Suitcase

Abstract

The utility model provides a suitcase and relates to the technical field of suitcases and suitcases. The traveling case comprises a case body, case wheels installed on the case body, locking wheels synchronously rotating with the case wheels and a locking rod installed on the case body, the locking rod is movably arranged in the radial direction of the locking wheels, a plurality of locking grooves are formed in the locking wheels, the locking grooves are distributed in the circumferential direction of the locking wheels, and the locking rods are arranged in the locking grooves. The lock rod moves towards the locking wheel in the radial direction of the locking wheel and penetrates through the bottom of the box body so as to be connected with any locking groove in an inserted mode. The skid resistance of the suitcase is improved. The locking grooves distributed in the circumferential direction of the locking wheel can provide inserting positions for the locking rods, so that the locking rods can stably and reliably limit rotation of the locking wheel, and then the traveling case can be prevented from moving along with inertia.

Description

Technical Field

[0001] This utility model relates to the field of luggage technology, and more specifically, to a suitcase. Background Technology

[0002] Suitcases can serve as seats on trains, subways, and buses when there are no seats available. However, when traditional suitcases are used as seats, they move with the inertia of the train, subway, or bus as it starts and stops, which poses a safety hazard. Utility Model Content

[0003] The problem this invention solves is: how to prevent suitcases from moving due to inertia.

[0004] To address the aforementioned problems, this utility model provides a suitcase, comprising a suitcase body, wheels mounted on the suitcase body, a locking wheel that rotates synchronously with the wheels, and a locking rod mounted on the suitcase body. The locking rod is radially movable along the locking wheel, and the locking wheel has multiple locking grooves distributed circumferentially along the locking wheel. The locking rod moves radially toward the locking wheel and passes through the bottom of the suitcase body to engage with any of the locking grooves.

[0005] Optionally, the radial dimension of the end of the locking rod toward the locking wheel is set to gradually decrease in the direction toward the locking wheel.

[0006] Optionally, the suitcase further includes a connecting rod, a driving rod, a first spring, and a cam. The bottom wall of the suitcase body has a receiving groove. One end of the locking rod passes through the bottom of the receiving groove and is slidably connected to the receiving groove along the radial direction of the locking wheel. The other end of the locking rod is connected to the connecting rod. The connecting rod is horizontally positioned within the receiving groove. The end of the connecting rod away from the locking rod is vertically connected to the driving rod. The driving rod is vertically positioned above the connecting rod. The end of the driving rod away from the connecting rod slides in contact with the cam. The cam is rotatably mounted on the... On the side wall of the housing, the first spring is fitted onto the locking rod and connected between the connecting rod and the bottom of the receiving groove. The first spring is used to prevent the locking rod from moving toward the locking wheel. The cam has a locking position and an unlocking position in the direction of rotation. When the cam rotates to the locking position and contacts the driving rod, the driving rod and the connecting rod move toward the bottom wall to overcome the elastic force of the first spring and drive the locking rod to insert into the locking groove. When the cam rotates to the unlocking position and contacts the driving rod, the elastic force of the first spring drives the locking rod to separate from the locking groove.

[0007] Optionally, the suitcase further includes a second spring. A guide groove is provided on the side wall of the suitcase. The guide groove extends vertically and communicates with the receiving groove. The drive rod is slidably connected to the guide groove. The second spring is fitted on the drive rod and connected between the connecting rod and the guide groove. The elastic force of the second spring is less than that of the first spring, and the elastic force of the second spring drives the connecting rod to move toward the locking wheel.

[0008] Optionally, the cam is provided with a knob protruding from the side wall.

[0009] Optionally, the suitcase further includes a pulley, which is rotatably connected to the end of the drive rod away from the connecting rod and rotates about its own axis, and the pulley makes rolling contact with the cam.

[0010] Optionally, the cam is provided with a groove that extends along the tangent of the cam, and the pulley is slidably connected to the groove.

[0011] Optionally, the box is provided with hooks for hanging on external objects to restrict the movement of the box.

[0012] Optionally, the suitcase also includes a support foot, one end of which is rotatably connected to the suitcase body, and the other end is used for tilting and supporting the ground.

[0013] Optionally, the suitcase further includes a wheel frame for mounting the suitcase wheels, the wheel frame being rotatably mounted on the bottom of the suitcase body, the locking wheel being located on the rotation axis of the wheel frame, and the wheel frame having a through hole through which the locking rod passes.

