A double-plate body mortise and tenon connection structure and connection method

Abstract

The present application belongs to the field of plate body connection, and particularly relates to a double-plate body mortise and tenon connection structure and a connection method. The double-plate body mortise and tenon connection structure comprises a locking mechanism and a matching mechanism. The locking mechanism comprises a lock box fixed to a first plate body and a fastening lock movably arranged in the lock box. The fastening lock comprises an integral horizontal part and a vertical part. The bottom of the connection part of the horizontal part and the vertical part is provided with a stepped clamping fold. The fastening lock is connected with a horizontal elastic member for providing horizontal elastic force. The matching mechanism comprises a lock catch box fixed to a second plate body. The lock catch box is provided with a vertical slot extending in the vertical direction. One side wall of the vertical slot is provided with a vertical opening. The lower end of the opening is hingedly connected with a rotatable movable door through a rotating shaft. The movable door is provided with an elastic reset member. The double-plate body mortise and tenon connection structure can automatically align, mechanically lock and has a two-plate body connection structure with multiple limiting functions, and is suitable for various plate body scenes requiring reliable and efficient assembly.

Description

Technical Field

[0001] This invention belongs to the field of plate connection, specifically relating to a double-plate tenon and mortise connection structure and connection method. Background Technology

[0002] In various engineering structures, reliable connections between plates are crucial to overall performance. Taking common prefabricated structures as an example, adjacent plates are typically joined by end shape matching, contact friction, or simple limiting devices. While this method may meet requirements when only vertical loads are applied, it often exhibits problems such as insufficient connection stiffness and discontinuous force transmission paths when subjected to horizontal forces, bending moments, or vibration loads. This can easily lead to slippage, separation, or rotation at the joints, affecting the overall stability and load-bearing capacity of the structure.

[0003] Furthermore, these connection methods are typically highly dependent on the precision and operation of on-site construction, often requiring manual assistance for positioning, temporary fixing, or even secondary reinforcement. This not only results in low efficiency but also makes it difficult to guarantee consistent connection quality. At the same time, existing connection structures generally lack intuitive and quantifiable criteria for judging whether the assembly is in place, with assembly quality largely relying on experience-based judgment, introducing uncertainty into project acceptance and long-term use.

[0004] Therefore, it is necessary to provide a plate connection structure that is reliable, easy to construct, has automatic alignment and locking functions, and whose assembly status can be intuitively determined, in order to meet the application scenarios with higher requirements for connection performance and construction efficiency. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a double-plate mortise and tenon joint structure and connection method. This double-plate joint structure, capable of automatic alignment, mechanical locking, and multiple limiting functions, is suitable for various plate assembly scenarios requiring reliable and efficient assembly.

[0006] This invention provides a double-plate tenon-and-mortise connection structure, including a locking mechanism and a mating mechanism respectively disposed on a first plate and a second plate;

[0007] The locking mechanism includes a lock box fixed to the first plate and a fastening lock that can be moved horizontally inside the lock box. The fastening lock includes a horizontal part and a vertical part that are integrally connected. The bottom of the connection between the horizontal part and the vertical part is provided with a stepped locking pleat. The fastening lock is connected to a horizontal elastic member that provides horizontal elastic force.

[0008] The mating mechanism includes a locking box fixed to the second plate. The locking box has a vertical groove extending vertically inside. One side wall of the vertical groove has a vertical opening. There is a gap between the upper end of the opening and the top of the vertical groove, and between the lower end of the opening and the bottom of the vertical groove.

[0009] The lower end of the opening is hinged to a rotatable movable door via a pivot, and the movable door is equipped with a spring-loaded reset component;

[0010] When the first plate and the second plate are initially assembled, the fastening lock moves horizontally under the elastic force of the horizontal elastic element, and the vertical part passes through the opening to push open the movable door and enter the vertical groove.

[0011] When the first plate and the second plate continue to move relative to each other until they are fully aligned, the top of the vertical part rises to the gap between the upper end of the opening and the top of the vertical groove. The movable door is reset under the action of the elastic reset member, and its free end abuts against the stepped locking folds, realizing the horizontal and vertical bidirectional locking of the locking mechanism and the cooperating mechanism.

[0012] Furthermore, a horizontal guide rail is provided inside the lock box, and the horizontal part of the fastening lock is slidably mounted on the horizontal guide rail.

[0013] Furthermore, a guide rounded corner is provided at the corner where the horizontal and vertical parts connect, which is used to push open the movable door when the vertical part passes through the opening laterally.

