Novel draw-bar box

Abstract

The utility model belongs to the technical field of draw-bar boxes, and particularly relates to a novel draw-bar box which comprises a box body, a draw bar and rolling wheels, a connecting part is arranged on the box body, a supporting assembly is arranged on the back of the box body, the top end of the supporting assembly is rotatably connected with the connecting part, the supporting assembly can rotate relative to the connecting part, and the supporting assembly comprises a support and supporting wheels. A rotating piece is arranged at the top end of the support and rotationally connected with the connecting part, the supporting wheel is arranged at the bottom end of the support, a limiting assembly and a control switch are arranged in the connecting part, the control switch is controlled to drive the limiting assembly to move, and the limiting assembly can be clamped with the rotating piece so as to limit rotation of the support. The control switch is controlled to drive the limiting assembly to move to release the clamping state with the rotating piece, at the moment, the support can rotate relative to the connecting part, more labor can be saved when a user pulls the draw-bar box in an inclined mode, the supporting assembly on the draw-bar box can be rapidly unfolded and folded, and the novel draw-bar box is convenient for the user to use.

Description

Technical Field

[0001] The utility model belongs to the technical field of trolley cases, in particular to a new trolley case. Background Art

[0002] Trolley case is a type of luggage. The trolley case includes a box body, a trolley and wheels at the bottom of the case, and is widely used because it is convenient for carrying luggage. However, the traditional trolley case only provides a box body for storing items. Although it is easy to push and pull, it does not have other additional practical functions. The bottom of the traditional trolley case is provided with four rollers. On a flat ground at a short distance, the trolley case can usually be pushed to move by pushing it flatly. However, when it is a long distance or on a slope, the user needs to tilt the trolley case to pull it. At this time, part of the gravity of the trolley case will be dispersed to the user's hand, giving it a downward pressure, which will greatly increase the user's load. If the pulling time is too long, it will cause arm fatigue and soreness. In order to solve the above problems, the manufacturer later added a support component on the back of the trolley case, and the support component has wheels. When the user tilts the trolley case to pull it, the support component can be unfolded, thereby greatly reducing the gravity of the trolley case borne by the arm. After use, the support component can be stored again, which is convenient for the storage of the trolley case. However, the current support component on the trolley case has a complex unfolding and storage structure, and the user cannot quickly unfold or store the support component, which is inconvenient for the user to operate. Summary of the invention

[0003] The utility model aims to provide a new type of trolley case with a simple structure, which can save effort when the user tilts the trolley case, and the supporting components on the trolley case can be quickly unfolded and stored, making it convenient for the user to use.

[0004] The purpose of the utility model is achieved in this way:

[0005] A new type of trolley case, including a draw rod arranged at the upper end of the case and a rolling wheel arranged at the lower end of the case, a connecting part is provided on the case, a supporting assembly is provided on the back of the case, the top end of the supporting assembly is rotatably connected to the connecting part, the supporting assembly can rotate relative to the connecting part, the supporting assembly includes a bracket and a supporting wheel, a rotating part is provided at the top end of the bracket, the rotating part is rotatably connected to the connecting part, the supporting wheel is arranged at the bottom end of the bracket, a limit assembly and a control switch connected to the limit assembly are movably provided in the connecting part, controlling the control switch can drive the limit assembly to move, the limit assembly can be engaged with the rotating part to limit the rotation of the bracket, and controlling the control switch drives the limit assembly to move and release the engaged state with the rotating part, at which time the bracket can rotate relative to the connecting part.

[0006] Furthermore, a rotation space is formed on both sides of the connecting portion, and the inner walls of the rotation spaces on both sides are respectively provided with a first rotation groove and a second rotation groove, the bracket includes a first support rod, a second support rod and a base frame, the bottom ends of the first support rod and the second support rod are connected to the base frame, the support wheels are respectively arranged at both ends of the base frame, the rotating member includes a first rotation member and a second rotation member, the first rotation member and the second rotation member are respectively arranged at the top ends of the first support rod and the second support rod, the first rotation member and the second rotation member are respectively passed through the first rotation groove and the second rotation groove to be rotatably connected to the connecting portion in the rotation spaces on both sides of the connecting portion, and the connecting portion is provided with a There is a limit hole connecting two rotation spaces, the limit assembly is arranged in the limit hole, the limit assembly includes a limit rod, the inner side surface of the second rotating member is provided with a first clamping groove and a second clamping groove, one end of the limit rod is exposed in the rotation space and is arranged in the first clamping groove and clamped with the second rotating member, a sliding hole is opened on the connecting part, the control switch is slidably arranged in the sliding hole, the sliding hole is connected with the limit hole, the bottom of the control switch is arranged in the limit hole and connected with the limit rod, sliding the control switch can drive the limit rod to move horizontally and then disengage from the first clamping groove, at this time, the first rotating member and the second rotating member can rotate relative to the connecting part.

[0007] Furthermore, the limit assembly also includes a return spring, the limit rod is provided with a step portion, the return spring is sleeved on the other end of the limit rod, and the two ends of the return spring are respectively in contact with the step portion and the inner side surface of the first rotating member.

[0008] Furthermore, a linkage hole is provided on the first rotating member and the second rotating member, a linkage groove is provided in the connecting portion, a linkage rod is provided in the linkage groove, two ends of the linkage rod respectively pass through the rotating space on both sides of the connecting portion and are arranged in the linkage holes of the first rotating member and the second rotating member to be connected with the first rotating member and the second rotating member, a rotation hole is provided on the first rotating member and the second rotating member, a connecting hole is provided on the connecting portion, and a connecting rod is provided in the connecting hole and the rotating hole.

[0009] The support frame is provided at the bottom of the box body, and the support frame includes a load-bearing rod and a mounting rod, and the rolling wheels are respectively arranged at two ends of the load-bearing rod, and mounting blocks are symmetrically arranged in the storage slot, and the mounting rod is arranged between the symmetrical mounting blocks, and the mounting blocks are both abutted against the upper surface of the load-bearing rod. The connecting part is provided with a mounting hole that passes through the connecting part, and the top of the mounting rod is arranged in the mounting hole and connected to the connecting part. The connecting part can be detachably mounted on the box body, and a clamping assembly and a sliding rod for controlling the clamping assembly to move up and down are provided in the mounting rod, and a protrusion is provided between the symmetrical mounting blocks, and the protrusion passes through the mounting rod and is clamped with the clamping assembly, and a supporting block is provided at the bottom of the box body. Controlling the sliding rod can drive the clamping assembly to move downward and release the clamping state with the protrusion, and the box body can be removed from the mounting frame.

[0010] The top end of the pushing rod is provided with a rod hole, and one end of the protrusion passes through the rod hole and is arranged in the mounting rod. The bottom end of the protrusion is provided with a buckle groove, and the top end of the pushing rod is extended to form a buckle portion, and the buckle portion is arranged in the buckle groove and is engaged with the protrusion. The buckle portion is formed with a first inclined surface, and the protrusion is formed with a second inclined surface adapted to the first inclined surface. The bottom end of the pushing block is extended to form a limiting block, and a pushing spring is provided in the control groove, and the top end of the pushing spring is sleeved on the limiting block and abuts against the bottom of the pushing block, and the bottom end of the pushing spring abuts against the bottom of the control groove.

