A telescopic suitcase

Abstract

The present invention discloses a telescopic luggage case, which comprises a box body fixed tube, a box body moving tube, a telescopic rod, an upper box body and a lower box body; the lower end of the upper box body is sleeved outside the lower box body, and the capacity of the luggage case is adjusted by changing the relative positions of the upper box body and the lower box body; the upper end of the box body moving tube is fixedly connected with the upper box body, and a first locking member is arranged at the lower end of the box body moving tube; the box body fixed tube is fixedly connected with the lower box body, the lower end of the box body moving tube is sleeved inside the box body fixed tube, and the box body moving tube is locked on the box body fixed tube by the first locking member; a pulley for moving the luggage case is arranged at the bottom of the lower box body; the telescopic rod is arranged at the upper end of the box body moving tube, and the luggage case is pushed and pulled by the telescopic rod; the relative length of the box body fixed tube and the box body moving tube is adjusted by the first locking member, the capacity of the luggage case can be quickly adjusted, and the luggage case can be pushed and pulled by the telescopic rod, so that the flexibility is good and the use is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of luggage, and more specifically, to a telescopic luggage. Background Art

[0002] A luggage, also known as a travel suitcase or a pull rod box, is a box used to place items when going out, and it is one type of luggage. Usually, a luggage is used to place clothes, personal care products and souvenirs needed during a journey. The sizes of luggage on the market are generally based on the size regulations of carry-on luggage and checked luggage of airlines, and the usable space inside the box body is fixed and cannot be changed according to actual needs, so the flexibility is poor and the use is inconvenient. In order to meet people's requirements for the capacity of luggage, a luggage that can be telescoped in the height direction has emerged. However, the existing luggage pull rods cannot meet the usage requirements of the telescopic luggage. Summary of the Invention

[0003] The purpose of the present invention is to provide a telescopic luggage. The telescopic luggage can adjust the relative length of the box body fixed tube and the box body moving tube according to the actual telescopic height of the luggage, can quickly adjust the luggage capacity, and can push and pull the luggage through a telescopic rod, with good flexibility and convenient use.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A telescopic luggage, comprising a box body fixed tube, a box body moving tube, a telescopic rod, an upper box body and a lower box body; the lower end of the upper box body is sleeved outside the lower box body, and the luggage capacity is adjusted by changing the relative position of the upper box body and the lower box body; the upper end of the box body moving tube is fixedly connected to the upper box body, and a first locking member is arranged at the lower end of the box body moving tube; the box body fixed tube is fixedly connected to the lower box body, the lower end of the box body moving tube is sleeved inside the box body fixed tube, and the box body moving tube is locked on the box body fixed tube through the first locking member; a pulley for moving the luggage is arranged at the bottom of the lower box body; the telescopic rod is arranged at the upper end of the box body moving tube, and the luggage is pushed and pulled through the telescopic rod.

[0006] Furthermore, the upper box body includes an upper cavity and an upper cover arranged opposite to each other; an upper locking member is arranged between the upper cavity and the upper cover, and the upper cavity and the upper cover are detachably connected together through the upper locking member; the lower box body includes a lower cavity and a lower cover arranged opposite to each other; a lower locking member is arranged between the lower cavity and the lower cover, and the lower cavity and the lower cover are detachably connected together through the lower locking member.

[0007] Further, an upper limit strip is fixed to the lower end of the upper box body and extends upward to the upper end inside the upper box body; a lower limit strip is fixed to the upper end of the lower box body and extends downward to the lower end outside the lower box body; the upper limit strip is inserted into the gap between the lower limit strip and the lower box body from bottom to top, and the lower limit strip is inserted into the gap between the upper limit strip and the upper box body from top to bottom, so as to limit the maximum stretching length of the upper box body and the lower box body through the upper limit strip and the lower limit strip.

[0008] Further, the first locking member includes a first seat body, a plurality of first locking pins, a first spring and a first thrust member; the first seat body is fixedly arranged at the lower end of the box body moving pipe; a plurality of first locking holes are arranged at intervals from top to bottom on the box body fixing pipe; the first locking pin and the first spring are arranged in the first seat body, one end of the first locking pin is connected to the first spring, and the other end of the first locking pin is inserted into the first locking hole; the first thrust member is arranged on the first seat body, and the first locking pin is driven to retract into the first seat body through the first thrust member.

