A movable floor connection structure with self-expanding tension locking

Abstract

The utility model provides a movable layer board connecting structure with self-expanding tension locking, and the expanding layer support includes an integrated expanding support platform and expanding cylinder sleeve, connecting rod and eccentric nut; the side plate of cabinet body is provided with side connecting holes, and the end of movable layer board is provided with lower support groove; the expanding cylinder sleeve and the inside tension expanding part are embedded in the side connecting holes, and the movable layer board is arranged above the expanding support platform through the lower support groove; when the eccentric nut rotates along the locking direction, the expanding cylinder sleeve and the expanding support platform are expanded synchronously, and the bidirectional pulling and locking of the side plate and the movable layer board are realized. The utility model significantly improves the anti-shaking ability of the movable layer board, eliminates the safety hidden danger caused by the displacement of the movable layer board; the rigid connecting node formed between the side plate and the movable layer board effectively inhibits the bending deformation trend of the high cabinet side plate in the use process, greatly enhances the structural stability and the torsional rigidity of the cabinet body, and prolongs the service life of the furniture.

Description

Technical Field

[0001] This invention relates to the field of cabinet assembly technology, and in particular to a movable shelf connection structure with self-expanding tensile locking. Background Technology

[0002] Customized whole-house furniture and cabinet furniture are common types of panel furniture. Their production and installation usually require personalized design based on the interior space layout. During manufacturing and assembly, the panels are mostly connected using hardware such as screws and bolts. A typical cabinet structure includes a back panel, side panels, bottom panel, top panel, and shelves located between the side panels. The shelves are further divided into movable shelves and fixed shelves.

[0003] For fixed shelves, in addition to bolt and screw connections, some manufacturers have also designed concealed connectors, such as eccentric connectors (i.e., three-in-one connectors, consisting of a screw, an eccentric wheel, and a pre-embedded nut). Existing pre-embedded nuts are mostly expansion bolt structures, relying on internal expansion inserts inserted into external sleeves to generate expansion and thus fix the shelf. However, with this fixing method, the shelf cannot be removed, making it difficult to meet users' flexible requirements for adjusting the height of the space according to their storage needs.

[0004] For movable shelves, right-angled shelf support structures are currently commonly used, with the movable shelf resting on multiple supports, such as the shelf support disclosed in patent CN212787974U. However, such shelf supports only provide vertical support for the movable shelf, lacking lateral tension and locking between the side panels and the movable shelf. On the one hand, the movable shelf is prone to wobbling or shifting; on the other hand, for taller cabinets, the lack of a shelf connection with actual locking force between the side panels, relying solely on the back panel for locking, can lead to bending and deformation of the side panels after long-term use. This can not only cause the movable shelf to detach from the shelf support but also cause distortion of the overall cabinet shape, affecting its aesthetics.

[0005] Therefore, it is necessary to further improve the existing layer connection structure. Summary of the Invention

[0006] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a movable layer connection structure with self-expanding tensile locking.

[0007] One embodiment of the present invention addresses its technical problem by providing a movable layer connection structure with self-expanding tensile locking, comprising: An expansion layer support includes an integrally connected expansion support platform and an expansion sleeve, both of which are hollow structures and are internally interconnected. A connecting rod is inserted into the expansion layer support. The connecting rod includes a connecting end at one end and a tensioning part at the other end. The tensioning part is housed within the expansion sleeve, and the connecting end extends into the inner cavity of the expansion support platform. An eccentric nut is rotatably installed below the expansion support and is movably engaged with the connecting end of the connecting rod; The side panel of the cabinet has a side connection hole, and the lower side of the end of the movable shelf has a lower support groove; the expansion sleeve and the internal expansion part are embedded in the side connection hole, and the movable shelf rests on the expansion support platform through the lower support groove; When the eccentric nut rotates in the locking direction, the connecting rod moves towards the inside of the expansion support under the drive of the eccentric nut, and the expansion part moves axially to force the expansion sleeve to expand and deform radially, thereby fastening it in the side connecting hole; at the same time, the eccentric nut squeezes the expansion support axially during rotation, forcing the expansion support to expand and deform radially, thereby fastening it in the lower support groove; the expansion sleeve and the expansion support expand synchronously, realizing bidirectional pulling and locking of the side plate and the movable layer plate.