[0011] The cam is configured to move the second end of the second telescopic rod toward the rear of the linkage, and the cam is configured to move the second end of the second telescopic rod toward the rear of the linkage, so that the cam can move relative to the first telescopic rod and the linkage can move relative to the second telescopic rod. The second clamping hole is clamped with the first telescopic rod, the top end of the second driving member passes through the second bottom sleeve and is arranged in the second telescopic rod, a control rod is arranged in the second telescopic rod, the bottom end of the control rod is connected with the top end of the second driving member, a pressing switch is movably provided on the pulling handle, the top end of the control rod passes through the pulling handle and is connected with the pressing switch, pressing the pressing switch can drive the control rod to move downward, the control rod pushes the second driving member to move downward, the second driving member pushes the second clamping member to move inward so that the second clamping member is disengaged from the second clamping hole and the first telescopic rod is released from the clamping state, at this time, the second telescopic rod can move upward relative to the first telescopic rod;

[0012] The top end of the first telescopic rod is exposed outside the mounting rod, the top end of the first telescopic rod is provided with a handrail handle, the bottom end of the first telescopic rod is provided with a first bottom sleeve, a first driving member and a first clamping member are movably provided in the first bottom sleeve, a first abutting inclined surface is formed on the first clamping member, and a first driving inclined surface adapted to the first abutting inclined surface is formed at the bottom of the first driving member. A plurality of first clamping holes are opened on the mounting rod, one end of the first clamping member passes through the first bottom sleeve and is arranged in the first clamping hole and is clamped with the mounting rod, the top end of the first driving member passes through the first bottom sleeve and is arranged in the first telescopic rod, the second bottom sleeve is located above the first driving member and abuts against the top end of the first driving member, after the second clamping member is released from the clamping state with the first telescopic rod, the second telescopic rod is driven to move downward, at this time, the second bottom sleeve drives the first driving member to move downward, and the first driving member pushes the first clamping member to move inward so that the first clamping member is released from the first clamping hole and is released from the clamping state with the mounting rod, at this time, the first telescopic rod can move upward relative to the mounting rod.

[0013] Furthermore, the first clamping member and the second clamping member are respectively provided with a first spring groove and a second spring groove, and the first spring groove and the second spring groove are respectively provided with a first clamping spring and a second clamping spring, and the two ends of the first clamping spring are respectively abutted against the bottom end of the first spring groove and the inner wall of the first bottom sleeve, and the two ends of the second clamping spring are respectively abutted against the bottom end of the second clamping spring and the inner wall of the second bottom sleeve.

[0014] Furthermore, a spring space is formed in the lifting handle, and a pressing hole is provided at the top of the lifting handle, which is connected to the spring space. The bottom end of the push switch is arranged in the spring space through the pressing hole. A fixing hole is provided at the bottom of the spring space, and the top end of the control rod is fixedly connected to the bottom end of the push switch through the fixing hole. A pressing spring is provided in the spring space, and the pressing spring is sleeved on the control rod. An abutting groove is provided at the bottom of the push switch, and both ends of the press spring are respectively abutted against the bottom of the abutting groove and the inner wall of the spring space.

[0015] Furthermore, a mounting groove is provided on the top of the box body, the connecting part is placed in the mounting groove, a cushion plate is extended from the connecting part, the cushion plate is arranged in the mounting groove, and an inner concave surface is formed on the cushion plate.

[0016] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0017] A new type of trolley case, comprising a drawbar arranged at the upper end of the case and a rolling wheel arranged at the lower end of the case, a connecting part is arranged on the case, a supporting assembly is arranged on the back of the case, the top end of the supporting assembly is rotatably connected to the connecting part, the supporting assembly can be rotated relative to the connecting part, the supporting assembly comprises a bracket and a supporting wheel, a rotating part is arranged at the top end of the bracket, the rotating part is rotatably connected to the connecting part, the supporting wheel is arranged at the bottom end of the bracket, a limit assembly and a control switch connected to the limit assembly are movably arranged in the connecting part, controlling the control switch can drive the limit assembly to move, the limit assembly can be engaged with the rotating part to limit the bracket from rotating, and controlling the control switch drives the limit assembly to move. The component moves and the rotating part is released from the clamping state, and the bracket can be rotated relative to the connecting part; the pull rod at the upper end of the box allows the user to tilt the box by pulling the pull rod, and the rolling wheel at the lower end of the box allows the user to move the box by pulling the pull rod, which is convenient for the user to pull the box to move, and the support component on the back of the box includes a bracket and a support wheel, the bracket is rotatably connected to the connecting part on the box through the rotating part at the top, so that the bracket can be smoothly rotated and unfolded relative to the connecting part, and there is a support wheel at the bottom of the bracket. When the bracket is rotated and unfolded, when the user tilts and pulls the box, the support wheel at the bottom of the bracket will contact the ground, so that part of the gravity of the box can be dispersed to the bracket, thereby reducing the pressure on the user's arm. The support wheel is provided so that when the user pulls the box, the support wheel can rotate together with the rolling wheel, so as to facilitate the user to pull the box. Compared with the trolley case with a support assembly on the market, the structure of the support assembly is complicated, and the user cannot quickly unfold or store the support assembly, which is inconvenient for the user to operate. A limit assembly is movable in the connecting part of the utility model. When the limit assembly is engaged with the rotating part, the rotating part cannot rotate relative to the connecting part, so that the bracket cannot be unfolded, so as to avoid the situation that the bracket automatically unfolds and affects the normal use of the user when the user does not need to use the bracket. In addition, a control switch connected to the limit assembly is movable in the connecting part. When the user tilts and pulls the box, The limit assembly can be driven to move laterally by sliding the control switch with a finger, so that the limit assembly and the rotating part are released from the engaged state, and the rotating part can be rotated relative to the connecting part. After the user slides the control switch, the bracket can be pried outward to make the bracket rotate relative to the connecting part through the rotating part, so that the bracket can be smoothly unfolded. When the user needs to store the trolley case, the user can pry the bracket toward the box body, so that the limit assembly and the rotating part at the top of the bracket can be re-engaged. At this time, the bracket is completely stored, which reduces the overall volume of the trolley case and facilitates the storage of the trolley case. Moreover, this unfolding and storage method is simple, fast and convenient to operate, can save time for users, and is conducive to users using the trolley case. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a stereogram of the utility model.

[0019] Figure 2 It is a stereogram of the utility model.

[0020] Figure 3 It is a reference diagram of the use status of the utility model.

[0021] Figure 4 It is an exploded view of the box body, the supporting assembly and the mounting frame of the utility model.

[0022] Figure 5 It is an exploded view of the box body, the supporting assembly and the mounting frame of the utility model.

[0023] Figure 6 It is a three-dimensional diagram of the box body of the utility model.

[0024] Figure 7 It is an exploded view of the support assembly and the mounting frame of the utility model.

[0025] Figure 8 It is an exploded view of the rotating part and the connecting part of the utility model.

[0026] Fig. 9 It is an exploded view of the limit assembly and the rotating part of the utility model.

[0027] Fig.10 It is a structural schematic diagram of the limit assembly and the rotating part of the utility model.

[0028] Fig.11 It is a structural schematic diagram of the connecting part of the utility model.

[0029] Fig.12 It is a stereoscopic diagram of the limit rod, the return spring and the control switch of the utility model.

[0030] Fig.13 It is a stereoscopic diagram of the mounting rod, the second telescopic rod and the first telescopic rod of the utility model.

[0031] Fig.14 It is a cross-sectional view of the mounting rod, the second telescopic rod and the first telescopic rod of the utility model.

