Exhibition cabinet with multi-dimensional vibration reduction and isolation horizontal mechanism and energy consumption limiting function

Abstract

The invention relates to the technical field of cultural relic and important exhibit protection, and discloses an exhibit cabinet with a double-layer orthogonal horizontal translation seismic isolation structure and an energy consumption limiting function. The exhibit cabinet comprises a bottom rigid partition plate, a middle rigid partition plate, an upper rigid partition plate, an exhibit appearance cabinet body, a double-layer scissor type horizontal translation mechanism, a shock absorption and isolation cushion block, an energy consumption anti-collision strip, an external enclosure cabinet body and a bottom balancing weight. The first layer of horizontal translation seismic isolation mechanism is arranged between the bottom rigid partition plate and the middle rigid partition plate, the second layer of horizontal translation seismic isolation mechanism is arranged between the middle rigid partition plate and the upper rigid partition plate, and the two layers of mechanisms are orthogonally arranged in the horizontal plane; each layer of mechanism is composed of scissor type translation units which are arranged side by side in the left-right direction, each translation unit is of a multi-hinge-point closed constraint structure formed by hinging a plurality of long rods, short rods and shaft pins, and approximate pure translation of the upper structure relative to the lower structure is achieved. A shock absorption and isolation cushion block is arranged below the bottom rigid partition plate to provide vertical flexible support; energy dissipation anti-collision strips are arranged on the periphery to conduct compression energy dissipation and limiting under the large-displacement working condition; the balancing weight is arranged on the lower portion to lower the overall gravity center and improve the anti-overturning capacity. Low-rigidity translational vibration isolation can be achieved in the two orthogonal horizontal directions, the vertical vibration reduction function and the tail end energy dissipation limiting function are achieved, the influence of earthquakes and environment vibration on exhibits is effectively reduced, and the anti-overturning performance and the safety protection performance of the exhibits with the high gravity center are improved.

Description

Technical Field

[0001] This invention relates to the field of cultural relic and important exhibit protection technology, specifically to an exhibit cabinet with a multi-dimensional vibration reduction and isolation horizontal mechanism and energy dissipation limiting function, which is suitable for earthquake and vibration reduction protection of high-value exhibits in museums, exhibition halls and important public places. Background Technology

[0002] Under the influence of external disturbances such as earthquakes, traffic vibrations, human activity, and sudden shocks, ground vibrations and environmental vibrations typically exhibit significant multidimensional characteristics, including both vertical vibration components and vibration components propagating along different horizontal directions. Especially under earthquake action, ground motion is characterized by strong randomness, wide bandwidth, and complex directions, often exhibiting significant acceleration amplitudes in various aspects simultaneously.

[0003] Cultural relics and high-value exhibits displayed in museums, exhibition halls, and other venues are typically characterized by brittleness, high center of gravity, and irregular structures. Under multidimensional vibrations, they are highly susceptible to damage such as slippage, collisions, overturning, and even complete collapse. Actual earthquake damage surveys show that even in small to medium-sized earthquakes or non-structural strong vibration events, a large number of cultural relics are damaged not due to the collapse of the main building, but rather due to the lack of effective vibration reduction and anti-overturning measures in the display system. The economic losses and the value of the damaged cultural relics are undoubtedly enormous, even incalculable. Therefore, vibration reduction control and safety protection for these relics have significant engineering, social, and cultural implications.

[0004] Existing exhibit protection measures mainly include rigid fixing, soft padding support, unidirectional sliding vibration isolation devices, and simple dampers. While rigid fixing can limit displacement, it directly transfers vibration energy to the exhibit, easily causing brittle failure. Soft padding support structures can mitigate impact to some extent, but their vibration isolation direction is limited, making it difficult to simultaneously handle horizontal and vertical vibrations. Unidirectional vibration isolation devices typically only function in one horizontal direction, offering limited protection under complex multidirectional ground motion. Furthermore, many existing vibration isolation structures lack effective limiting and energy dissipation measures when large displacements occur, posing a risk of structural instability and overturning.

[0005] Therefore, the field of cultural relic and exhibit protection urgently needs a comprehensive protective structure that can simultaneously achieve multi-dimensional horizontal and vertical vibration reduction, while also possessing energy dissipation, limiting, and anti-tipping functions. However, multi-dimensional vibration isolation systems present significant design challenges in terms of structural layout, space utilization, and stability control. Horizontal translational vibration isolation mechanisms have gradually gained attention due to their advantages such as low equivalent stiffness, controllable displacement, and clear structural form. By employing a double-layered orthogonally arranged horizontal translational mechanism, vibrations in different horizontal directions can be isolated separately, thereby significantly improving multi-directional vibration isolation performance.