[0014] Furthermore, the top of the vertical part is provided with a rounded corner on the side near the horizontal part to guide the top of the vertical part into the gap area between the upper end of the opening and the top of the vertical groove.

[0015] Furthermore, the fastening lock also includes a support plate that is fixedly connected to the horizontal part and slidably disposed in the lock box; the horizontal elastic element is a horizontal compression spring, one end of which abuts against the side of the support plate away from the horizontal part, and the other end abuts against the inner wall of the lock box.

[0016] Furthermore, the elastic reset component is a reset spring, with one end of the reset spring fixed to the bottom of the vertical groove and the other end abutting against the side of the movable door away from the locking mechanism.

[0017] Furthermore, the preload of the horizontal compression spring is greater than the preload of the return spring.

[0018] Furthermore, on the side where the first plate and the second plate are joined together, at least two sets of locking mechanisms and cooperating mechanisms are arranged at intervals in the vertical direction; the positions of each set of locking mechanisms and cooperating mechanisms correspond one-to-one in the vertical direction and are staggered in the horizontal direction.

[0019] Furthermore, the sides of the first and second panels that are joined together are provided with matching tenons and mortises, so that the first and second panels can be fitted together longitudinally.

[0020] The present invention also provides a connection method based on the above-mentioned double-plate tenon-and-mortise connection structure, comprising the following steps:

[0021] The first plate with the locking mechanism and the second plate with the mating mechanism are initially assembled so that the locking mechanism and the mating mechanism are aligned in the horizontal direction.

[0022] Under the elastic force of the horizontal elastic element, the horizontal part of the fastening lock drives the vertical part to move horizontally, so that the vertical part passes through the opening and pushes open the movable door, and enters the vertical groove.

[0023] Continue to move the first and second plates relative to each other along the splicing direction until they are completely aligned.

[0024] During the continued relative movement, the top of the vertical part moves upward along the inner wall of the vertical groove and eventually embeds into the gap area between the upper end of the opening and the top of the vertical groove.

[0025] When the first plate and the second plate are fully aligned, the movable door is reset under the action of the elastic reset member, and its free end abuts against and is locked onto the stepped locking folds, thus completing the horizontal and vertical bidirectional locking of the locking mechanism and the cooperating mechanism.

[0026] The beneficial effects of this invention are that the double-plate tenon-and-mortise connection structure realizes the two plates in both horizontal and vertical mechanical locking; this design makes the assembly process highly automated and the connection reliable, and forms an omnidirectional constraint after locking, which significantly improves the construction efficiency, overall rigidity and long-term service stability of the connection between the plates. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the first plate in this invention;

[0028] Figure 2 This is a schematic diagram of the structure of the second plate in this invention;

[0029] Figure 3 This is a schematic diagram of the lock box structure in this invention;

[0030] Figure 4 This is a cross-sectional view of the lock box in this invention;

[0031] Figure 5 This is a schematic diagram of the locking box in this invention;

[0032] Figure 6 This is a cross-sectional view of the locking box in this invention;

[0033] Figure 7 This is a schematic diagram of the fastening lock in this invention;

[0034] Figure 8 This is a schematic diagram of the movable door structure in this invention;

[0035] Figure 9 This is a schematic diagram of the initial state of splicing the first plate and the second plate in this invention;

[0036] Figure 10 This is a schematic diagram of the locking mechanism and the mating mechanism when the first plate and the second plate are initially assembled in the present invention.

[0037] Figure 11 This is a schematic diagram of the locking mechanism and the mating mechanism when the first plate and the second plate are initially assembled in this invention;

[0038] Figure 12 This is a schematic diagram of the locking mechanism and the mating mechanism when the first plate and the second plate are fully aligned in this invention.

[0039] In the diagram, 1-first plate; 11-tenon; 2-second plate; 21-mortise; 3-locking mechanism; 31-lock box; 311-horizontal guide rail; 32-fastening lock; 321-horizontal part; 3211-guide rounded corner; 322-vertical part; 3221-top rounded corner; 323-positioning pleat; 324-bearing plate; 325-horizontal compression spring; 4-fitting mechanism; 41-lock box; 411-vertical groove; 412-opening; 413-rotating shaft; 414-moving door; 415-reset spring; 5-opening. Detailed Implementation

[0040] 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 a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0045] like Figures 1-12 As shown, the present invention provides a double-plate tenon-and-mortise connection structure, including a locking mechanism 3 and a mating mechanism 4 respectively disposed on a first plate 1 and a second plate 2. The locking mechanism 3 includes a lock box 31 fixed to the first plate 1 and a fastening lock 32 disposed horizontally in the lock box 31. This structure makes the fastening lock 32 stable as a whole and can actively extend and retract. The fastening lock 32 includes a horizontal part 321 and a vertical part 322 integrally connected. The bottom of the connection between the horizontal part 321 and the vertical part 322 is provided with a stepped locking pleat 323. The fastening lock 32 is connected to a horizontal elastic member that provides horizontal elastic force. The horizontal elastic member is used to automatically push the fastening lock 32 to extend horizontally when the first plate 1 and the second plate 2 are assembled.

