CN114278653A

CN114278653A - Connecting assembly, connecting system and mounting method

Info

Publication number: CN114278653A
Application number: CN202210018881.4A
Authority: CN
Inventors: 林晓群; 林晓欢; 苏伟生; 郭玉武
Original assignee: Guangdong Jino Hardware Industrial Co ltd
Current assignee: Guangdong Jino Hardware Industrial Co ltd
Priority date: 2022-01-09
Filing date: 2022-01-09
Publication date: 2022-04-05

Abstract

The invention discloses a connecting assembly, a connecting system and an installation method, which are used for connecting a first member and a second member, wherein the connecting assembly comprises a first connecting piece, a second connecting piece and a threaded fastener; one end of the second connecting piece is provided with a connecting groove, and the other end of the second connecting piece is arranged in the first connecting channel in a penetrating way and at least one part of the connecting groove is arranged at the position where the first connecting channel is communicated with the first connecting hole; the periphery lateral wall of threaded fastener is equipped with the external screw thread structure, and threaded fastener threaded connection is in first connecting hole, and threaded fastener slides in first connecting hole so that threaded fastener's one end inserts in the connecting groove. The furniture finished product can improve the invisibility and the overall aesthetic property after being connected by the connecting component.

Description

Connecting assembly, connecting system and mounting method

Technical Field

The invention discloses a connecting assembly, a connecting system and a mounting method, which are used for connecting a first member and a second member, in particular for connecting furniture members.

Background

At present, as the aesthetic concept of people is continuously improved, the invisible connecting pieces are gradually adopted between two furniture plates or two metal components to realize invisible connection, so that the attractiveness of furniture or equipment is improved, wherein the four-in-one connecting piece is widely applied to connection between the two furniture plates. As shown in fig. 1, the conventional four-in-one connector mainly comprises an expansion nut 5 ', a connecting rod 2', a fixing pin 3 'and a threaded fastener 4', wherein a first end of the connecting rod 2 'is provided with an external thread structure, a second end of the connecting rod is provided with a locking groove 21', a circumferential side wall of the fixing pin 3 'is provided with a pin hole 31' penetrating through two opposite sides of the fixing pin, and an end part of the fixing pin is provided with a locking hole 32 'with internal threads communicated with the pin hole 31'. When in use, as shown in fig. 2-3, firstly, an installation channel 101 ' is opened on one side of a first member 10 ', a first installation hole 102 ' communicated with the installation channel 101 ' is opened on the top of the first member 10 ', a second installation hole 201 ' is opened on the surface of a second member 20 ', then a fixing pin 3 ' is inserted into the first installation hole 102 ' and the pin hole 31 ' is communicated with the installation channel 101 ', an expansion nut 5 ' is pre-embedded in the second installation hole 201 ' of the second member 20 ', then a first end of a connecting rod 2 ' is rotatably inserted into the expansion nut 5 ' and is mutually locked with the second member 20 ' through the expansion nut 5 ', a second end of the connecting rod 2 ' is inserted into the installation channel 101 ' and the locking groove 21 ' is arranged in the pin hole 31 ', and finally, a threaded fastener 4 ' is inserted into the locking hole 32 ' and rotates in the locking hole 32 ', so that one end of the threaded fastener 4 ' is smoothly inserted into the locking groove 21 ', the second end of the connecting rod 2 ' is restricted from being pulled out of the mounting channel 101 ' by the threaded fastener 4 ', thereby achieving the interconnection of the first member 10 ' and the second member 20 '.

The first member 10 'and the second member 20' are connected by the four-in-one connector, so that the four-in-one connector has the characteristics of firm connection, strong load bearing capacity, easiness in disassembly and the like, and is widely applied to hidden connection between two furniture plates of a finished furniture product. However, in the prior art, in order to enable the first end of the connecting rod 2 ' to rotate in the expansion nut 5 ' to realize firm connection, the second end of the connecting rod 2 ' has a round head structure, and a straight groove, a cross groove or a hexagonal groove is formed in the end surface of the round head, and a screwdriver or a hexagonal wrench is used to rotate the round head to enable the first end of the connecting rod 2 ' to rotate in the expansion nut 5 '. According to the existing common use habit, in order to ensure that the round head of the connecting rod 2 'can be operated for multiple times to achieve a good dismounting effect, the diameter size of the round head of the existing connecting rod 2' is designed to be large, so that the aperture of the pin hole 31 'of the fixing pin 3' is large, and further the diameter size of the fixing pin 3 'is large, the diameter size of the end part of the fixing pin 3' is more than 10mm under normal conditions, the first mounting hole 102 'with the large aperture needs to be formed in the first member 10', a user can easily observe the fixing pin 3 'through the first mounting hole 102' with the large aperture, and the invisibility of the joint between the first member 10 'and the second member 20' is low, and the attractiveness of a furniture finished product is reduced.

Disclosure of Invention

In order to solve the technical problem of low invisibility of the fixing pin of the four-in-one connecting piece in the prior art on finished furniture, the invention provides a connecting assembly in a first aspect, which comprises:

the outer side wall of the first connecting piece is provided with at least one fastening inverted tooth;

a second connecting piece, one end of which is provided with a connecting groove, and one end of the second connecting piece is arranged in the first connecting channel in a penetrating way and at least one part of the connecting groove is arranged at the position where the first connecting channel is communicated with the first connecting hole; and

the outer peripheral side wall of the threaded fastener is provided with an external thread structure, the threaded fastener is in threaded connection with 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.

In some embodiments, one end of the threaded fastener inserted into the connection groove is sharp, and the threaded fastener is in threaded connection with the inner side wall of the first connection hole in a self-tapping manner.

In some embodiments, the inner side wall of the first connection hole is integrally formed with a screw thread, and the screw fastener is screwed into the first connection hole by matching with the screw thread.

In some embodiments, the thread ridge is made of metal.

In some embodiments, the connection assembly further includes a first metal block disposed inside the first connection hole, the first metal block defines a first threaded hole, and the threaded fastener is threadedly coupled to the first connection hole by mating with the first threaded hole.

In some embodiments, the first metal block is clamped inside the first connection hole in an interference fit manner.

In some embodiments, a protrusion is formed on the inner side wall of the first connection hole in a protruding manner, and the protrusion is arranged at the communication position of the first connection channel and the first connection hole at an opposite interval; the first metal block is positioned between the lug boss and the communication positions of the first connecting hole and the first connecting channel.

In some embodiments, an insertion hole communicating with the first connection hole is formed in an outer side wall of the first connection member, and the first metal block is inserted between the protruding portion and a communication portion of the first connection hole and the first connection channel through the insertion hole.

In some embodiments, the connecting assembly further includes a second metal block disposed in the first connecting hole opening, and the second metal block defines a second threaded hole communicating with the first connecting hole; the threaded fastener is in threaded connection with the second threaded hole in a matched mode, so that the threaded fastener is in threaded connection with the first connecting hole.

In some embodiments, the first connecting member is formed with a receiving groove along an opening periphery of the first connecting hole for receiving the second metal block.

Compared with the prior art, the connecting assembly based on the first aspect of the invention has the advantages that:

in the process of connecting a first member and a second member through the connecting assembly, firstly, an installation channel is arranged on one side of the first member, a first installation hole communicated with the installation channel is arranged at the top of the first member, and a second installation hole is arranged on the surface of the second member; then inserting the first connecting piece into the mounting channel and enabling the first connecting hole to correspond to the first mounting hole in position so as to enable the first connecting hole to be communicated with the first mounting hole, wherein one end of the second connecting piece, which is far away from the connecting groove, can be locked in the second mounting hole through threaded connection or an expansion nut; and finally, inserting one end of the second connecting piece, which is provided with a connecting groove, into the first connecting channel, arranging the connecting groove at a position where the first connecting channel is communicated with the first connecting hole, driving the threaded fastener to rotate in the first connecting hole from the first mounting hole so as to enable the threaded fastener to slide in the first connecting hole and enable one end of the threaded fastener to be inserted into the connecting groove, and utilizing the threaded fastener and the connecting groove to be matched with each other to limit the first connecting piece and the second connecting piece to be separated relatively, so that the first member and the second member are firmly connected with each other.

Compared with the four-in-one connecting piece in the prior art, the connecting assembly omits a fixing pin, so that the aperture of the first mounting hole can be designed correspondingly according to the diameter size of the threaded fastener, the aperture of the first mounting hole is smaller due to the smaller diameter size of the threaded fastener, and the invisibility of the connecting assembly in the first member and the second member is improved by reducing the aperture of the first mounting hole, so that the attractiveness of a finished furniture product is improved.

In addition, the threaded fastener can be pre-installed in the first connecting hole, so that the aperture of the first installing hole can be small enough to be penetrated by a tool for rotating the threaded fastener; adopt instrument such as screwdriver afterwards to pass behind the first mounting hole drive threaded fastener at first connecting hole internal rotation, compare with prior art's four unification connecting pieces need fix a position the fixed pin in first mounting hole when the assembly, the operation is more convenient rapid, has effectively shortened the assemble duration of coupling assembling on first component and second component, improves the assembly efficiency between first component and the second component.

In order to solve the technical problem of low invisibility of the fixing pin of the four-in-one connecting piece in the prior art on the finished furniture, the invention provides a connecting component in a second aspect, which comprises:

a second connecting piece, one end of which is formed with a connecting groove;

a third connecting piece, wherein a third connecting channel is arranged on the outer side wall of the third connecting piece, a third connecting hole communicated with the third connecting channel is arranged at one end of the third connecting piece, the third connecting piece is inserted into the first connecting hole and enables the third connecting channel to be communicated with the first connecting channel, one end of the second connecting piece is arranged in the first connecting channel in a penetrating way and enables at least one part of the connecting groove to be arranged at the position where the third connecting channel is communicated with the third connecting hole; and

the outer peripheral side wall of the threaded fastener is provided with an external thread structure, the threaded fastener is in threaded connection with 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.

In some embodiments, the outer side wall of the third connector has at least one positioning plane or positioning bump or positioning groove, or the cross section of the third connector is oval or oval;

the shape of the inner side wall of the first connecting hole is matched with the shape of the outer side wall of the third connecting piece.

In some embodiments, two ends of the third connecting channel respectively penetrate through two opposite sides of the third connecting member, one end of the second connecting member penetrates through the third connecting channel and extends out of the third connecting member, and at least a portion of the connecting groove is located at a position where the third connecting channel is communicated with the third connecting hole.

Compared with the prior art, the connecting assembly based on the second aspect of the invention has the advantages that:

in the process of connecting a first member and a second member through the connecting assembly, firstly, an installation channel is arranged on one side of the first member, a first installation hole communicated with the installation channel is arranged at the top of the first member, and a second installation hole is arranged on the surface of the second member; then inserting the first connecting piece into the mounting channel and enabling the first connecting hole to correspond to the first mounting hole in position so as to enable the first connecting hole to be communicated with the first mounting hole, wherein one end of the second connecting piece, which is far away from the connecting groove, can be locked in the second mounting hole through threaded connection or an expansion nut; and finally, inserting one end of the second connecting piece, which is provided with a connecting groove, into the first connecting channel, enabling the connecting groove to be arranged at a position where the third connecting channel is communicated with the third connecting hole, then driving the threaded fastener to rotate in the third connecting hole from the first mounting hole, so that the threaded fastener slides in the third connecting hole, enabling one end of the threaded fastener to be inserted into the connecting groove, and utilizing the mutual matching of the threaded fastener and the connecting groove to limit the relative separation of the first connecting piece and the second connecting piece, so that the first member and the second member are firmly connected with each other.