[0009] Further, the telescopic rod includes a push-pull fixed pipe and a push-pull moving pipe; the push-pull fixed pipe is sleeved inside the box body moving pipe and its lower end is fixed to one side of the upper end of the first seat body; a second locking member is arranged at the lower end of the push-pull moving pipe; the lower end of the push-pull moving pipe is sleeved inside the push-pull fixed pipe, and the push-pull moving pipe is locked to the push-pull fixed pipe through the second locking member.

[0010] Further, the second locking member includes a second seat body, a second locking pin, a second spring and a second thrust member; the second seat body is fixedly arranged at the lower end of the box body moving pipe; a plurality of second locking holes are arranged at intervals from top to bottom on the push-pull fixed pipe; the second locking pin and the second spring are arranged in the second seat body, one end of the second locking pin is connected to the second spring, and the other end of the second locking pin is inserted into the second locking hole; the second thrust member is arranged on the second seat body, and the second locking pin is driven to retract into the second seat body through the second thrust member.

[0011] Further, the number of the first locking pins is two, and the two first locking pins are arranged oppositely on both sides of the first seat body; the end parts of the first springs are respectively fixedly connected to the inner ends of the two first locking pins; a first inclined groove is arranged at the upper end of the first locking pin; the first thrust member is slidably arranged on the first seat body, and a first inclined convex part is arranged at the lower end of the first thrust member; a first connecting rod is fixed to the upper end of the first thrust member; the first connecting rod is located outside the push-pull fixed pipe, and the upper end of the first connecting rod extends out of the box body moving pipe, and the first locking pin is driven to retract into the first seat body by pressing down the first connecting rod to drive the first inclined convex part to move inwards in the first inclined groove.

[0012] Further, one end of the second spring is fixedly connected to the inner end of the second locking pin, and the other end of the second spring is fixedly connected to the second seat body; a second inclined groove is provided at the upper end of the second locking pin; the second thrust member is slidably disposed on the second seat body, and a second inclined convex portion is provided at the lower end of the second thrust member; a second connecting rod is fixed to the upper end of the second thrust member; the upper end of the second connecting rod extends out of the push-pull moving tube, and by pressing down the second connecting rod, the second inclined convex portion is driven to drive the second inclined groove to move inwards, so that the second locking pin retracts into the second seat body.

[0013] Further, two of the box body fixed tubes, the box body moving tubes and the telescopic rods are arranged opposite to each other left and right; an installation seat is fixed between the upper ends of the two box body moving tubes, and a handle is fixed between the upper ends of the two push-pull moving tubes; a first driving member is provided on the installation seat, and two oppositely arranged first connecting rods are pressed down by the first driving member; a second driving member is provided on the handle, and two oppositely arranged second connecting rods are pressed down by the second driving member.

[0014] Further, the first driving member includes a first driving key and two first driving rods respectively arranged on the sides of the first driving key; both ends of the first driving rod are inclined surfaces, and the first driving rod is slidably disposed on the installation seat; when the first driving key is pressed down, the two first driving rods are pushed to move outwards to press down the first connecting rod; a first driving spring is arranged inside the first driving rod, and both ends of the first driving spring are respectively connected to the first driving rod and the installation seat to make the first driving rod move inwards to reset; the second driving member includes a second driving key and two second driving rods respectively arranged on the sides of the second driving key; both ends of the second driving rod are inclined surfaces, and the second driving rod is slidably disposed on the handle; when the second driving key is pressed down, the two second driving rods are pushed to move outwards to press down the second connecting rod; a second driving spring is arranged inside the second driving rod, and both ends of the second driving spring are respectively connected to the second driving rod and the handle to make the second driving rod move inwards to reset.

[0015] After adopting the above technical solutions, the present invention has the following beneficial effects:

[0016] 1. The telescopic suitcase of the present invention can adjust the relative length of the box body fixed tube and the box body moving tube according to the actual telescopic height of the suitcase through the first locking member, can quickly adjust the capacity of the suitcase, and can push and pull the suitcase through the telescopic rod, with good flexibility and convenient use.

