Seismic zone demonstration sand table

Abstract

The utility model provides a seismic belt demonstration sand table. The seismic belt demonstration sand table comprises a fixing frame, a bearing assembly, a demonstration assembly and a sand table body. The bearing assembly is rotatably arranged at the top of the fixing frame and comprises a bearing plate and a bearing support. The sand table body is arranged on the top surface of the bearing plate, and the sand table body is provided with a seismic zone indicating lamp strip. The demonstration assembly comprises a main demonstration screen, a base, a demonstration support and a universal damping ball head. A connecting strip is arranged on the main demonstration screen, and a containing groove is formed in the side wall, away from the main demonstration screen, of the connecting strip. The demonstration support is arranged on the base in a liftable manner, and the top of the demonstration support is provided with a connecting seat. One end of the universal damping ball head is slidably arranged in the containing groove, and the other end of the universal damping ball head is hinged to the connecting base. According to the seismic belt demonstration sand table, the position of the demonstration assembly can be conveniently adjusted, various demonstration requirements can be conveniently met, the demonstration assembly can be folded and stored, and the storage and transportation difficulty of the device is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of demonstration equipment, and particularly relates to an earthquake zone demonstration sand table. Background Technique

[0002] A sand table is a demonstration model that represents topographic and geomorphic features in a micro-scale entity manner, facilitating people to understand macroscopic things from a microscopic perspective. It can usually be divided into various categories such as topographic sand tables, architectural sand tables, three-dimensional interactive virtual sand tables, and multimedia sand tables.

[0003] To facilitate the popularization of earthquake-related knowledge among the general public and overcome the limitations of traditional publicity means, earthquake zone demonstration sand tables are usually set up in existing popular science education venues, so that visitors can more intuitively understand the distribution locations of earthquake zones.

[0004] Since traditional earthquake zone demonstration sand tables can only show the distribution of earthquake zones and cannot explain relevant knowledge to visitors, technicians in this field will choose to install electronic explanation devices (such as audio playback devices or video playback devices) on the sand table, and then play relevant explanation content through the electronic explanation devices. However, simply installing the electronic explanation devices on the earthquake zone demonstration sand table will not only increase the space occupation of the sand table and the difficulty of storage and transportation of the sand table, but also cause the orientation of the electronic explanation devices to be relatively fixed, which is not conducive to flexible adjustment by on-site staff according to actual needs. Content of the Utility Model

[0005] In view of this, the utility model aims to propose an earthquake zone demonstration sand table to solve the above technical problems.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] An earthquake zone demonstration sand table includes: a fixing frame, a bearing assembly, a demonstration assembly, and a sand table body; the bearing assembly is rotatably arranged on the top of the fixing frame, the bearing assembly includes a bearing plate and a bearing bracket, and the bearing plate is arranged above the bearing bracket, and the bottom surface of the bearing plate is connected to the bearing bracket through a plurality of support rods; the sand table body is arranged on the top surface of the bearing plate, and an earthquake zone indicating light strip is arranged on the sand table body; the demonstration assembly includes: a main display screen, a base, a demonstration bracket, and a universal damping ball head; a connecting strip is arranged on the main display screen, and a receiving groove is arranged on the side wall of the connecting strip away from the main display screen; the base is arranged on the bearing bracket, the demonstration bracket is arranged on the base in a liftable manner, and a connecting seat is arranged on the top of the demonstration bracket; one end of the universal damping ball head is slidably arranged inside the receiving groove, and the other end is hinged to the connecting seat.

[0008] Further, the demonstration bracket includes a cross bar and two positioning rods. The two positioning rods are respectively arranged at both ends of the cross bar, and both positioning rods are perpendicular to the cross bar. The connecting seat is arranged on the cross bar, and the connecting seat and the positioning rods are respectively located on both sides of the cross bar. The base is provided with a positioning sleeve for accommodating the positioning rod. The positioning sleeve is provided with a first positioning hole, and a positioning pin is arranged in the first positioning hole. The positioning rod is also provided with a plurality of second positioning holes for accommodating the positioning pin, and the plurality of second positioning holes are arranged along the length direction of the positioning rod.