[0032] Fig.15 yes Fig.14 A partial enlarged view of point A in the middle.

[0033] Fig.16 yes Fig.14 A partial enlarged view of point B in the middle.

[0034] Fig.17 yes Fig.14 A partial enlarged view of point C in the middle.

[0035] Fig.18It is an exploded view of the installation rod, the second telescopic rod and the first telescopic rod of the utility model.

[0036] Fig.19 It is an exploded view of the first telescopic rod and the second telescopic rod of the utility model.

[0037] Fig. 20 It is an exploded view of the second bottom sleeve, the second driving member and the second clamping member of the utility model.

[0038] Fig.21 It is an exploded view of the first bottom sleeve, the first driving member and the first clamping member of the utility model.

[0039] Fig. 22 It is an exploded view of the installation rod and the fixing block of the utility model.

[0040] Fig.23 It is an exploded view of the fixed block, the push spring and the limit block of the utility model.

[0041] Fig.24 It is a cross-sectional view of the box body and the mounting rod of the utility model.

[0042] Fig.25 yes Fig.24 A partial enlarged view of point D in the middle.

[0043] The meanings of the numbers in the figure are as follows: 1-box; 2-pull rod; 3-rolling wheel; 4-connecting part; 5-bracket; 6-support wheel; 8-control switch; 9-rotation space; 10-first rotation channel; 11-second rotation channel; 12-first support rod; 13-second support rod; 14-base frame; 15-first rotating member; 16-second rotating member; 17-limiting hole; 18-limiting rod; 19-first clamping groove; 20-second clamping groove; 21-sliding hole; 22-reset spring; 23-step part; 25-linking groove;

[0044] 26-linking rod; 27-rotating hole; 28-connecting hole; 29-connecting rod; 30-storage slot; 31-mounting frame; 32-load-bearing rod; 33-mounting rod; 34-mounting block; 35-mounting hole; 36-sliding rod; 37-bump; 38-support block; 39-fixing block; 40-clamping block; 41-control slot; 42-sliding slot; 43-sliding slot; 44-rod hole; 45-clamping slot; 46-clamping part; 47-first inclined plane; 48-second inclined plane; 49-limiting block; 50-pushing spring; 51-first telescopic rod; 52-second telescopic rod; 53-lifting handle; 54-second bottom sleeve; 55-second driving member; 56-second clamping member; 57-second abutting inclined plane;

[0045] 58-second driving inclined surface; 59-second clamping hole; 60-control rod; 61-press switch; 62-handlebar handle; 63-first bottom sleeve; 64-first driving member;

[0046] 65 - first clamping member; 66 - first abutting inclined surface; 67 - first driving inclined surface; 68 - first clamping hole; 71 - first clamping spring; 72 - second clamping spring;

[0047] 73 - spring space; 75 - fixing hole; 76 - compression spring; 77 - abutment groove; 78 - mounting groove; 79 - cushion plate. DETAILED DESCRIPTION

[0048] The utility model is further described below in conjunction with specific embodiments:

[0049] A novel trolley case, comprising a case body 1, a trolley 2 arranged at the upper end of the case body 1, and a rolling wheel 3 arranged at the lower end of the case body 1, a connecting portion 4 is arranged on the case body 1, a supporting assembly is arranged on the back of the case body 1, the top end of the supporting assembly is rotatably connected to the connecting portion 4, the supporting assembly can rotate relative to the connecting portion 4, the supporting assembly comprises a bracket 5 and a supporting wheel 6, the top end of the bracket 5 is provided with a rotating member, the rotating member is rotatably connected to the connecting portion 4, the supporting wheel 6 is arranged at the bottom end of the bracket 5, a limit assembly and a control switch 8 connected to the limit assembly are movably arranged in the connecting portion 4, the control switch 8 can be controlled to drive the limit assembly to move, the limit assembly can be engaged with the rotating member to limit the bracket 5 from rotating, the control switch 8 is controlled to drive the limit assembly to move and release the engaged state with the rotating member, at this time the bracket 5 can rotate relative to the connecting portion 4;The pull rod 2 at the upper end of the box body 1 allows the user to tilt the box body 1 by pulling the pull rod 2, and the rolling wheel 3 at the lower end of the box body 1 allows the user to move the box body 1 by pulling the pull rod 2, which is convenient for the user to pull the box body 1 to move, and the support assembly on the back of the box body 1 includes a bracket 5 and a support wheel 6, and the bracket 5 is rotatably connected to the connecting part 4 on the box body 1 through the rotating member at the top, so that the bracket 5 can be smoothly rotated and unfolded relative to the connecting part 4, and the bottom of the bracket 5 is provided with a support wheel 6. When the bracket 5 is rotated and unfolded, when the user tilts and pulls the box body 1, the bracket 5 The support wheels 6 at the bottom of the frame 5 will contact the ground, so that part of the gravity of the box body 1 can be dispersed to the bracket 5, thereby reducing the weight borne by the user's arm, and the setting of the support wheels 6 enables the support wheels 6 to rotate together with the rolling wheels 3 when the user pulls the box body 1, so as to facilitate the user to pull the box body 1. Compared with the trolley case with a support assembly on the market, the structure of the support assembly is complicated, and the user cannot quickly unfold or store the support assembly, which is inconvenient for the user to operate. The movable limit assembly in the connecting part 4 of the utility model When the bracket 5 is engaged with the rotating member, the rotating member cannot rotate relative to the connecting part 4, so that the bracket 5 cannot be unfolded, so as to avoid the situation that the bracket 5 automatically unfolds and affects the normal use of the user when the user does not need to use the bracket 5. In addition, a control switch 8 connected to the limit assembly is movable in the connecting part 4. When the user tilts and pulls the box body 1, the limit assembly can be driven to move horizontally by sliding the control switch 8 with a finger, so that the limit assembly and the rotating member are released from the engaging state. At this time, the rotating member can rotate relative to the connecting part 4. After the user slides the control switch 8, the bracket 5 can be bent outward, so that the bracket 5 rotates relative to the connecting part 4 through the rotating member, so that the bracket 5 can be smoothly unfolded. When the user needs to store the trolley case, the user can bend the bracket 5 toward the box body 1, so that the limit assembly and the rotating member at the top of the bracket 5 re-enter the engaging state. At this time, the bracket 5 is completely stored, so that the overall volume of the trolley case is reduced, which is convenient for the storage of the trolley case. Moreover, this unfolding and storage method is simple, fast and convenient to operate, which can save time for users and is conducive to the use of the trolley case by users. ;

