A connection assembly, connection system and method of installation

Abstract

The application discloses a connecting assembly, a connecting system and a mounting method, which are used for connecting a first component and a second component, and the connecting assembly comprises a first connecting piece, a second connecting piece and a threaded fastener. One end of the first connecting piece is provided with a first connecting channel, and the outer side wall of the first connecting piece is provided with a first connecting hole which is communicated with the first connecting channel. The outer side wall of the first connecting piece is provided with at least one fastening undercut. One end of the second connecting piece is formed with a connecting groove, and the one end of the second connecting piece is arranged in the first connecting channel and at least a part of the connecting groove is arranged at a position where the first connecting channel is communicated with the first connecting hole. The outer peripheral side wall of the threaded fastener is provided with an external thread structure, the threaded fastener is threadedly connected in the first connecting hole, and the threaded fastener is slid in the first connecting hole so that one end of the threaded fastener is inserted into the connecting groove. After the furniture product is connected according to the connecting assembly of the application, the invisibility can be improved, and the overall aesthetic appearance can be improved.

Description

Technical Field

[0001] This invention discloses a connecting component, a connecting system, and an installation method for connecting a first component and a second component, particularly for connecting furniture components. Background Technology

[0002] Currently, with the continuous improvement of people's aesthetic awareness, concealed connectors are increasingly being used to achieve hidden connections between two furniture panels or two metal components, thereby improving the aesthetics of furniture or equipment. Among these, four-in-one connectors are widely used for connecting two furniture panels. For example... Figure 1 As shown, the existing four-in-one connector mainly consists of an expansion nut 5', a connecting rod 2', a fixing pin 3', and a threaded fastener 4'. The first end of the connecting rod 2' has an external thread structure, and the second end has a locking groove 21'. The circumferential sidewall of the fixing pin 3' has pin holes 31' penetrating its opposite sides, and the end has a locking hole 32' with internal threads communicating with the pin holes 31'. In use, as... Figures 2-3 As shown, a mounting channel 101' is first opened on one side of the first component 10', and a first mounting hole 102' communicating with the mounting channel 101' is opened on the top of the first component 10'. A second mounting hole 201' is opened on the surface of the second component 20'. Then, the fixing pin 3' is inserted into the first mounting hole 102' and the pin hole 31' is made to communicate with the mounting channel 101'. The expansion nut 5' is pre-embedded in the second mounting hole 201' of the second component 20'. Then, the first end of the connecting rod 2' is rotatably inserted into the expansion nut. The first component 10' and the second component 20' are locked together by the expansion nut 5'. The second end of the connecting rod 2' is inserted into the mounting channel 101' and the locking groove 21' is placed inside the pin hole 31'. Finally, the threaded fastener 4' is inserted into the locking hole 32' and rotated in the locking hole 32' so that one end of the threaded fastener 4' is smoothly inserted into the locking groove 21'. The threaded fastener 4' restricts the second end of the connecting rod 2' from being pulled out of the mounting channel 101', thereby realizing the mutual connection between the first component 10' and the second component 20'.

[0003] Because the first component 10' and the second component 20' are connected by a four-in-one connector, they have the characteristics of strong connection, high load-bearing capacity, and easy disassembly. Therefore, they are widely used in the implicit connection between two furniture panels in finished furniture products. However, in the prior art, in order to enable the first end of the connecting rod 2' to rotate in the expansion nut 5' for a firm connection, the second end of the connecting rod 2' is a round head structure, and a slotted groove, cross groove, or hexagonal groove is opened on the end face of the round head. A screwdriver or hex wrench is used to rotate the round head so that the first end of the connecting rod 2' can rotate in the expansion nut 5'. In order to ensure that the round head of the connecting rod 2' can be operated multiple times to achieve a better disassembly and assembly effect, the diameter of the round head of the existing connecting rod 2' is designed to be large, which results in a large hole diameter of the pin hole 31' of the fixing pin 3', and thus a large diameter of the fixing pin 3'. Typically, the diameter of the end of the fixing pin 3' is more than 10mm. This requires the opening of a large first mounting hole 102' on the first component 10'. Users can easily see the fixing pin 3' through the large first mounting hole 102', which results in low concealment of the connection between the first component 10' and the second component 20', reducing the aesthetics of the finished furniture. Summary of the Invention

[0004] To address the technical problem of low concealment of the fixing pins of the four-in-one connector in the finished furniture in the prior art, the first aspect of the present invention provides a connecting assembly, comprising:

[0005] The first connector has a first connecting channel at one end, a first connecting hole communicating with the first connecting channel on the outer side wall of the first connector, and at least one fastening barb on the outer side wall of the first connector.

[0006] A second connector, one end of which has a connecting groove, is inserted into the first connecting channel, with at least a portion of the connecting groove positioned at a location where the first connecting channel communicates with the first connecting hole; and

[0007] A threaded fastener, wherein the outer peripheral sidewall of the threaded fastener is provided with an external thread structure, the threaded fastener is threadedly connected to the first connecting hole, and the threaded fastener slides in the first connecting hole so that one end of the threaded fastener is inserted into the connecting groove.

[0008] In some embodiments, the threaded fastener is inserted into one end of the connecting groove in a pointed shape, and the threaded fastener is threadedly connected to the inner wall of the first connecting hole by means of self-tapping.

[0009] In some embodiments, the inner wall of the first connecting hole is integrally formed with threads, and the threaded fastener is threadedly connected to the first connecting hole by engaging with the threads.

[0010] In some embodiments, the thread teeth are made of metal.

[0011] In some embodiments, the connecting assembly further includes a first metal block disposed inside the first connecting hole, the first metal block having a first threaded hole, and the threaded fastener being threadedly connected to the first connecting hole by engaging with the first threaded hole.

[0012] In some embodiments, the first metal block is interference-fitted into the interior of the first connecting hole.

[0013] In some embodiments, the inner sidewall of the first connecting hole protrudes to form a protrusion, the protrusion being disposed at a distance from each other at the communication point between the first connecting channel and the first connecting hole; the first metal block is located between the protrusion and the communication point between the first connecting hole and the first connecting channel.

[0014] In some embodiments, the outer side wall of the first connector has an insertion hole that communicates with the first connection hole, and the first metal block is inserted through the insertion hole between the protrusion and the first connection hole and the first connection channel.

[0015] In some embodiments, the connecting assembly further includes a second metal block disposed at the opening of the first connecting hole, the second metal block having a second threaded hole communicating with the first connecting hole; the threaded fastener is threadedly connected to the first connecting hole by engaging with the second threaded hole.

[0016] In some embodiments, the first connector has a receiving groove formed along the outer periphery of the opening of the first connecting hole for receiving the second metal block.

[0017] Based on the connecting component of the first aspect of the present invention described above, its advantages compared with the prior art are as follows:

[0018] During the connection of the first component and the second component using the connecting assembly of the present invention, an installation channel is first provided on one side of the first component, a first installation hole communicating with the installation channel is provided on the top of the first component, and a second installation hole is provided on the surface of the second component. Then, the first connector is inserted into the installation channel and the positions of the first connecting hole and the first installation hole are aligned so that the first connecting hole and the first installation hole are connected. The end of the second connector away from the connecting groove can be locked in the second installation hole by a threaded connection or an expansion nut. Finally, the end of the second connector with the connecting groove is inserted into the first connecting channel and the connecting groove is positioned at the position where the first connecting channel and the first connecting hole are connected. Then, the threaded fastener is driven to rotate in the first connecting hole from the first installation hole so that the threaded fastener slides in the first connecting hole and one end of the threaded fastener is inserted into the connecting groove. The threaded fastener and the connecting groove cooperate with each other to restrict the relative separation of the first connector and the second connector, thereby making the first component and the second component firmly connected to each other.

[0019] Compared with the existing four-in-one connector, the connecting component of the present invention omits the use of fixing pins, so that the diameter of the first mounting hole can be designed according to the diameter of the threaded fastener. Since the diameter of the threaded fastener is small, the diameter of the first mounting hole is also small. By reducing the diameter of the first mounting hole, the invisibility of the connecting component of the present invention within the first and second components is improved, thereby improving the aesthetics of the finished furniture.

[0020] Furthermore, the threaded fastener of the present invention can be pre-installed in the first connecting hole so that the diameter of the first mounting hole is small enough to allow only the tool for rotating the threaded fastener to pass through; then, a tool such as a screwdriver is used to drive the threaded fastener to rotate in the first connecting hole after passing through the first mounting hole. Compared with the existing four-in-one connector, which requires the fixing pin to be positioned in the first mounting hole during assembly, the operation is more convenient and faster, effectively shortening the assembly time of the connecting components on the first and second components and improving the assembly efficiency between the first and second components.

[0021] To address the technical problem of low concealment of the fixing pins in the four-in-one connector on finished furniture in the prior art, a second aspect of the present invention provides a connecting assembly, comprising:

[0022] The first connector has a first connecting channel at one end, a first connecting hole communicating with the first connecting channel on the outer side wall of the first connector, and at least one fastening barb on the outer side wall of the first connector.

[0023] The second connector has a connecting groove formed at one end;

[0024] A third connector, wherein a third connecting channel is formed on the outer side wall of the third connector, and a third connecting hole is formed at one end of the third connector communicating with the third connecting channel. The third connector is inserted into the first connecting hole, thereby connecting the third connecting channel with the first connecting channel. One end of the second connector passes through the first connecting channel, and at least a portion of the connecting groove is positioned at the location where the third connecting channel communicates with the third connecting hole.

[0025] A threaded fastener, wherein the outer peripheral sidewall of the threaded fastener is provided with an external thread structure, the threaded fastener is threadedly connected to the third connecting hole, and the threaded fastener slides in the third connecting hole so that one end of the threaded fastener is inserted into the connecting groove.

[0026] In some embodiments, the outer wall of the third connector has at least one positioning plane, positioning protrusion, or positioning groove; or, the cross-section of the third connector is elliptical or oval.

[0027] The inner wall shape of the first connecting hole matches the outer wall shape of the third connector.

[0028] In some embodiments, the two ends of the third connecting channel pass through the opposite sides of the third connector, one end of the second connector passes through the third connecting channel and extends out of the third connector, and at least a portion of the connecting groove is located at the position where the third connecting channel communicates with the third connecting hole.

[0029] Based on the connecting component of the second aspect of the present invention described above, its advantages compared with the prior art are as follows:

[0030] During the connection of the first component and the second component using the connecting assembly of the present invention, an installation channel is first provided on one side of the first component, a first installation hole communicating with the installation channel is provided on the top of the first component, and a second installation hole is provided on the surface of the second component. Then, the first connector is inserted into the installation channel and the positions of the first connecting hole and the first installation hole are aligned so that the first connecting hole and the first installation hole are connected. The end of the second connector away from the connecting groove can be locked in the second installation hole by a threaded connection or an expansion nut. Finally, the end of the second connector with the connecting groove is inserted into the first connecting channel and the connecting groove is positioned at the position where the third connecting channel and the third connecting hole are connected. Then, the threaded fastener is driven to rotate in the third connecting hole from the first installation hole so that the threaded fastener slides in the third connecting hole and one end of the threaded fastener is inserted into the connecting groove. The threaded fastener and the connecting groove cooperate with each other to restrict the relative separation of the first connector and the second connector, thereby making the first component and the second component firmly connected to each other.

[0031] Compared with the existing four-in-one connectors, the connecting assembly of the present invention allows the third connector to be pre-installed in the first connecting hole and connect the third connecting channel with the first connecting channel. This avoids the hassle of positioning the fixing pin in the first mounting hole during assembly, as is present in the existing four-in-one connectors. The operation is more convenient and faster, effectively shortening the assembly time of the connecting assembly on the first and second components. Furthermore, when opening the first mounting hole on the first component, the present invention does not require design based on the diameter of the third connector (i.e., the diameter of the fixing pin in the prior art). It only needs to ensure that the diameter of the first mounting hole is large enough for threaded fasteners to pass through and be inserted into the third connecting hole. This significantly reduces the diameter of the first mounting hole, improving the concealment of the connecting assembly within the first and second components, thereby enhancing the aesthetics of the finished furniture.

[0032] Furthermore, the threaded fastener of the present invention can be pre-installed in the third connecting hole so that the diameter of the first mounting hole is small enough to allow only the tool for rotating the threaded fastener to pass through; then, a tool such as a screwdriver is used to drive the threaded fastener to rotate in the third connecting hole after passing through the first mounting hole. Compared with the prior art four-in-one connector, which requires the threaded fastener to be inserted from the outside of the first component into the third connecting hole during assembly, the operation is more convenient and faster, effectively shortening the assembly time of the connecting assembly on the first and second components and improving the assembly efficiency between the first and second components.

[0033] Furthermore, based on the connection components described in the first and second aspects of the present invention,

[0034] In some embodiments, the first connector is a metal part or a rigid plastic part.

[0035] In some embodiments, the first connector includes a first connector body and a mounting post integrally formed with the first connector body. The first connector body includes a first connecting end and a first mounting end opposite to each other. The first connecting channel is located at the first connecting end, and the mounting post is located at the first mounting end.

[0036] The first connecting hole is located on the outer side wall of the first connector body, and the outer side wall of the first connector body and / or the outer side wall of the mounting post are provided with the fastening back teeth.

[0037] In some embodiments, along the viewing direction from the first connecting end to the first mounting end, the outline of the outer wall of the first connector body is an axisymmetric figure and has at least two first axes of symmetry, and the minimum distance between the intersection point of the straight line containing the central axis of the mounting post and the at least two first axes of symmetry is greater than zero.

[0038] In some embodiments, the first connector body is cylindrical, and the central axis of the mounting post is not on the same straight line as the central axis of the first connector body.

[0039] In some embodiments, the outer side wall of the first connector includes a first side and a second side opposite to each other, the first connecting hole is formed on the first side, and the threaded fastener is inserted into the first connecting hole from the first side of the first connector;

[0040] Let L1 be the distance between the central axis of the first connecting channel and the first side of the first connector, and let L2 be the distance between the central axis of the first connecting channel and the second side of the first connector; wherein L1 and L2 satisfy: L1>L2.

[0041] In some embodiments, the minimum distance between the second side of the first connector and the inner wall of the first connecting channel is set to L3; wherein L3 satisfies: 0.3mm≤L3≤6mm.

[0042] In some embodiments, the outer side wall of the first connector body is provided with a positioning boss.

[0043] In some embodiments, a corrective tilt portion is formed at the location where the inner sidewall of the connecting groove connects to the bottom of the connecting groove.

[0044] In some embodiments, the second connector has a second connecting end and a second mounting end opposite to each other, the connecting groove being located on the second connecting end, and the second mounting end being for detachable connection to the second component.

[0045] In some embodiments, a recess is formed on the outer peripheral wall of the second connecting end, and the connecting groove is formed on the recess.

[0046] In some embodiments, the outer wall of the second mounting end is formed with a first mounting external thread.

[0047] In some embodiments, the connecting assembly further includes an expansion nut, wherein the second mounting end is rotatably disposed inside the expansion nut for driving the outer peripheral wall of the expansion nut to expand outward, thereby connecting the second mounting end to the second component through the expansion nut.