[0017] 2. For the telescopic suitcase of the present invention, the upper limit strip is embedded into the gap between the lower limit strip and the lower box body from bottom to top, and the lower limit strip is embedded into the gap between the upper limit strip and the upper box body from top to bottom. The maximum stretching length of the upper box body and the lower box body is limited by the upper limit strip and the lower limit strip, and the upper box body and the lower box body can be prevented from slipping off each other.

[0018] 3. The telescopic luggage of the present invention, wherein both the upper locking member and the lower locking member are zippers, and the zipper pulls of the upper locking member and the lower locking member are locked on the lock head, which is simple to operate and convenient to use.

[0019] 4. The telescopic luggage of the present invention, by pressing the first driving key, two first driving rods can be pushed to move outwards to press down the first connecting rod. The downward pressing of the first connecting rod drives the first inclined convex part to drive the first inclined groove to move inwards, so that the first locking pin retracts into the first seat body, enabling the box body moving tube to move along the box body fixed tube for adjusting the height of the luggage. After the height adjustment is completed, the first driving key is released, and the first locking pin is embedded into the first locking hole under the restoring force of the first spring to lock the box body fixed tube and the box body moving tube. At the same time, the first driving spring makes the first driving rod move inwards to reset.

[0020] 5. The telescopic luggage of the present invention, by pressing the second driving key, two second driving rods can be pushed to move outwards to press down the second connecting rod. The downward pressing of the second connecting rod drives the second inclined convex part to drive the second inclined groove to move inwards, so that the second locking pin retracts into the second seat body, enabling the push-pull moving tube to move along the push-pull fixed tube for adjusting the height of the handle. After the height adjustment is completed, the second driving key is released, and the second locking pin is embedded into the second locking hole under the restoring force of the second spring to lock the push-pull fixed tube and the push-pull moving tube. At the same time, the second driving spring makes the second driving rod move inwards to reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 is the internal structural schematic diagram of the present invention;

[0023] Figure 3 is the longitudinal sectional structural schematic diagram of the upper box body and the lower box body of the present invention;

[0024] Figure 4 is Figure 3 the partial enlarged view of part A in

[0025] Figure 5 is the transverse sectional structural schematic diagram of the present invention;

[0026] Figure 6 is Figure 5 the partial enlarged view of part B in

[0027] Figure 7 is the front three-dimensional structural schematic diagram of the box body fixed tube, the box body moving tube and the telescopic rod of the present invention;

[0028] Figure 8 is the rear three-dimensional structural schematic diagram of the box body fixed tube, the box body moving tube and the telescopic rod of the present invention;

[0029] Figure 9Schematic diagram of the structure of the box fixing pipe, box moving pipe and telescopic rod of the present invention without installing the mounting seat and handle;

[0030] Figure 10 Schematic diagram of the connection structure of the first driving member and the second driving member of the present invention;

[0031] Figure 11 Longitudinal sectional structure diagram of the box fixing pipe, box moving pipe and telescopic rod of the present invention along the first thrust member;

[0032] Figure 12 is Figure 11 Partial enlarged view of part C in;

[0033] Figure 13 Longitudinal sectional structure diagram of the box fixing pipe, box moving pipe and telescopic rod of the present invention along the second thrust member;

[0034] Figure 14 is Figure 13 Partial enlarged view of part D in;

[0035] Figure 15 Schematic diagram of the structure of the first driving member and the second driving member of the present invention;

[0036] Figure 16 Schematic diagram of the structure of the first locking member of the present invention without installing the first seat body;

[0037] Figure 17 Schematic diagram of the structure of the second locking member of the present invention without installing the second seat body.

[0038] The reference numerals in the figure are shown as:

[0039] 1. Box fixing pipe; 10. First locking hole; 2. Box moving pipe; 3. Telescopic rod; 30. Push-pull fixing pipe; 300. Second locking hole; 31. Push-pull moving pipe; 32. Second locking member; 320. Second seat body; 321. Second locking pin; 3210. Second inclined groove; 322. Second spring; 323. Second thrust member; 3230. Second inclined convex part; 324. Second connecting rod; 4. First locking member; 40. First seat body; 41. First locking pin; 410. First inclined groove; 42. First spring; 43. First thrust member; 430. First inclined convex part; 44. First connecting rod; 5. Mounting seat; 50. First driving member; 500. First driving key; 501. First driving rod; 502. First driving spring; 6. Handle; 60. Second driving member; 600. Second driving key; 601. Second driving rod; 602. Second driving spring; 7. Upper box body; 70. Upper cavity; 71. Upper cavity cover; 72. Upper locking member; 73. Upper limiting strip; 8. Lower box body; 80. Lower cavity; 81. Lower cavity cover; 82. Lower locking member; 83. Lower limiting strip; 84. Pulley. Detailed implementation manners

