A multi-directional snap-fit ​​quick-connect light steel modular frame structure

Abstract

This invention is a multi-directional snap-fit ​​quick-connect light steel modular frame structure, including square tubes, steering fixing heads, and end connecting plates. The end connecting plate is inserted into the square tube and is vertically limited by a male-female snap-fit ​​structure; its elastic latch engages with the square tube's locking port to limit length. The steering fixing head has a connecting surface with a gourd-shaped hole. The head of the connecting bolt is inserted through the larger hole of the gourd-shaped hole and locked in the smaller hole. The bolt passes through the end connecting plate and is locked with a nut, achieving vertical or collinear connection between adjacent square tubes. The outer side of the square tube has a mounting groove for easy attachment and fixing of external equipment. This structure, through snap-fit ​​limiting and single-sided nut tightening, eliminates the need for internal operations or double-sided construction, improving assembly efficiency and avoiding welding heat deformation and plating damage.

Description

Technical Field

[0001] This invention relates to the field of display rack technology, specifically a multi-directional snap-fit ​​quick-connect light steel modular frame structure. Background Technology

[0002] Modular light steel frames are widely used in bus shelters, prefabricated display cabinets for exhibitions, information screen support structures, and lightweight house frames. These structures typically use square or rectangular steel pipes as the main frame, connected by welding, ordinary bolts, or angle brackets.

[0003] However, in practical applications and on-site construction, the above structure has the following defects: First, bolted connections usually require double-sided operation, while the internal space of closed-section components such as square steel is closed, making it impossible to place and tighten nuts inside, resulting in extremely inconvenient and inefficient construction; if welding is used, it is not only prone to thermal deformation, but also seriously damages the galvanized anti-corrosion layer on the surface of the component.

[0004] Second, existing frame joints are mostly limited to unidirectional or bidirectional connections, making it difficult to achieve flexible expansion in four or more directions within three-dimensional space, which severely restricts the flexibility of modular assembly.

[0005] Third, existing light steel keels typically lack integrated mounting interfaces, requiring additional design and installation of auxiliary supports when installing external display panels, information screens, and other auxiliary equipment. This not only increases material and labor costs but also complicates the installation process and results in poor overall structural integrity and aesthetics.

[0006] Fourth, existing welding or traditional bolt connection methods are extremely difficult to modify or dismantle in the later stages, often causing damage to the components and resulting in a very low rate of material reuse.

[0007] In summary, how to solve the problems of connecting closed components, multi-directional flexible expansion, and integrated installation of external panels has become an urgent issue for those skilled in the art. Summary of the Invention

[0008] To address the technical problems in the background art, this invention discloses a multi-directional snap-fit ​​quick-connect light steel modular frame structure.

[0009] This invention provides a multi-directional snap-fit ​​quick-connect light steel modular frame structure, including a square tube, a steering fixing head, and an end connecting plate; One side of the end connecting plate is inserted into the square tube, and the end connecting plate and the square tube are limited in the direction perpendicular to the length of the square tube by a male and female snap-fit ​​structure. The end connecting plate is provided with a tongue which is elastically connected. The tongue is clamped in the locking groove on the side wall of the square pipe to limit the end connecting plate in the length direction of the square pipe. The steering fixing head has connecting surfaces extending in the vertical direction and in two mutually perpendicular horizontal directions, and calabash holes are arranged on the connecting surfaces. The head of the connecting bolt faces the connecting surface and moves towards the connecting surface, and then is inserted through the large hole of the calabash hole and clamped at the small hole of the calabash hole to realize the clamping connection between the connecting bolt and the steering fixing head. The screw rod of the connecting bolt passes through the end connecting plate and is locked and fixed by a nut. Two adjacent square pipes which are perpendicular or collinear to each other are connected into a whole through the steering fixing head and the end connecting plate. The outer side surface of the square pipe is provided with mounting grooves extending along its length direction, and the four mounting grooves are connected end to end in sequence for clamping and fixing the外挂设备 (external equipment).

[0010] Furthermore, a washer is also arranged between the connecting surface and the end connecting plate, and the washer is sleeved on the screw rod of the connecting bolt.

[0011] Furthermore, the inner side wall of the square pipe is provided with a clamping strip which protrudes inwards and extends along the length direction of the square pipe. The outer side surface of the end connecting plate is provided with a clamping groove which is clamped with the clamping strip.

[0012] Furthermore, the bottom of the mounting groove protrudes from the inner side wall of the square pipe, and the protruding part forms a clamping strip. [[ID=2 3]]

[0013] Furthermore, the steering fixing head is in the structure of a cuboid frame with one side open, and the connecting surface is a surface enclosing a "hui" character shape.

[0014] Furthermore, transverse reinforcing plates and longitudinal reinforcing plates which are perpendicular to each other are arranged inside the steering fixing head.