[0009] Further, the demonstration component includes an image collector and a first bearing rod. The demonstration bracket is further provided with a receiving sleeve, and the axial direction of the receiving sleeve is parallel to the lifting direction of the demonstration bracket. The first bearing rod is slidably arranged inside the receiving sleeve, and the image collector is arranged at the top end of the first bearing rod.

[0010] Further, the demonstration component includes an additional function board and a second bearing rod. One end of the connecting bar is provided with a receiving hole, one end of the second bearing rod is slidably arranged inside the receiving hole, and the other end is connected to the additional function board.

[0011] Further, the demonstration component further includes a plurality of sub-demonstration screens. The sub-demonstration screens are detachably arranged on the side wall of the bearing plate, and the plurality of sub-demonstration screens are evenly distributed in a ring on the periphery of the bearing plate.

[0012] Further, the bearing bracket includes an outer bearing ring and an inner bearing ring. The inner bearing ring is arranged inside the outer bearing ring. The inner bearing ring is connected to the bearing ring through a connecting rod, and the bottom ends of the plurality of support rods are all connected to the inner bearing ring.

[0013] Further, the fixing frame is provided with a mounting post. The mounting post is inserted into the bearing component along the inner bearing ring, and a driving gear ring is arranged on the mounting post. The bottom surface of the bearing plate is provided with a mounting sleeve, and a driving motor is arranged on the side wall of the mounting sleeve. A driving gear is arranged on the output shaft of the driving motor, and the driving gear meshes with the driving gear ring.

[0014] Further, the earthquake zone demonstration sand table further includes a power supply component. The power supply component includes: a current collector ring, a conductive support and a brush. The current collector ring is arranged on the bottom surface of the bearing plate, the conductive support is arranged inside the inner bearing ring, and the bottom end of the conductive support is connected to the fixing frame. The brush is arranged on the top of the conductive support, and the brush is in contact with the current collector ring.

[0015] Further, the bearing component further includes a protective sleeve. The protective sleeve is arranged between the bearing plate and the bearing bracket, and the inner diameter of the protective sleeve is larger than the outer diameter of the inner bearing ring.

[0016] Further, a plurality of pulleys are provided on the bottom surface of the bearing bracket, and a plurality of feet are also provided on the bottom surface of the fixing bracket.

[0017] Compared with the prior art, the earthquake zone demonstration sand table of the present utility model has the following advantages:

[0018] (1) For the earthquake zone demonstration sand table of the present utility model, its bearing assembly is rotatably arranged on the fixing bracket, and the main display screen can be installed on the bearing assembly through the base, the demonstration bracket and the universal damping ball head. During use, the staff can drive the bearing assembly to rotate according to the actual situation to adjust the position of the demonstration assembly, and can adjust the orientation of the main display screen through the lifting of the demonstration bracket and the universal damping ball head, so as to meet different exhibition requirements. In addition, during the transportation process of the device, the main display screen can be folded towards the area where the sand table body is located through the actions of the demonstration bracket and the universal damping ball head, thereby reducing the space occupied by the device and lowering the storage and transportation difficulty.

[0019] (2) For the earthquake zone demonstration sand table of the present utility model, its demonstration assembly further includes: an image collector, an additional function board and a plurality of secondary display screens. During the exhibition, the image collector can collect the image information near the device to judge whether there are visitors around the device, the additional function board can be used to display the text materials or two-dimensional codes associated with the publicity content, and the secondary display screens can facilitate the visitors at various angles to view the publicity content, thereby enhancing the publicity and promotion effect of the device.

[0020] (3) The earthquake zone demonstration sand table of the present utility model can obtain the electric energy in the external power supply through the cooperation of the slip ring and the carbon brush, and can reasonably distribute the driving motor and the driving gear ring to the bearing assembly and the fixing bracket, thereby reducing the complexity of the internal wiring of the device and ensuring the smooth rotation of the bearing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0022] Figure 1 is a schematic structural diagram of the earthquake zone demonstration sand table according to the embodiment of the present utility model;

[0023] Figure 2 is a schematic structural diagram of the fixing bracket, the bearing assembly and the power supply assembly according to the embodiment of the present utility model;

[0024] Figure 3 is a schematic structural diagram of the fixing bracket according to the embodiment of the present utility model;

[0025] Figure 4 Schematic diagram of the structure of the bearing assembly according to an embodiment of the present utility model;

[0026] Figure 5 Schematic diagram of the structure of the demonstration assembly according to an embodiment of the present utility model.

