A trolley case with a shock-absorbing structure and a separated middle frame and rotating shaft

Abstract

The present invention provides a trolley case with a shock-absorbing structure and a middle frame with a rotating shaft, comprising a pull rod, a rear shell, a middle frame structure, and a front shell. The middle frame structure includes a rotating shaft structure and a pair of middle frames, one of which is connected to the rear shell, and the other is connected to the front shell. The invention is characterized in that the rotating shaft structure includes a pair of rotating shafts and a core shaft, one of which is snap-connected to one middle frame, and the other is snap-connected to the other middle frame. The pair of rotating shafts are movably connected via the core shaft, and the pair of middle frames are locked together via an interlocking lock assembly. Shock-absorbing wheels are provided at the four corners of the bottom of the trolley case. The trolley case with a shock-absorbing structure and a middle frame with a rotating shaft provided by the present invention is not easily deformed, is smoother when pulled and walked, reduces the strength of the wrist, and can be easily closed when fully loaded with luggage, giving a light experience.

Description

Technical Field

[0001] The present invention relates to a trolley case, in particular to a trolley case with a shock-absorbing structure and a separated middle frame and rotating shaft. Background Art

[0002] A trolley case is a suitcase with a handle and wheels. It is a must-have item for people traveling because of its convenience. With the rapid development of the tourism industry and the growth of the travel market, consumers are increasingly demanding trolley cases, which has brought new opportunities and challenges to trolley case companies.

[0003] Some trolley cases currently on the market lack shock absorption functions, while others achieve shock absorption performance by setting springs, but their assembly is complex and costly. In addition, ordinary zipper suitcases are easily deformed, resulting in inflexible wheel seats. Conventional medium-frame suitcases are too heavy, which increases the weight of the luggage and requires greater force to drag. In addition, conventional locks on the market require a lot of force to press when they are full of luggage. Summary of the Invention

[0004] The purpose of the present invention is to provide a trolley case with a middle frame and a separated rotating shaft in a shock-proof structure, which solves the shortcomings of the prior art.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a shock-absorbing structure, a middle frame, a rotating shaft, and a separated trolley case, comprising a pull rod, a rear shell, a middle frame structure, and a front shell, wherein the middle frame structure comprises a rotating shaft structure and a pair of middle frames, wherein one middle frame is connected to the rear shell, and the other middle frame is connected to the front shell, and the characteristic is that the rotating shaft structure comprises a pair of rotating shafts and a core shaft, wherein one rotating shaft is snap-connected to one middle frame, and the other rotating shaft is snap-connected to the other middle frame, a pair of rotating shafts are movably connected through the core shaft, and a pair of middle frames are locked by an interlocking lock assembly, and shock-absorbing wheels are provided at the four corners of the bottom of the trolley case.

[0006] Furthermore, the rotating shaft has a connecting portion, and at least one convex rib portion is arranged on the side wall of the connecting portion at intervals along its length direction; the middle frame is provided with a groove portion, and a connecting groove is provided on the bottom surface of the groove portion; a stop portion is provided on the side wall of the connecting groove to cooperate with the convex rib portion, and a notch is formed on the rear side of the stop portion to match the convex rib portion; when the rotating shaft is installed on the middle frame, the bottom surface of the stop portion abuts against the top surface of the convex rib portion; a plurality of shaft sleeve portions are arranged on the top of the connecting portion at intervals along its length direction; an axial hole matching the core shaft is provided on the shaft sleeve portion, and a pair of shaft sleeve portions of the rotating shaft are hinged through the core shaft.

[0007] Furthermore, the front end of the connecting portion is connected to a first clamping portion, the front side of the groove portion is provided with a second clamping portion, the second clamping portion is provided with a slot, the first clamping portion is inserted into the slot and is snap-connected with the second clamping portion.

[0008] Furthermore, a clamping hole is provided on the top of the slot, and a clamping protrusion that matches the clamping hole is provided on the top of the first clamping portion.

[0009] Furthermore, the top surface of the rib portion is a first inclined surface, the bottom surface of the stop portion is a second inclined surface, and the angle between the second inclined surface and the side wall of the connecting groove is an acute angle. When the rotating shaft is installed on the middle frame, the second inclined surface abuts against the first inclined surface.