[0050] Preferably, a rotation space 9 is formed on both sides of the connecting portion 4, and the inner walls of the rotation spaces 9 on both sides are respectively provided with a first rotation channel 10 and a second rotation channel 11, the bracket 5 includes a first support rod 12, a second support rod 13 and a base frame 14, the bottom ends of the first support rod 12 and the second support rod 13 are connected to the base frame 14, the support wheels 6 are respectively arranged at both ends of the base frame 14, the rotating member includes a first rotating member 15 and a second rotating member 16, the first rotating member 15 and the second rotating member 16 are respectively arranged at the top ends of the first support rod 12 and the second support rod 13, the first rotating member 15 and the second rotating member 16 are respectively passed through the first rotation channel 10 and the second rotation channel 11 and are arranged in the rotation spaces 9 on both sides of the connecting portion 4 and are rotatably connected to the connecting portion 4, and the connecting portion 4 is provided with a first support rod 12, a second support rod 13 and a base frame 14, the support wheels 6 are respectively arranged at both ends of the base frame 14, the rotating member includes a first rotating member 15 and a second rotating member 16, the first rotating member 15 and the second rotating member 16 are respectively arranged at the top ends of the first support rod 12 and the second support rod 13, the first rotating member 15 and the second rotating member 16 are respectively arranged in the rotation spaces 9 on both sides of the connecting portion 4 through the first rotation channel 10 and the second rotation channel 11 There is a limiting hole 17 connecting the two rotation spaces 9, the limiting assembly is arranged in the limiting hole 17, the limiting assembly includes a limiting rod 18, the inner side of the second rotating member 16 is provided with a first clamping groove 19 and a second clamping groove 20, one end of the limiting rod 18 is exposed in the rotation space 9 and is arranged in the first clamping groove 19 to be clamped with the second rotating member 16, a sliding hole 21 is opened on the connecting portion 4, the control switch 8 is slidably arranged in the sliding hole 21, the sliding hole 21 is connected with the limiting hole 17, the bottom of the control switch 8 is arranged in the limiting hole 17 and connected with the limiting rod 18, sliding the control switch 8 can drive the limiting rod 18 to move horizontally and then disengage from the first clamping groove 19, at this time, the first rotating member 15 and the second rotating member 16 can rotate relative to the connecting portion 4;The bottom ends of the first rotating member 15 and the second rotating member 16 are connected to the bottom frame 14, so that the overall firmness of the bracket 5 is improved and it is not easy to be damaged. The number of the supporting wheels 6 is two and they are respectively arranged at the two ends of the bottom frame 14, so that the user can pull the trolley case more labor-saving. Since the first rotating member 15 at the top of the first support rod 12 and the second rotating member 16 at the top of the second support rod 13 pass through the first rotating channel 10 and the second rotating channel 11 respectively, they are arranged in the rotating space 9 on both sides of the connecting part 4 and are rotatably connected to the connecting part 4. The arrangement of the first rotating channel 10 and the second rotating channel 11 makes the first rotating member 15 and the second rotating member 16 rotate in the rotating space 9 on both sides of the connecting part 4. The second rotating member 16 can smoothly enter the rotating space 9 on both sides of the connecting portion 4, and the first support rod 12 and the second support rod 13 can be rotated along the first rotating groove 10 and the second rotating groove 11 respectively, so that the bracket 5 can be smoothly deployed and used, and the limiting rod 18 is arranged in the limiting hole 17 of the connecting portion 4, and the limiting hole 17 is respectively connected to the rotating space 9 on both sides of the connecting portion 4, so that one end of the limiting rod 18 can be smoothly exposed in the rotating space 9, and the inner side surface of the second rotating member 16 has a first clamping groove 19 and a second clamping groove 20, and the connecting portion 4 is connected to the first clamping groove 19 and the second clamping groove 20. The end is arranged in the first engaging groove 19 on the second rotating member 16 and is engaged with the second rotating member 16, thereby limiting the rotation of the second rotating member 16. The second rotating member 16 cannot rotate, resulting in the bracket 5 being unable to rotate as a whole. However, since the control switch 8 is slidably arranged in the sliding hole 21 on the connecting portion 4, and the sliding hole 21 is connected to the limiting hole 17, the bottom of the control switch 8 can be connected to the limiting rod 18 in the limiting hole 17. When the user wants to unfold the bracket 5, the user can slide the control switch 8 along the sliding hole 21, so that the control switch 8 drives the limiting rod 18 to move inward. One end of the limit rod 18 is disengaged from the first engaging groove 19, and the second rotating member 16 and the connecting portion 4 are released from the engaging state, and the second rotating member 16 can rotate relative to the connecting portion 4, so that the bracket 5 can rotate as a whole, so that the bracket 5 can be smoothly unfolded. When the bracket 5 is rotated outward to a certain angle, one end of the limit rod 18 enters the second engaging groove 20, so that the second rotating member 16 and the connecting portion 4 enter the engaging state, so that after the bracket 5 is unfolded, the bracket 5 will not rotate at will when the user pulls the suitcase to move, and will not affect the normal use of the user. ;

[0051] Preferably, the limit assembly also includes a return spring 22, the limit rod 18 is provided with a step portion 23, the return spring 22 is sleeved on the other end of the limit rod 18, and the two ends of the return spring 22 are respectively in contact with the step portion 23 and the inner side surface of the first rotating member 15; when the user drives the limit rod 18 to move inwardly by controlling the switch 8, the other end of the limit rod 18 will cause the return spring 22 to enter a compressed state. After compression, most of the return spring 22 is arranged in the limit hole 17, and only a small part is exposed from the limit hole 17 and abuts against the inner side surface of the first rotating member 15. When the bracket 5 rotates relative to the connecting portion 4, the return spring 22 will not be dislocated and disengaged from the limit hole 17, and when the bracket 5 rotates to a certain angle, at this time, one end of the limit rod 18 corresponds to the position of the second clamping groove 20, and the compressed return spring 22 will push the limit rod 18 to move outward along the limit hole 17. The setting of the reset spring 22 enables the user to conveniently unfold and store the bracket 5 without manually controlling the limit rod 18 to enter the second clamping groove 20 or the first clamping groove 19.

[0052] Preferably, the first rotating member 15 and the second rotating member 16 are both provided with a linkage hole, the connecting portion 4 is provided with a linkage groove 25, and a linkage rod 26 is provided in the linkage groove 25, and two ends of the linkage rod 26 respectively pass through the rotation spaces 9 on both sides of the connecting portion 4 and are arranged in the linkage holes of the first rotating member 15 and the second rotating member 16 to be connected with the first rotating member 15 and the second rotating member 16, and a rotation hole 27 is provided on the first rotating member 15 and the second rotating member 16, and a connecting hole 28 is provided on the connecting portion 4, and a connecting rod 29 is provided in the connecting hole 28 and the rotating hole 27; since the linkage rod 26 is provided in the linkage groove 25 of the connecting portion 4, and the two ends of the linkage rod 26 respectively pass through the rotation spaces 9 on both sides of the connecting portion 4 and are arranged in the linkage holes of the first rotating member 15 and the second rotating member 16 The first rotating member 15 and the second rotating member 16 are connected in the movable hole. When the second rotating member 16 cannot rotate, the first rotating member 15 cannot rotate independently. When the second rotating member 16 can rotate, the first rotating member 15 and the second rotating member 16 can rotate synchronously. Since the bracket 5 will drive the linkage rod 26 to rotate together after the bracket 5 rotates, the setting of the linkage groove 25 enables the linkage rod 26 to rotate smoothly along the linkage groove 25 after the bracket 5 rotates, so that the bracket 5 can be smoothly unfolded, and the first rotating member 15 and the second rotating member 16 are rotatably connected to the connecting part 4 through the connecting hole 28 and the connecting rod 29 in the rotating hole 27. The setting of the connecting rod 29 makes the rotational connection between the first rotating member 15, the second rotating member 16 and the connecting part 4 more stable and firm.