Compared with the four-in-one connecting piece in the prior art, the third connecting piece can be pre-installed in the first connecting hole and enables the third connecting channel to be communicated with the first connecting channel, the trouble that the fixing pin is positioned in the first installing hole when the four-in-one connecting piece in the prior art is assembled is avoided, the operation is more convenient and quicker, and the assembling time of the connecting piece on the first component and the second component is effectively shortened. Meanwhile, when the first member is provided with the first mounting hole, the design is not required according to the diameter size of the third connecting piece (namely the diameter size of the fixing pin in the prior art), and only the hole diameter of the first mounting hole is required to be passed through by the threaded fastener and inserted into the third connecting hole, so that the hole diameter of the first mounting hole is greatly reduced to improve the invisibility of the connecting component in the first member and the second member, and the attractiveness of a finished furniture product is improved.

In addition, the threaded fastener can be pre-installed in the third connecting hole, so that the aperture of the first mounting hole can be small enough to be penetrated by a tool for rotating the threaded fastener; and then, tools such as a screwdriver and the like are adopted to penetrate through the first mounting hole and then drive the threaded fastener to rotate in the third connecting hole, and compared with the prior art that the threaded fastener needs to be inserted into the third connecting hole from the outside of the first member during assembly of the four-in-one connecting piece, the operation is more convenient and quicker, the assembly time of the connecting assembly on the first member and the second member is effectively shortened, and the assembly efficiency between the first member and the second member is improved.

Further, based on the above-mentioned connection assembly of the first aspect and the second aspect of the present invention,

in some embodiments, the first connector is a metal piece or a hard plastic piece.

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 connection end and a first mounting end that are opposite, the first connection channel is located at the first connection end, and the mounting post is located at the first mounting end;

the first connecting hole is located on the outer side wall of the first connecting piece body, and the outer side wall of the first connecting piece body and/or the outer side wall of the mounting column are/is provided with the fastening inverted teeth.

In some embodiments, in a viewing direction from the first connecting end to the first mounting end, the outer sidewall of the first connecting member body is configured as an axisymmetric figure and has at least two first symmetry axes, and a minimum distance between a straight line where the central axis of the mounting post is located and an intersection point of the at least two first symmetry axes is greater than zero.

In some embodiments, the first connector body is cylindrical, and the central axis of the mounting post is not collinear with the central axis of the first connector body.

In some embodiments, the outer sidewall of the first connector includes first and second opposing sides, the first connection hole opens on the first side, and the threaded fastener is inserted into the first connection hole from the first side of the first connector;

setting a distance between a central axis of the first connecting passage and a first side of the first connecting piece to be L1, and setting a distance between the central axis of the first connecting passage and a second side of the first connecting piece to be L2; wherein L1 and L2 satisfy: l1> L2.

In some embodiments, the minimum distance between the second side of the first connector and the inner side wall of the first connecting channel is set to L3; wherein L3 satisfies: l3 is more than or equal to 0.3mm and less than or equal to 6 mm.

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

In some embodiments, a correction slope portion is formed at a position where an inner sidewall of the connection groove is connected to a groove bottom of the connection groove.

In some embodiments, the second connector has a second connecting end and a second mounting end opposite the second connecting end, the connecting recess being located on the second connecting end, the second mounting end being adapted to be removably connected to a second member.

In some embodiments, the outer circumferential wall of the second connection end is formed with a recess, and the connection groove is opened on the recess.

In some embodiments, the outer side wall of the second mounting end is formed with a first mounting external thread portion.

In some embodiments, the coupling assembly further includes an expansion nut, the second mounting end being rotatably disposed within an interior of the expansion nut for driving an outer peripheral wall of the expansion nut to expand outwardly to couple the second mounting end to a second member via the expansion nut.

In some embodiments, the second connector is fixedly provided with an operating portion between the second connecting end and the second mounting end, the operating portion has at least one first operating plane or first operating hole or first operating bump or first operating groove, or the cross section of the operating portion is adapted to the cross section of the sleeve.

In some embodiments, the connection assembly further comprises an expansion body having a tapered channel formed therein;

the second mounting end is provided with a conical part which is arranged in the conical channel in a sliding manner; a second mounting external thread part is fixedly arranged between the second connecting end and the second mounting end of the second connecting piece, and the second mounting external thread part is in matched threaded connection with a rotating body with internal threads; the outer side wall of the rotating body is provided with at least one second operating plane or second operating hole or second operating convex point or second operating groove, or the cross section of the rotating body is matched with the cross section of the sleeve;

when the rotating body is driven to rotate by an external tool, the conical part slides in the conical channel for a certain distance to enable the peripheral wall of the expansion body to expand outwards, so that the second mounting end is connected to a second component through the expansion body.

In some embodiments, the second link has a hinge between the second link end and the second mounting end, through which the second link end and the second mounting end rotate with respect to each other.

In order to solve the technical problem of low invisibility of the fixing pin of the four-in-one connector in the prior art on the finished furniture, the third aspect of the invention provides a connection, which comprises a first member, a second member and the connecting assembly of the first aspect or the second aspect of the invention;

one side of the first member is provided with an installation channel for accommodating the first connecting piece, and the top of the first member is provided with a first installation hole communicated with the first connecting hole;

and one side of the second member is provided with a second mounting hole, and one end of the second connecting piece, which is far away from the connecting groove, is mounted in the second mounting hole.

In some embodiments, the installation channel includes a first-stage sub-channel and a second-stage sub-channel that are communicated with each other, the cross section of the first-stage sub-channel is an axisymmetric figure and has at least two second symmetry axes, and the minimum distance between the intersection point of a straight line where the central axis of the second-stage sub-channel is located and the at least two second symmetry axes is greater than zero.

In some embodiments, the cross section of the first-stage sub-channel and the cross section of the second-stage sub-channel are circular, and the central axis of the first-stage sub-channel and the central axis of the second-stage sub-channel are not on the same straight line.

In order to solve the technical problem of low invisibility of the fixing pin of the four-in-one connector in the prior art on the finished furniture, a fourth aspect of the present invention provides a mounting method of the connecting assembly according to the first aspect or the second aspect of the present invention, comprising the following steps:

a mounting channel is processed on one side of the first component, and a first mounting hole communicated with the mounting channel is processed on the top of the first component;

mounting one end of the second connecting piece far away from the connecting groove on one side of the second component;

inserting the first connecting piece into the mounting channel and communicating the first connecting hole with the first mounting hole, and driving the threaded fastener to rotate from the first mounting hole so that one end of the threaded fastener is inserted into the connecting groove to limit the second connecting piece from sliding in the first connecting channel, thereby connecting the first member and the second member with each other.

In some embodiments, the threaded fastener is inserted through the first mounting hole and one end of the threaded fastener is inserted into the coupling groove.

Drawings

FIG. 1 is a schematic diagram of a prior art four-in-one connector;

FIG. 2 is a schematic exploded view of a four-in-one connector, a first member and a second member in the prior art;

FIG. 3 is a cross-sectional view of a first member coupled to a second member using a prior art four-in-one connector;

fig. 4 is a first connection diagram of the connection assembly of embodiment 1 of the present invention;

FIG. 5 is an exploded view of FIG. 4;

FIG. 6 is a cross-sectional view of FIG. 4, with the threaded fastener not inserted into the attachment recess;

FIG. 7 is a cross-sectional view of FIG. 4 with a threaded fastener inserted into the attachment recess;

fig. 8 is a second exploded view of the connecting assembly of embodiment 1 of the present invention;

FIG. 9 is a cross-sectional view of FIG. 8 in the coupled condition with the threaded fastener inserted into the coupling recess;

fig. 10 is a third schematic disassembled view of the connecting assembly of embodiment 1 of the invention;

FIG. 11 is a schematic view of FIG. 10 from another perspective;

FIG. 12 is a cross-sectional view of FIG. 10 in the connected state, with the threaded fastener not inserted into the connecting recess;

FIG. 13 is a cross-sectional view of FIG. 10 in the connected state with the threaded fastener inserted into the connecting recess;

fig. 14 is a fourth schematic disassembled view of the connecting assembly of example 1 of the present invention;

FIG. 15 is a cross-sectional view of FIG. 14 in the attached condition, with the threaded fastener not inserted into the attachment recess;

FIG. 16 is a cross-sectional view of FIG. 14 in the connected condition with a threaded fastener inserted into the connecting recess;

fig. 17 is a fifth connection diagram of the connection assembly of embodiment 1 of the present invention;

FIG. 18 is a schematic illustration of the disassembly of FIG. 17;

FIG. 19 is a cross-sectional view of FIG. 17 with a threaded fastener inserted into the attachment recess;

fig. 20 is a sixth disassembled schematic view of the connecting assembly of the embodiment 1 of the invention;

fig. 21 is a seventh disassembled schematic view of the connecting assembly of the embodiment 1 of the invention;

FIG. 22 is a cross-sectional view of FIG. 21 in the connected condition with a threaded fastener inserted into the connecting recess;

fig. 23 is an eighth exploded schematic view of the connecting assembly of embodiment 1 of the present invention;

FIG. 24 is a cross-sectional view of FIG. 23 in the attached condition with the threaded fastener inserted into the attachment recess;

fig. 25 is a ninth connection diagram of the connection assembly of embodiment 1 of the present invention;

FIG. 26 is a schematic illustration of the disassembly of FIG. 25;

FIG. 27 is a cross-sectional view of FIG. 25 with a threaded fastener inserted into the attachment recess;

fig. 28 is a tenth connecting schematic view of the connecting member of embodiment 1 of the invention;

FIG. 29 is a schematic illustration of the disassembly of FIG. 28;

FIG. 30 is a cross-sectional view of FIG. 28 with the threaded fastener not inserted into the attachment recess;

FIG. 31 is a cross-sectional view of FIG. 28 with a threaded fastener inserted into the attachment recess;

fig. 32 is an eleventh connection diagram of the connection module of embodiment 1 of the present invention;

fig. 33 is a first structural view of a first connecting member according to embodiment 1 of the present invention;

FIG. 34 is a half-sectional view of FIG. 33;

FIG. 35 is a rear view of FIG. 33;

FIG. 36 is a front view of FIG. 33;

fig. 37 is a second structural view of the first connecting member according to embodiment 1 of the present invention;

FIG. 38 is a rear view of FIG. 37;

FIG. 39 is a front view of FIG. 37;

fig. 40 is a third structural view of the first connecting member according to embodiment 1 of the present invention;

fig. 41 is a fourth structural view of the first connecting member according to embodiment 1 of the present invention;

FIG. 42 is a first constitutional view of a second joining member according to embodiment 1 of the invention;

FIG. 43 is a half-sectional view of FIG. 42;

FIG. 44 is a second constitutional view of the second connecting member according to embodiment 1 of the invention;

FIG. 45 is a third construction view of a second joint member according to embodiment 1 of the invention;

FIG. 46 is a fourth structural view of a second connecting member according to embodiment 1 of the present invention;

FIG. 47 is a fifth construction view of a second connecting member according to embodiment 1 of the present invention;

FIG. 48 is a sixth construction view of the second joint member according to embodiment 1 of the invention;

FIG. 49 is a seventh constitutional view of the second connecting member according to embodiment 1 of the invention;

FIG. 50 is an eighth constitutional view of the second connecting member according to embodiment 1 of the invention;

FIG. 51 is a ninth constitutional view of the second joining member of embodiment 1 of the invention;

fig. 52 is a tenth constitutional view of the second joint member of embodiment 1 of the invention;

fig. 53 is an eleventh constitutional view of the second joint member according to embodiment 1 of the invention;

fig. 54 is a twelfth construction view of the second connection member according to embodiment 1 of the invention;

fig. 55 is a schematic structural view of a second coupling member and an expansion nut according to embodiment 1 of the present invention;