[0014] Compared with related technologies, the suitcase of this utility model, by setting the locking wheel and the suitcase wheel to rotate synchronously, can indirectly limit the rotation of the suitcase wheel by limiting the rotation of the locking wheel. This is achieved by setting multiple locking grooves on the locking wheel that are distributed circumferentially along the locking wheel, and the locking rod moving radially towards the locking wheel and penetrating the bottom of the suitcase to insert into any of the locking grooves. The rotation of the suitcase wheel is limited by the insertion of the locking rod into the locking groove. During the process of limiting the rotation of the locking wheel, the multiple locking grooves distributed circumferentially along the locking wheel can provide multiple insertion positions for the locking rod, so that the locking rod can stably and reliably limit the rotation of the locking wheel at any time, thereby preventing the suitcase from moving due to inertia. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the locking wheel in an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the suitcase in an embodiment of the present utility model. Figure 1 ;

[0017] Figure 3 This is a schematic diagram of the structure of the suitcase in an embodiment of the present utility model. Figure 2 ;

[0018] Figure 4 This is a schematic diagram of the structure of the suitcase in an embodiment of the present utility model. Figure 3 .

[0019] Explanation of reference numerals in the attached figures:

[0020] 1-Box body; 2-Box wheel; 3-Locking wheel; 31-Locking groove; 4-Locking rod; 5-Connecting rod; 6-Drive rod; 7-Cam; 8-Pulley; 9-First spring; 10-Second spring; 11-Knob; 12-Wheel frame; 121-Turntable; 122-Foot. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] In the attached diagram, the X-axis represents the horizontal position, with the positive direction of the X-axis (where the arrow points) indicating the right side and the negative direction (opposite to the positive direction) indicating the left side. Similarly, the Z-axis represents the vertical position, with the positive direction of the Z-axis (where the arrow points) indicating the top and the negative direction (opposite to the positive direction) indicating the bottom. It should be noted that the aforementioned representations of the X and Z axes are for ease of description and simplification only, and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0023] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in sequences other than those illustrated or described herein.

[0024] Combination Figures 1 to 3As shown, this utility model embodiment provides a suitcase, including a suitcase body 1, a suitcase wheel 2 mounted on the suitcase body 1, a locking wheel 3 that rotates synchronously with the suitcase wheel 2, and a locking rod 4 that is movably mounted on the suitcase body 1. The locking rod 4 is movably mounted along the radial direction of the locking wheel 3. The locking wheel 3 is provided with a plurality of locking grooves 31, which are distributed circumferentially along the locking wheel 3. The locking rod 4 is used to move radially toward the locking wheel 3 and penetrate through the bottom of the suitcase body 1 to engage with any of the locking grooves 31.

[0025] Specifically, the bottom of the suitcase body 1 is equipped with wheels 2, which facilitate the movement of the suitcase body 1 on the ground. A locking wheel 3 is coaxial with the wheels 2, and both wheels are rotatably mounted on the bottom of the suitcase body 1 via the same pivot. For example, the locking wheel 3 and wheels 2 are connected to the same pivot via keys. Simultaneously, a locking rod 4 is mounted on the suitcase body 1. The locking rod 4 is movably mounted on the suitcase body 1, and its direction of movement is consistent with the radial direction of the locking wheel 3. In this embodiment, the locking rod 4 is located above the locking wheel 3, and its movement is radially along the locking wheel 3 in the vertical direction. On the circumferential sidewall of the locking wheel 3, multiple locking grooves 31 are arranged in a circumferential array. When the housing 1 needs to remain stationary, the locking rod 4 moves from top to bottom toward the locking wheel 3, and the lower end of the locking rod 4 can pass through the bottom of the housing 1 to engage with any locking groove 31, restricting the rotation of the locking wheel 3, and thus restricting the rotation of the housing wheel 2, thereby ensuring that the housing 1 remains stationary. When the housing 1 needs to move, the locking rod 4 moves from bottom to top away from the locking wheel 3, and the lower end of the locking rod 4 separates from the engaged locking groove 31. The locking wheel 3 can then rotate synchronously with the housing wheel 2 again to facilitate the movement of the housing 1. It is understood that the diameter of the locking wheel 3 is smaller than the diameter of the housing wheel 2 to avoid the locking wheel 3 having an excessively large diameter that would affect the use of the housing wheel 2.

