Portable strong sound emergency device
By adding auxiliary speakers to the sound-enhancing device and arranging them radially with the main speaker, the problem of limited sound playback caused by a single speaker is solved, achieving wider sound wave coverage and a stronger playback effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-03-27
AI Technical Summary
Existing high-power sound devices typically only have one speaker, resulting in limited sound playback quality and making it difficult to meet the needs of a wide range of applications.
An auxiliary speaker is added to the main speaker, and the main speaker and the auxiliary speaker are arranged radially to enhance the sound output.
The radially arranged speaker structure significantly improves sound coverage and playback quality, adapting to the needs of various application scenarios.
Smart Images

Figure CN224054426U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to strong sound device technical field especially relates to a portable strong sound emergency device. BACKGROUND
[0002] At present, most of the strong sound devices are used in military systems, such as sea patrol, sentry, prison, drug rehabilitation center, etc.; public security system, such as strong sound dispersion, control and propaganda of mass emergency, traffic system, etc.; and public safety system, emergency system, public broadcasting system, etc. The playing range is wide. Since the strong sound device is realized by a loudspeaker (such as a loudspeaker) to realize the on-site sound amplification command and dispersion rejection problem, the setting of the loudspeaker affects the realization of the strong sound function of the strong sound device, and the existing strong sound device generally only has one loudspeaker, so that the playing effect of the sound is limited. UTILITY MODEL CONTENT
[0003] In order to overcome at least one defect of the prior art, the utility model provides a portable strong sound emergency device, which is provided with a main loudspeaker and an auxiliary loudspeaker on the side of the main loudspeaker, and the main loudspeaker and the auxiliary loudspeaker are arranged in a radial manner, further enhancing the effect of loudspeaking.
[0004] The utility model adopts the technical scheme that
[0005] A portable strong sound emergency device comprises:
[0006] A main body structure;
[0007] A loudspeaker structure, which comprises a main loudspeaker and an auxiliary loudspeaker;
[0008] The front part of the main body structure is provided with at least one main loudspeaker, and the at least one side part of the main body structure is provided with at least one auxiliary loudspeaker in an inclined manner, and the main loudspeaker and the auxiliary loudspeaker are arranged in a radial manner.
[0009] In some embodiments, the auxiliary loudspeaker is arranged in an inclined manner towards the direction close to the main loudspeaker, and the center axis of the auxiliary loudspeaker and the center axis of the main loudspeaker have an included angle a, 0° < a < 90°.
[0010] In some embodiments, the left and right sides of the main body structure are each provided with at least one auxiliary loudspeaker, and the main loudspeaker and the auxiliary loudspeaker are arranged in a radial manner along the transverse direction or the inclined direction.
[0011] And / or, the upper and lower sides of the main body structure are each provided with at least one auxiliary loudspeaker, and the main loudspeaker and the auxiliary loudspeaker are arranged in a radial manner along the longitudinal direction or the inclined direction.
[0012] In some embodiments, the main body structure comprises a cabinet, a first auxiliary wing plate and a second auxiliary wing plate, the first auxiliary wing plate is arranged to be inclined forwardly;
[0013] The main body structure is provided with a main opening at the position of the sound outlet of the main loudspeaker, the main opening is arranged to face a third direction;
[0014] In some embodiments, the auxiliary opening comprises a first opening portion and a second opening portion which are connected to each other, the first opening portion is arranged to face a first direction, and the second opening portion is arranged to face a second direction;
[0015] The main body structure is provided with a main opening at the position of the sound outlet of the main loudspeaker, the main opening is arranged to face a third direction;
[0016] The first direction and the third direction are perpendicular to each other.
[0017] In some embodiments, the auxiliary opening is provided with an auxiliary protection structure, the auxiliary protection structure comprises a first bending portion and a second bending portion, the first bending portion and the second bending portion are connected to each other, the first bending portion is arranged to correspond to the first opening portion, and the second bending portion is arranged to correspond to the second opening portion;
[0018] The main opening is provided with a main protection structure;
[0019] The second bending portion is arranged between the first bending portion and the main protection structure.
