Buffering keel structure, modular floor unit and quick assembly sports floor system

Abstract

The invention discloses a buffer keel structure, a modular floor unit and a quick assembly sports floor system, and relates to the technical field of sports floors, the structure comprises a composite keel and a plurality of elastic pads; the elastic cushion is fixed to the bottom face of the composite keel, and the buffering supporting face forms a first buffering area and a second buffering area which are different in height. Under the normal load condition, the higher first buffer area independently bears the load and provides first-stage buffer; when the load exceeds a preset threshold value, the first buffer area is compressed to be flush with the second buffer area, the first buffer area and the second buffer area bear the load together, and secondary buffer is provided. By means of the graded buffering design, load self-adaptive elastic supporting is achieved, the daily use comfort is guaranteed, meanwhile, the protection capacity under high-strength impact is enhanced, and the buffering performance, safety and adaptability to different exercise intensities of the sports floor are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of sports field facilities technology, and more specifically to a buffer keel structure, modular floor unit, and quick-assembly sports floor system. Background Technology

[0002] As a critical infrastructure element in sports venues, training centers, and fitness facilities, the performance of sports flooring directly impacts athlete safety, athletic performance, and facility durability. Traditional sports flooring is primarily divided into two categories: fixed installation (such as wooden joist fixed flooring) and modular interlocking flooring. Modular interlocking flooring, in particular, has gained widespread use due to its advantages such as ease of transportation, rapid deployment, and convenient partial replacement and maintenance.

[0003] However, existing modular sports flooring systems still have several shortcomings that urgently need to be addressed:

[0004] 1. Low installation efficiency and high professional requirements: Most interlocking flooring on the market currently relies on bolts, interlocking clips, or simple plug-in structures for connecting modules. Installation often requires multiple steps such as drilling, tightening, and hammering, making the process cumbersome and time-consuming. This not only requires installation personnel to have certain experience and skills but also often requires the use of specialized tools, resulting in high site laying costs and long cycles, making it difficult to meet the flexibility requirements of temporary event changes or rapid site setup.

[0005] 2. Insufficient connection reliability and poor long-term stability: Existing connection methods are prone to loosening, abnormal noise, or even detachment when subjected to frequent impacts, vibrations, and temperature and humidity changes over long periods of time in sports flooring. Simple plug-in structures have weak pull-out resistance, while bolted connections may creep and loosen under repeated loads. Instability at connection points directly poses safety hazards such as slips and sprains for athletes, and also affects the overall flatness and service life of the flooring.

[0006] 3. Limited Cushioning and Rebound Performance, Facing Diverse Needs: Existing products often employ a rather crude cushioning design. Their elastic layers typically use homogeneous materials or single-structure pads, providing fixed cushioning performance and elastic modulus. This results in the same flooring failing to simultaneously meet the diverse performance requirements of different sports (e.g., basketball's cushioning requirements versus badminton's rebound requirements), different user levels (professional athletes versus general fitness enthusiasts), or different competition standards. A lack of adjustable cushioning systems either fails to provide sufficient protection for high-intensity sports or is too soft, negatively impacting athletic performance and energy return.

[0007] In summary, existing modular sports flooring technologies have significant shortcomings in three core dimensions: ease of installation, connection stability, and performance adjustability. Therefore, there is an urgent need for an innovative, systematic solution that integrates rapid, tool-free installation, ensures absolutely reliable connections under long-term high loads, and provides flexible and adjustable cushioning and elasticity, thereby truly achieving high-standard adaptability across all scenarios, from mass fitness to professional competition. Summary of the Invention

[0008] In view of this, the present invention provides a buffer keel structure, modular floor unit, and quick-assembly sports floor system, aiming to solve the above-mentioned technical problems.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: A buffer keel structure, comprising: A composite keel, which consists of a skeleton structure and an elastic buffer structure; Multiple elastic pads are fixed to the bottom surface of the composite keel. The side of the elastic pad away from the composite keel forms a buffer support surface. The buffer support surface has a first buffer and a second buffer with a height difference. Under normal load conditions, the first buffer with the higher height bears the load alone and provides a primary buffering effect. When the load exceeds a preset threshold, the first buffer is compressed to be flush with the support surface of the second buffer, and the two together bear the load and provide a secondary buffering effect.

