A reinforced trolley for a trolley case and a method of reinforcing a trolley

Abstract

The application belongs to the technical field of trolley cases, and discloses a trolley case reinforced trolley and a reinforcing method thereof, which comprises a movable rod assembly and a fixed rod assembly, the movable rod assembly is movably sleeved at the top of the fixed rod assembly, and a control handle is movably arranged in the movable rod assembly. The positioning blocks on both sides of the reinforcing frame are synchronously moved and sleeved in the clamping holes to complete preliminary clamping, the screw rod in the adjusting control assembly is further moved upward to compress the hydraulic oil in the distribution sleeve again, the auxiliary reinforcing assembly distributed in the inner frame is driven to act under the action of the hydraulic oil, the auxiliary clamping block is extended and acts on the inner wall of the reinforcing frame after completing preliminary adjustment and reinforcing clamping, the positioning and reinforcing of the trolley pulled out of the trolley case are further enhanced, the clamping failure and clamping shaking caused by fracture or vibration are avoided, the structural stability and the trolley strength are greatly improved, the clamping failure is avoided, and the use stability is better.

Description

Technical Field

[0001] This invention belongs to the field of trolley case technology, specifically a trolley case reinforcing handle and its reinforcing method. Background Technology

[0002] A rolling suitcase is a common luggage carrying tool, especially suitable for travel and business trips. It typically consists of a sturdy shell, internal storage space, wheels, and a retractable handle, which the user can use to drag the suitcase.

[0003] In existing technology, the handle of a suitcase moves up and down or extends under the control of an internal latch assembly via a control handle. The extension length can be adjusted according to actual needs. However, current latch assemblies typically use a single-sided latch for support. Due to the compression of this single-sided latch, the stability at the latch-hole connection point deteriorates under strong external force, leading to breakage and poor strength. Furthermore, with increased usage time, wear and tear at the latch and hole adjustment points increase the gap, causing wobbling after latching. This further deteriorates the stability of the handle, resulting in poor overall strength and stability, and ultimately, poor performance.

[0004] Furthermore, existing suitcase handles, designed for transporting valuable items, have high requirements for resistance to vibration. However, once extended to the specified length, the control handle is prone to accidental activation during use, causing further extension or retraction. Overall, the stability of the handle is poor, and there is a certain degree of vibration risk, increasing the risk of vibration to the items inside the suitcase. This results in poor transport safety and stability, and unsatisfactory performance. Summary of the Invention

[0005] The purpose of this invention is to provide a reinforced pull rod for a suitcase and a method for doing so, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a reinforcing pull rod for a suitcase and a reinforcing method thereof, comprising a movable rod assembly and a fixed rod assembly, wherein the movable rod assembly is movably sleeved on the top of the fixed rod assembly, a control handle is movably installed inside the movable rod assembly, an inner frame is fixedly connected to the lower end of the movable rod assembly, the inner frame is movably sleeved inside the fixed rod assembly, a positioning adjustment assembly is provided at the lower part inside the inner frame, a distribution assembly is provided at the top of the positioning adjustment assembly, the top of the distribution assembly is movably installed with the lower end of the control handle, an auxiliary reinforcing assembly is provided inside the inner frame, a connecting pipe is fixedly connected between the auxiliary reinforcing assembly and the movable rod assembly, and an adjustment control assembly is fixedly connected to the ground of the movable rod assembly;

[0007] The movable rod assembly includes a handle frame, a top opening, an internal cavity, a through hole, a side groove, and a curved hole;

[0008] The inner frame includes a movable frame, a slide, a first opening, and a second opening;

[0009] The positioning adjustment assembly includes a guide frame, a positioning block, a top groove, a crank, a second spring, and a connecting sleeve;

[0010] The auxiliary reinforcement component includes a fixing block, a first cavity, an auxiliary clamping block, a third spring, an intermediate cavity, and a connecting hole;

[0011] The adjustment and control assembly includes a distribution sleeve, a side sleeve, a threaded rod, a fixing ring, a limiting ring, and a bypass hole.

[0012] Preferably, the top opening and the internal cavity are respectively opened on the top and inside of the handle frame, the through hole and the side groove are respectively opened on the bottom and side of the handle frame, the internal cavity is connected to the top opening and the through hole, the curved hole is opened inside the handle frame, and the two ends of the curved hole are respectively located on the bottom and inner side of the handle frame.