[0020] In some embodiments, the auxiliary protection structure comprises an auxiliary mesh cover and an auxiliary mesh cover dustproof net, the auxiliary mesh cover is arranged outside the auxiliary mesh cover dustproof net;
[0021] The main protection structure comprises a main mesh cover and a main mesh cover dustproof net, the main mesh cover is arranged outside the main mesh cover dustproof net.
[0022] In some embodiments, the edge of the first auxiliary wing plate and / or the second auxiliary wing plate which is connected to the auxiliary protection structure is provided with a first protection strip, the first protection strip protrudes towards the auxiliary protection structure;
[0023] The edge of the main mesh cover is provided with a second protection strip, the second protection strip protrudes towards the main mesh cover dustproof net.
[0024] In some embodiments, the portable loud sound emergency device further comprises a driving structure, a control structure, a battery structure and an operation structure;
[0025] The inside of the main body structure is hollow to form a mounting cavity, the loudspeaker structure is arranged at the front of the mounting cavity, the driving structure and the control structure are arranged at the middle of the mounting cavity, the battery structure is arranged at the lower part of the mounting cavity, and the operation structure is arranged at the rear of the mounting cavity and extends to the outside of the main body structure.
[0026] In some embodiments, the upper portion of the main body structure is provided with a handle;
[0027] And / or, the outer portion of the main body structure is provided with a foot pad.
[0028] In summary, the utility model has the following technical effects: the utility model is provided with the main loudspeaker, and the auxiliary loudspeaker is additionally arranged on the side portion of the main loudspeaker to assist in loudspeaking, and the main loudspeaker and the auxiliary loudspeaker are arranged radially, so that the loudspeaking effect is further enhanced. BRIEF DESCRIPTION OF DRAWINGS
[0029] Figure 1 It is an external structure schematic view of the first visual angle of the embodiment of the utility model;
[0030] Figure 2 It is an external structure schematic view of the second visual angle of the embodiment of the utility model;
[0031] Figure 3 It is an exploded view of the embodiment of the utility model;
[0032] Figure 4 It is a structure schematic view of the auxiliary protection structure and the auxiliary loudspeaker of the embodiment of the utility model.
[0033] Among them, the meaning of the sign is as follows:
[0034] 10, main body structure, 101, shell, 102, first auxiliary wing plate, 103, second auxiliary wing plate, 104, auxiliary opening, 1041, first mouth, 1042, second mouth, 105, main opening, 106, auxiliary mesh cover, 107, auxiliary mesh cover dust screen, 108, main mesh cover, 109, main mesh cover dust screen, 110, first protection strip, 111, second protection strip, 20, loudspeaker structure, 201, main loudspeaker, 202, auxiliary loudspeaker, 30, driving structure, 40, control structure, 401, control board, 402, power amplifier board, 50, battery structure, 501, battery, 502, battery cover, 503, waterproof silica gel plate, 60, operation structure, 601, button, 602, interface, 603, knob, 604, visual window, 70, handle, 80, foot pad. DETAILED DESCRIPTION
[0035] In order to better understand and implement, the technical scheme in the embodiment of the utility model will be clearly and completely described below by combining the drawings in the embodiment of the utility model.
[0036] In the description of the utility model, it needs to explain, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, just for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as the limitation of the utility model.
[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model.
[0038] Referring to Figures 1-4 The utility model discloses a portable strong sound emergency device, include: main body structure 10, loudspeaker structure 20, loudspeaker structure 20 includes main loudspeaker 201 and auxiliary loudspeaker 202, the front of main body structure 10 is provided with at least one main loudspeaker 201, and at least one auxiliary loudspeaker 202 is obliquely arranged on the side of main body structure 10, and main loudspeaker 201 and auxiliary loudspeaker 202 are arranged radially.