FIG. 56 is a schematic view showing the connection of the second coupling member, the expansion body and the rotating body according to embodiment 1 of the present invention;

FIG. 57 is a schematic illustration of the disassembly of FIG. 56;

FIG. 58 is a schematic view in half section of FIG. 56;

FIG. 59 is a schematic structural view of a first member in embodiment 1 of the invention;

FIG. 60 is a cross-sectional view taken along A-A of FIG. 59;

fig. 61 is a schematic exploded view of a first link and a first member according to embodiment 1 of the present invention;

FIG. 62 is a schematic view of the first attachment member of FIG. 61 mounted to the first member;

FIG. 63 is a cross-sectional view taken along line B-B of FIG. 62;

fig. 64 is a first exploded view of the connection system of embodiment 1 of the present invention;

FIG. 65 is a cross-sectional view of FIG. 64 in a connected state;

fig. 66 is a schematic exploded view of the first connecting member and the third connecting member according to embodiment 2 of the present invention;

fig. 67 is a sectional view showing the third connecting member of embodiment 2 of the present invention preassembled inside the first connecting member;

fig. 68 is a first exploded view of the connecting assembly of embodiment 2 of the present invention;

FIG. 69 is a cross-sectional view of FIG. 68 in a connected state;

fig. 70 is a second exploded view of the connecting assembly of example 2 of the present invention;

FIG. 71 is a cross-sectional view of FIG. 70 in a connected state;

fig. 72 is a third exploded schematic view of the connecting member of embodiment 2 of the present invention;

FIG. 73 is a cross-sectional view of FIG. 72 in a connected state;

fig. 74 is a fourth schematic disassembled view of the connecting assembly of example 2 of the present invention;

FIG. 75 is a first structural view of a third connecting member according to embodiment 2 of the present invention;

FIG. 76 is a schematic view of the structure of FIG. 75 from another perspective;

FIG. 77 is a second constitutional view of the third connecting member according to embodiment 2 of the invention;

FIG. 78 is a third structural view of a third connecting member according to embodiment 2 of the present invention;

FIG. 79 is a fourth constitutional view of the third connecting member according to embodiment 2 of the invention;

FIG. 80 is a fifth construction view of a third connecting member according to embodiment 2 of the present invention;

FIG. 81 is a sixth construction view of a third connecting member according to embodiment 2 of the present invention;

FIG. 82 is a schematic structural view showing that the third connecting member of embodiment 2 of the present invention is mounted to the first structural member after being preassembled inside the first connecting member;

FIG. 83 is a cross-sectional view taken along line C-C of FIG. 82;

fig. 84 is a broken-away schematic view of the connection system of embodiment 2 of the invention;

FIG. 85 is a cross-sectional view of FIG. 84 in a connected state;

FIG. 86 is a first constitutional view of the second joining member according to embodiment 3 of the invention;

FIG. 87 is a schematic illustration of the disassembly of FIG. 86;

FIG. 88 is a second constitutional view showing a second connecting member according to embodiment 3 of the invention;

FIG. 89 is a third constitutional view of the second joining member according to embodiment 3 of the invention;

FIG. 90 is a schematic illustration of the disassembly of FIG. 89;

FIG. 91 is a schematic view showing the connection of a first member to a second member in embodiment 3 of the present invention;

fig. 92 is a schematic structural view of a first connecting member according to embodiment 3 of the invention;

fig. 93 is a schematic, broken away view of a connection system according to embodiment 3 of the invention;

FIG. 94 is a cross-sectional view of FIG. 93 in a connected state;

fig. 95 is another broken-away schematic view of the connection system of embodiment 3 of the invention;

fig. 96 is a sectional view of fig. 95 in a connected state.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating 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 the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1-3, in the prior art, a four-in-one connecting member is composed of an expansion nut 5 ', a connecting rod 2', a fixing pin 3 'and a threaded fastener 4', and is mainly used for realizing invisible connection between two furniture plates. In the embodiment of the present invention, one of the furniture plate elements is a first member 10 ', the other furniture plate element is a second member 20', the shape or material of the first member 10 'and the second member 20' may be the same or different, for example, the shape is a plate-shaped body, a block-shaped body, a column-shaped body, etc., and the material may be wood, plastic, metal, or a polymer composite material, etc., or a combination thereof, which is not limited herein.

Further, the following describes the specific structure of the conventional four-in-one connector in detail. The expansion nut 5 'has certain elastic deformation capacity, the expansion nut 5' is internally provided with an internal thread structure, and the outer side wall of the expansion nut is provided with a bulge. The first end of the connecting rod 2 'is provided with an external thread structure which is matched and connected with the interior of the expansion nut 5', and the second end of the connecting rod 2 'is provided with a locking groove 21'. The anchor pin 3 'is, for example, cylindrical, and has a pin hole 31' formed through opposite sides thereof in a circumferential side wall of the anchor pin 3 ', and a lock hole 32' communicating with the pin hole 31 'and having an internal thread formed in one end portion of the anchor pin 3'. The outer peripheral side wall of the threaded fastener 4 'is provided with an external thread structure, and the threaded fastener 4' is, for example, a screw or a bolt, so that the threaded fastener 4 'can be rotated in the lock hole 32' in a matching manner.

When the first member 10 ' and the second member 20 ' are connected to each other using the prior art four-in-one connector, a mounting channel 101 ' is formed on one side of the first member 10 ', a first mounting hole 102 ' communicating with the mounting channel 101 ' is formed on the top (or bottom) of the first member 10 ', a second mounting hole 201 ' is formed on the surface of the second member 20 ', a fixing pin 3 ' is inserted into the first mounting hole 102 ' to communicate the pin hole 31 ' with the mounting channel 101 ', an expansion nut 5 ' is pre-embedded in the second mounting hole 201 ' of the second member 20 ' with a clearance fit, a first end of a connecting rod 2 ' is rotatably inserted into the expansion nut 5 ' and is locked to the second member 20 ' by the expansion nut 5 ', a second end of the connecting rod 2 ' is inserted into the mounting channel 101 ' to place the locking groove 21 ' in the pin hole 31 ', and a threaded fastener 4 ' is inserted into the locking hole 32 ' to rotate in the locking hole 32 ', so that one end of the threaded fastener 4 ' is smoothly inserted into the locking groove 21 ' and the second end of the connecting rod 2 ' is restricted from being withdrawn from the installation passage 101 ' by the threaded fastener 4 ', thereby achieving the mutual connection of the first member 10 ' and the second member 20 '.

In order to enable the first end of the connecting rod 2 'to rotate inside the expansion nut 5', a straight groove, a cross groove or a hexagonal groove (usually a cross groove) is usually formed in the second end surface of the connecting rod 2 ', and a screwdriver is used to act on the cross groove to drive the connecting rod 2' to rotate, so that the first end of the connecting rod 2 'rotates inside the expansion nut 5' and is firmly connected with the second member 20 'through the expansion nut 5'. However, since the first end of the connecting rod 2 'is inserted into the interior of the expansion nut 5' and the second end is inserted into the mounting channel 101 ', the connecting rod 2' is required to have a sufficient length, which is usually greater than 30mm, in order to achieve a good mounting and dismounting effect, the second end of the connecting rod 2 'is round-head-shaped and the round-head has a larger diameter, so that a deeper cross-shaped groove can be formed on the round-head, so as to ensure the acting force of the screwdriver on the round-head and the stability of driving the connecting rod 2' to rotate, and ensure that the screwdriver can repeatedly operate the round-head to realize the repeated mounting and dismounting of the connecting rod 2 'on the first member 10'.

However, the round head of the second end of the connecting rod 2 'directly causes the hole diameter of the pin hole 31' to be larger, and further causes the diameter of the fixing pin 3 'to be larger, and the diameter of the fixing pin 3' is usually 10mm or more, which results in the need of larger hole diameter of the first mounting hole 102 'of the first member 10', and the user can easily observe the fixing pin 3 'through the first mounting hole 102' with larger hole diameter, thereby causing the invisibility of the joint between the first member 10 'and the second member 20' to be lower, and reducing the aesthetic property of the finished furniture.

Example 1

For this reason, in order to solve the technical problem of low invisibility of the fixing pin of the four-in-one connector in the prior art on the finished furniture, as shown in fig. 4 to 65, embodiment 1 of the present invention provides a connecting assembly, so that the first member 10 and the second member 20 are invisibly connected by the connecting assembly of embodiment 1 of the present invention, and the size of the slot hole formed on the first member 10 or the second member 20 is small, so that it is difficult for a user to observe the connecting assembly from the outside of the first member 10 or the second member 20, thereby improving the aesthetic property of the finished furniture.

Specifically, as shown in fig. 4 to 32, the connection assembly of embodiment 1 of the present invention includes a first connection member 1, a second connection member 2, and a threaded fastener 4, and when in use, the first connection member 1 is first installed on the first member 10, the second connection member 2 is installed on the second member 20, then a portion of the second connection member 2 is inserted into the first connection member 1, and then the threaded fastener 4 is inserted into the first connection member 1 and restricts the second connection member 2 from being pulled out from the first connection member 1, so that the first connection member 1 and the second connection member 2 are connected to each other, and the first member 10 and the second member 20 are firmly connected to each other.

The specific structures and the principle of mutual connection of the first connecting member 1, the second connecting member 2 and the threaded fastener 4 of the connecting assembly according to embodiment 1 of the present invention will be described in detail below.

As shown in fig. 33-41, one end of the first connecting member 1 of embodiment 1 of the present invention is provided with a first connecting channel 113, an outer side wall of the first connecting member 1 is provided with a first connecting hole 114 communicated with the first connecting channel 113, and an outer side wall of the first connecting member 1 is provided with at least one fastening inverted tooth 13. As shown in fig. 42 to 58, one end of the second connection member 2 of embodiment 1 of the present invention is formed with a connection groove 23. As shown in fig. 4 to 32, the outer circumferential side wall of the threaded fastener 4 according to embodiment 1 of the present invention is provided with an external thread structure, and the threaded fastener 4 is threadedly coupled into the first coupling hole 114. As shown in fig. 4-32 and 61-65, in use, the first connecting member 1 is first installed inside the first member 10, the end of the second connecting member 2 away from the connecting groove 23 is installed on the second member 20, and then the end of the second connecting member 2 having the connecting groove 23 is inserted into the first connecting channel 113, so that at least a portion of the connecting groove 23 is located at a position where the first connecting channel 113 is communicated with the first connecting hole 114. The threaded fastener 4 is driven to rotate in the first connection hole 114 while the threaded fastener 4 slides in the first connection hole 114, so that one end of the threaded fastener 4 can be inserted into the connection groove 23, the end of the second connection member 2 having the connection groove 23 is restricted from being pulled out of the first connection passage 113 by the threaded fastener 4 and the connection groove 23 cooperating with each other, so that the first connection member 1 and the second connection member 2 are connected with each other, and the first member 10 and the second member 20 are firmly connected with each other.

In embodiment 1 of the present invention, the specific shape and material of the first connecting member 1 are not limited, for example, the first connecting member 1 may be cylindrical, conical, square cylindrical, trapezoidal, or the cross section may be an axisymmetric pattern or the cross section may be a non-axisymmetric pattern, the material of the first connecting member 1 may be a metal material, a rigid plastic material, a wood material, or other materials with relatively high hardness, and the first connecting member 1 has relatively high physical or chemical stability, stable structure, and relatively long service life. Preferably, the first connecting member 1 according to embodiment 1 of the present invention is preferably a metal member or a hard plastic member, and the metal material is, for example, stainless steel, zinc alloy, or other hard alloy, which has strong load bearing capacity and strong physical and chemical stability. Still further preferably, the first connecting member 1 of embodiment 1 of the present invention is a hard plastic member, and can be manufactured into an integral member by an injection molding process, so that the processing steps are reduced, and the production efficiency is improved.