[0010] Through the above technical solution, the present invention achieves a load-adaptive hierarchical buffering function by setting a first buffer and a second buffer with different heights: under normal load, the higher first buffer provides a single level of buffering to ensure elasticity and comfort in daily use; when the load exceeds the threshold, the first buffer is compressed to be flush with the second buffer, and the two together bear the load, providing a secondary level of buffering to enhance support and protection, thereby effectively improving the cushioning performance, safety and adaptability to different sports intensities of the sports floor.

[0011] Preferably, in the above-mentioned buffer keel structure, the elastic pad includes a connecting pad plate, the bottom surface of the connecting pad plate has a first buffer protrusion at its center, and the bottom surface of the connecting pad plate has a plurality of second buffer protrusions surrounding the first buffer protrusion. The first buffer protrusion forms the first buffer zone, and the plurality of second buffer protrusions form the second buffer zone.

[0012] Preferably, the above-mentioned buffer keel structure further includes two keel end fixing members, which are respectively fixedly connected to both ends of the composite keel to satisfy the end locking of the composite keel.

[0013] Preferably, in the above-mentioned buffer keel structure, the composite keel consists of an upper keel, a lower keel, and a keel intermediate pad that clamps and fixes the upper keel and the lower keel.

[0014] Preferably, in the above-mentioned buffer keel structure, the composite keel includes a keel body, the interior of which has an embedded slot that extends through both ends, and a gasket layer is provided in the embedded slot.

[0015] The present invention also provides a modular floor unit, including multiple parallel and spaced buffer keel structures, and floor bodies fixed to the top surfaces of the multiple buffer keel structures; the number of floor bodies is multiple, and they are spliced ​​together to form a floor panel, the bottom surface of the floor body is fixed to the top surface of the composite keel of the buffer keel structure; the ends of the composite keel are connected to locking connectors.

[0016] Through the above technical solution, the modular floor unit provided by the present invention is constructed based on a buffer keel structure. Through modular design and pre-set locking interfaces, it significantly improves the assembly efficiency and standardization of the floor, realizes rapid deployment and partial replacement, facilitates transportation, warehousing and subsequent maintenance, and enhances the practicality and economy of the entire floor system.

[0017] The present invention also provides a rapid assembly sports flooring system, which is composed of multiple modular flooring units. Adjacent modular flooring units are connected by locking connectors, which include a hinge locking structure and a hook locking structure. The hinge locking structure and the hook locking structure together realize the positioning and fastening between adjacent modular flooring units.

[0018] Through the above technical solution, the rapid assembly sports floor system provided by the present invention adopts a dual connection method combining hinge locking and hook locking, which ensures a firm and reliable connection while achieving precise positioning. The system supports tool-free or simple tool operation, which greatly reduces the installation threshold and time cost, and is suitable for multi-scenario, high-efficiency site construction and adjustment needs.

[0019] Preferably, in the above-mentioned rapid assembly sports floor system, the hinge locking structure is a pin-type hinge structure and / or a universal joint type hinge structure.

[0020] Preferably, in the above-mentioned rapid assembly sports flooring system, the hook locking structure includes: a fixed hook and a movable hook respectively connected to the keel end fixing member of two adjacent modular flooring units, wherein the fixed hook and the movable hook are engaged and locked.

[0021] Preferably, in the above-mentioned rapid assembly sports flooring system, the movable hook includes: a fixed bracket, a handle, an adjusting component, and an adjusting screw; the fixed bracket is fixed to the side wall of the keel end fixing component, one end of the handle is hinged to the fixed bracket, the adjusting component is located inside the handle and is hinged to the handle via a pivot, a locking nut is fixed inside the adjusting component, the adjusting screw passes through the adjusting component and is threadedly connected to the locking nut, a spring is sleeved on the adjusting screw, the spring presses against the locking nut and the end of the adjusting component away from the locking nut, and the end of the adjusting screw has a hook for engaging with the fixed hook.