[0010] Furthermore, the interlocking lock assembly includes a main lock, two middle frames, namely middle frame one and middle frame two, the main lock is arranged on the side of middle frame one opposite to the side where the rotating shaft structure is located, and the middle frame two is provided with several lock hooks that cooperate with the main lock.

[0011] Furthermore, the main lock includes a main lock shell, a control mechanism and a pair of main lock core assemblies. The control mechanism and the pair of main lock core assemblies are both arranged on the main lock shell, and the pair of main lock core assemblies are respectively located on both sides of the control mechanism. When the control mechanism is actuated, it can control the opening and closing of the pair of main lock core assemblies.

[0012] Furthermore, the control mechanism includes a drive assembly and a customs lock, and the customs lock and the drive assembly are both arranged in the main lock housing.

[0013] Furthermore, the driving assembly includes a pushing member, a reduction gear, a rack 1 and a rack 2, the pushing member is slidably arranged in the main lock housing, and the push twist of the pushing member protrudes from the through hole on the lock cover of the main lock housing, the top of the pushing member is provided with a top plate portion, the lower part of the top plate portion is provided with a rack portion, the rack 1 is slidably arranged in the main lock housing, the rack 1 is connected to a main lock core assembly, the rack 2 is slidably arranged in the main lock housing, and the rack 2 is connected to another main lock core assembly, and the top plate portion drives and controls the rack 1 and the rack 2 through the reduction gear.

[0014] Furthermore, the main lock core assembly includes a key, a gear and a spring, a plurality of convex teeth are provided on one side of the lock hook, the gear is rotatably provided in the main lock housing, the gear can engage with the plurality of convex teeth on the lock hook, the key is rotatably provided in the main lock housing, a tooth groove portion is provided on one end of the key adjacent to the side of the gear, the other end of the key is movably connected to the rack one or the rack two, the spring is connected between the other end of the key and the rack one or the rack two, and the spring can make the tooth groove portion of the key engage with the teeth of the gear.

[0015] Furthermore, the main lock also includes a bump ball and a bump ball spring, the bump ball is movably arranged in the main lock housing, the bump ball spring is arranged between the bump ball and the main lock housing, and the bump ball spring makes the bump ball press against the pushing member, and the pushing member is provided with an indication hole 1 and an indication hole 2 that cooperate with the bump ball.

[0016] Furthermore, the interlocking lock assembly also includes several side locks interlocked with the main lock, at least one side lock is arranged on the upper side of the middle frame one, at least one side lock is arranged on the lower side of the middle frame one, and the middle frame two is provided with several lock hooks that cooperate with the side locks. The control mechanism can control the opening and closing of several side locks while controlling the opening and closing of a pair of main lock core assemblies.

[0017] Furthermore, the side lock includes a side lock shell and a side lock core assembly arranged in the side lock shell, the side lock core assembly includes a buckle key 2, a gear 2 and a spring 2, a plurality of convex teeth are provided on one side of the lock hook, the gear 2 is rotatably arranged in the side lock shell, the gear 2 can engage with the plurality of convex teeth on the lock hook, the buckle key 2 is rotatably arranged in the side lock shell, the spring 2 is connected between the buckle key 2 and the side lock shell, one end of the buckle key 2 is connected to the control mechanism through a cable, and under the action of the spring 2, the other end of the buckle key 2 can be buckled on the teeth of the gear 2.

[0018] Furthermore, the shock-absorbing wheel includes a wheel seat assembly and a roller. The lower part of the wheel seat assembly has a buffer cavity, a buffer pad is secondary injection-molded in the buffer cavity, and a roller seat is provided at the bottom of the buffer cavity. The roller is installed on the roller seat.

[0019] Furthermore, the wheel seat assembly includes an axle seat, the lower part of the axle seat extends backward to form a tail seat, the buffer cavity is arranged on the tail seat, and the roller seat is connected to the lower part of the tail seat.

[0020] Furthermore, the buffer pad is provided with at least one buffer hole or at least one buffer groove.

[0021] Furthermore, the wheel seat assembly includes an axle seat, the middle part of the axle seat extends backward to form a rear seat, the lower part of the axle seat is pivotally connected to a swing shaft, the other end of the swing shaft extends downwardly from the rear seat and is connected to the roller seat, and the buffer cavity is formed between the swing shaft, the roller seat and the rear seat.

