Control system and electric luggage case

Abstract

According to the control system, the control rod acts on the speed regulation structure on the side away from the brake structure for speed regulation and acts on the brake structure on the side away from the speed regulation structure for braking, then advancing and braking operation is completed, operation is easy, operation is fast, and wiring in the control rod is not needed; the wire harness is directly installed on the inner side of the box body and is not easy to wear, and the problem of wire harness wear is effectively solved. Meanwhile, the control rod is directly connected with the steering piece through the connecting rod piece, the steering piece is directly installed at the bottom corner position (the position with the maximum structural strength) of the box body structure, the control rod is used for controlling the steering piece to conduct direction control, meanwhile, the control rod is energized, and the actions of advancing and rear braking can be completed; and the control rod is released or restrained by the restraining piece through position adjustment of the switching piece, so that the device can be used in both riding and traction operation modes. Due to the fact that only one control rod is adopted, the problem that space is limited due to the fact that multiple control rods are adopted in the prior art can be effectively solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of suitcases, in particular to a single-rod control system capable of forward movement and rear braking, and an electric suitcase adopting the control system. BACKGROUND

[0002] The electric suitcase is an innovative travel tool that combines traditional suitcases with electric drive technology. It not only has the function of storing luggage, but also realizes short-distance walking, intelligent control, and other extended functions through the built-in motor, battery, and control system, redefining the convenience of modern travel.

[0003] Among them, the control rod is the main control component of the electric suitcase. The electric suitcase often has two states, one is the riding state, and the other is the running state of the traditional suitcase (pulling operation). However, existing technologies such as CN215851653U set brake handle and speed adjustment handle on the steering mechanism, which requires wiring inside the steering rod and passing the wire on the steering rod and the box. Through frequent extension and retraction of the steering rod and steering action, internal wiring wear is caused and is not easy to be found. At the same time, it needs to be controlled by both hands, the operation is complex, and the manufacturing and maintenance cost is high. At the same time, a double-rod structure is needed to complete the riding and pulling modes, which is complex to operate and seriously occupies the space in the box. SUMMARY

[0004] In order to solve the above technical problems, the inventors have summarized and obtained the technical solution of the present application through practice. The present application adopts the following technical solution:

[0005] A control system, comprising:

[0006] a control rod;

[0007] a speed adjustment structure and a brake structure distributed on both sides of the control rod, the control rod acting on the speed adjustment structure on the side away from the brake structure for speed adjustment, and acting on the brake structure on the side away from the speed adjustment structure for braking;

[0008] a switching piece arranged on one side of the control rod and adjustable relative to the position of the control rod, used for opening and closing the control switch and restricting the speed adjustment structure and the brake structure to adhere to the outer wall of the control rod;

[0009] a steering piece installed at the bottom of the control rod.

[0010] In the control system, the speed adjustment structure includes a restriction body one on the front side of the control rod and a Hall electromagnetic rocker;

[0011] the brake structure includes a restriction body two on the rear side of the control rod and a micro switch two;

[0012] One end of the constraint body one and the constraint body two is provided with a rotating node, the other end is free and connected by an elastic body close to the end position, and the elastic body and the rotating node are located on the two sides of the control lever respectively;

[0013] The micro switch two corresponds to the constraint body two, and the Hall electromagnetic rocker corresponds to the constraint body one;

[0014] The switching piece includes a locking strip, the locking strip is provided with an intermediate body and a closing body, the intermediate body is located between the constraint body one and the constraint body two, and the closing body is provided with two groups and located on the side opposite to the constraint body one and the constraint body two.

[0015] In the control system, the middle part of the constraint body one and the constraint body two is provided with a constraint part;

[0016] One end of the constraint body one and the constraint body two away from the rotating node is provided with a deviation to the side away from the operating path of the closing body.

[0017] In the control system, one end of the constraint body one and the constraint body two away from the rotating node is provided with a control body one and a control body two, and the control body one and the control body two correspond to the Hall electromagnetic rocker and the micro switch two respectively;

[0018] The locking strip is provided with an operating handle and an extension body, and the extension body is provided with a micro switch one on one side.