[0039] It needs to be explained that main loudspeaker 201 and auxiliary loudspeaker 202 can directly adopt existing loudspeaker structure, for example loudspeaker, that is to say, main loudspeaker 201 and auxiliary loudspeaker 202 are loudspeaker structure, and main loudspeaker 201 and auxiliary loudspeaker 202 are both loudspeaker with one end big and the other end small, and the oblique arrangement of auxiliary loudspeaker 202 and the radial arrangement of main loudspeaker 201 and auxiliary loudspeaker 202 mean that the small end of auxiliary loudspeaker 202 and the small end of main loudspeaker 201 are arranged close to each other, and the big end of auxiliary loudspeaker 202 and the big end of main loudspeaker 201 are arranged close to each other, compared with the parallel arrangement of two loudspeakers, that is to say, compared with the arrangement of two loudspeakers only through the big end close to each other, the loudspeaker effect of the oblique arrangement of auxiliary loudspeaker 202 and the radial arrangement of main loudspeaker 201 and auxiliary loudspeaker 202 in the portable strong sound emergency device is better, and the structure is more compact.
[0040] The utility model is provided with main loudspeaker 201 on the basis of the side of auxiliary loudspeaker 202 and is arranged radially with main loudspeaker 201 and auxiliary loudspeaker 202, which further enhances the effect of loudspeaker.
[0041] In the embodiment of the utility model, the auxiliary speaker 202 is arranged obliquely towards the direction of the main speaker 201, and the central axis of the auxiliary speaker 202 and the central axis of the main speaker 201 have an included angle a, 0 ° < a < 90 °.
[0042] Further, 30 ° < a < 60 °, at this time, the auxiliary speaker 202 arranged on the two sides of the main speaker 201 and the main speaker 201 gather to form a whole loudspeaker-shaped loudspeaker structure 20, which further enhances the loudspeaker effect of the portable loudspeaker emergency device.
[0043] In the embodiment of the utility model, the left and right sides of the main body structure 10 are each provided with at least one auxiliary speaker 202, and the main speaker 201 and the auxiliary speaker 202 are arranged radially along the transverse direction or the inclined direction; the upper and lower sides of the main body structure 10 are each provided with at least one auxiliary speaker 202, and the main speaker 201 and the auxiliary speaker 202 are arranged radially along the longitudinal direction or the inclined direction.
[0044] Referring to Figure 1 , the left and right sides of the main body structure 10 are each provided with one auxiliary speaker 202, and the main speaker 201 and the auxiliary speaker 202 are arranged radially along the transverse direction, which meets the requirement of loud sound playing effect in the transverse space during use; if the portable loudspeaker emergency device is used in the air, the upper and lower sides of the main body structure 10 are each provided with at least one auxiliary speaker 202, and the main speaker and the auxiliary speaker 202 are arranged radially along the longitudinal direction, which meets the requirement of loud sound playing effect in the longitudinal space during use; of course, for some special application scenarios, the main body structure 10 can be provided with auxiliary speakers 202 around any side of the main speaker 201 to further increase the loudspeaker effect.
[0045] In the embodiment of the utility model, the main body structure 10 comprises a shell 101, a first auxiliary wing plate 102 and a second auxiliary wing plate 103, and the first auxiliary wing plate 102 is arranged obliquely forward; the main body structure 10 is provided with an auxiliary opening 104 communicating with the outside at the sound outlet position of the auxiliary speaker 202, and the shell 101, the first auxiliary wing plate 102 and the second auxiliary wing plate 103 surround the auxiliary opening 104.
[0046] Further, the first auxiliary wing plate 102 is arranged along the arrangement direction of the auxiliary speaker 202, the shell 101, the first auxiliary wing plate 102 and the second auxiliary wing plate 103 not only enclose the auxiliary opening 104, but also enclose a channel for placing the auxiliary speaker 202, the channel being in communication with the auxiliary opening 104, so as to further reduce the size of the mounting cavity of the main body structure 10, so that the portable strong sound emergency device is smaller in size and more compact in structure.
[0047] In the embodiment of the utility model, the auxiliary opening 104 includes the first opening part 1041 and the second opening part 1042, the first opening part 1041 is arranged towards the first direction, and the second opening part 1042 is arranged towards the second direction; the main body structure 10 is provided with the main opening 105 in communication with the outside at the sound emitting port position of the main speaker 201, and the main opening 105 is arranged towards the third direction; the first direction and the third direction are perpendicular to each other.