[0022] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a buffer keel structure, modular floor unit, and rapid assembly sports floor system, which has the following beneficial effects: 1. Graded cushioning and high adaptability: Through the first and second buffers with different heights on the elastic pad, a two-stage cushioning system that adapts to the load is achieved, which takes into account both the comfort of daily use and the protection under high-intensity impact, thereby improving sports performance and safety.

[0023] 2. Stable structure and high durability: The composite keel is composed of a skeleton and an elastic structure, combined with end fasteners and a variety of locking structures to ensure overall rigidity, impact resistance and stability under long-term use, and reduce loosening and abnormal noise.

[0024] 3. Modular design and rapid assembly: The modular floor units and the hinge + hook double locking structure enable rapid assembly and disassembly without tools or with simple tools, greatly improving installation efficiency and reducing construction threshold and cost.

[0025] 4. Reliable connection and self-locking function: The hook locking structure has an eccentric self-locking mechanism and length adjustment function, ensuring a tight connection, strong resistance to pull-out force, and adaptability to thermal expansion and contraction and dynamic loads, thereby improving system safety and durability.

[0026] 5. Adaptable to multiple scenarios and easy maintenance: The modular design facilitates partial replacement, transportation, and warehousing, and flexibly adapts to different venues, sports, and usage levels, enhancing the system's practicality and economy. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1The attached figure is a schematic diagram of the overall structure of the buffer keel structure of Embodiment 1 provided by the present invention; Figure 2 The attached figure is an exploded structural diagram of the buffer keel structure of Embodiment 1 provided by the present invention; Figure 3 The attached figure is a structural schematic diagram of the keel end fixing component of Embodiment 1 provided by the present invention; Figure 4 The attached figure is a schematic diagram of the structure of the elastic pad according to Embodiment 1 of the present invention; Figure 5 The attached figure is a cross-sectional view of the elastic pad of Embodiment 1 provided by the present invention; Figure 6 The attached figure is a schematic diagram of the overall structure of the buffer keel structure of Embodiment 2 provided by the present invention; Figure 7 The attached figure is an exploded structural diagram of the buffer keel structure of Embodiment 2 provided by the present invention; Figure 8 The attached figure is a front structural schematic diagram of the modular floor unit of Embodiment 3 provided by the present invention; Figure 9 The attached figure is a schematic diagram of the rear structure of the modular floor unit according to Embodiment 3 of the present invention; Figure 10 The attached figure is a front structural schematic diagram of the rapid assembly sports floor system of Embodiment 4 provided by the present invention; Figure 11 The attached figure is a schematic diagram of the rear structure of the rapid assembly sports flooring system according to Embodiment 4 of the present invention; Figure 12 The attached figure shows Embodiment 4 provided by the present invention. Figure 11 A magnified view of part A in the image; Figure 13 The attached figure shows Embodiment 4 provided by the present invention. Figure 11 A magnified view of part B in the image; Figure 14 The attached figure shows Embodiment 4 provided by the present invention. Figure 11 A magnified view of a portion of C in the image; Figure 15 The attached figure is an exploded view of the hinged locking structure of Embodiment 4 provided by the present invention; Figure 16 The attached figure is an exploded view of the hook locking structure of Embodiment 4 provided by the present invention; Figure 17 The attached figure is a schematic diagram of the hinged locking structure of Embodiment 5 provided by the present invention.