[0022] Furthermore, the roller seat is supported on the main bearing surface of the bottom of the middle part of the buffer pad, the lifting part of the tail of the rear seat is supported on the limiting bottom surface of the bottom of the rear part of the buffer pad, an opening is formed between the roller seat and the lifting part, the protrusion of the bottom of the buffer pad is embedded in the opening, and the swing shaft is supported on the auxiliary bearing surface of the bottom of the front part of the buffer pad.

[0023] It can be seen from the above technical solution that the present invention has the following beneficial effects:

[0024] The trolley case provided by the present invention adopts shock-absorbing wheels, multi-stage linkage locks and a separate rotating shaft middle frame structure. The trolley case with a lightweight and simple middle frame structure makes the trolley case structure stable and not easy to deform. In addition, the shock-absorbing structure makes it smoother to walk when pulling luggage and reduces the strength of the human wrist. In addition, the multi-stage linkage lock structure makes it easy to close when full of luggage, giving people a lightweight experience. In addition, this structure is simple to assemble, saving labor assembly costs.

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0028] Figure 2 It is an exploded view of the present invention.

[0029] Figure 3 It is another three-dimensional structural schematic diagram of the present invention.

[0030] Figure 4 It is a structural schematic diagram of the connection between the rotating shaft and the middle frame of the present invention.

[0031] Figure 5 for Figure 4 Schematic diagram of the local enlarged structure at X.

[0032] Figure 6 It is a schematic diagram of the partial structure of the rotating shaft of the present invention.

[0033] Figure 7 It is a schematic diagram of the three-dimensional structure of the rotating shaft of the present invention.

[0034] Figure 8 It is a structural schematic diagram of the middle frame structure of the present invention.

[0035] Figure 9 for Figure 8 Schematic diagram of the local enlarged structure at Y in the figure.

[0036] Figure 10 This is a schematic diagram of multiple sets of middle frames stacked together and injected into the production line at the same time.

[0037] Figure 11 Schematic diagram of the structure of the interlocking lock assembly of the present invention.

[0038] Figure 12 It is a structural schematic diagram of the interlocking lock assembly of the present invention when it is in a closed state.

[0039] Figure 13 It is an exploded view of the interlocking lock assembly of the present invention when it is in a closed state.

[0040] Figure 14 for Figure 12 Schematic diagram of the local enlarged structure.

[0041] Figure 15 for Figure 13 Schematic diagram of the local enlarged structure.

[0042] Figure 16 It is a structural schematic diagram of the interlocking lock assembly of the present invention when it is in an open state.

[0043] Figure 17 This is a schematic diagram of the first structure of the shock-absorbing wheel of the present invention.

[0044] Figure 18 This is a schematic diagram of the first structure of the buffer pad of the shock-absorbing wheel of the present invention.

[0045] Figure 19 This is a schematic diagram of the second structure of the buffer pad of the shock-absorbing wheel of the present invention.

[0046] Figure 20 This is a schematic diagram of the third structure of the buffer pad of the shock-absorbing wheel of the present invention.

[0047] Figure 21 This is a schematic diagram of the second structure of the shock-absorbing wheel of the present invention.

[0048] Figure 22This is a fourth structural schematic diagram of the buffer pad of the shock-absorbing wheel of the present invention.

[0049] Description of the accompanying drawings: handle 1, pull rod 2, rear shell 3, shock-absorbing wheel 4, wheel seat assembly 41, shaft seat 411, buffer cavity 412, roller seat 413, tail seat 414, rear seat 415, lifting portion 4151, swing shaft 416, opening 417, buffer pad 42, buffer pad 1 42a, buffer pad 2 42b, buffer pad 3 42c, buffer pad 4 42d, buffer hole 421, buffer groove 422, auxiliary bearing surface 423, main bearing surface 424, limiting bottom surface 425, protrusion 426, recessed portion 427, roller 43, Middle frame structure 5, middle frame 51, middle frame 1 51a, middle frame 2 51b, groove portion 511, connecting groove 5111, stop portion 5112, second inclined surface 51121, notch 5113, second clamping portion 512, slot 5121, clamping hole 5122, guide boss 513, rotating shaft 52, connecting portion 521, rib portion 5211, first inclined surface 52111, inclined guide portion 52112, shaft sleeve portion 522, shaft hole 5221, first clamping portion 523, clamping convex 5231, guide inclined surface 52311, guide Slot 524, side lock 6, side lock housing 61, connecting seat 611, side lock core assembly 62, buckle 2 621, tooth groove part 2 6211, blocking surface 3 6212, blocking surface 4 6213, gear 2 622, spring 2 623, main lock 7, main lock housing 71, lock base 711, lock cover 712, through hole 7121, pressure cover 1 713, pressure cover 2 714, main lock core assembly 72, buckle 1 721, tooth groove part 1 7211, blocking surface 1 7212, blocking surface 2 7213, gear 1 722, spring 1 723, control mechanism Structure 73, pushing member 731, pushing knob 7311, top plate portion 7311, rack portion 7312, tail surface 7313, indicator hole 1 7314, indicator hole 2 7315, reduction gear 732, large gear 7321, small gear 7322, rack 1 733, rack 2 734, bumper 735, bumper spring 736, customs lock 737, pressing piece 7371, cable 738, outer tube sleeve 7381, core rope 7382, lock hook 8, convex teeth 81, front shell 9, vertical stripes 10, oblique stripe 1 11, oblique stripe 2 12. DETAILED DESCRIPTION

