A four-in-one connector and furniture

Abstract

The application discloses a four-in-one connecting piece and furniture. The four-in-one connecting piece is used for connecting a first component and a second component of furniture. One end of a connecting rod of the four-in-one connecting piece is protruded to form a connecting boss. The connecting rod is locked in a first mounting hole of the first component through a mounting portion or a first expansion body or a second expansion body. An operating portion is arranged between the connecting boss and the mounting portion or a tapered portion of the connecting rod. A connecting groove is formed between the operating portion and the connecting boss. The operating portion is used for being driven to rotate by an external sleeve tool. A cross section of the operating portion is adapted to a cross section of the sleeve. A threaded fastener is threadedly connected in a connecting hole of an internal threaded member. One end of the threaded fastener is inserted into the connecting groove to limit the one end of the connecting rod with the connecting groove from being pulled out of the connecting channel. The furniture product can improve the invisibility after being connected according to the four-in-one connecting piece.

Description

[0001] This invention patent application is a divisional application of the original invention patent application with application number 202210018877.8 and application date of January 9, 2022, entitled "A connecting rod, connecting component and connecting system". Technical Field

[0002] This invention relates to a four-in-one connector for connecting a first component and a second component, particularly for connecting furniture components; this invention relates to a type of furniture. Background Technology

[0003] Currently, with the continuous improvement of people's aesthetic awareness, concealed connectors are increasingly being used to achieve hidden connections between two furniture panels, thereby improving the aesthetics of the furniture. Among these, three-in-one or four-in-one concealed connectors are widely used in connecting two furniture panels. For example... Figures 1-3 As shown, the existing three-in-one connector mainly consists of a pre-embedded nut 10, a connecting rod 20, and an eccentric wheel 30. In use, the pre-embedded nut 10 is pre-embedded in the first mounting hole 61 of the first component 6, the eccentric wheel 30 is installed in the second mounting hole 71 of the second component 7, the first end of the connecting rod 20 is firmly connected to the first component 6 through the pre-embedded nut 10, which serves as a reinforcement. The second end of the connecting rod 20 is inserted into the interior of the second component 7 and firmly connected to the eccentric wheel 30, thereby enabling the first component 6 and the second component 7 to achieve a concealed connection through the three-in-one connector. At the same time, the three-in-one connector has strong detachability, and the first component 6 and the second component 7 can be disassembled and assembled through multiple disassembly and assembly.

[0004] The connecting rod 20 is generally made of metal or a combination of metal and plastic. The second end of the connecting rod 20 has a round head 201 for connecting to the eccentric wheel 30. In the prior art, to enable the first end of the connecting rod 20 to rotate within the pre-embedded nut 10 for a secure connection, a slotted, Phillips, or hexagonal groove is provided on the round head 201 of the connecting rod 20. A screwdriver or hex wrench is used to rotate the round head 201 of the connecting rod 20 to allow the first end of the connecting rod 20 to rotate within the pre-embedded nut 10. In practice, to achieve optimal performance, the diameter and height of the round head 201 of the connecting rod 20 are designed to be relatively large, ensuring multiple operations. However, this necessitates a diameter greater than 12mm for the existing zinc alloy eccentric wheel 30, which is typically 15mm in diameter. Consequently, the diameter of the second mounting hole 71 on the second component 7 is larger, making the eccentric wheel 30 easily visible to the user. This reduces the concealment of the three-in-one connector, affecting the aesthetics of the furniture. Similarly, the four-in-one connector also suffers from a large diameter of the round head 201 of the connecting rod 20, resulting in a larger opening on the second component 7. This also reduces the concealment of the four-in-one connector and affects the aesthetics of the furniture. Summary of the Invention

[0005] To address the technical problem of low concealment when using existing four-in-one connectors in furniture, the first aspect of this invention provides a four-in-one connector, comprising a connecting rod, an internally threaded component, and a threaded fastener, for connecting a first component and a second component of furniture.

[0006] One end of the connecting rod protrudes to form a connecting boss, and the other end of the connecting rod is provided with a mounting part. An operating part is fixedly provided between the connecting boss and the mounting part, and a connecting groove is formed between the operating part and the connecting boss.

[0007] The cross-section of the operating part is adapted to the cross-section of the sleeve, and the operating part is used to be driven by the sleeve tool to lock the mounting part in the first mounting hole of the first component;

[0008] The internally threaded component is used to be installed in the second mounting hole of the second component. A connecting channel is provided on the outer side wall of the internally threaded component, and a connecting hole communicating with the connecting channel is provided on the top of the internally threaded component. The inner side wall of the connecting hole is provided with an internal thread that mates with a threaded fastener. At least a portion of the connecting groove is inserted into the position where the connecting channel and the connecting hole are connected through the mounting channel opened on the side wall of the second component. The threaded fastener is threadedly connected to the connecting hole, and one end of the threaded fastener is inserted into the connecting groove to prevent the end of the connecting rod with the connecting groove from being pulled out of the connecting channel.

[0009] A second aspect of the present invention provides a four-in-one connector, comprising a connecting rod, a first expansion body, an internal threaded component, and a threaded fastener, for connecting a first component and a second component of furniture. One end of the connecting rod protrudes to form a connecting boss, and the other end of the connecting rod is provided with a mounting portion, which is rotatably disposed within the first expansion body. The outer wall of the first expansion body is provided with at least one first fastening boss. The invention is characterized in that...

[0010] An operating part is fixedly provided between the connecting boss and the mounting part on the connecting rod, and a connecting groove is formed between the operating part and the connecting boss.

[0011] The cross-section of the operating part is adapted to the cross-section of the sleeve. The operating part is driven by the sleeve tool to rotate the mounting part inside the first expansion body by a certain angle, so that at least one first fastening boss expands outward along the radial direction of the first expansion body, thereby making at least one first fastening boss bite against the inner wall of the first mounting hole of the first component, so that the connecting rod is locked in the first mounting hole of the first component through the first expansion body.

[0012] The internally threaded component is used to be installed in the second mounting hole of the second component. A connecting channel is provided on the outer side wall of the internally threaded component, and a connecting hole communicating with the connecting channel is provided on the top of the internally threaded component. The inner side wall of the connecting hole is provided with an internal thread that mates with a threaded fastener. At least a portion of the connecting groove is inserted into the position where the connecting channel and the connecting hole are connected through the mounting channel opened on the side wall of the second component. The threaded fastener is threadedly connected to the connecting hole, and one end of the threaded fastener is inserted into the connecting groove to prevent the end of the connecting rod with the connecting groove from being pulled out of the connecting channel.

[0013] In some embodiments, the outer peripheral sidewall of the mounting part is provided with external threads along the transverse viewing direction of the mounting part, and the distance between the two ends of the mounting part along the third predetermined straight line direction is greater than the distance between the two ends along the fourth predetermined straight line direction along the transverse viewing direction of the mounting part; the shape and size of the hollow part inside the first expansion body are matched with the shape and size of the mounting part so that the mounting part can be smoothly inserted into the first expansion body through clearance fit.

[0014] When the operating part is driven by the external tool sleeve to achieve rotation, the mounting part rotates a certain angle inside the first expansion body so that at least one first fastening boss expands outward along the radial direction of the first expansion body, thereby causing at least one first fastening boss to engage with the inner wall of the first mounting hole of the first component.

[0015] Based on the above two technical solutions, the advantages of the four-in-one connector of the present invention compared with the prior art are as follows:

[0016] An operating part is fixedly provided between the connecting boss of the connecting rod and the mounting part. When the external tool sleeve drives the operating part to rotate, it drives the connecting rod to rotate. That is, the mounting part rotates synchronously with the operating part and locks at least a part of the mounting part with the first mounting hole of the first component (as in the first aspect of the technical solution above). Alternatively, the mounting part rotates synchronously with the operating part in the first expansion body and locks the first fastening boss with the inner wall of the first mounting hole of the first component (as in the second aspect of the technical solution above). This allows the connecting rod to be connected to the first component. The operation is simple and convenient, which helps to improve assembly efficiency.

[0017] The connecting rod of this invention, by providing an operating part between the connecting boss and the mounting part, avoids the limitations of the prior art where the connecting rod relies solely on a slotted, Phillips, or hexagonal groove on the connecting boss to drive the connecting rod to rotate via a screwdriver, thereby locking the mounting part (and expansion body) into the first mounting hole. This allows for a smaller diameter of the connecting boss, which in turn reduces the diameter of the internal thread component, resulting in a smaller diameter of the second mounting hole in the second component. This makes it difficult for the user to observe the internal thread component through the second mounting hole, improving its concealment on the second component and further enhancing the aesthetics of the finished furniture. Furthermore, compared to the prior art where only a screwdriver is used to operate on the slotted, Phillips, or hexagonal groove on the connecting boss, the operating part of this invention provides a larger force application area and more stable force application, which improves the stability of the connecting rod's assembly and disassembly on the first component, extends its service life, and increases economic efficiency.

[0018] A third aspect of the present invention provides a four-in-one connector, comprising a connecting rod, a second expansion body, an internal threaded component, and a threaded fastener, for connecting a first component and a second component of furniture.

[0019] One end of the connecting rod protrudes to form a connecting boss, and the other end of the connecting rod is provided with a tapered part. A driving external thread part is fixed between the connecting boss and the tapered part of the connecting rod. The driving external thread part cooperates with the connecting operating part with an internal thread. A connecting groove is formed between the operating part and the connecting boss.

[0020] The interior of the second expansion body has a conical channel, and the conical part is slidably disposed in the conical channel. The outer side wall of the second expansion body is provided with at least one second fastening boss. The cross-section of the operating part is adapted to the cross-section of the sleeve so that the operating part can be driven by the sleeve tool.

[0021] When the operating part is driven to rotate by the sleeve tool to move toward the conical part, at least a part of the operating part abuts against the second expansion body, so that the conical part slides a certain distance in the conical channel, so that at least one second fastening boss expands outward along the radial direction of the second expansion body, so that at least one second fastening boss bites against the inner wall of the first mounting hole of the first component, so that the connecting rod is locked in the first mounting hole of the first component through the second expansion body;

[0022] The internally threaded component is used to be installed in the second mounting hole of the second component. A connecting channel is provided on the outer side wall of the internally threaded component, and a connecting hole communicating with the connecting channel is provided on the top of the internally threaded component. The inner side wall of the connecting hole is provided with an internal thread that mates with a threaded fastener. At least a portion of the connecting groove is inserted into the position where the connecting channel and the connecting hole are connected through the mounting channel opened on the side wall of the second component. The threaded fastener is threadedly connected to the connecting hole, and one end of the threaded fastener is inserted into the connecting groove to prevent the end of the connecting rod with the connecting groove from being pulled out of the connecting channel.