[0046] The cooperating mechanism 4 includes a latch box 41 fixed to the second plate 2, which serves as a fixed structure for receiving and accommodating the fastening lock 32. The latch box 41 has a vertically extending groove 411 inside, which provides vertical movement space and guidance for the vertical part 322. One side wall of the vertical groove 411 has a vertical opening 412, which allows the vertical part 322 to enter laterally and restricts its exit path. There are gaps between the upper end of the opening 412 and the top of the vertical groove 411, and between the lower end of the opening 412 and the bottom of the vertical groove 411. The gap between the upper end of the opening 412 and the top of the vertical groove 411 is used to accommodate the top of the vertical part 322, and the gap between the lower end of the opening 412 and the bottom of the vertical groove 411 is used to provide rotation space for the movable door 414 and the hinge structure.

[0047] The lower end of the opening 412 is hinged to a rotatable movable door 414 via a pivot 413 to enable one-way entry and reverse locking of the vertical section 322. The movable door 414 is equipped with a resilient reset member, which is used to push the movable door 414 to reset and achieve automatic locking after the fastening lock 32 is in place.

[0048] When the first plate 1 and the second plate 2 are initially assembled, the fastening lock 32 moves horizontally under the elastic force of the horizontal elastic member, realizing the self-propulsion of the fastening lock 32 without external force intervention. The vertical part 322 passes horizontally through the opening 412 to push open the movable door 414 and enter the vertical groove 411 to complete the horizontal insertion action.

[0049] When the first plate 1 and the second plate 2 continue to move relative to each other until they are fully aligned, the top of the vertical part 322 rises to the gap between the upper end of the opening 412 and the top of the vertical groove 411, thereby achieving the positioning and constraint of the vertical part 322 in the upward vertical direction and the horizontal directions on both sides. The movable door 414 is reset under the action of the elastic reset member, and its free end abuts against the stepped locking fold 323, thereby achieving the positioning and constraint of the vertical part 322 in the downward vertical direction and the horizontal directions on both sides, realizing the horizontal and vertical bidirectional locking of the locking mechanism 3 and the cooperating mechanism 4. In addition, after the lock box 31 and the latch box 41 are assembled, they fit together, and their side walls contact each other, further restricting the relative displacement of the first plate 1 and the second plate 2 in the plate surface direction, thereby achieving omnidirectional limiting.

[0050] The double-plate tenon-and-mortise connection structure provided by this invention, through the driving of horizontal elastic elements and elastic reset elements, and the mechanical design of the linkage between the locking fold 323 and the movable door 414, realizes automatic alignment, lateral insertion, vertical positioning, bidirectional locking and omnidirectional limiting during the assembly process of double plates. It significantly improves the reliability, construction efficiency and inspectability of the assembly connection (e.g., the "click" sound when the assembly is in place, the obvious change in the operating feel (such as locking after a sudden increase in resistance) or the matching of external alignment marks), and is suitable for dry connection scenarios of various prefabricated plate structures.

[0051] In addition, through the contact between the movable door 414 and the locking fold 323, the limiting of the top of the vertical part 322 and the upper end of the opening 412, and the side cooperation between the lock box 31 and the latch box 41, this structure forms a multi-limiting mechanism, which significantly improves the overall rigidity, stability and anti-displacement ability of the connection, and is suitable for dry connection scenarios with high requirements for assembly accuracy and stress performance.

[0052] In one embodiment, a transverse guide rail 311 is provided inside the lock box 31, and the horizontal portion 321 of the fastening lock 32 is slidably disposed on the transverse guide rail 311. In this embodiment, the transverse guide rail 311 provides precise guidance for the horizontal movement of the fastening lock 32, ensuring that it slides along a preset straight path, effectively preventing deflection or jamming during movement, thereby improving the smoothness and reliability of the extension and resetting action of the fastening lock 32 during assembly.