[0050] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0051] Reference below Figures 1 to 22 The present invention will be further described as follows. Figure 1 、 Figure 2 、 Figure 3The shown embodiment shows a trolley case with a shock-absorbing structure and a middle frame and a rotating shaft, comprising a pull rod 2, a rear shell 3, a middle frame structure 5 and a front shell 9. The middle frame structure 5 comprises two sets of rotating shaft structures and a pair of middle frames 51. The two middle frames 51 are middle frame one 51a and middle frame two 51b respectively, wherein middle frame one 51a is connected to the rear shell 3, and middle frame two 51b is connected to the front shell 9. The rotating shaft structure comprises a pair of rotating shafts 52 and a core shaft, wherein one rotating shaft 52 is snap-connected to middle frame one 51a, and the other rotating shaft 52 is snap-connected to middle frame two 51b. The pair of rotating shafts 52 are movably connected by the core shaft and can be opened and closed 180 degrees when opened. The pair of middle frames 51 are locked by a linkage lock assembly. Shock-absorbing wheels 4 are provided at the four corners of the bottom of the trolley case. The pull rod 2 is installed on the rear shell 3. A handle 1 is provided on the top of the rear shell 3, and a handle 1 is provided on the side of the front shell 9.

[0052] like Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, the rotating shaft 52 has a connecting portion 521, and a plurality of convex ribs 5211 are arranged at intervals along the length direction of the connecting portion 521 on one side wall of the connecting portion 521, and a plurality of convex ribs 5211 are arranged at intervals along the length direction of the connecting portion 521 on the other side wall of the connecting portion 521. The convex ribs 5211 on the two side walls of the connecting portion 521 are staggered, and a groove portion 511 is provided on the middle frame 51, and a connecting groove 5111 is provided on the bottom surface of the groove portion 511, and a stop portion 5112 matching the convex rib portion 5211 is provided on the side wall of the connecting groove 5111, and a notch 5113 adapted to the corresponding convex rib portion 5211 is formed on the rear side of each stop portion 5112. When the rotating shaft 52 is installed on the middle frame 51, the stop portion The bottom surface of the portion 5112 is abutted against the top surface of the rib portion 5211, and a plurality of shaft sleeve portions 522 are connected and arranged at equal intervals along the length direction of the top of the connecting portion 521. The shaft sleeve portion 522 is provided with an axial hole 5221 adapted to the core shaft, and the core shaft alternately passes through the shaft sleeve portions 522 of a pair of rotating shafts 52 to hinge the pair of rotating shafts 52. In addition, the front end of the connecting portion 521 is connected with a first clamping portion 523, and a second clamping portion 512 is provided on the middle frame 51 at the front side of the groove portion 511. The second clamping portion 512 is provided with a slot 5121, and the top of the slot 5121 is provided with a clamping hole 5122 that passes through the top surface of the second clamping portion 512, and the top of the first clamping portion 523 is provided with a clamping protrusion 5231 that matches the clamping hole 5122.

[0053] During installation, the rib portion 5211 on the connecting portion 521 is aligned with the notch 5113 and the connecting portion 521 is inserted into the connecting groove 5111. Then, the rotating shaft 52 is pushed along the length direction of the connecting groove 5111, so that the rib portion 5211 on the rotating shaft 52 moves to the bottom of the corresponding stop portion 5112, so that the bottom surface of the stop portion 5112 is abutted against the top surface of the rib portion 5211. In addition, in the process of pushing the rotating shaft 52, the first clamping portion 523 is inserted into the slot 5121, and finally the clamping protrusion 5231 is clamped into the clamping hole 5122, so that the rotating shaft 52 is reliably connected to the middle frame 51.