[0040] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] Please refer to Figures 1 to 17 , a telescopic luggage case, including a box body fixed tube 1, a box body moving tube 2, a telescopic rod 3, an upper box body 7 and a lower box body 8; the lower end of the upper box body 7 is sleeved outside the lower box body 8, and the capacity of the luggage case is adjusted by changing the relative positions of the upper box body 7 and the lower box body 8; the upper end of the box body moving tube 2 is fixedly connected to the upper box body 7, and a first locking member 4 is arranged at the lower end of the box body moving tube 2; the box body fixed tube 1 is fixedly connected to the lower box body 8, the lower end of the box body moving tube 2 is sleeved inside the box body fixed tube 1, and the box body moving tube 2 is locked on the box body fixed tube 1 through the first locking member 4; a pulley 84 for moving the luggage case is arranged at the bottom of the lower box body 8; the telescopic rod 3 is arranged at the upper end of the box body moving tube 2, and the luggage case is pushed and pulled through the telescopic rod 3.

[0042] As Figure 1 , Figure 5 and Figure 6 shown, the upper box body 7 includes an upper accommodation cavity 70 and an upper accommodation cover 71 which are oppositely arranged; an upper locking member 72 is arranged between the upper accommodation cavity 70 and the upper accommodation cover 71, and the upper accommodation cavity 70 and the upper accommodation cover 71 are detachably connected together through the upper locking member 72; the lower box body 8 includes a lower accommodation cavity 80 and a lower accommodation cover 81 which are oppositely arranged; a lower locking member 82 is arranged between the lower accommodation cavity 80 and the lower accommodation cover 81, and the lower accommodation cavity 80 and the lower accommodation cover 81 are detachably connected together through the lower locking member 82; both the upper locking member 72 and the lower locking member 82 are zippers; a lock head is fixedly arranged on the outer wall of the lower end of the upper box body 7, and the zipper heads of the upper locking member 72 and the lower locking member 82 are locked on the lock head.

[0043] As Figures 1 to 4 shown, an upper limit strip 73 is fixedly arranged at the lower end of the upper box body 7, and the upper limit strip 73 extends upward to the upper end inside the upper box body 7; a lower limit strip 83 is fixedly arranged at the upper end of the lower box body 8, and the lower limit strip 83 extends downward to the lower end outside the lower box body 8; the upper limit strip 73 is embedded into the gap between the lower limit strip 83 and the lower box body 8 from bottom to top, and the lower limit strip 83 is embedded into the gap between the upper limit strip 73 and the upper box body 7 from top to bottom, and the maximum stretching length of the upper box body 7 and the lower box body 8 is limited through the upper limit strip 73 and the lower limit strip 83.

[0044] As Figure 7 , Figure 9 , Figure 10 , Figure 11 , Figure 12 andFigure 16 As shown in the figure, the first locking member 4 includes a first base body 40, a plurality of first locking pins 41, a first spring 42, and a first thrust member 43; the first base body 40 is fixedly arranged at the lower end of the box body moving pipe 2; the box body fixing pipe 1 is provided with a plurality of first locking holes 10 at intervals from top to bottom; the first locking pin 41 and the first spring 42 are arranged in the first base body 40, one end of the first locking pin 41 is connected to the first spring 42, the other end of the first locking pin 41 is embedded in the first locking hole 10, and a protective cover for preventing sundries from entering the inside of the first locking hole 10 can be arranged outside the box body fixing pipe 1; the first thrust member 43 is arranged on the first base body 40, and the first locking pin 41 is driven to retract into the first base body 40 through the first thrust member 43.