[0026] Therefore, in this embodiment, by setting the locking wheel 3 to rotate synchronously with the box wheel 2, the rotation of the box wheel 2 can be indirectly restricted by limiting the rotation of the locking wheel 3. Thus, the locking wheel 3 is provided with multiple locking grooves 31 distributed circumferentially on the locking wheel 3, and the locking rod 4 moves radially toward the locking wheel 3 and passes through the bottom of the box body 1 to be inserted into any locking groove 31. The rotation of the box wheel 2 is restricted by the insertion of the locking rod 4 into the locking groove 31. During the process of restricting the rotation of the locking wheel 3, the multiple locking grooves 31 distributed circumferentially on the locking wheel 3 can provide multiple insertion positions for the locking rod 4, so that the locking rod 4 can stably and reliably restrict the rotation of the locking wheel 3 at any time, thereby preventing the suitcase from moving due to inertia.

[0027] Optionally, combined Figure 1 As shown, the radial dimension of the end of the locking rod 4 toward the locking wheel 3 is set to gradually decrease in the direction toward the locking wheel 3.

[0028] Specifically, the end of the locking rod 4 facing the locking wheel 3 refers to the lower end of the locking rod 4. That is, the radial dimension of the lower end of the locking rod 4 is gradually reduced in the direction towards the locking wheel 3, and the lower end of the locking rod 4 is tapered.

[0029] Thus, by gradually decreasing the radial dimension of the end of the locking rod 4 toward the locking wheel 3 in the direction toward the locking wheel 3, the lower end of the locking rod 4 is tapered. During the insertion process of the locking rod 4 and the locking groove 31, the lower end of the locking rod 4 can easily move into the locking groove 31, thereby facilitating the insertion of the locking rod 4 and the locking groove 31.

[0030] Optionally, combined Figures 1 to 3 As shown, the suitcase also includes a connecting rod 5, a drive rod 6, a first spring 9, and a cam 7. The bottom wall of the suitcase body 1 has a receiving groove. One end of the locking rod 4 passes through the bottom of the receiving groove and is slidably connected to the receiving groove along the radial direction of the locking wheel. The other end of the locking rod 4 is connected to the connecting rod 5. The connecting rod 5 is horizontally positioned within the receiving groove. The end of the connecting rod 5 away from the locking rod 4 is vertically connected to the drive rod 6. The drive rod 6 is vertically positioned above the connecting rod 5. The end of the drive rod 6 away from the connecting rod 5 is in sliding contact with the cam 7. The cam 7 is rotatably mounted on the suitcase body 1. The first spring 9 is fitted onto the locking rod 4 and connected between the connecting rod 5 and the bottom of the receiving groove. The first spring 9 is used to prevent the locking rod 4 from moving toward the locking wheel 3. The cam 7 is provided with a locking position and an unlocking position in the direction of rotation. When the cam 7 rotates to the locking position and contacts the drive rod 6, the drive rod 6 and the connecting rod 5 move toward the bottom wall to overcome the elastic force of the first spring 9 and drive the locking rod 4 to insert into the locking groove. When the cam 7 rotates to the unlocking position and contacts the drive rod 6, the elastic force of the first spring 9 drives the locking rod 4 to separate from the locking groove.

[0031] Specifically, in the vertical direction of the housing 1, the cam 7 is located above the locking rod 4, and the connecting rod 5 and the drive rod 6 are located between the cam 7 and the locking rod 4. The cam 7 is rotatably mounted inside the side wall of the housing 1 via a rotating shaft (the side wall here can be understood as a side wall of the housing 1 in the circumferential direction). The outer peripheral wall position with a smaller wheel diameter on the cam 7 is the unlocked position, and the outer peripheral wall position with a larger wheel diameter on the cam 7 is the locked position. The drive rod 6 is vertically set and slides vertically inside the side wall of the housing 1. The connecting rod 5 is horizontally set, and its two ends are respectively connected to the lower end of the drive rod 6 and the upper end of the locking rod 4. The locking rod 4, the connecting rod 5, and the drive rod 6 can form a structure similar to an inverted "Z". A receiving groove is provided on the bottom of the housing 1, and a through hole is provided on the bottom of the receiving groove, which allows the lower end of the locking rod 4 to pass through. The first spring 9 is sleeved on the locking rod 4, and its two ends are respectively connected to the connecting rod 5 and the bottom of the receiving groove. The first spring 9 has a tendency to prevent the locking rod 4 from moving towards the locking wheel 3. Figure 2As shown, initially, the drive rod 6 abuts against the unlocked position on the cam 7. When it is necessary to restrict the rotation of the locking wheel 3, as... Figure 3 As shown, cam 7 rotates counterclockwise. As cam 7 rotates, the distance between drive rod 6 and the central axis of cam 7 gradually increases. Drive rod 6 gradually moves downward, causing connecting rod 5 to move downward and overcome the elastic force of the first spring 9, so that the lower end of locking rod 4 passes through the bottom of the receiving groove. When the locking position on cam 7, i.e., when the distance between drive rod 6 and the axis of cam 7 is at its maximum, locking rod 4 is inserted into locking groove 31 to restrict the rotation of locking wheel 3, thereby restricting the rotation of box wheel 2. When it is necessary to unlock box wheel 2, cam 7 rotates clockwise, and the first spring 9 gradually pushes up connecting rod 5 to cause locking rod 4 to separate from locking groove 31. When the unlocking position on cam 7 is again located at drive rod 6, the unlocking of box wheel 2 is completed.