[0015] Furthermore, the tongue is arranged on one side of the end connecting plate for connecting the square pipe. The tongue is in an L shape and includes a connecting part parallel to the thickness direction of the end connecting plate and a clamping part extending towards the outside of the end connecting plate. The connecting part is elastically connected with the end connecting plate through a spring. The clamping part is clamped into the locking groove under the elastic force of the spring.

[0016] Furthermore, an L-shaped fixing plate extending towards the center position is arranged on the end connecting plate. One end of the spring is fixedly connected with the connecting part, and the other end is fixedly connected with the part of the fixing plate parallel to the connecting part.

[0017] The beneficial effects of the present invention are: 1. This invention achieves locking and fixing by using a male-female snap-fit ​​structure between the end connecting plate and the square tube, and a snap-fit ​​structure between the elastic latch and the locking port of the square tube, eliminating the need for operation inside the square tube or double-sided construction. Furthermore, the snap-fit ​​design between the connecting bolt and the hoist hole allows for connection by tightening the nut from only one side from the outside, significantly improving assembly efficiency and avoiding the problems of heat deformation and plating damage caused by welding.

[0018] 2. The steering fixing head has a vertical connection surface and two mutually perpendicular horizontal connection surfaces. Each connection surface has a gourd hole, which can connect square tubes in multiple directions at the same time. This realizes the four-way or multi-way modular expansion of the frame in three-dimensional space, which greatly improves the flexibility and adaptability of the structural combination and meets the needs of complex spatial layout.

[0019] 3. The outer surface of the square tube is provided with continuously extending mounting grooves. The four mounting grooves are connected end to end to form a complete ring-shaped snap-fit ​​structure. External equipment can be directly snapped into the mounting grooves without the need for additional auxiliary supports, which reduces material and labor costs and improves the ease of assembly.

[0020] 4. The entire frame structure is based on the cooperation of clips and bolts, requiring no welding. During disassembly, simply loosen the nuts, remove the bolts, and release the latches to separate the components. This will not damage the square tube, steering fixing head, or end connecting plate, thereby improving the reuse rate. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the structure of the present invention matching an external device; Figure 2 This is a schematic diagram of the structure of the present invention that matches two external devices; Figure 3 This is a schematic diagram of the square tube structure; Figure 4 This is a structural schematic diagram of the end connecting plate; Figure 5 This is a schematic diagram of the steering fixed head; Figure 6 This is a structural schematic diagram of the steering fixation head from another perspective; Figure 7 This is a structural schematic diagram of the steering fixed head from the third perspective; Figure 8 This is a front view of the steering fixation head display reinforcement plate; Figure 9 This is a schematic diagram of the connection structure between the steering fixing head and the connecting bolts; Figure 10 This is an exploded view of the connection between the connecting bolts and the end connecting plate; Figure 11 This is a schematic diagram of the structure after the steering fixing head and the end connecting plate are connected; Figure 12 This is a structural diagram of the end connecting plate before it is connected to the square tube; Figure 13 yes Figure 12 Enlarged view of point A in the middle; In the diagram: 1. Square tube; 2. Steering fixing head; 3. End connecting plate; 4. Connecting bolt; 5. Nut; 6. Washer; 7. Spring; 8. External equipment; 11. Locking hole; 12. Mounting groove; 13. Locking strip; 21. Connecting surface; 22. Hoist hole; 23. Transverse reinforcing plate; 24. Longitudinal reinforcing plate; 25. Locking plate; 31. Locking tongue; 32. Locking groove; 33. Fixing plate; 311. Connecting part; 312. Locking part. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0024] like Figure 1 and Figure 2 As shown, the present invention discloses a multi-directional snap-fit ​​quick-connect light steel modular frame structure, including a square tube 1, a steering fixing head 2, and an end connecting plate 3.

[0025] like Figure 4 As shown, the end connecting plate 3 is a square plate with the same side length as the square tube 1. A protrusion forming a square retaining plate 25 is provided on one side of the end connecting plate 3. The side of the retaining plate 25 is parallel to and equidistant from the side of the end connecting plate 3. Each side of the retaining plate 25 has two symmetrical retaining grooves 32 on its outer wall. (See diagram below.) Figure 3 As shown, each side of the inner wall of the square tube 1 is provided with a locking strip 13 with a locking groove 32, and in order to facilitate the processing and forming of the locking strip 13, the locking strip 13 extends to both ends along the length direction of the square tube 1. When the locking plate 25 is inserted into the square tube 1, the locking strip 13 engages with the locking groove 32, thereby limiting the end connecting plate 3 in the direction perpendicular to the length of the square tube 1.