[0023] In some embodiments, a limiting cavity is formed inside the second expansion body, and a limiting barrier is provided between the tapered portion and the driving external thread portion of the connecting rod, with the limiting barrier slidably disposed within the limiting cavity.

[0024] When the operating part is driven by the external sleeve tool to achieve rotation, the tapered part slides a certain distance in the tapered channel, and the limiting barrier abuts against one end of the limiting cavity to restrict the tapered part from continuing to slide, or the limiting barrier abuts against one end of the operating part to restrict the tapered part from continuing to slide; so that at least one second fastening boss expands outward along the radial direction of the second expansion body, so that at least one second fastening boss is engaged with the inner wall of the first mounting hole of the first member.

[0025] Based on the third aspect of the technical solution mentioned above, the four-in-one connector of the present invention has the following advantages compared with the prior art:

[0026] The connecting rod is fixedly provided with a driving external thread part between the connecting boss and the tapered part. The driving external thread part is connected to an operating part with an internal thread. When the external tool sleeve drives the operating part to rotate, the rotating operating part drives the driving external thread part to slide linearly, thereby driving the connecting rod to slide linearly. That is, after the tapered part slides linearly, the second fastening boss of the second expansion body and the first mounting hole of the first component lock together, thereby connecting the connecting rod and the first component. The operation is simple and convenient, which helps to improve assembly efficiency.

[0027] The connecting rod of this invention, by providing a driving external thread and an operating component between the connecting boss and the tapered portion, avoids the limitations of the prior art where the connecting rod relies solely on a slotted, Phillips, or hexagonal groove on the connecting boss to be driven by a screwdriver to rotate and lock (along with the expansion body) into the first mounting hole. This allows for a smaller diameter of the connecting boss, thereby reducing the diameter of the internal thread component. This results in a smaller diameter of the second mounting hole in the second component, making it difficult for the user to observe the internal thread component through the second mounting hole, improving its concealment on the second component, and further enhancing the aesthetics of the finished furniture. Furthermore, compared to the prior art where only a screwdriver is used to operate on the slotted, Phillips, or hexagonal groove on the connecting boss, the external tool sleeve provides a larger force application area and more stable force application on the operating component. This improves the stability of the connecting rod's assembly and disassembly on the first component, extends its service life, and increases economic efficiency.

[0028] In addition, the above three technical solutions also have the following inventive content:

[0029] In some embodiments, the cross-section of the operating part is quadrilateral, hexagonal, elliptical, oval, or petal-shaped.

[0030] In some embodiments, the diameter of the circumcircle formed by the outer contour of the operating part is larger than the diameter of the connecting boss.

[0031] In some implementations, the size of the connecting boss is 3-5mm.

[0032] In some implementations, the diameter of the internally threaded part is 5-7 mm.

[0033] In some implementations, the cross-section of the connecting boss is circular, elliptical, square, or hexagonal.

[0034] Furthermore, a fourth aspect of the present invention provides a piece of furniture, including a first component, a second component, and a four-in-one connector as described in the first aspect of the present invention above;

[0035] The first component has a first mounting hole, and the mounting part is inserted into the first mounting hole; when the operating part rotates a certain angle, the mounting part is engaged with the inner wall of the first mounting hole.

[0036] The second component has a second mounting hole at its bottom or top, and a mounting channel communicating with the second mounting hole is provided on the side wall of the second component. An internally threaded component is inserted into the second mounting hole and the connecting channel is connected to the mounting channel. At least a portion of the connecting groove passes through the mounting channel and is inserted at the position where the connecting channel and the connecting hole are connected, and the operating part is located in the mounting channel. A threaded fastener is threaded into the connecting hole, and one end of the threaded fastener is inserted into the connecting groove. The threaded fastener prevents the end of the connecting rod with the connecting groove from being pulled out of the connecting channel, so that the connecting rod is firmly connected to the internally threaded component and the threaded fastener, and the first component and the second component are connected to each other.

[0037] Furthermore, the fifth aspect of the present invention provides a piece of furniture, including a first component, a second component, and a four-in-one connector as described in the second aspect of the present invention above;

[0038] The first component has a first mounting hole, and the mounting part and the first expansion body are inserted into the first mounting hole; when the operating part rotates at a certain angle, the mounting part rotates within the first expansion body so that the first fastening boss is engaged with the inner wall of the first mounting hole.

[0039] The second component has a second mounting hole at its bottom or top, and a mounting channel communicating with the second mounting hole is provided on the side wall of the second component. An internally threaded component is inserted into the second mounting hole and the connecting channel is connected to the mounting channel. At least a portion of the connecting groove passes through the mounting channel and is inserted at the position where the connecting channel and the connecting hole are connected, and the operating part is located in the mounting channel. A threaded fastener is threaded into the connecting hole, and one end of the threaded fastener is inserted into the connecting groove. The threaded fastener prevents the end of the connecting rod with the connecting groove from being pulled out of the connecting channel, so that the connecting rod is firmly connected to the internally threaded component and the threaded fastener, and the first component and the second component are connected to each other.

[0040] Furthermore, a sixth aspect of the present invention provides a piece of furniture, comprising a first component, a second component, and a four-in-one connector as described in the third aspect of the present invention above;

[0041] The first component has a first mounting hole, and the conical part and the second expansion body are inserted into the first mounting hole; when the operating part rotates at a certain angle, the second fastening boss is engaged with the inner wall of the first mounting hole.

[0042] The second component has a second mounting hole at its bottom or top, and a mounting channel communicating with the second mounting hole is provided on the side wall of the second component. An internally threaded component is inserted into the second mounting hole and the connecting channel is connected to the mounting channel. At least a portion of the connecting groove passes through the mounting channel and is inserted at the position where the connecting channel and the connecting hole are connected, and the operating part is located in the mounting channel. A threaded fastener is threaded into the connecting hole, and one end of the threaded fastener is inserted into the connecting groove. The threaded fastener prevents the end of the connecting rod with the connecting groove from being pulled out of the connecting channel, so that the connecting rod is firmly connected to the internally threaded component and the threaded fastener, and the first component and the second component are connected to each other.

[0043] In addition, the technical solutions for the furniture in the above three aspects also have the following inventive content:

[0044] In some embodiments, the mounting channel includes a first-level sub-channel and a second-level sub-channel that are interconnected. The cross-sectional area of ​​the first-level sub-channel is adapted to the cross-sectional area of ​​the connecting boss, and the cross-sectional area of ​​the second-level sub-channel is adapted to the cross-sectional area of ​​the operating part.

[0045] In some embodiments, a decorative cover is also included, which is inserted into the second mounting hole to cover the opening of the second mounting hole.

[0046] Based on the technical solutions for the furniture in aspects four to six above, the advantages of the furniture of the present invention compared with the prior art are as follows:

[0047] This makes the diameter of the second mounting hole of the second component smaller, making it difficult for users to observe the internal threaded part through the second mounting hole, thus improving the concealment of the internal threaded part on the second component and further enhancing the aesthetics of the finished furniture. Attached Figure Description

[0048] Figure 1 This is a structural diagram of a three-in-one connector in the prior art;

[0049] Figure 2 This is a schematic diagram showing the disassembled components of the first component, the second component, and the three-in-one connector in the prior art;

[0050] Figure 3 This is a cross-sectional view of the first and second components connected using existing three-in-one connectors in the prior art;

[0051] Figure 4 This is a schematic diagram of the first structure of the connecting rod of the present invention;

[0052] Figure 5 This is a schematic diagram of a second structural embodiment of the connecting rod of the present invention;

[0053] Figure 6 yes Figure 5A structural diagram from another perspective;

[0054] Figure 7 This is a schematic diagram of the third structure of the connecting rod of the present invention;

[0055] Figure 8 This is a schematic diagram of the fourth structure of the connecting rod of the present invention;

[0056] Figure 9 This is a schematic diagram of the fifth structure of the connecting rod of the present invention;

[0057] Figure 10 This is a schematic diagram of the sixth structure of the connecting rod of the present invention;

[0058] Figure 11 This is a schematic diagram of the seventh structure of the connecting rod of the present invention;

[0059] Figure 12 This is a schematic diagram of the eighth structure of the connecting rod of the present invention;

[0060] Figure 13 This is a schematic diagram of the ninth structure of the connecting rod of the present invention;

[0061] Figure 14 This is a schematic diagram of the tenth structure of the connecting rod of the present invention;

[0062] Figure 15 This is a schematic diagram of the eleventh structure of the connecting rod of the present invention;

[0063] Figure 16 This is a schematic diagram of the twelfth structure of the connecting rod of the present invention;

[0064] Figure 17 yes Figure 16 A structural diagram from another perspective;

[0065] Figure 18 This is a schematic diagram of the thirteenth structure of the connecting rod of the present invention;

[0066] Figure 19 This is a cross-sectional view of the first expansion body of the present invention;

[0067] Figure 20 This is a structural diagram from another perspective after omitting the first inflated body;

[0068] Figure 21 This is a schematic diagram of the fourteenth structure of the connecting rod of the present invention;

[0069] Figure 22 This is a schematic diagram of the fifteenth structure of the connecting rod of the present invention;

[0070] Figure 23 yes Figure 22A diagram illustrating the breakdown;

[0071] Figure 24 This is a schematic diagram of the installation of the connecting rod and the first component of the present invention;

[0072] Figure 25 This is a schematic diagram of the sixteenth structure of the connecting rod of the present invention;

[0073] Figure 26 yes Figure 25 A sectional view along the middle AA;

[0074] Figure 27 yes Figure 25 A diagram illustrating the splitting process;

[0075] Figure 28 yes Figure 25 Another diagram showing the splitting process;

[0076] Figure 29 This is another structural schematic diagram of the connecting rod of the present invention;

[0077] Figure 30 This is a structural schematic diagram of the internal threaded component and threaded fastener of the present invention;

[0078] Figure 31 This is a split diagram of the furniture according to the present invention;

[0079] Figure 32 This is another exploded view of the furniture of the present invention;

[0080] Figure 33 yes Figure 32 A cross-sectional view in a connected state;

[0081] Figure 34 This is a cross-sectional view of the second component of the present invention.

