A trolley bag made of PC material

Abstract

The present invention relates to the field of trolley bags, and more specifically, a trolley bag made of PC material, comprising a first box body, a second box body hingedly connected to a side of the first box body, the second box body being the same size as the first box body and the sides of the first box body and the second box body being sealed and connected by a zipper, a seat being fixedly connected to the top wall panel of the second box body, and the seat being slidably connected to the first box body. The present invention is used to solve the defects of existing trolley bags made of PC material when used in the special environment of traveling by mothers carrying babies. In such cases, the mother needs to take care of the baby, and pulling the trolley bag throughout the entire process is very tiring and laborious. On the other hand, the existing trolley bags cannot provide effective protection for the baby. Secondly, the mother needs to take care of the baby and make sure that the luggage is not pulled away during the entire trip, which is very troublesome.

Description

Technical Field

[0001] The invention relates to the field of trolley bags, in particular to a trolley bag made of PC material. Background Art

[0002] With the improvement of people's living standards, people's travel is also very convenient, so trolley bags are used in many places.

[0003] However, the existing PC material trolley bags still have certain defects when used, especially for trolley bags used in some special situations. For example, when a mother with a baby is traveling, she needs to take care of the baby, and pulling the trolley bag during the whole process is very tiring and laborious. On the other hand, the existing trolley bags cannot provide effective protection for the baby. Secondly, the mother has to take care of the baby and make sure that the luggage is not pulled away during the whole trip, which is very troublesome. Therefore, we propose a PC material trolley bag to solve the above problems. Summary of the Invention

[0004] In view of the problems in the prior art, the present invention provides a trolley case made of PC material.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a PC material trolley case, comprising a first box body, a second box body hinged on the side of the first box body, the second box body is the same size as the first box body and the sides between the first box body and the second box body are sealed and connected by a zipper, a seat is fixedly connected to the top wall panel of the second box body, the seat is slidably connected to the first box body, a T-shaped safety belt is fixedly connected to the seat, the bottom of the safety belt is fixedly connected to the bottom center of the seat, the top two ends of the safety belt are respectively fixedly connected to a first buckle and a second buckle, the first buckle is clamped with the second buckle, the first buckle is fixedly connected to the back of the seat, the side of the first box body is fixedly connected to a storage The cam is connected to the rear of the seat frame by means of a sliding groove, and the cam is connected to the rear of the seat frame by means of a sliding groove. The cam is connected to the rear of the seat frame by means of a sliding groove. The cam is connected to the rear of the seat frame by means of a sliding groove. The cam is connected to the rear of the seat frame by means of a sliding groove. The cam is connected to the rear of the seat frame by means of a sliding groove. The cam is connected to the rear of the seat frame by means of a sliding groove. The cam is connected to the rear of the seat frame by means of a sliding groove.

[0006] Preferably, the transmission assembly includes a first slide post, a second slide post, a second groove, a protective rod, a rotating block, a rotating shaft and a connecting rod, the first slide post is slidably connected to the side of the first box body, the bottom of the first slide post close to the pull rod is fixedly connected to the connecting rod, the pull rod is fixedly connected to the bottom side of the first slide post through the connecting rod, the top of the first slide post is rotatably connected to the second slide post, the second slide post is provided with a second groove with an isosceles trapezoidal cross-section, and the side of the second groove coincides with the edge of the top of the second slide post, the connecting rod is slidably connected to the inside of the first box body, and the connecting rod slides with the first box body. The top of the first slide is fixedly connected to a rotating shaft, and the rotating shaft is rotatably connected to the second slide. The second slide and the first slide are both slidably connected to the side of the first box. The end of the second slide away from the first slide is rotatably connected to a rotating block, and the end of the protective rod is rotatably connected in the rotating block. A second groove is provided on the top of the second slide, and the protective rod is received inside the second groove. There are two transmission assemblies and the protective rods on the two transmission assemblies intersect at the middle section of the front of the seat after being transmitted by the linkage assembly. The rotating blocks in the transmission assemblies rotate in opposite directions.

[0007] Preferably, the rotating assembly includes a slide plate, a lifting rod, a block, a spring and a slide groove, the slide plate is slidably connected to the side of the first box body and the slide plate is located at the outermost side of the first box body, the bottom of the slide plate is movably connected to the lifting rod, the side of the pull rod is provided with a slide groove, the slide groove is slidably connected to the lifting rod, the lifting rod is slidably connected to the first box body, the second slide column is slidably connected to the end near the first slide column, one end of the block is fixedly connected to the spring, the spring is fixedly connected to the inner wall plate of the second slide column, the block is slidably connected to the second slide column, the block is transmission connected to the slide, and the length of the slide is the same as the distance from the block to the bottom of the slide groove.