[0053] In one embodiment, a guide fillet 3211 is provided at the corner where the horizontal part 321 connects to the vertical part 322, for opening the movable door 414 when the vertical part 322 passes laterally through the opening 412. In this embodiment, the arc design of the guide fillet 3211 can smoothly convert the horizontal thrust into a torque that rotates the movable door 414 at the moment of contact, significantly reducing the frictional resistance and motion impact during the opening process. This not only makes the rotation of the movable door 414 smoother and more reliable, avoiding jamming, but also effectively reduces the wear on the contact surface of the movable door 414 and the corner of the vertical part 322 itself, improving the smoothness of the locking action and the service life of the entire connection structure.

[0054] In one embodiment, a top rounded corner 3221 is provided on the side of the vertical part 322 near the horizontal part 321 to guide the top of the vertical part 322 into the gap area between the upper end of the opening 412 and the top of the vertical groove 411. In this embodiment, the arc-shaped structure of the top rounded corner 3221 provides a smooth transition and guidance when the vertical part 322 moves upward and contacts the edge of the opening 412 or the top of the groove. This effectively converts the vertical movement into slight lateral sliding, thereby significantly reducing the insertion resistance, avoiding rigid impact or jamming, and ensuring that the vertical part 322 can smoothly and accurately enter the preset gap area. This improves the smoothness of the assembly process, the alignment accuracy, and the reliability of the overall locking.

[0055] In one embodiment, the fastening lock 32 further includes a support plate 324 fixedly connected to the horizontal portion 321 and slidably disposed within the lock box 31; the horizontal elastic element is a horizontal compression spring 325, one end of which abuts against the side of the support plate 324 opposite to the horizontal portion 321, and the other end abuts against the inner wall of the lock box 31. In this embodiment, the support plate 324 provides a stable and uniform force application plane for the horizontal compression spring 325, ensuring that the spring force can be efficiently transmitted in a straight line, thereby making the horizontal movement of the fastening lock 32 smoother and more controllable; this design not only makes the compression and release action of the horizontal compression spring 325 smoother and more reliable, but also effectively utilizes the internal space of the lock box 31, achieving a compact structure, while ensuring that the horizontal thrust can be continuously and stably applied to the fastening lock 32 during assembly, ensuring that it can reliably complete the extension and reset actions, and improving the consistency and synchronization of the entire locking process.

[0056] In one embodiment, the elastic reset element is a reset spring 415. One end of the reset spring 415 is fixed to the bottom of the vertical groove 411, and the other end abuts against the side of the movable door 414 away from the locking mechanism 3. In this embodiment, this structure provides the movable door 414 with a continuous and stable reset force, ensuring that it can automatically, quickly and reliably reset and lock onto the locking fold 323 after being pushed open by the vertical part 322, thereby realizing the automation of locking. The preload of the reset spring 415 can be precisely set as needed to balance the opening resistance and locking force of the movable door 414, optimizing the smoothness of the locking action and the reliability of the final locking. At the same time, this layout, which is directly connected to the bottom of the vertical groove 411, has a simple and compact structure, a clear force transmission path, effectively utilizes the internal space of the latch box 41, and avoids failure points caused by complex transmission, improving the durability and maintenance convenience of the entire mating mechanism 4.

[0057] In one embodiment, the preload of the horizontal compression spring 325 is greater than that of the return spring 415. This preload relationship ensures that during assembly, the horizontal compression spring 325 can provide sufficient initial thrust to overcome the resistance exerted by the return spring 415 through the movable door 414, thereby ensuring that the vertical part 322 of the fastening lock 32 can smoothly and reliably push the movable door 414 open and fully enter the vertical slot 411. This differentiated preload design optimizes the timing and mechanical coordination of the two springs, ensuring that the locking process strictly follows the preset action logic of "horizontal extension first, vertical positioning then, and finally, the movable door 414 reset and locks in place." This effectively avoids problems such as action interruption, jamming of the fastening lock 32, or incomplete locking that may be caused by spring force imbalance, greatly improving the reliability, continuity, and final locking stability of the entire self-locking process.