[0053] Preferably, a storage groove 30 is provided on the back of the box body 1, and the bracket 5 can be rotated into the storage groove 30 relative to the connecting portion 4. A mounting frame 31 is provided in the storage groove 30, and the box body 1 is installed on the mounting frame 31. The mounting frame 31 includes a load-bearing rod 32 and a mounting rod 33. The rolling wheels 3 are respectively arranged at both ends of the load-bearing rod 32. The storage groove 30 is symmetrically provided with mounting blocks 34. The mounting rod 33 is arranged between the symmetrical mounting blocks 34. The mounting blocks 34 are all in contact with the upper surface of the load-bearing rod 32. The connecting portion 4 is provided with a mounting hole 35 that passes through the connecting portion 4. The mounting rod The top of 33 is arranged in the mounting hole 35 and connected with the connecting part 4, and the connecting part 4 can be detachably mounted on the box body 1. The mounting rod 33 is provided with a clamping assembly and a sliding rod 36 for controlling the upward and downward movement of the clamping assembly. A protrusion 37 is provided between the symmetrical mounting blocks 34, and the protrusion 37 passes through the mounting rod 33 and is clamped with the clamping assembly. A supporting block 38 is provided at the bottom of the box body 1. The sliding rod 36 can be controlled to drive the clamping assembly to move downward and release the clamping state with the protrusion 37. At this time, the box body 1 can be removed from the mounting bracket 31; the arrangement of the storage slot 30 enables the bracket 5 to smoothly enter the back of the box body 1 after rotating inward. The storage groove 30 of the luggage case can be made smaller, which is convenient for storage and improves the overall aesthetics of the luggage case. The box body 1 is connected to the mounting rod 33 by the protrusion 37 passing through the mounting rod 33 and being clamped with the clamping assembly in the mounting rod 33. Since the symmetrical mounting blocks 34 on the box body 1 abut against the upper surface of the load-bearing rod 32, the box body 1 can be stably installed on the mounting frame 31. Since there is a support block 38 at the bottom of the box body 1, when the user puts the luggage case in a vertical state with the ground, the support block 38 will contact the ground, so that the box body 1 will not fall off the mounting frame 31. When the user wants to put the box body 1 When dismantling from the mounting frame 31, the sliding rod 36 can be used to control the clamping assembly to move downward, and the clamping assembly will be released from the clamping state with the protrusion 37 on the box body 1, so that the protrusion 37 can be disengaged from the mounting rod 33. Since the top end of the mounting rod 33 is arranged in the mounting hole 35 of the connecting part 4 and is fixedly connected to the connecting part 4, and the connecting part 4 is detachably mounted on the box body 1, the user can separate the connecting part 4 from the box body 1, so that the box body 1 can be smoothly dismantled from the mounting frame 31, which is convenient for the user to place the luggage in the box body 1 or to replace the box body 1 when it is damaged, thereby improving the practicality of the trolley case.

[0054] Preferably, the clamping assembly includes a fixed block 39 and a clamping block 40, the fixed block 39 is provided with a control groove 41, the clamping block 40 is movably arranged in the control groove 41, the side wall of the control groove 41 is provided with a sliding groove 42, the mounting rod 33 is provided with a sliding groove 43, the sliding rod 36 is fixedly connected to the clamping block 40, one end of the sliding rod 36 passes through the sliding groove 42 and the sliding groove 43 and is arranged outside the mounting rod 33, the mounting rod 33 is also provided with a rod hole 44, one end of the protrusion 37 passes through the rod hole 44 and is arranged in the mounting rod 33, the bottom of the protrusion 37 A snap groove 45 is provided, and a snap portion 46 is formed on the top of the snap block 40, and the snap portion 46 is arranged in the snap groove 45 and snapped with the protrusion 37, and a first inclined surface 47 is formed on the snap portion 46, and a second inclined surface 48 adapted to the first inclined surface 47 is formed on the protrusion 37, and a limit block 49 is extended to form at the bottom of the snap block 40, and a push spring 50 is provided in the control groove 41, and the top end of the push spring 50 is sleeved on the limit block 49 and abuts against the bottom of the snap block 40, and the bottom end of the push spring 50 abuts against the bottom of the control groove 41;The rod hole 44 on the mounting rod 33 allows the protrusion 37 on the box body 1 to smoothly enter the mounting rod 33 and be engaged with the clamping block 40, and the protrusion 37 is arranged in the clamping groove 45 at the bottom of the protrusion 37 through the clamping portion 46 at the top of the clamping block 40 to be engaged with the clamping block 40. Since the clamping block 40 is movably arranged in the control groove 41 of the fixed block 39, it can effectively prevent the clamping block 40 from moving freely in the mounting rod 33, and the sliding rod 36 is fixedly connected to the clamping block 40, and one end of the sliding rod 36 passes through the sliding groove 42 on the side wall of the control groove 41 and the mounting rod 33. The slide groove 43 on the mounting rod 33 is arranged outside the mounting rod 33. The user only needs to press the sliding rod 36 arranged outside the mounting rod 33 to make the sliding rod 36 move downward along the sliding groove 42 and the slide groove 43, so as to drive the clamping block 40 to move downward, so that the buckle portion 46 at the top of the clamping block 40 is disengaged from the buckle groove 45 at the bottom of the protrusion 37 and the clamping state of the protrusion 37 is released. At this time, the protrusion 37 can be disengaged from the rod hole 44 on the mounting rod 33, so that the box body 1 is disassembled from the mounting bracket 31, and the top end of the push spring 50 is sleeved on the limit block 49 at the bottom of the clamping block 40 and is in contact with the clamping block 40. The bottom of the connecting block 40 is in contact with each other, which can prevent the push spring 50 from moving out of the control groove 41 at will, and the bottom end of the push spring 50 is in contact with the bottom of the control groove 41. After the user drives the clamping block 40 downward through the sliding rod 36, the push spring 50 will enter a compressed state. When the box body 1 is removed from the mounting bracket 31, the user releases the sliding rod 36. At this time, the compressed push spring 50 will push the clamping block 40 and the sliding rod 36 to reset. When the user wants to reinstall the box body 1 on the mounting bracket 31, due to the first The second inclined surface 48 is matched with the first inclined surface 47 on the buckle part 46. The user only needs to align the protrusion 37 with the rod hole 44 and insert it. At this time, the protrusion 37 will push the buckle part 46 to move downward through the second inclined surface 48, so that the push spring 50 is in a compressed state. When the buckle part 46 is located below the buckle groove 45, the compressed push spring 50 will push the clamping block 40 to move upward, so that the buckle part 46 at the top of the clamping block 40 can automatically enter the buckle groove 45 again and be clamped with the buckle part 46, thereby completing the installation of the box body 1, so that the box body 1 can be normally installed on the mounting frame 31. ;

[0055] Preferably, the pull rod 2 includes a first telescopic rod 51 slidably arranged in the mounting rod 33 and a second telescopic rod 52 slidably arranged in the first telescopic rod 51, the top end of the second telescopic rod 52 is exposed outside the second telescopic rod 52, the top end of the second telescopic rod 52 is provided with a lifting handle 53, the bottom end of the second telescopic rod 52 is provided with a second bottom sleeve 54, a second driving member 55 and a second clamping member 56 are movably provided in the second bottom sleeve 54, a second abutting inclined surface 57 is formed on the second clamping member 56, and a second driving inclined surface 58 matched with the second abutting inclined surface 57 is formed on the bottom of the second driving member 55, a plurality of second clamping holes 59 are opened on the first telescopic rod 51, one end of the second clamping member 56 passes through the second bottom sleeve 54 and is arranged in the second clamping member The second telescopic rod 52 is provided with a control rod 60, and the bottom end of the control rod 60 is connected with the top end of the second driving member 55. A pressing switch 61 is movably provided on the lifting handle 53, and the top end of the control rod 60 passes through the lifting handle 53 and is connected with the pressing switch 61. Pressing the pressing switch 61 can drive the control rod 60 to move downward, and the control rod 60 pushes the second driving member 55 to move downward. The second driving member 55 pushes the second clamping member 56 to move inward so that the second clamping member 56 is disengaged from the second clamping hole 59 and the first telescopic rod 51 to release the clamping state. At this time, the second telescopic rod 52 can move upward relative to the first telescopic rod 51.