[0048] Specifically, referring to Figure 1 If the X direction is the first direction and the Y direction is the third direction, then the second direction is towards the direction between the X direction and the Y direction; the second auxiliary wing plate 103 is trapezoidal, and the two second auxiliary wing plates 103 are arranged on the upper side and the lower side of the first auxiliary wing plate 102 respectively, so that the first auxiliary wing plate 102, the second auxiliary wing plate 103 and the shell 101 enclose the auxiliary opening 104 including the first opening part 1041 and the second opening part 1042.
[0049] The width of the first opening part 1041 is smaller than the width of the second opening part 1042, the width of the first opening part 1041 is L1, the width of the second opening part 1042 is L2, and L1=(0.1-0.5)L2.
[0050] Based on the above structure, in order to more concentratedly play the sound of the main speaker 201 and the auxiliary speaker 202, the sound emitting port of the auxiliary speaker 202 is aligned with the second opening part 1042 of the auxiliary opening 104, the sound emitting port of the main speaker 201 is aligned with the main opening 105, and the second opening part 1042 is arranged close to the main opening 105, so that the portable strong sound emergency device has sufficient sound playing effect towards the third direction; the first opening part 1041 is arranged on the side away from the main opening 105 of the second opening part 1042, the first opening part 1041 diffuses the sound emitted by the auxiliary speaker 202 towards the first direction, so that the portable strong sound emergency device also has sound playing effect of diffusion towards the first direction.
[0051] In the embodiment of the utility model, the auxiliary opening 104 is provided with an auxiliary protection structure, the auxiliary protection structure comprises a first bending part and a second bending part, the first bending part and the second bending part are connected with each other, the first bending part is provided corresponding to the first opening part 1041, and the second bending part is provided corresponding to the second opening part 1042; the main opening 105 is provided with a main protection structure; the second bending part is arranged between the first bending part and the main protection structure.
[0052] In the embodiment of the utility model, the auxiliary protection structure comprises an auxiliary mesh cover 106 and an auxiliary mesh cover dustproof net 107, the auxiliary mesh cover 106 is arranged outside the auxiliary mesh cover dustproof net 107; the main protection structure comprises a main mesh cover 108 and a main mesh cover dustproof net 109, and the main mesh cover 108 is arranged outside the main mesh cover dustproof net 109.
[0053] Specifically, the auxiliary mesh cover 106 and the auxiliary mesh cover dustproof net 107 are arranged in parallel with each other, the auxiliary mesh cover 106 comprises a first auxiliary mesh cover bending part and a second auxiliary mesh cover bending part, the auxiliary mesh cover dustproof net 107 comprises a first dustproof net bending part and a second dustproof net bending part, so that the first auxiliary mesh cover bending part and the first dustproof net bending part form the first bending part, and the second auxiliary mesh cover bending part and the second dustproof net bending part form the second bending part.
[0054] Specifically, the main mesh cover 108 and the main mesh cover dustproof net 109 are arranged in parallel with each other.
[0055] Specifically, a plurality of holes are formed in the auxiliary mesh cover 106 and the auxiliary mesh cover dustproof net 107, the sound emitted by the auxiliary loudspeaker 202 is propagated outward through the holes in the auxiliary mesh cover 106 and the holes in the auxiliary mesh cover dustproof net 107, the auxiliary mesh cover 106 is arranged outside the auxiliary mesh cover dustproof net 107, the diameter of the holes in the auxiliary mesh cover dustproof net 107 is smaller than the diameter of the holes in the auxiliary mesh cover 106, the holes in the auxiliary mesh cover dustproof net 107 and the holes in the auxiliary mesh cover 106 are arranged in one-to-one correspondence, and the holes in the auxiliary mesh cover dustproof net 107 and the holes in the auxiliary mesh cover 106 are connected in series, so that the holes form a horn-shaped hole with a small inner diameter and a large outer diameter, the sound is propagated, and the loud sound effect of the portable loud sound emergency device is enhanced.