[0029] in: 1-Keel section; 11-Upper keel; 12-Lower keel; 13-Keel intermediate gasket; 14-Keel body; 141-Embedded slot; 15-Gasket layer; 2-Keel end fastener; 21-Side plate; 22-Intermediate plate; 23-Slot bottom plate; 24-Second fixing screw; 25-Third fixing screw; 26-Threaded connection hole; 3-Elastic pad; 31-Connecting pad; 32-First buffer protrusion; 321-Stepped connecting hole; 33-Second buffer protrusion; 34-First fixing screw; 35-Rigid support washer; 351-Screw clearance hole; 36-Connecting rib; 4-Floor body; 5-Locking connector; 51-Fourth fixing screw; 52-First connecting shaft plate; 521-Pin; 53-Second connecting shaft plate; 531-Pin hole; 54-Fixed hook; 55-Modible hook; 551-Fixed bracket; 552-Handle; 553-Adjusting component; 554-Adjusting screw; 555-Locking nut; 556-Spring; 557-Hook; 56-Universal ball seat; 57-Universal ball head. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: See appendix Figure 1 and attached Figure 2 This invention discloses a buffer keel structure, comprising: Composite keel 1, which consists of a skeleton structure and an elastic buffer structure; Multiple elastic pads 3 are fixed to the bottom surface of the composite keel 1. The side of the elastic pad 3 away from the composite keel 1 forms a buffer support surface. The buffer support surface has a first buffer zone and a second buffer zone with a height difference. Under normal load conditions, the first buffer zone, which has a higher height, bears the load alone and provides primary buffering. When the load exceeds a preset threshold, the first buffer zone is compressed to be flush with the support surface of the second buffer zone, and the two buffer zones jointly bear the load and provide secondary buffering.

[0032] In this embodiment, the composite keel 1 consists of an upper keel 11, a lower keel 12, and a keel intermediate spacer 13 that clamps and fixes between the upper keel 11 and the lower keel 12.

[0033] To further optimize the above technical solution, it also includes two keel end fixing parts 2, which are fixedly connected to both ends of the composite keel 1 respectively, so as to satisfy the end locking of the composite keel 1.

[0034] See appendix Figure 4 The elastic pad 3 includes a connecting pad 31. The bottom surface of the connecting pad 31 has a first buffer protrusion 32 at its center. The bottom surface of the connecting pad 31 has a plurality of second buffer protrusions 33 surrounding the first buffer protrusion 32. The first buffer protrusion 32 forms a first buffer zone, and the plurality of second buffer protrusions 33 form a second buffer zone.

[0035] To further optimize the above technical solution, the first buffer protrusion 32 is provided with a through stepped connection hole 321, and the first fixing screw 34 passes through the stepped connection hole 321 and is fastened to the lower keel 12, so that the connecting pad 31 and the lower keel 12 fit tightly together.

[0036] See appendix Figure 5 The connecting plate 31 has a rigid support washer 35 embedded inside. The rigid support washer 35 has a screw clearance hole 351 to avoid the stepped connecting hole 321. The rigid support washer 35 enhances its fixing effect and reduces the risk of displacement. See appendix Figure 2 and attached Figure 3 The keel end fixing component 2 includes a U-shaped plate structure composed of two side plates 21 and a middle plate 22. A groove bottom plate 23 is fixed to one side of the two side plates 21. The groove bottom plate 23 is fixedly connected to the middle plate 22. The groove bottom plate 23, the two side plates 21 and the middle plate 22 enclose an embedded groove to accommodate the upper keel 11 and the lower keel 12. Both side plates 21 are fixedly connected to the two sides of the upper keel 11 and the lower keel 12 by the second fixing screw 24. The groove bottom plate 23 is fixedly connected to the lower keel 12 by the third fixing screw 25.

[0037] In this embodiment, both the first buffer protrusion 32 and the second buffer protrusion 33 are cylindrical structures. To further optimize, the outer diameter of the first buffer protrusion 32 and the second buffer protrusion 33 gradually decreases from one end near the connecting pad 31 to the other end, and both ends form arc-shaped surfaces.

[0038] In one embodiment, the second buffer protrusion 33 may be a cylindrical array with a diameter of 25 mm and a height of 18 mm, and the first buffer protrusion 32 may be a continuous platform with a height of 2 mm, together forming a two-stage buffer mechanism.

[0039] In this embodiment, there are four second buffer protrusions 33, and the rigid support pad 35 forms a cross-shaped structure with a disk in the middle.

[0040] To improve the overall structural reliability, the sidewall of each second buffer protrusion 33 is connected to the sidewall of the first buffer protrusion 32 by a connecting rib 36, and the connecting rib 36 is fixedly connected to the connecting pad 31.