[0045] As Figure 8 , Figure 9 , Figure 10 , Figure 13 , Figure 14 and Figure 17 As shown in the figure, the telescopic rod 3 includes a push-pull fixed pipe 30 and a push-pull moving pipe 31; the push-pull fixed pipe 30 is sleeved in the box body moving pipe 2 and its lower end is fixed to one side of the upper end of the first base body 40; a second locking member 32 is arranged at the lower end of the push-pull moving pipe 31; the lower end of the push-pull moving pipe 31 is sleeved in the push-pull fixed pipe 30, and the push-pull moving pipe 31 is locked on the push-pull fixed pipe 30 through the second locking member 32.

[0046] As Figure 8 , Figure 9 , Figure 10 , Figure 13 , Figure 14 and Figure 17 As shown in the figure, the second locking member 32 includes a second base body 320, a second locking pin 321, a second spring 322, and a second thrust member 323; the second base body 320 is fixedly arranged at the lower end of the box body moving pipe 2; the push-pull fixed pipe 30 is provided with a plurality of second locking holes 300 at intervals from top to bottom; the second locking pin 321 and the second spring 322 are arranged in the second base body 320, one end of the second locking pin 321 is connected to the second spring 322, the other end of the second locking pin 321 is embedded in the second locking hole 300; the second thrust member 323 is arranged on the second base body 320, and the second locking pin 321 is driven to retract into the second base body 320 through the second thrust member 323.

[0047] As Figure 10 , Figure 11 , Figure 12 and Figure 16As shown, the number of the first locking pins 41 is two, and the two first locking pins 41 are oppositely arranged on both sides of the first seat body 40; the end parts of the first springs 42 are fixedly connected to the inner ends of the two first locking pins 41 respectively; a first inclined groove 410 is arranged at the upper end of the first locking pin 41; the first thrust piece 43 is slidably arranged on the first seat body 40, and a first inclined convex part 430 is arranged at the lower end of the first thrust piece 43; a first connecting rod 44 is fixed to the upper end of the first thrust piece 43; the first connecting rod 44 is located outside the push-pull fixing pipe 30, and the upper end of the first connecting rod 44 extends out of the box body moving pipe 2. By pressing down the first connecting rod 44, the first inclined convex part 430 is driven to drive the first inclined groove 410 to move inwards, so that the first locking pin 41 retracts into the first seat body 40.

[0048] As Figure 10 , Figure 11 , Figure 12 and Figure 16 As shown, one end of the second spring 322 is fixedly connected to the inner end of the second locking pin 321, and the other end of the second spring 322 is fixedly connected to the second seat body 320; a second inclined groove 3210 is arranged at the upper end of the second locking pin 321; the second thrust piece 323 is slidably arranged on the second seat body 320, and a second inclined convex part 3230 is arranged at the lower end of the second thrust piece 323; a second connecting rod 324 is fixed to the upper end of the second thrust piece 323; the upper end of the second connecting rod 324 extends out of the push-pull moving pipe 31. By pressing down the second connecting rod 324, the second inclined convex part 3230 is driven to drive the second inclined groove 3210 to move inwards, so that the second locking pin 321 retracts into the second seat body 320.

[0049] As Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 15 As shown, two of the box body fixing pipes 1, the box body moving pipes 2 and the telescopic rods 3 are arranged oppositely left and right; an installation seat 5 is fixed between the upper ends of the two box body moving pipes 2, and a handle 6 is fixed between the upper ends of the two push-pull moving pipes 31; a first driving member 50 is arranged on the installation seat 5 to press down the two oppositely arranged first connecting rods 44 through the first driving member 50; a second driving member 60 is arranged on the handle 6 to press down the two oppositely arranged second connecting rods 324 through the second driving member 60.

[0050] As Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 15As shown, the first driving member 50 includes a first driving key 500 and two first driving rods 501 respectively arranged on the sides of the first driving key 500; both ends of the first driving rod 501 are inclined surfaces, and the first driving rod 501 is slidably arranged on the mounting seat 5; when the first driving key 500 is pressed down, it pushes the two first driving rods 501 to move outwards to press down the first connecting rod 44; a first driving spring 502 is arranged inside the first driving rod 501, and both ends of the first driving spring 502 are respectively connected to the first driving rod 501 and the mounting seat 5 to enable the first driving rod 501 to move inwards to reset; the second driving member 60 includes a second driving key 600 and two second driving rods 601 respectively arranged on the sides of the second driving key 600; both ends of the second driving rod 601 are inclined surfaces, and the second driving rod 601 is slidably arranged on the handle 6; when the second driving key 600 is pressed down, it pushes the two second driving rods 601 to move outwards to press down the second connecting rod 324; a second driving spring 602 is arranged inside the second driving rod 601, and both ends of the second driving spring 602 are respectively connected to the second driving rod 601 and the handle 6 to enable the second driving rod 601 to move inwards to reset.