[0006] On the other hand, highly elastic materials such as polyurethane rubber have adjustable elastic modulus, excellent damping performance, and good durability, enabling them to achieve good energy dissipation while bearing vertical loads. Therefore, they are widely used in vibration reduction and isolation. Combining polyurethane rubber pads with a double-layer horizontal translation mechanism, supplemented by lower counterweight adjustment and external shielding protection structures, helps to meet multi-dimensional vibration isolation requirements while addressing the stability and safety issues of the exhibit display system under large displacement conditions.

[0007] Based on the above-mentioned needs and technical difficulties, the present invention proposes an exhibition display cabinet with three-dimensional vibration isolation, energy dissipation limiting and anti-tipping balance functions. Summary of the Invention

[0008] This invention relates to the field of cultural relic and important exhibit protection technology, and particularly to an exhibit cabinet with a double-layer orthogonal horizontal translational seismic isolation structure and energy dissipation limiting function. It is suitable for earthquake and environmental vibration protection of cultural relics and exhibits with high centers of gravity and significant value in museums, exhibition halls, and other venues. Addressing the problems of existing exhibit cabinets' weak anti-overturning capacity under earthquake action, large horizontal acceleration response, and difficulty in achieving pure translational displacement, this invention provides an exhibit cabinet with a double-layer orthogonal horizontal translational mechanism and end-effector energy dissipation limiting function. By constructing an orthogonally distributed scissor-type translational mechanism, combined with flexible bottom support, lateral energy dissipation limiting, and a center-of-gravity optimized structure, the exhibit cabinet maintains posture stability and effectively reduces energy input under complex vibration environments.

[0009] To achieve the above objectives, the exhibit cabinet of the present invention includes an exterior cabinet (1), an upper rigid partition (2), an energy-dissipating anti-collision strip (3), a horizontal translation mechanism with long rods one (4) to four (7), a pivot pin (8), a horizontal translation mechanism with short rods one (9) to four (12), a middle rigid partition (13), an outer enclosing cabinet (14), a bottom counterweight (15), a bottom rigid partition (16), and vibration damping pads (17). The exterior cabinet (1) adopts a steel-glass composite structure, and its bottom is rigidly fixedly connected to the upper rigid partition (2). The bottom rigid partition (16) is located at the bottom of the exhibit cabinet, and four vibration damping pads (17) are symmetrically arranged on its lower surface and connected to the ground to provide vertical elastic support and dissipate some vibration energy. The middle rigid partition (13) is located above the bottom rigid partition (16). The lower and upper surfaces of the partition are respectively provided with vertical shaft pin holes arranged orthogonally to connect the upper and lower horizontal translational vibration isolation mechanisms, so that the display cabinet has translational vibration isolation capability in two orthogonal directions in the horizontal plane.

[0010] Each layer of horizontal translational seismic isolation mechanism consists of two sets of parallel scissor-type translational units. Each set of units includes four long rods, four short rods, and a pivot pin. Long rod one (4) and long rod two (5) form the upper long rod group. The two rods are arranged in a cross shape in space but are not connected to each other: the tail end of long rod one (4) is hinged to the front right side of the lower surface of the upper rigid partition (2), and the tail end of long rod two (5) is hinged to the front left side of the lower surface of the upper rigid partition (2). Long rod three (6) and long rod four (7) form the lower long rod group. The two rods are also crossed in space but are not connected to each other: the tail end of long rod three (6) is hinged to the front left side of the upper surface of the middle rigid partition (13), and the tail end of long rod four (7) is hinged to the front right side of the upper surface of the middle rigid partition (13). The upper and lower sets of long rods are interconnected through a cross-connection: long rod one (4) is connected to the second pin hole at the front end of the lower long rod four (7) on the opposite side by a pin (8); long rod two (5) is connected to the second pin hole at the front end of the lower long rod three (6) on the opposite side by a pin (8). Through this cross-connection on opposite sides, a stable scissor-type support mechanism is formed.

[0011] To achieve translational constraints, the four short rods are connected as follows: Short rod 1 (9) connects the third hole of long rod 4 (7) to the first hole of long rod 2 (5); Short rod 2 (10) connects the third hole of long rod 3 (6) to the first hole of long rod 1 (4); Short rod 3 (11) connects the third hole of long rod 1 (4) to the first hole of long rod 3 (6); Short rod 4 (12) connects the third hole of long rod 2 (5) to the first hole of long rod 4 (7).