[0008] Optionally, a limiting base is provided on the lower outer periphery of the expansion support, and at least one first expansion groove extending axially is provided on the expansion support; the cut-off position of the first expansion groove is located above the limiting base and does not penetrate the limiting base.

[0009] Optionally, the expansion sleeve is integrally formed on one side of the expansion support, and the expansion sleeve has at least one second expansion groove extending along the axial direction, and the first expansion groove and the second expansion groove are interconnected to form a continuous expansion gap.

[0010] Optionally, both the first expansion groove and the second expansion groove extend along the vertical axis and extend upward from the area above the limiting base until they penetrate the top of the expansion support and the expansion sleeve.

[0011] Optionally, the lower end face of the limiting base is provided with locking rails extending along the axial direction of the expansion sleeve on both sides; the decorative cover is slidably engaged on the locking rails to cover the accommodating space below the limiting base and conceal the eccentric nut.

[0012] Optionally, the top of the inner cavity of the expansion support is provided with a conical wall, or the inner wall surface of the expansion support is provided as a wedge-shaped inclined surface that gradually narrows from bottom to top; when the eccentric nut rotates, the eccentric nut is displaced relative to the connecting end towards the top of the expansion support, and interacts with the conical wall or wedge-shaped inclined surface to generate radial expansion force.

[0013] Optionally, the inner and outer walls of the expansion support are provided with a number of vertically extending guide ribs.

[0014] Optionally, a wedge-shaped inclined surface is provided at the top of the guide reinforcing rib located on the outer wall of the expansion support to facilitate the expansion support to be embedded in the lower support groove of the movable shelf.

[0015] Optionally, the outer wall of the expansion sleeve is provided with a multi-layered inverted tooth structure; the expansion portion of the connecting rod is constructed as an inverted cone structure with a cross-sectional dimension that gradually narrows towards the connecting end.

[0016] Optionally, the expansion layer support is a component integrally injection molded from nylon material; the eccentric nut and the connecting rod are made of metal material.

[0017] The beneficial effects of this invention: This application provides a movable shelf connection structure with self-expanding tension locking. Through the coordinated operation of the expansion shelf support, connecting rod, and eccentric nut, the traditional "single-point vertical support" is upgraded to "two-way expansion tension locking." This structure not only achieves stable vertical support for the movable shelf but also applies a strong tension locking force to the side panel and the movable shelf in the horizontal direction. This design significantly improves the anti-shaking ability of the movable shelf and eliminates safety hazards caused by the displacement of the movable shelf. At the same time, the rigid connection node formed between the side panel and the movable shelf effectively suppresses the bending deformation tendency of the tall cabinet side panel during use, greatly enhancing the overall structural stability and torsional stiffness of the cabinet and extending the service life of the furniture. In addition, this structure allows users to disassemble and assemble the cabinet through a simple rotation operation, taking into account both the stability of the fixed shelf and the height adjustability of the movable shelf, meeting the dual needs of modern homes for flexible storage and long-term durability.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the movable shelf connection structure of the present invention; Figure 2 for Figure 1 Exploded view of the connection structure of the middle movable layer plate; Figure 3 for Figure 1 Schematic diagram of the structure of the intermediate expansion layer support; Figure 4 A schematic diagram of a cabinet using the movable shelf connection structure of the present invention; Figure 5 for Figure 4 A cross-sectional view of the middle cabinet at the expansion layer support.

[0020] Explanation of key component symbols: 10. Expansion layer support; 11. Expansion support platform; 111. First expansion groove; 112. Conical wall; 113. Guide reinforcing rib; 12. Expansion sleeve; 121. Second expansion groove; 122. Reverse tooth structure; 13. Limiting base; 14. Rail; 20. Connecting rod; 21. Connecting end; 22. Tension section; 30. Eccentric nut; 40. Side plate; 41. Side connecting hole; 50. Movable shelf; 51. Lower support groove; 60. Decorative cover. Detailed Implementation