[0019] In the control system, the waist-shaped hole is slidably fitted with a sliding sleeve, the sliding sleeve is installed on the outside of the control lever and located between the constraint body one and the constraint body two.

[0020] In the control system, the top and bottom of the sliding sleeve are provided with an outer edge body, and the outer edge bodies are distributed on the upper and lower sides of the waist-shaped hole respectively, and the outer edge body of the top is used to cover the outer edge body of the bottom of the waist-shaped hole and is distributed above the constraint body.

[0021] In the control system, the waist-shaped hole is slidably fitted with an outer sleeve body, and the inner sleeve body is rotatably installed on the inner side of the outer sleeve body, and the inner sleeve body is axially slidably fitted on the outside of the control lever.

[0022] In the control system, the steering piece includes two running wheels, a connecting plate one installed on the shaft of the running wheel and a support plate independently arranged at the bottom of the control lever;

[0023] The bottom of the control lever is provided with a connecting plate two, one end of the connecting plate two away from the control lever is connected through a connecting plate three and a connecting plate one, the connecting plate one is located at both ends of the connecting plate three, the connecting plate two is located at the middle part of the connecting plate three, and the support plate is connected with the bottom of the control lever.

[0024] In the control system, a through hole is formed in the support plate, a T-shaped sleeve is inserted into the through hole, a gap of 0.1-0.5mm is reserved between the outer edge of the small head of the T-shaped sleeve and the inner wall of the through hole, and the length of the small head of the T-shaped sleeve is 0.1-1.0mm larger than the thickness of the support plate.

[0025] An electric trolley case comprises a case structure and a control system as described above mounted on the case structure.

[0026] Compared with the prior art, the control system has the following beneficial effects:

[0027] The control lever is used to act on the speed regulating structure on the side away from the brake structure to regulate the speed, and act on the brake structure on the side away from the speed regulating structure to brake, thereby completing the forward movement and braking operation, which is simple to operate and easy to learn, and the wiring is directly installed inside the case and is not easy to be worn out, effectively solving the problem of wiring wear. The control lever is directly connected to the steering member through the connecting rod, the steering member is directly installed at the bottom corner position of the case structure (the position with the strongest structure strength), the control lever is used to control the steering member to control the direction, and the control lever is energized, the forward movement and braking operation can be completed, the constraint member is released or constrained by the switching member position adjustment, thereby the control lever can be used in the riding and pulling operation modes. Since only one control lever is used, the problem of limited space caused by multiple control levers can be effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the control system of the present application.

[0029] Figure 2 It is a schematic diagram of the bottom structure of the control lever of the present application.

[0030] Figure 3 It is a position relationship diagram of the switching member and the constraint member of the present application.

[0031] Figure 4 It is a structure diagram of the constraint member of the present application.

[0032] Figure 5 It is a structure diagram of the switching member of the present application.

[0033] Figure 6 It is a structure diagram of the steering member of the present application.

[0034] Figure 7 It is a top view of the support plate of the present application.

[0035] Figure 8 It is a structure diagram of the T-shaped sleeve of the present application.

[0036] Figure 9The connection relationship diagram of the T-shaped sleeve and the supporting plate of the present application.

[0037] Figure 10 The structure diagram of the kit of the present application.

[0038] Figure 11 The position relationship diagram of the outer sleeve body, the inner sleeve body and the waist-shaped hole of the present application

[0039] Figure 12 The top view of the outer sleeve body and the inner sleeve body of the present application.

[0040] Figure 13 The distribution diagram of the assembling hole.

[0041] Figure 14 The structure diagram of the electric luggage of the present application.

[0042] Figure 15 、 16 The structure diagram of the electric luggage of the present application.

[0043] Figure 17 The top view of the mounting frame and the pedal body of the present application.

[0044] Figure 18 The vertical sectional view of the mounting frame and the pedal body of the present application.

[0045] Figure 19 The side view of the mounting frame and the pedal body of the present application.

[0046] Figure 20 The position relationship diagram of the pedal body and the screw rod of the present application.