Further, the first connecting element 1 according to embodiment 1 of the present invention is locked inside the first member 10 by the fastening invertion 13, specifically, as shown in fig. 59-60, the side wall of the first member 10 is firstly provided with the installation channel 101, the structure and the size of the installation channel 101 are adapted to the structure and the size of the first connecting element 1, during the process of inserting the first connecting element 1 into the installation channel 101, the fastening invertion 13 is bent inward toward the outer side wall of the first connecting element 1, after the first connecting element 1 is stationary, the fastening invertion 13 forms a large deformation tension on the inner side wall of the installation channel 101, and the sliding friction force between the first connecting element 1 and the inner side wall of the installation channel 101 is increased, so that the first connecting element 1 is difficult to be pulled out after being inserted into the installation channel 101, and the first connecting element 1 is firmly locked inside the first member 10. Meanwhile, in order to enable an operator to drive the threaded fastener 4 to rotate in the first connection hole 114 from the outside of the first member 10, the top (or bottom) of the first member 10 is opened with a first installation hole 102 communicated to the first connection hole 114, wherein the first installation hole 102 is communicated with the installation channel 101, that is, before the first connecting member 1 is inserted into the installation channel 101, the installation channel 101 is opened on the side wall of the first member 10 by, for example, machining, and the first installation hole 102 communicated with the installation channel 101 is opened on the top, and then the first connecting member 1 is inserted into the installation channel 101 so that the position of the first connection hole 114 is aligned with and communicated with the position of the first installation hole 102.

In order to ensure the connection firmness of the first connecting piece 1 on the first member 10, the fastening inverse tooth 13 of the embodiment 1 of the present invention is integrally formed with the first connecting piece 1, and the fastening inverse tooth 13 is formed on the outer side wall of the first connecting piece 1 by machining or injection molding, for example. The number of the fastening inverted teeth 13 is one or more, for example, a plurality of fastening inverted teeth 13 are sequentially provided at intervals between both ends of the first connecting member 1. Further in order to improve the connection stability of the first connecting piece 1 on the first member 10, the opposite outer side walls of the first connecting piece 1 are respectively provided with fastening reverse teeth 13, so that the first connecting piece 1 is inserted into the first member 10 and then is mutually engaged with the inner side walls of the installation channel 101 through the fastening reverse teeth 13 on both sides, and the stability and the firmness of the first connecting piece 1 in the installation channel 101 are improved.

Further, the threaded fastener 4 of embodiment 1 of the present invention is the threaded fastener 4 in the prior art four-in-one connector, for example, a screw, a bolt, a threaded rod, or the like, and is preferably a countersunk screw or bolt, the material of the threaded fastener 4 may be metal, rigid plastic, or the like, and is preferably a metal material, and the hardness is relatively high so as to prevent the threaded fastener 4 from being damaged by a relatively high pulling force applied to the first connector 1, and thus the end of the second connector 2 having the connection groove 23 is easily pulled out of the first connection channel 113.

Based on the above solution, compared with the four-in-one connector in the prior art, the connecting assembly in embodiment 1 of the present invention omits the use of a fixing pin, so that the aperture of the first mounting hole 102 can be designed according to the diameter of the threaded fastener 4 or the diameter of the tool for rotating the threaded fastener 4, the aperture of the first mounting hole 102 is also smaller due to the smaller diameter of the threaded fastener 4 or the smaller diameter of the tool for rotating the threaded fastener 4, and the invisibility of the connecting assembly in embodiment 1 of the present invention inside the first member 10 and the second member 20 is improved by reducing the aperture of the first mounting hole 102, thereby improving the aesthetic property of the finished furniture. In addition, the threaded fastener 4 of embodiment 1 of the present invention may also be pre-installed in the first connection hole 114, so that the aperture of the first installation hole 102 may be small enough to be passed through by a tool for rotating the threaded fastener 4; and then, a tool such as a screwdriver is adopted to pass through the first mounting hole 102 and then drive the threaded fastener 4 to rotate in the first connecting hole 114, compared with the prior art that a fixing pin needs to be positioned in the first mounting hole 102 during assembly of the four-in-one connector, the operation is more convenient and quicker, the assembly time of the connecting assembly on the first member 10 and the second member 20 is effectively shortened, and the assembly efficiency between the first member 10 and the second member 20 is improved.

In addition, after the first member 10 and the second member 20 are connected by using the connecting assembly of embodiment 1 of the present invention, when the first member 10 and the second member 20 are separated by a tensile force, the tensile force borne by the first connecting member 1 mainly acts between the fastening inverse tooth 13 and the inner side wall of the installation channel 101, and since the engagement area between the fastening inverse tooth 13 and the installation channel 101 is large and the gripping effect is strong, the tensile load capacity borne by the first connecting member 1 in the installation channel 101 is stronger, compared with the case where the first member 10 and the second member 20 are connected by using the four-in-one connecting member of the prior art, the tensile load capacity between the first member 10 and the second member 20 is greatly improved, thereby improving the connection stability between the first member 10 and the second member 20.

Further, the threaded fastener 4 is directly or indirectly connected to the first connection hole 114 by driving the threaded fastener 4 to rotate to cause the threaded fastener 4 to slide in the first connection hole 114, so that one end of the threaded fastener 4 is inserted into the connection groove 23. The following description will be made in detail with respect to the specific contents of the threaded fastener 4 threadedly coupled into the first coupling hole 114.

As a first embodiment in which the threaded fastener 4 is directly threadedly coupled to the first connection hole 114, as shown in fig. 4 to 7, the end of the threaded fastener 4 inserted into the connection groove 23 is pointed, and the threaded fastener 4 is threadedly coupled to the inner side wall of the first connection hole 114 in a self-tapping manner. Specifically, at this time, 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 or stainless steel or an alloy with greater hardness, the first connecting member 1 is made of hard plastic or an aluminum alloy with lower hardness or a zinc alloy, and the outside wall profile of the threaded fastener 4 has a diameter dimension greater than that 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 the threaded fastener 4 is driven to rotate in the first connecting hole 114 by an external force, the external thread structure on the threaded fastener 4 forms an internal thread structure on the inside wall of the first connecting hole 114 in a self-tapping manner, and the threaded fastener 4 and the inside wall of the first connecting hole 114 are engaged with each other, and 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 inside 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 coupling groove 23, since the external thread of the threaded fastener 4 is relatively engaged with the internal thread of the first coupling hole 114 to bring the threaded fastener 4 into a stationary state in the first coupling hole 114, the second coupling member 2 is cooperatively inserted with the threaded fastener 4 through the coupling groove 23 to restrict the end of the second coupling member 2 having the coupling groove 23 from being pulled out of the first coupling passage 113, thereby firmly coupling the first member 10 and the second member 20 to each other.

As a second embodiment in which the threaded fastener 4 is directly threadedly coupled to the first connection hole 114, a thread is integrally formed on an inner side wall of the first connection hole 114, and the threaded fastener 4 is threadedly coupled to the first connection hole 114 by being engaged with the thread. At this time, the threaded fastener 4 is, for example, a screw or a bolt or a threaded rod, and the threaded fastener 4 is driven to be engaged with the thread of the inner side wall of the first connection hole 114, so that the threaded fastener 4 slides while rotating in the first connection hole 114, so that one end of the threaded fastener 4 can be inserted into the connection groove 23. When the one end of the threaded fastener 4 is inserted into the coupling groove 23, since the external thread of the threaded fastener 4 is engaged with the thread ridge to make the threaded fastener 4 in a stationary state in the first coupling hole 114, the second coupling member 2 is fittingly inserted into the threaded fastener 4 through the coupling groove 23 to restrict the one end of the second coupling member 2 having the coupling groove 23 from being pulled out of the first coupling passage 113, thereby firmly coupling the first member 10 and the second member 20 to each other.

Further, the thread of embodiment 1 of the present invention is made of a metal material. For example, when the first connection member 1 is made of a metal material, the thread in the first connection hole 114 may be formed on the inner sidewall of the first connection hole 114 by tapping using a tap. For example, when the first connection member 1 is made of hard plastic, a thread made of metal may be integrally formed in the first connection hole 114 by an injection molding process, and the thread and the first connection member 1 are formed as a single piece, so that the overall structure is more secure and reliable. The thread ridge made of the metal material can increase the gripping force between the thread ridge and the external thread of the threaded fastener 4 (the threaded fastener 4 is usually made of the metal material), the firmness of the threaded fastener 4 in the first connecting hole 114 is improved, and in addition, the threaded fastener 4 is prevented from being abraded due to repeated dismounting and mounting.

As a first implementation manner of the indirect threaded connection between the threaded fastener 4 and the first connection hole 114, as shown in fig. 8 to 13, the connection assembly according to embodiment 1 of the present invention further includes a first metal block 8 disposed inside the first connection hole 114, the first metal block 8 defines a first threaded hole 81, and the threaded fastener 4 is in threaded connection with the first threaded hole 81 so that the threaded fastener 4 is in threaded connection with the first connection hole 114. Wherein the first screw hole 81 is formed in the first metal block 8 by tapping, for example, using a tap, so that the inner side wall of the first screw hole 81 has an internal thread structure to be screw-coupled with the screw fastener 4. It should be noted that the shape and thickness of the first metal block 8 are not limited in embodiment 1 of the present invention, for example, the cross-sectional shape of the first metal block 8 is the same as or different from the cross-sectional shape of the first connection hole 114, as long as the first metal block 8 can be placed in the first connection hole 114. For example, the thickness of the first metal block 8 is small so that the first metal block 8 is thin, or the first metal block 8 is flat plate-shaped or arc plate-shaped, and the inner side wall of the first threaded hole 81 may have an internal thread structure of two or more turns.

Further, in order to firmly and stably place the threaded fastener 4 in the first connection hole 114, the first metal block 8 needs to be firmly placed in the first connection hole 114. In some embodiments, the first metal block 8 is clamped inside the first connection hole 114 in an interference fit manner, specifically, the cross-sectional area of the first metal block 8 is larger than that of the first connection hole 114, so that after the first metal block 8 is inserted into the first connection hole 114 under the action of an external force, a larger friction force exists between the outer side wall of the first metal block 8 and the inner side wall of the first connection hole 114 to realize mutual abutting, thereby limiting the first metal block 8 in a static state from being directly pulled out or falling off from the first connection hole 114. When the threaded fastener 4 is screwed into the first threaded hole 81, the threaded fastener 4 is driven to rotate so that the threaded fastener 4 slides in the first connecting hole 114, so that one end of the threaded fastener 4 is inserted into the connecting groove 23, and the second connector 2 is cooperatively inserted with the threaded fastener 4 through the connecting groove 23 to restrict the one end of the second connector 2 having the connecting groove 23 from being pulled out of the first connecting passage 113, thereby firmly connecting the first member 10 and the second member 20 to each other.