[0056] The top end of the first telescopic rod 51 is exposed outside the mounting rod 33, and a handrail handle 62 is provided at the top end of the first telescopic rod 51, and a first bottom sleeve 63 is provided at the bottom end of the first telescopic rod 51, and a first driving member 64 and a first clamping member 65 are movably provided in the first bottom sleeve 63, and a first abutting inclined surface 66 is formed on the first clamping member 65, and a first driving inclined surface 67 adapted to the first abutting inclined surface 66 is formed at the bottom of the first driving member 64, and a plurality of first clamping holes 68 are provided on the mounting rod 33, and one end of the first clamping member 65 passes through the first bottom sleeve 63 and is arranged in the first clamping hole 68 to be clamped with the mounting rod 33, and the top end of the first driving member 64 passes through the first bottom sleeve 63 and is arranged In the first telescopic rod 51, the second bottom sleeve 54 is located above the first driving member 64 and abuts against the top end of the first driving member 64. After the second clamping member 56 is released from the clamping state with the first telescopic rod 51, the second telescopic rod 52 is driven to move downward. At this time, the second bottom sleeve 54 drives the first driving member 64 to move downward, and the first driving member 64 pushes the first clamping member 65 to move inward so that the first clamping member 65 is disengaged from the first clamping hole 68 and is released from the clamping state with the mounting rod 33. At this time, the first telescopic rod 51 can move upward relative to the mounting rod 33. The setting of the lifting handle 53 allows the user to pull the box body 1 to move by pulling the lifting handle 53, so that the user can save effort. Therefore, when the first telescopic rod 51 is extended, since the bottom end of the control rod 60 is connected to the top end of the second driving member 55, the top end of the control rod 60 passes through the lifting handle 53 and is connected to the push switch 61 on the lifting handle 53, the user can drive the control rod 60 to move downward by pressing the control switch 8, and the second driving member 55 and the second clamping member 56 are movably arranged in the second bottom sleeve 54, and the top end of the second driving member 55 passes through the second bottom sleeve 54 and is arranged in the second telescopic rod 52 and is connected to the bottom end of the control rod 60. When the control rod 60 moves downward, it will push the second driving member 55 to move downward. Since the second driving inclined surface 58 on the second driving member 55 and the second abutting inclined surface 57 on the second clamping member 56 The second clamping hole 59 on the first telescopic rod 51 is released from the clamping state with the first telescopic rod 51. At this time, the user can pull the second telescopic rod 52 upward by pulling the handle 53, so that it is convenient for the user to pull the box body 1. The number of the second clamping holes 59 of the utility model is three, and the three second clamping holes 59 are distributed on the first telescopic rod 51 from high to low. When the second telescopic rod 52 moves upward after a moving distance, it will re-enter the new second clamping hole 59 and enter the clamping state with the first telescopic rod 51, thereby preventing the user from passing through the second telescopic rod 52.

[0057] When the box body 1 is pulled to move, the second telescopic rod 52 is completely separated from the first telescopic rod 51, which affects the normal use of the suitcase. The second clamping holes 59 at different positions represent the distance that the second telescopic rod 52 moves upward along the first telescopic rod 51, so that the user can choose the length of the second telescopic rod 52 according to their actual needs. The setting of the handle 62 at the top of the first telescopic rod 51 allows the user to rotate the bracket 5 out of the storage slot 30 when traveling with children, and then place the child on the top of the box body 1, so that the user does not need to hold the child for a long time, which makes it easier and more labor-saving for the user. The maximum weight bearing capacity of the suitcase is greatly increased, and the suitcase will not be damaged after placing a child in the suitcase body 1, and the first telescopic rod 51 is movably arranged in the mounting rod 33, so that the first telescopic rod 51 can move upward relative to the mounting rod 33, and the setting of the handrail handle 62 at the top of the first telescopic rod 51 allows the user to pull the first telescopic rod 51 upward after placing the child on the top of the suitcase body 1, so that the child can grab the handrail handle 62 with his hand to prevent the child from falling to the ground and getting injured, and when the user wants to extend the first telescopic rod 51 from the mounting rod 33, the user can first press the push switch 61 to make the second clamping member 56 and the first clamping member 56 engage with each other. After the telescopic rod 51 is released from the clamping state, the second telescopic rod 52 can move downward. The user only needs to continue pressing the control switch 8 to drive the second telescopic rod 52 to move downward as a whole. Since the top end of the first driving member 64 passes through the first bottom sleeve 63 and is arranged in the first telescopic rod 51, and the second bottom sleeve 54 is located above the first driving member 64 and abuts against the top end of the first driving member 64, when the second telescopic rod 52 moves downward, the second bottom sleeve 54 at the bottom end of the second telescopic rod 52 will push the first driving member 64 to move downward, and since the first driving inclined surface 67 at the bottom of the first driving member 64 is adapted to the first abutting inclined surface 66 on the first clamping member 65, when the second telescopic rod 52 moves downward, After a driving member 64 moves downward, it will push the first clamping member 65 to move inward to disengage from the first clamping hole 68 on the mounting rod 33 and release the clamping state from the mounting rod 33. At this time, the user pulls the first telescopic rod 51 upward through the handrail handle 62. Since there are two first clamping holes 68, when the first telescopic rod 51 moves upward a certain distance, the first clamping member 65 will enter the first clamping hole 68 with a higher height, so that the first telescopic rod 51 and the mounting rod 33 are re-engaged, avoiding the situation where the first telescopic rod 51 automatically retreats into the mounting rod 33 after the child holds the handrail handle 62, which may cause the child to lose balance and fall to the ground.

[0058] Preferably, the first clamping member 65 and the second clamping member 56 are respectively provided with a first spring groove and a second spring groove, and the first spring groove and the second spring groove are respectively provided with a first clamping spring 71 and a second clamping spring 72, two ends of the first clamping spring 71 respectively abut against the bottom end of the first spring groove and the inner wall of the first bottom sleeve 63, and two ends of the second clamping spring 72 respectively abut against the bottom end of the second clamping spring 72 and the inner wall of the second bottom sleeve 54; when the first clamping member 65 moves inwardly and releases the clamping state with the mounting rod 33, the first clamping spring 71 will enter a compressed state, and when the first telescopic rod 51 moves upward, the first clamping spring 71 will remain in a compressed state, and when one end of the first clamping member 65 corresponds to the position of the new first clamping hole 68, the compressed first clamping spring 71 will push the first clamping member 65 to move outward, so that one end of the first clamping member 65 can automatically enter the new first clamping hole 68 and re-enter the mounting rod 33 The second clamping member 56 is in the locked state, and the user does not need to manually control the first clamping member 65 to move outward, which can prevent the user from accidentally pulling the first telescopic rod 51 out of the mounting rod 33 when pulling the first telescopic rod 51 upward. When the second clamping member 56 moves inward, the clamping state with the first telescopic rod 51 is released. At this time, the second clamping spring 72 will enter a compressed state. When the second telescopic rod 52 moves upward, the second clamping spring 72 will remain in a compressed state. When one end of the second clamping member 56 corresponds to the position of the new second clamping hole 59, the compressed second clamping spring 72 will push the second clamping member 56 to move outward, so that one end of the second clamping member 56 can automatically enter the new second clamping hole 59 and re-enter the locked state with the second telescopic rod 52. There is no need for the user to manually control the second clamping member 56 to move outward. This can prevent the user from accidentally pulling the second telescopic rod 52 out of the first telescopic rod 51 when pulling the second telescopic rod 52 upward, which can reduce unnecessary trouble for the user.