[0082] In the picture,

[0083] 10. Pre-embedded nuts;

[0084] 20. Connecting rod; 201. Round head;

[0085] 30. Eccentric wheel;

[0086] 1. Connecting rod; 11. Connecting boss; 12. Mounting part; 122. First expansion body; 122a. First fastening boss; 122b. Mounting internal thread; 122c. Second limiting boss; 122d. First sub-component; 122e. Second sub-component; 124. Second expansion body; 124a. Conical channel; 124b. Second fastening boss; 124c. Limiting cavity; 124d. Third limiting boss; 124e. Third sub-component; 124f. Fourth sub-component; 125. Conical part; 13. Operating part; 14. Connecting groove; 15. First limiting boss; 16. Safety cylinder; 17. Drive external thread part; 18. Limiting barrier; 19. Reinforcing part; 110. Protective cylinder;

[0087] 3. Internal threaded component; 31. Connecting channel; 32. Connecting hole;

[0088] 4. Decorative cover;

[0089] 5. Threaded fasteners;

[0090] 6. First component; 61. First mounting hole;

[0091] 7. Second component; 71. Second mounting hole; 72. Mounting channel; 721. First-level sub-channel; 722. Second-level sub-channel;

[0092] U - First predetermined straight line direction; V - Second predetermined straight line direction; X - Third predetermined straight line direction; Y - Fourth predetermined straight line direction. Detailed Implementation

[0093] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0094] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship 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 limitations on this invention.

[0095] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0096] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0097] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0098] In existing technologies, such as Figures 1-3 As shown, the three-in-one connector consists of a pre-embedded nut 10, a connecting rod 20, and an eccentric wheel 30, mainly used to achieve an invisible connection between two furniture panels. One furniture panel is designated as the first component 6, and the other as the second component 7. The first component 6 and the second component 7 can have the same or different shapes or materials. The shape can be, for example, a plate-like, block-like, or columnar form, and the material can be wood, plastic, metal, or a polymer synthetic material, or a combination thereof; no limitation is made here.

[0099] When using the three-in-one connector, the first component 6 has a first mounting hole 61, and the second component 7 has a second mounting hole 71. A pre-embedded nut 10 is pre-embedded in the first mounting hole 61 of the first component 6, and the eccentric wheel 30 is installed in the second mounting hole 71 of the second component 7. The first end of the connecting rod 20 is firmly connected to the first component 6 via the pre-embedded nut 10, which serves as a reinforcement. The second end of the connecting rod 20 is inserted into the interior of the second component 7 and firmly connected to the eccentric wheel 30, thus achieving a concealed connection between the first component 6 and the second component 7 through the three-in-one connector. Furthermore, in the prior art, there are also two-in-one or four-in-one connectors. The two-in-one connector consists of a connecting rod 20 and an eccentric wheel 30. In use, the first end of the connecting rod 20 is directly installed in the first mounting hole 61 of the first component 6, and the second end of the connecting rod 20 is inserted into the interior of the second component 7 and firmly connected to the eccentric wheel 30. Therefore, compared to the three-in-one connector, the two-in-one connector omits the use of the pre-embedded nut 10, resulting in a relatively weak connection. For the connection method of the four-in-one connector, please refer to the existing technology in this field, which is omitted here.

[0100] Whether it's a three-in-one or four-in-one connector, the second end of the existing connecting rod 20 is provided with a round head 201 for connecting the eccentric wheel 30. The round head 201 has a slotted groove, a Phillips head groove, or a hexagonal groove (usually a Phillips head groove). A screwdriver is used to apply force to the Phillips head groove to drive the round head 201 to rotate, thereby locking the first end of the connecting rod 20 into the pre-embedded nut 10 or the first mounting hole 61 of the first component 6. Because the connecting rod 20 has a relatively large length, to ensure smooth rotation of the first end of the connecting rod 20 inside the pre-embedded nut 10 or the first mounting hole 61 of the first component 6, it is generally necessary to design a large diameter for the connecting rod 20. This ensures that the Phillips head groove of the round head 201 is large and deep enough to ensure that the force applied by the screwdriver to the round head 201 stably drives the connecting rod 20 to rotate. Furthermore, a larger diameter round head 201 ensures repeated screwdriver operation, allowing for multiple installations and removals of the connecting rod 20 from the first component 6.

[0101] Because the diameter of the round head 201 is relatively large, the diameter of the zinc alloy eccentric wheel 30 that mates with the round head 201 needs to be greater than 12mm. This results in a larger diameter of the second mounting hole 71 on the second component 7. The larger diameter of the second mounting hole 71 detracts from the aesthetics of the second component 7. At the same time, after the first component 6 and the second component 7 are connected, the user can easily observe the eccentric wheel 30 through the second mounting hole 71. This leads to lower concealment of existing three-in-one or two-in-one connectors and reduces the aesthetics of the furniture.

[0102] In addition, the use of a four-in-one connector between the first component 6 and the second component 7 also presents a technical problem: the diameter of the second mounting hole 71 is too large, which damages the aesthetics of the second component 7 and reduces the aesthetics of the furniture.

[0103] Example 1

[0104] Therefore, to address the technical problem of low concealment when connecting two furniture panels using existing four-in-one connectors, Embodiment 1 of this invention discloses a four-in-one connector, such as... Figure 31 As shown, the device includes a connecting rod 1, an internally threaded component 3, and a threaded fastener 5. In use, the connecting rod 1 is first securely connected to the first component 6. The internally threaded component 3 is installed in the second mounting hole 71 of the second component 7. One end of the connecting rod 1 is inserted into the interior of the second component 7 and securely connected to the internally threaded component 3 via the threaded fastener 5. This achieves a concealed connection between the first component 6 and the second component 7 through the connecting rod 1, the internally threaded component 3, and the threaded fastener 5. The structure of the internally threaded component 3 in Embodiment 1 of this invention is similar to that of internally threaded components in the prior art, but the difference lies in the fact that the diameter of the internally threaded component 3 is much smaller than that of internally threaded components in the prior art. This results in a smaller diameter second mounting hole 71, improving the aesthetics of the second component 7. Furthermore, the smaller diameter second mounting hole 71 makes it difficult for the user to observe the second connecting component 2, further enhancing the aesthetics of the furniture.

[0105] The specific structure of the connecting rod 1 in this embodiment 1 will be further explained below.

[0106] like Figures 4-16 As shown, in Embodiment 1 of the present invention, one end of the connecting rod 1 protrudes to form a connecting boss 11, and the other end of the connecting rod is provided with a mounting part 12. The mounting part 12 is used to lock in the first mounting hole 61 of the first component 6. The connecting rod is provided with an operating part 13 at a position between the connecting boss 11 and the mounting part 12. A connecting groove 14 is provided between the operating part 13 and the connecting boss 11. The operating part 13 is used to be driven by an external tool sleeve to drive the connecting rod p2 to rotate. The outer side wall of the operating part 13 has at least one operating plane, operating hole, operating protrusion, or operating groove. The cross-section of the operating part 13 is adapted to the cross-section of the sleeve.

[0107] Understandably, to ensure that the external tool can drive the operating part 13 to rotate, thereby causing the connecting rod 1 to rotate, the operating part 13 is integrally formed on the connecting rod. Therefore, the cross-section of the operating part 13 needs to be designed as non-circular or as a non-cylindrical structure. For example... Figures 4-8 As shown, the side wall of the operating part 13 has at least one operating surface. The number of operating surfaces can be one, two, four, or six, etc. A sleeve tool is used to drive the operating part 13 to rotate. For example... Figures 9-10As shown, the side wall of the operating part 13 has operating protrusions or operating grooves, and a sleeve tool is used to drive the operating part 13 to rotate. For example... Figures 11-18 , Figures 21-24 As shown, the cross-section of the operating part 13 is adapted to the cross-section of the socket. The external tool that drives the operating part 13 to rotate is a socket wrench, which is a commonly used tool in the field, such as a manual socket wrench of national standard GB T3390.1-2004, or a manual socket wrench or electric wrench of other national standards. The cross-section of the socket is non-circular, including but not limited to triangular, square, hexagonal, octagonal, elliptical, oval, or petal-shaped, so that when the socket wrench drives the socket to rotate, it can drive the operating part 13 to rotate synchronously with the socket, thereby causing the mounting part 12 of the connecting rod 1 to rotate and be firmly connected to the first component 6.

[0108] Based on the above solution, an operating part 13 is provided on the connecting rod. The operator uses an external tool to apply force to the operating part 13 to drive the mounting part 12 to connect with the first component 6. During operation, the force application area is large and the force application is stable, effectively improving the installation efficiency and disassembly stability of the connecting rod 1 on the first component 6. At the same time, providing an operating part 13 on the connecting rod avoids the drawback of only opening a groove on the connecting boss 11 for the screwdriver to apply force and drive the connecting boss 11 to rotate by applying force to the groove. This requires a larger diameter connecting boss 11 to ensure repeated operation of the screwdriver. As a result, the diameter of the second connecting member 2 can be reduced, and the diameter of the second mounting hole 71 of the second component 7 can be made smaller, improving the aesthetics of the second component 7. At the same time, it is difficult for the user to see the internal thread 3 through the smaller diameter second mounting hole 71, improving the concealment of the internal thread 3 on the second component 7, thereby improving the aesthetics of the furniture.

[0109] It should be further explained that, such as Figure 5 , Figures 11-16 , Figure 21 As shown, in Embodiment 1 of the present invention, the end of the operating part 13 may be connected to a cylindrical reinforcing part 19. For example, the reinforcing part 19 may be located between the operating part 13 and the mounting part 12; the reinforcing part 19 may also be located between the operating part 13 and the connecting groove 14. For another example, the cross-sectional area of ​​the reinforcing part 19 is the same as the cross-sectional area of ​​the operating part 13, thereby increasing the thickness of the connecting rod to improve the overall strength of the connecting rod 1.

[0110] Furthermore, the connecting rod is detachably connected to the internally threaded component 3 and the threaded fastener 5 of this embodiment 1 via the connecting boss 11. The cross-section of the connecting boss 11 is circular, elliptical, square, or hexagonal, etc. Embodiment 1 of the present invention does not limit the specific shape of the connecting boss 11. Generally, the cross-sectional area of ​​the connecting boss 11 is preferably circular, and the connecting groove 14 surrounds the outer side wall of the connecting rod in an annular groove shape. After the operator fixes the connecting rod 1 to the first component 6, it is not necessary to distinguish the installation direction of the connecting rod 1 to smoothly insert the connecting boss 11 into the internally threaded component 3, thereby improving the ease of assembly.