[0041] To reduce costs, the second buffer protrusion 32 is a hollow structure. Due to the opening of the stepped connecting hole 321, the first buffer protrusion 32 is also a hollow structure, which can meet the buffering requirements while reducing the amount of material used.

[0042] In this embodiment, the entire structure of the elastic pad 3 is made of rubber, and the rigid support pad 35 is made of iron.

[0043] In this embodiment, the elastic pad 3 can be adjusted and fixed in position as needed, as shown in the attached figure. Figure 1 As shown, the lower keel is arranged at equal intervals at both ends and between.

[0044] In this embodiment, there are multiple intermediate spacers 13 for the keel, and their fixed positions can be adjusted as needed, as shown in the attached figure. Figure 1 As shown, the upper keel 11 and the lower keel 12 are arranged at equal intervals at both ends and between them, and the keel middle gasket 13 is fixedly connected to the upper keel 11 and the lower keel 12 by adhesive bonding and / or nailing.

[0045] In this embodiment, the keel end fixing part 2 is made of stainless steel precision casting mold, and the bottom is enhanced by the semi-enclosed structure formed by the groove bottom plate 23 to enhance the mechanical strength of the part.

[0046] The elastic pad design in this embodiment is a key component of the sports flooring system. When a ball or athlete impacts the floor, it provides cushioning, reducing the impact load on the knee joint when the athlete lands, thereby more effectively protecting the athlete's health.

[0047] Example 2: See appendix Figure 6 and attached Figure 7 The difference between this embodiment and embodiment 1 lies in the structure of the composite keel 1. In this embodiment, the composite keel 1 includes a keel body 14. The keel body 14 has an embedded slot 141 that passes through both ends of it. A gasket layer 15 is provided in the embedded slot 141.

[0048] The difference between this embodiment and Embodiment 1 is that this embodiment uses a single keel with an embedded gasket, while Embodiment 1 has a double keel structure.

[0049] The number of gasket layers 15 can be set according to requirements; in this embodiment, two layers are used.

[0050] The other structures in this embodiment are the same as in Embodiment 1, and will not be described again here.

[0051] Example 3: See appendix Figure 8 and attached Figure 9 This invention discloses a modular floor unit, including multiple buffer keel structures of embodiment 1 or embodiment 2, and a floor body 4 fixed to the top surface of the multiple buffer keel structures; the number of floor bodies 4 is multiple pieces, which are spliced ​​together to form a floor surface, and the bottom surface of the floor body 4 is fixed to the top surface of the composite keel 1 of the buffer keel structure; the side wall of the keel end fixing member 2 is provided with a threaded connection hole 26, and the threaded connection hole 26 is connected to the locking connector 5 by a fourth fixing screw 51.

[0052] In this embodiment, the floor body 4 is fixedly connected to the upper joist 11 by adhesive bonding and / or nailing.

[0053] Example 4: See appendix Figure 10 To be continued Figure 14 This invention discloses a rapid assembly sports flooring system, which is composed of multiple modular flooring units as described in Embodiment 3. Adjacent modular flooring units are connected by locking connectors 5. The locking connectors 5 include a hinge locking structure and a hook locking structure. The hinge locking structure and the hook locking structure together realize the positioning and fastening between adjacent modular flooring units.

[0054] See appendix Figure 11 and attached Figure 15 The hinged locking structure includes a first connecting shaft plate 52 and a second connecting shaft plate 53 respectively connected to the keel end fixing parts 2 of two adjacent modular floor units, and the pin 521 on the first connecting shaft plate 52 is connected to the pin hole 531 on the second connecting shaft plate 53.

[0055] See appendix Figure 13 and attached Figure 14 The hook locking structure includes a fixed hook 54 and a movable hook 55 respectively connected to the keel end fixing parts 2 of two adjacent modular floor units, and the fixed hook 54 and the movable hook 55 are hooked and locked.