[0026] The card plate 25 is also provided with a latch 31 and a fixing plate 33; such as Figure 9-11 As shown, the latch 31 is L-shaped, including a connecting portion 311 parallel to the thickness direction of the end connecting plate 3 and a latching portion 312 extending outward from the end connecting plate 3. The fixing plate 33 is L-shaped and extends towards the center of the latch plate 25. One end of the spring 7 is fixedly connected to the connecting portion 311, and the other end is fixedly connected to the portion of the fixing plate 33 parallel to the connecting portion 311. Locking slots 11 for latching the latch 31 are provided on the sides of the ends of the square tube 1.

[0027] like Figure 12 and Figure 13 As shown in Figure 13 , the fixing plate 33 provides a stable and directional support point for the spring 7, making the telescopic direction of the spring 7 consistent with the movement direction of the tongue 31. After the tongue 31 is compressed by an external force, it can accurately and quickly reset by the elastic force of the spring 7 and snap into the locking port 11 of the square pipe 1, thereby enhancing the reliability of the end connecting plate 3 being limited in the length direction of the square pipe 1 and avoiding connection failure caused by the spring 7 being skewed or stuck. When the clamping plate 25 is inserted into the square pipe 1, the spring 7 is in a compressed state; when the end of the square pipe 1 abuts against the end connecting plate 3, the clamping portion 312 just moves to the position of the locking port 11 and snaps into the locking port 11 under the elastic force of the spring 7 to limit the end connecting plate 3 in the length direction of the square pipe 1.

[0028] As Figure 5 and Figure 6 As shown in Figure 6 , the steering fixing head 2 has a rectangular parallelepiped and a frame structure with an open side on one side. The surface that encloses a "hui" character shape is set as the connecting surface 21 for connecting with the end connecting plate 3. Its specific connecting structure is: there are calabash holes 22 on the connecting surface 21. The head of the connecting bolt 4 faces the connecting surface 21 and moves towards the connecting surface 21, and then is inserted through the large hole of the calabash hole 22 and snapped at the small hole of the calabash hole 22 to achieve the clamping connection between the connecting bolt 4 and the steering fixing head 2. The screw of the connecting bolt 4 passes through the end connecting plate 3 and is locked and fixed by a nut 5, thus realizing the connection and fixation between the steering fixing head 2 and the end connecting plate 3.

[0029] To improve the structural strength of the steering fixing head 2, as Figure 7 and Figure 8 shown in Figure 8 , there are horizontal reinforcing plates 23 and vertical reinforcing plates 24 perpendicular to each other inside the steering fixing head 2.

[0030] Due to the frame structure in this embodiment having a small load-bearing capacity, only one connecting bolt 4 is required for one connecting surface 21 to meet the strength requirements; however, during the splicing process, relative rotation may occur between the steering fixing head 2 and the end connecting surface 21, resulting in wear. Therefore, a washer 6 is also provided between the connecting surface 21 and the end connecting plate 3, and the washer 6 is sleeved on the screw of the connecting bolt 4.

[0031] The open side of the steering fixing head 2 faces horizontally, and the connecting surfaces 21 are distributed on the left and right sides and the upper and lower sides, so that adjacent square pipes 1 can be spliced collinearly or perpendicularly.

[0032] The gourd-shaped holes 22 on two opposite connecting surfaces 21 extend horizontally in opposite directions; the gourd-shaped holes 22 on the remaining two opposite connecting surfaces 21 extend vertically in opposite directions. When the square tubes 1 are assembled into a ring-shaped frame, the vertically extending square tubes 1 and the horizontally extending square tubes 1 are constrained by the different orientations of the gourd-shaped holes 22, thus maintaining the coplanarity of the turning fixing head 2 and the square tubes 1.

[0033] The outer surface of the square tube 1 is provided with a mounting groove 12 extending along its length. The four mounting grooves 12 on the inner side of the frame are connected end to end in sequence. The end of the external device 8 is inserted into the mounting groove 12 for fixation. The external device 8 can be a display screen or a display board.

[0034] The bottom of the mounting groove 12 protrudes from the inner wall of the square tube 1, and the protruding part forms a retaining strip 13. The mounting groove 12 itself is used to attach external equipment 8 such as display parts, while the protruding part at the bottom of the groove also serves as a retaining strip 13. This achieves the dual function of a single structure simultaneously undertaking external installation and internal connection limiting, avoiding the occupation of internal space or increase in wall thickness due to the addition of an independent retaining strip 13.