[0048] In some embodiments, the second connector has an operating part fixedly provided between the second connecting end and the second mounting end. The operating part has at least one first operating plane, a first operating hole, a first operating protrusion, or a first operating groove. Alternatively, the cross-section of the operating part is adapted to the cross-section of the sleeve.

[0049] In some embodiments, the connecting assembly further includes an expansion body having a tapered channel formed inside;

[0050] The second mounting end has a tapered portion that slides within the tapered channel; the second connector has a second external mounting thread fixed between the second connecting end and the second mounting end, and the second external mounting thread is threadedly connected to a rotating body with an internal thread; the outer wall of the rotating body has at least one second operating plane, a second operating hole, a second operating protrusion, or a second operating groove, or the cross-section of the rotating body is adapted to the cross-section of the sleeve;

[0051] When the rotating body is driven to rotate by an external tool, the tapered part slides a certain distance in the tapered channel to cause the outer peripheral wall of the expansion body to expand outward, thereby connecting the second mounting end to the second component through the expansion body.

[0052] In some embodiments, the second connector has a hinge between the second connecting end and the second mounting end, and the second connecting end and the second mounting end rotate relative to each other through the hinge.

[0053] In order to solve the technical problem of low concealment of the fixing pin of the four-in-one connector on the finished furniture in the prior art, the third aspect of the present invention provides a connection, including a first component, a second component and the connection component described in the first or second aspect of the present invention.

[0054] The first component has an installation channel on one side to accommodate the first connector, and a first installation hole on the top of the first component that communicates with the first connection hole.

[0055] The second component has a second mounting hole on one side, and the end of the second connector away from the connecting groove is installed in the second mounting hole.

[0056] In some embodiments, the installation channel includes a first-level sub-channel and a second-level sub-channel that are interconnected. The cross-section of the first-level sub-channel is an axisymmetric figure and has at least two second axes of symmetry. The minimum distance between the intersection point of the straight line containing the central axis of the second-level sub-channel and the at least two second axes of symmetry is greater than zero.

[0057] In some embodiments, the cross-sections of the first-level sub-channel and the second-level sub-channel are both circular, and the central axis of the first-level sub-channel and the central axis of the second-level sub-channel are not on the same straight line.

[0058] To address the technical problem of low concealment of the fixing pins of the four-in-one connector on finished furniture in the prior art, a fourth aspect of the present invention provides an installation method using the connector assembly described in the first or second aspect of the present invention, comprising the following steps:

[0059] An installation channel is machined on one side of the first component, and a first installation hole communicating with the installation channel is machined on the top of the first component;

[0060] The end of the second connector away from the connecting groove is installed on one side of the second component;

[0061] The first connector is inserted into the mounting channel and the first connecting hole is connected to the first mounting hole. The threaded fastener is driven to rotate from the first mounting hole so that one end of the threaded fastener is inserted into the connecting groove to restrict the second connector from sliding in the first connecting channel, thereby connecting the first component and the second component to each other.

[0062] In some embodiments, the installation channel includes a first-level sub-channel and a second-level sub-channel that are interconnected. The cross-section of the first-level sub-channel is an axisymmetric figure and has at least two second axes of symmetry. The minimum distance between the intersection point of the straight line containing the central axis of the second-level sub-channel and the at least two second axes of symmetry is greater than zero.

[0063] In some embodiments, the cross-sections of the first-level sub-channel and the second-level sub-channel are both circular, and the central axis of the first-level sub-channel and the central axis of the second-level sub-channel are not on the same straight line.

[0064] In some embodiments, the threaded fastener is inserted through a first mounting hole and one end of the threaded fastener is inserted into the connecting groove. Attached Figure Description

[0065] Figure 1 This is a structural diagram of a four-in-one connector in the prior art;

[0066] Figure 2 This is a schematic diagram showing the disassembled four-in-one connector, the first component, and the second component in the prior art;

[0067] Figure 3 This is a cross-sectional view of the first and second components connected by a four-in-one connector in the prior art.

[0068] Figure 4 This is a schematic diagram of the first type of connection of the connection component in Embodiment 1 of the present invention;

[0069] Figure 5 yes Figure 4 Exploded view;

[0070] Figure 6 yes Figure 4 A cross-sectional view showing that the threaded fastener is not inserted into the connecting groove;

[0071] Figure 7 yes Figure 4 A cross-sectional view showing a threaded fastener inserted into a connecting groove;

[0072] Figure 8 This is a second split schematic diagram of the connecting component in Embodiment 1 of the present invention;

[0073] Figure 9 yes Figure 8 A cross-sectional view of the connected state, showing the threaded fastener inserted into the connecting groove;

[0074] Figure 10 This is a third split schematic diagram of the connecting component in Embodiment 1 of the present invention;

[0075] Figure 11 yes Figure 10 A diagram from another perspective;

[0076] Figure 12 yes Figure 10 A cross-sectional view of the connected state, showing that the threaded fastener is not inserted into the connection groove;

[0077] Figure 13 yes Figure 10 A cross-sectional view of the connected state, showing the threaded fastener inserted into the connecting groove;

[0078] Figure 14 This is a fourth split schematic diagram of the connecting component in Embodiment 1 of the present invention;

[0079] Figure 15 yes Figure 14 A cross-sectional view of the connected state, showing that the threaded fastener is not inserted into the connection groove;

[0080] Figure 16 yes Figure 14 A cross-sectional view of the connected state, showing the threaded fastener inserted into the connecting groove;

[0081] Figure 17 This is a fifth connection diagram of the connection component in Embodiment 1 of the present invention;

[0082] Figure 18 yes Figure 17 A diagram illustrating the breakdown;

[0083] Figure 19 yes Figure 17 A cross-sectional view showing a threaded fastener inserted into a connecting groove;

[0084] Figure 20 This is a sixth split diagram of the connecting component in Embodiment 1 of the present invention;

[0085] Figure 21 This is a seventh split diagram of the connecting component in Embodiment 1 of the present invention;

[0086] Figure 22 yes Figure 21 A cross-sectional view of the connected state, showing the threaded fastener inserted into the connecting groove;

[0087] Figure 23 This is an eighth split diagram of the connecting component in Embodiment 1 of the present invention;

[0088] Figure 24 yes Figure 23 A cross-sectional view of the connected state, showing the threaded fastener inserted into the connecting groove;

[0089] Figure 25 This is a ninth connection diagram of the connection component in Embodiment 1 of the present invention;

[0090] Figure 26 yes Figure 25 A diagram illustrating the breakdown;

[0091] Figure 27 yes Figure 25 A cross-sectional view showing a threaded fastener inserted into a connecting groove;

[0092] Figure 28 This is a tenth connection diagram of the connection component in Embodiment 1 of the present invention;

[0093] Figure 29 yes Figure 28 A diagram illustrating the breakdown;

[0094] Figure 30 yes Figure 28 A cross-sectional view showing that the threaded fastener is not inserted into the connecting groove;

[0095] Figure 31 yes Figure 28 A cross-sectional view showing a threaded fastener inserted into a connecting groove;

[0096] Figure 32 This is an eleventh connection diagram of the connection component in Embodiment 1 of the present invention;

[0097] Figure 33 This is a schematic diagram of the first structure of the first connector in Embodiment 1 of the present invention;

[0098] Figure 34 yes Figure 33 A half-section view;

[0099] Figure 35 yes Figure 33 Rear view;

[0100] Figure 36 yes Figure 33 Front view;

[0101] Figure 37 This is a schematic diagram of a second structure of the first connector in Embodiment 1 of the present invention;

[0102] Figure 38 yes Figure 37 Rear view;

[0103] Figure 39 yes Figure 37 Front view;

[0104] Figure 40 This is a schematic diagram of the third structure of the first connector in Embodiment 1 of the present invention;

[0105] Figure 41 This is a schematic diagram of the fourth structure of the first connector in Embodiment 1 of the present invention;

[0106] Figure 42 This is a schematic diagram of the first structure of the second connector in Embodiment 1 of the present invention;

[0107] Figure 43 yes Figure 42 A half-section view;

[0108] Figure 44 This is a schematic diagram of a second structure of the second connector in Embodiment 1 of the present invention;

[0109] Figure 45 This is a schematic diagram of the third structure of the second connector in Embodiment 1 of the present invention;

[0110] Figure 46 This is a schematic diagram of the fourth structure of the second connector in Embodiment 1 of the present invention;

[0111] Figure 47 This is a schematic diagram of the fifth structure of the second connector in Embodiment 1 of the present invention;

[0112] Figure 48 This is a schematic diagram of the sixth structure of the second connector in Embodiment 1 of the present invention;

[0113] Figure 49 This is a schematic diagram of the seventh structure of the second connector in Embodiment 1 of the present invention;

[0114] Figure 50 This is an eighth structural schematic diagram of the second connector in Embodiment 1 of the present invention;

[0115] Figure 51This is a ninth structural schematic diagram of the second connector in Embodiment 1 of the present invention;

[0116] Figure 52 This is a schematic diagram of the tenth structure of the second connector in Embodiment 1 of the present invention;

[0117] Figure 53 This is an eleventh structural schematic diagram of the second connector in Embodiment 1 of the present invention;

[0118] Figure 54 This is a schematic diagram of the twelfth structure of the second connector in Embodiment 1 of the present invention;

[0119] Figure 55 This is a schematic diagram of the structure of the second connector and the expansion nut in Embodiment 1 of the present invention;

[0120] Figure 56 This is a schematic diagram showing the connection of the second connector, the expansion body, and the rotating body in Embodiment 1 of the present invention;

[0121] Figure 57 yes Figure 56 A diagram illustrating the breakdown;

[0122] Figure 58 yes Figure 56 A half-section diagram;

[0123] Figure 59 This is a schematic diagram of the structure of the first component of Embodiment 1 of the present invention;

[0124] Figure 60 yes Figure 59 A sectional view along the middle AA;

[0125] Figure 61 This is a schematic diagram showing the separation of the first connector and the first component in Embodiment 1 of the present invention;

[0126] Figure 62 yes Figure 61 A schematic diagram showing the first connector being installed on the first component.

[0127] Figure 63 yes Figure 62 A sectional view along the middle edge BB;

[0128] Figure 64 This is a schematic diagram of the first split of the connection system according to Embodiment 1 of the present invention;

[0129] Figure 65 yes Figure 64 A cross-sectional view in the connected state;

[0130] Figure 66 This is a schematic diagram showing the disassembled first and third connecting members of Embodiment 2 of the present invention;

[0131] Figure 67 This is a cross-sectional view of the third connector pre-installed inside the first connector in Embodiment 2 of the present invention;

[0132] Figure 68 This is a schematic diagram of the first disassembly of the connecting component in Embodiment 2 of the present invention;

[0133] Figure 69 yes Figure 68 A cross-sectional view in the connected state;

[0134] Figure 70 This is a second split schematic diagram of the connecting component in Embodiment 2 of the present invention;

[0135] Figure 71 yes Figure 70 A cross-sectional view in the connected state;

[0136] Figure 72 This is a third split schematic diagram of the connecting component in Embodiment 2 of the present invention;

[0137] Figure 73 yes Figure 72 A cross-sectional view in the connected state;

[0138] Figure 74 This is a fourth split schematic diagram of the connecting component in Embodiment 2 of the present invention;

[0139] Figure 75 This is a schematic diagram of the first structure of the third connector in Embodiment 2 of the present invention;

[0140] Figure 76 yes Figure 75 A structural diagram from another perspective;

[0141] Figure 77 This is a schematic diagram of the second structure of the third connector in Embodiment 2 of the present invention;

[0142] Figure 78 This is a schematic diagram of the third structure of the third connector in Embodiment 2 of the present invention;

[0143] Figure 79 This is a schematic diagram of the fourth structure of the third connector in Embodiment 2 of the present invention;

[0144] Figure 80 This is a schematic diagram of the fifth structure of the third connector in Embodiment 2 of the present invention;

[0145] Figure 81 This is a schematic diagram of the sixth structure of the third connector in Embodiment 2 of the present invention;

[0146] Figure 82This is a schematic diagram of the structure of the third connector pre-installed inside the first connector and then installed on the first component in Embodiment 2 of the present invention;

[0147] Figure 83 yes Figure 82 A sectional view along the center CC;

[0148] Figure 84 This is a split schematic diagram of the connection system of Embodiment 2 of the present invention;

[0149] Figure 85 yes Figure 84 A cross-sectional view in the connected state;

[0150] Figure 86 This is a schematic diagram of the first structure of the second connector in Embodiment 3 of the present invention;

[0151] Figure 87 yes Figure 86 A diagram illustrating the breakdown;

[0152] Figure 88 This is a schematic diagram of a second structure of the second connector in Embodiment 3 of the present invention;

[0153] Figure 89 This is a schematic diagram of the third structure of the second connector in Embodiment 3 of the present invention;

[0154] Figure 90 yes Figure 89 A diagram illustrating the breakdown;

[0155] Figure 91 This is a schematic diagram showing the connection between the first component and the second component in Embodiment 3 of the present invention;

[0156] Figure 92 This is a schematic diagram of the structure of the first connector in Embodiment 3 of the present invention;

[0157] Figure 93 This is a schematic diagram showing a disassembled connection system according to Embodiment 3 of the present invention;

[0158] Figure 94 yes Figure 93 A cross-sectional view in the connected state;

[0159] Figure 95 This is another exploded schematic diagram of the connection system in Embodiment 3 of the present invention;

[0160] Figure 96 yes Figure 95 Sectional view in the connected state. Detailed Implementation

[0161] 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.

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] like Figures 1-3As shown, in the prior art, the four-in-one connector consists of an expansion nut 5', a connecting rod 2', a fixing pin 3', and a threaded fastener 4', mainly used to achieve an invisible connection between two furniture panels. In this embodiment of the invention, one furniture panel is designated as the first component 10', and the other as the second component 20'. The first component 10' and the second component 20' 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.

[0167] Furthermore, the specific structure of the existing four-in-one connector is described in detail below. The expansion nut 5' has a certain elastic deformation capability, with an internal thread structure and protrusions on its outer wall. The first end of the connecting rod 2' has an external thread structure that mates with the interior of the expansion nut 5', and the second end of the connecting rod 2' has a locking groove 21'. The fixing pin 3' is, for example, cylindrical, with pin holes 31' penetrating its opposite sides on its circumferential sidewalls, and a locking hole 32' with internal threads communicating with the pin holes 31' at one end. The outer circumferential sidewall of the threaded fastener 4' has an external thread structure; the threaded fastener 4' is, for example, a screw or bolt, so that the threaded fastener 4' can rotate within the locking hole 32'.

[0168] When the first component 10' and the second component 20' are connected to each other using the existing four-in-one connector, a mounting channel 101' is first opened on one side of the first component 10', and a first mounting hole 102' communicating with the mounting channel 101' is opened on the top (or bottom) of the first component 10'. A second mounting hole 201' is opened on the surface of the second component 20'. Then, the fixing pin 3' is inserted into the first mounting hole 102' and the pin hole 31' is made to communicate with the mounting channel 101'. The expansion nut 5' is pre-embedded in the second mounting hole 201' of the second component 20' with clearance fit. Next, the first end of the connecting rod 2' is rotatably inserted into the interior of the expansion nut 5' and locked together with the second component 20' by the expansion nut 5'. The second end of the connecting rod 2' is inserted into the mounting channel 101' and the locking groove 21' is placed inside the pin hole 31'. Finally, the threaded fastener 4' is inserted into the locking hole 32' and rotated in the locking hole 32' so that one end of the threaded fastener 4' is smoothly inserted into the locking groove 21'. The threaded fastener 4' restricts the second end of the connecting rod 2' from being pulled out of the mounting channel 101', thereby realizing the mutual connection between the first component 10' and the second component 20'.