[0008] The first gear and the second gear are respectively located at two ends of the same side of the rack, and an empty slot is opened in the interior of the second slide post, and the second gear is rotatably connected to the interior of the empty slot through a connecting piece located on one side of the second gear, and the second gear is rotatably connected to the interior of the empty slot, and the second gear is also rotatable. One side is fixedly connected to a first bevel gear, the first bevel gear is meshed with the second bevel gear, the second bevel gear is fixedly connected to the first rotating shaft, the first rotating shaft is fixedly connected to the rotating block, the internal rotation of the rotating block is connected to the second rotating shaft, the protective rod is fixedly connected to the second rotating shaft, the protective rod is rotatably connected to the rotating block through the second rotating shaft, the second rotating shaft is fixedly connected to a connecting rope, and the connecting rope is slidably sleeved on the center of the first rotating shaft, the side of the first bevel gear away from the second gear is fixedly connected to a rotating disk, the rotating disk is fixedly connected to the connecting rope, and the rotating disk is transmission-connected to the second rotating shaft through the connecting rope, and the radius of the second rotating shaft is the same as the axial distance from the connecting rope on the rotating disk to the rotating disk.

[0009] Preferably, there are two linkage assemblies, and the two linkage assemblies are mirror-imaged at a midpoint of the distance between the two second sliding columns.

[0010] Beneficial effects of the present invention:

[0011] 1: Through the design of the safety belt and the seat, when placing the baby, it is only necessary to place one leg of the baby on one side of the T-shaped lower end part of the safety belt, which is very convenient for placement and can also effectively prevent the baby from accidentally falling. Through the design of the baffle, the first buckle and the second buckle are hidden in the first groove, which effectively prevents the safety belt from being unfastened by people with bad intentions during the journey, and effectively increases the safety of the baby.

[0012] 2: Through the design of the transmission component, the first slide column, the second slide column and the protective rod provide effective protection for the baby. At the same time, through the design of the rotating component, people with babies no longer need to manually rotate the second slide column, so that the second slide column naturally rotates to both sides of the seat, effectively improving the speed and convenience of using the device. Placing the baby on the seat also effectively saves the physical strength and energy of tourists.

[0013] 3: Through the design of the linkage component, during the rotation between the second sliding column and the first sliding column, the protective bar inside the rotating block is horizontally placed in front of the seat, and at the same time, the protective bar is horizontally placed in front of the seat. On the one hand, it protects the baby, and on the other hand, it allows the baby to rest his hands on the protective bar for self-entertainment, effectively alleviating the baby's crying caused by the long journey, and indirectly allowing parents to not worry too much about the baby. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and examples.

[0015] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of a PC material trolley bag provided by the present invention;

[0016] Figure 2 for Figure 1 A partial structural cross-sectional view of AA shown;

[0017] Figure 3 for Figure 2 A partial structural cross-sectional view of BB shown;

[0018] Figure 4 for Figure 1 The schematic diagram of the structure in the state of protecting the baby is shown;

[0019] Figure 5 for Figure 4 A structural cross-sectional view of the second sliding column shown;

[0020] Figure 6 for Figure 5 A structural cross-sectional view of another portion of the linkage assembly is shown;

[0021] Figure 7 for Figure 5 A top cross-sectional view of the structure of the transmission assembly shown;

[0022] Figure 8 for Figure 1 The schematic diagram of the structure after the first box body and the second box body are opened is shown;

[0023] Figure 9 for Figure 1 Schematic diagram of the structure of the pull rod shown.