[0056] Similarly, a plurality of holes are formed in the main mesh cover 108 and the main mesh cover dustproof net 109, the sound emitted by the main loudspeaker 201 is propagated outward through the holes in the main mesh cover 108 and the holes in the main mesh cover dustproof net 109, the main mesh cover 108 is arranged outside the main mesh cover dustproof net 109, the diameter of the holes in the main mesh cover dustproof net 109 is smaller than the diameter of the holes in the main mesh cover 108, the holes in the main mesh cover dustproof net 109 and the holes in the main mesh cover 108 are arranged in one-to-one correspondence, and the holes in the main mesh cover dustproof net 109 and the holes in the main mesh cover 108 are connected in series, so that the holes form a horn-shaped hole with a small inner diameter and a large outer diameter, the sound is propagated, and the loud sound effect of the portable loud sound emergency device is enhanced.
[0057] Further, the auxiliary protection structure and the main protection structure are both double-layer structures, which further protect the loudspeaker structure 20.
[0058] In the embodiment of the utility model, the edge of the first auxiliary wing plate 102 and / or the second auxiliary wing plate 103 connected with the auxiliary protection structure is provided with the first protection strip 110, and the first protection strip 110 protrudes towards the direction of the auxiliary protection structure; the edge of the main net cover 108 is provided with the second protection strip 111, and the second protection strip 111 protrudes towards the direction of the main net cover dustproof net 109.
[0059] Specifically, the first protection strip 110 and the second protection strip 111 are both silica gel strips or rubber strips, the first protection strip 110 can avoid rainwater, dust and the like from entering the auxiliary loudspeaker 202 through the connecting gap between the first auxiliary wing plate 102 and / or the second auxiliary wing plate 103 and the auxiliary protection structure, and the second protection strip 111 can avoid rainwater, dust and the like from entering the main loudspeaker 201 through the connecting gap between the main net cover 108 and the main net cover dustproof net 109.
[0060] In the embodiment of the utility model, the portable strong sound emergency device further includes a driving structure 30, a control structure 40, a battery structure 50 and an operation structure 60; the inside of the main body structure 10 is hollow to form an installation cavity, the loudspeaker structure 20 is arranged at the front of the installation cavity, the driving structure 30 and the control structure 40 are arranged at the middle of the installation cavity, the battery structure 50 is arranged at the lower part of the installation cavity, and the operation structure 60 is arranged at the rear of the installation cavity and extends to the outside of the main body structure 10.
[0061] Therefore, the loudspeaker structure 20, the driving structure 30, the control structure 40, the battery structure 50 and the operation structure 60 are reasonably arranged in the installation cavity, the space utilization rate is improved, the overall structure of the portable strong sound emergency device is more compact and portable, and the device is suitable for use in outdoor and harsh environments.
[0062] Specifically, the driving structure 30 can directly adopt the existing structure for driving the main loudspeaker 201 and the auxiliary loudspeaker 202, and details are not described herein.
[0063] Specifically, the control structure 40 includes a control board 401 and a power amplifier board 402.
[0064] Specifically, the battery structure 50 comprises a battery 501, a battery cover 502 and a waterproof silica gel plate 503, the main body structure 10 is provided with a recess for placing the battery 501 at the position of the battery structure 50, the battery 501 is a rechargeable battery or a disposable battery, the recess position is detachably provided with the battery cover 502, the battery cover 502 is detachably connected with the main body structure 10 through buckling or screwing, and the battery cover 502 is disassembled to facilitate replacement of the battery 501; since the portable loud emergency device is often used outdoors and in harsh environments, in order to prevent water and dust, the waterproof silica gel plate 503 is arranged in the battery cover 502.
[0065] Specifically, the operation structure 60 comprises a button 601, an interface 602, a knob 603 and a visual window 604, and the interface 602 can be divided into a power supply interface, a microphone interface, an AUX interface, an FM antenna interface and the like according to actual application conditions.
[0066] Specifically, the loudspeaker structure 20, the driving structure 30, the battery structure 50 and the operation structure 60 are electrically connected with the control structure 40, and the loudspeaker structure 20, the driving structure 30, the battery structure 50 and the operation structure 60 can adopt an existing mode in electrical connection with the control structure 40, and details are not repeated here.
[0067] In the embodiment of the utility model, the upper portion of the main body structure 10 is provided with a handle 70, and / or the outer portion of the main body structure 10 is provided with a foot pad 80.