[0169] To allow the first end of the connecting rod 2' to rotate inside the expansion nut 5', a slotted, Phillips, or hexagonal groove (usually a Phillips) is typically formed on the second end face of the connecting rod 2'. A screwdriver is used to drive the connecting rod 2' to rotate through the Phillips groove, thus allowing the first end of the connecting rod 2' to rotate inside the expansion nut 5' and securely connect to the second component 20' through the expansion nut 5'. However, since the first end of the connecting rod 2' is inserted into the expansion nut 5' and the second end is inserted into the installation channel 101', the connecting rod 2' must have a sufficient length, typically greater than 30mm. To achieve better disassembly and assembly, the second end of the connecting rod 2' is rounded with a large diameter, allowing for a deeper Phillips groove to be formed on the rounded end. This ensures the stability of the screwdriver's force on the rounded end and the rotation of the connecting rod 2', as well as the ability to repeatedly operate the rounded end to disassemble and assemble the connecting rod 2' on the first component 10'.

[0170] However, the rounded end of the second end of the connecting rod 2' directly results in a larger diameter of the pin hole 31', which in turn makes the diameter of the fixing pin 3' larger. Typically, the diameter of the fixing pin 3' is more than 10mm. This requires a larger diameter of the first mounting hole 102' in the first component 10'. Users can easily observe the fixing pin 3' through the larger diameter first mounting hole 102', resulting in lower concealment at the connection between the first component 10' and the second component 20', thus reducing the aesthetics of the finished furniture.

[0171] Example 1

[0172] Therefore, to address the technical problem of the low concealment of the fixing pins of the four-in-one connector in the finished furniture in existing technologies, such as... Figures 4-65 As shown, Embodiment 1 of the present invention provides a connecting component so that the first component 10 and the second component 20 are connected invisibly through the connecting component of Embodiment 1 of the present invention, and the slots opened on the first component 10 or the second component 20 are small in size, making it difficult for users to observe the connecting component from the outside of the first component 10 or the second component 20, thereby improving the aesthetics of the finished furniture.

[0173] Specifically, such as Figures 4-32As shown, the connecting component of Embodiment 1 of the present invention includes a first connecting member 1, a second connecting member 2, and a threaded fastener 4. In use, the first connecting member 1 is first installed on the first component 10 and the second connecting member 2 is installed on the second component 20. Then, a portion of the second connecting member 2 is inserted into the interior of the first connecting member 1. Next, the threaded fastener 4 is inserted into the interior of the first connecting member 1 and restricts the second connecting member 2 from being pulled out of the interior of the first connecting member 1, thereby connecting the first connecting member 1 and the second connecting member 2 to each other, and thus achieving a firm connection between the first component 10 and the second component 20.

[0174] The specific structures of the first connector 1, the second connector 2, and the threaded fastener 4 of the connecting assembly in Embodiment 1 of the present invention and the principle of their interconnection are described in detail below.

[0175] like Figures 33-41 As shown, in Embodiment 1 of the present invention, one end of the first connector 1 is provided with a first connecting channel 113, the outer side wall of the first connector 1 is provided with a first connecting hole 114 communicating with the first connecting channel 113, and the outer side wall of the first connector 1 is provided with at least one fastening barb 13. Figures 42-58 As shown, in Embodiment 1 of the present invention, one end of the second connector 2 has a connecting groove 23. For example... Figures 4-32 As shown, the outer peripheral sidewall of the threaded fastener 4 in Embodiment 1 of the present invention has an external thread structure, and the threaded fastener 4 is threadedly connected to the first connecting hole 114. Figures 4-32 , Figures 61-65 As shown, in use, the first connector 1 is first installed inside the first component 10, and the end of the second connector 2 away from the connecting groove 23 is installed on the second component 20. Then, the end of the second connector 2 with the connecting groove 23 is inserted into the first connecting channel 113, and at least a portion of the connecting groove 23 is positioned at the position where the first connecting channel 113 communicates with the first connecting hole 114. While driving the threaded fastener 4 to rotate in the first connecting hole 114, the threaded fastener 4 slides in the first connecting hole 114, so that one end of the threaded fastener 4 can be inserted into the connecting groove 23. The threaded fastener 4 and the connecting groove 23 cooperate with each other to prevent the end of the second connector 2 with the connecting groove 23 from being pulled out of the first connecting channel 113, thereby connecting the first connector 1 and the second connector 2, and thus firmly connecting the first component 10 and the second component 20.

[0176] In this embodiment of the invention, the specific shape and material of the first connector 1 are not limited. For example, the first connector 1 can be cylindrical, conical, square prism, trapezoidal, or have an axisymmetric or non-axisymmetric cross-section. The material of the first connector 1 can be metal, hard plastic, wood, or other materials with high hardness. The first connector 1 has strong physical or chemical stability, a stable structure, and a long service life. Preferably, the first connector 1 in this embodiment of the invention is preferably a metal or hard plastic part. The metal material is, for example, stainless steel, zinc alloy, or other hard alloys, which has strong load-bearing capacity and strong physical and chemical stability. More preferably, the first connector 1 in this embodiment of the invention is a hard plastic part, which can be manufactured into a single piece by injection molding, reducing processing steps and improving production efficiency.

[0177] Furthermore, in Embodiment 1 of the present invention, the first connecting member 1 is locked inside the first component 10 by fastening buckles 13, specifically as follows: Figures 59-60 As shown, an installation channel 101 is first provided on the side wall of the first component 10. The structure and size of the installation channel 101 are adapted to the structure and size of the first connector 1. During the process of inserting the first connector 1 into the installation channel 101, the fastening barb 13 bends inward toward the outer side wall of the first connector 1. After it stops, the fastening barb 13 forms a large deformation tension on the inner side wall of the installation channel 101, which increases the sliding friction between the first connector 1 and the inner side wall of the installation channel 101. This makes it difficult to pull out the first connector 1 after it is inserted into the installation channel 101, and makes the first connector 1 firmly locked inside the first component 10. Meanwhile, in order to enable the operator to drive the threaded fastener 4 to rotate in the first connecting hole 114 from the outside of the first component 10, a first mounting hole 102 communicating with the first connecting hole 114 is provided on the top (or bottom) of the first component 10. The first mounting hole 102 is connected to the mounting channel 101. That is, before the first connector 1 is inserted into the mounting channel 101, the mounting channel 101 is first opened on the side wall of the first component 10 by means of machining, for example, and the first mounting hole 102 communicating with the mounting channel 101 is opened on the top. Then, after the first connector 1 is inserted into the mounting channel 101, the position of the first connecting hole 114 is aligned with the position of the first mounting hole 102 and connected.

[0178] To ensure the secure connection of the first connector 1 to the first component 10, the fastening barb 13 of Embodiment 1 of the present invention is integrally formed with the first connector 1. For example, the fastening barb 13 is formed on the outer side wall of the first connector 1 by machining or injection molding. The number of fastening barbs 13 is one or more, for example, multiple fastening barbs 13 are arranged sequentially and spaced between the two ends of the first connector 1. Furthermore, to improve the connection stability of the first connector 1 to the first component 10, fastening barbs 13 are provided on the opposite outer side walls of the first connector 1, so that after the first connector 1 is inserted into the first component 10, the fastening barbs 13 on both sides respectively bite against the inner side wall of the mounting channel 101, thereby improving the stability and secureness of the first connector 1 within the mounting channel 101.

[0179] Furthermore, the threaded fastener 4 in Embodiment 1 of the present invention is the threaded fastener 4 in the four-in-one connector in the prior art, such as a screw, bolt or threaded rod, and preferably a countersunk screw or bolt. The material of the threaded fastener 4 can be metal or hard plastic, preferably metal, which has greater hardness to prevent the first connector 1 from being damaged by a large tensile force, so that the end of the second connector 2 with the connecting groove 23 can be easily pulled out from the first connecting channel 113.

[0180] Based on the above solution, compared with the existing four-in-one connector, the connecting component of Embodiment 1 of the present invention omits the use of fixing pins, so that the diameter of the first mounting hole 102 can be designed according to the diameter of the threaded fastener 4 or the diameter of the tool used to rotate the threaded fastener 4. Since the diameter of the threaded fastener 4 or the diameter of the tool used to rotate the threaded fastener 4 is small, the diameter of the first mounting hole 102 is also small. By reducing the diameter of the first mounting hole 102, the concealment of the connecting component of Embodiment 1 of the present invention inside the first component 10 and the second component 20 is improved, thereby improving the aesthetics of the finished furniture. Furthermore, the threaded fastener 4 of Embodiment 1 of the present invention can be pre-installed in the first connecting hole 114 so that the diameter of the first mounting hole 102 is small enough to allow only the tool for rotating the threaded fastener 4 to pass through; then, a screwdriver or other tool is used to drive the threaded fastener 4 to rotate in the first connecting hole 114 after passing through the first mounting hole 102. Compared with the existing four-in-one connector, which requires the fixing pin to be positioned in the first mounting hole 102 during assembly, the operation is more convenient and faster, effectively shortening the assembly time of the connecting components on the first component 10 and the second component 20, and improving the assembly efficiency between the first component 10 and the second component 20.

[0181] Furthermore, after the first component 10 and the second component 20 are connected using the connecting component of Embodiment 1 of the present invention, when the first component 10 and the second component 20 are separated by tension, the tension borne by the first connector 1 mainly acts between the fastening buckle 13 and the inner wall of the mounting channel 101. Since the biting area between the fastening buckle 13 and the mounting channel 101 is large and the biting effect is strong, the first connector 1 has a stronger tensile load capacity within the mounting channel 101. Compared with the first component 10 and the second component 20 being connected by the existing four-in-one connector, the tensile load capacity between the first component 10 and the second component 20 is greatly improved, thereby improving the connection stability between the first component 10 and the second component 20.

[0182] Furthermore, the threaded fastener 4 is directly or indirectly connected to the first connecting hole 114 via a threaded connection, thereby driving the threaded fastener 4 to rotate and slide within the first connecting hole 114, thus allowing one end of the threaded fastener 4 to be inserted into the connecting groove 23. The specific details of the threaded connection of the threaded fastener 4 within the first connecting hole 114 are described below.

[0183] like Figures 4-7 As shown, in the first embodiment where the threaded fastener 4 is directly threaded to the first connecting hole 114, the threaded fastener 4 is inserted into the connecting groove 23 at one end in a sharp shape, and the threaded fastener 4 is threaded to the inner wall of the first connecting hole 114 by means of self-tapping. Specifically, the threaded fastener 4 is, for example, a screw, and the hardness of the threaded fastener 4 is greater than that of the first connecting member 1. For example, the threaded fastener 4 is made of iron, stainless steel, or a high-hardness alloy, while the first connecting member 1 is made of hard plastic, low-hardness aluminum alloy, or zinc alloy. At the same time, the diameter of the outer wall profile of the threaded fastener 4 is greater than the diameter of the first connecting hole 114. When the sharp end of the threaded fastener 4 is inserted into the first connecting hole 114 from the opening of the first connecting hole 114 and an external force drives the threaded fastener 4 to rotate in the first connecting hole 114, the external thread structure on the threaded fastener 4 forms an internal thread structure on the inner wall of the first connecting hole 114 in a self-tapping manner. At the same time, the threaded fastener 4 and the inner wall of the first connecting hole 114 are interlocked. The sharp end of the threaded fastener 4 is used to better enable the external thread on the threaded fastener 4 to form an internal thread structure on the inner wall of the first connecting hole 114. When at least a portion of the sharp end of the threaded fastener 4 is inserted into the connecting groove 23, the external thread of the threaded fastener 4 is engaged with the internal thread of the first connecting hole 114, causing the threaded fastener 4 to remain stationary within the first connecting hole 114. The second connector 2 is engaged with the threaded fastener 4 through the connecting groove 23 to prevent the end of the second connector 2 with the connecting groove 23 from being pulled out of the first connecting channel 113, thereby ensuring a firm connection between the first component 10 and the second component 20.

[0184] In a second embodiment where the threaded fastener 4 is directly threaded into the first connecting hole 114, the inner wall of the first connecting hole 114 is integrally formed with threads. The threaded fastener 4 is threaded into the first connecting hole 114 by engaging with the threads. In this case, the threaded fastener 4 is, for example, a screw, bolt, or threaded rod. By driving the threaded fastener 4 to engage with the threads on the inner wall of the first connecting hole 114, the threaded fastener 4 rotates and slides within the first connecting hole 114, allowing one end of the threaded fastener 4 to be inserted into the connecting groove 23. When one end of the threaded fastener 4 is inserted into the connecting groove 23, the external thread of the threaded fastener 4 is engaged with the threads, keeping the threaded fastener 4 stationary within the first connecting hole 114. The second connecting member 2 engages with the threaded fastener 4 through the connecting groove 23, preventing the end of the second connecting member 2 with the connecting groove 23 from being pulled out of the first connecting channel 113, thereby firmly connecting the first component 10 and the second component 20.

[0185] Furthermore, in Embodiment 1 of the present invention, the thread teeth are made of metal. For example, when the first connector 1 is made of metal, the thread teeth in the first connecting hole 114 can be formed on the inner wall of the first connecting hole 114 by tapping. Alternatively, when the first connector 1 is made of hard plastic, the metal thread teeth can be integrally formed in the first connecting hole 114 by injection molding, making the thread teeth and the first connector 1 a single unit, resulting in a more robust and reliable overall structure. Such metal thread teeth can increase the clamping force between the threaded fastener 4 (which is typically made of metal) and its external thread, improving the stability of the threaded fastener 4 within the first connecting hole 114. Furthermore, it avoids wear on the threaded fastener 4 caused by repeated disassembly and assembly.

[0186] As a first embodiment of the indirect threaded connection between the threaded fastener 4 and the first connecting hole 114, such as Figures 8-13As shown, the connecting component of Embodiment 1 of the present invention further includes a first metal block 8 disposed inside the first connecting hole 114. The first metal block 8 has a first threaded hole 81, and the threaded fastener 4 is threadedly connected to the first connecting hole 114 by engaging with the first threaded hole 81. For example, a tap is used to form the first threaded hole 81 on the first metal block 8, so that the inner wall of the first threaded hole 81 has an internal thread structure that engages with the threaded fastener 4. It should be noted that Embodiment 1 of the present invention does not limit the shape and thickness of the first metal block 8. For example, the cross-sectional shape of the first metal block 8 may be the same as or different from the cross-sectional shape of the first connecting hole 114, as long as the first metal block 8 can be inserted into the first connecting hole 114. For another example, the thickness of the first metal block 8 may be small, so that the first metal block 8 is in the form of a thin sheet, or the first metal block 8 is in the form of a flat plate or an arc plate, and the inner wall of the first threaded hole 81 can form two or more internal threads.