[0111] Furthermore, in some embodiments of this Example 1, such as Figure 6 As shown, the diameter D1 of the connecting boss 11 is 3-8 mm, for example, 3 mm, 4.5 mm, 5 mm, etc.

[0112] In some embodiments, to enable the external tool socket to more stably drive the operating part 13 to rotate and thus rotate the connecting rod 1, the cross-sectional area of ​​the operating part 13 is larger than the cross-sectional area of ​​the connecting boss 11, that is, the diameter of the circumscribed circle formed by the outer contour of the operating part 13 is larger than the diameter of the connecting boss 11. This provides a larger contact area between the operating part 13 and the external tool, thereby improving the assembly stability of the connecting rod 1 in the first component 6. Furthermore, when the external tool is a socket wrench, having a cross-sectional area of ​​the operating part 13 larger than the cross-sectional area of ​​the connecting boss 11, i.e., the diameter of the circumscribed circle formed by the outer contour of the operating part 13 being larger than the diameter of the connecting boss 11, ensures that the socket passes through the connecting boss 11 and is fitted onto the operating part 13, ensuring that the socket wrench can smoothly drive the operating part 13 to rotate.

[0113] Furthermore, the connection between the mounting part 12 and the first component 6 in Embodiment 1 of the present invention includes the following two methods, forming two connection methods for the two four-in-one connectors of the present invention: In the first type of four-in-one connector, the connecting rod 1 is used such that the mounting part 12 is directly placed in the first mounting hole 61 of the first component 6, and the mounting part 12 is locked with the inner wall of the first mounting hole 61 after rotating synchronously with the operating part 13; In the second type of four-in-one connector, the first expansion body 122 is also included. The mounting part 12 is disposed inside the first expansion body 122 and rotates relative to the first expansion body 122. In use, the first expansion body 122 is disposed in the first mounting hole 61 of the first component 6, and the mounting part 12 is locked with the inner wall of the first mounting hole 61 after rotating synchronously with the operating part 13.

[0114] The two connection methods between the mounting part 12 and the first component 6 will be described in detail below.

[0115] As a first connection method between the mounting part 12 and the first component 6, such as Figures 4-17 When the operating part 13 is driven by an external tool to rotate, the mounting part 12 rotates a certain angle inside the first mounting hole 61 of the first component 6 and then engages with the inner wall of the first mounting hole 61. The engagement method between the mounting part 12 and the inner wall of the first mounting hole 61 includes the following two types, the first being, for example... Figures 4-15 As shown, the mounting part 12 is cylindrical or conical, and its outer peripheral sidewall is provided with external threads. The outer diameter of the external threads of the mounting part 12 is larger than the diameter of the first mounting hole 61, so that when the mounting part 12 rotates in the first rotation direction (usually clockwise) within the first mounting hole 61, the mounting part 12 self-tappingly screws into the first mounting hole 61, causing the external threads of the mounting part 12 to mesh with the inner sidewall of the first mounting hole 61, thereby fixing the connecting rod 1 to the first component 6. When it is necessary to remove the connecting rod 1 from the first component 6, an external tool drives the operating part 13 to rotate in the opposite direction to the first rotation direction (usually counterclockwise), causing the mounting part 12 to unscrew from the first mounting hole 61. At this time, the inner sidewall of the first mounting hole 61 is provided with an internal thread structure that mates with the mounting part 12. When it is necessary to reinstall the connecting rod 1 onto the first component 6, the mounting part 12 and the internal threads of the first mounting hole 61 are threaded together, making the operation more convenient and effortless.

[0116] As a second type of clamping method between the mounting part 12 and the inner wall of the first mounting hole 61, such as Figures 16-17As shown, in the transverse viewing direction along the mounting portion 12, the distance between the two ends of the mounting portion 12 along the first predetermined straight direction U is greater than the distance between the two ends along the second predetermined straight direction V. The first predetermined straight direction U and the second predetermined straight direction V have a certain angle, such as 30°, 60°, or 90°, etc., which is not limited here. This allows the cross-section of the mounting portion 12 to be, for example, elliptical, oval, rectangular, or rhomboid, etc., and the shape and size of the first mounting hole 61 of the first component 6 to match the shape and size of the mounting portion 12, i.e., the cross-section of the first mounting hole 61 is elliptical, oval, rectangular, or rhomboid, etc., so that the mounting portion 12 can be smoothly inserted into the first mounting hole 61 through a clearance fit. When the external tool drives the operating part 13 to rotate a certain angle in the second rotation direction (usually clockwise), the mounting part 12 also rotates by the same angle within the first mounting hole 61, so that the two ends with the larger cross-sectional length of the mounting part 12 move to the two ends with the smaller cross-sectional length of the first mounting hole 61. At this time, the mounting part 12 and the first mounting hole 61 are in an interference fit, so that a clamping force is generated between the mounting part 12 and the inner wall of the first mounting hole 61, restricting the mounting part 12 from being pulled out of the first mounting hole 61. When it is necessary to remove the connecting rod 1 from the first component 6, the external tool drives the operating part 13 to rotate in the opposite direction to the second rotation direction (usually counterclockwise), so that the two ends with the larger cross-sectional length of the mounting part 12 move to the two ends with the larger cross-sectional length of the first mounting hole 61 (e.g., the position when the mounting part 12 is inserted into the first mounting hole 61), so that the mounting part 12 can be easily pulled out of the first mounting hole 61, thereby completing the separation of the connecting rod 1 from the first component 6.

[0117] Furthermore, in order to ensure that the mounting part 12 rotates synchronously with the operating part 13 and that the connecting rod 1 as a whole has greater structural strength, the connecting rod, the connecting boss 11, the operating part 13 and the mounting part 12 are integral metal parts, for example, made of iron, galvanized alloy or stainless steel.

[0118] In some embodiments of this Example 1, a first limiting boss 15 protrudes from the connecting rod between the mounting part 12 and the operating part 13. The cross-sectional area of ​​the first limiting boss 15 is larger than the cross-sectional area of ​​the first mounting hole 61, so that when the mounting part 12 can be fully inserted into the first mounting hole 61 and interlock with the inner wall of the first mounting hole 61, the first limiting boss 15 abuts against the surface of the first component 6, thereby achieving the purpose of installation positioning and improving assembly accuracy and convenience.

[0119] In some other embodiments of this embodiment 1, the cross-sectional area of ​​the operating part 13 is larger than the cross-sectional area of ​​the mounting part 12. At the same time, the cross-sectional area of ​​the operating part 13 is larger than the cross-sectional area of ​​the first mounting hole 61, so that when the mounting part 12 can be fully inserted into the first mounting hole 61 and interlocked with the inner wall of the first mounting hole 61, the end of the operating part 13 abuts against the surface of the first component 6. The operating part 13 is used to achieve the purpose of installation and positioning, thereby improving assembly accuracy and convenience.

[0120] As a second connection method between the mounting part 12 and the first component 6, namely the second four-in-one connector connection method of the present invention, such as Figures 18-23 It also includes a first expansion body 122, which is, for example, a hollow cylindrical structure. A mounting portion 12 is rotatably disposed inside the first expansion body 122. At least one first fastening boss 122a is provided on the outer wall of the first expansion body 122. The mounting portion 12 and the connecting rod are integrally formed, so that the mounting portion 12 also rotates synchronously with the operating portion 13. When the operating portion 13 is driven by an external tool to achieve rotation, the mounting portion 12 rotates a certain angle inside the first expansion body 122, causing at least one first fastening boss 122a to expand radially outward along the first expansion body 122, thereby causing at least one first fastening boss 122a to engage with the inner wall of the first mounting hole 61 of the first component 6.

[0121] The first expansion body 122 can be a single-piece molded part, or it can be formed by assembling multiple sub-parts, such as... Figures 22-23 As shown, the first expansion body 122 includes a first sub-component 122d and a second sub-component 122e. The first sub-component 122d has a first expansion groove, and the second sub-component 122e has a second expansion groove. When the first sub-component 122d and the second sub-component 122e are connected to each other and the first expansion groove and the second expansion groove are joined together, a hollow first expansion body 122 is formed. Furthermore, the first expansion body 122 and the mounting part 12 can be a separate structure, that is, the mounting part 12 is inserted into the interior of the first expansion body 122 through one end opening when in use. The first expansion body 122 and the mounting part 12 can also be a connecting structure. That is, before the first sub-part 122d and the second sub-part 122e are assembled, the mounting part 12 is first placed in the first expansion groove or the second expansion groove. Then the first sub-part 122d and the second sub-part 122e are assembled together and fixed by means of buckles or adhesives. One end of the first expansion groove or the second expansion groove is provided with a barrier to restrict the installation part 12 from being pulled out, so that the first expansion body 122 and the mounting part 12 are a connecting structure.

[0122] In Embodiment 1 of the present invention, the number of first fastening bosses 122a can be one or more. When there are multiple first fastening bosses 122a, they are arranged sequentially at intervals along the axial direction of the first expansion body 122. The first fastening bosses 122a and the first expansion body 122 are integrally formed. The first fastening bosses 122a and the first expansion body 122 can have a certain elasticity, for example, they are made of plastic. The first fastening bosses 122a and the first expansion body 122 can also be inelastic, for example, they are made of hard plastic or alloy. Further, in order to ensure that the first fastening bosses 122a can expand smoothly outward along the radial direction of the first expansion body 122, a deformation gap communicating with the interior of the first expansion body 122 is provided at the position of the first fastening bosses 122a. The number of deformation gaps can be one or more, for example, multiple deformation gaps are arranged sequentially at intervals along the circumference of the first expansion body 122. The deformation gap is used to divide the first expansion body 122 into multiple deformation parts. There is a deformation gap between two adjacent deformation parts so that after the mounting part 12 rotates a certain angle inside the first expansion body 122, it drives multiple deformation parts to expand radially outward, thereby improving the deformation capacity of the first expansion body 122.

[0123] When the connecting rod 1 is assembled with the first component 6, the first expansion body 122 is first inserted into the first mounting hole 61 of the first component 6 through clearance fit. In order to prevent the first expansion body 122 from being difficult to pull out of the first mounting hole 61 after it is completely placed in the first mounting hole 61, the outer peripheral sidewall of the first expansion body 122 is provided with a second limiting boss 122c close to the first fastening boss 122a. The cross-sectional area of ​​the second limiting boss 122c is larger than the cross-sectional area of ​​the first mounting hole 61, so that after the end of the first expansion body 122 with the first fastening boss 122a is inserted into the first mounting hole 61, the second limiting boss 122c abuts against the surface of the first component 6. The second limiting boss 122c serves the purpose of installation positioning and prevents the first expansion body 122 from being installed too deep in the first mounting hole 61.

