A table and chair steel frame connection structure to prevent decorative covers from falling off

Abstract

This utility model relates to the field of furniture structure technology, and in particular to a table and chair steel frame connection structure to prevent decorative covers from falling off. The connector includes an outer frame; multiple connecting frames are provided on the outer side wall of the outer frame; profiles are fixed to each connecting frame; decorative inner threads are provided on the decorative cover; two connecting frames are located on the same horizontal plane; the other connecting frame is perpendicular to the horizontal plane; the inner cavity of the outer frame has a fan-shaped cross-section; the inner cavity of the outer frame is provided with a sealing plate with an arc-shaped surface; a decorative connecting through hole is provided in the middle of the sealing plate. The sealing plate connects the inner side walls of the outer frame structure into one unit, ensuring the overall strength of the connector; the connector is equipped with a sealing plate for connecting the area of ​​the decorative cover, which is used to fix the decorative cover into one unit, improving the anti-loosening effect and reducing the risk of the decorative cover falling off.

Description

Technical Field

[0001] This utility model relates to the field of furniture structure technology, and in particular to a table and chair steel frame connection structure to prevent decorative covers from falling off. Background Technology

[0002] In the field of table and chair manufacturing, steel frame structures are widely used in products such as office chairs, conference tables, and student desks and chairs due to their high strength and stability. These steel frames typically consist of multiple metal profiles (such as square or round tubes) as the main support structure. These profiles are connected in space via connectors, with the T-joint being one of the core connectors. Its structure resembles a spatial coordinate system, allowing for simultaneous connection of profiles in three directions, thus enabling three-dimensional assembly of the steel frame. In existing assembly processes, the common method for fixing profiles and tee connectors is bolt connection: pre-drilled screw holes are pre-drilled at the ends of the profiles and the corresponding interfaces of the tee connectors. During assembly, the end of the profile is fitted onto or abutted against the interface end of the tee connector, and bolts are passed through the screw holes and tightened to fix the profile and tee connector into a single unit, forming a stable load-bearing structure. Meanwhile, to prevent the connection between the tee connector and the bolts from being exposed—preventing dust accumulation and moisture corrosion leading to bolt rust—and to improve the overall neatness of the table and chair appearance, the industry typically equips the tee connector with a decorative cover, concealing the connection within the cover, thus combining protection and aesthetics. Currently, the mainstream connection structure between the decorative cover and the tee connector adopts a direct snap-fit ​​design. Specifically, the inner wall of the decorative cover is provided with elastic snap-fit ​​protrusions or buckles, while the outer wall of the tee connector is correspondingly machined with snap-fit ​​grooves or mating surfaces. During assembly, external force is applied to press the decorative cover, causing the elastic protrusions to embed into the snap-fit ​​grooves or abut against the mating surfaces. The decorative cover is positioned and fixed by the friction between the decorative cover and the tee connector, without the need for additional fasteners. However, this friction-dependent connection structure has significant technical defects: First, tables and chairs inevitably experience vibration and collisions during daily use (such as the impact on the ground when moving tables and chairs, and the force transmitted from the tabletop to the steel frame during use). Under long-term effects, the gap between the decorative cover and the T-joint will gradually increase, and the friction between the two will decrease accordingly. Second, the elastic snap-fit ​​structure of the decorative cover is prone to fatigue deformation after repeated assembly and disassembly (such as when the decorative cover needs to be removed when repairing the steel frame), and the snap-fit ​​tightness will be further reduced. Utility Model Content

[0003] The purpose of this utility model is to address the defects and shortcomings of the existing technology by providing a table and chair steel frame connection structure that prevents the decorative cover from falling off.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The present invention relates to a table and chair steel frame connection structure for preventing decorative covers from falling off, comprising a decorative cover and a connector; the connector includes an outer frame; multiple connecting frames are provided on the outer side wall of the outer frame; profiles are fixed on each connecting frame; and decorative inner teeth are provided on the decorative cover. Two of the connecting frames are set on the same horizontal plane; the other connecting frame is perpendicular to the horizontal plane; the inner cavity of the outer frame has a fan-shaped cross-section; the inner cavity of the outer frame is provided with a sealing plate with an arc-shaped surface; a decorative connecting through hole is provided in the middle of the sealing plate.