[0187] Furthermore, in order to ensure that the threaded fastener 4 is securely and stably placed within the first connecting hole 114, the first metal block 8 needs to be securely placed within the first connecting hole 114. In some embodiments, the first metal block 8 is interference-fitted into the interior of the first connecting hole 114, specifically, the cross-sectional area of ​​the first metal block 8 is larger than the cross-sectional area of ​​the first connecting hole 114, so that after the first metal block 8 is inserted into the first connecting hole 114 under external force, there is a large frictional force between the outer wall of the first metal block 8 and the inner wall of the first connecting hole 114 to achieve mutual clamping, thereby preventing the first metal block 8 in a stationary state from being directly pulled out or falling out of the first connecting hole 114. When the threaded fastener 4 is threaded into the first threaded hole 81, the threaded fastener 4 is driven to rotate so that it slides in the first connecting hole 114, causing one end of the threaded fastener 4 to be inserted into the connecting groove 23. The second connector 2 is inserted into the threaded fastener 4 through the connecting groove 23 to prevent the end of the second connector 2 with the connecting groove 23 from being pulled out of the first connecting channel 113, thereby making the first component 10 and the second component 20 firmly connected to each other.

[0188] In other implementations, such as Figures 8-13As shown, a protrusion 114a is formed on the inner wall of the first connecting hole 114. The protrusions 114a are spaced apart at the communication points between the first connecting channel 113 and the first connecting hole 114. The first metal block 8 is located between the protrusions 114a and the communication points between the first connecting hole 114 and the first connecting channel 113. The protrusions 114a can be a raised structure, with at least two protrusions spaced apart on the inner wall of the first connecting hole 114. Alternatively, the protrusions 114a can be an annular barrier arranged circumferentially around the first connecting hole 114. The thickness of the annular barrier can be relatively small to divide the first connecting hole 114 into upper and lower parts; or the thickness of the annular barrier can be relatively large, extending axially along the first connecting hole 114 to make the first connecting hole 114 a stepped hole. When the threaded fastener 4 is threaded into the first threaded hole 81, the threaded fastener 4 is driven to rotate so that it slides in the first connecting hole 114. At the same time, the first metal block 8 slides in the opposite direction to the threaded fastener 4. Since the protrusion 114a abuts against the first metal block 8, it restricts the first metal block 8 from sliding in the direction away from the connection between the first connecting hole 114 and the first connecting channel 113. This allows one end of the threaded fastener 4 to be smoothly inserted into the connecting groove 23. The second connector 2 is inserted into the threaded fastener 4 through the connecting groove 23 to restrict the end of the second connector 2 with the connecting groove 23 from being pulled out of the first connecting channel 113. This makes the first component 10 and the second component 20 firmly connected to each other.

[0189] Furthermore, in some implementations, such as Figures 10-11 As shown, when the first connecting hole 114 is a through hole structure, that is, both ends of the first connecting hole 114 penetrate through the opposite two outer side walls of the first connector 1, the first metal block 8 can be inserted from the opening of the first connecting hole 114 near the first connecting channel 113 into the space between the protrusion 114a and the communication between the first connecting hole 114 and the first connecting channel 113, and the threaded fastener 4 is inserted from the opening of the other end of the first connecting hole 114 and threadedly connected to the first threaded hole 81. In other embodiments, such as Figure 8 As shown, when the first connecting hole 114 is a blind hole or a through hole, the outer wall of the first connector 1 is provided with an insertion hole 119 communicating with the first connecting hole 114. The first metal block 8 is inserted through the insertion hole 119 between the protrusion 114a and the communication between the first connecting hole 114 and the first connecting channel 113. It can be understood that one end of the insertion hole 119 passes through the communication between the protrusion 114a and the first connecting hole 114 and the first connecting channel 113, so that the first metal block 8 is inserted through the insertion hole 119 between the protrusion 114a and the communication between the first connecting hole 114 and the first connecting channel 113, and the axial direction of the first threaded hole 81 is the same as the axial direction of the first connecting hole 114.

[0190] In other embodiments, when the first connector 1 is made of rigid plastic, the first metal block 8 can be integrally molded inside the first connector 1 by injection molding.

[0191] As a second embodiment of the indirect threaded connection between the threaded fastener 4 and the first connecting hole 114, such as Figures 14-20 As shown, the connecting component of Embodiment 1 of the present invention further includes a second metal block 9 disposed at the opening of the first connecting hole 114. The second metal block 9 has a second threaded hole 91 communicating with the first connecting hole 114. The threaded fastener 4 is threadedly connected to the first connecting hole 114 by engaging with the second threaded hole 91. For example, a tap is used to form the second threaded hole 91 on the second metal block 9, so that the inner wall of the second threaded hole 91 has an internal thread structure that engages with the threaded fastener 4. It should be noted that Embodiment 1 of the present invention does not limit the shape and thickness of the second metal block 9. For example, the cross-sectional shape of the second metal block 9 may be the same as or different from the cross-sectional shape of the first connecting hole 114, as long as at least a portion of the second metal block 9 covers the opening of the first connecting hole 114 and the second threaded hole 91 communicates with the first connecting hole 114. For example, the second metal block 9 may be flat or curved.

[0192] In some embodiments, the second metal block 9 is relatively separated from the outer wall of the first connector 1, such that when the threaded fastener 4 rotates within the second threaded hole 91, the second metal block 9 slides in the opposite direction to the sliding direction of the threaded fastener 4, so that the second metal block 9 abuts against the inner wall of the mounting channel 101. Further, as... Figures 14-19 As shown, to prevent the second metal block 9 from shifting when the first connector 1 is inserted into the mounting channel 101, the first connector 1 has a receiving groove 110 formed on the outer periphery of the opening of the first connecting hole 114 to accommodate the second metal block 9. The second metal block 9 is completely placed in the receiving groove 110 so that the surface of the second metal block 9 is flush with the outer wall of the first connector 1, ensuring that the first connector 1 does not shift when inserted into the mounting channel 101. For example Figures 17-19 As shown, the second metal block 9 is flat and can be completely accommodated within the receiving groove 110. The sidewall of the receiving groove 110 may be provided with latches to fix the second metal block 9 within the receiving groove 110. For example... Figures 14-16 As shown, the second metal block 9 is in the shape of an arc plate. When the second metal block 9 is placed in the receiving groove 110, the arc-shaped outer surface of the second metal block 9 is smoothly connected to the arc-shaped outer surface of the first connecting member 1, so as to improve the overall aesthetics.

[0193] In other implementations, such as Figure 20As shown, the second metal block 9 and the outer wall of the first connector 1 can be fixedly connected by adhesive or other means, so that the second metal block 9 will not be displaced when the first connector 1 is inserted into the installation channel 101.

[0194] In some implementations, such as Figures 33-41 As shown, the first connector 1 in Embodiment 1 of the present invention includes a first connector body 11 and a mounting post 12 integrally formed with the first connector body 11. The first connector body 11 includes a first connecting end 111 and a first mounting end 112 opposite to each other. A first connecting channel 113 is located at the first connecting end 111, and the mounting post 12 is located at the first mounting end 112. A first connecting hole 114 is located on the outer side wall of the first connector body 11. The outer side wall of the first connector body 11 and / or the outer side wall of the mounting post 12 are provided with fastening back teeth 13. When the first connector 1 is a rigid plastic part, the first connector body 11 and the mounting post 12 are formed into an integrated structure through injection molding. The cross-sections of the first connector body 11 and the mounting post 12 can be circular, elliptical, oval, square, or other irregular shapes, which are not limited here. The number of mounting posts 12 can be one or more.

[0195] Furthermore, to reduce the overall material usage and weight of the first connector 1, the number of mounting posts 12 is preferably one, and the cross-sectional area of ​​the mounting post 12 is smaller than the cross-sectional area of ​​the main body 11 of the first connector. The mounting post 12 is integrally formed on the end face of the first mounting end 112. In this case, the structure of the mounting channel 101 should be matched with the structure of the first connector 1, such as... Figures 59-63 As shown, the installation channel 101 includes two levels of sub-channels, specifically a first-level sub-channel 101a that mates with the first connector body 11 and a second-level sub-channel 101b that mates with the mounting post 12. This allows the first connector 1 to fit within the installation channel 101, reducing the gap between the first connector 1 and the inner wall of the installation channel 101, increasing the contact friction between the first connector 1 and the inner wall of the installation channel 101, thereby improving the connection strength of the first connector 1 to the first component 10. The two-level sub-channels of the installation channel 101 can be processed as follows: First, a drill bit (e.g., a six-sided drill) is used to drill into the side wall of the first component 10 and then slides to form the first-level sub-channel 101a. Then, the drill bit is controlled to move to the corresponding position of the second-level sub-channel 101b and then screwed in to form the second-level sub-channel 101b. Finally, the drill bit is controlled to move out sequentially from the second-level sub-channel 101b and the first-level sub-channel 101a. Thus, the installation channel 101 with two levels of sub-channels is processed on the side wall of the first component 10.

[0196] Furthermore, it can be understood that, such as Figure 37As shown, the fastening buckle 13 can be located on the outer wall of the first connector body 11. In this case, the outer wall of the mounting post 12 has a smooth structure, and the mounting post 12 serves a positioning purpose, used to distinguish the position of the first connecting hole 114 of the first connector 1. Or as... Figures 40-41 As shown, the fastening buckle 13 is located on the outer wall of the mounting post 12. At this time, the outer wall of the first connector body 11 is a smooth structure. The locking effect of the first connector 1 in the mounting channel 101 relies on the friction between the fastening buckle 13 of the mounting post 12 and the inner wall of the second-stage sub-channel 101b. Or, as... Figure 33 As shown, the outer side wall of the first connector body 11 and the outer side wall of the mounting post 12 are respectively provided with fastening barbs 13. At this time, the locking effect of the first connector 1 in the mounting channel 101 relies on the friction between the fastening barbs 13 of the first connector body 11 and the inner side wall of the first sub-channel 101a, and the fastening barbs 13 of the mounting post 12 and the inner side wall of the second sub-channel 101b. At this time, the friction between the first connector 1 as a whole and the inner side wall of the mounting channel 101 is large, and a large external force is required to pull the first connector 1 out of the mounting channel 101, making disassembly quite difficult.

[0197] Furthermore, in some implementations, such as Figure 35 , Figure 38 As shown, in the observation direction along the first connecting end 111 to the first mounting end 112, the outline of the outer wall of the first connector body 11 is an axisymmetric figure and has at least two first axes of symmetry 117. That is, the outline of the outer wall of the first connector body 11 is, for example, a circle, an ellipse, an oval, a rhombus, or a square. Correspondingly, the cross section of the first sub-channel 101a is adapted to be an axisymmetric figure with at least two axes of symmetry. When the first connector 1 is inserted into the mounting channel 101, in order to ensure that the first connecting hole 114 of the first connector body 11 corresponds to and is connected with the first mounting hole 102 of the first component 10, so as to avoid the need for disassembly and reassembly after the first connector 1 is reversed, the minimum distance between the intersection point of the straight line where the central axis of the mounting post 12 is located and the intersection point of the at least two first axes of symmetry 117 is greater than zero. That is, the straight line where the central axis of the mounting post 12 is located does not pass through the intersection point of the at least two first axes of symmetry 117, so that the mounting post 12 is eccentrically located on the first mounting end 112.

[0198] For example, the main body 11 of the first connector is cylindrical, and the central axis of the mounting post 12 is not on the same straight line as the central axis of the main body 11 of the first connector. Correspondingly, the central axis of the second-level sub-channel 101b is not on the same straight line as the central axis of the first-level sub-channel 101a, and at this time the second-level sub-channel 101b is eccentric relative to the first-level sub-channel 101a. When the first connector 1 is inserted into the mounting channel 101, the mounting post 12 is eccentric relative to the first connector body 11, and the second sub-channel 101b is eccentric relative to the first sub-channel 101a. Therefore, the operator needs to rotate the first connector body 11 to adjust the angle of the first connector body 11 within the first sub-channel 101a before the mounting post 12 can be smoothly inserted into the second sub-channel 101b. In this way, the eccentricity of the mounting post 12 relative to the first connector body 11 achieves the purpose of positioning the first connecting hole 114 and the first mounting hole 102, ensuring that the positions of the first connecting hole 114 and the first mounting hole 102 correspond and are connected after the first connector 1 is inserted into the mounting channel 101. In this case, the two-stage sub-channel processing method of the installation channel 101 can be as follows: First, a drill bit with a diameter adapted to the first-stage sub-channel 101a is drilled into the side wall of the first component 10 and then slid to form the first-stage sub-channel 101a. Then, the drill bit is removed from the first component 10. Next, the drill bit is moved to the corresponding position of the second-stage sub-channel 101b and screwed down to form the second-stage sub-channel 101b. Then, the drill bit is removed from the first component 10. Thus, the eccentrically arranged installation channel 101 is processed on the side wall of the first component 10.

[0199] Furthermore, in some implementations, such as Figures 62-63 As shown, the threaded fastener 4 can be pre-installed in the first connecting hole 114 and installed on the first component 10 along with the first connector 1. However, since the thickness of existing furniture panels is approximately 16mm or 18mm, correspondingly, to ensure strong installation stability of the first connector 1, the thickness of the first connector 1 is usually within 14mm or 16mm. Therefore, as Figure 34 , Figure 36 , Figure 39As shown, in order to ensure that the threaded fastener 4 can be smoothly pre-installed in the first connecting hole 114 of the first connector 1, the outer side wall of the first connector 1 in Embodiment 1 of the present invention includes a first side 115 and a second side 116 opposite to each other. The first connecting hole 114 is opened on the first side 115, and the threaded fastener 4 is inserted into the first connecting hole 114 from the first side 115 of the first connector 1. The distance between the central axis of the first connecting channel 113 and the first side 115 of the first connector 1 is set as L1, and the distance between the central axis of the first connecting channel 113 and the second side 116 of the first connector 1 is set as L2. Wherein, L1 and L2 satisfy: L1>L2. Understandably, the first connecting channel 113 is positioned close to the second side 116 of the first connector 1, so that the first connecting channel 113 is eccentrically located on the first connecting end 111. This allows the threaded fastener 4 to be inserted into the first connecting hole 114 from the first side 115 and completely placed within the first connecting hole 114, with one end of the threaded fastener 4 not at the position where the first connecting hole 114 connects to the first connecting channel 113. Subsequently, the threaded fastener 4 can be inserted into the mounting channel 101 together with the first connector 1. After the connecting groove 23 passes through the first connecting channel 113 and is positioned at the position where the first connecting hole 114 connects to the first connecting channel 113, a tool is used to drive the threaded fastener 4 to rotate within the first connecting hole 114 from the first mounting hole 102 of the first component 10, causing one end of the threaded fastener 4 to insert into the connecting groove 23. This connects the first connector 1 and the second connector 2, thereby connecting the first component 10 and the second component 20.

[0200] Furthermore, such as Figure 34 As shown, when the first connecting channel 113 is positioned close to the second side 116 of the first connector 1, the minimum distance between the second side 116 of the first connector 1 and the inner wall of the first connecting channel 113 is set to L3; wherein, L3 satisfies: 0.3mm≤L3≤6mm, for example, L3 is 0.3mm, 0.6mm, 0.8mm, 1.0mm, 2.3mm, 3.0mm, 3.5mm, 5.0mm or 6.0mm, etc. This design can ensure that the distance between the central axis of the first connecting channel 113 and the first side 115 of the first connector 1 is large, with sufficient space for pre-installation of threaded fasteners 4.