[0024] In the figure: 1. first box body; 11. second box body; 12. pull rod; 13. seat; 14. safety belt; 15. baffle; 16. storage slot; 17. first groove; 18. first buckle; 19. second buckle; 2. transmission assembly; 21. first slide post; 22. second slide post; 23. second groove; 24. protective rod; 25. rotating block; 26. rotating shaft; 27. connecting rod; 3. rotating assembly; 31. slide plate; 32. lifting rod; 33. block; 34. spring; 35. slide groove; 4. linkage assembly; 41. first gear; 42. rack; 43. limit bar; 44. second gear; 45. first bevel gear; 46. second bevel gear; 47. first rotating shaft; 48. second rotating shaft; 49. connecting rope; 491. rotating disk; 492. empty slot. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0026] like Figures 1-9 As shown, the present invention relates to a PC material trolley bag, comprising a first box body 1, a second box body 11 being hingedly connected to the side of the first box body 1, the second box body 11 being the same size as the first box body 1 and the sides between the first box body 1 and the second box body 11 being sealed and connected by a zipper, a seat 13 being fixedly connected to the top wall panel of the second box body 11, the seat 13 being slidably connected to the first box body 1, a T-shaped safety belt 14 being fixedly connected to the seat 13, the bottom of the safety belt 14 being fixedly connected to the bottom center of the seat 13, the top two ends of the safety belt 14 being fixedly connected to a first buckle 18 and a second buckle 19 respectively, the first buckle 18 being snapped with the second buckle 19, the first buckle 18 being fixedly connected to the back of the seat 13, the side of the first box body 1 being fixedly connected to a storage slot 16, the storage slot 1 6 is internally slidably sleeved with an inverted U-shaped pull rod 12, and the middle part of the inverted U-shape of the pull rod 12 is fixedly connected to a baffle 15. A first groove 17 is provided at the center of the baffle 15, and a first clip 18 is slidably connected to the first groove 17, and a second clip 19 is movably slidably connected to the first groove 17. The pull rod 12 is transmission-connected with a transmission assembly 2, which is located inside the first box body 1 and is located in the same plane as the pull rod 12 when the pull rod 12 is stored in the storage groove 16. A rotating assembly 3 is provided on both sides of the seat 13, and a linkage assembly 4 is provided inside the rotating assembly 3. The rotating assembly 3 is arranged on the side of the first box body 1 and the rotating assembly 3 is slidably connected to the first box body 1. The linkage assembly 4 is arranged on the transmission assembly 2. There are two transmission assemblies 2, which are located on both sides of the pull rod 12 respectively.

[0027] Among them, the transmission assembly 2 includes a first slide post 21, a second slide post 22, a second groove 23, a protective rod 24, a rotating block 25, a rotating shaft 26 and a connecting rod 27. The first slide post 21 is slidably connected to the side of the first box body 1. The bottom of the first slide post 21 close to the pull rod 12 is fixedly connected to the connecting rod 27. The pull rod 12 is fixedly connected to the bottom side of the first slide post 21 through the connecting rod 27. The top of the first slide post 21 is rotatably connected to the second slide post 22. The second slide post 22 is provided with a second groove 23 with an isosceles trapezoidal cross-section and the side of the second groove 23 coincides with the edge of the top of the second slide post 22. The connecting rod 27 is slidably connected to the inside of the first box body 1. The connecting rod 27 is fixed to the first box body 1. The body 1 is slidably connected, the top of the first slide post 21 is fixedly connected to the rotating shaft 26, and the rotating shaft 26 is rotatably connected to the second slide post 22. The second slide post 22 and the first slide post 21 are both slidably connected to the side of the first box body 1, and the end of the second slide post 22 away from the first slide post 21 is rotatably connected to the rotating block 25, and the end of the protective rod 24 is rotatably connected to the rotating block 25. A second groove 23 is provided on the top of the second slide post 22, and the protective rod 24 is received inside the second groove 23. There are two transmission assemblies 2 and the protective rods 24 on the two transmission assemblies 2 intersect at the middle section in front of the seat 13 after being transmitted by the linkage assembly 4, and the rotating blocks 25 in the transmission assembly 2 rotate in opposite directions.

[0028] Among them, the rotating assembly 3 includes a slide plate 31, a lifting rod 32, a block 33, a spring 34 and a slide groove 35. The slide plate 31 is slidably connected to the side of the first box body 1 and the slide plate 31 is located at the outermost side of the first box body 1. The bottom of the slide plate 31 is movably connected to the lifting rod 32. The side of the pull rod 12 is provided with a slide groove 35. The slide groove 35 is slidably connected to the lifting rod 32. The lifting rod 32 is slidably connected to the first box body 1. The end of the second slide post 22 near the first slide post 21 is slidably connected with a block 33. One end of the block 33 is fixedly connected to the spring 34. The spring 34 is fixedly connected to the inner wall panel of the second slide post 22. The block 33 is slidably connected to the second slide post 22. The block 33 is transmission-connected to the slide plate 31. The length of the slide plate 31 is the same as the distance from the block 33 to the bottom of the slide groove 35.