[0054] Preferably, Figure 6 As shown, a guiding slope 52311 is provided on the front side of the top of the locking protrusion 5231 , and an inclined guiding portion 52112 is provided on the front end of the rib portion 5211 .

[0055] Preferably, Figure 8 、 Figure 9 As shown, the top surface of the rib portion 5211 is an inclined first slope 52111, the bottom surface of the stop portion 5112 is an inclined second slope 51121, and the angle between the second slope 51121 and the side wall of the connecting groove 5111 is an acute angle. When the rotating shaft 52 is installed on the middle frame 51, the second slope 51121 abuts against the first slope 52111, making the fixed connection between the rotating shaft 52 and the middle frame 51 more reliable.

[0056] Preferably, Figure 8 、 Figure 9 As shown, a guide boss 513 is provided at the bottom of the connecting groove 5111 , and a guide groove 524 is opened on the bottom wall of the rotating shaft 52 along the length direction of the rotating shaft 52 , which passes through the front and rear end surfaces of the guide groove 524 , and the guide groove 524 is slidably engaged with the guide boss 513 .

[0057] like Figure 10 As shown, the rotating shaft 52 is detachably connected to the middle frame 51, so that the middle frame 51 is free from the limitation of the rotating shaft needing to be core-pulled in the prior art, so that the middle frame 51 can realize the simultaneous injection molding of multiple sets of products stacked together, thereby improving the molding efficiency of the middle frame 51.

[0058] like Figure 2 、 Figure 11As shown, the interlocking lock assembly includes a main lock 7 and a pair of side locks 6 interlocked with the main lock 7. The main lock 7 is arranged on the side of the middle frame 51a opposite to the side where the rotating shaft structure is located. The main lock 7 includes a main lock shell 71, a control mechanism 73 and a pair of main lock core assemblies 72. The control mechanism 73 and the pair of main lock core assemblies 72 are both arranged in the main lock shell 71, and the pair of main lock core assemblies 72 are respectively located on both sides of the control mechanism 73. One side lock 6 is arranged on the upper side of the middle frame 51a, and the other side lock 6 is arranged on the lower side of the middle frame 51a. Four lock hooks 8 are arranged on the middle frame 51b, and a number of protruding teeth 81 are arranged on one side of the lock hook 8. The control mechanism 73 can control the opening and closing of a pair of side locks 6 while controlling the opening and closing of a pair of main lock core assemblies 72.

[0059] like Figure 12 、 Figure 13 、 Figure 15 When the cam 712 is unlocked, the door 70 is unlocked and the key 730 is unlocked. As shown in FIG, the main lock housing 71 includes a lock base 711 and a lock cover 712, a pressure cover 1 713 and a pressure cover 2 714 connected to the lock base 711. The pressure cover 1 713 and the pressure cover 2 714 form a main lock cavity with the lock base 711 respectively. The control mechanism 73 includes a drive assembly and a customs lock 737. The customs lock 737 is installed on the inner side of the lock cover 712. The drive assembly is arranged in the main lock housing 71. Specifically, the drive assembly includes a pushing member 731, a pair of reduction gears 732, a rack 1 733 and a rack 2 734. The pushing member 731 is slidably arranged in the main lock housing 71, and the push knob 7311 of the pushing member 731 is slidably matched with the through hole 7121 on the lock cover 712, and the push knob 7311 protrudes from the through hole 7121 on the lock cover 712. 121. A top plate portion 7311 is provided on the top of the pushing member 731, and a rack portion 7312 is provided at the lower portion of the top plate portion 7311. The large gear 7321 of a reduction gear 732 is meshed with the rack portion 7312, and the small gear 7322 on the reduction gear 732 is meshed with the large gear 7321 of another reduction gear 732. The rack 1 733 is slidably set in the main lock housing 71, and the rack 1 733 is meshed with the small gear 7322 on the other reduction gear 732. The rack 1 733 is connected to a main lock core assembly 72. The rack 2 734 is slidably set in the main lock housing 71, and the rack 2 734 is meshed with the small gear 7322 on the other reduction gear 732, and the rack 2 734 is connected to the other main lock core assembly 72.

