is coaxially fixed with the first driving gear. The first driven gear is meshed with the first driving gear. The second worm gear is in transmission connection with the second worm. The second worm gear is coaxially fixed with the second driving gear. The second driven gear is meshed with the second driving gear. The two ends of the central axes of the first worm gear, the second worm gear, the first driven gear and the second driven gear are respectively rotatably connected with the transmission case and the vehicle body. The upper ends of the central axes of the first worm gear, the second worm gear, the first driven gear and the second driven gear are fixedly connected with a first connecting rod.

[0011] Furthermore, a single set of fixing mechanism includes an assembly plate, a horizontal sliding plate, a vertical plate and a clamping plate. The assembly plate is located between the two partition plates. Two assembly seats are fixedly connected to the side end face of the assembly plate away from the partition plates. A second connecting rod is rotatably connected inside the assembly seats. The second connecting rod is rotatably connected with the adjacent first connecting rod. The horizontal sliding plate is slidably connected with the partition plate. One end of the horizontal sliding plate is fixedly connected with the assembly plate and the other end extends into the side bin. The lower end of the vertical plate is fixedly connected with the upper surface of the horizontal sliding plate. The upper end of the vertical plate passes through a sliding hole on the vehicle body. The clamping plate is fixedly connected to the upper end of the vertical plate. The upper end of the clamping plate extends out of the sliding hole.

[0012] Furthermore, anti-slip patterns are arranged on the upper surface of the vehicle body.

[0013] Furthermore, a display board is arranged in the middle of the push handle. A sticker slot is arranged inside the display board.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. For the mobile trolley with a fixing mechanism disclosed by the present invention, by arranging the fixing mechanism, the goods on the vehicle body can be clamped bilaterally from both sides, and the position of the adjusted clamping plate is locked through a worm structure, improving the stability during use.

[0015] 2. For the mobile trolley with a fixing mechanism disclosed by the present invention, by arranging an angle adjusting mechanism, multi-angle adjustment and folding of the push handle can be realized, so as to adapt to different users. In the folded state, the storage space is effectively saved, facilitating the placement of the mobile trolley with a fixing mechanism in a warehouse, a container or other limited spaces. Brief Description of the Drawings

[0016] Figure 1 It is a perspective view of the mobile trolley with a fixing mechanism in the embodiment; Figure 2 It is Figure 1 a partial cross-sectional view of; Figure 3 It is a schematic structural diagram of the fixing mechanism in the embodiment; Figure 4 It is a schematic internal structure diagram of the angle adjustment table in the embodiment; Figure 5 It is Figure 4 a partial cross-sectional view of; Figure 6 It is Figure 5 an enlarged view of the position marked C in; Figure 7 It is a schematic structural diagram of the vertical plate and the bottom plate in the embodiment.

[0017] In the figure: 100 - vehicle body, 101 - directional caster, 102 - self-locking universal wheel, 103 - push handle, 104 - sliding hole.

[0018] 200 - transmission box, 201 - partition plate, 202 - adjustment shaft, 203 - first worm, 204 - second worm, 205 - adjustment wheel, 206 - first worm gear, 207 - second worm gear, 208 - first driving gear, 209 - second driving gear, 210 - first driven gear, 211 - second driven gear, 212 - first connecting rod.

[0019] 300 - fixing mechanism, 301 - assembly plate, 302 - horizontal sliding plate, 303 - vertical plate, 304 - clamping plate, 305 - assembly seat, 306 - second connecting rod.

[0020] 400 - angle adjustment mechanism, 401 - angle adjustment table, 402 - mounting rod, 403 - limiting wheel, 404 - cross bar, 405 - limiting slot, 406 - limiting plate, 407 - limiting insertion post, 408 - second fixing plate, 409 - column, 410 - vertical plate, 411 - bottom plate, 412 - adjustment seat, 413 - push plate, 414 - limiting end plate, 415 - return spring, 416 - connecting seat, 417 - inclined pull rod. Detailed Description of the Embodiment

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0022] Please refer to Figure 1-7 , this embodiment provides a mobile trolley with a fixing mechanism, including a vehicle body 100, a transmission box 200, a fixing mechanism 300 and an angle adjustment mechanism 400.

[0023] Two directional casters 101 and two self-locking universal wheels 102 are arranged at the four corners of the lower end of the vehicle body 100. A push handle 103 is arranged at the upper end of the vehicle body 100, and two sliding holes 104 are arranged on the vehicle body 100.