In other embodiments, as shown in fig. 8-13, a protrusion 114a is formed on the inner sidewall of the first connection hole 114 in a protruding manner, and the protrusion 114a is disposed at a position where the first connection channel 113 is communicated with the first connection hole 114 at an opposite interval; the first metal block 8 is located between the communication positions of the protruding portion 114a and the first connection hole 114 and the first connection passage 113. The protruding portion 114a may be a bump structure, the number of the bumps is at least two, and the at least two bumps are respectively disposed on the inner sidewall of the first connecting hole 114 at intervals. The protruding portion 114a may also be an annular enclosure arranged along the circumferential direction of the first connection hole 114, wherein the thickness of the annular enclosure may be smaller to divide the first connection hole 114 into an upper portion and a lower portion; or the thickness dimension of the annular enclosure is larger, and the thickness of the annular enclosure extends along the axial direction of the first connecting hole 114, so that the first connecting hole 114 is in a step hole shape. When the threaded fastener 4 is screwed in the first threaded hole 81, the threaded fastener 4 is driven to rotate so that the threaded fastener 4 slides in the first connecting hole 114, meanwhile, the first metal block 8 slides in the opposite direction relative to the threaded fastener 4, because the protrusion 114a abuts against the first metal block 8 to limit the first metal block 8 to slide in the direction away from the communicating position between the first connecting hole 114 and the first connecting channel 113, one end of the threaded fastener 4 is smoothly inserted into the connecting groove 23, the second connecting part 2 is mutually matched and plugged with the threaded fastener 4 through the connecting groove 23 to limit the one end of the second connecting part 2 with the connecting groove 23 to be pulled out from the first connecting channel 113, and the first member 10 is firmly connected with the second member 20.

Further, in some embodiments, as shown in fig. 10 to 11, when the first connection hole 114 is a through hole structure, that is, two ends of the first connection hole 114 respectively penetrate through two opposite outer side walls of the first connection member 1, the first metal block 8 can be inserted between the communication positions of the protruding portion 114a and the first connection hole 114 and the first connection channel 113 from one end opening of the first connection hole 114 close to the first connection channel 113, and the threaded fastener 4 is inserted from the other end opening of the first connection hole 114 and is in threaded connection with the first threaded hole 81. In other embodiments, as shown in fig. 8, when the first connection hole 114 is a blind hole or a through hole, the outer side wall of the first connection member 1 is formed with an insertion hole 119 communicating with the first connection hole 114, and the first metal block 8 is inserted between the protruding portion 114a and the communication position of the first connection hole 114 and the first connection channel 113 through the insertion hole 119. It can be understood that one end of the insertion hole 119 penetrates between the communication positions of the boss 114a and the first connection holes 114 and the first connection channels 113, so that the first metal block 8 is inserted between the communication positions of the boss 114a and the first connection holes 114 and the first connection channels 113 through the insertion hole 119 and the axial direction of the first threaded hole 81 is the same as the axial direction of the first connection holes 114.

In other embodiments, when the first connecting member 1 is made of a hard plastic material, the first metal block 8 can be integrally formed inside the first connecting member 1 by an injection molding process.

As a second implementation manner of the indirect threaded connection between the threaded fastener 4 and the first connection hole 114, as shown in fig. 14-20, the connection assembly in example 1 of the present invention further includes a second metal block 9 disposed in the opening of the first connection hole 114, wherein the second metal block 9 is provided with a second threaded hole 91 communicated with the first connection hole 114; the threaded fastener 4 is threadedly coupled by mating with the second threaded hole 91 such that the threaded fastener 4 is threadedly coupled within the first coupling hole 114. Wherein the second threaded hole 91 is formed in the second metal block 9 by tapping, for example, using a tap, so that the inner side wall of the second threaded hole 91 has an internal thread structure that is in threaded engagement with the threaded fastener 4. It should be noted that embodiment 1 of the present invention does not limit the shape and thickness dimension of the second metal block 9, for example, the cross-sectional shape of the second metal block 9 is the same as or different from the cross-sectional shape of the first connection hole 114, and only at least a portion of the second metal block 9 is required to cover the opening of the first connection hole 114 and make the second threaded hole 91 communicate with the first connection hole 114. The second metal block 9 has a flat plate shape or an arc plate shape, for example.

In some embodiments, the second metal block 9 is relatively separated from the outer side wall of the first connecting member 1, so that when the threaded fastener 4 rotates in the second threaded hole 91, the second metal block 9 slides along the direction opposite to the sliding direction of the threaded fastener 4, so that the second metal block 9 abuts against the inner side wall of the installation channel 101. Further, as shown in fig. 14 to 19, in order to prevent the second metal block 9 from being displaced when the first connecting member 1 is inserted into the installation channel 101, the first connecting member 1 is formed with a receiving groove 110 for receiving the second metal block 9 along the opening periphery of the first connecting hole 114, and the second metal block 9 is entirely placed in the receiving groove 110 so that the surface of the second metal block 9 is flush with the outer sidewall of the first connecting member 1, thereby ensuring that the first connecting member 1 is not displaced when inserted into the installation channel 101. For example, as shown in fig. 17-19, the second metal block 9 has a flat plate shape and can be completely accommodated in the accommodating groove 110, and the side wall of the accommodating groove 110 can be provided with a snap to fix the second metal block 9 in the accommodating groove 110. For example, as shown in fig. 14 to 16, the second metal block 9 has an arc-shaped plate shape, and when the second metal block 9 is disposed in the accommodating groove 110, the arc-shaped outer surface of the second metal block 9 is smoothly connected with the arc-shaped outer surface of the first connecting member 1, so that the overall aesthetic property is improved.

In other embodiments, as shown in fig. 20, the second metal block 9 and the outer sidewall of the first connecting member 1 may be fixedly connected by gluing or the like, so that the second metal block 9 is not displaced when the first connecting member 1 is inserted into the installation channel 101.

In some embodiments, as shown in fig. 33 to 41, the first connecting member 1 of example 1 of the present invention includes a first connecting member body 11 and a mounting post 12 integrally formed with the first connecting member body 11, the first connecting member body 11 includes a first connecting end 111 and a first mounting end 112 opposite to each other, the 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; the first connection hole 114 is located on an outer side wall of the first connector body 11, and 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 reverse teeth 13. When the first connecting piece 1 is a hard plastic piece, the first connecting piece main body 11 and the mounting column 12 form an integrated structure through an injection molding process. The cross-section of the first connector body 11 and the mounting post 12 may be circular or oval or square or other irregular shapes, respectively, and is not limited herein. The number of mounting posts 12 may be one or more.

Further, in order to reduce the overall material and weight of the first connector 1, the number of the mounting posts 12 is preferably one, and the cross-sectional area of the mounting posts 12 is smaller than that of the first connector body 11, and the mounting posts 12 are integrally formed on the end surface of the first mounting end 112. At this time, the structure of the installation channel 101 should be matched with the structure of the first connecting piece 1, as shown in fig. 59-63, that is, the installation channel 101 includes two-stage sub-channels, specifically, a first-stage sub-channel 101a matched with the first connecting piece main body 11 and a second-stage sub-channel 101b matched with the installation column 12, so that the first connecting piece 1 is fitted in the installation channel 101 to reduce the gap of the first connecting piece 1 in the installation channel 101, and increase the contact friction between the first connecting piece 1 and the inner side wall of the installation channel 101, thereby improving the connection firmness of the first connecting piece 1 on the first member 10. The two-stage sub-channel machining of the installation channel 101 may be as follows: firstly, a drill bit (for example, a six-sided drill) is adopted to drill into the side wall of the first component 10 and then slide to machine and form a first-stage sub-channel 101a, then the drill bit is controlled to move to a position corresponding to the second-stage sub-channel 101b and then is screwed downwards to form a second-stage sub-channel 101b, and finally the drill bit is controlled to sequentially move out of the second-stage sub-channel 101b and the first-stage sub-channel 101a, so that the installation channel 101 with two stages of sub-channels is machined on the side wall of the first component 10.

It will be further appreciated that the fastening barbs 13 may be located on the outer side wall of the first connector body 11 as shown in fig. 37, and the outer side wall of the mounting post 12 is of a smooth structure, and the mounting post 12 serves the purpose of positioning to distinguish the position of the first connection hole 114 of the first connector 1. As shown in fig. 40-41, the fastening inverse tooth 13 is located on the outer sidewall of the mounting post 12, and at this time, the outer sidewall of the first connector body 11 is smooth, and the locking effect of the first connector 1 in the mounting channel 101 depends on the friction force between the fastening inverse tooth 13 of the mounting post 12 and the inner sidewall of the second-stage sub-channel 101 b. Or as shown in fig. 33, the outer side wall of the first connector body 11 and the outer side wall of the mounting post 12 are respectively provided with the fastening inverse tooth 13, at this time, the locking effect of the first connector 1 in the mounting channel 101 depends on the fastening inverse tooth 13 of the first connector body 11 and the inner side wall of the first-stage sub-channel 101a, and the friction force between the fastening inverse tooth 13 of the mounting post 12 and the inner side wall of the second-stage sub-channel 101b, at this time, the friction force between the whole first connector 1 and the inner side wall of the mounting channel 101 is large, the first connector 1 can be pulled out from the mounting channel 101 by adopting a large external force, and the detachment is difficult.

Further, in some embodiments, as shown in fig. 35 and 38, in a viewing direction from the first connecting end 111 to the first mounting end 112, the outer sidewall of the first connecting member body 11 is configured to have an axisymmetric shape and has at least two first symmetry axes 117, that is, the outer sidewall of the first connecting member body 11 is configured to have an axisymmetric shape such as a circle, an ellipse, a waist circle, a diamond, or a square, and accordingly, the cross section of the first-stage sub-passage 101a is configured to have an axisymmetric shape having at least two symmetry axes, and when the first connecting member 1 is inserted into the mounting passage 101, in order to ensure that the first connecting hole 114 of the first connecting member body 11 corresponds to and communicates with the first mounting hole 102 of the first member 10, so as to avoid the need of disassembling and reassembling the first connecting member 1 after reverse assembling, the minimum distance between the intersection point of the straight line where the central axis of the mounting post 12 is located and the at least two first symmetry axes 117 is greater than zero, i.e. the straight line in which the central axis of the mounting post 12 is located does not cross the intersection of the at least two first axes of symmetry 117, so that the mounting post 12 is arranged eccentrically on the first mounting end 112.

For example, the first connector body 11 has a cylindrical shape, and the center axis of the mounting post 12 is not aligned with the center axis of the first connector body 11. Accordingly, the central axis of the second-stage sub-passage 101b is not collinear with the central axis of the first-stage sub-passage 101a, and the second-stage sub-passage 101b is eccentric with respect to the first-stage sub-passage 101 a. When the first connecting member 1 is inserted into the installation channel 101, since the installation post 12 is eccentric with respect to the first connecting member body 11 and the second-stage sub-channel 101b is eccentric with respect to the first-stage sub-channel 101a, the operator needs to rotate the first connecting member body 11 to adjust the angle of the first connecting member body 11 in the first-stage sub-channel 101a to smoothly insert the installation post 12 into the second-stage sub-channel 101b, so that the first connection hole 114 and the first installation hole 102 are positioned by the eccentricity of the installation post 12 with respect to the first connecting member body 11, and the first connection hole 114 is ensured to correspond to and be communicated with the first installation hole 102 after the first connecting member 1 is inserted into the installation channel 101. In this case, the two-stage sub-channel machining of the installation channel 101 may be as follows: firstly, adopting a drill bit with the diameter being matched with the first-stage sub-channel 101a to drill into the side wall of the first component 10 and then sliding to machine and form the first-stage sub-channel 101a, and then moving the drill bit out of the first component 10; and then, the drill bit is moved to the position corresponding to the second-stage sub-channel 101b and screwed downwards to form a second-stage sub-channel 101b, and then the drill bit is moved out of the first component 10, so that the eccentric installation channel 101 is machined on the side wall of the first component 10.