[0029] Among them, the linkage assembly 4 includes a first gear 41, a rack 42, a limit bar 43, a second gear 44, a first bevel gear 45, a second bevel gear 46, a first rotating shaft 47, a second rotating shaft 48, a connecting rope 49, a rotating disk 491 and an empty slot 492. The first gear 41 is fixedly sleeved on the rotating shaft 26. The first gear 41 is meshed with a rack 42, and the rack 42 is slidably connected to the inside of the second sliding post 22. The middle section of the rack 42 is fixedly connected to the limit bar 43, and the limit bar 43 is movably engaged with the inside of the second sliding post 22. The rack 42 is meshed with the second gear 44. The first gear 41 and the second gear 44 are respectively located at the two ends of the same side of the rack 42. An empty slot 492 is opened in the interior of the second sliding post 22. The second gear 44 is rotatably connected to the inside of the empty slot 492 through a connecting piece located on one side of the second gear 44. The other side of the wheel 44 is fixedly connected to a first bevel gear 45, which is meshed with a second bevel gear 46, and the second bevel gear 46 is fixedly connected to a first rotating shaft 47. The first rotating shaft 47 is fixedly connected to the rotating block 25, and the internal rotation of the rotating block 25 is connected to the second rotating shaft 48. The protective rod 24 is fixedly connected to the second rotating shaft 48, and the protective rod 24 is rotatably connected to the rotating block 25 through the second rotating shaft 48. A connecting rope 49 is fixedly connected to the second rotating shaft 48, and the connecting rope 49 is slidably sleeved on the center of the first rotating shaft 47. The side of the first bevel gear 45 away from the second gear 44 is fixedly connected to a rotating disk 491, and the rotating disk 491 is fixedly connected to the connecting rope 49. The rotating disk 491 is transmission-connected to the second rotating shaft 48 through the connecting rope 49. The radius of the second rotating shaft 48 is the same as the axial distance from the connecting rope 49 on the rotating disk 491 to the rotating disk 491.

[0030] There are two linkage assemblies 4 in total, and the two linkage assemblies 4 are mirror-imaged at the midpoint of the distance between the two second sliding posts 22 .

[0031] Working principle: When using the present invention, first place the baby on the seat 13 and place one of the baby's legs on one side of the T-shaped lower end of the safety belt 14, then buckle the second buckle 19 on the first buckle 18, the safety belt 14 can effectively prevent the baby from falling accidentally, then pull the pull rod 12, the rise of the pull rod 12 will drive the baffle 15 to rise, and then the first buckle 18 and the second buckle 19 are hidden in the first groove 17, effectively preventing the safety belt 14 from being unfastened by people with bad intentions during the journey, effectively increasing the safety of the baby, because the baby's legs tend to kick randomly, through the design of the safety belt 14, when placing the baby, only one leg of the baby needs to be placed on one side of the T-shaped lower end of the safety belt 14, which is very convenient to place.

[0032] In the process of lifting the pull rod 12, the pull rod 12 will drive the first slide post 21 to rise. In the process of the first slide post 21 rising, the first slide post 21 will drive the second slide post 22 to rise. When the bottom of the slide groove 35 on the first slide post 21 is at the same height as the slide plate 31, the slide groove 35 drives the slide plate 31 to rise through the lifting rod 32. When the rotating shaft 26 rises to the outside of the first box body 1, due to the elastic force exerted by the spring 34 on the block 33, the block 33 exerts an elastic force on the slide plate 31, thereby causing the block 33 to The slide plate 31 exerts a reaction force on the second slide post 22, thereby effectively rotating the second slide post 22 toward the side opposite to the slide plate 31. After the second slide post 22 rotates a certain distance, the second slide post 22 rotates automatically due to gravity until the first slide post 21 and the second slide post 22 are perpendicular. The design of the rotating assembly 3 eliminates the need to manually rotate the second slide post 22 when pulling the pull rod 12, effectively improving the speed and convenience of the device.