[0013] Preferably, the fixing rod assembly includes a support frame, a reinforcing frame, a locking hole, and a locking block. The reinforcing frame is fixedly sleeved inside the support frame, the locking hole is opened on the inner surface of the reinforcing frame, and the locking block is fixedly connected above the inner surface of the support frame.

[0014] Preferably, the movable frame is fixedly connected to the bottom of the handle frame and communicates with the internal cavity, the slide groove is opened on the side of the movable frame, the first opening and the second opening are respectively opened on the side and the back of the movable frame, and the movable frame is movably fitted inside the reinforcing frame.

[0015] Preferably, the guide frame is fixedly connected to the bottom inside the movable frame, the positioning blocks are symmetrically distributed inside the guide frame, the second spring is fixedly connected between adjacent positioning blocks, the positioning block is movably sleeved in the first opening, the curved rod is fixedly connected to the top surface of the positioning block, the connecting sleeve is fixedly sleeved on the side of the movable frame, and one end of the curved rod is movably sleeved in the connecting sleeve.

[0016] Preferably, the dispensing component includes a fixed sleeve, a connecting frame, and a side frame. One end of the side frame is fixedly connected to the connecting sleeve, and the other end of the side frame is fixedly connected to the connecting frame. The connecting frame is located above the positioning adjustment component, and the fixed sleeve is fixedly connected to the top of the connecting frame.

[0017] Preferably, the control handle includes a pressing plate, a connecting plate, a first spring, and a control rod. The pressing plate is movably sleeved inside the top opening. The connecting plate is movably sleeved inside the inner cavity and fixedly connected to the bottom surface of the pressing plate. One end of the first spring is fixedly connected to the connecting plate, and the other end of the first spring is fixedly connected to the bottom surface of the inner cavity. One end of the control rod is fixedly connected to the bottom surface of the connecting plate, and the other end of the control rod passes through the auxiliary reinforcing component and is movably sleeved inside the fixed sleeve.

[0018] Preferably, the fixing block is fixedly installed inside the movable frame and movably sleeved with the control rod. Both the first cavity and the intermediate cavity are opened inside the fixing block, and the first cavity is connected to the intermediate cavity. The auxiliary clamping block is movably sleeved inside the first cavity and the second opening. One end of the third spring is fixedly connected to the auxiliary clamping block, and the other end of the third spring is fixedly connected to the inside of the first cavity. The connecting hole is opened at the top of the fixing block and is connected to the first cavity. The first cavity is connected to the second opening. The lower end of the connecting tube is fixedly connected to the top of the fixing block and is connected to the connecting hole. The upper end of the connecting tube is fixedly connected to the bottom surface of the handle frame and is connected to the curved hole.

[0019] Preferably, the distribution sleeve is fixedly connected to the handle bracket and communicates with the through hole, the side sleeve is fixedly connected to the side of the distribution sleeve and communicates with the curved hole, the threaded rod is threadedly sleeved on the bottom of the distribution sleeve, the fixing ring is fixedly sleeved on the outer surface of the threaded rod and movably sleeved inside the distribution sleeve, the limiting ring is fixedly sleeved inside the through hole and sleeved on the outer side of the threaded rod, and the bypass hole is opened at the bottom of the distribution sleeve.

[0020] A method for strengthening the pull rod of a suitcase includes the following strengthening steps:

[0021] Step 1: When using, press the control handle to move the control lever down and squeeze the storage fluid in the dispensing component, causing the hydraulic pressure to push the positioning block in the positioning adjustment component out of the fixed rod assembly, and pull the movable rod assembly upward to perform stretching adjustment;

[0022] Step 2: When the target height is reached, release the control handle. The positioning block in the positioning adjustment component moves outward due to the elastic reset action of the internal No. 2 spring and automatically fits into the locking hole of the fixed rod component. The locking holes on both sides of the reinforcing frame are simultaneously engaged, completing the initial reinforcement.