[0124] Furthermore, in some embodiments of this Example 1, such as Figures 22-23 As shown, when the first expansion body 122 is formed by assembling multiple sub-components, to prevent the first expansion body 122 from dispersing during use, a first fastening boss 122a is provided at one end of the first expansion body 122, and a safety cylinder 16 is sleeved at the other end of the first expansion body 122. The diameter of the safety cylinder 16 is larger than that of the operating part 13 and smaller than that of the second limiting boss 122c, so that the safety cylinder 16 can smoothly pass through the operating part 13 and be sleeved at the end of the first expansion body 122. The second limiting boss 122c also serves to position the safety cylinder 16. This arrangement of the safety cylinder 16 surrounding multiple sub-components ensures the connection stability of the assembled first expansion body 122.

[0125] Furthermore, the mounting part 12 drives the first fastening boss 122a to expand radially outward along the first expansion body 122 in two ways, the first being, for example... Figures 18-19 , Figures 22-23 As shown, the mounting part 12 is cylindrical or conical, and the outer peripheral sidewall of the mounting part 12 is provided with external threads; the first expansion body 122 is provided with an internal mounting thread 122b that mates with the mounting part 12; wherein, along the direction in which the mounting part 12 is inserted into the first expansion body 122, the thread root diameter of the internal mounting thread 122b gradually decreases. When the external sleeve tool drives the operating part 13 to rotate a certain angle in the third rotation direction (usually clockwise), the mounting part 12 rotates synchronously with the operating part 13 inside the first expansion body 122. The rotational motion of the mounting part 12 is converted into linear motion so that the mounting part 12 gradually extends into the first expansion body 122. When the diameter of the mounting part 12 is larger than the thread root diameter of the mounting internal thread 122b, the mounting part 12 and the inside of the first expansion body 122 are in an interference fit. The mounting part 12 will drive the side wall of the first expansion body 122 to expand radially outward, thereby causing at least one first fastening boss 122a to expand and press against the inner side wall of the first mounting hole 61, increasing the sliding friction of the first expansion body 122 in the first mounting hole 61, thereby restricting the mounting part 12 from being pulled out of the first mounting hole 61, and thus realizing a firm connection between the connecting rod 1 and the first component 6. When it is necessary to remove the connecting rod 1 from the first component 6, the external tool drives the operating part 13 to rotate in the opposite direction to the third rotation direction (usually counterclockwise), so that the mounting part 12 gradually moves out of the first expansion body 122. At this time, the mounting part 12 and the first expansion body 122 gradually change from an interference fit to a clearance fit. The side wall of the first expansion body 122 gradually contracts inward along its radial direction, so that the first fastening boss 122a and the inner side wall of the first mounting hole 61 separate from each other, so that the first expansion body 122 can be pulled out from the first mounting hole 61, completing the separation of the connecting rod 1 from the first component 6.

[0126] As a second method, the mounting part 12 drives the first fastening boss 122a to expand radially outward along the first expansion body 122, such as Figures 20-21As shown, in the transverse viewing direction along the mounting part 12, the distance between the two ends of the mounting part 12 along the third predetermined straight direction X is greater than the distance between the two ends along the fourth predetermined straight direction Y. The third predetermined straight direction X and the fourth predetermined straight direction Y have a certain angle, such as 30°, 60°, or 90°, etc., which is not limited here. This allows the cross-section of the mounting part 12 to be, for example, elliptical, oval, rectangular, or rhomboid, etc., and the shape and size of the hollow portion inside the first expansion body 122 to match the shape and size of the mounting part 12, that is, the cross-section of the hollow portion inside the first expansion body 122 is elliptical, oval, rectangular, or rhomboid, etc., so that the mounting part 12 can be smoothly inserted into the interior of the first expansion body 122 through a clearance fit. When the external tool drives the operating part 13 to rotate a certain angle along the fourth rotation direction (usually clockwise), the mounting part 12 also rotates the same angle inside the first expansion body 122, so that the two ends with the larger length dimension of the cross-section of the mounting part 12 move to the two ends with the smaller length dimension of the cross-section of the hollow portion inside the first expansion body 122, such as... Figure 21 As shown, the mounting part 12 includes a protruding external thread. When the operating part is driven by the sleeve tool to achieve rotation, the mounting part 12 rotates a certain angle inside the expansion body 122, so that at least one external thread is embedded inside the expansion body. At this time, the mounting part 12 is in an interference fit inside the first expansion body 122. The mounting part 12 will drive the side wall of the first expansion body 122 to expand radially outward, thereby causing at least one first fastening boss 122a to expand and press against the inner side wall of the first mounting hole 61, increasing the sliding friction of the first expansion body 122 in the first mounting hole 61, thereby restricting the mounting part 12 from being pulled out of the first mounting hole 61, and thus achieving a firm connection between the connecting rod 1 and the first component 6. When it is necessary to remove the connecting rod 1 from the first component 6, the external tool drives the operating part 13 to rotate in the opposite direction to the fourth rotation direction (usually counterclockwise), so that the two ends with the larger cross-sectional length of the mounting part 12 are moved to the two ends with the larger cross-sectional length of the hollow part inside the first expansion body 122 (for example, the position where the mounting part 12 is just inserted into the first expansion body 122). At this time, the mounting part 12 is in clearance fit inside the first expansion body 122, and the side wall of the first expansion body 122 contracts radially inward, so that the first fastening boss 122a and the inner side wall of the first mounting hole 61 are separated from each other, so that the first expansion body 122 can be pulled out from the first mounting hole 61, completing the separation of the connecting rod 1 from the first component 6.

[0127] Furthermore, the connecting rod is an integrally formed rigid structure between the connecting boss 11 and the mounting part 12, so that the center line of the connecting boss 11 and the center line of the mounting part 12 are on the same straight line. In this case, the connecting rod 1 is usually suitable for the connection surfaces of the first component 6 and the second component 7 to be vertical or horizontal, respectively, and has a strong gravity bearing capacity.

[0128] Furthermore, based on the structure of the connecting rod 1 of the present invention described above, the specific structure of the internal threaded part 3 and the threaded fastener 5 that cooperate with the connecting rod 1 will be further described below.

[0129] A connecting channel 31 is provided on the outer side wall of the internally threaded component 3, and a connecting hole 32 communicating with the connecting channel 31 is provided on the top of the internally threaded component 3. At least a portion of the connecting groove is inserted at the position where the connecting channel 31 and the connecting hole 32 communicate. The threaded fastener 5 is threadedly connected to the connecting hole 32, and one end of the threaded fastener 5 is inserted into the connecting groove. In this embodiment of the invention, the outer peripheral side wall of the threaded fastener 5 has an external thread structure, such as a screw, bolt, or threaded rod in the prior art. The inner side wall of the connecting hole 32 has an internal thread structure that mates with the threaded fastener 5. By driving the threaded fastener 5 to rotate in the connecting hole 32, one end of the threaded fastener 5 is inserted into the connecting groove. The threaded fastener 5 restricts the end of the connecting rod 1 with the connecting groove from being pulled out of the connecting channel 31, thereby making the connecting rod 1 firmly connected to the internally threaded component 3 and the threaded fastener 5, and thus connecting the first component 6 and the second component 7.

[0130] It should be further noted that Embodiment 1 of the present invention does not limit the specific shape of the internal threaded component 3. For example, the internal threaded component 3 can be cylindrical, conical, or square prism. Specifically, in some embodiments, referring to the structure of the four-in-one connector in the prior art, the internal threaded component 3 of Embodiment 1 of the present invention has a cylindrical structure, with the two ends of the connecting channel 31 passing through the opposite sides of the internal threaded component 3, and the connecting hole 32 located at one end of the internal threaded component 3. Since the diameter of the connecting boss is 3-5mm, the diameter of the connecting channel 31 is reduced to reduce the size of the internal threaded component 3. Specifically, the diameter of the internal threaded component 3 can be less than 10mm, such as 5mm, 6mm, 7mm, etc. Compared with the four-in-one connector in the prior art, the diameter of the internal threaded component 3 of Embodiment 3 of the present invention is smaller, which effectively reduces the diameter of the second mounting hole 71 of the second component 7, thereby improving the aesthetics of the second component 7. In addition, it is difficult for the user to observe the internal threaded component 3 through the smaller diameter second mounting hole 71, which improves the concealment of the internal threaded component 3 on the second component 7, thereby improving the aesthetics of the furniture.

[0131] Based on the structure of the four-in-one connector of the present invention, an implicit connection between the first component 6 and the second component 7 of furniture can be achieved through the four-in-one connector of the present invention to form a type of furniture, such as... Figures 31-33 As shown, the furniture includes a first component 6, a second component 7, a connecting rod 1, an internally threaded component 3, and a threaded fastener 5. The first component 6 has a first mounting hole 61, into which a mounting part is inserted. When the operating part rotates a certain angle, the mounting part engages with the inner wall of the first mounting hole 61. The second component 7 has a second mounting hole 71 at its bottom, and a mounting channel 72 connecting to the second mounting hole 71 is formed on its side wall. The internally threaded component 3 is inserted into the second mounting hole 71, connecting the connecting channel 31 to the mounting channel 72. The connecting groove... A small portion passes through the mounting channel 72 to be inserted at the position where the connecting channel 31 and the connecting hole 32 are connected, and the operating part is located in the mounting channel 72; the threaded fastener 5 is threaded into the connecting hole 32, and one end of the threaded fastener 5 is inserted into the connecting groove. The threaded fastener 5 restricts the end of the connecting rod 1 with the connecting groove from being pulled out of the connecting channel 31, thereby making the connecting rod 1 firmly connected to the internal threaded part 3 and the threaded fastener 5, thereby making the first component 6 and the second component 7 interconnected; and the furniture is formed by interconnecting multiple first components 6 and second components 7.