[0032] Thus, during the process of restricting the gearbox wheel 2, the locking rod 4 can be easily and quickly engaged with the locking groove 31 on the locking wheel 3 simply by rotating the cam 7. During the process of releasing the gearbox wheel 2, the first spring 9 can also separate the locking rod 4 from the locking groove 31 to ensure that the locking rod 4 can be fully separated from the locking groove 31, thereby ensuring the normal use of the gearbox wheel 2 and improving the reliability of the locking rod 4.

[0033] Based on the above embodiments, combined with Figure 4 As shown, since there are often multiple gearbox wheels 2, let's take limiting the rotation of two gearbox wheels 2 as an example. To ensure that the rotation of the two gearbox wheels 2 can be limited simultaneously, each gearbox wheel 2 is provided with a locking rod 4 and a locking wheel 3. The connecting rod 5 is extended so that the two ends of the connecting rod 5 are respectively connected to two locking rods 4. Each locking rod 4 is fitted with a first spring 9. In this way, when the cam 7 causes the drive rod 6 to move downward, the connecting rod 5 can move downward, and the two locking rods 4 can be inserted into the locking grooves 31 on the corresponding locking wheels 3, thereby limiting the rotation of the two locking wheels 3, and thus limiting the rotation of the two gearbox wheels 2.

[0034] Optionally, combined Figures 1 to 3 As shown, the suitcase also includes a second spring 10. A guide groove is provided on the side wall of the suitcase body 1. The guide groove extends vertically and communicates with the receiving groove. The drive rod 6 is slidably connected to the guide groove. The second spring 10 is fitted on the drive rod 6 and connected between the connecting rod 5 and the guide groove. The elastic force of the second spring 10 is less than that of the first spring 9, and the elastic force of the second spring 10 drives the connecting rod 5 to move toward the locking wheel.

[0035] Specifically, the drive rod 6 is slidably connected in the guide groove, which is connected to the receiving groove. The length of the drive rod 6 is greater than the length of the guide groove. At least part of the lower end of the drive rod 6 can extend out of the guide groove and be located in the receiving groove. The second spring 10 is sleeved on the part of the drive rod 6 that extends out of the guide groove, and the two ends of the second spring 10 are respectively connected to the connecting rod 5 and the groove opening of the guide groove. The second spring 10 applies a downward elastic force to the connecting rod 5, and the elastic force of the second spring 10 is less than the elastic force of the first spring 9. This allows the elastic force of the second spring 10 to help improve the smoothness of the rotation of the cam 7 during the process of restricting the rotation of the box wheel 2, thereby improving the user experience. At the same time, during the process of releasing the restriction on the rotation of the box wheel 2, the first spring 9 can still separate the locking rod 4 from the locking groove 31.

[0036] Thus, a guide groove extending vertically along the side wall of the housing 1 is provided and communicates with the receiving groove. The drive rod 6 is slidably connected to the guide groove. The second spring 10 is fitted on the drive rod 6 and connected between the connecting rod 5 and the guide groove. The elastic force of the second spring 10 is less than that of the first spring 9, and the elastic force of the second spring 10 drives the connecting rod 5 to move toward the locking wheel. The second spring 10 can help improve the smoothness of the cam 7 in overcoming the elastic force of the first spring 9 during rotation, so as to improve the locking efficiency.