[0023] Step 3: Rotate the threaded rod in the adjustment control assembly to make the fixed ring move up in the distribution sleeve and squeeze the internal storage liquid, thereby increasing the hydraulic pressure. The hydraulic pressure in the curved hole is increased, and the hydraulic pressure in the auxiliary reinforcing assembly under the connection is increased. Under the hydraulic push, the auxiliary clamping block extends out along the No. 2 port and clamps the inside of the reinforcing frame, thus completing the further reinforcement.

[0024] Step 4: When the suitcase needs to be extended for an extended period of time and pulled, as the reinforcement is completed, the threaded rod moves up along the through hole into the internal cavity and abuts against the connecting plate in the control handle from the bottom, thus locking it in place.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. This invention utilizes the downward pressing action of the control handle to enhance the hydraulic pressure in the distribution component, pushing the locked positioning block. After adjusting to the appropriate extension position, the positioning blocks on both sides are reset, causing the positioning blocks on both sides inside the reinforcing frame to move synchronously and engage in the locking holes to complete the initial locking. In conjunction with the upward movement of the threaded rod in the adjustment control component, the hydraulic pressure in the distribution sleeve is compressed again. Under the action of hydraulic pressure, the auxiliary reinforcing components distributed in the inner frame are activated. After completing the initial adjustment and locking, the auxiliary clamping block extends and acts on the inner wall of the reinforcing frame, further enhancing the positioning reinforcement of the pull rod in the trolley case. This avoids locking failure and locking wobbling caused by breakage or vibration, greatly enhancing the structural stability and pull rod strength, preventing locking failure, and improving the stability of use.

[0027] 2. By reusing the adjustment and control components, after completing the auxiliary reinforcement and strengthening the positioning of the extended pull rod, the present invention, in conjunction with the movement and extension of the threaded rod, limits the control handle from the bottom, thus restricting the downward movement of the control handle. During long-term use, it avoids accidental release of the positioning and locking of the moving rod assembly and the fixed rod assembly. It provides better stability for items that require safe transportation and avoids damage to the transported items inside the box caused by vibrations from accidental extension and retraction. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention;

[0029] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0030] Figure 3 This is a cross-sectional schematic diagram of the fixing rod assembly of the present invention;

[0031] Figure 4 This is a schematic diagram showing the connection between the control handle, the auxiliary reinforcement component, and the distribution component of the present invention;

[0032] Figure 5 This is a schematic diagram of the control handle of the present invention;

[0033] Figure 6 This is a cross-sectional schematic diagram of the inner frame of the present invention;

[0034] Figure 7 This is a cross-sectional schematic diagram of the movable rod assembly of the present invention;

[0035] Figure 8 This is an exploded view of the regulating control component of the present invention;

[0036] Figure 9 This is an exploded view of the positioning adjustment component of the present invention;

[0037] Figure 10 A cross-sectional schematic diagram of the distribution components of this invention;

[0038] Figure 11 This is a cross-sectional schematic diagram of the auxiliary reinforcement component of the present invention.

[0039] In the diagram: 1. Movable rod assembly; 101. Handle bracket; 102. Top opening; 103. Internal cavity; 104. Through hole; 105. Side groove; 106. Curved hole; 2. Fixed rod assembly; 201. Support frame; 202. Reinforcing frame; 203. Locking hole; 204. Locking block; 3. Control handle; 31. Pressing plate; 32. Connecting plate; 33. Spring No. 1; 34. Control rod; 4. Inner frame; 41. Movable frame; 42. Slide groove; 43. Opening No. 1; 44. Opening No. 2; 5. Positioning adjustment assembly; 51. Guide. 52. Frame; 53. Positioning block; 54. Top groove; 55. Crank rod; 56. No. 2 spring; 57. Connecting sleeve; 68. Distribution assembly; 69. Fixing sleeve; 60. Connecting frame; 61. Side frame; 72. Auxiliary reinforcing assembly; 73. Fixing block; 74. No. 1 cavity; 75. Auxiliary clamping block; 76. No. 3 spring; 80. Intermediate cavity; 97. Connecting hole; 98. Connecting pipe; 99. Adjustment control assembly; 90. Distribution sleeve; 91. Side sleeve; 92. Threaded rod; 93. Fixing ring; 94. Limiting ring; 95. Bypass hole. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] like Figures 1 to 11As shown, this embodiment of the invention provides a reinforced pull rod for a suitcase and a reinforcement method thereof, including a movable rod assembly 1 and a fixed rod assembly 2. The movable rod assembly 1 is movably sleeved on the top of the fixed rod assembly 2. A control handle 3 is movably installed inside the movable rod assembly 1. An inner frame 4 is fixedly connected to the lower end of the movable rod assembly 1. The inner frame 4 is movably sleeved inside the fixed rod assembly 2. A positioning adjustment assembly 5 is provided at the lower part inside the inner frame 4. A distribution assembly 6 is provided at the top of the positioning adjustment assembly 5. The top of the distribution assembly 6 is movably installed with the lower end of the control handle 3. An auxiliary reinforcement assembly 7 is provided inside the inner frame 4. A connecting pipe 8 is fixedly connected between the auxiliary reinforcement assembly 7 and the movable rod assembly 1. An adjustment control assembly 9 is fixedly connected to the ground of the movable rod assembly 1.