[0201] In some implementation methods, please refer to Figure 41The outer side wall of the first connecting member body 11 is provided with a positioning boss 118. It should be noted that the number of positioning bosses 118 in Embodiment 1 of the present invention can be one or more, for example, two positioning bosses 118 can be provided on the same side of the first connecting member body 11. Preferably, the number of positioning bosses 118 is one, and the positioning boss 118 is integrally formed on the outer side wall of the first connecting member body 11. The cross-section of the positioning boss 118 in Embodiment 1 of the present invention can be arc-shaped, square-shaped, or triangular-shaped, etc., and is not limited here. When the positioning boss 118 interferes with the opening of the first connecting hole 114, the positioning boss 118 has a through hole communicating with the first connecting hole 114, so that the threaded fastener 4 passes through the through hole and is placed inside the first connecting hole 114. Accordingly, the structure of the first-level sub-channel 101a of the mounting channel 101 is adapted to the first connector 1 with the positioning boss 118. That is, the inner sidewall of the first-level sub-channel 101a has a groove structure for accommodating the positioning boss 118. When the first connector 1 is inserted into the mounting channel 101, the positioning boss 118 and the groove on the inner sidewall of the first-level sub-channel 101a are aligned with each other, so that the first connector 1 can be smoothly inserted into the mounting channel 101. After the first connector 1 is completely placed in the mounting channel 101, the position of the first connecting hole 114 corresponds to the position of the first mounting hole 102 and they are interconnected. The positioning boss 118 serves to position the first connecting hole 114 and the first mounting hole 102. In addition, the technical solution of providing the positioning boss 118 on the outer sidewall of the first connector body 11 in Embodiment 1 of the present invention and the above-mentioned technical solution of the mounting post 12 being eccentrically set relative to the first connector body 11 can coexist.

[0202] Furthermore, Embodiment 1 of the present invention does not limit the specific shape or material of the second connector 2. For example, the second connector 2 can be a cylindrical structure, a square column structure, or a conical structure, etc. The second connector 2 can be made of metal or a rigid material, preferably a metal material, which has strong tensile and gravitational load-bearing capacity. In some embodiments, such as Figures 42-58 As shown, the structure of the second connector 2 in Embodiment 1 of the present invention is similar to the connecting rod structure of the four-in-one connector in the prior art. That is, the second connector 2 has a second connecting end 21 and a second mounting end 22 opposite to each other, a connecting groove 23 is located on the second connecting end 21, and the second mounting end 22 is used for detachable connection to the second component 20. To avoid the need to adjust the position of the connecting groove 23 after the second mounting end 22 is installed on the second component 20, the connecting groove 23 in Embodiment 1 of the present invention is an annular groove circumferentially arranged along the outer peripheral wall of the second connecting end 21. This avoids the troublesome positioning of the connecting groove 23 at the position where the first connecting hole 114 communicates with the first connecting channel 113, thus improving assembly efficiency.

[0203] The connection method between the second mounting end 22 of the second connector 2 and the second component 20 will be described in detail below.

[0204] As a first detachable connection method between the second mounting end 22 of the second connector 2 and the second component 20, such as Figures 42-54 As shown, the outer wall of the second mounting end 22 has a first external mounting thread 221. In use, a second mounting hole 201 is first opened on the surface of the second component 20. The diameter of the second mounting hole 201 is smaller than the diameter of the outer contour of the first external mounting thread 221. The second mounting end 22 is inserted into the second mounting hole 201 and rotated. The first external mounting thread 221 self-taps into the second mounting hole 201, so that the inner wall of the second mounting hole 201 forms an internal thread structure. The second external mounting thread 25 and the internal thread in the second mounting hole 201 interlock, so that one end of the second connector 2 is firmly connected to the second component 20. The end of the second mounting end 22 is pointed to allow for easier self-tapping connection into the second mounting hole 201.

[0205] As a second detachable connection method between the second mounting end 22 of the second connector 2 and the second component 20, such as Figure 55 As shown, the outer wall of the second mounting end 22 has a first mounting external thread 221. The connecting component of Embodiment 1 of the present invention also includes an expansion nut 5. The structure of the expansion nut 5 is exactly the same as that of the expansion nut 5 of the four-in-one connector in the prior art, and the structure of the expansion nut 5 is omitted here. The second mounting end 22 is rotatably disposed inside the expansion nut 5 and is used to drive the outer peripheral wall of the expansion nut 5 to expand outward, so that the second mounting end 22 is connected to the second component 20 through the expansion nut 5. In use, a second mounting hole 201 is first opened on the surface of the second component 20. The diameter of the second mounting hole 201 is larger than the diameter of the outer contour of the expansion nut 5. Then, the expansion nut 5 is pre-embedded in the second mounting hole 201 with clearance fit. The second mounting end 22 is rotatably inserted into the interior of the expansion nut 5 (that is, the first mounting external thread 221 is threadedly connected with the internal thread structure of the expansion nut 5). When the second connector 2 rotates, the second mounting end 22 drives the outer peripheral wall of the expansion nut 5 to gradually expand radially outward and abut against the inner side wall of the second mounting hole 201, so that the second mounting end 22 is firmly connected to the second component 20 through the expansion nut 5.

[0206] In some embodiments, to enable the rotation of the two types of second mounting ends 22, the prior art typically provides a slotted, Phillips head, or hexagonal slot on the end face of the second connecting end 21. A screwdriver or hex wrench is used to drive the second connecting end 21 to rotate, thereby rotating the second mounting end 22. In other embodiments, such as... Figures 42-55As shown, the second connector 2 is fixedly provided with an operating part 24 between the second connecting end 21 and the second mounting end 22. The operating part 24 has at least one first operating plane, a first operating hole, a first operating protrusion, or a first operating groove, or the cross-section of the operating part 24 is adapted to the cross-section of the sleeve. In this way, the second connector 2 is fixedly provided with an operating part 24 between the second connecting end 21 and the second mounting end 22. By using an external tool to act on the operating part 24 to drive the operating part 24 to rotate, the second connector 2 as a whole will rotate, thereby causing the second mounting end 22 to rotate. This avoids the need for a slotted groove, cross groove, or internal hexagonal groove on the end face of the second connecting end 21 in the prior art, so that the diameter of the end of the second connecting end 21 can be designed to be smaller, thereby reducing the cross-sectional area of ​​the first connecting channel 113. In addition, a threaded fastener 4 with a smaller diameter can be selected to cooperate with the connecting groove 23 of the second connecting end 21, thereby making the diameter of the first mounting hole 102 on the first component 10 smaller and improving the aesthetics of the finished furniture.

[0207] Furthermore, it can be understood that, in order to ensure that the external tool can drive the operating part 24 to rotate and thus drive the second connecting member 2 to rotate, the operating part 24 is integrally formed on the second connecting member 2, and the cross-section of the operating part 24 needs to be designed as non-circular or the operating part 24 needs to be designed as a non-cylindrical structure. For example Figure 42 , Figure 44 , Figure 45 , Figure 44 , Figure 50 , Figure 54 As shown, the operating part 24 has at least one first operating surface on its side wall. The number of first operating surfaces can be one, two, four, or six, etc. External tools such as pliers, wrenches, or clamps are used to clamp the operating part 24 to drive its rotation. Alternatively, the operating part 24 may have a first operating hole on its side wall. External tools such as screwdrivers, metal rods, or Allen wrenches are inserted into the first operating hole to drive the operating part 24 to rotate. For example... Figure 46 , Figure 47 As shown, the side wall of the operating part 24 has a first operating protrusion or a first operating groove. External tools such as pliers or a wrench are used to clamp the first operating protrusion or the first operating groove to drive the operating part 24 to rotate. For example... Figure 42 , Figure 44 , Figure 45 , Figure 48 , Figure 49 , Figure 51 , Figure 52As shown, the cross-section of the operating part 24 is adapted to the cross-section of the socket. The external tool that drives the operating part 24 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 T 3390.1-2004, or other national standard manual socket wrenches or electric wrenches. 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 24 to rotate synchronously with the socket, thereby causing the second connecting member 2 to rotate as a whole, and then causing the second mounting end 22 to rotate, so that the second mounting end 22 is firmly connected to the second component 20, or the second mounting end 22 is firmly connected to the second component 20 through the expansion nut 5.

[0208] Furthermore, such as Figure 43 As shown, when the second connector 2 is a cylindrical structure and has an operating part 24, the end diameter of the second connecting end 21 is set to D1, and the diameter of the annular connecting groove 23 is set to D2. To reduce the overall volume of the second connector 2 and improve its concealment, 2.0mm ≤ D1 ≤ 8.5mm, and 1.8mm ≤ D2 ≤ 8.5mm. D1 and D2 need to satisfy the relationship D1 > D2 in the design, i.e., satisfy the relationship in Table 1 below:

[0209] D1(mm) D2 (mm) 2 to 8.5 1.8 to 8.5 2 to 8.0 1.8 to 8.0 2 to 7.5 1.8 to 7.5 2 to 7.0 1.8 to 7.0 2 to 6.5 1.8 to 6.5 2 to 6.0 1.8 to 6.0 2 to 5.5 1.8 to 5.5 2 to 5.0 1.8 to 5.0 2 to 4.5 1.8 to 4.5 2 to 4.0 1.8 to 4.0 2 to 3.5 1.8 to 3.5

[0210] Table 1

[0211] As a third detachable connection method between the second mounting end 22 of the second connector 2 and the second component 20, such as Figures 56-58As shown, the structure of the second connector 2 in Embodiment 1 of the present invention is completely different from the connecting rod structure of the four-in-one connector in the prior art. Specifically, the second mounting end 22 is formed with a tapered portion, and the second connector 2 is fixedly provided with a second mounting external thread portion 25 between the second connecting end 21 and the second mounting end 22. Further, the connection method between the second connector 2 and the second component 20 in Embodiment 1 of the present invention is as follows: the connecting component in Embodiment 1 of the present invention also includes an expansion body 6, and a tapered channel 63 is formed inside the expansion body 6; the tapered portion is slidably disposed in the tapered channel 63; the second mounting external thread portion 25 is threadedly connected to a rotating body 7 with an internal thread; the outer wall of the rotating body 7 has at least one second operating plane or a second operating hole or a second operating protrusion or a second operating groove, or the cross-section of the rotating body 7 is adapted to the cross-section of the sleeve; when the rotating body 7 is driven to rotate by an external tool, the tapered portion slides a certain distance in the tapered channel 63 to make the outer peripheral wall of the expansion body 6 expand outward, thereby locking the second mounting end 22 in the second mounting hole 201 of the second component 20 through the expansion body 6. The outer peripheral sidewall of the expansion body 6 has a fastening boss to increase the locking effect between the outer peripheral sidewall of the expansion body 6 and the second mounting hole 201. The cross-sectional area of ​​one end of the tapered portion is larger than that of the other end. For example, it can be shaped like a frustum or a truncated cone, or it can be a non-conical protrusion, as long as the outer peripheral sidewall of the expansion body 6 can expand radially outward after the tapered portion slides in the tapered channel 63. There is no particular limitation on the shape of the tapered portion. The tapered portion is preferably shaped like a frustum. For example, the tapered portion is integrally formed on the end of the second connector 2 away from the connecting groove 23. In this case, the inner peripheral wall of the tapered channel 63 is also shaped like a frustum. The structure of the rotating body 7 in Embodiment 1 of the present invention is similar to the structure of the operating part 24 described above. The structure and driving principle of the rotating body 7 are omitted here.

[0212] Furthermore, in order to allow the tapered portion to be smoothly placed within the tapered channel 63 of the expansion body 6, the expansion body 6 can be formed by assembling multiple sub-components, for example... Figure 57As shown, the expansion body 6 includes a first sub-component 61 and a second sub-component 62. The first sub-component 61 has a first conical groove, and the second sub-component 62 has a second conical groove. When the first sub-component 61 and the second sub-component 62 are connected to each other, the first conical groove and the second conical groove are joined together to form a conical channel 63. Before the first sub-component 61 and the second sub-component 62 are connected, the conical part is pre-placed in the first conical groove or the second conical groove through a clearance fit. The end of the conical part with a larger cross-sectional area is located in the first conical groove or the second conical groove with a larger cross-sectional area, and the end of the conical part with a smaller cross-sectional area is located in the first conical groove or the second conical groove with a smaller cross-sectional area. This allows the conical part to be placed in the conical channel 63 and slide within the conical channel 63 after the first sub-component 61 and the second sub-component 62 are connected. Furthermore, the expansion body 6 and the conical portion can be separate structures, meaning that the conical portion is installed inside the expansion body 6 formed by the first sub-component 61 and the second sub-component 62 during use, and then the expansion body 6 is inserted into the first mounting hole 102 of the first component 10. Alternatively, the expansion body 6 and the conical portion can be a connected structure, meaning that after the first sub-component 61 and the second sub-component 62 are assembled, they are fixed by snaps or adhesives, thereby confining the conical portion within the conical channel 63, thus forming a connected structure between the expansion body 6 and the conical portion.

[0213] In use, a second mounting hole 201 is first opened on the surface of the second component 20. The diameter of the second mounting hole 201 is larger than the diameter of the outer contour of the expansion body 6. Then, the expansion body 6 is placed in the second mounting hole 201 of the second component 20 through clearance fit. When the external tool drives the rotating body 7 to rotate, the second connecting piece 2 slides in a straight line through the threaded connection between the internal thread of the rotating body 7 and the second mounting external thread 25, causing the tapered part to slide in the tapered channel 63. This causes the end with the larger cross-sectional area of ​​the tapered part to gradually slide towards the end with the smaller cross-sectional area of ​​the tapered channel 63, so that the tapered part and the inner peripheral wall of the tapered channel 63 gradually become an interference fit, so that the tapered part abuts against the inner wall of the tapered channel 63. This causes the outer peripheral wall of the expansion body 6 to gradually expand radially outward and bite into the inner side wall of the second mounting hole 201 of the second component 20, thereby connecting the second mounting end 22 to the second component 20 through the expansion body 6.

[0214] In some implementations, such as Figures 21-24 , Figures 53-54As shown, a recess 211 is formed on the outer peripheral wall of the second connecting end 21, making the second connecting end 21 stepped, and a connecting groove 23 is formed on the recess 211. Correspondingly, the position on the first connecting channel 113 corresponding to the second connecting end 21 is also stepped, so as to increase the depth of the first connecting hole 114, thereby giving the threaded fastener 4 sufficient space to be pre-installed in the first connecting hole 114, so as to facilitate the insertion of the threaded fastener 4 into the installation channel 101 along with the first connecting member 1, thereby improving assembly efficiency.

[0215] In some embodiments, when the first connector 1 is connected to the second connector 2, that is, when the end of the second connector 2 with the connecting groove 23 is inserted into the first connecting channel 113, the following situation may occur: the connecting groove 23 is insufficient at the position where the first connecting hole 114 communicates with the first connecting channel 113, which results in a gap between the side of the first component 10 and the surface of the second component 20, affecting aesthetics. Therefore, as... Figure 43 As shown, a corrective tilt portion 231 is formed at the position where the inner sidewall of the connecting groove 23 connects to the bottom of the groove 23. For example, the corrective tilt portion 231 makes the inner sidewall of the connecting groove 23 inclined. When the threaded fastener 4 slides in the first connecting hole 114 and one end of the threaded fastener 4 abuts against the corrective tilt portion 231, the end of the threaded fastener 4 drives the second connector 2 to slide further in the first connecting channel 113, thereby driving the second component 20 to move toward the first component 10, so that the surface of the second component 20 fits against the side of the first component 10, avoiding gaps between the first component 10 and the second component 20 and improving aesthetics.