Further, in some embodiments, as shown in fig. 62-63, the threaded fastener 4 can be pre-installed in the first attachment hole 114 and installed with the first attachment member 1 on the first member 10, however, since the thickness dimension of the existing furniture panel is about 16mm or 18mm, and accordingly, in order to ensure a strong mounting stability of the first connecting member 1, the thickness dimension of the first connecting member 1 is generally within 14mm or 16mm, therefore, as shown in fig. 34, 36 and 39, in order to ensure that the threaded fastener 4 can be pre-installed in the first connection hole 114 of the first connection member 1 smoothly, the outer side wall of the first connection member 1 of embodiment 1 of the present invention includes a first side surface 115 and a second side surface 116 which are opposite to each other, the first connection hole 114 is opened on the first side surface 115, and the threaded fastener 4 is inserted into the first coupling hole 114 from the first side 115 of the first coupling member 1; setting a distance between the central axis of the first connecting passage 113 and the first lateral surface 115 of the first link 1 to L1, and setting a distance between the central axis of the first connecting passage 113 and the second lateral surface 116 of the first link 1 to L2; wherein L1 and L2 satisfy: l1> L2. It is understood that the first connection passage 113 is disposed near the second lateral side 116 of the first coupling member 1 such that the first connection passage 113 is eccentrically located on the first connection end 111, so that the threaded fastener 4 can be inserted into the first connection hole 114 from the first lateral side 115 and completely placed in the first connection hole 114, and at this time, one end of the threaded fastener 4 is not at a position where the first connection hole 114 communicates with the first connection passage 113, and then the threaded fastener 4 can be inserted into the mounting passage 101 together with the first coupling member 1. After the coupling groove 23 is disposed at a position where the first coupling hole 114 communicates with the first coupling passage 113 after passing through the first coupling passage 113, a tool is used to drive the threaded fastener 4 from the first mounting hole 102 of the first member 10 to rotate in the first coupling hole 114 so that one end of the threaded fastener 4 is inserted into the coupling groove 23, thereby coupling the first coupling member 1 and the second coupling member 2 to each other, and further coupling the first member 10 and the second member 20 to each other.

Further, as shown in fig. 34, when the first connecting passage 113 is disposed close to the second side 116 of the first link 1, the minimum distance between the second side 116 of the first link 1 and the inner side wall of the first connecting passage 113 is set to L3; wherein L3 satisfies: 0.3mm L3 mm 6mm, for example L3 mm 0.3mm, 0.6mm, 0.8mm, 1.0mm, 2.3mm, 3.0mm, 3.5mm, 5.0mm or 6.0mm, etc., so designed as to ensure a relatively large distance between the central axis of the first connecting channel 113 and the first side surface 115 of the first connecting piece 1, with sufficient space for preassembling the threaded fastener 4.

In some embodiments, referring to fig. 41, the outer sidewall of the first connector body 11 is provided with a positioning boss 118. It should be noted that the number of the positioning bosses 118 in embodiment 1 of the present invention may be one or more, for example, two positioning bosses 118 are both provided on the same side of the first connector body 11. Preferably, the number of the positioning bosses 118 is one, and the positioning bosses 118 are integrally formed on the outer side wall of the first connector body 11. The cross section of the positioning boss 118 in embodiment 1 of the present invention may be an arc shape, a square shape, a triangular shape, or the like, which is not limited herein. When the positioning boss 118 interferes with the opening of the first connection hole 114, the positioning boss 118 is formed with a through hole connected to the first connection hole 114, so that the threaded fastener 4 is disposed in the first connection hole 114 after passing through the through hole. Correspondingly, the structure of the first-stage sub-channel 101a of the installation channel 101 is adapted to the first connecting member 1 having the positioning boss 118, that is, the inner side wall of the first-stage sub-channel 101a is formed with a groove structure for accommodating the positioning boss 118, when the first connecting member 1 is inserted into the installation channel 101, the first connecting member 1 can be smoothly inserted into the installation channel 101 only by aligning the positioning boss 118 with the groove of the inner side wall of the first-stage sub-channel 101a, when the first connecting member 1 is completely placed in the installation channel 101, the position of the first connecting hole 114 corresponds to the position of the first installation hole 102 and is communicated with the same, and the positioning boss 118 serves the purpose of mutual positioning between the first connecting hole 114 and the first installation hole 102. In addition, the technical solution of the embodiment 1 of the present invention that the positioning boss 118 is provided on the outer sidewall of the first connector body 11 and the technical solution that the mounting post 12 is eccentrically provided with respect to the first connector body 11 can coexist at the same time.

Further, embodiment 1 of the present invention does not limit the specific shape or material of the second connection member 2, for example, the second connection member 2 may have a square column structure or a cone structure. The second connecting member 2 may be made of metal or hard material, preferably metal, and has strong tension bearing capacity and gravity bearing capacity. In some embodiments, as shown in fig. 42-58, the second connector 2 of example 1 of the present invention has a structure similar to the connecting rod structure of the prior art four-in-one connector, i.e., the second connector 2 has a second connecting end 21 and a second mounting end 22 opposite to each other, the connecting groove 23 is located on the second connecting end 21, and the second mounting end 22 is used for being detachably connected to the second member 20. In order to avoid the need to adjust the position of the connecting groove 23 after the second mounting end 22 is mounted on the second member 20, the connecting groove 23 in embodiment 1 of the present invention is an annular groove circumferentially disposed along the outer peripheral wall of the second connecting end 21, so as to avoid the trouble of positioning the connecting groove 23 at the position where the first connecting hole 114 communicates with the first connecting channel 113, and improve the assembling efficiency.

The connection between the second mounting end 22 of the second connector 2 and the second member 20 will be described in detail.

As a first detachable connection manner of the second mounting end 22 of the second connector 2 and the second member 20, as shown in fig. 42 to 54, a first mounting male screw portion 221 is formed at an outer side wall of the second mounting end 22. When the connecting device is used, a second mounting hole 201 is formed in the surface of the second member 20, the diameter of the second mounting hole 201 is smaller than the diameter of the outer contour of the first mounting external thread portion 221, the second mounting end 22 is inserted into the second mounting hole 201 and rotated, the first mounting external thread portion 221 is self-tapping screwed into the second mounting hole 201, so that an internal thread structure is formed on the inner side wall of the second mounting hole 201, and the second mounting external thread portion 25 and the internal thread in the second mounting hole 201 are mutually engaged to firmly connect one end of the second connecting piece 2 to the second member 20. The end of the second mounting end 22 is sharp, so that the second mounting end 22 can be easily self-tapping connected into the second mounting hole 201.

As a second detachable connection manner of the second mounting end 22 of the second connector 2 and the second member 20, as shown in fig. 55, a first mounting external thread part 221 is formed on an outer side wall of the second mounting end 22, and the connection assembly according to embodiment 1 of the present invention further includes an expansion nut 5, and a structure of the expansion nut 5 is completely the same as that of the expansion nut 5 of the prior art four-in-one connector, and the description of the structure of the expansion nut 5 is omitted here. The second mounting end 22 is rotatably provided inside the expansion nut 5 for driving the outer circumferential wall of the expansion nut 5 to expand outwardly, so that the second mounting end 22 is connected to the second member 20 through the expansion nut 5. When the connecting piece is used, the second mounting hole 201 is formed in the surface of the second member 20, the diameter of the second mounting hole 201 is larger than the diameter of the outer contour of the expansion nut 5, the expansion nut 5 is pre-embedded in the second mounting hole 201 through clearance fit, the second mounting end 22 is rotatably inserted into the expansion nut 5 (namely, the first mounting external thread portion 221 is in matched threaded connection with the internal thread structure of the expansion nut 5), so that when the second connecting piece 2 rotates, the second mounting end 22 drives the outer peripheral wall of the expansion nut 5 to gradually expand radially outwards and abut against the inner side wall of the second mounting hole 201, and the second mounting end 22 is firmly connected with the second member 20 through the expansion nut 5.

In some embodiments, in order to enable the two second mounting ends 22 to rotate, in the prior art, a straight groove, a cross groove, an internal hexagonal groove, or the like is generally formed in an end surface of the second connecting end 21, and the second connecting end 21 is driven to rotate by a screwdriver or an internal hexagonal wrench to drive the second mounting end 22 to rotate. In other embodiments, as shown in fig. 42-55, the second connector 2 is fixedly provided with an operating portion 24 between the second connecting end 21 and the second mounting end 22, the operating portion 24 has at least one first operating plane or first operating hole or first operating bump or first operating groove, or the cross section of the operating portion 24 is adapted to the cross section of the sleeve. Thus, the second connecting part 2 is fixedly provided with the operating part 24 between the second connecting end 21 and the second mounting end 22, the operating part 24 is driven to rotate by acting on the operating part 24 through an external tool, so that the second connecting part 2 is driven to integrally rotate, and the second mounting end 22 is further driven to rotate, thereby avoiding that a straight groove, a cross groove or an inner hexagonal groove and the like are formed in the end face of the end part of the second connecting end 21 in the prior art, enabling the diameter size design of the end part of the second connecting end 21 to be smaller, and further reducing the cross sectional area of the first connecting channel 113; in addition, the threaded fastener 4 with smaller diameter can be selected to be matched and inserted with the connecting groove 23 of the second connecting end 21, so that the aperture of the first mounting hole 102 on the first component 10 is smaller, and the attractiveness of a finished furniture product is improved.

It will be further understood that, in order to ensure that the external tool can drive the operation portion 24 to rotate to drive the second connecting member 2 to rotate, the operation portion 24 is integrally formed on the second connecting member 2, the cross section of the operation portion 24 needs to be designed to be non-circular or the operation portion 24 needs to be designed to be non-cylindrical. For example, as shown in fig. 42, 44, 45, 44, 50, 54, the side wall of the operation portion 24 has at least one first operation plane, the number of the first operation planes may be one or two or four or six, etc., and an external tool such as a vice or other pliers or a wrench is used to clamp the operation portion 24 to drive the operation portion 24 to rotate. For example, the side wall of the operation portion 24 has a first operation hole, and an external tool such as a screwdriver, a metal rod, or an allen wrench is inserted into the first operation hole to drive the operation portion 24 to rotate. For example, as shown in fig. 46 and 47, the side wall of the operation portion 24 has a first operation protrusion or a first operation recess, and the first operation protrusion or the first operation recess is clamped by an external tool such as a vice or a wrench to drive the operation portion 24 to rotate. As shown in fig. 42, 44, 45, 48, 49, 51 and 52, the cross section of the operating part 24 is adapted to the cross section of the socket, in which case the external tool driving the operating part 24 to rotate is a socket wrench, wherein the socket wrench is a tool commonly used in the art, such as a manual socket wrench of the national standard GB T3390.1-2004, or other national standard manual or electric wrench, the cross section of the socket is non-circular, including but not limited to triangular or square or hexagonal or octagonal or oval or kidney-round or petal-shaped, so that the socket wrench can drive the operating part 24 and the socket to synchronously rotate in the process of driving the socket to rotate, thereby integrally rotating the second connecting piece 2, and the second mounting end 22 is rotated to securely attach the second mounting end 22 to the second member 20 or the second mounting end 22 is securely attached to the second member 20 by the expansion nut 5.