[0051] As described above, the above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A telescopic suitcase, characterized in that: It includes a box fixed pipe (1), a box moving pipe (2), a telescopic rod (3), an upper box body (7) and a lower box body (8); the lower end of the upper box body (7) is sleeved outside the lower box body (8), and the capacity of the luggage case is adjusted by changing the relative position of the upper box body (7) and the lower box body (8); the upper end of the box moving pipe (2) is fixedly connected to the upper box body (7), and a first locking member (4) is arranged at the lower end of the box moving pipe (2); the box fixed pipe (1) is fixedly connected to the lower box body (8), the lower end of the box moving pipe (2) is sleeved inside the box fixed pipe (1), and the box moving pipe (2) is locked on the box fixed pipe (1) by the first locking member (4); a pulley (84) for moving the luggage case is arranged at the bottom of the lower box body (8); the telescopic rod (3) is arranged at the upper end of the box moving pipe (2), and the luggage case is pushed and pulled by the telescopic rod (3). The telescopic rod (3) includes a push-pull fixed pipe (30) and a push-pull moving pipe (31); the push-pull fixed pipe (30) is sleeved inside the box moving pipe (2); a second locking member (32) is arranged at the lower end of the push-pull moving pipe (31); the lower end of the push-pull moving pipe (31) is sleeved inside the push-pull fixed pipe (30), and the push-pull moving pipe (31) is locked on the push-pull fixed pipe (30) by the second locking member (32). Two box fixed pipes (1), two box moving pipes (2) and two telescopic rods (3) are arranged relatively on the left and right; an installation seat (5) is fixed between the upper ends of the two box moving pipes (2), and a handle (6) is fixed between the upper ends of the two push-pull moving pipes (31); a first driving member (50) is arranged on the installation seat (5), and the first locking member (4) is unlocked by pressing down two relatively arranged first connecting rods (44) by the first driving member (50), so that the box moving pipe (2) can slide along the box fixed pipe (1); a second driving member (60) is arranged on the handle (6), and the second locking member (32) is unlocked by pressing down two relatively arranged second connecting rods (324) by the second driving member (60), so that the push-pull moving pipe (31) can slide along the push-pull fixed pipe (30). The second driving member (60) is located above the first driving member (50).

2. The telescopic luggage according to claim 1, wherein: The upper box body (7) includes a relatively arranged upper cavity (70) and an upper cover (71); an upper locking member (72) is arranged between the upper cavity (70) and the upper cover (71), and the upper cavity (70) and the upper cover (71) are detachably connected together by the upper locking member (72); the lower box body (8) includes a relatively arranged lower cavity (80) and a lower cover (81); a lower locking member (82) is arranged between the lower cavity (80) and the lower cover (81), and the lower cavity (80) and the lower cover (81) are detachably connected together by the lower locking member (82).

3. The telescopic luggage according to claim 1, wherein: A upper limit strip (73) is fixed to the lower end of the upper box body (7), and the upper limit strip (73) extends upward to the upper end inside the upper box body (7); a lower limit strip (83) is fixed to the upper end of the lower box body (8), and the lower limit strip (83) extends downward to the lower end outside the lower box body (8); the upper limit strip (73) is inserted into the gap between the lower limit strip (83) and the lower box body (8) from bottom to top, and the lower limit strip (83) is inserted into the gap between the upper limit strip (73) and the upper box body (7) from top to bottom, and the maximum stretching length of the upper box body (7) and the lower box body (8) is limited by the upper limit strip (73) and the lower limit strip (83).