[0024] The transmission box 200 is located in the middle of the lower end of the vehicle body 100. Two partition plates 201 are arranged in the transmission box 200. The space in the transmission box 200 is divided into side compartments A on both sides and an installation compartment B in the middle by the two partition plates 201. An adjustment shaft 202 is rotatably connected between the two partition plates 201. A first worm 203 and a second worm 204 are fixedly connected to the middle of the adjustment shaft 202. The spiral directions of the first worm 203 and the second worm 204 are opposite. The end of the first worm 203 penetrates through the partition plate 201 and the transmission box 200 and is fixedly connected with an adjustment wheel 205. A first worm gear 206, a second worm gear 207, a first driving gear 208, a second driving gear 209, a first driven gear 210 and a second driven gear 211 are arranged in the transmission box 200. The first worm gear 206 is in transmission connection with the first worm 203. The first worm gear 206 is coaxially fixed with the first driving gear 208. The first driven gear 210 is meshed with the first driving gear 208. The second worm gear 207 is in transmission connection with the second worm 204. The second worm gear 207 is coaxially fixed with the second driving gear 209. The second driven gear 211 is meshed with the second driving gear 209. The two ends of the central axes of the first worm gear 206, the second worm gear 207, the first driven gear 210 and the second driven gear 211 are respectively rotatably connected with the transmission box 200 and the vehicle body 100. The upper ends of the central axes of the first worm gear 206, the second worm gear 207, the first driven gear 210 and the second driven gear 211 are fixedly connected with a first connecting rod 212.

[0025] The fixed mechanism 300 is provided in two sets which are symmetrically arranged. A single set of the fixed mechanism includes an assembly plate 301, a horizontal sliding plate 302, a vertical plate 303 and a clamping plate 304. The assembly plate 301 is located between two partition plates 201. Two assembly seats 305 are fixedly connected to the side end face of the assembly plate 301 away from the partition plate 201. A second connecting rod 306 is rotatably connected in the assembly seat 305. The second connecting rod 306 is rotatably connected to the adjacent first connecting rod 212. The horizontal sliding plate 302 is slidably connected to the partition plate 201. One end of the horizontal sliding plate 302 is fixedly connected to the assembly plate 301, and the other end extends into the side bin A. The lower end of the vertical plate 303 is fixedly connected to the upper surface of the horizontal sliding plate 302. The upper end of the vertical plate 303 passes through a sliding hole on the vehicle body 100. The clamping plate 304 is fixedly connected to the upper end of the vertical plate 303. The upper end of the clamping plate 304 extends out of the sliding hole 104.

[0026] The angle adjustment mechanism 400 includes an angle adjustment table 401, and a mounting rod 402, a locking assembly and a linkage assembly arranged in the angle adjustment table 401. The angle adjustment table 401 is arranged at the upper end of the vehicle body 100. The mounting rod 402 is rotatably arranged horizontally in the angle adjustment table 401. The two ends of the mounting rod 402 pass through the angle adjustment table 401 and are fixedly connected to the lower end of the push handle 103.

[0027] The locking assembly includes a limiting wheel 403 and a cross bar 404. The limiting wheel 403 is coaxially fixed to the outside of the mounting rod 402. In this embodiment, there are two limiting wheels 403. A plurality of limiting slots 405 are circumferentially arranged on the outside of the limiting wheel 403. The two ends of the cross bar 404 are respectively fixedly connected to the angle adjustment table 401. In this embodiment, there are two cross bars 404. One cross bar 404 is correspondingly arranged below each limiting wheel 403. The central axis of the cross bar 404 is perpendicular to the central axis of the limiting wheel 403 in space. Two limiting plates 406 are slidably connected to the outside of each cross bar 404. The two limiting plates 406 on the same cross bar 404 are located on both sides of the limiting wheel 403. Limiting insertion posts 407 adapted to the limiting slots 405 are arranged on the opposite end faces of the two limiting plates 406 on the same cross bar 404.