Further, as shown in fig. 43, when the second connecting member 2 is a cylindrical structure and has the operating portion 24, the diameter of the end of the second connecting end 21 is set to be D1, and the diameter of the ring-shaped connecting groove 23 is set to be D2, wherein, in order to reduce the overall volume of the second connecting member 2 to improve the invisibility, 2.0mm ≦ D1 ≦ 8.5mm, 1.8mm ≦ D2 ≦ 8.5mm, wherein D1 and D2 need to satisfy the relationship of D1 > D2 for adaptive design, that is, satisfy the relationship of table 1 below:

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

TABLE 1

As a third detachable connection manner of the second mounting end 22 of the second connector 2 and the second member 20, as shown in fig. 56 to 58, the structure of the second connector 2 of 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 male screw portion 25 between the second connecting end 21 and the second mounting end 22. Further, the connection manner between the second connector 2 and the second member 20 according to embodiment 1 of the present invention is specifically as follows: the connecting assembly in embodiment 1 of the invention further comprises an expansion body 6, wherein a conical channel 63 is formed inside the expansion body 6; the conical part is arranged in the conical channel 63 in a sliding manner; the second mounting external thread part 25 is in matched threaded connection with a rotating body 7 with internal threads; the outer side wall of the rotating body 7 is provided with at least one second operating plane or a second operating hole or a second operating convex point or a second operating groove, or the cross section of the rotating body 7 is matched with the cross section of the sleeve; when the rotating body 7 is driven to rotate by an external tool, the tapered portion slides in the tapered channel 63 for a certain distance to expand the outer peripheral wall of the expansion body 6 outward, so that the second mounting end 22 is locked in the second mounting hole 201 of the second member 20 by the expansion body 6. Wherein the outer circumferential side wall of the expansion body 6 is formed with a fastening boss to increase the locking effect between the outer circumferential side wall of the expansion body 6 and the second mounting hole 201. The tapered portion has a larger cross-sectional area at one end than at the other end, and may be, for example, a truncated cone shape or a tapered frustum shape, or may be a non-tapered protrusion shape, as long as the tapered portion can expand the outer circumferential sidewall of the expansion body 6 radially outward after sliding in the tapered passage 63, and the shape of the tapered portion is not particularly limited. The conical portion is preferably in the form of a circular truncated cone, for example, and is integrally formed at an end of the second connecting member 2 remote from the connecting groove 23, in which case the inner peripheral wall of the conical channel 63 is also in the form of a circular truncated cone. The structure of the rotating body 7 in embodiment 1 of the present invention is similar to the structure of the operating portion 24, and the structure and driving principle of the rotating body 7 will be omitted.

Further, in order to smoothly place the tapered portion in the tapered passage 63 of the expansion body 6, the expansion body 6 may be formed by splicing a plurality of sub-members, for example, as shown in fig. 57, the expansion body 6 includes a first sub-member 61 and a second sub-member 62, the first sub-member 61 is provided with a first tapered groove, the second sub-member 62 is provided with a second tapered groove, and when the first sub-member 61 and the second sub-member 62 are connected to each other, the first tapered groove and the second tapered groove are spliced with each other to form the tapered passage 63. Before the first sub-part 61 is connected with the second sub-part 62, the tapered part is arranged in the first tapered groove or the second tapered groove in advance through clearance fit, one end with a larger cross-sectional area of the tapered part is arranged in the first tapered groove or the other end with a larger cross-sectional area of the second tapered groove, and one end with a smaller cross-sectional area of the tapered part is arranged in the first tapered groove or the other end with a smaller cross-sectional area of the second tapered groove, so that the tapered part is arranged in the tapered channel 63 and can slide in the tapered channel 63 after the first sub-part 61 is connected with the second sub-part 62. Further, the expansion body 6 and the tapered portion may be of a separate structure, that is, the tapered portion is mounted inside the expansion body 6 formed by the first sub-member 61 and the second sub-member 62 being combined together when in use, and then the expansion body 6 is inserted into the first mounting hole 102 of the first member 10. The expansion body 6 and the tapered portion may be in a connection structure, that is, after the first sub-part 61 and the second sub-part 62 are combined, the first sub-part and the second sub-part are fixed by means of snap or gluing, so that the tapered portion is limited in the tapered channel 63, and the expansion body 6 and the tapered portion form a connection structure.

When the expansion tool is used, the surface of the second member 20 is provided with the second mounting hole 201, 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 arranged in the second mounting hole 201 of the second member 20 through clearance fit, when the external tool drives the rotating body 7 to rotate, the second connecting piece 2 slides along a straight line through the threaded connection between the internal thread of the rotating body 7 and the second mounting external thread part 25, the conical part is driven to slide in the conical channel 63, so that the end with the larger cross-sectional area of the conical part gradually slides towards the end with the smaller cross-sectional area of the conical channel 63, the interference fit between the conical part and the inner peripheral wall of the conical channel 63 is gradually changed, the conical part abuts against the inner wall of the conical channel 63, and the outer peripheral wall of the expansion body 6 gradually expands outwards in the radial direction and is tightly engaged with the inner side wall of the second mounting hole 201 of the second member 20, and the second mounting end 22 is connected to the second member 20 by the expansion body 6.

In some embodiments, as shown in fig. 21 to 24 and 53 to 54, a recess 211 is formed on the outer circumferential wall of the second connection end 21 so that the second connection end 21 is stepped, and the connection groove 23 is opened on the recess 211. Accordingly, the first connection passage 113 is also stepped at a position corresponding to the second connection end 21 to increase the depth of the first connection hole 114, so that the threaded fastener 4 has enough space in the first connection hole 114 to be pre-installed in the first connection hole 114, thereby facilitating the insertion of the threaded fastener 4 into the installation passage 101 along with the first connection member 1 and improving the assembly efficiency.

In some embodiments, when the first connector 1 is connected with the second connector 2, i.e., after the end of the second connector 2 having the connection groove 23 is inserted into the first connection passage 113, there may be the following cases: the connection groove 23 is not sufficiently located at a position where the first connection hole 114 communicates with the first connection passage 113, which causes a gap between the side of the first member 10 and the surface of the second member 20, affecting the aesthetic property. Therefore, as shown in fig. 43, a correction inclined portion 231 is formed at a position where the inner side wall of the connection groove 23 is connected with the groove bottom of the connection groove 23, for example, the correction inclined portion 231 makes the inner side wall of the connection groove 23 in an inclined surface shape, so that when the threaded fastener 4 slides in the first connection hole 114 and the end portion of the threaded fastener 4 abuts against the correction inclined portion 231, the end portion of the threaded fastener 4 drives the second connector 2 to further slide in the first connection channel 113, thereby driving the second member 20 to move toward the first member 10, so that the surface of the second member 20 abuts against the side surface of the first member 10, preventing a gap from being generated between the first member 10 and the second member 20, and improving the appearance.

Based on the above-mentioned connection assembly according to embodiment 1 of the present invention, the first member 10 and the second member 20 of the present invention are connected to each other by the connection assembly according to embodiment 1 of the present invention to form a connection system, which is specifically shown in fig. 64-65 and includes the first member 10, the second member 20, the first connection member 1, the second connection member 2 and the threaded fastener 4; for the structures of the first connecting member 1, the second connecting member 2 and the threaded fastener 4, reference is made to the above description of embodiment 1 of the present invention, and further description is omitted here. One side of the first member 10 is provided with an installation channel 101 for accommodating a first connecting piece 1, the first connecting piece 1 is inserted into the installation channel 101, and the top of the first member 10 is provided with a first installation hole 102 communicated with a first connection hole 114; a second mounting hole 201 is formed in one side of the second member 20, and one end (i.e., the second mounting end 22) of the second connector 2, which is far away from the connecting groove 23, is mounted in the second mounting hole 201. Specifically, one side of the first member 10 is opened with a mounting channel 101, and the top (or bottom) of the first member 10 is opened with a first mounting hole 102 communicating with the mounting channel 101, 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 communicates with the position of the first mounting hole 102. For the way of mounting the end of the second connecting member 2 away from the connecting groove 23 in the second mounting hole 201 of the second member 20, please refer to the connection way between the second mounting end 22 and the second member 20 in embodiment 1 of the present invention, and further description is omitted here. When the fastening member 4 is installed, the fastening member 4 may be pre-installed in the first connection hole 114 and inserted into the installation channel 101 together with the first connecting member 1, so that the position of the first connection hole 114 corresponds to and is communicated with the position of the first installation hole 102, and an operator may drive the fastening member 4 to rotate in the first connection hole 114 after passing through the first installation hole 102 from the outside of the first member 10 by using a tool such as a screwdriver, so as to insert one end of the fastening member 4 into the connection groove 23, thereby limiting the second connecting member 2 from being pulled out of the first connection channel 113, and further firmly connecting the first member 10 and the second member 20 to each other.

Further, as shown in fig. 59-63, when the first connecting member 1 includes the first connecting member body 11 and the mounting post 12, the mounting channel 101 includes a first-stage sub-channel 101a and a second-stage sub-channel 101b that are communicated with each other, the first-stage sub-channel 101a has a shape that is matched with the shape of the first connecting member body 11 for accommodating the first connecting member body 11, and the second-stage sub-channel 101b has a shape that is matched with the shape of the mounting post 12 for accommodating the mounting post 12, so as to reduce a gap between an outer sidewall of the first connecting member 1 and an inner sidewall of the mounting channel 101, and improve the firmness and stability of the first connecting member 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 an axisymmetric pattern or a non-axisymmetric pattern, the cross section of the first-stage sub-passage 101a may be an axisymmetric pattern and have at least two second axes of symmetry, and when the first connector 1 is inserted into the installation passage 101, it is necessary to distinguish the installation direction of the first connector body 11 in the first-stage sub-passage 101a to ensure that the position of the first connection hole 114 corresponds to and communicates with the position of the first installation hole 102 after the first connector 1 is inserted into the installation passage 101, and to avoid the need of disassembling and reassembling after the first connector 1 is reversely assembled, for this reason, the minimum distance between the straight line of the central axis of the second-stage sub-passage 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-stage sub-passage 101b is not on the same straight line with the central axis of the first-stage sub-passage 101a, the second-stage sub-passage 101b is eccentric with respect to the first-stage sub-passage 101a, for example, the cross section of the first-stage sub-passage 101a and the cross section of the second-stage sub-passage 101b are circular, and the central axis of the first-stage sub-passage 101a and the central axis of the second-stage sub-passage 101b are not on the same straight line. Accordingly, the central axis of the mounting post 12 is not aligned with the central axis of the first connector body 11, i.e., the mounting post 12 is eccentrically disposed with respect to the first connector body 11. The operator needs to rotate the first connector body 11 to adjust the angle of the first connector body 11 in the first-stage sub-channel 101a, and then the mounting post 12 can be smoothly inserted into the second-stage sub-channel 101b, so that the first connecting hole 114 and the first mounting hole 102 can be positioned by the eccentricity of the mounting post 12 relative to the first connector body 11, and it is ensured that the first connecting hole 114 is communicated with the first mounting hole 102 after the first connector 1 is inserted into the mounting channel 101.

In addition, the first member 10 and the second member 20 of the connection system of embodiment 1 of the present invention may be connected to each other by one or more connection assemblies, so the present invention does not limit the number of connection assemblies between the first member 10 and the second member 20, and may be designed according to practical applications.

Based on the above-described connecting assembly according to embodiment 1 of the present invention, the method for mounting the first member 10 and the second member 20 by using the above-described connecting assembly includes the steps of:

s100, a mounting channel 101 is formed at one side of the first member 10, and a first mounting hole 102 communicating with the mounting channel 101 is formed at the top of the first member 10. For example, a hexahedral drill or a common drill is used to drill into one side of the first member 10 and slide a certain distance to form the mounting channel 101, and then the drill is used to machine the first mounting hole 102 at the top (or bottom) of the first member 10, wherein the hole diameter of the first mounting hole 102 may be the same as or slightly larger than the diameter of the threaded fastener 4, or the hole diameter of the first mounting hole 102 is used for a tool for rotating the threaded fastener 4 to pass through, the hole diameter of the first mounting hole 102 of embodiment 1 of the present invention is much smaller than the hole diameter of the first mounting hole 102 machined on the first member 10 by using a four-in-one connector in the prior art, so as to improve the invisibility of the connecting assembly of embodiment 1 of the present invention and improve the aesthetic property of the finished furniture.