[0042] The movable rod assembly 1 includes a handle frame 101, a top opening 102, an inner cavity 103, a through hole 104, a side groove 105, and a curved hole 106;

[0043] The inner frame 4 includes a movable frame 41, a slide 42, a first opening 43, and a second opening 44;

[0044] The positioning adjustment assembly 5 includes a guide frame 51, a positioning block 52, a top groove 53, a crank 54, a second spring 55, and a connecting sleeve 56;

[0045] The auxiliary reinforcement component 7 includes a fixing block 71, a first cavity 72, an auxiliary clamping block 73, a third spring 74, an intermediate cavity 75, and a connecting hole 76;

[0046] The adjustment and control assembly 9 includes a distribution sleeve 91, a side sleeve 92, a threaded rod 93, a retaining ring 94, a limiting ring 95, and a bypass hole 96.

[0047] Example: In use, pressing the control handle 3 causes the pressing plate 31 to move down along the top opening 102, causing the connecting plate 32 to move down along the internal cavity 103, thereby causing the control rod 34 to move down. The lower end of the control rod 34 moves down in the fixed sleeve 61 and squeezes the storage fluid in the distribution component 6, causing the hydraulic pressure in the distribution component 6 to rise. This hydraulic pressure acts on the upper end surface of the crank 54 through the side frame 63, pushing the crank 54 to move laterally. This causes the positioning block 52 in the positioning adjustment component 5 to move laterally and move out of the locking hole 203 in the fixed rod assembly 2, releasing the initial locking. Pulling the movable rod assembly 1 upward causes the handle 101 to move the inner frame 4 up along the inside of the reinforcing frame 202 and extend for adjustment. When the target height is reached, releasing the control handle 3 causes the positioning block 52 in the positioning adjustment component 5 to be elastically reset by the internal second spring 55, move outward and automatically fit into the fixed rod assembly. In the locking hole 203 of component 2, the locking holes 203 on both sides of the reinforcing frame 202 are simultaneously engaged to complete the initial reinforcement. The threaded rod 93 in the rotating adjustment control component 9 is rotated upward and the fixing ring 94 is moved upward in the distribution sleeve 91, squeezing the liquid stored inside the distribution sleeve 91, thereby increasing the hydraulic pressure. The increased hydraulic pressure acts on the auxiliary reinforcing component 7 through the connected curved hole 106, thereby increasing the hydraulic pressure in the connected auxiliary reinforcing component 7. Under the hydraulic pressure, the auxiliary clamping block 73 extends along the second opening 44 and presses against the inner wall of the reinforcing frame 202, completing the further auxiliary reinforcement. When it is necessary to stretch out for a long time and pull the suitcase, as the further reinforcement operation is completed, the threaded rod 93 moves upward along the through hole 104 into the inner cavity 103 and abuts against the connecting plate 32 in the control handle 3 from the bottom, completing the locking. The control handle 3 cannot move down, completing the limited locking.