[0216] Based on the connection component of Embodiment 1 of the present invention, the first component 10 and the second component 20 of the present invention are interconnected through the connection component of Embodiment 1 of the present invention to form a connection system, the connection system being specifically as follows: Figures 64-65As shown, the assembly includes a first component 10, a second component 20, a first connector 1, a second connector 2, and a threaded fastener 4. The structures of the first connector 1, the second connector 2, and the threaded fastener 4 are described in Embodiment 1 above and are omitted here. The first component 10 has an installation channel 101 on one side to accommodate the first connector 1. The first connector 1 is inserted into the installation channel 101, and the top of the first component 10 has a first installation hole 102 communicating with the first connecting hole 114. The second component 20 has a second installation hole 201 on one side, and the end of the second connector 2 furthest from the connecting groove 23 (i.e., the second installation end 22) is installed in the second installation hole 201. Specifically, the first component 10 has an installation channel 101 on one side, and the top (or bottom) of the first component 10 has a first installation hole 102 communicating with the installation channel 101, so that after the first connector 1 is inserted into the installation channel 101, the position of the first connecting hole 114 is opposite to and communicates with the position of the first installation hole 102. The installation method of the end of the second connector 2 away from the connecting groove 23 in the second mounting hole 201 of the second component 20 is described in the above embodiment 1 of the present invention, referring to the connection method between the second mounting end 22 and the second component 20. During installation, the threaded fastener 4 can be pre-installed in the first connecting hole 114 and inserted into the mounting channel 101 together with the first connector 1, so that the position of the first connecting hole 114 corresponds to and is connected to the position of the first mounting hole 102. The operator can use a screwdriver or other tool to drive the threaded fastener 4 to rotate in the first connecting hole 114 from the outside of the first component 10, so that one end of the threaded fastener 4 is inserted into the connecting groove 23, thereby restricting the second connector 2 from being pulled out of the first connecting channel 113, and thus ensuring a firm connection between the first component 10 and the second component 20.

[0217] Furthermore, such as Figures 59-63As shown, when the first connector 1 includes a first connector body 11 and a mounting post 12, the mounting channel 101 includes a first-level sub-channel 101a and a second-level sub-channel 101b that are interconnected. The shape of the first-level sub-channel 101a is adapted to the shape of the first connector body 11 to accommodate the first connector body 11, and the shape of the second-level sub-channel 101b is adapted to the shape of the mounting post 12 to accommodate the mounting post 12, so as to reduce the gap between the outer side wall of the first connector 1 and the inner side wall of the mounting channel 101 and improve the firmness and stability of the first connector 1 in the mounting channel 101. In some embodiments, when the outer contour of the cross-section of the first connector body 11 is either axisymmetric or non-axisymmetric, the cross-section of the first-level sub-channel 101a can be axisymmetric and have at least two second axes of symmetry. In this case, when the first connector 1 is inserted into the mounting channel 101, it is necessary to distinguish the installation direction of the first connector body 11 in the first-level sub-channel 101a to ensure that the position of the first connecting hole 114 corresponds to and is connected to the position of the first mounting hole 102 after the first connector 1 is inserted into the mounting channel 101, thus avoiding the need for reverse assembly of the first connector 1. For disassembly and reassembly, the minimum distance between the intersection points of the straight line containing the central axis of the second-level sub-channel 101b and at least two second axes of symmetry is greater than zero. This means the central axis of the second-level sub-channel 101b is not collinear with the central axis of the first-level sub-channel 101a. In this case, the second-level sub-channel 101b is eccentric relative to the first-level sub-channel 101a. For example, if the cross-sections of the first-level sub-channel 101a and the second-level sub-channel 101b are both circular, the central axes of the first-level sub-channel 101a and the second-level sub-channel 101b are not collinear. Correspondingly, the central axis of the mounting post 12 is also not collinear with the central axis of the first connecting body 11; that is, the mounting post 12 is eccentric relative to the first connecting body 11. The operator needs to rotate the first connector body 11 to adjust the angle of the first connector body 11 within the first sub-channel 101a before the mounting post 12 can be smoothly inserted into the second sub-channel 101b. In this way, the eccentricity of the mounting post 12 relative to the first connector body 11 is used to achieve the mutual positioning of the first connecting hole 114 and the first mounting hole 102, ensuring that the first connecting hole 114 and the first mounting hole 102 are connected after the first connector 1 is inserted into the mounting channel 101.

[0218] Furthermore, the first component 10 and the second component 20 of the connection system in Embodiment 1 of the present invention can be interconnected by one or more connection components. Therefore, the present invention does not limit the number of connection components between the first component 10 and the second component 20, and can be designed according to actual use.

[0219] Based on the connection component of Embodiment 1 of the present invention described above, the installation method of the first component 10 and the second component 20 using the connection component described above includes the following steps:

[0220] S100, an installation channel 101 is machined on one side of the first component 10, and a first installation hole 102 communicating with the installation channel 101 is machined on the top of the first component 10. For example, a six-sided drill or a regular drill bit is first drilled into one side of the first component 10 and slid a certain distance to form the installation channel 101. Then, a drill bit is used to machine the first installation hole 102 on the top (or bottom) of the first component 10. The diameter of the first installation hole 102 can be the same as or slightly larger than the diameter of the threaded fastener 4, or the diameter of the first installation hole 102 can be passed through by a tool that rotates the threaded fastener 4. The diameter of the first installation hole 102 in Embodiment 1 of the present invention is much smaller than the diameter of the first installation hole 102 machined on the first component 10 using a four-in-one connector in the prior art, thereby improving the concealment of the connecting component in Embodiment 1 of the present invention and improving the aesthetics of the finished furniture.

[0221] Furthermore, when the first connector 1 includes the first connector body 11 and the mounting post 12, the mounting channel 101 includes a first-level sub-channel 101a and a second-level sub-channel 101b that are interconnected. The cross-section of the first-level sub-channel 101a is an axisymmetric figure and has at least two second axes of symmetry. The minimum distance between the intersection point of the straight line containing the central axis of the second-level sub-channel 101b and the intersection point of the at least two second axes of symmetry is greater than zero. That is, the central axis of the second-level sub-channel 101b is not on the same straight line as the central axis of the first-level sub-channel 101a. At this time, the second-level sub-channel 101b is eccentric relative to the first-level sub-channel 101a. For example, the cross-section of the first-level sub-channel 101a and the cross-section of the second-level sub-channel 101b are both circular, and the central axis of the first-level sub-channel 101a and the central axis of the second-level sub-channel 101b are not on the same straight line. In this way, the operator needs to rotate the first connector body 11 to adjust the angle of the first connector body 11 within the first sub-channel 101a before the mounting post 12 can be smoothly inserted into the second sub-channel 101b. In this way, the eccentricity of the mounting post 12 relative to the first connector body 11 is used to achieve the purpose of positioning the first connecting hole 114 and the first mounting hole 102, ensuring that the first connecting hole 114 and the first mounting hole 102 are connected after the first connector 1 is inserted into the mounting channel 101.

[0222] S200. Install the end of the second connector 2 away from the connecting groove 23 onto one side of the second component 20. The installation method of the end of the second connector 2 away from the connecting groove 23 and the second component 20 is described above in the connection method between the second mounting end 22 and the second component 20 of Embodiment 1 of the present invention, and is omitted here.

[0223] S300: Insert the first connector 1 into the mounting channel 101 and connect the first connecting hole 114 with the first mounting hole 102. Insert one end of the second connector 2 with the connecting groove 23 into the first connecting channel 113 and position at least a portion of the connecting groove 23 at the position where the first connecting channel 113 connects with the first connecting hole 114. Drive the threaded fastener 4 to rotate from the first mounting hole 102 so that one end of the threaded fastener 4 is inserted into the connecting groove 23, thereby restricting the second connector 2 from sliding in the first connecting channel 113, thereby connecting the first component 10 and the second component 20. The threaded fastener 4 can be pre-installed in the first connecting hole 114 and simultaneously inserted into the mounting channel 101 along with the first connector 1, connecting the first connecting hole 114 with the first mounting hole 102. Then, use a tool to drive the threaded fastener 4 to rotate from the first mounting hole 102 so that one end of the threaded fastener 4 is inserted into the connecting groove 23, making the operation more convenient and shortening the assembly time. In addition, the threaded fastener 4 can be installed separately from the first connector 1. That is, after the first connector 1 is inserted into the installation channel 101, the first connecting hole 114 is connected to the first mounting hole 102. Then, the threaded fastener 4 is inserted into the first connecting hole 114 through the first mounting hole 102. Subsequently, a tool is used to drive the threaded fastener 4 to rotate in the first connecting hole 114 from the first mounting hole 102 so that one end of the threaded fastener 4 is inserted into the connecting groove 23. Alternatively, a tool can be used to drive the threaded fastener 4 to rotate so that the external thread of the threaded fastener 4 forms an internal thread structure with the inner sidewall of the first mounting hole 102 (the diameter of the first mounting hole 102 is slightly smaller than the outer circumference diameter of the threaded fastener 4). Then, the threaded fastener 4 is driven to rotate in the first connecting hole 114 so that one end of the threaded fastener 4 is inserted into the connecting groove 23. In this way, the threaded fastener 4 is threadedly connected to the first mounting hole 102 and the first connecting hole 114 at the same time, so that one end of the threaded fastener 4 is inserted into the connecting groove 23.

[0224] It should be further noted that the order of steps S100 and S200 can be interchanged.

[0225] Furthermore, for the method of separating the first component 10 and the second component 20 in Embodiment 1 of the present invention, please refer to the reverse operation of S300. That is, first pull the threaded fastener 4 out of the connecting groove 23 to release the locking of the threaded fastener 4 to the second connector 2, so that the end of the second connector 2 with the connecting groove 23 can be pulled out from the first connecting channel 113 and separated from the second component 20, thereby separating the first component 10 and the second component 20 from each other.

[0226] Example 2

[0227] To address the technical problem of the low concealment of the fixing pins in the finished furniture of the four-in-one connector in existing technologies, such as... Figures 66-74 As shown, Embodiment 2 of the present invention provides a connecting assembly, which is similar to the connecting assembly of Embodiment 1 above, except that: the connecting assembly of Embodiment 2 of the present invention includes, in addition to the first connecting member 1, the second connecting member 2 and the threaded fastener 4 of Embodiment 1 above, a third connecting member 3 is also included. The structure of the third connecting member 3 is the same as the structure of the fixing pin of the four-in-one connecting member in the prior art, specifically as follows: Figures 75-81 As shown, the outer side wall of the third connector 3 is provided with a third connecting channel 31, and one end of the third connector 3 is provided with a third connecting hole 32 communicating with the third connecting channel 31. It should be noted that for the specific structure, material or shape of the first connector 1, the second connector 2 and the threaded fastener 4 in Embodiment 2 of the present invention, please refer to the specific description of the specific structure, material or shape of the first connector 1, the second connector 2 and the threaded fastener 4 in Embodiment 1 above, which is omitted here.

[0228] Furthermore, the connection relationship between the first connector 1, the second connector 2, the third connector 3, and the threaded fastener 4 of the connecting assembly in Embodiment 2 of the present invention is as follows: Figures 66-74 As shown, the third connector 3 is inserted into the first connecting hole 114, connecting the third connecting channel 31 to the first connecting channel 113. One end of the second connector 2 passes through the first connecting channel 113, and at least a portion of the connecting groove 23 is positioned at the location where the third connecting channel 31 connects to the third connecting hole 32. The threaded fastener 4 is threadedly connected to the third connecting hole 32, and slides within the third connecting hole 32 so that one end of the threaded fastener 4 is inserted into the connecting groove 23. The third connector 3 can be made of metal or hard plastic. For example, when the third connector 3 is made of metal, an internal thread structure is formed on the inner wall of the third connecting hole 32 by tapping. The threaded fastener 4 is threadedly connected to the third connecting hole 32 by engaging with the internal thread structure on the inner wall of the third connecting hole 32. For example, when the third connector 3 is made of hard plastic, the third connector 3 has metal threads integrally formed on the inner wall of the third connecting hole 32 during the injection molding process. The threaded fastener 4 is threadedly connected to the third connecting hole 32 by engaging with the threads on the inner wall of the third connecting hole 32.

[0229] Based on the above solution, compared with the existing four-in-one connector, the third connector 3 of Embodiment 2 of the present invention can be pre-installed in the first connecting hole 114 and the third connecting channel 31 is connected to the first connecting channel 113. This avoids the trouble of positioning the fixing pin in the first mounting hole 102 during assembly of the existing four-in-one connector, making the operation more convenient and faster, and effectively shortening the assembly time of the connecting component on the first component 10 and the second component 20. At the same time, when the first mounting hole 102 is opened on the first component 10, the present invention does not need to be designed according to the diameter of the third connector 3 (i.e., the diameter of the fixing pin in the prior art). It only needs to ensure that the diameter of the first mounting hole 102 is large enough for the threaded fastener 4 to pass through and be inserted into the third connecting hole 32. This greatly reduces the diameter of the first mounting hole 102, thereby improving the concealment of the connecting component of the present invention inside the first component 10 and the second component 20, and thus improving the aesthetics of the finished furniture. In addition, the threaded fastener 4 of the present invention can also be pre-installed in the third connecting hole 32 (e.g., Figure 67 As shown, the diameter of the first mounting hole 102 is small enough to allow only the tool for rotating the threaded fastener 4 to pass through. Then, a screwdriver or other tool is used to drive the threaded fastener 4 to rotate in the third connecting hole 32 after passing through the first mounting hole 102. Compared with the existing four-in-one connector, which requires the threaded fastener 4 to be inserted from outside the first component 10 into the third connecting hole 32 during assembly, the operation is more convenient and faster, effectively shortening the assembly time of the connecting components on the first component 10 and the second component 20, and improving the assembly efficiency between the first component 10 and the second component 20.

[0230] In some embodiments, the fixing pin of the existing four-in-one connector is usually cylindrical. Therefore, the third connector 3 in Embodiment 2 of the present invention is preferably cylindrical. Correspondingly, the cross-section of the first mounting hole 102 is a circular hole adapted to the third connector 3. However, the cylindrical third connector 3 requires adjustment of its mounting angle within the first connecting hole 114 to ensure communication between the third connecting channel 31 and the first connecting channel 113. Typically, a groove is formed at the end of the third connector 3. Tools such as coins or thin plates are inserted into the groove to adjust the angle of the third connector 3 within the first connecting hole 114. However, due to the large axial depth of the first connecting channel 113, it is difficult to visually determine whether the first connecting channel 113 and the third connecting channel 31 are connected, resulting in a technical problem of high adjustment difficulty. Furthermore, frequent adjustments to the position of the third connector 3 within the first connecting hole 114 can easily reduce assembly efficiency. Therefore, as... Figures 77-81As shown, in Embodiment 2 of the present invention, the outer side wall of the third connector 3 has at least one positioning plane 33, positioning protrusion, or positioning groove; or, the cross-section of the third connector 3 is elliptical or oval. The shape of the inner side wall of the first connecting hole 114 matches the shape of the outer side wall of the third connector 3, that is, one side of the inner side wall of the first connecting hole 114 is planar, grooved, or protruding, etc. When the third connector 3 is inserted into the first connecting hole 114, the outer side wall of the third connector 3 and the inner side wall of the first connecting hole 114 are matched for insertion, thereby enabling the first connecting channel 113 and the third connecting channel 31 to be quickly connected, avoiding the trouble of adjusting the angle of the third connector 3 in the first connecting hole 114, thereby improving the assembly efficiency of the connecting component in Embodiment 2 of the present invention.