[0060] like Figure 12 、 Figure 13 、 Figure 14As shown, the main lock core assembly 72 includes a key 721, a gear 722 and a spring 723. The gear 722 is rotatably arranged in the main lock cavity of the main lock housing 71. The gear 722 can mesh with the plurality of convex teeth 81 on the lock hook 8. The key 721 is rotatably arranged in the main lock cavity of the main lock housing 71. One end of the key 721 is adjacent to the side of the gear 722 and a tooth groove portion 7211 is provided. The other end of the key 721 is engaged with the gear 723. Rack one 733 or rack two 734 are movably connected, and spring one 723 is connected between the other end of key one 721 and rack one 733 or rack two 734. Under the action of the elastic force of spring one 723, the tooth groove portion 7211 of key one 721 can be engaged and connected to the teeth of gear one 722, and the blocking surface one 7212 and blocking surface two 7213 of key one 721 press against gear one 722, so that gear one 722 cannot be reversed.

[0061] like Figure 13 、 Figure 14 As shown, the side lock 6 includes a side lock housing 61 and a side lock core assembly 62 arranged in the side lock housing 61. The side lock core assembly 62 includes a second buckle key 621, a second gear 622 and a second spring 623. The second gear 622 is rotatably arranged in the side lock housing 61. The second gear 622 can engage with a plurality of convex teeth 81 on the lock hook 8. The second buckle key 621 is rotatably arranged in the side lock housing 61. One end of the second buckle key 621 is adjacent to the side of the second gear 622 and is provided with a second tooth groove portion 621. 1. The other end of the second buckle key 621 is connected to the first rack 733 or the second rack 734 through a cable 738. The second spring 623 is connected and arranged between the second buckle key 621 and the connecting seat 611 of the side lock housing 61. Under the action of the second spring 623, the second tooth groove portion 6211 of the second buckle key 621 is buckled on the teeth of the second gear 622, and the third and fourth blocking surfaces 6212 and 6213 of the second buckle key 621 press against the second gear 622, so that the second gear 622 cannot be reversed.

[0062] Preferably, Figure 13 、 Figure 14 、 Figure 15 When the latch is in the locked state, the latch will be turned to the unlocked state, and the locking cam 731 will be turned to the unlocked state, so that the unlocked state can be realized.

[0063] like Figure 14 As shown, the cable 738 includes a core rope 7382 and an outer tube sleeve 7381 sleeved on the outside of the core rope 7382, one end of the outer tube sleeve 7381 is connected to the connecting seat 611 of the side lock shell 61, and the other end of the outer tube sleeve 7381 is connected to the main lock shell 71, one end of the core rope 7382 is connected to the buckle 2 621, and the other end of the core rope 7382 is connected to the rack 1 733 or the rack 2 734.

[0064] like Figure 3 、 Figure 12 、 Figure 16As shown, when the push piece 731 is in the closed state, the trolley case is closed, and the lock hook 8 on the middle frame 51b drives the gear 1 722 of the main lock core assembly 72 to rotate. The rotation of gear 1 722 forces the buckle key 1 721 to overcome the elastic force of spring 1 723. After the lock hook 8 is buckled to the next level, the buckle key 1 721 will be buckled by the force of spring 1 723 to tighten the gear 1 722, and a collision sound will be generated at the same time, letting the user know that the lock hook 8 is buckled. At the same time, the lock hook 8 will also drive the gear 2 622 of the side lock core assembly 62 to rotate, and the rotation of gear 2 622 forces the buckle key 2 621 to overcome the elastic force of spring 2 623. The second gear 622 is locked and the second gear 622 is locked. When the trolley case is in the closed state, the bump ball 735 is pressed against the pushing member 731 by the pushing force of the bump ball spring 736, so that the pushing member 731 cannot move at will. When the user closes the customs lock 737, the pressing piece 7371 of the customs lock 737 presses against the tail surface 7313 of the pushing member 731, so that the lock is in the closed state. When the user needs to open the trolley case, the pushing member 731 is pushed, and the pushing member 731 drives the large gear 7321 of the reduction gear 732 to rotate, and the small gear 7322 on the reduction gear 732 drives the large gear 7321 of the other reduction gear 732 to rotate, thereby The small gear 7322 on the first reduction gear 732 drives the rack 1 733 and the rack 2 734 to move, which further drives the rack 1 733 and the rack 2 734 to drive the corresponding buckle 1 721 to rotate, so that the buckle 1 721 disengages from the gear 1 722, so that the gear 1 722 can rotate freely, and then the lock hook 8 can freely disengage from the main lock 7. At the same time, the rack 1 733 and the rack 2 734 drive the corresponding cable 738 to move, so that the buckle 2 621 disengages from the gear 2 622, so that the gear 2 622 can rotate freely, and the lock hook 8 can freely disengage from the side lock 6, so that the box can be opened.