[0056] See appendix Figure 16The movable hook 55 includes: a fixed bracket 551, a handle 552, an adjusting member 553, and an adjusting screw 554; the fixed bracket 551 is fixed to the side wall of the keel end fixing member 2, one end of the handle 552 is hinged to the fixed bracket 551, the adjusting member 553 is located inside the handle 552 and is hinged to the handle 552 through a pivot, a locking nut 555 is fixed inside the adjusting member 553, the adjusting screw 554 passes through the adjusting member 553 and is threadedly connected to the locking nut 555, a spring 556 is sleeved on the adjusting screw 554, the spring 556 is pressed against the locking nut 555 and the end of the adjusting member 553 away from the locking nut 555, and the end of the adjusting screw 554 has a hook ring 557 for engaging with the fixed hook 54.

[0057] In this embodiment, the locking connector is a key connector for the rapid assembly of sports flooring. Its main function is to quickly hook together each small component of the sports flooring using a snap-fit ​​connection, thereby achieving the goal of rapid assembly. This connector design not only improves assembly efficiency but also ensures the stability and durability of the flooring.

[0058] In this embodiment, the eccentric fulcrum of the fixed bracket 551 ensures that when the handle 552 is pressed down, the fulcrum of the handle 552 moves downward to press and lock, and self-locking is achieved using the dead point position. The length of the adjusting screw 554 is designed to be adjustable to meet different length requirements. Its tail uses a nut locking design, and the length can be easily adjusted by simply rotating the hook 557 without the need for other tools or special tools. The tail design uses a spring or elastic material to achieve a flexible connection of the hook, thereby enhancing the elasticity between the plates.

[0059] The rapid assembly method uses a T-shaped arrangement of long and short planks. The planks are first connected using a hinged locking mechanism, and then secured with hooks. By assembling the planks one by one in this way, a large sports floor can be formed, as shown in the attached diagram. Figure 10 and attached Figure 11 As shown.

[0060] The method of using the hook locking structure in this embodiment is as follows: Hook: Pull up the adjusting screw 554 and hook 557 so that they are hooked into the fixed hook 54 of the adjacent plate.

[0061] Locking: Press down on the operating end of the handle 552 by hand. Due to the action of the eccentric fulcrum fixing bracket 551, the hook 557 will generate a strong backward locking force.

[0062] Self-locking: When the handle 552 is pressed to a near-horizontal position, the mechanism will cross the dead point and achieve mechanical self-locking. At this time, even if the hand is released, the locking buckle will not automatically pop open.

[0063] Adjustment: If there is a gap in the connection, the hook can be opened and the hook ring 557 can be manually rotated to adjust its effective length until the best locking effect is achieved.

[0064] The overall assembly method for the floor panels in this embodiment is as follows: Assembly Process: For the first row of installation, move the modular floor unit long planks to the designated positions. Lift one end of the plank with the second connecting shaft plate 53 and insert it onto the pin 521 of the other plank with the first connecting shaft plate 52. Lift the end of the plank with the hook locking structure and engage the hook 557 with the fixing hook 54. Then, press down firmly on the operating end of the handle 552 until it reaches the self-locking position, ideally with a click. At this point, the two planks are securely connected.

[0065] Repeat and Expand: Repeat the above steps, starting with long plank components for the first row, then using short planks for the first component, followed by long planks for the next, and ending with short planks. The third row uses long components, and so on, forming a T-shaped assembly structure. By continuously expanding this pattern, efficient assembly of large-area sports fields can be achieved. See the appendix for the final assembly result. Figure 10 and attached Figure 11 As shown.

[0066] Example 5: See appendix Figure 17 The difference between this embodiment and embodiment 4 lies in the hinge locking structure. In this embodiment, the hinge locking structure includes: a universal ball seat 56 and a universal ball head 57 respectively connected to the keel end fixing member 2 of two adjacent modular floor units. The universal ball head 57 is inserted into the universal ball seat 56 to realize the rotation of the universal head.

[0067] This embodiment adopts a spherical joint structure, which enables multi-directional free rotation through spherical contact, effectively solving the stress concentration problem of the floor on uneven ground; it also solves the coordinated deformation requirements of longitudinal expansion and contraction and lateral displacement of the floor, ensuring that the floor system always maintains structural stability and smooth joints under thermal expansion and contraction and dynamic loads.

