Luggage pull rod with rebound damping

Abstract

The utility model relates to the technical field of luggage draw bars, in particular to a luggage draw bar with rebound damping, which comprises a luggage main body, a grip and draw bars, the two draw bars are fixedly connected at the lower end of the grip, a draw bar sliding limit structure is arranged inside the luggage main body, and the draw bar sliding limit structure is connected with the grip. A rebound damping buffer pull rod structure is arranged at the lower part in the luggage main body, and a luggage pull rod lifting limiting structure is arranged on one side of the pull rod. According to the luggage pull rod with the springback damping, when the pull rod needs to be retracted, the supporting plate transmits impact downward pressure to the telescopic piston, the telescopic piston extrudes air in the piston pipe to be extruded out along the small exhaust holes, most of the air is extruded, the air pressure serves as damping buffering to reduce the descending speed of the pull rod, and damping buffering is conducted through air compression; the luggage pull rod is simple, convenient and very effective, the situation that the pull rod downwards collides with a luggage structure is relieved, fingers of a user can be protected, and the practicability of the luggage pull rod with the rebound damping function is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of luggage pull rod, concretely to a luggage pull rod with resilience damping. BACKGROUND

[0002] The pull rod box refers to the luggage box with pull rod and wheels. It is widely used because of its convenience. At the same time, the pull rod box is also divided into single tube pull rod and double tube pull rod because of the pull rod on the box, and the pull rod is also divided into square tube and round tube to facilitate dragging when walking, greatly reducing the burden. The pull rod box can be carried by hand or dragged. The wheels of the pull rod box we use in daily life are basically located at the bottom of the box.

[0003] For example, the authorized announcement number "CN220916780U" is named a luggage pull rod. The threaded rod rotation will push the sleeve to move to the back, so as to be inserted with the connecting rod arranged on the back of the inner wall of the box body, so as to form support on the top of the inner wall of the box body for bearing, which can prevent the box from being opened during the process of jolting movement. The existing luggage pull rod, because the pull rod of the luggage needs to be manually pulled up and manually pressed to reset, the bottom end of the pull rod lacks additional damping buffer mechanism during the reset and retraction process, so the bottom end of the falling pull rod will directly knock and collide with the top end of the luggage, not only will produce a larger sound, but also may be injured because the user's hand does not timely pull out the pull rod range, which affects the actual use effect of the luggage pull rod. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the problem of poor actual use effect of the existing luggage pull rod, and provides a luggage pull rod with resilience damping.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0006] A kind of luggage pull rod with resilience damping is designed, including luggage main body, handle and pull rod, two pull rods are fixedly connected at the lower end of handle, two pull rods are slidably arranged in the inner side of luggage main body, the bottom end of the luggage main body is movably connected with a plurality of universal wheels, the inside of the luggage main body is provided with pull rod sliding limit structure, the lower part of the inside of the luggage main body is provided with resilience damping buffer pull rod structure, one side of the pull rod is provided with luggage pull rod lifting limit structure, the lower end of the handle is fixedly connected with reserved buckle.

[0007] Preferably, the pull rod sliding limit structure includes a sliding groove and a connecting rope, two sliding grooves are fixedly provided in the inside of the luggage main body, two sliding grooves are slidably connected with a limiting block on the inner side, the lower end of two limiting blocks is fixedly connected with a connecting rope, and the top end of two limiting blocks is fixedly connected with the lower end of the pull rod.

[0008] Preferably, the rebound damping buffer pull rod structure includes a support plate and a piston tube, two piston tubes are fixedly connected below the inside of the luggage main body, the inside of two piston tubes is slidably sleeved with a telescopic piston, the top end of two telescopic pistons is fixedly connected with a support plate, the lower end of two piston tubes is fixedly provided with an exhaust small hole, and the outside of the exhaust small hole is fixedly connected with a shielding cloth.

[0009] Preferably, two support plates are slidably connected to the lower end of the sliding groove, two shielding cloths are fixedly connected to the rear side of the outer wall of the luggage main body, and the top end of two support plates is fixedly connected with the lower end of the connecting rope.

[0010] Preferably, the luggage pull rod lifting limiting structure includes a conical groove and a button, the button is movably installed at the top end of the luggage main body, a plurality of conical grooves are fixedly provided on the outer wall of one side of the pull rod, the lower end of the button is fixedly connected with a pressing rod, the bottom end of the pressing rod is fixedly connected with a pulling line, the other lower end of the button is fixedly connected with a return spring, the inside of the luggage main body is rotatably connected with a movable shaft, one side of the movable shaft is fixedly connected with a limiting block, the top end of the limiting block is fixedly connected with the other end of the pulling line, the inside of the upper side of the luggage main body is rotatably connected with a pulley, and the outer wall of the pulley is slidably connected with the pulling line.