[0035] Compared with existing technologies, the advantages of this embodiment are: 1. This invention achieves snap-fit ​​and fixation through the male-female snap-fit ​​structure between the end connecting plate 3 and the square tube 1, and the snap-fit ​​structure between the elastic latch 31 and the locking port 11 of the square tube 1, eliminating the need for operation inside the square tube 1 or double-sided construction. Furthermore, the snap-fit ​​design between the connecting bolt 4 and the gourd hole 22 allows connection to be completed simply by tightening the nut 5 from one side externally, significantly improving assembly efficiency and avoiding thermal deformation and plating damage caused by welding. 2. The steering fixing head 2 has vertical and two mutually perpendicular horizontal connecting surfaces 21, each with a gourd hole 22, allowing simultaneous connection of square tubes 1 in multiple directions. This enables four-way or multi-way modular expansion of the frame in three-dimensional space, greatly improving the flexibility and adaptability of the structural combination and meeting the needs of complex spatial layouts. 3. The outer surface of the square tube 1 has continuously extending mounting grooves 12, with four mounting grooves 12 connected end-to-end to form a complete annular snap-fit ​​structure. The external device 8 can be directly snapped into the mounting slot 12 without the need for additional auxiliary supports, reducing material and labor costs and improving assembly convenience. 4. The entire frame structure is based on the cooperation of snaps and bolts, requiring no welding. Disassembly only requires loosening the nut 5, removing the bolt, and releasing the latch 31 to separate the components, without damaging the square tube 1, the steering fixing head 2, and the end connecting plate 3, thereby improving the reuse rate.

[0036] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A multi-directional snap-fit ​​quick-connect light steel modular frame structure, characterized in that: It includes a square tube (1), a steering fixed head (2) and an end connecting plate (3); One side of the end connecting plate (3) is inserted into the square tube (1), and the end connecting plate (3) and the square tube (1) are limited in the direction perpendicular to the length direction of the square tube (1) through a male-female clamping structure; The end connecting plate (3) is provided with an elastically connected tongue (31), and the tongue (31) is clamped into the locking opening (11) on the side wall of the square tube (1) to limit the end connecting plate (3) in the length direction of the square tube (1); The steering fixed head (2) has connecting surfaces (21) extending in the vertical direction and in two mutually perpendicular horizontal directions, and calabash holes (22) are arranged on the connecting surfaces (21); The head of the connecting bolt (4) faces the connecting surface (21) and moves towards the connecting surface (21), and then is inserted through the large hole of the calabash hole (22) and clamped at the small hole of the calabash hole (22) to realize the clamping connection between the connecting bolt (4) and the steering fixed head (2); The screw of the connecting bolt (4) passes through the end connecting plate (3) and is locked and fixed by a nut (5); Two adjacent square tubes (1) that are perpendicular or collinear to each other are connected into a whole through the steering fixed head (2) and the end connecting plate (3); An installation groove (12) extending along the length direction is arranged on the outer side surface of the square tube (1), and the four installation grooves (12) are connected end to end in sequence for clamping and fixing an external hanging device (8).

2. The multi-directional snap-fit ​​quick-connect light steel modular frame structure according to claim 1, characterized in that: A washer (6) is further arranged between the connecting surface (21) and the end connecting plate (3), and the washer (6) is sleeved on the screw of the connecting bolt (4).

3. The multi-directional snap-fit ​​quick-connect light steel modular frame structure according to claim 1, characterized in that: A clamping strip (13) that protrudes inwards and extends along the length direction of the square tube (1) is arranged on the inner side wall of the square tube (1); A clamping groove (32) that is clamped with the clamping strip (13) is arranged on the outer side surface of the end connecting plate (3).

4. A multi-directional snap-fit ​​quick-connect light steel modular frame structure according to claim 3, characterized in that: The bottom of the installation groove (12) protrudes from the inner side wall of the square tube (1), and the protruding part forms the clamping strip (13).

5. A multi-directional snap-fit ​​quick-connect light steel modular frame structure according to claim 1, characterized in that: The steering fixed head (2) has a cuboid and frame structure with one side open, and the connecting surface (21) is a surface enclosing a "return" shape.

6. A multi-directional snap-fit ​​quick-connect light steel modular frame structure according to claim 5, characterized in that: A transverse reinforcing plate (23) and a longitudinal reinforcing plate (24) that are perpendicular to each other are arranged inside the steering fixed head (2).

7. A multi-directional snap-fit ​​quick-connect light steel modular frame structure according to claim 1, characterized in that: The tongue (31) is arranged on one side of the end connecting plate (3) for connecting the square tube (1); The tongue (31) is L-shaped and includes a connecting portion (311) parallel to the thickness direction of the end connecting plate (3) and a clamping portion (312) extending towards the outside of the end connecting plate (3); The connecting portion (311) is elastically connected to the end connecting plate (3) through a spring (7); The clamping portion (312) is clamped into the locking opening (11) under the elastic force of the spring (7).

8. A multi-directional snap-fit ​​quick-connect light steel modular frame structure according to claim 7, characterized in that: An L-shaped fixing plate (33) that extends towards the center position is arranged on the end connecting plate (3); One end of the spring (7) is fixedly connected to the connecting portion (311), and the other end is fixedly connected to the part of the fixing plate (33) parallel to the connecting portion (311).

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