[0021] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0022] In the description of this invention, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0024] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0025] Example Reference Figures 1 to 5 The present invention proposes a connection structure for a movable layer 50 with self-expanding tensile locking, comprising: The expansion layer support 10 includes an integrally connected expansion support platform 11 and expansion sleeve 12. Both the expansion support platform 11 and the expansion sleeve 12 are hollow structures and are interconnected internally. The connecting rod 20 is inserted into the expansion layer support 10. The connecting rod 20 includes a connecting end 21 at one end and a tensioning part 22 at the other end. The tensioning part 22 is housed in the expansion sleeve 12, and the connecting end 21 extends into the inner cavity of the expansion support 11. An eccentric nut 30 is rotatably mounted below the expansion support 11 and is movably engaged with the connecting end 21 of the connecting rod 20. The side panel 40 of the cabinet has a side connection hole 41, and the lower side of the end of the movable shelf 50 has a lower support groove 51; the expansion sleeve 12 and the internal expansion part 22 are embedded in the side connection hole 41, and the movable shelf 50 is placed on the expansion support 11 through the lower support groove 51. When the eccentric nut 30 rotates in the locking direction, the connecting rod 20 moves towards the inside of the expansion support 11 under the drive of the eccentric nut 30. The expansion part 22 is axially displaced to force the expansion sleeve 12 to expand and deform radially, thereby fastening it in the side connecting hole 41. At the same time, the eccentric nut 30 squeezes the expansion support 11 axially during rotation, forcing the expansion support 11 to expand and deform radially, thereby fastening it in the lower support groove 51. The expansion sleeve 12 and the expansion support 11 expand synchronously, realizing bidirectional pulling and locking of the side plate 40 and the movable layer plate 50.

[0026] This invention provides a self-expanding tension locking structure for movable shelf 50. Through the coordinated operation of the expansion shelf support 10, connecting rod 20, and eccentric nut 30, the traditional "single-point vertical support" is upgraded to "two-way expansion tension locking." This structure not only provides stable vertical support for the movable shelf 50 but also applies a strong tension locking force to the side panel 40 and the movable shelf 50 in the horizontal direction. This design significantly improves the anti-shaking ability of the movable shelf 50, eliminating safety hazards caused by displacement. Simultaneously, the rigid connection node formed between the side panel 40 and the movable shelf 50 effectively suppresses the bending deformation tendency of the tall cabinet side panel 40 during use, greatly enhancing the overall structural stability and torsional stiffness of the cabinet and extending the furniture's lifespan. Furthermore, this structure allows users to disassemble and assemble it through simple rotation, balancing the stability of the fixed shelf with the height adjustability of the movable shelf 50, meeting the dual needs of modern homes for flexible storage and long-term durability.

[0027] In this embodiment, a limiting base 13 is provided on the lower outer periphery of the expansion support 11, and at least one first expansion groove 111 extending axially is formed on the expansion support 11. The cut-off position of the first expansion groove 111 is located above the limiting base 13 and does not penetrate the limiting base 13. The setting of the limiting base 13 not only provides a precise installation positioning reference for the movable shelf 50 and prevents over-insertion, but more importantly, it acts as a structural reinforcing rib, limiting the extension range of the first expansion groove 111. This ensures that when the expansion support 11 expands and deforms, the area of ​​the limiting base 13 still maintains structural integrity, avoiding the risk of bottom cracking due to expansion force, and ensuring the strength limit and reliability of the connection structure itself.

[0028] Specifically, the expansion sleeve 12 is integrally formed on one side of the expansion support 11. The expansion sleeve 12 has at least one second expansion groove 121 extending axially, and the first expansion groove 111 and the second expansion groove 121 are interconnected to form a continuous expansion gap. The integral formation of the expansion support 11 and the expansion sleeve 12, along with the shared interconnected expansion groove structure, allows the expansion force under the action of the connecting rod 20's tensioning part 22 to be smoothly and evenly transmitted from the expansion sleeve 12 to the expansion support 11. This integrated elastic deformation design reduces stress concentration points, allowing the entire expansion layer support 10 to open evenly like an elastic clamp during the locking process, improving the fit to the mounting hole wall and the uniformity of locking.

[0029] Furthermore, both the first expansion groove 111 and the second expansion groove 121 extend along the vertical axis and extend upward from the area above the limiting base 13 until they penetrate the top of the expansion support 11 and the expansion sleeve 12. The vertically extending grooves concentrate the expansion force mainly in the horizontal radial direction, avoiding unnecessary axial movement. This design allows for maximum radial expansion with limited operating torque, significantly improving installation efficiency and locking force.