[0068] Specifically, in order to facilitate the user to hold the portable loud emergency device, the handle 70 is arranged at the top of the main body structure 10.
[0069] Specifically, the foot pad 80 is a silica gel foot pad or a rubber foot pad, which plays a role of anti-skid when the portable loud emergency device is placed on the ground or a platform, and the foot pad 80 is connected and fixed with the main body structure 10 through adhesive or screwing.
[0070] The technical means disclosed in the utility model scheme is not limited to the technical means disclosed in the above-mentioned embodiment, and also includes the technical scheme composed of any combination of the above technical features. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principle of the utility model, and these improvements and refinements are also regarded as the protection scope of the utility model.
Claims
1. A portable loudsound emergency device, characterized in that, include: Main structure; A speaker structure, comprising a main speaker and an auxiliary speaker; At least one main speaker is provided at the front of the main structure, and at least one auxiliary speaker is provided at an angle on at least one side of the main structure. The main speaker and the auxiliary speaker are arranged radially.
2. The portable loud sound emergency device according to claim 1, characterized in that: The auxiliary speaker is tilted towards the main speaker, and the central axis of the auxiliary speaker and the central axis of the main speaker have an angle α, where 0° < α < 90°.
3. The portable loud sound emergency device according to claim 1, characterized in that: At least one auxiliary speaker is provided on each of the left and right sides of the main structure, and the main speaker and the auxiliary speakers are arranged radially along the horizontal or inclined direction; And / or, at least one auxiliary speaker is provided on both the upper and lower sides of the main structure, and the main speaker and the auxiliary speaker are arranged radially along the longitudinal direction or the inclined direction.
4. The portable loud sound emergency device according to claim 1, characterized in that: The main structure includes a fuselage, a first auxiliary wing plate, and a second auxiliary wing plate, wherein the first auxiliary wing plate is inclined forward. The main structure has an auxiliary opening at the sound outlet of the auxiliary speaker that connects to the outside, and the auxiliary opening is formed by the housing, the first auxiliary wing plate, and the second auxiliary wing plate.
5. The portable loud sound emergency device according to claim 4, characterized in that: The auxiliary opening includes a first opening and a second opening that are interconnected, the first opening being oriented in a first direction and the second opening being oriented in a second direction; The main structure has a main opening at the sound outlet of the main speaker that connects to the outside, and the main opening is oriented in a third direction. The first direction is perpendicular to the third direction.
6. The portable loud sound emergency device according to claim 5, characterized in that: The auxiliary opening is provided with an auxiliary protective structure, which includes a first bending portion and a second bending portion. The first bending portion and the second bending portion are connected to each other. The first bending portion is provided corresponding to the first opening, and the second bending portion is provided corresponding to the second opening. A main protective structure is provided at the main opening location; The second bend is disposed between the first bend and the main protective structure.
7. The portable loud sound emergency device according to claim 6, characterized in that: The auxiliary protective structure includes an auxiliary mesh cover and an auxiliary mesh cover dustproof net, wherein the auxiliary mesh cover is disposed outside the auxiliary mesh cover dustproof net; The main protective structure includes a main mesh cover and a dustproof mesh for the main mesh cover, with the main mesh cover located outside the dustproof mesh for the main mesh cover.
8. The portable loud sound emergency device according to claim 7, characterized in that: A first protective strip is provided on the edge where the first auxiliary wing plate and / or the second auxiliary wing plate are connected to the auxiliary protective structure, and the first protective strip protrudes toward the auxiliary protective structure; The edge of the main mesh cover is provided with a second protective strip, which protrudes toward the dustproof mesh of the main mesh cover.
9. The portable loud sound emergency device according to any one of claims 1-8, characterized in that: It also includes the drive structure, control structure, battery structure, and operation structure; The main structure has a hollow interior forming an installation cavity. The speaker structure is located at the front of the installation cavity, the drive structure and the control structure are located in the middle of the installation cavity, the battery structure is located at the lower part of the installation cavity, and the operating structure is located at the rear of the installation cavity and extends outside the main structure.
10. The portable loud sound emergency device according to any one of claims 1-8, characterized in that: The main structure is provided with a handle at the top; And / or, the exterior of the main structure is provided with foot pads.