[0048] First, by pressing down the control handle 3, the hydraulic pressure in the distribution component 6 is increased, pushing the locked positioning block 52. After adjusting to the appropriate extension position, the positioning blocks 52 on both sides are reset, causing the positioning blocks 52 on both sides inside the reinforcing frame 202 to move synchronously and engage in the locking hole 203 to complete the initial locking. In conjunction with the upward movement of the threaded rod 93 in the adjustment control component 9, the hydraulic pressure in the distribution sleeve 91 is compressed again. Under the action of hydraulic pressure, the auxiliary reinforcing component 7 distributed in the inner frame 4 is activated. After completing the initial adjustment and locking, the auxiliary clamping block 73 extends and acts on the inner wall of the reinforcing frame 202, further enhancing the positioning reinforcement of the pull rod in the trolley case. This avoids locking failure and locking wobbling caused by breakage or vibration, greatly enhancing the structural stability and pull rod strength, preventing locking failure, and improving the stability of use.

[0049] Furthermore, by utilizing the adjustment control component 9 again, after completing the auxiliary reinforcement and strengthening the positioning of the extended pull rod, the control handle 3 is limited from the bottom in conjunction with the movement extension of the threaded rod 93. This restricts the downward movement of the control handle 3, preventing accidental release of the positioning latch between the movable rod component 1 and the fixed rod component 2 during prolonged use. This provides better stability for items requiring safe transportation and avoids damage to the transported items inside the box caused by vibrations during accidental extension and retraction.

[0050] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the top opening 102 and the inner cavity 103 are respectively opened on the top and inside of the handle frame 101. The through hole 104 and the side groove 105 are respectively opened on the bottom and side of the handle frame 101. The inner cavity 103 is connected to the top opening 102 and the through hole 104. The curved hole 106 is opened inside the handle frame 101. The two ends of the curved hole 106 are respectively located on the bottom and inner side of the handle frame 101. The fixing rod assembly 2 includes a support frame 201, a reinforcing frame 202, a locking hole 203 and a locking block. 204, the reinforcing frame 202 is fixedly sleeved inside the support frame 201, the locking hole 203 is opened on the inner surface of the reinforcing frame 202, the locking block 204 is fixedly connected to the upper part of the inner surface of the support frame 201, the movable frame 41 is fixedly connected to the bottom of the handle frame 101 and connected to the internal cavity 103, the slide groove 42 is opened on the side of the movable frame 41, the first opening 43 and the second opening 44 are respectively opened on the side and the back of the movable frame 41, and the movable frame 41 is movably sleeved inside the reinforcing frame 202.

[0051] The flow channel is connected by using the curved hole 106 and the connecting pipe 8, which facilitates the control of hydraulic pressure. The fixed rod assembly 2 is used to fix it on the side of the bag to maintain stability. The movable rod assembly 1 is used to pull out and perform a pulling operation. The inner frame 4 moves in the reinforcing frame 202 to ensure stability when changing position. The locking block 204 is adapted to the sliding groove 42 and the side groove 105 to prevent the inner frame 4 from sliding directly out of the reinforcing frame 202.

[0052] like Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 9 and Figure 10As shown, the guide frame 51 is fixedly connected to the bottom of the movable frame 41, the positioning blocks 52 are symmetrically distributed inside the guide frame 51, the second spring 55 is fixedly connected between adjacent positioning blocks 52, the positioning blocks 52 are movably sleeved in the first opening 43, the crank rod 54 is fixedly connected to the top surface of the positioning blocks 52, the connecting sleeve 56 is fixedly sleeved on the side of the movable frame 41, one end of the crank rod 54 is movably sleeved in the connecting sleeve 56, the distribution component 6 includes a fixed sleeve 61, a connecting frame 62 and a side frame 63, one end of the side frame 63 is fixedly connected to the connecting sleeve 56, the other end of the side frame 63 is fixedly connected to the connecting frame 62, the connecting frame 62 is located above the positioning adjustment component 5, and the fixed sleeve 61 is fixedly connected to the top of the connecting frame 62.

[0053] By utilizing the positioning adjustment component 5 to achieve synchronous engagement on both sides inside the reinforcing frame 202, the positioning strength is initially enhanced, and the second spring 55 facilitates elastic reset, aligning the distributed second opening 44 and guide frame 51, facilitating the movement of the positioning block 52 and achieving positioning engagement. Hydraulic oil is injected into the distribution component 6 to transmit hydraulic pressure, change the direction of control force, and achieve synchronous control of the symmetrically distributed positioning blocks 52.