[0059] Preferably, a spring space 73 is formed in the lifting handle 53, a pressing hole is provided at the top of the lifting handle 53, the pressing hole is communicated with the spring space 73, the bottom end of the push switch 61 is arranged in the spring space 73 through the pressing hole, a fixing hole 75 is provided at the bottom of the spring space 73, the top of the control rod 60 is fixedly connected with the bottom end of the push switch 61 through the fixing hole 75, a pressing spring 76 is provided in the spring space 73, the pressing spring 76 is sleeved on the control rod 60, an abutting groove 77 is provided at the bottom of the push switch 61, and the two ends of the pressing spring 76 are respectively abutted against the bottom of the abutting groove 77 and the inner wall of the spring space 73; since the pressing hole is provided at the top of the lifting handle 53 and the fixing hole 75 is provided at the bottom of the spring space 73, The top end of the control rod 60 can smoothly pass through the pressing hole and be connected to the bottom end of the pressing switch 61, so that the user can drive the control rod 60 to move downward by pressing the control switch 8, and the pressing spring 76 in the spring space 73 is sleeved on the top of the control rod 60, and the two ends of the pressing spring 76 are respectively abutted against the bottom of the abutting groove 77 and the inner wall of the spring space 73, which can prevent the pressing spring 76 from moving freely in the spring space 73. When the user presses the pressing switch 61, the pressing spring 76 will enter a compressed state. When the user pulls the second telescopic rod 52 or the first telescopic rod 51 to move upward, the compressed pressing spring 76 will move upward through the pressing switch 61, thereby resetting the pressing switch 61 to its original position, which will not affect the user's next pressing of the control switch 8.

[0060] Preferably, a mounting groove 78 is provided at the top of the box body 1, and the connecting portion 4 is placed in the mounting groove 78. A cushion plate 79 is extended and formed on the connecting portion 4, and the cushion plate 79 is arranged in the mounting groove 78, and an inner concave surface is formed on the cushion plate 79; since the connecting portion 4 is placed in the mounting groove 78 at the top of the box body 1, and there is no fixed connection relationship between the connecting portion 4 and the box body 1, when the user releases the engagement state between the protrusion 37 on the box body 1 and the buckle portion 46 at the top of the clamping block 40 through the sliding rod 36, the box body 1 can be removed from the mounting, and the operation is simple, fast and convenient. The cushion plate 79 on the connecting portion 4 is concave with an inner concave surface. When the user travels with children, there is no need to hold the child for a long time. The child can be placed on the cushion plate 79, which makes the user more relaxed and labor-saving, and the setting of the inner concave surface enables the child to sit on the cushion plate 79 more stably.

[0061] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel trolley case, comprising a case body (1), a trolley (2) arranged at the upper end of the case body (1), and a rolling wheel (3) arranged at the lower end of the case body (1), characterized in that: The box body (1) is provided with a connecting portion (4), and a supporting assembly is provided on the back of the box body (1). The top end of the supporting assembly is rotatably connected to the connecting portion (4), and the supporting assembly can rotate relative to the connecting portion (4). The supporting assembly comprises a bracket (5) and a supporting wheel (6). The top end of the bracket (5) is provided with a rotating member, and the rotating member is rotatably connected to the connecting portion (4). The supporting wheel (6) is arranged at the bottom end of the bracket (5). A limit assembly and a control switch (8) connected to the limit assembly are movably provided in the connecting portion (4). Controlling the control switch (8) can drive the limit assembly to move. The limit assembly can be engaged with the rotating member to limit the bracket (5) from rotating. Controlling the control switch (8) drives the limit assembly to move and release the engaged state with the rotating member. At this time, the bracket (5) can rotate relative to the connecting portion (4).

2. A new type of trolley case according to claim 1, characterized in that: The connecting portion (4) forms a rotation space (9) on both sides, and the inner walls of the rotation spaces (9) on both sides are respectively provided with a first rotation channel (10) and a second rotation channel (11); the bracket (5) comprises a first support rod (12), a second support rod (13) and a bottom frame (14); the bottom ends of the first support rod (12) and the second support rod (13) are connected to the bottom frame (14); the supporting wheels (6) are respectively arranged at both ends of the bottom frame (14); the rotating member comprises a first rotating member (15) and a second rotating member (16); the first rotating member (15) and the second rotating member (16) are respectively arranged at the top ends of the first support rod (12) and the second support rod (13); the first rotating member (15) and the second rotating member (16) respectively pass through the first rotation channel (10) and the second rotation channel (11) and are arranged in the rotation spaces (9) on both sides of the connecting portion (4) and are rotationally connected to the connecting portion (4); the connecting portion (4) is provided with a first rotation channel (10) and a second rotation channel (11) A limiting hole (17) is provided to connect the two rotation spaces (9). The limiting assembly is arranged in the limiting hole (17). The limiting assembly comprises a limiting rod (18). The inner side surface of the second rotating member (16) is provided with a first clamping groove (19) and a second clamping groove (20). One end of the limiting rod (18) is exposed in the rotation space (9) and is arranged in the first clamping groove (19) to be clamped with the second rotating member (16). A sliding hole (21) is provided on the connecting portion (4). The control switch (8) is slidably arranged in the sliding hole (21). The sliding hole (21) is connected with the limiting hole (17). The bottom of the control switch (8) is arranged in the limiting hole (17) and is connected with the limiting rod (18). Sliding the control switch (8) can drive the limiting rod (18) to move horizontally and then disengage from the first clamping groove (19). At this time, the first rotating member (15) and the second rotating member (16) can rotate relative to the connecting portion (4).

3. A new type of trolley case according to claim 2, characterized in that: The limit assembly also includes a return spring (22). The limit rod (18) is provided with a step portion (23). The return spring (22) is sleeved on the other end of the limit rod (18). The two ends of the return spring (22) are respectively in contact with the step portion (23) and the inner side surface of the first rotating member (15).

4. The novel trolley case according to claim 2 is characterized in that: The first rotating member (15) and the second rotating member (16) are both provided with linkage holes, the connecting portion (4) is provided with a linkage groove (25), the linkage groove (25) is provided with a linkage rod (26), the two ends of the linkage rod (26) respectively pass through the rotation spaces (9) on both sides of the connecting portion (4) and are arranged in the linkage holes of the first rotating member (15) and the second rotating member (16) to connect with the first rotating member (15) and the second rotating member (16), the first rotating member (15) and the second rotating member (16) are both provided with rotation holes (27), the connecting portion (4) is provided with a connection hole (28), and connection rods (29) are provided in the connection holes (28) and the rotation holes (27).