[0132] In some embodiments, the furniture includes a first component 6, a second component 7, a connecting rod 1, a first expansion body 122, an internal threaded component 3, and a threaded fastener 5. The first component 6 has a first mounting hole 61, and the mounting part 12 is inserted into the first mounting hole 61 through the first expansion body 122. When the operating part rotates a certain angle, the mounting part 12 rotates and causes the first fastening boss 122a of the first expansion body 122 to engage with the inner wall of the first mounting hole 61. The bottom of the second component 7 has a second mounting hole 71, and the side wall of the second component 7 has a mounting channel 72 communicating with the second mounting hole 71. The internal threaded component 3 is inserted into the second mounting hole 71 and... The connecting channel 31 is connected to the mounting channel 72; at least a portion of the connecting groove 14 passes through the mounting channel 72 to be inserted into the position where the connecting channel 31 is connected to the connecting hole 32, and the operating part 13 is located in the mounting channel 72; the threaded fastener 5 is threaded into the connecting hole 32, and one end of the threaded fastener 5 is inserted into the connecting groove, thereby restricting the end of the connecting rod 1 with the connecting groove from being pulled out of the connecting channel 31 by the threaded fastener 5, so that the connecting rod 1 is firmly connected to the internal threaded part 3 and the threaded fastener 5, thereby connecting the first component 6 and the second component 7 to each other; and the furniture is formed by connecting multiple first components 6 and second components 7 to each other.

[0133] In some embodiments of this Example 1, such as Figure 34As shown, the mounting channel 72 includes a first-level sub-channel 721 and a second-level sub-channel 722 that are interconnected. The cross-sectional area of ​​the first-level sub-channel 721 is adapted to the cross-sectional area of ​​the connecting boss 11, and the cross-sectional area of ​​the second-level sub-channel 722 is adapted to the cross-sectional area of ​​the operating part 13. When the cross-sectional area of ​​the operating part 13 is larger than the cross-sectional area of ​​the connecting boss 11, the mounting channel 72 is a variable-diameter channel. The portion of the mounting channel 72 near the second mounting hole 71 (i.e., the cross-sectional area of ​​the first-level sub-channel 721) is smaller than the portion of the mounting channel 72 near its opening (i.e., the cross-sectional area of ​​the second-level sub-channel 722), so that the connecting rod 1 can be better fitted into the mounting channel 72, the load-bearing capacity of the second component 7 is stronger, and the connection between the first component 6 and the second component 7 is improved.

[0134] To further improve the concealment of the internal threaded component 3 and the threaded fastener 5 on the second component 7, such as Figure 31 As shown, the connecting component of Embodiment 1 of the present invention further includes a decorative cover 4, which is inserted into the second mounting hole 71 of the second component 7 to cover the opening of the second mounting hole 71. The shape and size of the decorative cover 4 are adapted to the shape and size of the second mounting hole 71 so that the decorative cover 4 can completely cover the internal threaded component 3 and the threaded fastener 5. The color or texture of the surface of the decorative cover 4 is the same as or similar to the color or texture of the surface of the second component 7, thereby improving the aesthetics of the finished furniture.

[0135] Example 2

[0136] The existing four-in-one connector technology has a low degree of concealment when connecting two furniture panels, such as... Figures 25-29 As shown, Embodiment 2 of the present invention discloses a connecting rod 1 and a second expansion body 124, which, together with the internal threaded part 3 and the threaded fastener 5 of Embodiment 2 above, form a four-in-one connector. The first component 6 and the second component 7 are implicitly connected through the four-in-one connector of Embodiment 2. The structure of the connecting rod 1 and the second expansion body 124 in Embodiment 2 of the present invention differs from that of the connecting rod 1 in Embodiment 2 above. The difference lies in that the connecting rod 1 in Embodiment 2 slides under the action of the external force-driven operating part 13, thereby firmly connecting the connecting rod 1 and the second expansion body 124 to the first component 6, thus allowing the connecting rod 1 to be installed on the first component 6.

[0137] Specifically, the specific structure of the connecting rod 1 and the second expansion body 124 in this embodiment 2 will be described in detail below.

[0138] like Figures 25-29As shown, one end of the connecting rod 1 protrudes to form a connecting boss 11, and the other end of the connecting rod 1 is provided with a tapered portion 125. The tapered portion 125 and the second expansion body 124 cooperate to lock in the first mounting hole 61 of the first component 6. The connecting rod is fixedly provided with a driving external thread portion 17 at the position between the connecting boss 11 and the second expansion body 124. The driving external thread portion 17 is connected to an operating portion 13 with an internal thread. A connecting groove 14 is formed between the operating portion 13 and the connecting boss 11. The operating portion 13 is used to be driven by an external tool to drive the connecting rod to slide. The outer side wall of the operating portion 13 has at least one operating plane, operating protrusion, or operating groove, or the cross-section of the operating portion 13 is adapted to the cross-section of the sleeve.

[0139] It should be noted that the structure of the connecting boss 11 in this embodiment 2 is exactly the same as that in the above embodiment 2. Its specific structure and working principle can be referred to the description of the above embodiment 2, which is omitted here. For example, the cross-section of the connecting boss 11 is circular, and the diameter of the connecting boss 11 is 3-5mm, specifically, for example, 3mm, 4.5mm, 5mm, etc.

[0140] The specific structure of the operating part 13 in this embodiment 2 is similar to that in the above embodiment 2, but the difference is that the operating part 13 in this embodiment 2 is relatively separate from the connecting rod, that is, the operating part 13 can be detached from the connecting rod. The connecting rod is fixedly provided with a driving external thread part 17 between the connecting boss 11 and the mounting part 12. For example, the driving external thread part 17 is integrally formed on the connecting rod. The operating part 13 is sleeved on the driving external thread part 17 and the internal thread of the operating part 13 and the driving external thread part 17 cooperate with each other to achieve a threaded connection. When the external sleeve tool drives the operating part 13 to rotate, the rotational motion of the operating part 13 is converted into the linear movement of the driving external thread by utilizing the principle of threaded connection, thereby causing the connecting rod to slide linearly.

[0141] Furthermore, the following section provides a detailed description of how a secure connection is achieved between the mounting part 12 and the first mounting hole 61 of the first component 6.

[0142] like Figures 25-29As shown, this embodiment 2 also includes a second expansion body 124. The interior of the second expansion body 124 has a conical channel 124a. The conical part 125, which is fixedly connected to the connecting rod 1, is slidably disposed in the conical channel 124a. The outer side wall of the second expansion body 124 is provided with at least one second fastening boss 124b. When the operating part 13 is driven by the external sleeve tool to achieve rotation, at least a part of the operating part 13 abuts against the expansion body 124, so that the conical part 125 slides a certain distance in the conical channel 124a, so that at least one second fastening boss 124b expands outward along the radial direction of the second expansion body 124, thereby causing at least one second fastening boss 124b to bite against the inner side wall of the first mounting hole 61 of the first component 6. It is understood that the cross-sectional area of ​​one end of the tapered portion 125 is larger than that of the other end, for example, it can be in the shape of a frustum or a truncated cone, or it can be a non-tapered protrusion, as long as at least one second fastening boss 124b can expand outward along the radial direction of the second expansion body 124 after the tapered portion 125 slides in the tapered channel 124a. There is no particular limitation on the shape of the tapered portion 125. The tapered portion 125 is preferably in the shape of a frustum, and the tapered portion 125 is integrally formed at one end of the connecting rod 1, for example, in which case the inner peripheral wall of the tapered channel 124a is also in the shape of a frustum.

[0143] In order for the tapered portion 125 to be smoothly placed within the tapered channel 124a of the second expansion body 124, the second expansion body 124 can be formed by assembling multiple sub-components, such as... Figure 25 , Figures 27-29As shown, the second expansion body 124 includes a third sub-component 124e and a fourth sub-component 124f. The third sub-component 124e has a first conical groove, and the fourth sub-component 124f has a second conical groove. When the third sub-component 124e and the fourth sub-component 124f are connected to each other, the first conical groove and the second conical groove are combined to form a conical channel 124a. Before the third sub-component 124e and the fourth sub-component 124f are connected, the conical portion 125 is pre-placed in the first conical groove or the second conical groove through a clearance fit. The end of the conical portion 125 with a larger cross-sectional area is located in the first conical groove or the end of the second conical groove with a larger cross-sectional area, and the end of the conical portion 125 with a smaller cross-sectional area is located in the first conical groove or the end of the second conical groove with a smaller cross-sectional area. This allows the conical portion 125 to be placed in the conical channel 124a and slide in the conical channel 124a before and after the third sub-component 124e and the fourth sub-component 124f are connected. Furthermore, the second expansion body 124 and the conical portion 125 can be separate structures. That is, during use, the conical portion 125 is installed inside the second expansion body 124, which is formed by assembling the third sub-component 124e and the fourth sub-component 124f, and then the second expansion body 124 is inserted into the first mounting hole 61 of the first component 6. Alternatively, the second expansion body 124 and the conical portion 125 can be connected structures. That is, after the third sub-component 124e and the fourth sub-component 124f are assembled, they are fixed by means of snaps or adhesives, thereby confining the conical portion 125 in the conical channel 124a, so that the second expansion body 124 and the conical portion 125 form a connected structure.

[0144] In Embodiment 2 of the present invention, the number of second fastening bosses 124b can be one or more. When there are multiple second fastening bosses 124b, they are arranged sequentially at intervals along the axial direction of the second expansion body 124. The second fastening bosses 124b and the second expansion body 124 are integrally formed. The second fastening bosses 124b and the second expansion body 124 can have a certain degree of elasticity, for example, they are made of plastic. The second fastening bosses 124b and the second expansion body 124 can also be inelastic, for example, they are made of hard plastic or alloy. Further, in order to ensure that the second fastening bosses 124b can expand smoothly outward along the radial direction of the second expansion body 124, a deformation gap communicating with the conical channel 124a is provided on the second expansion body 124 at the position of the second fastening bosses 124b. The number of deformation gaps can be one or more, and multiple deformation gaps are arranged sequentially at intervals along the circumference of the second expansion body 124. The deformation gap is used to divide the second expansion body 124 into multiple deformation parts, with a deformation gap between two adjacent deformation parts, so that the second expansion body 124 can expand outward along its radial direction more easily, thereby improving the deformation capacity of the second expansion body 124.