[0047] In the figure: 10, the control lever; 20, the constraint; 21, the constraint body one; 22, the constraint body two; 23, the elastic body; 24, the constraint part; 25, the control body one; 26, the control body two; 30, the switching part; 31, the locking strip; 32, the intermediate body; 33, the closing body; 34, the operation handle; 35, the extension body; 40, the turning part; 41, the traveling wheel; 42, the connecting plate one; 43, the supporting plate; 44, the connecting plate two; 45, the connecting plate three; 46, the T-shaped sleeve; 50, the mounting plate; 51, the micro switch one; 52, the micro switch two; 53, the Hall electromagnetic rocker; 54, the waist-shaped hole; 55, the sliding sleeve; 551, the outer sleeve; 552, the inner sleeve; 60, the box structure; 61, the mounting frame; 62, the double-shaft motor; 63, the screw rod; 64, the pedal body; 65, the steel ball; 66, the spring; 67, the jackscrew; 68, the guide frame; 69, the limiting body. DETAILED DESCRIPTION

[0048] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0049] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0050] Embodiment 1

[0051] As shown in the accompanying drawings, a control system comprises: Figures 1-6

[0052] A control lever 10;

[0053] A speed regulating structure and a brake structure are distributed on both sides of the control lever 10, the control lever 10 acts on the speed regulating structure on the side away from the brake structure to regulate the speed, and acts on the brake structure on the side away from the speed regulating structure to brake;

[0054] A switching piece 50 is arranged on one side of the control lever 10 and is adjustable relative to the position of the control lever 10, and is used to open and close the control switch 40 and constrain the speed regulating structure and the brake structure to adhere to the outer wall of the control lever 10;

[0055] A steering piece 40 is installed at the bottom of the control lever 10.

[0056] By opening the speed regulating structure and the brake structure through the switching piece 50, the same operation of the control lever 10 is completed to move forward and backward to realize the action of forward driving and rear braking, thereby facilitating control and avoiding the problem of damage caused by the friction between the wiring in the control lever 10 and the steering driven wire harness and the box.

[0057] Embodiment 2

[0058] In the control system, as shown in the accompanying drawings, the speed regulating structure comprises a constraint body one 21 located on the front side of the control lever 10 and a Hall electromagnetic rocker 53; Figure 4

[0059] The brake structure comprises a constraint body two 22 located on the rear side of the control lever 10 and a micro switch two 52;

[0060] One end of the constraint body one 21 and the constraint body two 22 is provided with a rotating node, the other end is freely provided and connected through an elastic body 23 close to the end position, and the elastic body 23 and the rotating node are located on both sides of the control lever 10, respectively; ​​

[0061] The positions of micro switch 52 and control body 26 are corresponding; the positions of Hall electromagnetic rocker 53 and control body 26 are also corresponding.

[0062] like Figure 5 As shown, the switching component 30 includes a locking bar 31, on which an intermediate body 32 and a closing body 33 are provided. The intermediate body 32 is located between the first constraint body 21 and the second constraint body 22. The closing body 33 is provided in two sets and is located on the opposite side of the first constraint body 21 and the second constraint body 22, respectively.

[0063] When the intermediate body 32 moves away from the control lever 10, the closing body 33 opens the first constraint body 21 and the second constraint body 22, and the intermediate body 32 is inserted into the area between the constraint bodies. At this time, the control lever 10 can move back and forth. Conversely, when the intermediate body 32 moves towards the control lever 10, the closing body 33 locks the two constraint bodies from the outside.

[0064] In specific implementation, the housing structure 60 is provided with a mounting plate 50. The mounting plate 50 is used to install the constraint member 20, the switching member 30, and to hide the operating handle at the top of the control lever 10. The back of the mounting plate 50 is provided with a guide body and a limiting body. The guide body is used to guide the switching member 30 left and right, and the limiting body is used to constrain the final position of the switching member 30. The constraint member 20 is arranged front and back, and the switching member 30 is arranged left and right. By adjusting the position of the locking bar 31, the closing body 33 restricts the state of the first constraint body 21 and the second constraint body 22. When adjusted to the left, the restriction can be released, and when adjusted to the right, the constraint action can be completed.

[0065] The operating handle 34 drives the locking bar 31 to move away from the control lever 10. The extension body 35 opens the micro switch 51, thereby closing the control circuit of the electric wheel at the bottom of the box structure 60. The closing body 33 is released from the ends of the constraint body 21 and constraint body 22, and the riding mode is activated. The indicator light on the mounting plate 50 lights up.