[0027] Explanation of reference numerals in the drawings:

[0028] 1 - fixing frame; 11 - mounting column; 12 - driving gear ring; 21 - bearing plate; 22 - support rod; 23 - outer bearing ring; 24 - inner bearing ring; 25 - connecting rod; 26 - mounting sleeve; 261 - driving motor; 262 - driving gear; 27 - protective sleeve; 28 - pulley; 3 - sand table body; 4 - main display screen; 41 - connecting strip; 42 - receiving groove; 5 - base; 51 - positioning sleeve; 511 - first positioning hole; 61 - connecting seat; 62 - cross bar; 63 - positioning rod; 64 - receiving sleeve; 7 - universal damping ball head; 81 - image collector; 82 - first bearing rod; 83 - additional function board; 84 - second bearing rod; 85 - secondary display screen; 91 - slip ring; 92 - conductive support; 93 - brush. Detailed implementation manners

[0029] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0033] A seismic zone demonstration sand table, the structure of which can be schematically shown by Figures 1 - 5 In this embodiment, the seismic zone demonstration sand table includes: a fixing frame 1, a bearing assembly, a demonstration assembly, and a sand table body 3. The bearing assembly is rotatably arranged on the top of the fixing frame 1, the demonstration assembly and the sand table body 3 are both arranged on the bearing assembly, and a seismic zone indicating light strip is provided on the sand table body 3. When the device is on display, visitors can intuitively understand the distribution of seismic zones through the seismic zone indicating light strip. The staff can play video publicity materials related to the distribution of seismic zones through the demonstration assembly, and can adjust the orientation of the demonstration assembly by rotating the bearing assembly, so as to make the device achieve a better publicity and promotion effect.

[0034] Specifically, the bearing assembly in this embodiment includes a bearing plate 21 and a bearing bracket. The bearing plate 21 is arranged above the bearing bracket, and the bottom surface of the bearing plate 21 is connected to the bearing bracket through a plurality of support rods 22. During assembly, the staff can install the sand table body 3 on the top surface of the bearing plate 21 so that the sand table body 3 rotates synchronously with the bearing plate 21 when the bearing assembly rotates.

[0035] Optionally, as Figure 4 shown, the bearing bracket in this device can include an outer bearing ring 23 and an inner bearing ring 24. The inner bearing ring 24 is arranged inside the outer bearing ring 23. The inner bearing ring 24 is connected to the bearing ring through a connecting rod 25, and the bottom ends of a plurality of support rods 22 are all connected to the inner bearing ring 24. Correspondingly, in order to realize the rotation of the bearing assembly on the fixing frame 1, as Figure 3As shown in the figure, in this embodiment, an installation post 11 may be provided on the fixing frame 1, and a driving gear ring 12 may be provided on the installation post 11. An installation sleeve 26 may be provided on the bottom surface of the bearing plate 21, a driving motor 261 may be provided on the side wall of the installation sleeve 26, and a driving gear 262 may be provided on the output shaft of the driving motor 261. During assembly, the staff can install the bearing assembly on the top of the fixing frame 1, so that the installation post 11 is inserted into the interior of the bearing assembly along the inner bearing ring 24, and the driving gear 262 is engaged with the driving gear ring 12. Since the driving gear ring 12 is provided on the installation post 11, when the driving motor 261 is started, the rotation of the driving gear ring 12 will cause relative rotation between the bearing assembly and the fixing frame 1.

[0036] As an alternative embodiment of this embodiment, in order to reduce the frictional resistance between the bearing assembly and the fixing frame 1, a plurality of pulleys 28 may be provided on the bottom surface of the bearing bracket, so as to reduce the rotation difficulty of the bearing assembly by means of the rotation of the pulleys 28. In addition, a plurality of feet are also provided on the bottom surface of the fixing frame 1, so that the staff can level the fixing frame 1 through the feet, thereby improving the placement stability of the device.