[0037] Optionally, combined Figures 2 to 3 As shown, a knob 11 protruding from the side wall is provided on the cam 7.

[0038] Specifically, the knob 11 can be in the shape of a straight line or a cross shape. The knob 11 protrudes from the side wall of the mounting cam 7, that is, the knob 11 is located outside the housing 1.

[0039] Thus, the knob 11 protruding from the side wall on the cam 7 allows the user to manually rotate it, thereby improving the rotation efficiency of the cam 7.

[0040] Optionally, combined Figures 1 to 3 As shown, the suitcase also includes a pulley 8, which is rotatably connected to the end of the drive rod 6 away from the connecting rod 5 and rotates around its own axis. The pulley 8 is in rolling contact with the cam 7.

[0041] Specifically, the upper end of the drive rod 6 may be provided with a wheel groove, the pulley 8 is installed in the wheel groove through a rotating shaft, and at least part of the pulley 8 protrudes out of the wheel groove, and the pulley 8 is in rolling contact with the cam 7.

[0042] Thus, by rotating the pulley 8 and the drive rod 6, and rotating around its own axis, the pulley 8 and the cam 7 are in rolling contact. During the rotation of the cam 7, the pulley 8 can rotate synchronously. The pulley 8 can reduce the friction between the drive rod 6 and the cam 7, thereby improving the smoothness of the rotation of the cam 7.

[0043] Optionally, the cam 7 is provided with a slide groove that extends along the tangent of the cam 7, and the pulley 8 is slidably connected to the slide groove.

[0044] Specifically, the slide groove is located on the circumferential sidewall of the cam 7, extending along the tangent of the cam 7 between the locked and unlocked positions, and the pulley 8 slides within the slide groove. Thus, by extending the slide groove along the tangent of the cam 7, the pulley 8 is slidably connected to the slide groove, which guides the pulley 8, ensuring stable rolling contact between the cam 7 and the pulley 8, and preventing separation between the cam 7 and the pulley 8.

[0045] Optionally, the box 1 is provided with hooks for hanging on external objects to restrict the movement of the box 1.

[0046] Specifically, the hook can be a "C" shaped structure. After restricting the rotation of the box wheel 2, it can also be hung on an external object to further improve the stability of the box body 1.

[0047] Thus, by providing hooks on the box body 1, which are used to hang on external objects to restrict the movement of the box body 1, the hooks can assist the locking rod 4 in engaging with the locking groove 31 to further improve the restriction on the movement of the box body 1.

[0048] Optionally, the suitcase also includes support feet, one end of which is rotatably connected to the suitcase body 1, and the other end is used for tilting and supporting the ground.

[0049] Specifically, the support foot can be a telescopic rod, which includes a sleeve and a sliding rod connected by a locking structure. The sliding rod is slidably connected to the sleeve, and the sliding length of the sliding rod is limited by the locking structure. During installation, the sleeve is rotatably mounted on the side wall of the box 1. During use, the fixed end of the telescopic rod is rotated to tilt the telescopic rod relative to the box 1, and then the movable end of the telescopic rod is extended to abut against the ground and locked by the locking structure. The movement of the box 1 is restricted by the abutment of the telescopic rod against the ground.

[0050] Optionally, combined Figures 2 to 3 As shown, the suitcase also includes a wheel frame 12 for mounting the suitcase wheels 2. The wheel frame 12 is rotatably mounted on the bottom of the suitcase body 1. The locking wheel 3 is located on the rotation axis of the wheel frame 12. The wheel frame 12 is provided with a through hole for the locking rod 4 to pass through.

[0051] Specifically, the wheel frame 12 includes a turntable 121 and two support legs 122. The turntable 121 is rotatably mounted on the bottom of the housing 1. A through hole is provided at the rotation axis of the turntable 121, which communicates with the receiving groove. The locking wheel 3 and the housing wheel 2 are rotatably mounted between the two support legs 122, and the locking wheel 3 is located on the axis of the through hole. The wheel frame 12 can realize the rotation of the housing wheel 2 in the horizontal direction, so as to facilitate the steering of the housing 1 when moving. When the rotation of the housing wheel 2 is restricted, the locking wheel 3 is always located on the axis of the through hole. After the wheel frame 12 rotates at any angle, the locking rod 4 can pass through the through hole and be inserted into the locking groove 31 on the locking wheel 3.