[0231] In some embodiments, when the first component 10 or the second component 20 is subjected to a large gravitational load, the end of the second connector 2 with the connecting groove 23 will bend under a large bending moment within the third connecting channel 31. This can easily cause the connecting groove 23 to move significantly at the junction of the third connecting channel 31 and the third connecting hole 32, resulting in the connecting groove 23 separating from the threaded fastener 4. At this time, the end of the second connector 2 with the connecting groove 23 can easily be pulled out from the first connecting channel 113, resulting in poor connection strength and stability between the first component 10 and the second component 20. Therefore, the two ends of the third connecting channel 31 pass through the opposite sides of the third connector 3, and the end of the second connector 2 passes through the third connecting channel 31 and extends out of the third connector 3. At least a portion of the connecting groove 23 is located at the junction of the third connecting channel 31 and the third connecting hole 32. Thus, when the end of the second connector 2 with the connecting groove 23 bends due to a large bending moment within the third connecting channel 31, that end of the second connector 2 will abut against the inner wall of one end of the third connecting channel 31. This limits the movement distance of the connecting groove 23 at the junction of the third connecting channel 31 and the third connecting hole 32, preventing the connecting groove 23 from separating from the threaded fastener 4, thereby improving the connection strength and stability between the first component 10 and the second component 20 during use. Furthermore, when one end of the second connector 2 abuts against the inner wall of one end of the third connecting channel 31, the gravity load bearing capacity of the first component 10 or the second component 20 can be further improved.

[0232] Furthermore, such as Figure 43 , Figure 76As shown, when the second connector has an operating part 24 and the third connector 3 is a cylindrical structure, the end diameter of the second connecting end 21 is set to D1, the diameter of the annular connecting groove 23 is set to D2, and the diameter of the third connector is set to D3. To reduce the overall volume of the second connector 2 and improve its concealment, the following parameters are used: 2.0mm ≤ D1 ≤ 8.5mm, 1.8mm ≤ D2 ≤ 8.5mm, and 4.5mm ≤ D3 ≤ 9.5mm. D3, D1, and D2 need to satisfy the relationship D3 ≥ D1 > D2, which is consistent with the design and meets the relationship in Table 2 below.

[0233] D3 (mm) D1(mm) D2 (mm) 9.5 2 to 8.5 1.8 to 8.5 9.0 2 to 8.0 1.8 to 8.0 8.5 2 to 7.5 1.8 to 7.5 8.0 2 to 7.0 1.8 to 7.0 7.5 2 to 6.5 1.8 to 6.5 7.0 2 to 6.0 1.8 to 6.0 6.5 2 to 5.5 1.8 to 5.5 6.0 2 to 5.0 1.8 to 5.0 5.5 2 to 4.5 1.8 to 4.5 5.0 2 to 4.0 1.8 to 4.0 4.5 2 to 3.5 1.8 to 3.5

[0234] Table 2

[0235] Based on the connection component of Embodiment 2 of the present invention, the first component 10 and the second component 20 of the present invention are interconnected through the connection component of Embodiment 2 of the present invention to form a connection system, the connection system being specifically as follows: Figures 84-85As shown, the assembly includes a first component 10, a second component 20, a first connector 1, a second connector 2, a third connector 3, and a threaded fastener 4. The structures of the first connector 1, the second connector 2, the third connector 3, and the threaded fastener 4 are described in the above description of Embodiment 2 of the present invention, and are omitted here. The first component 10 has an installation channel 101 on one side to accommodate the first connector 1, the first connector 1 is inserted into the installation channel 101, and the top of the first component 10 has a first installation hole 102 communicating with the first connecting hole 114. The second component 20 has a second installation hole 201 on one side, and the end of the second connector 2 furthest from the connecting groove 23 (i.e., the second installation end 22) is installed in the second installation hole 201. Specifically, a mounting channel 101 is provided on one side of the first component 10, and a first mounting hole 102 connected to the mounting channel 101 is provided on the top (or bottom) of the first component 10, so that after the first connector 1 is inserted into the mounting channel 101, the position of the first connecting hole 114 is opposite to and connected to the position of the first mounting hole 102. For the installation method of the end of the second connector 2 away from the connecting groove 23 in the second mounting hole 201 of the second component 20 in Embodiment 2 of the present invention, please refer to the connection method between the second mounting end 22 and the second component 20 in Embodiment 1 above; details are omitted here. During installation, the third connector 3 is pre-installed in the first connecting hole 114 and inserted into the installation channel 101 together with the first connector 1, so that the position of the first connecting hole 114 corresponds to and is connected to the position of the first mounting hole 102. The operator can use a screwdriver or other tools to drive the threaded fastener 4 to rotate in the third connecting hole 32 from the outside of the first component 10, so that one end of the threaded fastener 4 is inserted into the connecting groove 23, thereby restricting the second connector 2 from being pulled out in the first connecting channel 113, and thus making the first component 10 and the second component 20 firmly connected to each other.

[0236] Furthermore, such as Figures 82-83As shown, when the first connector 1 includes a first connector body 11 and a mounting post 12, the mounting channel 101 includes a first-level sub-channel 101a and a second-level sub-channel 101b that are interconnected. The shape of the first-level sub-channel 101a is adapted to the shape of the first connector body 11 to accommodate the first connector body 11, and the shape of the second-level sub-channel 101b is adapted to the shape of the mounting post 12 to accommodate the mounting post 12, so as to reduce the gap between the outer side wall of the first connector 1 and the inner side wall of the mounting channel 101 and improve the firmness and stability of the first connector 1 in the mounting channel 101. In some embodiments, when the outer contour of the cross-section of the first connector body 11 is either axisymmetric or non-axisymmetric, the cross-section of the first-level sub-channel 101a can be axisymmetric and have at least two second axes of symmetry. In this case, when the first connector 1 is inserted into the mounting channel 101, it is necessary to distinguish the installation direction of the first connector body 11 in the first-level sub-channel 101a to ensure that the position of the first connecting hole 114 corresponds to and is connected to the position of the first mounting hole 102 after the first connector 1 is inserted into the mounting channel 101, thus avoiding the need for reverse assembly of the first connector 1. For disassembly and reassembly, the minimum distance between the intersection points of the straight line containing the central axis of the second-level sub-channel 101b and at least two second axes of symmetry is greater than zero. This means the central axis of the second-level sub-channel 101b is not collinear with the central axis of the first-level sub-channel 101a. In this case, the second-level sub-channel 101b is eccentric relative to the first-level sub-channel 101a. For example, if the cross-sections of the first-level sub-channel 101a and the second-level sub-channel 101b are both circular, the central axes of the first-level sub-channel 101a and the second-level sub-channel 101b are not collinear. Correspondingly, the central axis of the mounting post 12 is also not collinear with the central axis of the first connecting body 11; that is, the mounting post 12 is eccentric relative to the first connecting body 11. The operator needs to rotate the first connector body 11 to adjust the angle of the first connector body 11 within the first sub-channel 101a before the mounting post 12 can be smoothly inserted into the second sub-channel 101b. In this way, the eccentricity of the mounting post 12 relative to the first connector body 11 is used to achieve the mutual positioning of the first connecting hole 114 and the first mounting hole 102, ensuring that the first connecting hole 114 and the first mounting hole 102 are connected after the first connector 1 is inserted into the mounting channel 101.

[0237] Furthermore, the first component 10 and the second component 20 of the connection system in Embodiment 2 of the present invention can be interconnected by one or more connection components. Therefore, the present invention does not limit the number of connection components between the first component 10 and the second component 20, and can be designed according to actual use.

[0238] Based on the connection component of Embodiment 2 of the present invention described above, the installation method of the first component 10 and the second component 20 using the connection component described above includes the following steps:

[0239] S100', An installation channel 101 is machined on one side of the first component 10, and a first installation hole 102 communicating with the installation channel 101 is machined on the top of the first component 10. For example, a six-sided drill or a regular drill bit is first drilled into one side of the first component 10 and slid a certain distance to form the installation channel 101. Then, a drill bit is used to machine the first installation hole 102 on the top (or bottom) of the first component 10. The diameter of the first installation hole 102 can be the same as or slightly larger than the diameter of the threaded fastener 4, or the diameter of the first installation hole 102 can be passed through by a tool that rotates the threaded fastener 4. The diameter of the first installation hole 102 in Embodiment 2 of the present invention is much smaller than the diameter of the first installation hole 102 machined on the first component 10 using a four-in-one connector in the prior art, thereby improving the concealment of the connection component in Embodiment 2 of the present invention and improving the aesthetics of the finished furniture.

[0240] Furthermore, when the first connector 1 includes the first connector body 11 and the mounting post 12, the mounting channel 101 includes a first-level sub-channel 101a and a second-level sub-channel 101b that are interconnected. The cross-section of the first-level sub-channel 101a is an axisymmetric figure and has at least two second axes of symmetry. The minimum distance between the intersection point of the straight line containing the central axis of the second-level sub-channel 101b and the intersection point of the at least two second axes of symmetry is greater than zero. That is, the central axis of the second-level sub-channel 101b is not on the same straight line as the central axis of the first-level sub-channel 101a. At this time, the second-level sub-channel 101b is eccentric relative to the first-level sub-channel 101a. For example, the cross-section of the first-level sub-channel 101a and the cross-section of the second-level sub-channel 101b are both circular, and the central axis of the first-level sub-channel 101a and the central axis of the second-level sub-channel 101b are not on the same straight line. In this way, the operator needs to rotate the first connector body 11 to adjust the angle of the first connector body 11 within the first sub-channel 101a before the mounting post 12 can be smoothly inserted into the second sub-channel 101b. In this way, the eccentricity of the mounting post 12 relative to the first connector body 11 is used to achieve the purpose of positioning the first connecting hole 114 and the first mounting hole 102, ensuring that the first connecting hole 114 and the first mounting hole 102 are connected after the first connector 1 is inserted into the mounting channel 101.

[0241] S200', Install the end of the second connector 2 away from the connecting groove 23 onto one side of the second component 20. For the installation method of the end of the second connector 2 away from the connecting groove 23 and the second component 20 in Embodiment 2 of the present invention, please refer to the connection method between the second mounting end 22 and the second component 20 in Embodiment 1 above; details are omitted here.

[0242] S300' Insert the first connector 1 into the mounting channel 101 and connect the first connecting hole 114 with the first mounting hole 102. Insert one end of the second connector 2 with the connecting groove 23 into the first connecting channel 113 and place at least a portion of the connecting groove 23 at the position where the first connecting channel 113 connects with the first connecting hole 114. Drive the threaded fastener 4 to rotate from the first mounting hole 102 so that one end of the threaded fastener 4 is inserted into the connecting groove 23 to restrict the second connector 2 from sliding in the first connecting channel 113, thereby connecting the first component 10 and the second component 20 to each other. The third connector 3 is pre-installed in the first connecting hole 114, and the third connecting channel 31 is connected to the first connecting channel 113. Then the threaded fastener 4 can also be pre-installed in the third connecting hole 32. The third connector 3 and the threaded fastener 4 are inserted into the installation channel 101 together with the first connector 1, and the first connecting hole 114 is connected to the first installation hole 102. Then, a tool is used to drive the threaded fastener 4 to rotate in the third connecting hole 32 from the first installation hole 102 so that one end of the threaded fastener 4 is inserted into the connecting groove 23. The operation is more convenient and the assembly time is shortened. In addition, the threaded fastener 4 can be installed separately from the third connector 3. That is, the third connector 3 is first inserted into the installation channel 101 together with the first connector 1, so that the first connecting hole 114 is connected to the first mounting hole 102. Then, the threaded fastener 4 is inserted into the third connecting hole 32 through the first mounting hole 102. Subsequently, a tool is used to drive the threaded fastener 4 to rotate in the third connecting hole 32 from the first mounting hole 102 so that one end of the threaded fastener 4 is inserted into the connecting groove 23. Alternatively, a tool can be used to drive the threaded fastener 4 to rotate so that the external thread of the threaded fastener 4 forms an internal thread structure with the inner sidewall of the first mounting hole 102 (the diameter of the first mounting hole 102 is slightly smaller than the outer circumference diameter of the threaded fastener 4). Then, the threaded fastener 4 is driven to rotate in the third connecting hole 32 so that one end of the threaded fastener 4 is inserted into the connecting groove 23. In this way, the threaded fastener 4 is threadedly connected with the third connecting hole 32 while engaging with the first mounting hole 102, so that one end of the threaded fastener 4 is inserted into the connecting groove 23.

[0243] It should be further noted that the order of steps S100' and S200' can be interchanged.

[0244] Furthermore, for the method of separating the first component 10 and the second component 20 in Embodiment 2 of the present invention, please refer to the reverse operation of S300', that is, first pull the threaded fastener 4 out of the connecting groove 23 to release the locking of the threaded fastener 4 on the second connector 2, so that the end of the second connector 2 with the connecting groove 23 can be pulled out from the first connecting channel 113 and separated from the second component 20, thereby separating the first component 10 and the second component 20 from each other.

[0245] Example 3

[0246] Embodiment 3 of the present invention provides a connecting component, which is similar to the connecting component of Embodiment 1 or Embodiment 2 described above, except that: Figures 86-90 As shown, in the connecting assembly of Embodiment 1 or Embodiment 2, the second connecting end 21 and the second mounting end 22 are integrally formed rigid structures. However, in Embodiment 3 of the present invention, the second connecting end 2 has a hinge portion 26 between the second connecting end 21 and the second mounting end 22. The second connecting end 21 and the second mounting end 22 rotate relative to each other through the hinge portion 26, so that the second connecting end 21 and the second mounting end 22 form a certain angle, such as 10°, 30°, 65°, 100°, 150°, or 180°. Figure 91 As shown, when the sides of the first component 10 and the second component 20 that are connected and attached to each other are both inclined surfaces, the included angle between the second connecting end 21 and the second mounting end 22 is adjusted according to the inclined surfaces of the first component 10 and the second component 20 that are connected to each other, so that the second mounting end 22 is fixedly connected to the connecting surface of the second component 20. Then, the second connecting end 21 is inserted into the first connecting channel 113 of the first connecting member 1 of the first component 10. Finally, the connecting surface of the first component 10 and the connecting surface of the second component 20 are attached to each other to achieve an invisible connection. The threaded fastener 4 is driven to move and be inserted into the connecting groove 23 to restrict the second connecting end 21 from being pulled out of the first connecting channel 113.