[0028] The linkage assembly includes two fixed plates II (408), columns (409), vertical plates (410) and a bottom plate (411). There are two fixed plates II (408), and each fixed plate II (408) is simultaneously connected to the lower ends of two limiting plates (406) on the same side of two limiting wheels (403). The lower surface of the fixed plate II (408) is fixedly connected with an adjusting seat (412). There are two columns (409) fixedly connected in the angle adjusting table (401), and the columns (409) extend in the vertical direction. A push plate (413) is slidably connected between the two columns (409). The top of the column (409) is fixedly connected with a limiting end plate (414). A return spring (415) is sleeved outside the column (409), and the two ends of the return spring (415) are respectively in contact with the lower end surface of the push plate (413) and the bottom wall of the angle adjusting table (401). The push plate (413) is arranged in the horizontal direction, and a connecting seat (416) is arranged on the upper surface of the push plate (413). An inclined pull rod (417) is arranged between the connecting seat (416) and the two adjusting seats (412), and the two ends of the inclined pull rod (417) are respectively rotatably connected to the adjusting seat (412) and the connecting seat (416). The upper end of the vertical plate (410) penetrates through the vehicle body (100) and the bottom wall of the angle adjusting table (401) and is fixedly connected to the lower end surface of the push plate (413). The vertical plate (410) is slidably connected to both the vehicle body (100) and the angle adjusting table (401). The bottom plate (411) is fixedly connected to the lower end of the vertical plate (410), and the bottom plate (411) is located below the vehicle body (100).

[0029] The working principle of the mobile trolley with a fixing mechanism provided by the present invention is as follows: Place the goods on the upper end of the vehicle body (100), and rotate the adjusting wheel (205). During the rotation of the adjusting wheel (205), the adjusting wheel (205) will drive the first worm (203) and the second worm (204) to rotate through the adjusting shaft (202). The first worm (203) and the second worm (204) drive the first worm gear (206) and the second worm gear (207) to rotate in opposite directions respectively. The first driving gear (208) and the second driving gear (209) coaxial and fixed to the first worm gear (206) and the second worm gear (207) respectively drive the first driven gear (210) and the second driven gear (211) to rotate, thereby driving the first connecting rod (212) to swing. By dragging the second connecting rod (306) through the first connecting rod (212), the assembly plate (301) drives the horizontal sliding plate (302) to move. During the movement of the horizontal sliding plate (302), the vertical plate (303) is used to drive the clamping plate (304) to move, and the distance between the two clamping plates (304) gradually decreases, clamping and limiting the goods from both sides. By pushing or pulling the push handle (103), the movement of the vehicle body (100) is realized.

[0030] When the mobile trolley needs to be angle-adjusted or folded, push the bottom plate 411 upward by hand or foot. During the movement of the bottom plate 411, it will drive the push plate 413 to move upward through the vertical plate 410. The push plate 413 drives the connecting seat 416 to move upward, and the return spring 415 is stretched. During the movement of the connecting seat 416, it will provide an upward thrust for the adjusting seat 412 through the inclined pull rod 417, thereby driving the two fixing plates II 408 to move away from each other. The limit insertion column 407 located inside the fixing plate II 408 is separated from the limit slot 405, and the push handle 103 can be flipped. After flipping a certain angle, release the bottom plate 411, and the return spring 415 resumes deformation. With the cooperation of the self-weight of the vertical plate 410 and the bottom plate 411, it drives the push plate 413 to move downward and reset. During the follow-up process of the connecting seat 416, it will give a downward pull to the adjusting seat 412 through the inclined pull rod 417, so that the inclined pull rod 417 drives the fixing plate II 408 to move through the adjusting seat 412. The fixing plate II 408 will drive the limit insertion column 407 to move through the limit plate 406, and finally make the limit insertion column 407 inserted into the limit slot 405 of the limit wheel 403, thereby realizing the locking and fixing of the push handle 103, and storing the mobile trolley in the warehouse or carrying it into the vehicle in the folded state.

[0031] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A mobile cart with a fixing mechanism, characterized in that: It includes a vehicle body, a transmission box, a fixing mechanism and an angle adjustment mechanism; Two directional casters and two self-locking universal casters are arranged at the four corners of the lower end of the vehicle body. A push handle is arranged at the upper end of the vehicle body, and two sliding holes are arranged on the vehicle body; The transmission box is located in the middle of the lower end of the vehicle body; The fixing mechanism is provided with two sets arranged symmetrically; The angle adjustment mechanism includes an angle adjustment table, a mounting rod, a locking component and a linkage component arranged in the angle adjustment table. The angle adjustment table is arranged at the upper end of the vehicle body. The mounting rod is rotatably arranged horizontally in the angle adjustment table. Both ends of the mounting rod penetrate out of the angle adjustment table and are fixedly connected to the lower end of the push handle.