[0033] During the rotation between the second slide post 22 and the first slide post 21, Figure 4 The rotating shaft 26 in the linkage assembly 4 shown does not move. The power provided by the rotation of the second slide post 22 causes the rack 42 to be driven by the first gear 41 to move in the direction of the rotating block 25, thereby causing the rack 42 to drive the second gear 44 to rotate clockwise. The first bevel gear 45 will also rotate clockwise through the drive of the second gear 44, thereby causing the second bevel gear 46 to rotate counterclockwise, and the counterclockwise rotation of the second bevel gear 46 will cause the first rotating shaft 47 to rotate counterclockwise, thereby driving the rotating block 25 to rotate counterclockwise. Since the relative rotation between the first slide post 21 and the second slide post 22 is only 90°, the rack 42 drives the second gear 44, the first bevel gear 45 and the second bevel gear 46 to rotate 90°. Since the two linkage assemblies 4 are mirror-imaged, The rotation directions of the rotating blocks 25 at the ends of the two second sliding columns 22 are opposite, so that the protective rod 24 inside the rotating block 25 is horizontal in front of the seat 13. In the process of the rack 42 driving the second gear 44 to rotate, the rotating disk 491 will also wrap the connecting rope 49 around the rotating disk 491. In this process, since the radius of the second rotating shaft 48 is the same as the axial distance from the connecting rope 49 on the rotating disk 491 to the rotating disk 491, the rotating disk 491 will also drive the second rotating shaft 48 to rotate 90°, so that the protective rod 24 is horizontal in front of the seat 13. On the one hand, it plays a protective role for the baby. On the other hand, it also allows the baby to hold his hands on the protective rod 24 for self-entertainment, effectively alleviating the baby's crying due to the long journey, and indirectly allowing parents to not worry too much about the baby.

[0034] After the journey, you only need to pick up the baby from the seat 13. The T-shaped design of the safety belt 14 and the design of the protective rod 24 in the transmission assembly 2 horizontally in front of the middle section of the seat 13 prevent the child's legs from being stuck on the seat 13, which is very convenient. After the pull rod 12 is folded, the first buckle 18 and the second buckle 19 are unfastened, making it convenient to place the baby on the seat 13 next time. In the process of folding the pull rod 12, the pull rod 12 will drive the first slide post 21 to descend. When the first slide post 21 descends to the inside of the first box body 1, the side of the first box body 1 applies a force to the second slide post 22, causing the second slide post 22 to gradually move from horizontal to vertical. At this time, the second slide post 22 will make Figure 4 The rack 42 in the middle moves toward the direction of the first gear 41, thereby causing the rack 42 to rotate the rotating block 25 90° through the second gear 44, the first bevel gear 45 and the second bevel gear 46. At this time, the protective rod 24 will also rotate. When the second slide post 22 rotates to be almost perpendicular to the top plane of the first box body 1, due to the action of gravity, the protective rod 24 will be received inside the second groove 23, thereby allowing the second slide post 22 to be smoothly and effectively received inside the side of the first box body 1 without being stuck by the protective rod 24. The rotating disk 491 lowers the connecting rope 49 again so that the protective rod 24 can be rotated next time.