[0065] In addition, the number of side locks 6 can be increased or decreased according to the size of the suitcase.

[0066] like Figure 17 、 Figure 18As shown, the shock-absorbing wheel 4 includes a wheel seat assembly 41 and a pair of rollers 43. The wheel seat assembly 41 includes an axle seat 411. The lower part of the axle seat 411 extends backward to form a tail seat 414. The lower part of the tail seat 414 is connected to the roller seat 413. A buffer cavity 412 is formed between the tail seat 414 and the roller seat 413. A buffer pad 42 is secondary injection molded in the buffer cavity 412. The buffer pad 42 is a buffer pad 42a. The buffer pad 42 is made of soft rubber. The roller seat 413 is sunken into the recessed portion 427 of the buffer pad 42a. A pair of rollers 43 are installed on the roller seat 413. When the shock-absorbing wheel 4 rotates and falls, the punching of the buffer pad 42a has a shock-absorbing effect, which more effectively protects the trolley case. It is simple to assemble and saves costs.

[0067] Preferably, Figure 18 As shown, a positioning boss is provided on the inner peripheral wall of the buffer cavity 412, and a positioning groove matching with the positioning boss is provided on the outer periphery of the buffer pad 1 42a.

[0068] In another embodiment, Figure 19 As shown, the buffer pad 42 is the buffer pad 2 42b. The difference between the buffer pad 2 42b and the buffer pad 1 42a is that three buffer holes 421 are provided on the buffer pad 2 42b. The two ends of the buffer holes 421 pass through the two side walls of the buffer pad 2 42b. Two of the buffer holes 421 are round holes, and one buffer hole 421 is a crescent-shaped special-shaped hole. The buffer holes 421 are added according to the size of the trolley case to achieve better buffering effect.

[0069] In another embodiment, Figure 20 As shown, the buffer pad 42 is the buffer pad three 42c. The difference between the buffer pad three 42c and the buffer pad one 42a is that a buffer groove 422 is provided on the side wall of the buffer pad three 42c. The buffer groove 422 is an irregular groove. The buffer groove 422 is added according to the size of the suitcase to achieve better buffering effect.

[0070] In another embodiment, Figure 21 、 Figure 22As shown, the shock-absorbing wheel 4 includes a wheel seat assembly 41, a buffer pad 42 and a pair of rollers 43. The wheel seat assembly 41 includes a mounting seat and an axle seat 411. The upper end of the axle seat 411 is rotatably connected to the mounting seat. The middle part of the axle seat 411 extends backward to form a rear seat 415. The lower part of the axle seat 411 is pivotally connected to a swing shaft 416. The other end of the swing shaft 416 extends below the rear seat 415 and is connected to a roller seat 413. A buffer cavity 412 is formed between the swing shaft 416, the roller seat 413 and the rear seat 415. The buffer pad 42 is a buffer pad four 42d. The buffer pad four 42d is embedded in the buffer cavity 412. The roller seat 413 is supported on the main bearing surface 424 at the bottom of the middle part of the buffer pad four 42d, and the lifting part 4151 at the tail of the rear seat 415 is supported on the bottom of the rear of the buffer pad four 42d. On the limiting bottom surface 425, an opening 417 is formed between the roller seat 413 and the lifting portion 4151, and the protrusion 426 at the bottom of the buffer pad four 42d is embedded in the opening 417. The swing shaft 416 is supported on the auxiliary bearing surface 423 at the bottom of the front part of the buffer pad four 42d. The buffer pad four 42d is made of soft rubber material. During assembly, the wheel seat assembly 41 and the swing shaft 416 are first connected together, and then the buffer pad four 42d is injection molded for the second time, so that the buffer pad four 42d is combined between the wheel seat assembly 41 and the swing shaft 416. A pair of rollers 43 are installed on the roller seat 413, so that when the shock-absorbing wheel 4 rotates and falls, the stamping buffer pad four 42d has a shock-absorbing effect, avoiding the impact directly acting on the trolley case, effectively protecting the trolley case shell, and simple assembly, saving costs.