[0058] In one embodiment, the locking mechanism 3 and the mating mechanism 4 are detachably embedded in pre-set openings 5 ​​on the sides where the first plate 1 and the second plate 2 are joined together. In this embodiment, this detachable design greatly enhances the construction flexibility and post-construction maintenance convenience of the entire connection system. During installation, the pre-assembled locking mechanism 3 and mating mechanism 4 can be directly embedded into the standardized openings 5 ​​on the side of the plate, or quickly fixed and aligned using connectors such as pins and screws, eliminating the need for complex on-site welding or pouring operations. This significantly simplifies the construction process, improves assembly efficiency, and reduces the risk of damage to the precast plate structure itself. Simultaneously, this design allows for partial replacement or repair without damaging the main structure of the plate when individual connectors are damaged or require upgrades, effectively reducing the overall lifecycle maintenance cost and enhancing the adaptability and reusability of the connection structure in different engineering scenarios.

[0059] In one embodiment, at least two sets of locking mechanisms 3 and cooperating mechanisms 4 are arranged vertically at intervals on the side where the first plate 1 and the second plate 2 are joined together. The locking mechanisms 3 and cooperating mechanisms 4 are vertically aligned and horizontally staggered. In this embodiment, this multi-point, staggered layout disperses the connecting force to different heights and lateral positions on the sides of the first plate 1 and the second plate 2, significantly improving the force distribution on the joining surface, effectively avoiding stress concentration, and thus greatly enhancing the uniformity of the overall connection's load-bearing capacity and structural stability. The collaborative work of multiple mechanisms forms a spatial mesh constraint, which can more effectively resist loads and deformations from different directions, enhancing the overall stiffness and torsional resistance of the connection nodes under complex stress conditions. Simultaneously, this design also improves the fault tolerance and reliability of the assembly process; even if individual locking mechanisms 3 fail to fully engage, the remaining mechanisms can still provide effective temporary constraints, ensuring smooth construction and the overall integrity of the final connection.

[0060] In one embodiment, tenons 11 and mortises 21 are provided on the sides where the first plate 1 and the second plate 2 are joined together, allowing the first plate 1 and the second plate 2 to be assembled together longitudinally. In this embodiment, the tenon and mortise structure serves as a basic connection structure, providing precise geometric guidance and coarse positioning for the initial assembly of the plates, ensuring that the subsequent locking mechanism 3 and mating mechanism 4 can be quickly and accurately aligned. The tight fit between the tenons 11 and mortises 21 not only bears a portion of the temporary load during the construction phase and effectively distributes the lateral shear force during the assembly process, but also significantly enhances the integrity and deformation resistance of the joint surface. While leveraging the traditional advantages of tenon and mortise structures, such as direct load bearing and clear force transmission path, the mechanical locking mechanism 3 solves the problem of loosening and pull-out that may occur in traditional dry tenon and mortise connections under complex loads, thereby significantly improving the construction convenience, assembly accuracy, and long-term reliability and durability of the connection nodes.

[0061] A connection method for the above-mentioned double-plate tenon-and-mortise joint structure includes the following steps:

[0062] The first plate 1, which is equipped with the locking mechanism 3, and the second plate 2, which is equipped with the cooperating mechanism 4, are initially assembled so that the locking mechanism 3 and the cooperating mechanism 4 are aligned in the horizontal direction.

[0063] Under the elastic force of the horizontal elastic element, the horizontal part 321 of the fastening lock 32 drives the vertical part 322 to move horizontally, so that the vertical part 322 passes through the opening 412 and pushes open the movable door 414, and enters the vertical groove 411.

[0064] Continue to move the first plate 1 and the second plate 2 relative to each other along the splicing direction until they are completely aligned;

[0065] During the continued relative movement, the top of the vertical part 322 moves upward along the inner wall of the vertical groove 411 and eventually embeds into the gap area between the upper end of the opening 412 and the top of the vertical groove 411.

[0066] When the first plate 1 and the second plate 2 are fully aligned, the movable door 414 is reset under the action of the elastic reset member, and its free end abuts against and is locked onto the stepped locking fold 323, thus completing the horizontal and vertical bidirectional locking of the locking mechanism 3 and the cooperating mechanism 4.

[0067] This method achieves rapid, automated, and high-precision dry assembly of double-panel structures through a continuous process of coarse guidance, self-propulsion, vertical positioning, and automatic locking. The entire process flows smoothly, significantly reducing reliance on operator skills and on-site construction conditions, making it particularly suitable for large-scale, prefabricated construction scenarios. The resulting connection nodes possess excellent overall rigidity, deformation resistance, and long-term service stability, providing an efficient and reusable solution for reliable connections between panels in prefabricated structures.