[0037] In the prior art, the assembly method between the electronic explanation device and the sand table is relatively primitive, so it is not conducive to the staff to flexibly adjust the position of the electronic explanation device, and at the same time, it will also cause the space occupation of the sand table to increase due to the installation of the electronic explanation device, thereby increasing the storage and transportation difficulty of the sand table. To solve this problem, the demonstration component in this embodiment includes: a main display screen 4, a base 5, a demonstration bracket and a universal damping ball head 7.

[0038] As Figure 1 and Figure 5 shown in the figure, a connecting strip 41 is provided on the main display screen 4, a receiving groove 42 is provided on the side wall of the connecting strip 41 away from the main display screen 4, the base 5 is arranged on the bearing bracket, the demonstration bracket is arranged on the base 5 in a liftable manner, and a connecting seat 61 is provided on the top of the demonstration bracket. One end of the universal damping ball head 7 is slidably arranged inside the receiving groove 42, and the other end is hinged to the connecting seat 61. During the exhibition, the staff can not only adjust the position of the demonstration component by rotating the bearing component, but also change the height of the main display screen 4 by lifting the demonstration bracket, and adjust the orientation of the main display screen 4 through the universal damping ball head 7, thereby improving the position flexibility of the main display screen 4 and meeting various different exhibition needs. In addition, when it is necessary to store or transport the device, the staff can also fold the main display screen 4 towards the area where the sand table body 3 is located through the actions of the demonstration bracket and the universal damping ball head 7, thereby reducing the space occupation of the device and reducing the storage and transportation difficulty of the device.

[0039] Optionally, in this embodiment, the demonstration bracket may include a cross bar 62 and two positioning rods 63. The two positioning rods 63 are respectively arranged at both ends of the cross bar 62, and both positioning rods 63 are perpendicular to the cross bar 62. The connecting seat 61 is arranged on the cross bar 62, and the connecting seat 61 and the positioning rods 63 are respectively located on both sides of the cross bar 62. Correspondingly, to realize the lifting action of the demonstration bracket, the base 5 may be provided with a positioning sleeve 51 for accommodating the positioning rod 63. A first positioning hole 511 is provided on the positioning sleeve 51, and a positioning pin is provided in the first positioning hole 511. A plurality of second positioning holes for accommodating the positioning pin should also be provided on the positioning rod 63, and the plurality of second positioning holes are arranged along the length direction of the positioning rod 63. When it is necessary to drive the demonstration bracket to perform a lifting action, the staff can first remove the positioning pin so that the positioning rod 63 can freely slide inside the positioning sleeve 51. When the demonstration bracket is adjusted to an appropriate height, the staff can insert the positioning pin into the second positioning hole along the first positioning hole 511, thereby locking the height position of the demonstration bracket.

[0040] To facilitate the judgment of whether there are visitors near the device, the demonstration component in this embodiment may include an image collector 81 and a first carrier rod 82. As Figure 5 shown, the demonstration bracket is provided with a receiving sleeve 64 whose axial direction is parallel to the lifting direction of the demonstration bracket. The first carrier rod 82 is slidably arranged inside the receiving sleeve 64, and the image collector 81 is arranged at the top of the first carrier rod 82. During use, the image collector 81 can be used to obtain images around the device, so that the staff or the upper controller can judge whether there are visitors according to the images, and then flexibly control the timing of the demonstration component to play the promotional and explanatory content. When it is necessary to store or transport the device, since the first carrier rod 82 is slidably arranged inside the receiving sleeve 64, the staff can also avoid increasing the overall space occupied by the device due to the installation of the image collector 81 through the sliding of the first carrier rod 82, improving the storage and transportation convenience of the device.