[0052] Thus, the wheel frame 12 is rotatably mounted on the bottom of the suitcase 1, and the locking wheel 3 is located on the rotation axis of the wheel frame 12. The wheel frame 12 is provided with a through hole for the locking rod 4 to pass through. After the wheel frame 12 rotates at any angle, the locking rod 4 can pass through the through hole and be inserted into the locking groove 31 on the locking wheel 3. This not only improves the flexibility of the suitcase but also expands the applicability of the locking wheel 3.

[0053] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A travel case characterized by, The utility model provides a box wheel locking device, including box (1), install the box wheel (2) of box (1), with the synchronous rotation setting of box wheel (2) lock wheel (3) and install the lock rod (4) of box (1), lock rod (4) along the radial movement setting of lock wheel (3), be provided with a plurality of lock slot (31) on lock wheel (3), a plurality of lock slot (31) along the circumferential distribution of lock wheel (3), lock rod (4) along the radial of lock wheel (3) towards lock wheel (3) moves and penetrates the bottom of box (1), to be inserted with any lock slot (31).

2. The travel case of claim 1, wherein, The radial dimension of the end of the lock rod (4) towards the lock wheel (3) gradually decreases in the direction towards the lock wheel (3).

3. The travel case of claim 1, wherein, Further comprising a connecting rod (5), a drive rod (6), a first spring (9) and a cam (7), the bottom wall of the box (1) is provided with a receiving groove, one end of the lock rod (4) penetrates the groove bottom of the receiving groove and is slidingly connected with the receiving groove in the radial direction of the lock wheel, the other end of the lock rod (4) is connected with the connecting rod (5), the connecting rod (5) is horizontally arranged and located in the receiving groove, the end of the connecting rod (5) away from the lock rod (4) is perpendicularly connected with the drive rod (6), the drive rod (6) is vertically arranged and located above the connecting rod (5), the end of the drive rod (6) away from the connecting rod (5) is slidingly contacted with the cam (7), the cam (7) is rotationally mounted on the side wall of the box (1), the first spring (9) is sleeved on the lock rod (4) and connected between the connecting rod (5) and the groove bottom of the receiving groove, and the first spring (9) is used to resist the movement of the lock rod (4) towards the lock wheel (3), the cam (7) is provided with a locking position and an unlocking position in the direction of rotation, when the cam (7) is rotated to the locking position and contacted with the drive rod (6), the drive rod (6) and the connecting rod (5) move towards the bottom wall to overcome the elastic force of the first spring (9) and drive the lock rod (4) to be inserted with the lock slot; when the cam (7) is rotated to the unlocking position and contacted with the drive rod (6), the elastic force of the first spring (9) drives the lock rod (4) to be separated from the lock slot.

4. The travel case of claim 3, wherein, Further comprising a second spring (10), the side wall of the box (1) is provided with a guide groove, the guide groove extends in the vertical direction and communicates with the receiving groove, the drive rod (6) is slidingly connected with the guide groove, the second spring (10) is sleeved on the drive rod (6) and connected between the connecting rod (5) and the guide groove, the elastic force of the second spring (10) is smaller than the elastic force of the first spring (9), and the elastic force of the second spring (10) drives the connecting rod (5) to move towards the lock wheel.

5. The travel case of claim 3, wherein, The cam (7) is provided with a knob (11) protruding from the side wall.

6. The travel case of claim 3, wherein, Further comprising a pulley (8) which is rotatably connected with the end of the driving rod (6) away from the connecting rod (5) and rotates around its own axis, and the pulley (8) is in rolling contact with the cam (7).

7. The travel case of claim 6, wherein, The cam (7) is provided with a sliding groove which extends along the tangent of the cam (7), and the pulley (8) is slidingly connected with the sliding groove.

8. The travel case of claim 1, wherein, The box (1) is provided with a hook which is used for hanging on an external object to limit the movement of the box (1).

9. The travel case of claim 1, wherein, Further comprising a supporting leg which is rotatably connected with one end of the box (1) and is used for leaning against the ground.

10. The travel case of claim 1, wherein, Further comprising a wheel frame (12) on which the box wheel (2) is installed, the wheel frame (12) is rotatably installed on the bottom of the box (1), the locking wheel (3) is located on the rotation axis of the wheel frame (12), and the wheel frame (12) is provided with a through hole through which the locking rod (4) passes.

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