[0012] When the lower partition moves horizontally, the long rod and the short rod rotate in tandem, ensuring that the upper partition only produces low-frequency translational displacement relative to the lower partition and maintains a parallel posture, effectively suppressing rotation and tilting.

[0013] The outer enclosure (14) is set around the periphery of the first and second layer structures and surrounds them from the side to form a closed protective space. The bottom counterweight (15) is set in the four corner areas of the bottom of the outer enclosure (14) to increase the overall center of gravity and improve the anti-overturning stability by increasing the lower mass. The energy-dissipating anti-collision strip (3) is fixedly arranged along the outer circumferential edge of the upper rigid partition (2), the middle rigid partition (13) and the bottom rigid partition (16), and an initial gap is reserved with the inner wall of the outer enclosure (14). When the horizontal displacement exceeds the set range, the energy-dissipating anti-collision strip (3) dissipates energy through material compression deformation, realizes end limit and prevents the mechanism from becoming unstable. Through the synergistic effect of the above structures, the present invention can significantly reduce the horizontal and vertical vibration input, ensure that the exhibits do not overturn or lift under strong earthquake conditions, and the horizontal vibration reduction rate can reach more than 66%, effectively improving the safety of cultural relics in complex vibration environments.

[0014] Compared with the prior art, the advantages of the present invention are as follows:

[0015] Compared to existing exhibit cabinet structures, this invention constructs a multi-dimensional vibration isolation system within the exhibit cabinet, consisting of two layers of scissor-type horizontal translational mechanisms. This allows the exhibit cabinet's exterior to generate low-stiffness translational displacements in two orthogonal horizontal directions under earthquakes and environmental vibrations. Structurally, this avoids the problem of traditional rigid supports or unidirectional vibration isolation structures directly transmitting ground vibrations to the exhibit. Through the geometric constraints of the scissor-type translational mechanisms, the upper exhibit cabinet maintains a basically parallel posture while undergoing horizontal displacement, effectively suppressing rotational and tilting responses and significantly reducing the horizontal acceleration experienced by the exhibit. This is particularly suitable for protecting cultural relics exhibits with high centers of gravity and high sensitivity to overturning and collisions.

[0016] This invention employs a structure with two layers of scissor-type horizontal translational mechanisms arranged orthogonally in the horizontal plane. This allows the display case to have vibration isolation capabilities in both orthogonal horizontal directions. Compared to existing structures that only provide vibration isolation in a single direction or rely on the deformation of flexible materials, this design can simultaneously cope with complex vibration conditions input from multiple directions during actual earthquakes, improving the stability and reliability of the overall vibration isolation effect. The vertical shaft pin holes on the upper and lower surfaces of the central rigid partition are arranged orthogonally, allowing the two layers of mechanisms to work independently yet collaboratively in space. The structural hierarchy is clear, the force transmission path is well-defined, and it is easy to fully reconstruct its spatial relationship through textual description.

[0017] The scissor-type translational mechanism of this invention adopts a structure with multiple long and short rods cross-constrained, which has higher geometric stability compared to traditional single scissor or simplified linkage structures. By directly hinged long rods on the same side and cross-connected long rods on opposite sides through short rods, the linkages form a multi-point cooperative constraint relationship during movement. This makes it less prone to eccentric loading and jamming during horizontal displacement, thus ensuring a smoother translational response of the upper display cabinet under seismic action and reducing the risk of local stress concentration and motion instability caused by structural asymmetry.

[0018] In the vertical direction, this invention provides stable vertical elastic support for the display case by placing polyurethane vibration damping pads between the bottom rigid partition and the ground, effectively attenuating vertical vibration input and forming a multi-dimensional synergistic vibration damping system with the horizontal translational vibration isolation mechanism. Compared with existing structures that rely solely on horizontal vibration isolation or solely on vertical vibration damping, this invention can simultaneously reduce the impact of both horizontal and vertical vibrations on the exhibits, which is more in line with the three-dimensional characteristics of actual earthquakes and environmental vibrations.

[0019] This invention incorporates energy-dissipating anti-collision strips around the periphery of the scissor-type translational mechanism and pre-designs displacement gaps in the structural design. This allows the device to maintain good vibration isolation performance under small displacement conditions, while under large displacement conditions, the compression deformation of the energy-dissipating anti-collision strips effectively limits movement and dissipates energy, thereby preventing the scissor-type translational mechanism from entering a geometrically unstable state or experiencing rigid collisions. Compared to existing structures that lack reliable limiting measures or only employ rigid limiting, this invention significantly improves safety and reliability under large earthquake conditions while maintaining vibration isolation performance.