2. The mobile cart with a fixing mechanism according to claim 1, characterized in that: The locking component includes a limiting wheel and a cross bar. The limiting wheel is coaxially fixed on the outer side of the mounting rod. In this embodiment, there are two limiting wheels. A plurality of limiting slots are circumferentially arranged on the outer side of the limiting wheel. Both ends of the cross bar are fixedly connected to the angle adjustment table. In this embodiment, there are two cross bars. One cross bar is arranged corresponding to the lower part of each limiting wheel. The central axis of the cross bar is perpendicular to the central axis of the limiting wheel in space. Two limiting plates are slidably connected to the outer side of each cross bar. The two limiting plates on the same cross bar are located on both sides of the limiting wheel. Limiting insertion posts adapted to the limiting slots are arranged on the opposite end faces of the two limiting plates on the same cross bar.

3. The mobile cart with a fixing mechanism according to claim 2, characterized in that: The linkage component includes two fixing plates two, columns, vertical plates and a bottom plate. There are two fixing plates two. Each fixing plate two is simultaneously connected to the lower ends of the two limiting plates on the same side of the two limiting wheels. A regulating seat is fixedly connected to the lower surface of the fixing plate two. There are two columns fixedly connected in the angle adjustment table. The columns extend in the vertical direction. A push plate is slidably connected between the two columns. A limiting end plate is fixedly connected to the top of the column. A return spring is sleeved on the outer side of the column. Both ends of the return spring are respectively in contact with the lower end face of the push plate and the bottom wall of the angle adjustment table. The push plate is arranged horizontally. A connecting seat is arranged on the upper surface of the push plate. An inclined pull rod is arranged between the connecting seat and the two regulating seats. Both ends of the inclined pull rod are respectively rotatably connected to the regulating seat and the connecting seat; The upper end of the vertical plate penetrates through the vehicle body and the bottom wall of the angle adjustment table and is fixedly connected to the lower end face of the push plate. The vertical plate is slidably connected to both the vehicle body and the angle adjustment table. The bottom plate is fixedly connected to the lower end of the vertical plate. The bottom plate is located below the vehicle body.

4. The mobile cart with a fixing mechanism according to claim 1, characterized in that: There are two partition plates arranged in the transmission case. The two partition plates divide the space in the transmission case into side bins on both sides and an installation bin in the middle. A regulating shaft is rotatably connected between the two partition plates. The middle part of the regulating shaft is fixedly connected with a first worm and a second worm. The spiral directions of the first worm and the second worm are opposite. The end of the first worm penetrates through the partition plate and the transmission case and is fixedly connected with a regulating wheel. A first worm gear, a second worm gear, a first driving gear, a second driving gear, a first driven gear and a second driven gear are arranged in the transmission case. The first worm gear is in transmission connection with the first worm. The first worm gear is coaxially fixed with the first driving gear. The first driven gear is meshed with the first driving gear. The second worm gear is in transmission connection with the second worm. The second worm gear is coaxially fixed with the second driving gear. The second driven gear is meshed with the second driving gear. The two ends of the central axes of the first worm gear, the second worm gear, the first driven gear and the second driven gear are respectively rotatably connected with the transmission case and the vehicle body. The upper ends of the central axes of the first worm gear, the second worm gear, the first driven gear and the second driven gear are fixedly connected with a first connecting rod.

5. The mobile cart with a fixing mechanism according to claim 4, characterized in that: A single set of fixing mechanism includes an assembly plate, a horizontal sliding plate, a vertical plate and a clamping plate. The assembly plate is located between the two partition plates. Two assembly seats are fixedly connected to the side end face of the assembly plate away from the partition plates. A second connecting rod is rotatably connected in the assembly seats. The second connecting rod is rotatably connected with the adjacent first connecting rod. The horizontal sliding plate is slidably connected with the partition plate. One end of the horizontal sliding plate is fixedly connected with the assembly plate and the other end extends into the side bin. The lower end of the vertical plate is fixedly connected with the upper surface of the horizontal sliding plate. The upper end of the vertical plate passes through a sliding hole on the vehicle body. The clamping plate is fixedly connected to the upper end of the vertical plate. The upper end of the clamping plate extends out of the sliding hole.

6. The mobile cart with a fixing mechanism according to claim 1, characterized in that: Anti-slip patterns are arranged on the upper surface of the vehicle body.

7. The mobile cart with a fixing mechanism according to claim 1, characterized in that: A display board is arranged in the middle of the push handle. A sticker slot is arranged in the display board.

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