[0066] By pushing the control lever 10 forward, the control lever 10 pushes the constraint body 21 forward, causing the control body 25 to act on the Hall electromagnetic rocker 53, controlling the electric wheel to rotate and move the box forward. At this time, the constraint body 22 will abut against the intermediate body 32 under the action of the elastic body 23. When the forward force of the control lever 10 is released, the constraint body 21 will automatically return to its original position under the action of the elastic body 23, and the electric wheel will automatically decelerate. The speed control circuit based on the Hall electromagnetic rocker and the brake control circuit based on the micro switch are both existing mature technologies.

[0067] When an emergency occurs, the body's own stress is used to naturally pull the operating lever 10 back to move the restraint body two 22 backward, and the control body two 26 acts on the micro switch two 52 to brake the electric wheel.

[0068] When it is necessary to operate the locking strip 31 to the side far away from the operating lever 10 by operating the handle 34, the restraint body one 21 and the restraint body two 22 will be locked by the closing body 33, at this time the operating lever 10 cannot be rotated, and at the same time the micro switch one 51 will be opened by the extension body 35, at this time it is in the push-pull mode.

[0069] Embodiment 3

[0070] In the control system, as shown in the figure, Figure 4 The middle part of the restraint body one 21 and the restraint body two 22 is provided with a restraint part 24; the operating lever 10 can be restrained by the restraint part 24, and after being restrained, the operating end of the operating lever 10 can be kept in a centered state.

[0071] The end of the restraint body one 21 and the restraint body two 22 away from the rotation node is provided with a deviation to the side away from the operating path of the closing body 33, which is set to facilitate the closing body 33 to release the restraint of the restraint body.

[0072] Embodiment 4

[0073] In the control system, as shown in the figure, Figure 5 The end of the restraint body one 21 and the restraint body two 22 away from the rotation node is provided with a control body one 25 and a control body two 26, and the control body one 25 and the control body two 26 are respectively position corresponding to the Hall electromagnetic rocker 53 and the micro switch two 52.

[0074] The locking strip 31 is provided with an operating handle 34 and an extension body 35, the operating handle 34 extends out from the inner side of the mounting plate for easy operation, and the locking strip 31 is provided with an operating handle 34 and an extension body 35, one side of the extension body 35 is provided with a micro switch one 24.

[0075] Embodiment 5

[0076] In the control system, in order to complete the steering and forward and backward offset operation of the operating lever 10, as shown in the figure, Figure 10 The waist-shaped hole 54 is independently arranged on the outer side of the operating lever 10 and located on the mounting plate 50, and the sliding sleeve 55 is slidably fitted in the waist-shaped hole 54, the sliding sleeve 55 is installed on the outer side of the operating lever 10 and located between the restraint body one 21 and the restraint body two 22, the top and bottom of the sliding sleeve 55 are provided with an outer edge body, the outer edge bodies are respectively distributed on the upper and lower sides of the waist-shaped hole 54, the outer edge body on the top is used to cover the outer edge body on the bottom of the waist-shaped hole 54, which is distributed above the restraint body. A gap is reserved between the restraint body and the outer edge body on the bottom to facilitate the slight deflection of the sliding sleeve 55 forward and backward.

[0077] Example 6

[0078] The difference between the control system described in embodiment 5 and the previous one is as follows: Figures 11 to 12 As shown, in order to complete the steering and forward / backward offset operations of the control lever 10, an outer sleeve 551 is slidably fitted inside the waist-shaped hole 54, and an inner sleeve 552 is rotatably mounted on the inner side of the outer sleeve 551. The inner sleeve 552 is axially slidably fitted on the outer side of the control lever 10. This also achieves the technical effect of embodiment 5 described above.

[0079] Example 7

[0080] In the control system, such as Figure 6 As shown, the steering component 40 includes two traveling wheels 41, a connecting plate 42 mounted on the shaft of the traveling wheels 41, and a support plate 43 independently set at the bottom of the control lever 10. The support plate 43 is directly installed at the bottom corner of the box body by a reinforcement, which is the position with the greatest structural strength of the box body. This setting can ensure stable operation, even if...