[0054] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 7 As shown, the control handle 3 includes a pressing plate 31, a connecting plate 32, a first spring 33, and a control rod 34. The pressing plate 31 is movably sleeved inside the top opening 102. The connecting plate 32 is movably sleeved inside the inner cavity 103 and fixedly connected to the bottom surface of the pressing plate 31. One end of the first spring 33 is fixedly connected to the connecting plate 32, and the other end of the first spring 33 is fixedly connected to the bottom surface of the inner cavity 103. One end of the control rod 34 is fixedly connected to the bottom surface of the connecting plate 32, and the other end of the control rod 34 passes through the auxiliary reinforcing component 7 and is movably sleeved inside the fixed sleeve 61.

[0055] Control is achieved by using the control handle 3. When the connecting plate 32 moves, the control rod 34 pressurizes the distribution component 6 to provide control power and complete the unlocking. The first spring 33 uses its elasticity to facilitate reset.

[0056] like Figure 2 , Figure 4 and Figure 11As shown, the fixed block 71 is fixedly installed inside the movable frame 41 and is movably connected to the control rod 34. The first cavity 72 and the intermediate cavity 75 are both opened inside the fixed block 71. The first cavity 72 is connected to the intermediate cavity 75. The auxiliary clamping block 73 is movably connected inside the first cavity 72 and the second opening 44. One end of the third spring 74 is fixedly connected to the auxiliary clamping block 73, and the other end of the third spring 74 is fixedly connected to the first cavity 72. The connecting hole 76 is opened on the top of the fixed block 71 and is connected to the first cavity 72. The first cavity 72 is connected to the second opening 44. The lower end of the connecting pipe 8 is fixedly connected to the top of the fixed block 71 and is connected to the connecting hole 76. The upper end of the connecting pipe 8 is fixedly connected to the bottom surface of the handle frame 101 and is connected to the curved hole 106.

[0057] By utilizing the auxiliary reinforcing component 7 to complete the auxiliary clamping and fixing, and with the increase of hydraulic pressure inside the first cavity 72, the auxiliary clamping block 73 is pushed to move, and the third spring 74 is stretched to further clamp and fix the inner frame 4 and the reinforcing frame 202, maintaining stability. The third spring 74 is used for elastic reset.

[0058] like Figure 1 ,picture, Figure 7 and Figure 8 As shown, the distribution sleeve 91 is fixedly connected to the handle bracket 101 and communicates with the through hole 104. The side sleeve 92 is fixedly connected to the side of the distribution sleeve 91 and communicates with the curved hole 106. The threaded rod 93 is threadedly sleeved on the bottom of the distribution sleeve 91. The fixing ring 94 is fixedly sleeved on the outer surface of the threaded rod 93 and movably sleeved inside the distribution sleeve 91. The limiting ring 95 is fixedly sleeved inside the through hole 104 and sleeved on the outer side of the threaded rod 93. The bypass hole 96 is opened at the bottom of the distribution sleeve 91.

[0059] Hydraulic enhancement control is achieved by using the adjustment control component 9 to realize the action of the auxiliary reinforcement components 7 on both sides, complete the auxiliary reinforcement, improve the positioning stability after telescopic adjustment, and reduce shaking. The bypass hole 96 is used to maintain air pressure stability and ensure that the fixed ring 94 can move upward stably. The cavity between the fixed ring 94 and the limit ring 95 is a compression cavity.

[0060] A method for strengthening the pull rod of a suitcase includes the following strengthening steps:

[0061] Step 1: When using, press the control handle 3 to move the control lever 34 down and squeeze the storage liquid in the dispensing component 6, so that the hydraulic pressure pushes the positioning block 52 in the positioning adjustment component 5 out of the fixed rod assembly 2, and pulls the movable rod assembly 1 upward to perform stretching adjustment;

[0062] Step 2: When the target height is reached, release the control handle 3. The positioning block 52 in the positioning adjustment component 5 moves outward under the elastic reset action of the internal second spring 55 and automatically fits into the locking hole 203 of the fixed rod component 2. The locking holes 203 on both sides of the inside of the reinforcing frame 202 are simultaneously engaged, completing the initial reinforcement.