[0145] When the connecting rod 1 of Embodiment 2 of the present invention is installed on the first component 6, the second expansion body 124 is placed in the first mounting hole 61 of the first component 6 through a clearance fit. When the external tool drives the operating part 13 to rotate and move in the fifth direction (usually clockwise), i.e. towards the conical part 125, at least a part of the operating part 13 abuts against the expansion body 124. Through the threaded connection between the internal thread of the operating part 13 and the external thread of the driving part 17, a part of the connecting rod slides in a straight line, causing the conical part 125 to slide in the conical channel 124a, so that the cross-sectional area of ​​the conical part 125 is larger. One end gradually slides towards the end with the smaller cross-sectional area of ​​the tapered channel 124a, thereby gradually making the tapered part 125 and the inner peripheral wall of the tapered channel 124a an interference fit, so that the tapered part 125 abuts against the inner wall of the tapered channel 124a, thereby causing the outer peripheral wall of the second expansion body 124 to gradually expand radially outward, and then causing at least one second fastening boss 124b to also expand radially outward along the second expansion body 124 and bite into the inner side wall of the first mounting hole 61 of the first component 6, so that the connector 1 is firmly connected between the expansion body 124 and the first mounting hole 61 of the first component 6. When it is necessary to remove the connecting rod 1 from the first component 6, when the external tool drives the operating part 13 to rotate in the opposite direction to the fifth direction (usually counterclockwise), the end with the larger cross-sectional area of ​​the tapered part 125 gradually slides towards the end with the larger cross-sectional area of ​​the tapered channel 124a, so that the tapered part 125 and the inner peripheral wall of the tapered channel 124a gradually become a clearance fit, thereby causing the outer peripheral wall of the second expansion body 124 to gradually shrink radially inward, and then causing the second fastening boss 124b to also shrink radially inward along the second expansion body 124 and separate from the inner side wall of the first mounting hole 61 of the first component 6, so that the connecting member 1 and the expansion body 124 can be easily pulled out from the mounting hole, thereby separating the connecting rod 1 from the first component 6.

[0146] In some embodiments, when the connecting rod 1 is mounted on the first component 6, to prevent the tapered portion 125 (or the connecting rod 1) from sliding too far and causing the second expansion body 124 to over-expand and become damaged, such as... Figure 28As shown, in this embodiment 2, the second expansion body 124 forms a limiting cavity 124c inside. For example, the limiting cavity 124c is connected to the end with the smaller cross-sectional area of ​​the tapered channel 124a. Specifically, the third sub-component 124e has a first limiting groove, and the fourth sub-component 124f has a second limiting groove. When the third sub-component 124e and the fourth sub-component 124f are connected to each other, the first limiting groove and the second limiting groove are combined to form the limiting cavity 124c. The connecting rod has a limiting stop 18 between the tapered portion 125 and the driving external thread portion 17. The limiting stop 18 is integrally formed on the connecting rod, for example, so that the limiting stop 18 slides synchronously with the connecting rod. The limiting stop 18 is clearance-fitted in the limiting cavity 124c and can slide in the limiting cavity 124c.

[0147] When the operating part 13 is rotated by an external tool, the threaded connection between the internal thread of the operating part 13 and the external thread of the driving part 17 causes a part of the connecting rod to slide in a straight line, driving the tapered part 125 to slide in the tapered channel 124a. At the same time, the limiting barrier 18 slides in the limiting cavity 124c. When the limiting barrier 18 abuts against one end of the limiting cavity 124c to restrict the tapered part 125 from continuing to slide, the connecting rod is restricted from sliding as a whole. This avoids the second expansion body 124 from over-expanding and being damaged, making it difficult to remove the connecting rod 1 from the first component 6, and better positioning the distance between the connecting boss 11 and the first component 6.

[0148] In some embodiments, the end of the limiting cavity 124c facing the operating part 13 extends through the end of the second expansion body 124, so that when the limiting barrier 18 slides in the limiting cavity 124c and abuts against the end of the operating part 13, the operating part 13 restricts the tapered part 125 from continuing to slide, thereby restricting the overall sliding of the connecting rod. This avoids the second expansion body 124 from being damaged due to excessive expansion, thus preventing the connecting rod 1 from being difficult to remove from the first component 6, and better positioning the distance between the connecting boss 11 and the first component 6.

[0149] In this embodiment 2, the specific shape of the limiting barrier 18 is not limited. It can be any protrusion or protrusion or other shape that protrudes from the outer peripheral wall of the connecting rod. The shape of the limiting cavity 124c is adapted to the shape of the limiting barrier 18.

[0150] In some embodiments, to enable the external socket tool to more stably drive the operating part 13 to rotate and thus drive the connecting rod to slide linearly, the cross-sectional area of ​​the internal thread of the operating part 13 is larger than the cross-sectional area of ​​the connecting boss 11. This provides a larger contact area between the operating part 13 and the external tool, thereby improving the assembly stability of the connecting rod 1 in the first component 6. Furthermore, when the external tool is a socket wrench, the fact that the cross-sectional area of ​​the internal thread of the operating part 13 is larger than the cross-sectional area of ​​the connecting boss 11 ensures that the socket passes through the connecting boss 11 and is fitted onto the operating part 13, ensuring that the socket wrench smoothly drives the operating part 13 to rotate.

[0151] When the connecting rod 1 is assembled with the first component 6, the second expansion body 124 is first inserted into the first mounting hole 61 of the first component 6 through a clearance fit. To avoid the second expansion body 124 being difficult to pull out of the first mounting hole 61 after it is fully placed inside the first mounting hole 61, such as... Figures 25-26 , Figure 29 As shown, the outer peripheral sidewall of the second expansion body 124 is provided with a third limiting boss 124d near the second fastening boss 124b. The cross-sectional area of ​​the third limiting boss 124d is larger than the cross-sectional area of ​​the first mounting hole 61, so that after the end of the second expansion body 124 with the second fastening boss 124b is inserted into the first mounting hole 61, the third limiting boss 124d abuts against the surface of the first component 6. The third limiting boss 124d serves the purpose of installation positioning, preventing the second expansion body 124 from being installed too deeply in the first mounting hole 61.

[0152] Furthermore, in some embodiments of this Example 2, such as Figure 29 As shown, when the second expansion body 124 is formed by assembling multiple sub-components, to prevent the second expansion body 124 from dispersing during use, a second fastening boss 124b is provided at one end of the second expansion body 124, and a protective sleeve 110 is fitted onto the other end of the second expansion body 124. The diameter of the protective sleeve 110 is larger than the driving external thread portion 17 and smaller than the third limiting boss 124d, so that the protective sleeve 110 can smoothly pass through the driving external thread portion 17 and be fitted onto the end of the second expansion body 124 during assembly. The third limiting boss 124d also serves to position the protective sleeve 110 during installation. Then, the operating part 13 is threadedly connected to the driving external thread portion 17. This method of using the protective sleeve 110 to surround multiple sub-components ensures the connection stability of the constructed second expansion body 124.

[0153] Furthermore, the connecting rod is an integrally formed rigid structure between the connecting boss 11 and the tapered portion 125, so that the center line of the connecting boss 11 and the center line of the tapered portion 125 are on the same straight line. At this time, the connecting rod 1 is usually suitable for the connection surfaces of the first component 6 and the second component 7 to be vertical or horizontal, respectively, and has a strong gravity bearing capacity.

[0154] Based on the structure of the four-in-one connector of Embodiment 2 of the present invention, an implicit connection between the first component 6 and the second component 7 of furniture can be achieved through the four-in-one connector of the present invention to form a type of furniture, such as... Figure 32 As shown, the furniture includes a first component 6, a second component 7, a connecting rod 1, a second expansion body 124, an internally threaded component 3, and a threaded fastener 5. The first component 6 has a first mounting hole 61, into which the tapered portion 125 of the connecting rod 1 and the second expansion body 124 are inserted. When the operating part 13 rotates a certain angle, the second fastening boss 124b of the second expansion body 124 engages with the inner wall of the first mounting hole 61. The second component 7 has a second mounting hole 71 at its bottom, and a mounting channel 72 communicating with the second mounting hole 71 is formed on its side wall. The internally threaded component 3 is inserted into the second mounting hole 71, ensuring proper connection. The channel 31 is connected to the mounting channel 72; at least a portion of the connecting groove passes through the mounting channel 72 to be inserted at the position where the connecting channel 31 is connected to the connecting hole 32, and the operating part 13 is located in the mounting channel 72; the threaded fastener 5 is threaded into the connecting hole 32, and one end of the threaded fastener 5 is inserted into the connecting groove, and the threaded fastener 5 restricts the end of the connecting rod 1 with the connecting groove from being pulled out of the connecting channel 31, thereby making the connecting rod 1 firmly connected to the internal threaded part 3 and the threaded fastener 5, thereby making the first component 6 and the second component 7 interconnected; and the furniture is formed by interconnecting multiple first components 6 and second components 7.

[0155] In some embodiments of this Example 2, such as Figure 34 As shown, the mounting channel 72 includes a first-level sub-channel 721 and a second-level sub-channel 722 that are interconnected. The cross-sectional area of ​​the first-level sub-channel 721 is adapted to the cross-sectional area of ​​the connecting boss 11, and the cross-sectional area of ​​the second-level sub-channel 722 is adapted to the cross-sectional area of ​​the operating part 13. When the cross-sectional area of ​​the operating part 13 is larger than the cross-sectional area of ​​the connecting boss 11, the mounting channel 72 is a variable-diameter channel. The portion of the mounting channel 72 near the second mounting hole 71 (i.e., the cross-sectional area of ​​the first-level sub-channel 721) is smaller than the portion of the mounting channel 72 near its opening (i.e., the cross-sectional area of ​​the second-level sub-channel 722), so that the connecting rod 1 can be better fitted into the mounting channel 72, the load-bearing capacity of the second component 7 is stronger, and the connection between the first component 6 and the second component 7 is improved.

[0156] To further improve the concealment of the internal threaded component 3 and the threaded fastener 5 on the second component 7, a decorative cover 4 is also included. The decorative cover 4 is inserted into the second mounting hole 71 of the second component 7 to cover the opening of the second mounting hole 71. The shape and size of the decorative cover 4 are adapted to the shape and size of the second mounting hole 71 so that the decorative cover 4 can completely cover the internal threaded component 3 and the threaded fastener 5. The color or texture of the surface of the decorative cover 4 is the same as or similar to the color or texture of the surface of the second component 7, thereby improving the aesthetics of the finished furniture.