[0005] Furthermore, the connecting frame, outer frame, and sealing plate are integrally die-cast.

[0006] Furthermore, a connecting pipe is fixed inside the profile; the inner hole of the connecting pipe is provided with an internal thread; the outer frame is provided with profile connecting through holes inside the connecting frame; the outer ring of the connecting frame matches the inner hole of the profile.

[0007] Furthermore, multiple reinforcing ribs are evenly distributed on the side wall of the connecting pipe; the reinforcing ribs are fixed to the inner side wall of the profile. The connecting frame is provided with multiple positioning grooves that match the reinforcing ribs; the reinforcing ribs are respectively inserted into the positioning grooves.

[0008] Furthermore, the side wall of the connecting pipe is provided with reinforcing ribs; the reinforcing ribs are fixed to the inner side wall of the profile; the profile is provided with slots; the interior of the connecting frame is provided with positioning grooves and inserts; the inserts are inserted into the slots; the reinforcing ribs are inserted into the positioning grooves.

[0009] Furthermore, a retaining ring is provided between the connector and the profile; the inner cavity of the retaining ring matches the profile; an inner protruding ring is provided on the inner side wall of the retaining ring; after the profile is inserted into the retaining ring, it abuts against the end face of the inner protruding ring; after the connecting frame is inserted into the retaining ring, it abuts against the inner protruding ring.

[0010] Furthermore, the outer frame is provided with an opening slot; the opening slot is located between two connecting frames on the same horizontal plane.

[0011] Furthermore, decorative side positioning plates are provided on both sides of the decorative cover; the decorative side positioning plates are respectively pressed against both sides of the outer frame.

[0012] The beneficial effects of this utility model after adopting the above structure are as follows: the various profiles are connected and fixed into an integrated structure through the outer frame, and after the two connecting frames set on the same horizontal plane connect the profiles, the two profiles form a horizontal support plane, while the connecting frame perpendicular to the horizontal plane serves as the profile for connecting support feet; the decorative cover is fixed to the outer frame by threading the bolts through the decorative connecting through holes and connecting them with the internal threads of the decorative inner toothed column; the sealing plate connects the inner walls of the outer frame of the frame structure into an integrated structure, ensuring the overall strength of the connector; the connector adds a sealing plate for connecting the decorative cover area, which is used to connect and fix the decorative cover into an integrated structure, with better anti-loosening effect and reduced risk of the decorative cover falling off. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of this utility model; Figure 3 This is a structural diagram of a profile in one embodiment; Figure 4 This is a structural diagram of the profile in another embodiment; Figure 5 This is a structural diagram of the buckle; Figure 6 This is a first-view structural diagram of the connector; Figure 7 It is the second-view structure of the connector; Figure 8 It is a third-view structure of the connector; Figure 9 This is a structural diagram of the decorative cover; Explanation of reference numerals in the attached figures: 1. Decorative cover; 101. Decorative side positioning plate; 102. Decorative internal thread post; 2. Connector; 201. Connecting frame; 20101. Positioning groove; 20102. Insert block; 202. Profile connecting through hole; 203. Decorative connecting through hole; 204. Opening groove; 205. Outer frame; 206. Sealing plate; 3. Profile; 301. Reinforcing rib; 302. Connecting pipe; 303. Slot; 4. Buckle; 401. Inner protruding ring. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] like Figures 1 to 9As shown, the table and chair steel frame connection structure for preventing decorative covers from falling off according to this utility model includes a decorative cover 1 and a connector 2; the connector 2 includes an outer frame 205; a plurality of connecting frames 201 are provided on the outer side wall of the outer frame 205; a profile 3 is fixed on each connecting frame 201; and a decorative inner tooth post 102 is provided on the decorative cover 1. Two connecting frames 201 are set on the same horizontal plane; another connecting frame 201 is perpendicular to the horizontal plane; the inner cavity of the outer frame 205 has a fan-shaped cross-section; the inner cavity of the outer frame 205 is provided with a sealing plate 206 in the shape of an arc surface; a decorative connecting through hole 203 is provided in the middle of the sealing plate 206; Each profile 3 is connected and fixed into an integral structure by an outer frame 205. After the two connecting frames 201 set on the same horizontal plane connect the profile 3, the two profiles 3 form a horizontal support plane, while the connecting frame 201 perpendicular to the horizontal plane serves as the profile 3 connecting the support foot. After the bolt passes through the decorative connecting through hole 203, it is threaded to the internal thread of the inner hole of the decorative inner tooth post 102, thus fixing the decorative cover 1 to the outer frame 205; the sealing plate 206 connects the inner walls of the outer frame 205 of the frame structure into one piece, ensuring the overall strength of the connector 2. The connector 2 is equipped with a sealing plate 206 for connecting the area of ​​the decorative cover 1, which is used to connect and fix the decorative cover 1 into one piece, with better anti-loosening effect and reduced risk of the decorative cover 1 falling off.