[0068] The installation method in this embodiment is the same as that in embodiment 4, and will not be described again.

[0069] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0070] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A buffer keel structure, characterized in that, include: Composite keel (1), wherein the composite keel (1) is composed of a skeleton structure and an elastic buffer structure; Elastic pads (3), there are multiple elastic pads (3) and they are fixed to the bottom surface of the composite keel (1). The side of the elastic pads (3) away from the composite keel (1) forms a buffer support surface. The buffer support surface has a first buffer and a second buffer that form a height difference. Under normal load conditions, the first buffer with the higher height bears the load alone and provides a first-level buffer effect. When the load exceeds a preset threshold, the first buffer is compressed to be flush with the support surface of the second buffer, and the two together bear the load and provide a secondary buffering effect.

2. The buffer keel structure according to claim 1, characterized in that, The elastic pad (3) includes a connecting pad (31), the bottom surface of which has a first buffer protrusion (32) at its center, and the bottom surface of which has a plurality of second buffer protrusions (33) surrounding the first buffer protrusion (32). The first buffer protrusion (32) forms the first buffer zone, and the plurality of second buffer protrusions (33) form the second buffer zone.

3. The buffer keel structure according to claim 1, characterized in that, It also includes two keel end fixing parts (2), which are fixedly connected to both ends of the composite keel (1) to satisfy the end locking of the composite keel (1).

4. A buffer keel structure according to any one of claims 1-3, characterized in that, The composite keel (1) consists of an upper keel (11), a lower keel (12), and a keel intermediate pad (13) that clamps and fixes the upper keel (11) and the lower keel (12) between them.

5. A buffer keel structure according to any one of claims 1-3, characterized in that, The composite keel (1) includes a keel body (14), and the keel body (14) has an embedded slot (141) that passes through both ends of it. A gasket layer (15) is provided in the embedded slot (141).

6. A modular floor unit, characterized in that, The buffer keel structure includes multiple parallel and spaced-apart keels as described in any one of claims 1-5, and further includes a floor body (4) fixed to the top surface of the multiple buffer keel structures; the number of floor bodies (4) is multiple pieces, which are spliced ​​together to form a floor panel, and the bottom surface of the floor body (4) is fixed to the top surface of the composite keel (1) of the buffer keel structure; the end of the composite keel (1) is connected to a locking connector (5).

7. A rapid assembly sports flooring system, characterized in that, It is assembled from multiple modular floor units as described in claim 6. Adjacent modular floor units are connected by the locking connector (5). The locking connector (5) includes a hinge locking structure and a hook locking structure. The hinge locking structure and the hook locking structure together realize the positioning and fastening between adjacent modular floor units.

8. A rapid assembly sports flooring system according to claim 7, characterized in that, The hinge locking structure is a pin-type hinge structure and / or a universal joint type hinge structure.

9. A rapid assembly sports flooring system according to claim 7, characterized in that, The hook locking structure includes a fixed hook (54) and a movable hook (55) respectively connected to the keel end fixing member (2) of two adjacent modular floor units, wherein the fixed hook (54) and the movable hook (55) are hooked and locked.

10. A rapid assembly sports flooring system according to claim 9, characterized in that, The movable hook (55) includes: a fixed bracket (551), a handle (552), an adjusting component (553), and an adjusting screw (554); the fixed bracket (551) is fixed to the side wall of the keel end fixing component (2), one end of the handle (552) is hinged to the fixed bracket (551), the adjusting component (553) is located inside the handle (552) and is hinged to the handle (552) through a pivot, and a lock is fixed inside the adjusting component (553). A locking nut (555) is tightened, and an adjusting screw (554) passes through the adjusting member (553) and is threadedly connected to the locking nut (555). A spring (556) is fitted on the adjusting screw (554), and the spring (556) presses against the locking nut (555) and the adjusting member (553) at the end away from the locking nut (555). The end of the adjusting screw (554) has a hook (557) for engaging with the fixed hook (54).

Images