[0030] In this embodiment, the lower end face of the limiting base 13 is provided with two retaining rails 14 extending along the axial direction of the expansion sleeve 12; the decorative cover 60 is slidably engaged with the retaining rails 14 to cover the accommodating space below the limiting base 13 and conceal the eccentric nut 30. The decorative cover effectively conceals the eccentric nut 30 and the edge of the panel opening, preventing dust from entering and making the interior of the cabinet look clean and integrated. At the same time, the retaining structure facilitates quick removal of the decorative cover 60 for operation when the shelf height needs to be adjusted, improving the convenience of user maintenance.

[0031] In this embodiment, the top of the inner cavity of the expansion support 11 is provided with a conical wall portion 112, or the inner wall surface of the expansion support 11 is provided as a wedge-shaped inclined surface that gradually narrows from bottom to top. When the eccentric nut 30 rotates, the eccentric nut 30 moves relative to the connecting end 21 toward the top of the expansion support 11 and interacts with the conical wall portion 112 or the wedge-shaped inclined surface to generate a radial expansion force. When the eccentric nut 30 is pressed upward, its outer edge interacts with the conical inclined surface, efficiently converting the axial thrust into a radial expansion force, so that the expansion support 11 can generate sufficient deformation to fill the tiny gap in the lower support groove 51, achieving an interference fit and achieving a locking effect of "tightening" rather than just "locking".

[0032] Specifically, the inner and outer walls of the expansion support 11 are provided with several vertically extending guide ribs 113. These guide ribs 113 serve multiple functions. First, they act as auxiliary fillers in the flow channels during injection molding; second, they act as guide strips during installation, reducing the contact area between the expansion support 10 and the opening in the sheet metal, thereby lowering insertion resistance; third, after locking and expanding, the ribs embed into the sheet metal fibers, acting like teeth to prevent rotation, further enhancing the shear and torsional strength of the connection joint.

[0033] Furthermore, the top of the guide rib 113 located on the outer wall of the expansion support 11 is provided with a wedge-shaped slope to facilitate the insertion of the expansion support 11 into the lower support groove 51 of the movable shelf 50. During assembly, even if the machining tolerance of the lower support groove 51 of the movable shelf 50 is small, the wedge-shaped slope can guide the shelf to slide in smoothly and slightly open the opening of the lower support groove 51, reducing the assembly difficulty and avoiding the problem of damage or chipping of the edge banding of the sheet material that may be caused by hard hammering.

[0034] In this embodiment, the outer wall of the expansion sleeve 12 is provided with a multi-layered toothed structure 122; the expansion portion 22 of the connecting rod 20 is constructed as an inverted cone structure with a cross-sectional dimension that gradually narrows towards the connecting end 21. The multi-layered toothed structure 122 on the outer wall of the expansion sleeve 12 forms a "barb-like" interlocking state with the inner wall of the side connecting hole 41, which can resist axial pull-out force and prevent the connector from loosening. The inverted cone design of the expansion portion 22 ensures that the expansion force increases steadily from small to large during the pull-back process of the connecting rod 20, and the inverted cone surface forms a self-locking inclined surface with the inner wall of the expansion sleeve 12, effectively preventing the connecting rod 20 from loosening in the opposite direction under vibration.

[0035] Preferably, the expansion layer support 10 is a component integrally injection molded from nylon material; the eccentric nut 30 and connecting rod 20 are made of metal. The expansion layer support 10, made of nylon, possesses excellent toughness and elastic recovery, capable of withstanding repeated disassembly and assembly without permanent plastic deformation, and its self-lubricating properties facilitate the rotation of the eccentric nut 30. The eccentric nut 30 and connecting rod 20, made of metal, ensure strength and wear resistance under high tensile loads, guaranteeing stable maintenance of locking force over long-term use.