[0068] The above is merely an embodiment and does not constitute any limitation on the present invention. Any person skilled in the art can make many possible variations, modifications, or alterations to the technical solutions of the present invention without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A mortise and tenon joint structure of a double-plate body, comprising a locking mechanism and a cooperating mechanism arranged on a first plate body and a second plate body respectively, characterized in that: the locking mechanism comprises a lock box fixed to the first plate body and a fastening lock movably arranged in the lock box, the fastening lock comprises an integral horizontal part and a vertical part, a stepped clamping fold is arranged at the bottom of the joint of the horizontal part and the vertical part, and the fastening lock is connected with a horizontal elastic member providing horizontal elastic force; the cooperating mechanism comprises a lock catch box fixed to the second plate body, a vertical slot extending in the vertical direction is arranged in the lock catch box, a vertical opening is arranged on one side wall of the vertical slot, and the upper end and the lower end of the opening are both spaced from the top and the bottom of the vertical slot; the lower end of the opening is hinged with a rotatable movable door through a rotating shaft, and the movable door is provided with an elastic reset member; when the first plate body and the second plate body are initially combined, the fastening lock moves horizontally under the elastic force of the horizontal elastic member, the vertical part passes through the opening transversely to push the movable door open and into the vertical slot; when the first plate body and the second plate body continue to move relatively until they are completely aligned, the top of the vertical part rises to the spacing area between the upper end of the opening and the top of the vertical slot, the movable door resets under the action of the elastic reset member, the free end of the movable door abuts on the stepped clamping fold, and the horizontal and vertical bidirectional locking of the locking mechanism and the cooperating mechanism is realized. A horizontal guide rail is arranged in the lock box, and the horizontal part of the fastening lock is slidingly arranged on the horizontal guide rail. A guide round corner is arranged at the joint of the horizontal part and the vertical part, for pushing the movable door open when the vertical part passes through the opening transversely. A top round corner is arranged on the side of the top of the vertical part close to the horizontal part, for guiding the top of the vertical part to embed in the spacing area between the upper end of the opening and the top of the vertical slot. The fastening lock further comprises a bearing plate fixedly connected with the horizontal part and slidingly arranged in the lock box in the transverse direction; the horizontal elastic member is a horizontal compression spring, one end of the horizontal compression spring abuts on the side of the bearing plate away from the horizontal part, and the other end abuts on the inner wall of the lock box. The elastic reset member is a reset spring, one end of the reset spring is fixed to the bottom of the vertical slot, and the other end abuts on the side of the movable door away from the locking mechanism.

2. The double panel mortise and tenon joint structure of claim 1, wherein, The pre-tightening force of the horizontal compression spring is greater than the pre-tightening force of the reset spring.

3. The double panel mortise and tenon joint structure of claim 1, wherein, On the side surface of the first plate body and the second plate body combined with each other, at least two groups of the locking mechanism and the cooperating mechanism are arranged in the vertical direction; the positions of each group of the locking mechanism and the cooperating mechanism in the vertical direction correspond to each other, and are staggered in the horizontal direction.

4. The double panel mortise and tenon joint structure of claim 1, wherein, A tenon and a mortise are arranged on the side surface of the first plate body and the second plate body combined with each other, so that the first plate body and the second plate body can be longitudinally embedded and assembled with each other.

5. The double panel mortise and tenon joint structure of claim 1, wherein, The method comprises the following steps:

6. The double panel mortise and tenon joint structure of claim 1, wherein, combining the first plate body provided with the locking mechanism and the second plate body provided with the cooperating mechanism initially, so that the locking mechanism and the cooperating mechanism are aligned in the horizontal direction; 7. The double panel mortise and tenon joint structure of claim 1, wherein under the elastic force of the horizontal elastic member, the horizontal part of the fastening lock drives the vertical part to move horizontally, so that the vertical part passes through the opening transversely and pushes the movable door open, and enters the vertical slot; 8. The double panel mortise and tenon joint structure of claim 1, wherein, continuing to move the first plate body and the second plate body relatively in the combining direction until they are completely aligned; 9. The double panel mortise and tenon joint structure of claim 1, wherein, ​ 10. A method of connecting based on the double plate body mortise and tenon connection structure according to any one of claims 1 to 9, characterized by, ​ ​ ​ ​ During the process of continuing relative movement, the top of the vertical part moves upward along the inner wall of the vertical groove and finally embeds into the interval region between the upper end of the opening and the top of the vertical groove; When the first plate body and the second plate body are completely aligned, the movable door is reset under the action of the elastic reset member, the free end of the movable door abuts against and is clamped on the stepped clamping fold, and the horizontal and vertical double locking of the locking mechanism and the matching mechanism is completed.

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