[0011] Preferably, the other end of the return spring is fixedly connected to the inside of the luggage main body, and the end of the limiting block is movably connected with the inside of the conical groove.

[0012] The utility model provides a kind of luggage pull rod with rebound damping, beneficial effect lies in: when pull rod needs to be retracted, the bottom end limiting block of the pull rod that quickly drops will quickly contact support plate, support plate will impact the transmission of pressure to telescopic piston, and air in piston tube is extruded along exhaust small hole by telescopic piston extrusion, because exhaust small hole can exhaust flow limited, most air will be extruded by gas pressure to be used as damping buffer to reduce the speed of pull rod, and damping buffer is carried out by gas compression, simple and convenient and very effective, alleviate the situation that pull rod knocks down luggage structure, also can protect the fingers of user, improve the practicality of the luggage pull rod with rebound damping. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0014] Figure 2 It is Figure 1 front sectional view schematic diagram;

[0015] Figure 3 It is Figure 1 top view schematic diagram;

[0016] Figure 4For Figure 2 Enlarged sectional view of middle A part;

[0017] Figure 5 For Figure 2 Enlarged sectional view of middle B part;

[0018] Figure 6 For Figure 2 Enlarged sectional view of middle C part.

[0019] In the figure: 1, the main body of the bag, 2, the handle, 3, the pull rod, 4, the universal wheel, 5, the pull rod sliding limiting structure, 51, the sliding groove, 52, the limiting block, 53, the connecting rope, 6, the rebound damping buffer pull rod structure, 61, the supporting plate, 62, the telescopic piston, 63, the piston tube, 64, the exhaust small hole, 65, the shielding cloth, 7, the bag pull rod lifting limiting structure, 71, the conical groove, 72, the pulling line, 73, the limiting block, 74, the movable shaft, 75, the pulley, 76, the pressing rod, 77, the button, 78, the reset spring, 8, the reserved hand. DETAILED DESCRIPTION

[0020] The utility model will be further described below in combination with the drawings:

[0021] Please refer to Figures 1-6 In the embodiment, a bag pull rod with rebound damping includes a bag main body 1, a handle 2 and a pull rod 3, two pull rods 3 are fixedly connected to the lower end of the handle 2, the handle 2 is made of relatively soft and comfortable plastic material, the handle 2 is transversely fixed above the two pull rods 3, which facilitates the user to hold, the two pull rods 3 are slidingly arranged on the inner side of the bag main body 1, the bottom end of the bag main body 1 is movably connected with a plurality of universal wheels 4, the universal wheels 4 can be the mature bag universal wheels at the present stage, which can freely rotate and roll, facilitating the bag to be dragged on the ground.

[0022] The bag main body 1 is internally provided with a pull rod sliding limiting structure 5, the bag main body 1 is internally provided with a rebound damping buffer pull rod structure 6 below, one side of the pull rod 3 is provided with a bag pull rod lifting limiting structure 7, the lower end of the handle 2 is fixedly connected with a reserved hand 8, the reserved hand 8 is excavated in the lower end of the handle 2, which can conveniently enable the user's fingers to be inserted into the handle 2, and can also reserve a certain operation space for the lower button 77.

[0023] The pull rod sliding limiting structure 5 comprises sliding grooves 51 and connecting ropes 53. The two sliding grooves 51 are fixedly arranged in the inner part of the bag main body 1. The inner sides of the two sliding grooves 51 are slidably connected with limiting blocks 52. The limiting blocks 52 can slide up and down in the sliding grooves 51. The diameter of the limiting blocks 52 is larger than the top exit position of the sliding grooves 51, so that the pull rod 3 can be limited to slide in the sliding grooves 51 without being separated from the inner side of the bag main body 1. The lower ends of the two limiting blocks 52 are fixedly connected with the connecting ropes 53. The connecting ropes 53 are made of nylon ropes and are used to lock the supporting plates 61 which can slide in the piston pipes 63. When the pull rod 3 is retracted in the sliding grooves 51, the bag main body 1 is in a placed state. When the pull rod 3 is pulled out of the sliding grooves 51, the bag main body 1 is in a movable state. The top ends of the two limiting blocks 52 are fixedly connected with the lower end of the pull rod 3.