[0041] To facilitate visitors to view the promotional and explanatory content from various angles, the demonstration component may include a plurality of sub-demonstration screens 85. As Figure 1 shown, during assembly, the sub-demonstration screens 85 can be detachably connected to the side wall of the bearing plate 21 by means of bolt connection, and the plurality of sub-demonstration screens 85 should be evenly distributed in a ring around the circumference of the bearing plate 21. It should be noted that when the demonstration component includes a plurality of sub-demonstration screens 85, the staff can make the plurality of sub-demonstration screens 85 and the main demonstration screen 4 play the same or different promotional and explanatory content according to the actual exhibition requirements, thereby improving the exhibition effect of the device.

[0042] In addition, to improve the interactivity between the demonstration component and the visitors, the demonstration component may further include an additional function board 83 and a second carrier rod 84. As Figure 5As shown, one end of the connecting bar 41 is provided with a receiving hole, one end of the second carrying rod 84 is slidably arranged inside the receiving hole, and the other end is connected to the additional function board 83. It should be noted that the additional function board 83 in this embodiment can be used to display text materials or two-dimensional codes associated with the promotional content, so that visitors can obtain the promotional and explanatory content by picking up the text materials or scanning the two-dimensional codes. Correspondingly, the staff can also display other content on the additional function board 83 according to actual needs, and can drive the second carrying rod 84 to slide inside the receiving hole when the device needs to be stored and transported, so as to reduce the overall space occupied by the device.

[0043] To facilitate the power supply to the seismic zone indicating light strip and the demonstration components on the sand table body 3 and reduce the complexity of the circuits inside the device, the seismic zone demonstration sand table in this embodiment further includes a power supply component. Specifically, the power supply component may include: a slip ring 91, a conductive support 92, and a brush 93. As Figure 3 and Figure 4 shown, the slip ring 91 is arranged on the bottom surface of the bearing plate 21, the conductive support 92 is arranged inside the inner bearing ring 24, the bottom end of the conductive support 92 is connected to the fixing frame 1, and the brush 93 is arranged on the top of the conductive support 92. After the assembly is completed, the brush 93 will be in contact with the slip ring 91, so that the electrical energy of the external power supply can be transmitted to the inside of the slip ring 91 through the brush 93. Correspondingly, the electrical components in the device (such as the seismic zone indicating light strip, the drive motor 261, the main display screen 4, the image collector 81, and the secondary display screen 85) can be connected to the slip ring 91 through wires, so that each electrical component can obtain sufficient power supply.

[0044] As another alternative implementation of this embodiment, to protect the power supply component, the bearing component in this embodiment further includes a protective sleeve 27, and the inner diameter of the protective sleeve 27 should be greater than the outer diameter of the inner bearing ring 24. During assembly, the protective sleeve 27 should be arranged between the bearing plate 21 and the bearing bracket, so as to isolate the power supply component from the external environment and prevent visitors from coming into contact with the power supply component.

[0045] The effects of the above solutions are described below:

[0046] This embodiment provides a seismic zone demonstration sand table, which can drive the bearing component to rotate according to the actual situation to adjust the position of the demonstration component, and can flexibly adjust the height and orientation of the main display screen, so as to meet different exhibition needs. Secondly, the device can fold and store the demonstration component during transportation, so as to reduce the space occupied by the device and the difficulty of storage and transportation. In addition, the device can also make the demonstration component have multiple functions through the image collector, the additional function board, and multiple secondary demonstration screens, so as to improve the exhibition effect of the device.

[0047] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An earthquake zone demonstration sand table, characterized in that, Including: A fixing frame (1), a bearing component, a demonstration component, and a sand table body (3); the bearing component is rotatably arranged on the top of the fixing frame (1), the bearing component includes a bearing plate (21) and a bearing bracket, and the bearing plate (21) is arranged above the bearing bracket, and the bottom surface of the bearing plate (21) is connected to the bearing bracket through a plurality of support rods (22); the sand table body (3) is arranged on the top surface of the bearing plate (21), and an earthquake zone indicating light strip is arranged on the sand table body (3); the demonstration component includes: a main display screen (4), a base (5), a demonstration bracket, and a universal damping ball head (7); A connecting strip (41) is arranged on the main display screen (4), and a receiving groove (42) is arranged on the side wall of the connecting strip (41) away from the main display screen (4); the base (5) is arranged on the bearing bracket, the demonstration bracket is arranged on the base (5) in a liftable manner, and a connecting seat (61) is arranged at the top of the demonstration bracket; one end of the universal damping ball head (7) is slidably arranged inside the receiving groove (42), and the other end is hinged to the connecting seat (61).