[0035] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PC material trolley bag, comprising a first box body (1), characterized in that: The side of the first box (1) is hinged with a second box (11), the second box (11) is the same size as the first box (1) and the side between the first box (1) and the second box (11) is sealed by a zipper, a seat (13) is fixedly connected to the top wall of the second box (11), the seat (13) is slidably connected to the first box (1), a T-shaped safety belt (14) is fixedly connected to the seat (13), the bottom of the safety belt (14) is fixedly connected to the bottom center of the seat (13), the top two ends of the safety belt (14) are respectively fixedly connected with a first buckle (18) and a second buckle (19), the first buckle (18) is clamped with the second buckle (19), the first buckle (18) is fixedly connected to the back of the seat (13), the side of the first box (1) is fixedly connected with a storage groove (16), the interior of the storage groove (16) is slidably sleeved with an inverted U-shaped pull rod (12 ), the inverted U-shaped middle part of the pull rod (12) is fixedly connected to a baffle (15), a first groove (17) is provided at the center of the baffle (15), the first buckle (18) is slidably connected to the first groove (17), and the second buckle (19) is movably slidably connected to the first groove (17), the pull rod (12) is transmission-connected to a transmission assembly (2), the transmission assembly (2) is located inside the first box (1) and when the pull rod (12) is stored in the storage groove (16), the transmission assembly (2) and the pull rod (12) are located in the same plane, a rotating assembly (3) is provided on both sides of the seat (13), a linkage assembly (4) is provided inside the rotating assembly (3), the rotating assembly (3) is arranged on the side of the first box (1) and the rotating assembly (3) is slidably connected to the first box (1), the linkage assembly (4) is arranged on the transmission assembly (2), and there are two transmission assemblies (2), which are respectively located on both sides of the pull rod (12); The transmission assembly (2) includes a first slide post (21), a second slide post (22), a second groove (23), a protective rod (24), a rotating block (25), a rotating shaft (26) and a connecting rod (27). The first slide post (21) is slidably connected to the side of the first box body (1). The bottom of the first slide post (21) close to the pull rod (12) is fixedly connected to the connecting rod (27). The pull rod (12) is fixedly connected to the bottom side of the first slide post (21) through the connecting rod (27). The top of the first slide post (21) is rotatably connected to the second slide post (22). The second slide post (22) is provided with a second groove (23) with an isosceles trapezoidal cross section, and the side of the second groove (23) coincides with the edge of the top of the second slide post (22). The connecting rod (27) is slidably connected to the inside of the first box body (1). The connecting rod (27) is fixedly connected to the first box body. (1) Sliding connection, the top of the first slide post (21) is fixedly connected with a rotating shaft (26), the rotating shaft (26) is rotatably connected with the second slide post (22), the second slide post (22) and the first slide post (21) are both slidably connected to the side of the first box body (1), the end of the second slide post (22) away from the first slide post (21) is rotatably connected with a rotating block (25), the end of the protective rod (24) is rotatably connected in the rotating block (25), the top of the second slide post (22) is provided with a second groove (23), the protective rod (24) is received in the inside of the second groove (23), there are two transmission assemblies (2) and the protective rods (24) on the two transmission assemblies (2) intersect at the middle section of the front of the seat (13) after being transmitted by the linkage assembly (4), and the rotating blocks (25) in the transmission assemblies (2) rotate in opposite directions; The rotating assembly (3) includes a slide plate (31), a lifting rod (32), a block (33), a spring (34) and a slide groove (35), wherein the slide plate (31) is slidably connected to the side of the first box body (1) and the slide plate (31) is located at the outermost side of the first box body (1), the bottom of the slide plate (31) is movably connected to the lifting rod (32), the side of the pull rod (12) is provided with a slide groove (35), the slide groove (35) is slidably connected to the lifting rod (32), the lifting rod (32) is connected to the first box body ( 1) Sliding connection, a block (33) is slidably connected to the end of the second slide post (22) near the first slide post (21), one end of the block (33) is fixedly connected to a spring (34), and the spring (34) is fixedly connected to the inner wall plate of the second slide post (22), the block (33) is slidably connected to the second slide post (22), the block (33) is transmission-connected to the slide plate (31), and the length of the slide plate (31) is the same as the distance from the block (33) to the bottom of the slide groove (35).

2. The PC material trolley bag according to claim 1, characterized in that: The linkage assembly (4) comprises a first gear (41), a rack (42), a limit bar (43), a second gear (44), a first bevel gear (45), a second bevel gear (46), a first rotating shaft (47), a second rotating shaft (48), a connecting rope (49), a rotating disk (491) and an empty slot (492), wherein the first gear (41) is fixedly sleeved on the rotating shaft (26), a rack (42) is meshedly connected to the first gear (41), the rack (42) is slidably connected to the inside of the second sliding column (22), and the rack A limiting strip (43) is fixedly connected to the middle section of the rack (42), and the limiting strip (43) is movably connected to the inside of the second slide column (22). The rack (42) is meshed with a second gear (44). The first gear (41) and the second gear (44) are respectively located at the two ends of the same side of the rack (42). An empty slot (492) is provided inside the second slide column (22). The second gear (44) is rotatably connected to the inside of the empty slot (492) through a connecting piece located on one side of the second gear (44). The second gear (41) is connected to the inside of the empty slot (492). 4) The other side is fixedly connected with a first bevel gear (45), the first bevel gear (45) is meshedly connected with a second bevel gear (46), the second bevel gear (46) is fixedly connected with a first rotating shaft (47), the first rotating shaft (47) is fixedly connected with the rotating block (25), the interior of the rotating block (25) is rotatably connected with a second rotating shaft (48), the protective rod (24) is fixedly connected with the second rotating shaft (48), the protective rod (24) is rotatably connected with the rotating block (25) through the second rotating shaft (48), the second rotating shaft (4 8) is fixedly connected with a connecting rope (49), the connecting rope (49) is slidably sleeved at the center of the first rotating shaft (47), the first bevel gear (45) is fixedly connected with a rotating disk (491) on the side away from the second gear (44), the rotating disk (491) is fixedly connected to the connecting rope (49), the rotating disk (491) is transmission-connected to the second rotating shaft (48) through the connecting rope (49), and the radius of the second rotating shaft (48) is the same as the axial distance from the connecting rope (49) on the rotating disk (491) to the rotating disk (491).

3. The PC material trolley bag according to claim 2, characterized in that: There are two linkage assemblies (4) in total, and the two linkage assemblies (4) are mirror-imaged at the midpoint of the distance between the two second sliding posts (22).

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