[0024] The rebound damping buffer pull rod structure 6 comprises supporting plates 61 and piston pipes 63. The two piston pipes 63 are fixedly connected to the inner lower part of the bag main body 1. The piston pipes 63 are made of stainless steel metal materials with good sealing effect of outer wall. The inner sides of the two piston pipes 63 are slidably sleeved with telescopic pistons 62. The telescopic pistons 62 can tightly slide up and down in the inner sides of the piston pipes 63. The top ends of the two telescopic pistons 62 are fixedly connected with the supporting plates 61. The supporting plates 61 are used to support the lowermost limiting blocks 52 of the pull rod 3. The lower ends of the two piston pipes 63 are fixedly provided with exhaust small holes 64. The exhaust small holes 64 are designed to be very small, so that the gas flow passing through them is very limited.

[0025] The outer sides of the exhaust small holes 64 are fixedly connected with shielding cloths 65. The shielding cloths 65 are made of semi-transparent black gauze. The shielding cloths 65 can shield the small exhaust small holes 64 to ensure the appearance of the bag main body 1. The two supporting plates 61 are slidably connected to the inner lower ends of the sliding grooves 51. When the pull rod 3 is pulled up to drive the bag main body 1 to work, the connecting ropes 53 are pulled to be straight. At this time, the supporting plates 61 will drive the telescopic pistons 62 to be pulled up. The piston pipes 63 utilize the air pressure to suck the air outside into the inner sides of the exhaust small holes 64 and the inner lower ends of the piston pipes 63.

[0026] When the pull rod 3 needs to be retracted, the bottom end of the pull rod 3 will quickly contact the supporting plate 61, and the supporting plate 61 will transmit the impact downward pressure to the telescopic piston 62, and the air in the piston pipe 63 is extruded along the exhaust small hole 64, because the exhaust small hole 64 has limited exhaust flow, most of the air is extruded by the gas pressure as a damping buffer to reduce the speed of the pull rod 3, so that the pull rod 3 and the handle 2 will not directly knock on the top end of the bag body 1, until the gas in the piston pipe 63 is exhausted, the limiting block 52 pushes the telescopic piston 62 into the piston pipe 63, the handle 2 is attached to the top end of the bag body 1, and the pull rod 3 is successfully retracted into the bag body 1, and the two shielding cloths 65 are fixedly connected to the rear side of the outer wall of the bag body 1, and the top end of the two supporting plates 61 is fixedly connected with the lower end of the connecting rope 53.

[0027] When the pull rod 3 is pulled upward to drive the bag body 1 to work, the connecting rope 53 is pulled taut, and the supporting plate 61 drives the telescopic piston 62 to be pulled upward, and the air in the piston pipe 63 is sucked into the exhaust small hole 64 and the lower end of the piston pipe 63 by the gas pressure.

[0028] Therefore, most of the air is extruded by the gas pressure as a damping buffer to reduce the speed of the pull rod 3, so that the pull rod 3 and the handle 2 will not directly knock on the top end of the bag body 1, until the gas in the piston pipe 63 is exhausted, the limiting block 52 pushes the telescopic piston 62 into the piston pipe 63, the handle 2 is attached to the top end of the bag body 1, and the pull rod 3 is successfully retracted into the bag body 1, and the damping buffer is achieved by gas compression, which is simple, convenient and effective, and can alleviate the situation that the pull rod 3 knocks on the bag structure downward, and can also protect the fingers of the user, and improve the practicability of the bag pull rod with rebound damping.

[0029] The bag pull rod lifting limiting structure 7 comprises a conical groove 71 and a button 77, the button 77 is movably installed at the top end of the bag body 1, the button 77 can be manually pressed at the top end of the bag body 1, and a plurality of conical grooves 71 are fixedly arranged on one side of the outer wall of the pull rod 3.

[0030] The lower end of the button 77 is fixedly connected with a downward rod 76, the bottom end of the downward rod 76 is fixedly connected with a pulling line 72, the other side of the lower end of the button 77 is fixedly connected with a reset spring 78, the inner side of the luggage body 1 is rotatably connected with a movable shaft 74, one side of the movable shaft 74 is fixedly connected with a limiting block 73, when it is needed to unlock the limiting block 73 to the downward rod 3, the operator only needs to press the button 77, the button 77 pushes the downward rod 76 downward, at the same time, the reset spring 78 is extruded and shrunk to accumulate potential energy, the lower end of the downward rod 76 can pull the pulling line 72 to one side.