[0081] A connecting plate 2 44 is installed at the bottom of the control lever 10. The end of the connecting plate 2 44 away from the control lever 10 is connected to the connecting plate 1 42 via the connecting plate 3 45. The connecting plate 1 42 is located at both ends of the connecting plate 3 45, and the connecting plate 2 44 is located in the middle of the connecting plate 3 45. The support plate 43 is connected to the bottom of the control lever 10.

[0082] In practice, the control lever 10 drives the connecting plate 2 44, which in turn drives the connecting plate 3 45, which in turn drives the connecting plate 1 42, which in turn drives the travel wheel 41 to rotate a certain angle, thereby completing the set angle and thus controlling the steering of the enclosure. In push-pull mode, the two wheels are directly mounted on the reinforcement, which makes the enclosure run more stably.

[0083] Example 8

[0084] In the control system, such as Figures 6-10 As shown, the support plate 43 has a through hole, and a T-shaped sleeve 46 is inserted into the through hole. A gap of 0.1-0.5mm is reserved between the outer edge of the small end of the T-shaped sleeve 46 and the inner wall of the through hole. The length of the small end of the T-shaped sleeve 46 is 0.1-1.0mm greater than the thickness of the support plate 43. Through the gap between the T-shaped sleeve 46 and the inner wall of the through hole, the control lever 10 can be moved back and forth. The forward movement distance is about 4mm, and the backward movement distance is 2mm. During the forward and backward deflection of the control lever 10, the connecting plate assembly can independently absorb the deformation of this angle without fatigue.

[0085] An electric suitcase, such as Figures 15-20As shown, the box structure 60 and the control system (as described in the above embodiment) are mounted on the box structure 60, and an electric telescopic pedal is further arranged at the bottom of the box structure 60.

[0086] The electric telescopic pedal comprises a mounting frame 61 arranged inside the box structure 60, a double-shaft motor 62 mounted on the mounting frame 61, a screw rod 63 mounted at the output end of the double-shaft motor 62, and a pedal body 64 sleeved outside the screw rod 63. The pedal body 64 is provided with a lateral slot hole, and a steel ball 65, a spring 66 and a jack 67 are sequentially arranged in the lateral slot hole from inside to outside. The jack 67 is threadedly mounted in the lateral slot hole and used for pressing the steel ball 65. The steel ball 65 and the screw rod 63 form a transmission cooperation. Two symmetrical guide frames 68 are arranged on the mounting frame 61, and a limiting body 69 is mounted on the pedal body 64 and located between the guide frames 68 and the double-shaft motor 62.

[0087] When the operation handle 34 moves to the side away from the control lever 10, the extension body 35 turns on the microswitch 51 to turn on the circuit. After the circuit is turned on, the double-shaft motor 62 automatically extends the pedal body 64 outward until the limiting body 69 is attached to the guide frame 68. When reaching the final position, the steel ball 65 will press the spring 66 as the screw rod 63 continues to rotate, and then the steel ball 65 and the screw rod 63 will slip. The pedal is kept at the predetermined extension length position by controlling the rotation speed, position or current. This control method is a mature technology.

[0088] When the power supply in the box structure 60 is insufficient, the motor cannot work. The pedal body 64 can be pressed inward by the heel, and the steel ball 65 will be separated from the spiral groove on the screw rod 63. Thus, the pedal body 64 can be independently retracted relative to the screw rod 63, which solves the problem that the traditional electric telescopic pedal of the luggage box cannot be retracted.

[0089] The advantage of this structure is that when the lengths of the pedal bodies 64 on both sides are inconsistent, i.e., when the front pedal body 64 reaches the extension position first, the pedal body 64 at the front position will slip relative to the screw rod 63 until the rear pedal body 64 reaches the position, and the predetermined extension position can be ensured by using the existing mature means such as motor current control, rotation time control and position sensor.

[0090] When the operation handle 34 moves to the side close to the control lever 10, the extension body 35 turns off the microswitch 51, and the double-shaft motor 62 automatically retracts the pedal body 64.

[0091] The above description is only a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. The alternatives can be partial structure, device, method step alternatives, or complete technical solutions. According to the technical solutions and inventive concepts of the present application, equivalent alternatives or changes should be covered within the protection scope of the present application.