[0036] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. A movable shelf connection structure with self-expanding tensile locking, characterized in that, include: The expansion layer support (10) includes an integrally connected expansion support platform (11) and expansion sleeve (12), both of which are hollow structures and are internally interconnected. A connecting rod (20) is inserted into the expansion layer support (10). The connecting rod (20) includes a connecting end (21) at one end and a tensioning part (22) at the other end. The tensioning part (22) is housed in the expansion sleeve (12), and the connecting end (21) extends into the inner cavity of the expansion support (11). An eccentric nut (30) is rotatably mounted below the expansion support (11) and is movably engaged with the connecting end (21) of the connecting rod (20); The side panel (40) of the cabinet is provided with a side connection hole (41), and the lower side of the end of the movable shelf (50) is provided with a lower support groove (51); the expansion sleeve (12) and the internal expansion part (22) are embedded in the side connection hole (41), and the movable shelf (50) is placed on the upper part of the expansion support (11) through the lower support groove (51); When the eccentric nut (30) rotates in the locking direction, the connecting rod (20) moves towards the inside of the expansion support (11) under the drive of the eccentric nut (30), and the expansion part (22) moves axially to force the expansion sleeve (12) to expand and deform radially, thereby fastening it in the side connecting hole (41); at the same time, the eccentric nut (30) squeezes the expansion support (11) axially during rotation, forcing the expansion support (11) to expand and deform radially, thereby fastening it in the lower support groove (51); the expansion sleeve (12) and the expansion support (11) expand synchronously, realizing bidirectional pulling and locking of the side plate (40) and the movable layer plate (50).

2. The movable layer plate connection structure with self-expanding tensile locking according to claim 1, characterized in that: The lower outer periphery of the expansion support (11) is provided with a limiting base (13), and the expansion support (11) is provided with at least one first expansion groove (111) extending along the axial direction; the cut-off position of the first expansion groove (111) is located above the limiting base (13) and does not penetrate the limiting base (13).

3. The movable layer connection structure with self-expanding tensile locking according to claim 2, characterized in that: The expansion sleeve (12) is integrally formed on one side of the expansion support (11). The expansion sleeve (12) has at least one second expansion groove (121) extending axially, and the first expansion groove (111) and the second expansion groove (121) are interconnected to form a continuous expansion gap.

4. The movable layer connection structure with self-expanding tensile locking according to claim 3, characterized in that: Both the first expansion groove (111) and the second expansion groove (121) extend along the vertical axis and extend upward from the area above the limiting base (13) until they penetrate the top of the expansion support (11) and the expansion sleeve (12).

5. The movable layer plate connection structure with self-expanding tensile locking according to claim 2, characterized in that: The lower end face of the limiting base (13) is provided with a retaining rail (14) extending along the axial direction of the expansion sleeve (12); the decorative cover (60) is slidably engaged on the retaining rail (14) to cover the accommodating space below the limiting base (13) and to cover the eccentric nut (30).

6. The movable layer plate connection structure with self-expanding tensile locking according to claim 1, characterized in that: The top of the inner cavity of the expansion support (11) is provided with a conical wall (112), or the inner wall surface of the expansion support (11) is provided as a wedge-shaped inclined surface that gradually narrows from bottom to top; when the eccentric nut (30) rotates, the eccentric nut (30) moves relative to the connecting end (21) toward the top of the expansion support (11), and interacts with the conical wall (112) or the wedge-shaped inclined surface to generate a radial expansion force.

7. The movable layer connection structure with self-expanding tensile locking according to claim 1, characterized in that: The inner and outer walls of the expansion support (11) are provided with a number of vertically extending guide reinforcing ribs (113).

8. The movable layer plate connection structure with self-expanding tensile locking according to claim 7, characterized in that: The top of the guide reinforcing rib (113) located on the outer wall of the expansion support (11) is provided with a wedge-shaped inclined surface so that the expansion support (11) can be embedded into the lower support groove (51) of the movable shelf (50).

9. The movable layer plate connection structure with self-expanding tensile locking according to claim 1, characterized in that: The outer wall of the expansion sleeve (12) is provided with a multi-layered inverted tooth structure (122); the expansion part (22) of the connecting rod (20) is constructed as an inverted cone structure with the cross-sectional dimensions gradually narrowing in the direction toward the connecting end (21).

10. The movable layer plate connection structure with self-expanding tensile locking according to claim 1, characterized in that: The expansion layer support (10) is a component integrally injection molded from nylon material; the eccentric nut (30) and the connecting rod (20) are made of metal material.

Images