[0020] Furthermore, this invention effectively lowers the overall center of gravity of the display case by incorporating a bottom counterweight within the lower enclosed cabinet, thereby improving its anti-tipping stability. The counterweight is rigidly fixed to the bottom rigid partition, preventing slippage or collision under seismic vibrations, thus enhancing the stability of the display case under strong earthquakes from an overall structural perspective. Compared to existing methods that increase cabinet rigidity or simply add weight to the top structure, this invention achieves improved stability through concentrated lower counterweights, without increasing upper inertial response, which helps reduce the overall dynamic response under seismic loads.

[0021] In summary, this invention, through the synergistic combination of a multi-layered scissor-type translational vibration isolation structure, vertical vibration reduction and isolation support, energy dissipation limiting protection, and low center of gravity steady-state design, outperforms existing display case structures in terms of structural safety, vibration isolation effect, and applicability. It can effectively improve the protection level of cultural relics and important exhibits under earthquakes and environmental vibrations without significantly increasing structural complexity. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the present invention. Figure 2 This is a front view of the present invention. Figure 3 Axonometric drawing of the present invention Figure 4 Axonometric view of the internal structure of the present invention Figure 1 Figure 5 Axonometric view of the internal structure of the present invention Figure 2 Figure 6 This is a schematic diagram of the short rod of the horizontal translation mechanism of the present invention. Figure 7 This is a schematic diagram of the long rod of the horizontal translation mechanism of the present invention. Figure 8 This is a schematic diagram of the bottom rigid partition of the present invention. Figure 9 This is a schematic diagram of the central rigid partition of the present invention. In the figure: Exhibit exterior cabinet (1), upper rigid partition (2), energy-dissipating anti-collision strip (3), horizontal translation mechanism long rod one (4), horizontal translation mechanism long rod two (5), horizontal translation mechanism long rod three (6), horizontal translation mechanism long rod four (7), shaft pin (8), horizontal translation mechanism short rod one (9), horizontal translation mechanism short rod two (10), horizontal translation mechanism short rod three (11), horizontal translation mechanism short rod four (12), middle rigid partition (13), external enclosure cabinet (14), bottom counterweight (15), bottom rigid partition (16), and vibration damping pad (17). Detailed Implementation

[0023] The exhibit cabinet in this embodiment includes: an exterior cabinet (1), an upper rigid partition (2), an energy-dissipating anti-collision strip (3), a horizontal translation mechanism long rod one (4), a horizontal translation mechanism long rod two (5), a horizontal translation mechanism long rod three (6), a horizontal translation mechanism long rod four (7), a pivot pin (8), a horizontal translation mechanism short rod one (9), a horizontal translation mechanism short rod two (10), a horizontal translation mechanism short rod three (11), a horizontal translation mechanism short rod four (12), a middle rigid partition (13), an outer enclosing cabinet (14), a bottom counterweight (15), a bottom rigid partition (16), and a shock-absorbing pad (17).

[0024] The exterior cabinet (1) of the exhibit adopts a steel-glass composite structure, with the frame material being Q235 steel plate with a thickness of 3 m. The upper rigid partition (2) is rigidly fixedly connected to the bottom plate of the exterior cabinet (1), and the effective area of ​​the bearing platform is 450 mm × 450 mm, with a platform flatness of ≤0.3 mm, used to stably support the cultural relics.

[0025] In this embodiment, four identical horizontal translation mechanisms are set up, which are respectively arranged between the bottom rigid partition (16) and the middle rigid partition (13), i.e., the first layer mechanism, and between the middle rigid partition (13) and the upper rigid partition (2), i.e., the second layer mechanism. The two sets of mechanisms in the first layer are arranged in parallel along the left-right direction of the cabinet, i.e., the X direction, and the two sets of mechanisms in the second layer are arranged in parallel along the front-back direction of the cabinet, i.e., the Y direction. The upper and lower layers of mechanisms are arranged orthogonally.