Claims

1. A control system, characterized in that, include: Joystick (10); The speed control structure and the braking structure are distributed on both sides of the control lever (10). When the control lever (10) moves away from the braking structure, the speed control structure is used to adjust the speed, and when it moves away from the speed control structure, the braking structure is used to brake. The switching component (50) is arranged on one side of the control lever (10) and its position relative to the control lever (10) is adjustable. It is used to open and close the control switch (40) and constrain the speed regulation structure and the brake structure. It is attached to the outer wall of the control lever (10). Steering component (40) is mounted on the bottom of the control lever (10).

2. The control system according to claim 1, characterized in that, The speed control structure includes a constraint body (21) located in front of the control lever (10) and a Hall electromagnetic rocker (53). The braking structure includes a second constraint body (22) located behind the control lever (10) and a second micro switch (52). One end of constraint body 1 (21) and constraint body 2 (22) is provided with a rotation node, and the other end is freely set and connected by an elastic body (23) near the end position. The elastic body (23) and the rotation node are located on both sides of the control lever (10); The positions of micro switch 2 (52) and constraint body 2 (22) correspond, and the positions of Hall electromagnetic rocker (53) and constraint body 1 (21) correspond; The switching component (30) includes a locking bar (31), on which an intermediate body (32) and a closing body (33) are provided. The intermediate body (32) is located between the first constraint body (21) and the second constraint body (22). The closing body (33) is provided in two sets and is located on the opposite side of the first constraint body (21) and the second constraint body (22).

3. The control system according to claim 2, characterized in that, Both constraint body one (21) and constraint body two (22) are provided with constraint parts (24) in the middle. The ends of constraint body one (21) and constraint body two (22) away from the rotation node are provided with a deviation to the side away from the running path of the closed body (33).

4. The control system according to claim 2, characterized in that, The first constraint body (21) and the second constraint body (22) are provided with a control body (25) and a control body (26) at the ends away from the rotation node. The control body (25) and the control body (26) correspond to the positions of the Hall electromagnetic rocker (53) and the micro switch (52), respectively. The locking bar (31) is provided with an operating handle (34) and an extension body (35), and a micro switch (24) is provided on one side of the extension body (35).

5. The control system according to claim 4, characterized in that, A sliding sleeve (55) is slidably fitted inside the waist-shaped hole (54). The sliding sleeve (55) is installed on the outside of the control lever (10) and located between constraint body one (21) and constraint body two (22).

6. The control system according to claim 5, characterized in that, The top and bottom of the sliding sleeve (55) are provided with outer edges, which are distributed on the upper and lower sides of the waist-shaped hole (54). The outer edge at the top is used to cover the outer edge at the bottom of the waist-shaped hole (54), which is distributed above the constraint body.

7. The control system according to claim 4, characterized in that, The waist-shaped hole (54) is fitted with an outer sleeve (55) that slides back and forth. The inner sleeve (55) is rotatably installed on the inner side of the outer sleeve (55) and slides axially on the outer side of the control lever (10).

8. The control system according to claim 1, characterized in that, The steering component (40) includes two travel wheels (41), a connecting plate (42) mounted on the axle of the travel wheels (41), and a support plate (43) independently set at the bottom of the control lever (10). A connecting plate 2 (44) is installed at the bottom of the control lever (10). The end of the connecting plate 2 (44) away from the control lever (10) is connected to the connecting plate 1 (42) through the connecting plate 3 (45). The connecting plate 1 (42) is located at both ends of the connecting plate 3 (45), and the connecting plate 2 (44) is located in the middle of the connecting plate 3 (45). The support plate (43) is connected to the bottom of the control lever (10).

9. A control system according to claim 8, characterized in that, The support plate (43) has a through hole, and a T-shaped sleeve (46) is inserted into the through hole. A gap of 0.1-0.5mm is reserved between the outer edge of the small end of the T-shaped sleeve (46) and the inner wall of the through hole. The length of the small end of the T-shaped sleeve (46) is 0.1-1.0mm longer than the thickness of the support plate (43).

10. An electric suitcase, characterized in that, It includes a housing structure and a control system mounted on the housing structure as described in any one of claims 1 to 8.

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