2. The earthquake zone demonstration sand table according to claim 1, characterized in that: The demonstration bracket includes a cross bar (62) and two positioning rods (63), the two positioning rods (63) are respectively arranged at both ends of the cross bar (62), and the two positioning rods (63) are both perpendicular to the cross bar (62); the connecting seat (61) is arranged on the cross bar (62), and the connecting seat (61) and the positioning rod (63) are respectively located on both sides of the cross bar (62); a positioning sleeve (51) for accommodating the positioning rod (63) is arranged on the base (5), a first positioning hole (511) is arranged on the positioning sleeve (51), and a positioning pin is arranged in the first positioning hole (511), and a plurality of second positioning holes for accommodating the positioning pin are further arranged on the positioning rod (63), and the plurality of second positioning holes are arranged along the length direction of the positioning rod (63).

3. The earthquake zone demonstration sand table according to claim 1, characterized in that: The demonstration component includes an image collector (81) and a first bearing rod (82), a receiving sleeve (64) is further arranged on the demonstration bracket, and the axial direction of the receiving sleeve (64) is parallel to the lifting direction of the demonstration bracket; the first bearing rod (82) is slidably arranged inside the receiving sleeve (64), and the image collector (81) is arranged at the top end of the first bearing rod (82).

4. The earthquake zone demonstration sand table according to claim 1, characterized in that: The demonstration component includes an additional function board (83) and a second bearing rod (84), a receiving hole is arranged at one end of the connecting strip (41), one end of the second bearing rod (84) is slidably arranged inside the receiving hole, and the other end is connected to the additional function board (83).

5. The seismic zone demonstration sand table according to claim 1, characterized in that: The demonstration component further includes a plurality of sub-display screens (85), the sub-display screens (85) are detachably arranged on the side wall of the bearing plate (21), and the plurality of sub-display screens (85) are evenly distributed in a ring on the periphery of the bearing plate (21).

6. The earthquake zone demonstration sand table according to claim 1, characterized in that: The bearing bracket includes an outer bearing ring (23) and an inner bearing ring (24), the inner bearing ring (24) is arranged inside the outer bearing ring (23), the inner bearing ring (24) is connected to the bearing ring through a connecting rod (25), and the bottom ends of the plurality of support rods (22) are all connected to the inner bearing ring (24).

7. The earthquake zone demonstration sand table according to claim 6, characterized in that: The fixing bracket (1) is provided with a mounting post (11), the mounting post (11) is inserted into the interior of the bearing assembly along the inner bearing ring (24), and a driving gear ring (12) is provided on the mounting post (11); a mounting sleeve (26) is provided on the bottom surface of the bearing plate (21), a driving motor (261) is provided on the side wall of the mounting sleeve (26), a driving gear (262) is provided on the output shaft of the driving motor (261), and the driving gear (262) meshes with the driving gear ring (12).

8. The demonstration sand table of seismic zone according to claim 6, characterized in that: The earthquake zone demonstration sand table further includes a power supply assembly, and the power supply assembly includes: a slip ring (91), a conductive bracket (92) and a brush (93); the slip ring (91) is arranged on the bottom surface of the bearing plate (21), the conductive bracket (92) is arranged inside the inner bearing ring (24), and the bottom end of the conductive bracket (92) is connected to the fixing bracket (1); the brush (93) is arranged on the top of the conductive bracket (92), and the brush (93) is in contact with the slip ring (91).

9. The demonstration sand table of seismic zone according to claim 8, characterized in that: The bearing assembly further includes a protective sleeve (27), the protective sleeve (27) is arranged between the bearing plate (21) and the bearing bracket, and the inner diameter of the protective sleeve (27) is larger than the outer diameter of the inner bearing ring (24).

10. The seismic zone demonstration sand table according to claim 1, characterized in that: A plurality of pulleys (28) are provided on the bottom surface of the bearing bracket, and a plurality of foot cups are further provided on the bottom surface of the fixing bracket (1).

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