[0031] Then the pulling line 72 can guide the other end of the limiting block 73 upward along the pulley 75, so that the front end of the limiting block 73 cannot abut against the conical groove 71, and the pull rod 3 can slide up and down freely, finally, when the pull rod 3 is retracted or needs to be fixed, the button 77 is released, the potential energy of the reset spring 78 is released, so that the limiting block 73 loses the lifting force and can return to the original position, the top end of the limiting block 73 is fixedly connected with the other end of the pulling line 72, the inner side of the upper end of the luggage body 1 is rotatably connected with the pulley 75, and the outer wall of the pulley 75 is slidably connected with the pulling line 72.

[0032] The other end of the reset spring 78 is fixedly connected in the inner side of the luggage body 1, and the end of the limiting block 73 is movably connected with the inner side of the conical groove 71.

[0033] Working principle:

[0034] The luggage pull rod with rebound damping is used in daily life travel luggage or office luggage, which can be stretched by pulling to facilitate the carrying and transportation of the luggage;

[0035] The main functional structure of the luggage pull rod with rebound damping:

[0036] The handle 2 is made of soft and comfortable plastic material, the handle 2 is fixed transversely above the two pull rods 3, which is convenient for the user to hold, the universal wheel 4 adopts the mature luggage universal wheel at the present stage, which can rotate and roll freely, which is convenient for the luggage to be dragged on the ground, the reserved buckle hand 8 is excavated at the lower end of the handle 2, which can conveniently pass the fingers into the handle 2, and can also reserve a certain operation space for the lower button 77;

[0037] The pull rod pulling assembly of the luggage pull rod with rebound damping:

[0038] The limiting block 52 can slide up and down inside the sliding groove 51, and the diameter of the limiting block 52 is larger than the top outlet position of the sliding groove 51, so that the pull rod 3 can limit the sliding of the sliding groove 51 inside the bag main body 1, and the connecting rope 53 is made of nylon rope and is connected to the bottom end of the supporting plate 61 which can slide inside the piston pipe 63. When the pull rod 3 is retracted inside the sliding groove 51, the bag main body 1 is in a placed state, and when the pull rod 3 is pulled out inside the sliding groove 51, the bag main body 1 is in a movable state;

[0039] The pull rod rebound damping structure of the bag pull rod with rebound damping:

[0040] The piston pipe 63 is made of stainless steel material with good sealing effect, and the two piston pipes 63 are slidably sleeved with the telescopic piston 62 inside. The telescopic piston 62 can tightly fit inside the piston pipe 63 and slide up and down, and the supporting plate 61 is used to support the lowermost limiting block 52 of the pull rod 3. The exhaust small hole 64 is designed very small, so that the gas flow through it is very limited. The shielding cloth 65 is made of semi-transparent black gauze, which can shield the small exhaust small hole 64 and ensure the appearance of the bag main body 1;

[0041] When the pull rod 3 is pulled up to drive the bag main body 1 to work, the connecting rope 53 is pulled straight, and the supporting plate 61 drives the telescopic piston 62 to pull up. The piston pipe 63 uses air pressure to suck air from the outside into the inside of the exhaust small hole 64 and the lower end of the piston pipe 63. When the pull rod 3 needs to be retracted, the bottom limiting block 52 of the pull rod 3 will quickly contact the supporting plate 61, and the supporting plate 61 will transmit the impact downward pressure to the telescopic piston 62. The telescopic piston 62 extrudes the air inside the piston pipe 63 and pushes it out along the exhaust small hole 64. Because the exhaust small hole 64 has limited exhaust flow, most of the air will be extruded through the gas pressure as damping buffer to reduce the speed of the pull rod 3, so that the pull rod 3 and the handle 2 will not directly knock against the top end of the bag main body 1. Until the gas inside the piston pipe 63 is completely discharged, the limiting block 52 pushes the telescopic piston 62 into the piston pipe 63, the handle 2 is attached to the top end of the bag main body 1, and the pull rod 3 is successfully retracted inside the bag main body 1. The gas compression is used for damping buffer, which is simple, convenient and effective, and can relieve the situation that the pull rod 3 knocks against the bag structure, and can also protect the user's fingers;

[0042] The pull rod extension limiting and fixing structure of the bag pull rod with rebound damping:

[0043] First, the button 77 can be pressed manually at the top of the bag body 1, the conical groove 71 is inclined triangularly carved on the side wall of the pull rod 3, when the pull rod 3 is pulled up, the inclined conical groove 71 will contact the lower end of the arc surface of the limiting block 73, so that the limiting block 73 will not limit the normal rise of the pull rod 3, but when the pull rod 3 is lowered, the internal inclination angle of the conical groove 71 will be resisted by the protruding angle at the end of the limiting block 73, so that the limiting block 73 can resist the descent of the pull rod 3 and play a role in limiting the falling of the pull rod 3;

[0044] When it is necessary to unlock the limiting block 73 to the descent of the pull rod 3, the operator only needs to press the button 77, the button 77 pushes the lower push rod 76 downward, and at the same time the reset spring 78 is extruded and shrunk to accumulate potential energy, the lower end of the push rod 76 can pull the pull line 72 to one side, then the pull line 72 will guide the other end of the limiting block 73 upward along the pulley 75, so that the front sharp corner of the limiting block 73 cannot be tightly resisted by the conical groove 71, and the pull rod 3 can be smoothly up and down, finally when the pull rod 3 is retracted or needs to be fixed, the button 77 is released, the potential energy of the reset spring 78 is released, so that the limiting block 73 loses the lifting force and can return to the original position.

[0045] Although the utility model has been illustrated and described by referring to the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details can be made within the scope of the claims.

Claims

1. A luggage pull rod with rebound damping, comprising a luggage body (1), a handle (2) and a pull rod (3), two of the pull rods (3) are fixedly connected at the lower end of the handle (2), and the two pull rods (3) are slidingly arranged on the inner side of the luggage body (1), characterized in that: The bottom end of the luggage body (1) is movably connected with a plurality of universal wheels (4), the inside of the luggage body (1) is provided with a pull rod sliding limiting structure (5), the lower inside of the luggage body (1) is provided with a rebound damping buffer pull rod structure (6), one side of the pull rod (3) is provided with a luggage pull rod lifting limiting structure (7), and the lower end of the handle (2) is fixedly connected with a reserved buckle hand (8).

2. The luggage trolley with bounce damping according to claim 1, characterized in that: The pull rod sliding limiting structure (5) comprises sliding grooves (51) and connecting ropes (53), two sliding grooves (51) are fixedly arranged in the inside of the luggage body (1), the inner sides of the two sliding grooves (51) are slidably connected with limiting blocks (52), the lower ends of the two limiting blocks (52) are fixedly connected with connecting ropes (53), and the top ends of the two limiting blocks (52) are fixedly connected with the lower end of the pull rod (3).

3. The luggage pull rod with rebound damping according to claim 1, wherein: The rebound damping buffer pull rod structure (6) comprises a supporting plate (61) and a piston pipe (63), two piston pipes (63) are fixedly connected to the lower inside of the luggage body (1), the inner sides of the two piston pipes (63) are slidably sleeved with telescopic pistons (62), the top ends of the two telescopic pistons (62) are fixedly connected with the supporting plate (61), the lower ends of the two piston pipes (63) are fixedly provided with exhaust small holes (64), and the outer sides of the exhaust small holes (64) are fixedly connected with shielding cloths (65).

4. The luggage trolley with bounce damping according to claim 3, characterized in that: The two supporting plates (61) are slidably connected to the lower end of the sliding groove (51), the two shielding cloths (65) are fixedly connected to the rear side of the outer wall of the luggage body (1), and the top ends of the two supporting plates (61) are fixedly connected with the lower end of the connecting rope (53).

5. The luggage pull rod with bounce damping according to claim 1, wherein: The luggage pull rod lifting limiting structure (7) comprises a conical groove (71) and a button (77), the button (77) is movably installed at the top end of the luggage body (1), a plurality of conical grooves (71) are fixedly arranged on the outer wall of one side of the pull rod (3), the lower end of the button (77) is fixedly connected with a pressing rod (76), the bottom end of the pressing rod (76) is fixedly connected with a pulling line (72), the other lower end of the button (77) is fixedly connected with a reset spring (78), the inner side of the luggage body (1) is rotatably connected with a movable shaft (74), one side of the movable shaft (74) is fixedly connected with a limiting block (73), the top end of the limiting block (73) is fixedly connected with the other end of the pulling line (72), the inner side of the luggage body (1) is rotatably connected with a pulley (75), and the outer wall of the pulley (75) is slidably connected with the pulling line (72).

6. The luggage trolley with bounce damping according to claim 5, characterized in that: The other end of the reset spring (78) is fixedly connected to the inside of the luggage body (1), and the end of the limiting block (73) is movably connected with the inner side of the conical groove (71).

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