[0063] Step 3: Rotate the threaded rod 93 in the adjustment control component 9 so that the fixed ring 94 moves up in the distribution sleeve 91 and squeezes the internal storage liquid, thereby increasing the hydraulic pressure in the curved hole 106 and increasing the hydraulic pressure in the auxiliary reinforcing component 7 connected below. Under the hydraulic push, the auxiliary clamping block 73 extends along the second port 44 and clamps the inside of the reinforcing frame 202, completing the further reinforcement.

[0064] Step 4: When the suitcase needs to be extended for a long time and pulled, as the further reinforcement is completed, the threaded rod 93 moves up along the through hole 104 into the inner cavity 103 and abuts against the connecting plate 32 in the control handle 3 from the bottom to complete the locking.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A reinforced pull rod for a suitcase, comprising a movable rod assembly (1) and a fixed rod assembly (2), characterized in that: The movable rod assembly (1) is movably sleeved on the top of the fixed rod assembly (2). A control handle (3) is movably installed inside the movable rod assembly (1). The lower end of the movable rod assembly (1) is fixedly connected to an inner frame (4). The inner frame (4) is movably sleeved inside the fixed rod assembly (2). A positioning adjustment assembly (5) is provided at the bottom inside the inner frame (4). A distribution assembly (6) is provided at the top of the positioning adjustment assembly (5). The top of the distribution assembly (6) is movably installed with the lower end of the control handle (3). An auxiliary reinforcing assembly (7) is provided inside the inner frame (4). A connecting pipe (8) is fixedly connected between the auxiliary reinforcing assembly (7) and the movable rod assembly (1). An adjustment control assembly (9) is fixedly connected to the bottom surface of the movable rod assembly (1). The movable rod assembly (1) includes a handle frame (101), a top opening (102), an inner cavity (103), a through hole (104), a side groove (105), and a curved hole (106). The top opening (102) and the inner cavity (103) are respectively opened on the top and inside of the handle frame (101). The through hole (104) and the side groove (105) are respectively opened on the bottom and side surfaces of the handle frame (101). The inner cavity (103) is connected to the top opening (102) and the through hole (104). The curved hole (106) is opened inside the handle frame (101). The two ends of the curved hole (106) are respectively located on the bottom and inner surfaces of the handle frame (101). The inner frame (4) includes a movable frame (41), a slide (42), a first opening (43) and a second opening (44). The movable frame (41) is fixedly connected to the bottom of the handle frame (101) and connected to the inner cavity (103). The slide (42) is opened on the side of the movable frame (41). The first opening (43) and the second opening (44) are respectively opened on the side and back of the movable frame (41). The movable frame (41) is movably fitted inside the reinforcing frame (202). The positioning adjustment assembly (5) includes a guide frame (51), positioning blocks (52), a top groove (53), a crank (54), a second spring (55), and a connecting sleeve (56). The guide frame (51) is fixedly connected to the bottom inside the movable frame (41). The positioning blocks (52) are symmetrically distributed inside the guide frame (51). The second spring (55) is fixedly connected between adjacent positioning blocks (52). The positioning blocks (52) are movably fitted into the first opening (43). The crank (54) is fixedly connected to the top surface of the positioning blocks (52). The connecting sleeve (56) is fixedly fitted onto the side of the movable frame (41), and one end of the crank (54) is movably fitted into the connecting sleeve (56). The distributing component (6) includes a fixed sleeve (61), a connecting frame (62), and a side frame (63). One end of the side frame (63) is fixedly connected to the connecting sleeve (56), and the other end of the side frame (63) is fixedly connected to the connecting frame (62). The connecting frame (62) is located above the positioning adjustment component (5), and the fixed sleeve (61) is fixedly connected to the top of the connecting frame (62). The auxiliary reinforcing component (7) includes a fixed block (71), a first cavity (72), an auxiliary clamping block (73), a third spring (74), an intermediate cavity (75), and a connecting hole (76). The fixed block (71) is fixedly installed inside the movable frame (41) and movably connected to the control rod (34). The first cavity (72) and the intermediate cavity (75) are both opened inside the fixed block (71), and the first cavity (72) and the intermediate cavity (75) are connected. The auxiliary clamping block (73) is movably connected inside the first cavity (72) and the second opening (44). One end of the No. 3 spring (74) is fixedly connected to the auxiliary clamping block (73), and the other end of the No. 3 spring (74) is fixedly connected to the inside of the No. 1 cavity (72). The connecting hole (76) is opened on the top of the fixed block (71) and is connected to the No. 1 cavity (72). The No. 1 cavity (72) is connected to the No. 2 port (44). The lower end of the connecting tube (8) is fixedly connected to the top of the fixed block (71) and is connected to the connecting hole (76). The upper end of the connecting tube (8) is fixedly connected to the bottom surface of the handle frame (101) and is connected to the curved hole (106). The adjustment control assembly (9) includes a distribution sleeve (91), a side sleeve (92), a threaded rod (93), a fixing ring (94), a limiting ring (95), and a bypass hole (96). The distribution sleeve (91) is fixedly connected to the handle bracket (101) and communicates with the through hole (104). The side sleeve (92) is fixedly connected to the side of the distribution sleeve (91) and communicates with the curved hole (106). The threaded rod (93) is threadedly sleeved on the bottom of the distribution sleeve (91). The fixing ring (94) is fixedly sleeved on the outer surface of the threaded rod (93) and movably sleeved inside the distribution sleeve (91). The limiting ring (95) is fixedly sleeved inside the through hole (104) and sleeved on the outer side of the threaded rod (93). The bypass hole (96) is opened at the bottom of the distribution sleeve (91). The fixing rod assembly (2) includes a support frame (201), a reinforcing frame (202), a locking hole (203), and a locking block (204). The reinforcing frame (202) is fixedly sleeved inside the support frame (201), and the locking hole (203) is opened on the inner surface of the reinforcing frame (202). The control handle (3) includes a pressing plate (31), a connecting plate (32), a first spring (33), and a control rod (34). The pressing plate (31) is movably sleeved inside the top opening (102). The connecting plate (32) is movably sleeved inside the inner cavity (103) and fixedly connected to the bottom surface of the pressing plate (31). One end of the first spring (33) is fixedly connected to the connecting plate (32). One end of the control rod (34) is fixedly connected to the bottom surface of the connecting plate (32). The other end of the control rod (34) passes through the auxiliary reinforcing component (7) and is movably sleeved inside the fixed sleeve (61). Both the dispensing component (6) and the dispensing sleeve (91) are equipped with storage liquid.