[0016] In a preferred embodiment of this utility model, the connecting frame 201, the outer frame 205, and the sealing plate 206 are integrally die-cast.

[0017] In a preferred embodiment of this utility model, a connecting pipe 302 is fixed inside the profile 3; the inner hole of the connecting pipe 302 is provided with an internal thread; the outer frame 205 is provided with profile connecting through holes 202 inside the connecting frame 201; the outer ring of the connecting frame 201 matches the inner hole of the profile 3. After the connecting frame 201 is inserted into the inner hole of the profile 3, the bolt passes through the connecting through hole 202 of the profile and is threadedly connected to the internal thread of the connecting pipe 302, thus fixing the profile 3 onto the outer frame 205.

[0018] In a preferred embodiment of this utility model, multiple reinforcing ribs 301 are evenly distributed on the side wall of the connecting pipe 302; the reinforcing ribs 301 are fixed on the inner side wall of the profile 3. The connecting frame 201 is provided with a plurality of positioning grooves 20101 that match the reinforcing ribs 301; the reinforcing ribs 301 are respectively inserted into the positioning grooves 20101; The reinforcing rib 301 can enhance the strength of the profile 3, so that the connecting pipe 302 is positioned on the strong profile 3, and enhance the connection strength between the profile 3 and the connector 2; Furthermore, by inserting reinforcing ribs 301 into the positioning groove 20101, the profile 3 and the connector 2 are less likely to rotate.

[0019] In a preferred embodiment of this utility model, a reinforcing rib 301 is provided on the side wall of the connecting pipe 302; the reinforcing rib 301 is fixed on the inner side wall of the profile 3; a slot 303 is provided on the profile 3; a positioning groove 20101 and an insert block 20102 are provided inside the connecting frame 201; the insert block 20102 is inserted into the slot 303; and the reinforcing rib 301 is inserted into the positioning groove 20101. The reinforcing rib 301 is inserted into the positioning groove 20101 and the insert 20102 is inserted into the slot 303; the edge of the insert 20102 is pressed against the slot 303, and together with the reinforcing rib 301, it is positioned in the positioning groove 20101, thereby realizing the positioning of the connecting frame 201 and the profile 3.

[0020] In a preferred embodiment of this utility model, a retaining ring 4 is provided between the connector 2 and the profile 3; the inner cavity of the retaining ring 4 matches the profile 3; an inner protruding ring 401 is provided on the inner side wall of the retaining ring 4; after the profile 3 is inserted into the retaining ring 4, it abuts against the end face of the inner protruding ring 401; after the connecting frame 201 is inserted into the retaining ring 4, it abuts against the inner protruding ring 401. The buckle 4 positions the connecting frame 201 and the profile 3, and can also be used to decorate the gap between the connecting frame 201 and the profile 3.