[0071] Preferably, Figure 1 As shown, the rear shell 3 is provided with vertical stripes 10, oblique stripe one 11 and oblique stripe two 12 protruding from the outer surface of the rear shell 3, and the front shell 9 is also provided with vertical stripes 10, oblique stripe one 11 and oblique stripe two 12 protruding from the outer surface of the rear shell 3. The vertical stripes 10, oblique stripe one 11 and oblique stripe two 12 form exquisite patterns on the outer surfaces of the rear shell 3 and the front shell 9, making the trolley case beautiful in appearance.

[0072] like Figure 2 、 Figure 3As shown, when in use, push the push button 721, and multiple lock hooks 8 of the trolley case are opened at the same time. At this time, the trolley case can be opened and closed 180 degrees. When the trolley case is full of luggage, the closing lock hooks 8 can adjust the closing distance and can be easily closed. In addition, the wheel seat assembly 41 of the installed shock-absorbing wheel 4 uses secondary injection molding soft glue to produce a buffering effect to achieve a shock-absorbing function, which reduces the shaking of the trolley case when pushing and pulling. The middle frame structure makes the trolley case more stable, improves the deformation of the conventional trolley case when it is full of luggage, which makes it difficult to drag and walk. In addition, the rotating shaft 52 and the middle frame 51 are separated and connected with a buckle structure, eliminating screw fastening to make assembly simpler and reduce labor costs. In addition, the separation of the rotating shaft 52 and the middle frame 51 reduces the molding cycle of the middle frame 51, simplifies the mold of the middle frame 51, and enables the middle frame 51 mold to achieve stacking production, thereby improving the molding efficiency of the middle frame 51. The assembly is simple, reliable and saves costs.

[0073] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A trolley case with a shock-absorbing structure and a middle frame and a rotating shaft, comprising a drawbar (2), a rear shell (3), a middle frame structure (5) and a front shell (9), wherein the middle frame structure (5) comprises a rotating shaft structure and a pair of middle frames (51), wherein one middle frame (51) is connected to the rear shell (3), and the other middle frame (51) is connected to the front shell (9), characterized in that: The rotating shaft structure includes a pair of rotating shafts (52) and a core shaft, wherein one rotating shaft (52) is snap-connected to a middle frame (51), and the other rotating shaft (52) is snap-connected to the other middle frame (51), the pair of rotating shafts (52) are movably connected through the core shaft, and the pair of middle frames (51) are locked by a linkage lock assembly, and shock-absorbing wheels (4) are provided at the four corners of the bottom of the trolley case; the shock-absorbing wheels (4) include a wheel seat assembly (41) and a roller (43), and the lower part of the wheel seat assembly (41) has a buffer chamber (43). 12), a buffer pad (42) is secondary-injected in the buffer cavity (412), a roller seat (413) is provided at the bottom of the buffer cavity (412), and the roller (43) is mounted on the roller seat (413); the wheel seat assembly (41) includes an axle seat (411), the middle portion of the axle seat (411) extends backward to form a rear seat (415), the lower portion of the axle seat (411) is pivotally connected to a swing shaft (416), and the other end of the swing shaft (416) extends downward to the rear seat (415) The roller seat (413) is connected to the roller seat (413), and the buffer cavity (412) is formed between the swing shaft (416), the roller seat (413) and the rear seat (415); the roller seat (413) is supported on the main bearing surface (424) at the bottom of the middle part of the buffer pad (42), and the lifting portion (4151) at the tail of the rear seat (415) is supported on the limiting bottom surface (425) at the bottom of the rear part of the buffer pad (42), and an opening is formed between the roller seat (413) and the lifting portion (4151). The invention relates to a wheel base (413) and a wheel base (414) comprising a plurality of rollers (43) and a plurality of rollers (43). The wheel base (413) comprises a plurality of rollers (43) and a plurality of rollers (43). The plurality of rollers (43) are connected to each other by a plurality of injection molding machines. The plurality of rollers (43) are connected to each other by a plurality of injection molding machines. The plurality of rollers (43) are connected to each other by a plurality of injection molding machines. The plurality of rollers (43) are connected to each other by a plurality of injection molding machines.

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