2. The reinforced pull rod for a suitcase according to claim 1, characterized in that: The card block (204) is fixedly connected above the inner surface of the support frame (201).

3. The reinforced pull rod for a suitcase according to claim 1, characterized in that: The other end of the first spring (33) is fixedly connected to the bottom surface of the inner cavity (103).

4. A method for strengthening the pull rod of a suitcase according to any one of claims 1-3, characterized in that, The following reinforcement steps are included: Step 1: When using, press the control handle (3) to make the control lever (34) move down and squeeze the storage liquid in the dispensing component (6), so that the positioning block (52) in the hydraulically pushed positioning adjustment component (5) moves out of the fixed rod assembly (2), and pulls the movable rod assembly (1) upward to perform stretching adjustment; Step 2: When the target height is adjusted, release the control handle (3). The positioning block (52) in the positioning adjustment component (5) moves outward under the elastic reset action of the internal second spring (55) and automatically fits into the locking hole (203) of the fixed rod component (2). The locking holes (203) on both sides of the inside of the reinforcing frame (202) are locked in time to complete the initial reinforcement. Step 3: Rotate the threaded rod (93) in the adjustment control assembly (9) so that the fixing ring (94) moves up in the distribution sleeve (91) and squeezes the internal storage liquid, thereby increasing the hydraulic pressure. The hydraulic pressure in the curved hole (106) is increased, and the hydraulic pressure in the auxiliary reinforcing assembly (7) under the connection is increased. Under the hydraulic pressure, the auxiliary clamping block (73) extends along the second port (44) and clamps the inside of the reinforcing frame (202), thus completing the further reinforcement. Step 4: When it is necessary to stretch out for a long time and pull the suitcase, as the further reinforcement is completed, the threaded rod (93) moves up along the through hole (104) into the inner cavity (103) and abuts against the connecting plate (32) in the control handle (3) from the bottom to complete the locking.

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