5. A new type of trolley case according to any one of claims 1 to 4, characterized in that: The back of the box (1) is provided with a storage groove (30), the bracket (5) can be rotated relative to the connecting portion (4) into the storage groove (30), a mounting frame (31) is provided in the storage groove (30), the box (1) is installed on the mounting frame (31), the mounting frame (31) comprises a load-bearing rod (32) and a mounting rod (33), the rolling wheels (3) are respectively arranged at two ends of the load-bearing rod (32), the storage groove (30) is symmetrically provided with mounting blocks (34), the mounting rod (33) is arranged between the symmetrical mounting blocks (34), the mounting blocks (34) are all in contact with the upper surface of the load-bearing rod (32), and the connecting portion (4) is provided with a through-connecting member (31). The mounting hole (35) of the part (4) is formed in the mounting hole (35), the top end of the mounting rod (33) is arranged in the mounting hole (35) and connected to the connecting part (4), the connecting part (4) is detachably mounted on the box body (1), a clamping assembly and a sliding rod (36) for controlling the clamping assembly to move up and down are arranged in the mounting rod (33), a convex block (37) is arranged between the symmetrical mounting blocks (34), the convex block (37) passes through the mounting rod (33) and is clamped with the clamping assembly, a supporting block (38) is arranged at the bottom of the box body (1), and the sliding rod (36) can be controlled to drive the clamping assembly to move downward to release the clamping state with the convex block (37), and the box body (1) can be removed from the mounting frame (31).

6. The novel trolley case according to claim 5 is characterized in that: The clamping assembly comprises a fixed block (39) and a clamping block (40), the fixed block (39) is provided with a control groove (41), the clamping block (40) is movably arranged in the control groove (41), the side wall of the control groove (41) is provided with a sliding groove (42), the mounting rod (33) is provided with a sliding groove (43), the sliding rod (36) is fixedly connected to the clamping block (40), one end of the sliding rod (36) passes through the sliding groove (42) and the sliding groove (43) and is arranged outside the mounting rod (33), the mounting rod (33) is also provided with a rod hole (44), one end of the protrusion (37) passes through the rod hole (44) and is arranged in the mounting rod (33), and the bottom of the protrusion (37) A snap groove (45) is provided, and a snap portion (46) is formed on the top end of the snap block (40), and the snap portion (46) is arranged in the snap groove (45) and snapped with the protrusion (37), and a first inclined surface (47) is formed on the snap portion (46), and a second inclined surface (48) adapted to the first inclined surface (47) is formed on the protrusion (37), and a limit block (49) is extended to form at the bottom of the snap block (40), and a push spring (50) is provided in the control groove (41), and the top end of the push spring (50) is sleeved on the limit block (49) and abuts against the bottom of the snap block (40), and the bottom end of the push spring (50) abuts against the bottom of the control groove (41).

7. The novel trolley case according to claim 6 is characterized in that: The pull rod (2) comprises a first telescopic rod (51) slidably arranged in the mounting rod (33) and a second telescopic rod (52) slidably arranged in the first telescopic rod (51), the top end of the second telescopic rod (52) is exposed outside the second telescopic rod (52), the top end of the second telescopic rod (52) is provided with a lifting handle (53), the bottom end of the second telescopic rod (52) is provided with a second bottom sleeve (54), a second driving member (55) and a second clamping member (56) are movably arranged in the second bottom sleeve (54), a second abutting inclined surface (57) is formed on the second clamping member (56), and a second driving inclined surface (58) matched with the second abutting inclined surface (57) is formed at the bottom of the second driving member (55), a plurality of second clamping holes (59) are opened on the first telescopic rod (51), one end of the second clamping member (56) passes through the second bottom sleeve (54) and is arranged in the second clamping hole (59) ) is clamped with the first telescopic rod (51), the top end of the second driving member (55) passes through the second bottom sleeve (54) and is arranged in the second telescopic rod (52), a control rod (60) is arranged in the second telescopic rod (52), the bottom end of the control rod (60) is connected with the top end of the second driving member (55), a pressing switch (61) is movably provided on the pulling handle (53), the top end of the control rod (60) passes through the pulling handle (53) and is connected with the pressing switch (61), pressing the pressing switch (61) can drive the control rod (60) to move downward, the control rod (60) pushes the second driving member (55) to move downward, the second driving member (55) pushes the second clamping member (56) to move inward so that the second clamping member (56) is disengaged from the second clamping hole (59) and the clamping state with the first telescopic rod (51) is released, and at this time, the second telescopic rod (52) can move upward relative to the first telescopic rod (51); The top end of the first telescopic rod (51) is exposed outside the mounting rod (33), the top end of the first telescopic rod (51) is provided with a handrail handle (62), the bottom end of the first telescopic rod (51) is provided with a first bottom sleeve (63), a first driving member (64) and a first clamping member (65) are movably provided in the first bottom sleeve (63), a first abutting inclined surface (66) is formed on the first clamping member (65), a first driving inclined surface (67) matched with the first abutting inclined surface (66) is formed at the bottom of the first driving member (64), a plurality of first clamping holes (68) are provided on the mounting rod (33), one end of the first clamping member (65) passes through the first bottom sleeve (63) and is arranged in the first clamping hole (68) to be engaged with the mounting rod ( The first telescopic rod (51) is connected to the second telescopic rod (52) by the second bottom sleeve (54), the top end of the first driving member (64) passes through the first bottom sleeve (63) and is arranged in the first telescopic rod (51), the second bottom sleeve (54) is located above the first driving member (64) and abuts against the top end of the first driving member (64), after the second clamping member (56) and the first telescopic rod (51) are released from the clamping state, the second telescopic rod (52) is driven to move downward, at which time the second bottom sleeve (54) drives the first driving member (64) to move downward, the first driving member (64) pushes the first clamping member (65) to move inward so that the first clamping member (65) is disengaged from the first clamping hole (68) and the mounting rod (33) is released from the clamping state, at which time the first telescopic rod (51) can move upward relative to the mounting rod (33).

8. The novel trolley case according to claim 7 is characterized in that: The first clamping member (65) and the second clamping member (56) are respectively provided with a first spring groove and a second spring groove, and the first spring groove and the second spring groove are respectively provided with a first clamping spring (71) and a second clamping spring (72), and the two ends of the first clamping spring (71) are respectively abutted against the bottom end of the first spring groove and the inner wall of the first bottom sleeve (63), and the two ends of the second clamping spring (72) are respectively abutted against the bottom end of the second clamping spring (72) and the inner wall of the second bottom sleeve (54).

9. The novel trolley case according to claim 7, characterized in that: A spring space (73) is formed in the lifting handle (53), a pressing hole is provided at the top of the lifting handle (53), and the pressing hole is connected to the spring space (73); the bottom end of the pressing switch (61) is arranged in the spring space (73) through the pressing hole; a fixing hole (75) is provided at the bottom of the spring space (73); the top end of the control rod (60) is fixedly connected to the bottom end of the pressing switch (61) through the fixing hole (75); a pressing spring (76) is provided in the spring space (73), and the pressing spring (76) is sleeved on the control rod (60); a contact groove (77) is provided at the bottom of the pressing switch (61), and the two ends of the pressing spring (76) are respectively contacted with the bottom of the contact groove (77) and the inner wall of the spring space (73).

10. The novel trolley case according to claim 5, characterized in that: The top of the box body (1) is provided with a mounting groove (78), the connecting portion (4) is placed in the mounting groove (78), a cushion plate (79) is extended and formed on the connecting portion (4), the cushion plate (79) is arranged in the mounting groove (78), and a concave surface is formed inwardly on the cushion plate (79).

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