[0247] It should be noted that other structures of the second connector 2 in Embodiment 3 of the present invention can be found by referring to the structure of the second connector 2 in Embodiment 1 or Embodiment 2 above, and are omitted here. For example Figures 86-87 , Figures 89-90 As shown, when the second connector 2 is provided with an operating part 24, the operating part 24 can be closer to the second connecting end 21 than the hinge part 26. For example... Figure 88 As shown, when the second connector 2 is provided with a rotating body 7, the rotating body 7 is closer to the second mounting end 22 than the hinge portion 26.

[0248] Furthermore, such as Figure 92 As shown, in order to make the first connector 1 more invisibly inserted into the interior of the first component 10 without affecting the fit between the connecting surface of the first component 10 and the connecting surface of the second component 20, the first connecting end 111 of the first connector 1 in Embodiment 3 of the present invention is sharp, and the tilt angle of the first connecting end 111 is the same as the tilt angle of the connecting surface of the first component 10, so that after the first connector 1 is inserted into the mounting channel 101 of the first component 10, the first connecting end 111 is flush with the connecting surface of the first component 10, thus achieving the purpose of invisibility.

[0249] Furthermore, the hinge portion 26 in Embodiment 3 of the present invention can be a pivot, a hinge ball, or a universal joint structure. Specifically, for example... Figures 86-88 As shown, when the hinge 26 is a pivot, the second connecting end 21 and the second mounting end 22 are respectively provided with pivot holes. A pin or cylindrical structure is used as the pivot, passing sequentially through the pivot holes of the second connecting end 21 and the second mounting end 22, thereby allowing the second connecting end 21 and the second mounting end 22 to rotate relative to each other. For example, 89- Figure 90 As shown, when the hinge part 26 is a universal joint, such as a cross shaft, the second connecting end 21 and the second mounting end 22 are respectively provided with pivot holes. The pivot hole of the second connecting end 21 is sleeved on the first pivot of the cross shaft, and the pivot hole of the second mounting end 22 is sleeved on the second pivot of the cross shaft, so that the second connecting end 21 and the second mounting end 22 can rotate around the two axes of the cross shaft respectively, realizing the angle adjustment of the second connecting end 21 and the second mounting end 22 in three-dimensional space. The angle adjustment is more flexible and the assembly convenience is improved. Thus, the connecting component of Embodiment 3 of the present invention is suitable for the invisible connection of two furniture panels with the connecting surface of the bevel, improving the aesthetics of the finished furniture.

[0250] 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.

[0251] 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 connection assembly, characterized in that The connecting assembly comprises: a first connecting member, one end of which is provided with a first connecting channel, and an outer side wall of the first connecting member is provided with a first connecting hole in communication with the first connecting channel, and the outer side wall of the first connecting member is provided with at least one fastening undercut; a second connecting member, one end of which is formed with a connecting groove, and one end of the second connecting member is arranged in the first connecting channel and at least a part of the connecting groove is arranged at a position where the first connecting channel is in communication with the first connecting hole; and a threaded fastener, an outer peripheral side wall of which is provided with an external thread structure, the threaded fastener is threadedly connected in the first connecting hole, and the threaded fastener is slid in the first connecting hole to insert one end of the threaded fastener into the connecting groove; wherein the first connecting member is arranged in an installation channel arranged on one side of a first member and the first connecting hole is in communication with a first installation hole arranged on a top of the first member and in communication with the installation channel, the threaded fastener is pre-installed in the first connecting hole, the hole diameter of the first installation hole is small enough to allow only a tool for rotating the threaded fastener to pass through, one end of the second connecting member away from the connecting groove is arranged in a second installation hole of a second member, one end of the second connecting member having the connecting groove is arranged in the first connecting channel and the connecting groove is arranged at a position where the first connecting channel is in communication with the first connecting hole, and the threaded fastener is driven to rotate in the first connecting hole to slide in the first connecting hole and insert one end of the threaded fastener into the connecting groove; in addition, the second connecting member has opposite second connecting end and second installation end, the connecting groove is arranged on the second connecting end, and the second installation end is arranged to be detachably connected to the second member; the second connecting member is fixedly arranged between the second connecting end and the second installation end and has an operation portion, the operation portion has at least one first operation plane or first operation hole or first operation protrusion or first operation groove, or a cross section of the operation portion is adapted to a cross section of a sleeve; or the connecting assembly further comprises an expansion body, an inner portion of the expansion body is formed with a tapered channel, the second installation end is formed with a tapered portion, the tapered portion is slidably arranged in the tapered channel, the second connecting member is fixedly arranged between the second connecting end and the second installation end and has a second installation external thread portion, the second installation external thread portion is threadedly connected with a rotating body having an internal thread, an outer side wall of the rotating body has at least one second operation plane or second operation hole or second operation protrusion or second operation groove, or a cross section of the rotating body is adapted to a cross section of a sleeve, and when the rotating body is driven to rotate by an external tool, the tapered portion is slid in the tapered channel by a certain distance to expand an outer peripheral wall of the expansion body outward, so that the second installation end is connected to the second member through the expansion body.

2. The connection assembly of claim 1, wherein, The threaded fastener is inserted into the connection groove, and one end of the threaded fastener is sharp, and the threaded fastener is threadedly connected with the inner side wall of the first connection hole through self-tapping.

3. The connection assembly of claim 1, wherein, The inner side wall of the first connection hole is integrally formed with a thread, and the threaded fastener is threadedly connected with the thread to be threadedly connected in the first connection hole.

4. The connection assembly of claim 3, wherein, The thread is made of metal.

5. The connection assembly of claim 1, wherein, The connection assembly further comprises a first metal block arranged in the first connection hole, and the first metal block is provided with a first threaded hole, and the threaded fastener is threadedly connected with the first threaded hole to be threadedly connected in the first connection hole.

6. The connection assembly of claim 5, wherein, The first metal block is clamped in the first connection hole in an interference fit.

7. The connection assembly of claim 5, wherein, The inner side wall of the first connection hole is protruded to form a protruding portion, and the protruding portion is arranged at the communication position between the first connection channel and the first connection hole in a relative spacing manner; and the first metal block is located between the protruding portion and the communication position between the first connection hole and the first connection channel.

8. The connection assembly of claim 7, wherein, The outer side wall of the first connecting piece is provided with a insertion hole in communication with the first connection hole, and the first metal block is inserted into the protruding portion and the communication position between the first connection hole and the first connection channel through the insertion hole.

9. The connection assembly of claim 1, wherein, The connection assembly further comprises a second metal block arranged at the opening of the first connection hole, and the second metal block is provided with a second threaded hole in communication with the first connection hole. The threaded fastener is threadedly connected with the second threaded hole to be threadedly connected in the first connection hole.

10. The connection assembly of claim 9, wherein, The first connecting piece is provided with a receiving groove along the outer periphery of the opening of the first connection hole for accommodating the second metal block.

11. A connection assembly characterized in that, It comprises: A first connecting piece, one end of the first connecting piece is provided with a first connection channel, the outer side wall of the first connecting piece is provided with a first connection hole in communication with the first connection channel, and the outer side wall of the first connecting piece is provided with at least one fastening undercut; A second connecting piece, one end of the second connecting piece is provided with a connection groove; A third connecting piece, the outer side wall of the third connecting piece is provided with a third connection channel, one end of the third connecting piece is provided with a third connection hole in communication with the third connection channel, the third connecting piece is inserted into the first connection hole to make the third connection channel communicate with the first connection channel, and one end of the second connecting piece is arranged in the first connection channel to make at least a part of the connection groove arranged at the position where the third connection channel communicates with the third connection hole; and A threaded fastener, the outer peripheral side wall of the threaded fastener is provided with an external thread structure, the threaded fastener is threadedly connected in the third connection hole, and the threaded fastener is slid in the third connection hole to make one end of the threaded fastener inserted into the connection groove; The first connecting member is inserted into the installation channel of the first component and makes the first connecting hole communicate with the first installation hole of the first component, the threaded fastener is pre-installed in the first connecting hole, the diameter of the first installation hole is small enough for the tool to rotate the threaded fastener to pass through, the end of the second connecting member away from the connecting groove is locked in the second installation hole of the second component, the end of the second connecting member with the connecting groove is inserted into the first connecting channel and the connecting groove is located at the position where the third connecting channel communicates with the third connecting hole, the threaded fastener is driven to rotate in the third connecting hole to make the threaded fastener slide in the third connecting hole and the end of the threaded fastener is inserted into the connecting groove; In addition, the second connecting member has opposite second connecting end and second installation end, the connecting groove is located on the second connecting end, and the second installation end is used for detachable connection with the second component; The operation part is fixed between the second connecting end and the second installation end of the second connecting member, the operation part has at least one first operation plane or first operation hole or first operation convex point or first operation groove, or the cross section of the operation part is adapted to the cross section of the sleeve; or, The connecting assembly further comprises an expansion body, a tapered channel is formed in the interior of the expansion body, a tapered part is formed on the second installation end, the tapered part is slidingly arranged in the tapered channel, a second installation external thread part is fixed between the second connecting end and the second installation end of the second connecting member, and a threaded rotating body is threadedly connected to the second installation external thread part; the outer side wall of the rotating body has at least one second operation plane or second operation hole or second operation convex point or second operation groove, or the cross section of the rotating body is adapted to the cross section of the sleeve; when the rotating body is driven to rotate by an external tool, the tapered part slides in the tapered channel by a distance to make the outer peripheral wall of the expansion body outwardly expand, so that the second installation end is connected to the second component through the expansion body.

12. The connection assembly of claim 11, wherein, The outer side wall of the third connecting member has at least one positioning plane or positioning convex point or positioning groove, or the cross section of the third connecting member is oval or waist-round; The inner side wall of the first connecting hole is matched with the shape of the outer side wall of the third connecting member.

13. The connection assembly of claim 11, wherein, The two ends of the third connecting channel respectively penetrate through the opposite two sides of the third connecting member, one end of the second connecting member penetrates through the third connecting channel and extends outward of the third connecting member, and at least part of the connecting groove is located at the position where the third connecting channel communicates with the third connecting hole.

14. The connection assembly of claim 1 or 11, wherein, The first connecting member is a metal member or a hard plastic member.

15. The connection assembly of claim 1 or 11, wherein, The first connecting member comprises a first connecting member main body and an installation column integrally formed with the first connecting member main body, the first connecting member main body comprises opposite first connecting end and first installation end, the first connecting channel is located on the first connecting end, and the installation column is located on the first installation end; The first connecting hole is located on the outer sidewall of the first connecting member body, and the outer sidewall of the first connecting member body and / or the outer sidewall of the mounting column is provided with the fastening undercut.

16. The connection assembly of claim 15, wherein, In the viewing direction from the first connecting end to the first mounting end, the outer sidewall of the first connecting member body has an axisymmetric profile with at least two first symmetry axes, and the minimum distance between the straight line where the central axis of the mounting column is located and the intersection of the at least two first symmetry axes is greater than zero.

17. The connection assembly of claim 16, wherein, The first connecting member body is in the shape of a cylinder, and the central axis of the mounting column is not on the same straight line as the central axis of the first connecting member body.

18. The connection assembly of claim 15, wherein, The outer sidewall of the first connecting member includes opposite first and second sides, the first connecting hole is formed on the first side, and the threaded fastener is inserted into the first connecting hole from the first side of the first connecting member; The distance between the central axis of the first connecting channel and the first side of the first connecting member is set as L1, and the distance between the central axis of the first connecting channel and the second side of the first connecting member is set as L2; wherein L1 and L2 satisfy: L1 > L2.

19. The connection assembly of claim 18, wherein, The minimum distance between the second side of the first connecting member and the inner sidewall of the first connecting channel is set as L3; wherein L3 satisfies: 0.3mm ≤ L3 ≤ 6mm.

20. The connection assembly of claim 15, wherein, The outer sidewall of the first connecting member body is provided with a positioning boss.

21. The connection assembly of claims 1 or 11, wherein, The inner sidewall of the connecting groove is connected with the groove bottom at a position to form a correction inclined portion.

22. The connection assembly of claims 1 or 11, wherein, The outer peripheral wall of the second connecting end is formed with a recessed portion, and the connecting groove is formed on the recessed portion.

23. The connection assembly of claims 1 or 11, wherein, The outer sidewall of the second mounting end is formed with a first mounting external thread portion.

24. The connection assembly of claim 23, wherein, The connecting assembly further includes an expansion nut, and the second mounting end is rotatably arranged inside the expansion nut, for driving the outer peripheral wall of the expansion nut to expand outward, so that the second mounting end is connected to a second member through the expansion nut.

25. The connection assembly of claims 1 or 11, wherein, The second connecting member has a hinge portion between the second connecting end and the second mounting end, and the second connecting end and the second mounting end rotate relative to each other through the hinge portion.

26. A connection system characterized in that The connecting assembly includes a first member, a second member, and a connecting assembly according to any one of claims 1-25. One side of the first member is provided with a mounting channel for accommodating the first connecting member, and the top of the first member is provided with a first mounting hole in communication with the first connecting hole. One side of the second member is provided with a second mounting hole, and one end of the second connecting member away from the connecting groove is mounted in the second mounting hole.

27. The connection system of claim 26, wherein, The mounting channel includes a first-level sub-channel and a second-level sub-channel in communication with each other, the cross section of the first-level sub-channel is an axisymmetric figure with at least two second symmetry axes, and the minimum distance between the straight line where the central axis of the second-level sub-channel is located and the intersection of the at least two second symmetry axes is greater than zero.

28. The connection system of claim 27, wherein, The cross section of the first-level sub-channel and the cross section of the second-level sub-channel are respectively circular, and the central axis of the first-level sub-channel is not on the same straight line as the central axis of the second-level sub-channel.

29. A method of mounting employing the connection assembly according to any one of claims 1-25, characterized by, The method includes the following steps: The first connecting member is arranged in the mounting channel of the first member, and the threaded fastener is arranged in the first connecting hole of the first connecting member; An installation channel is formed on one side of the first member, and a first installation hole is formed on the top of the first member and communicates with the installation channel; An end of the second connecting member away from the connecting groove is installed on one side of the second member; The first connecting member is inserted into the installation channel and the first connecting hole communicates with the first installation hole, a threaded fastener is pre-installed in the first connecting hole, the first installation hole has a diameter for a tool to rotate the threaded fastener to pass through, the end of the second connecting member having the connecting groove is inserted into the first connecting channel and at least a part of the connecting groove is located at a position where the first connecting channel communicates with the first connecting hole, the threaded fastener is rotated from the first installation hole to insert one end of the threaded fastener into the connecting groove to limit the second connecting member from sliding in the first connecting channel, so that the first member and the second member are connected to each other.

30. The method of mounting of claim 29, wherein, The installation channel comprises a first sub-channel and a second sub-channel which communicate with each other, the cross section of the first sub-channel is an axisymmetric figure and has at least two second symmetry axes, and the minimum distance between the straight line where the central axis of the second sub-channel is located and the intersection of the at least two second symmetry axes is greater than zero.

31. The method of mounting of claim 30, wherein, The cross section of the first sub-channel and the cross section of the second sub-channel are circular respectively, and the central axis of the first sub-channel and the central axis of the second sub-channel are not on the same straight line.

32. The method of installing of claim 31, wherein, The threaded fastener is inserted through the first installation hole and one end of the threaded fastener is inserted into the connecting groove.

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