[0021] In a preferred embodiment of the present invention, the outer frame 205 is provided with an opening groove 204; the opening groove 204 is disposed between two connecting frames 201 on the same horizontal plane. After the positioning bolts are installed at the bottom of the tabletop, the bolts are inserted into the openings 204 of the outer frame 205, and the bolt heads are stuck at the bottom of the outer frame 205, thus fixing the outer frame 205 to the tabletop and improving the installation efficiency of the tabletop.

[0022] As a preferred embodiment of this utility model, decorative side positioning plates 101 are provided on both sides of the decorative cover 1; the decorative side positioning plates 101 are pressed against both sides of the outer frame 205 respectively, and when the decorative cover 1 and the connector 2 are assembled, the decorative cover 1 and the connector 2 are aligned by the decorative side positioning plates 101 pressing against both sides of the outer frame 205 respectively.

[0023] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A table and chair steel frame connection structure to prevent decorative covers from falling off, characterized in that: It includes a decorative cover (1) and a connector (2); the connector (2) includes an outer frame (205); a plurality of connecting frames (201) are provided on the outer side wall of the outer frame (205); a profile (3) is fixed on each connecting frame (201); a decorative inner tooth post (102) is provided on the decorative cover (1); Two of the connecting frames (201) are set on the same horizontal plane; another connecting frame (201) is perpendicular to the horizontal plane; the inner cavity of the outer frame (205) has a fan-shaped structure; the inner cavity of the outer frame (205) is provided with a sealing plate (206) in the shape of an arc surface; a decorative connecting through hole (203) is provided in the middle of the sealing plate (206).

2. The table and chair steel frame connection structure for preventing decorative covers from falling off according to claim 1, characterized in that: The connecting frame (201), outer frame (205) and sealing plate (206) are integrally die-cast.

3. The table and chair steel frame connection structure for preventing decorative covers from falling off according to claim 1, characterized in that: The profile (3) has a connecting pipe (302) fixed inside; the inner hole of the connecting pipe (302) is provided with an internal thread; the outer frame (205) is provided with a profile connecting through hole (202) inside the connecting frame (201); the outer ring of the connecting frame (201) matches the inner hole of the profile (3).

4. The table and chair steel frame connection structure for preventing decorative covers from falling off according to claim 3, characterized in that: Multiple reinforcing ribs (301) are evenly distributed on the side wall of the connecting pipe (302); the reinforcing ribs (301) are fixed on the inner side wall of the profile (3); The connecting frame (201) is provided with a plurality of positioning grooves (20101) that match the reinforcing ribs (301); the reinforcing ribs (301) are respectively inserted into the positioning grooves (20101).

5. A table and chair steel frame connection structure for preventing decorative covers from falling off according to claim 3, characterized in that: The connecting pipe (302) has a reinforcing rib (301) on its side wall; the reinforcing rib (301) is fixed to the inner side wall of the profile (3); the profile (3) has a slot (303); the connecting frame (201) has a positioning groove (20101) and a plug (20102) inside; the plug (20102) is inserted into the slot (303); the reinforcing rib (301) is inserted into the positioning groove (20101).

6. The table and chair steel frame connection structure for preventing decorative covers from falling off according to claim 1, characterized in that: A retaining ring (4) is provided between the connector (2) and the profile (3); the inner cavity of the retaining ring (4) matches the profile (3); an inner protruding ring (401) is provided on the inner side wall of the retaining ring (4); after the profile (3) is inserted into the retaining ring (4), it abuts against the end face of the inner protruding ring (401); after the connecting frame (201) is inserted into the retaining ring (4), it abuts against the inner protruding ring (401).

7. A table and chair steel frame connection structure for preventing decorative covers from falling off according to claim 1, characterized in that: An opening groove (204) is provided on the outer frame (205); the opening groove (204) is located between two connecting frames (201) on the same horizontal plane.

8. A table and chair steel frame connection structure for preventing decorative covers from falling off according to claim 1, characterized in that: The decorative cover (1) is provided with decorative side positioning plates (101) on both sides; the decorative side positioning plates (101) are pressed against both sides of the outer frame (205).

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