[0026] The bottom rigid partition (16) is made of Q235 steel plate, and four vibration damping pads (17) are symmetrically arranged on the lower surface. The material is polyurethane rubber. The middle rigid partition (13) is located above it and has a thickness of 12 mm. The outer enclosure cabinet (14) is set on the outer periphery of the first and second layer mechanisms and surrounds them from the side to form a closed space. The bottom counterweight (15) is arranged in the four corner areas of the bottom of the inner part of the outer enclosure cabinet (14). The energy-dissipating anti-collision strip (3) is fixedly arranged along the outer periphery of the upper rigid partition (2), the middle rigid partition (13) and the bottom rigid partition (16). The material is 70 Shore A polyurethane rubber, with a width of 25 mm and a thickness of 8 mm. A 5 mm initial gap is reserved between it and the inner wall of the outer enclosure cabinet (14) for end limit energy dissipation.

[0027] The structure and link-by-link connection of the "horizontal translation mechanism" are described in detail below: Each set of horizontal translation mechanism consists of four long rods and four short rods. The long rods are divided into two groups: long rod one (4) and long rod two (5) are the first group, and long rod three (6) and long rod four (7) are the second group. The long rods are provided with the first, second and third front pin holes at equal intervals along the rod length in the area near the front end.

[0028] The following uses a set of horizontal translational mechanisms on the front side of the second layer (placed front and back) as an example to illustrate the connection relationship: Long rod 1 (4) and long rod 2 (5) form the upper long rod group. The two rods are arranged in a cross shape in space but are not connected to each other: the tail end of long rod 1 (4) is hinged to the front right side of the lower surface of the upper rigid partition (2), and the tail end of long rod 2 (5) is hinged to the front left side of the lower surface of the upper rigid partition (2). Long rod 3 (6) and long rod 4 (7) form the lower long rod group. The two rods are also crossed in space but are not connected to each other: the tail end of long rod 3 (6) is hinged to the front left side of the upper surface of the middle rigid partition (13), and the tail end of long rod 4 (7) is hinged to the front right side of the upper surface of the middle rigid partition (13).

[0029] The upper and lower sets of long rods are interconnected through a cross-connection: long rod one (4) is connected to the second pin hole at the front end of the lower long rod four (7) on the opposite side by a pin (8); long rod two (5) is connected to the second pin hole at the front end of the lower long rod three (6) on the opposite side by a pin (8). Through this cross-connection on opposite sides, a stable scissor-type support mechanism is formed.

[0030] To achieve translational constraints, the four short rods are connected as follows: Short rod 1 (9) connects the third hole of long rod 4 (7) to the first hole of long rod 2 (5); Short rod 2 (10) connects the third hole of long rod 3 (6) to the first hole of long rod 1 (4); Short rod 3 (11) connects the third hole of long rod 1 (4) to the first hole of long rod 3 (6); Short rod 4 (12) connects the third hole of long rod 2 (5) to the first hole of long rod 4 (7).

[0031] When an earthquake occurs, its working principle is as follows: Ground vibration is filtered by the pad block (17) to remove vertical energy. When horizontal displacement occurs, the first set of long rods (4, 5) and the second set of long rods (6, 7) open and close synchronously through their respective cross connection points. With the help of the parallelogram constraint formed by the four short rods, it ensures that the upper rigid partition (2) only produces low-frequency translational motion relative to the middle rigid partition (13). When the displacement exceeds 55 mm, the energy-dissipating anti-collision strips (3) at the edges of each partition contact the inner wall of the enclosed cabinet (14) to compress and absorb energy. With the help of the bottom counterweight block (15) lowering the system's center of gravity, it ensures that the device does not overturn and the exhibits remain stable.

[0032] To verify the vibration reduction and isolation effect, this embodiment conducted a full-machine test on an electro-hydraulic servo three-dimensional seismic simulation platform. The measuring points were arranged as the input acceleration on the platform and the response acceleration at the exhibit support platform inside the cabinet (X, Y, and Z directions). A strong earthquake input condition was selected: the peak acceleration input on the platform was 0.36 g in the X direction, 0.34 g in the Y direction, and 0.25 g in the Z direction; the peak response at the exhibit support platform was measured to be 0.12 g in the X direction, 0.11 g in the Y direction, and 0.15 g in the Z direction, corresponding to peak vibration reduction rates of 66.7% in the X direction, 67.6% in the Y direction, and 40.0% in the Z direction. Simultaneously, the displacement response was recorded: the maximum translational displacements in the two horizontal directions were 58 mm and 56 mm, respectively. After the displacement reached 55 mm, the energy-dissipating anti-collision strip entered the contact compression energy dissipation stage, and the final peak displacement was limited to within 60 mm. After the test, no pin dislodgement, long rod buckling, short rod breakage, or loose partition connection was observed. The device did not overturn or lift its feet, and the exhibit's posture remained stable.