[0157] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0158] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A four-in-one connector, comprising a connecting rod, an internally threaded component, and a threaded fastener, for connecting a first component and a second component of furniture, characterized in that, One end of the connecting rod protrudes to form a connecting boss, and the other end of the connecting rod is provided with a mounting part. An operating part is fixedly provided between the connecting boss and the mounting part, and a connecting groove is formed between the operating part and the connecting boss. The cross-section of the operating part is adapted to the cross-section of the sleeve, and the operating part is driven by the sleeve tool to lock the mounting part in the first mounting hole of the first component; The internally threaded component is used to be disposed in the second mounting hole of the second component. A connecting channel is provided on the outer side wall of the internally threaded component, and a connecting hole communicating with the connecting channel is provided on the top of the internally threaded component. The inner side wall of the connecting hole is provided with an internal thread that mates with the threaded fastener. At least a portion of the connecting groove is inserted into the position where the connecting channel and the connecting hole are connected through the mounting channel opened on the side wall of the second component. The threaded fastener is threadedly connected to the connecting hole, and one end of the threaded fastener is inserted into the connecting groove to prevent the end of the connecting rod with the connecting groove from being pulled out of the connecting channel.

2. A four-in-one connector, comprising a connecting rod, a first expansion body, an internal threaded component, and a threaded fastener, for connecting a first component and a second component of furniture, wherein one end of the connecting rod protrudes to form a connecting boss, the other end of the connecting rod is provided with a mounting portion, the mounting portion being rotatably disposed within the first expansion body, and the outer side wall of the first expansion body is provided with at least one first fastening boss; characterized in that... The connecting rod is fixedly provided with an operating part between the connecting boss and the mounting part, and a connecting groove is formed between the operating part and the connecting boss; The cross-section of the operating part is adapted to the cross-section of the sleeve. The operating part is driven by the sleeve tool to rotate the mounting part inside the first expansion body by a certain angle, so that at least one first fastening boss expands outward along the radial direction of the first expansion body, thereby causing at least one first fastening boss to bite into the inner wall of the first mounting hole of the first component, so that the connecting rod is locked in the first mounting hole of the first component through the first expansion body. The internally threaded component is used to be disposed in the second mounting hole of the second component. A connecting channel is provided on the outer side wall of the internally threaded component, and a connecting hole communicating with the connecting channel is provided on the top of the internally threaded component. The inner side wall of the connecting hole is provided with an internal thread that mates with the threaded fastener. At least a portion of the connecting groove is inserted into the position where the connecting channel and the connecting hole are connected through the mounting channel opened on the side wall of the second component. The threaded fastener is threadedly connected to the connecting hole, and one end of the threaded fastener is inserted into the connecting groove to prevent the end of the connecting rod with the connecting groove from being pulled out of the connecting channel.

3. A four-in-one connector, comprising a connecting rod, a second expansion body, an internal threaded component, and a threaded fastener, for connecting a first component and a second component of furniture, characterized in that, One end of the connecting rod protrudes to form a connecting boss, and the other end of the connecting rod is provided with a tapered portion. A driving external thread portion is fixedly provided between the connecting boss and the tapered portion of the connecting rod. The driving external thread portion cooperates with the connecting operating portion with an internal thread. A connecting groove is formed between the operating portion and the connecting boss. The second expansion body has a conical channel formed inside, and the conical part is slidably disposed in the conical channel. The outer side wall of the second expansion body is provided with at least one second fastening boss. The cross-section of the operating part is adapted to the cross-section of the sleeve so that the operating part can be driven by the sleeve tool. When the operating part is driven to rotate by the sleeve tool to achieve rotation in the fifth direction, i.e. towards the conical part, at least a portion of the operating part abuts against the second expansion body, so that the conical part slides a certain distance in the conical channel, so that at least one second fastening boss expands outward along the radial direction of the second expansion body, so that at least one second fastening boss bites against the inner wall of the first mounting hole of the first component, so that the connecting rod is locked in the first mounting hole of the first component through the second expansion body; The internally threaded component is used to be disposed in the second mounting hole of the second component. A connecting channel is provided on the outer side wall of the internally threaded component, and a connecting hole communicating with the connecting channel is provided on the top of the internally threaded component. The inner side wall of the connecting hole is provided with an internal thread that mates with the threaded fastener. At least a portion of the connecting groove is inserted into the position where the connecting channel and the connecting hole are connected through the mounting channel opened on the side wall of the second component. The threaded fastener is threadedly connected to the connecting hole, and one end of the threaded fastener is inserted into the connecting groove to prevent the end of the connecting rod with the connecting groove from being pulled out of the connecting channel.

4. The four-in-one connector as described in claim 3, characterized in that, The second expansion body has a limiting cavity inside, and the connecting rod is provided with a limiting barrier between the tapered part and the driving external thread part, and the limiting barrier is slidably disposed in the limiting cavity; When the operating part is driven by an external sleeve tool to rotate, the tapered part slides a certain distance in the tapered channel, and the limiting barrier abuts against one end of the limiting cavity to restrict the tapered part from continuing to slide, or the limiting barrier abuts against one end of the operating part to restrict the tapered part from continuing to slide; so that at least one second fastening boss expands outward along the radial direction of the second expansion body, so that at least one second fastening boss bites against the inner wall of the first mounting hole of the first component.

5. The four-in-one connector as described in claim 2, characterized in that, The outer peripheral sidewall of the mounting part is provided with external threads. Along the transverse viewing direction of the mounting part, the distance between the two ends of the mounting part along the third predetermined straight line direction is greater than the distance between the two ends along the fourth predetermined straight line direction. The shape and size of the hollow part inside the first expansion body match the shape and size of the mounting part so that the mounting part can be smoothly inserted into the first expansion body through clearance fit. When the operating part is driven by the external tool sleeve to achieve rotation, the mounting part rotates a certain angle inside the first expansion body, so that at least one of the first fastening bosses expands outward along the radial direction of the first expansion body, thereby causing at least one of the first fastening bosses to engage with the inner wall of the first mounting hole of the first component.

6. The four-in-one connector as described in any one of claims 1-3, characterized in that, The cross-section of the operating part is quadrilateral, hexagonal, elliptical, oval, or petal-shaped.

7. The four-in-one connector as described in any one of claims 1-3, characterized in that, The diameter of the circumcircle formed by the outer contour of the operating part is larger than the diameter of the connecting boss.

8. The four-in-one connector as described in any one of claims 1-3, characterized in that, Its features are, The size of the connecting boss is 3-5mm.

9. The four-in-one connector as described in any one of claims 1-3, characterized in that, The diameter of the internally threaded part is 5-7mm.

10. The four-in-one connector as described in any one of claims 1-3, characterized in that, The cross-section of the connecting boss is circular, elliptical, square, or hexagonal.

11. The four-in-one connector as described in claim 3, characterized in that, The end of the operating part may be connected to a cylindrical reinforcing part, which is located between the operating part and the tapered part; or, the reinforcing part is located between the operating part and the connecting groove.

12. The four-in-one connector as described in claim 3, characterized in that, Includes a protective cylinder, the second expansion body is formed by assembling multiple sub-components, the protective cylinder is located at the other end of the second expansion body relative to the second fastening boss, and the diameter of the protective cylinder is larger than the outer diameter of the drive external thread portion.

13. The four-in-one connector as described in claim 3, characterized in that, The connecting rod is an integrally formed rigid structure between the connecting boss and the tapered part 1, and the center line of the connecting boss and the center line of the tapered part 1 are on the same straight line.

14. A type of furniture, characterized in that, Includes a first component, a second component, and the four-in-one connector as described in claim 1; The first component has a first mounting hole, and the mounting part is inserted into the first mounting hole; when the operating part rotates at a certain angle, the mounting part is engaged with the inner wall of the first mounting hole. The second component has a second mounting hole at its bottom or top, and a mounting channel communicating with the second mounting hole is formed on the side wall of the second component. The internally threaded component is inserted into the second mounting hole, and the connecting channel is connected to the mounting channel. At least a portion of the connecting groove passes through the mounting channel and is inserted at the position where the connecting channel communicates with the connecting hole, and the operating part is located in the mounting channel. The threaded fastener is threaded into the connecting hole, and one end of the threaded fastener is inserted into the connecting groove. The threaded fastener restricts the end of the connecting rod with the connecting groove from being pulled out of the connecting channel, so that the connecting rod is firmly connected to the internally threaded component and the threaded fastener, and the first component and the second component are connected to each other.

15. A type of furniture, characterized in that, Includes a first component, a second component, and the four-in-one connector as described in claim 2; The first component has a first mounting hole, and the mounting part and the first expansion body are inserted into the first mounting hole; when the operating part rotates at a certain angle, the mounting part rotates within the first expansion body so that the first fastening boss bites into the inner wall of the first mounting hole. The second component has a second mounting hole at its bottom or top, and a mounting channel communicating with the second mounting hole is formed on the side wall of the second component. The internally threaded component is inserted into the second mounting hole, and the connecting channel is connected to the mounting channel. At least a portion of the connecting groove passes through the mounting channel and is inserted at the position where the connecting channel communicates with the connecting hole, and the operating part is located in the mounting channel. The threaded fastener is threaded into the connecting hole, and one end of the threaded fastener is inserted into the connecting groove. The threaded fastener restricts the end of the connecting rod with the connecting groove from being pulled out of the connecting channel, so that the connecting rod is firmly connected to the internally threaded component and the threaded fastener, and the first component and the second component are connected to each other.

16. A type of furniture, characterized in that, Includes the first component, the second component, and the four-in-one connector as described in any one of claims 11-13; The first component has a first mounting hole, and the tapered part and the second expansion body are inserted into the first mounting hole; when the operating part rotates at a certain angle, the second fastening boss bites into the inner wall of the first mounting hole; The second component has a second mounting hole at its bottom or top, and a mounting channel communicating with the second mounting hole is formed on the side wall of the second component. The internally threaded component is inserted into the second mounting hole, and the connecting channel is connected to the mounting channel. At least a portion of the connecting groove passes through the mounting channel and is inserted at the position where the connecting channel communicates with the connecting hole, and the operating part is located in the mounting channel. The threaded fastener is threaded into the connecting hole, and one end of the threaded fastener is inserted into the connecting groove. The threaded fastener restricts the end of the connecting rod with the connecting groove from being pulled out of the connecting channel, so that the connecting rod is firmly connected to the internally threaded component and the threaded fastener, and the first component and the second component are connected to each other.

17. The furniture as described in any one of claims 14-16, characterized in that, The installation channel includes a first-level sub-channel and a second-level sub-channel that are interconnected. The cross-sectional area of ​​the first-level sub-channel is adapted to the cross-sectional area of ​​the connecting boss, and the cross-sectional area of ​​the second-level sub-channel is adapted to the cross-sectional area of ​​the operating part.

18. The furniture as described in any one of claims 14-16, characterized in that, It also includes a decorative cover, which is inserted into the second mounting hole to cover the opening of the second mounting hole.

Images