4. The telescopic suitcase according to claim 1, wherein: The first locking member (4) includes a first seat body (40), a plurality of first locking pins (41), a first spring (42) and a first thrust member (43); the first seat body (40) is fixedly arranged at the lower end of the box body moving pipe (2); a plurality of first locking holes (10) are arranged at intervals from top to bottom on the box body fixed pipe (1); the first locking pin (41) and the first spring (42) are arranged in the first seat body (40), one end of the first locking pin (41) is connected to the first spring (42), and the other end of the first locking pin (41) is inserted into the first locking hole (10); the first thrust member (43) is arranged on the first seat body (40), and the first locking pin (41) is driven to retract into the first seat body (40) through the first thrust member (43).

5. The telescopic luggage according to claim 4, wherein: The lower end of the push-pull fixed pipe (30) is fixed to one side of the upper end of the first seat body (40).

6. The telescopic trunk according to claim 5, characterized in that: The second locking member (32) includes a second seat body (320), a second locking pin (321), a second spring (322) and a second thrust member (323); the second seat body (320) is fixedly arranged at the lower end of the push-pull moving pipe (31); a plurality of second locking holes (300) are arranged at intervals from top to bottom on the push-pull fixed pipe (30); the second locking pin (321) and the second spring (322) are arranged in the second seat body (320), one end of the second locking pin (321) is connected to the second spring (322), and the other end of the second locking pin (321) is inserted into the second locking hole (300); the second thrust member (323) is arranged on the second seat body (320), and the second locking pin (321) is driven to retract into the second seat body (320) through the second thrust member (323).

7. The telescopic luggage according to claim 6, wherein: The number of the first locking pins (41) is two, and the two first locking pins (41) are oppositely arranged on both sides of the first seat body (40); the end parts of the first springs (42) are respectively fixedly connected with the inner ends of the two first locking pins (41); a first inclined groove (410) is arranged at the upper end of the first locking pin (41); the first thrust piece (43) is slidably arranged on the first seat body (40), and a first inclined convex part (430) is arranged at the lower end of the first thrust piece (43); a first connecting rod (44) is fixedly arranged at the upper end of the first thrust piece (43); the first connecting rod (44) is located outside the push-pull fixing pipe (30), and the upper end of the first connecting rod (44) extends out of the box body moving pipe (2). By pressing down the first connecting rod (44), the first inclined convex part (430) is driven to drive the first inclined groove (410) to move inwards, so that the first locking pin (41) retracts into the first seat body (40).

8. The telescopic luggage according to claim 7, wherein: One end of the second spring (322) is fixedly connected with the inner end of the second locking pin (321), and the other end of the second spring (322) is fixedly connected with the second seat body (320); a second inclined groove (3210) is arranged at the upper end of the second locking pin (321); the second thrust piece (323) is slidably arranged on the second seat body (320), and a second inclined convex part (3230) is arranged at the lower end of the second thrust piece (323); a second connecting rod (324) is fixedly arranged at the upper end of the second thrust piece (323); the upper end of the second connecting rod (324) extends out of the push-pull moving pipe (31). By pressing down the second connecting rod (324), the second inclined convex part (3230) is driven to drive the second inclined groove (3210) to move inwards, so that the second locking pin (321) retracts into the second seat body (320).

9. The telescopic suitcase according to claim 8, wherein: The first driving part (50) includes a first driving key (500) and two first driving rods (501) respectively arranged on the sides of the first driving key (500); both ends of the first driving rod (501) are inclined surfaces, and the first driving rod (501) is slidably arranged on the mounting seat (5); when the first driving key (500) is pressed down, the two first driving rods (501) are pushed to move outwards to press down the first connecting rod (44); a first driving spring (502) is arranged in the first driving rod (501), and both ends of the first driving spring (502) are respectively connected with the first driving rod (501) and the mounting seat (5) to enable the first driving rod (501) to move inwards and reset; the second driving part (60) includes a second driving key (600) and two second driving rods (601) respectively arranged on the sides of the second driving key (600); both ends of the second driving rod (601) are inclined surfaces, and the second driving rod (601) is slidably arranged on the handle (6); when the second driving key (600) is pressed down, the two second driving rods (601) are pushed to move outwards to press down the second connecting rod (324); a second driving spring (602) is arranged in the second driving rod (601), and both ends of the second driving spring (602) are respectively connected with the second driving rod (601) and the handle (6) to enable the second driving rod (601) to move inwards and reset.

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