Claims

1. A display case with a multi-dimensional vibration damping and isolation horizontal mechanism and energy dissipation limiting function, characterized in that, include: The exhibit includes an exterior cabinet (1), an upper rigid partition (2), a middle rigid partition (13), a bottom rigid partition (16), an outer enclosing cabinet (14), energy-dissipating anti-collision strips (3) set on the edges of each partition, and two layers of orthogonal horizontal translation mechanisms arranged between the partitions. The lower surface of the bottom rigid partition (16) is provided with shock-absorbing pads (17) to provide vertical elastic support. The upper rigid partition (2) is rigidly fixedly connected to the bottom plate of the exhibit exterior cabinet (1) to support the exhibit. The middle rigid partition (13) is set between the bottom rigid partition (16) and the upper rigid partition (2). A set of first-layer horizontal translation mechanisms arranged parallel to the first horizontal direction is provided between the lower surface of the middle rigid partition (13) and the upper surface of the bottom rigid partition (16). A set of second-layer horizontal translation mechanisms arranged parallel to the second horizontal direction is provided between the upper surface of the middle rigid partition (13) and the lower surface of the upper rigid partition (2). The mechanism is such that the first horizontal direction and the second horizontal direction are orthogonal to each other in the horizontal plane; each layer of horizontal translation mechanism consists of two sets of scissor-type translation units, each set of units includes four long rods (4, 5, 6, 7) and four short rods (9, 10, 11, 12), wherein the two upper long rods (4, 5) and the two lower long rods (6, 7) are arranged in a cross shape in space, and the upper long rod passes through its front section shaft pin hole and the lower long rod on the opposite side passes through the front section shaft pin hole through the shaft pin (8). The four short rods are hinged to the first and third shaft pin holes at the front end of the interconnecting long rod, forming a parallelogram geometric constraint structure with a closed space. The outer enclosure cabinet (14) is set on the outer periphery of the first and second layer mechanisms and surrounds them from the side to form an internal closed space. An initial gap is provided between the energy-dissipating anti-collision strip (3) and the inner wall of the outer enclosure cabinet (14) to limit and dissipate energy through compression deformation when the mechanism is displaced.

2. The display case according to claim 1, characterized in that, The first (4) to the fourth (7) of the long rods are provided with first, second and third shaft pin holes at equal intervals along the length of the rod in the area near the front end. The two sets of long rods are hinged to each other through their respective second shaft pin holes to form a linkage.

3. The display case according to claim 1, characterized in that, The connection relationship of the four short rods is as follows: short rod one (9) connects the third shaft pin hole of long rod four (7) to the first shaft pin hole of long rod two (5); short rod two (10) connects the third shaft pin hole of long rod three (6) to the first shaft pin hole of long rod one (4); short rod three (11) connects the third shaft pin hole of long rod one (4) to the first shaft pin hole of long rod three (6); short rod four (12) connects the third shaft pin hole of long rod two (5) to the first shaft pin hole of long rod four (7).

4. The display case according to claim 1, characterized in that, The tail ends of the two upper long rods (4, 5) are respectively hinged to the left and right sides of the lower surface of the upper partition, and the tail ends of the two lower long rods (6, 7) are respectively hinged to the left and right sides of the upper surface of the lower partition.

5. The display case according to claim 1, characterized in that, The lower surface of the central rigid partition (13) is provided with a vertical shaft pin hole group that cooperates with the first layer horizontal translation mechanism, and the upper surface is provided with a vertical shaft pin hole group that cooperates with the second layer horizontal translation mechanism. The arrangement directions of the shaft pin hole groups on the upper and lower surfaces are orthogonal to each other.

6. The display case according to claim 1, characterized in that, The four corner areas of the bottom of the outer enclosure cabinet (14) are provided with bottom counterweights (15). The bottom counterweights (15) are fixed by limiting members to lower the overall center of gravity of the system and improve the anti-overturning stability.

7. The display case according to claim 1, characterized in that, The energy-dissipating anti-collision strip (3) is made of polyurethane material and is arranged on the circumferential edge of each layer of rigid partition to contact and compress with the inner wall of the external enclosure cabinet (14) during horizontal displacement.

8. The display case according to claim 1, characterized in that, The vibration damping pads (17) are made of polyurethane material and are symmetrically installed at the four bottom corners of the bottom rigid partition (16) to provide vertical vibration damping support.

Images