Further, when the first connector 1 comprises the first connector body 11 and the mounting post 12, the mounting channel 101 comprises a first-stage sub-channel 101a and a second-stage sub-channel 101b which are communicated with each other, the cross section of the first-stage sub-channel 101a is an axisymmetric figure and has at least two second symmetry axes, the minimum distance between the straight line where the central axis of the second-stage sub-channel 101b is located and the intersection point of the at least two second symmetry axes is greater than zero, i.e., the central axis of the second-stage sub-passage 101b is not collinear with the central axis of the first-stage sub-passage 101a, the second-stage sub-passage 101b is eccentric with respect to the first-stage sub-passage 101a, for example, the cross section of the first-stage sub-passage 101a and the cross section of the second-stage sub-passage 101b are circular, and the central axis of the first-stage sub-passage 101a and the central axis of the second-stage sub-passage 101b are not collinear. Therefore, the operator needs to rotate the first connecting member body 11 to adjust the angle of the first connecting member body 11 in the first-stage sub-channel 101a and then smoothly insert the mounting post 12 into the second-stage sub-channel 101b, so that the first connecting hole 114 and the first mounting hole 102 are positioned by the eccentricity of the mounting post 12 relative to the first connecting member body 11, and the first connecting hole 114 is communicated with the first mounting hole 102 after the first connecting member 1 is inserted into the mounting channel 101.

And S200, mounting one end of the second connecting piece 2 far away from the connecting groove 23 on one side of the second member 20. For the mounting manner of the end of the second connecting member 2 away from the connecting groove 23 and the second member 20, please refer to the connection manner between the second mounting end 22 and the second member 20 in embodiment 1 of the present invention, and further description is omitted here.

S300, inserting the first connecting piece 1 into the mounting channel 101 and communicating the first connecting hole 114 with the first mounting hole 102, inserting one end of the second connecting piece 2 with the connecting groove 23 into the first connecting channel 113 and placing at least one part of the connecting groove 23 at a position where the first connecting channel 113 is communicated with the first connecting hole 114, driving 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 limit the second connecting piece 2 to slide in the first connecting channel 113, and thus connecting the first member 10 and the second member 20 with each other. Wherein, the threaded fastener 4 can be pre-installed in the first connecting hole 114 and inserted into the installation channel 101 simultaneously with the first connecting member 1, and the first connecting hole 114 is communicated with the first installation hole 102, and then a tool is used to drive the threaded fastener 4 from the first installation hole 102 to rotate in the first connecting hole 114 so that one end of the threaded fastener 4 is inserted into the connection groove 23, so that the operation is more convenient and the assembly time is shortened. Further, the threaded fastener 4 may be installed separately from the first coupling member 1, that is, after the first coupling member 1 is inserted into the installation passage 101 alone to make the first connection hole 114 communicate with the first installation hole 102, the threaded fastener 4 is then inserted into the first connection hole 114 through the first installation hole 102, and then a tool is used to drive the threaded fastener 4 from the first installation hole 102 to rotate in the first connection hole 114 so that one end of the threaded fastener 4 is inserted into the connection recess 23; in addition, it is possible to drive the threaded fastener 4 with a tool to rotate so that the external thread of the threaded fastener 4 forms an internal thread structure to the inner side wall of the first mounting hole 102 (the diameter of the first mounting hole 102 is slightly smaller than the outer circumferential diameter of the threaded fastener 4), and then drive the threaded fastener 4 to rotate in the first connecting hole 114 so that one end of the threaded fastener 4 is inserted into the connecting recess 23, so that the threaded fastener 4 is inserted into the connecting recess 23 by engaging the first connecting hole 114 with the thread while the first mounting hole 102 is engaged with the thread.

It should be further noted that the order of the above steps S100 and S200 may be interchanged.

In addition, referring to the reverse operation of S300, the first member 10 and the second member 20 of embodiment 1 of the present invention are mutually separated, that is, the threaded fastener 4 is firstly pulled out from the connecting groove 23 to release the locking of the threaded fastener 4 to the second connecting member 2, so that the end of the second connecting member 2 having the connecting groove 23 can be pulled out from the first connecting channel 113 and separated from the second member 20, thereby mutually separating the first member 10 and the second member 20.

Example 2

In view of the technical problem of low invisibility of the fixing pin of the prior art four-in-one connector to the finished furniture, as shown in fig. 66 to 74, embodiment 2 of the present invention provides a connecting assembly similar to the connecting assembly of embodiment 1 above, except that: the connecting assembly of embodiment 2 of the present invention includes a third connecting member 3 in addition to the first connecting member 1, the second connecting member 2, and the threaded fastener 4 of embodiment 1, and 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 shown in fig. 75 to 81, the outer side wall of the third connecting member 3 is formed with a third connecting passage 31, and one end of the third connecting member 3 is formed with a third connecting hole 32 communicated with the third connecting passage 31. It should be noted that, for the specific structures, materials, or shapes of the first connecting member 1, the second connecting member 2, and the threaded fastener 4 in embodiment 2 of the present invention, reference is made to the specific descriptions of the specific structures, materials, or shapes of the first connecting member 1, the second connecting member 2, and the threaded fastener 4 in embodiment 1 above, and the detailed descriptions are omitted here.

Further, the connection relationship among the first connecting member 1, the second connecting member 2, the third connecting member 3 and the threaded fastener 4 of the connecting assembly according to embodiment 2 of the present invention is specifically as follows: as shown in fig. 66 to 74, the third connecting member 3 is inserted into the first connecting hole 114 and makes the third connecting channel 31 communicate with the first connecting channel 113, one end of the second connecting member 2 is inserted into the first connecting channel 113 and makes at least a portion of the connecting groove 23 be disposed at a position where the third connecting channel 31 communicates with the third connecting hole 32; the threaded fastener 4 is threadedly coupled into the third coupling hole 32, and the threaded fastener 4 slides within the third coupling hole 32 so that one end of the threaded fastener 4 is inserted into the coupling groove 23. Wherein, the material of third connecting piece 3 can be metal material or rigid plastic material, for example when third connecting piece 3 is the metal material, for example adopt the screw tap to be formed with the internal thread structure at the inside wall of third connecting hole 32 through the tapping mode, threaded fastener 4 through with the internal thread structure cooperation threaded connection of third connecting hole 32 inside wall in order to realize threaded fastener 4 threaded connection in third connecting hole 32. For another example, when the third connecting member 3 is made of hard plastic, the third connecting member 3 is integrally formed with a thread made of metal on the inner side wall of the third connecting hole 32 in the injection molding process, and the threaded fastener 4 is in threaded connection with the thread on the inner side wall of the third connecting hole 32 in a matching manner so as to achieve threaded connection of the threaded fastener 4 in the third connecting hole 32.

Based on the above solution, compared with the four-in-one connector in the prior art, the connection assembly in embodiment 2 of the present invention, the third connector 3 in embodiment 2 of the present invention can be pre-installed in the first connection hole 114 and the third connection channel 31 is communicated with the first connection channel 113, which avoids the trouble of positioning the fixing pin in the first installation hole 102 during the assembly of the four-in-one connector in the prior art, and is more convenient and faster to operate, thereby effectively shortening the assembly time of the connection assembly on the first member 10 and the second member 20. Meanwhile, when the first installation hole 102 is formed in the first member 10, the design is not required according to the diameter size of the third connecting piece 3 (namely, the diameter size of the fixing pin in the prior art), and only the hole diameter of the first installation hole 102 is required to be passed through by the threaded fastener 4 and inserted into the third connecting hole 32, so that the hole diameter of the first installation hole 102 is greatly reduced to improve the invisibility of the connecting component in the first member 10 and the second member 20, and the attractiveness of the finished furniture is improved. In addition, the threaded fastener 4 of the present invention can be pre-installed in the third connecting hole 32 (as shown in fig. 67), so that the first installation hole 102 can be small enough to pass a tool for rotating the threaded fastener 4; and then, a tool such as a screwdriver is adopted to pass through the first mounting hole 102 and drive the threaded fastener 4 to rotate in the third connecting hole 32, so that compared with the prior art that the threaded fastener 4 needs to be inserted into the third connecting hole 32 from the outside of the first member 10 during assembly of the four-in-one connector, the operation is more convenient and quicker, the assembly time of the connecting assembly on the first member 10 and the second member 20 is effectively shortened, and the assembly efficiency between the first member 10 and the second member 20 is improved.

In some embodiments, the fixing pin of the existing four-in-one connector is generally in a cylinder structure, and the third connector 3 of embodiment 2 of the present invention is preferably in a cylinder structure, and accordingly, the cross section of the first mounting hole 102 is a circular hole adapted to the third connector 3. However, the cylindrical third connecting member 3 needs to adjust the installation angle in the first connecting hole 114 to ensure that the third connecting channel 31 is communicated with the first connecting channel 113, usually a groove is formed at the end of the third connecting member 3, and a tool such as a coin or a thin plate is inserted into the groove to adjust the angle of the third connecting member 3 in the first connecting hole 114, but since the axial depth of the first connecting channel 113 is large, it is difficult to judge that the first connecting channel 113 is communicated with the third connecting channel 31 by naked eyes, which has a technical problem of great difficulty in adjustment, and meanwhile, frequently adjusting the position of the third connecting member 3 in the first connecting hole 114 many times easily results in lowering the assembly efficiency. For this, as shown in fig. 77 to 81, the outer side wall of the third connecting member 3 of embodiment 2 of the present invention has at least one positioning flat 33 or positioning convex point or positioning concave groove, or the cross section of the third connecting member 3 is oval or oval; the shape of the inner sidewall of the first connection hole 114 and the shape of the outer sidewall of the third connection element 3 are matched, that is, one side of the inner sidewall of the first connection hole 114 is planar, groove-shaped, bump-shaped, or the like. Thus, when the third connecting element 3 is inserted into the first connecting hole 114, the outer side wall of the third connecting element 3 is matched and inserted with the inner side wall of the first connecting hole 114, so that the first connecting channel 113 and the third connecting channel 31 can be quickly communicated, the trouble of angle adjustment of the third connecting element 3 in the first connecting hole 114 is avoided, and the assembly efficiency of the connecting element of embodiment 2 of the invention is improved.

In some embodiments, when the first member 10 or the second member 20 is subjected to a large gravity load, the end of the second connection member 2 having the connection groove 23 is subjected to a large bending moment in the third connection channel 31 to bend, which may easily cause the connection groove 23 to move greatly at the connection position between the third connection channel 31 and the third connection hole 32, so that the connection groove 23 is separated from the threaded fastener 4, and at this time, the end of the second connection member 2 having the connection groove 23 is easily pulled out from the first connection channel 113, resulting in poor connection firmness and stability between the first member 10 and the second member 20. For this, both ends of the third connecting channel 31 respectively penetrate through opposite sides of the third connecting member 3, one end of the second connecting member 2 penetrates through the third connecting channel 31 and protrudes outside the third connecting member 3, and at least a portion of the connecting groove 23 is located at a position where the third connecting channel 31 communicates with the third connecting hole 32. Therefore, when the end of the second connecting member 2 having the connecting groove 23 is bent by being subjected to a large bending moment in the third connecting passage 31, the end of the second connecting member 2 abuts against the inner side wall of the end of the third connecting passage 31, so that the moving distance of the connecting groove 23 at the communicating position between the third connecting passage 31 and the third connecting hole 32 is limited, the connecting groove 23 is prevented from being separated from the threaded fastener 4, and the connection firmness and stability of the first member 10 and the second member 20 in the using process are improved. In addition, when one end of the second connector 2 and the inner sidewall of one end of the third connecting passage 31 abut against each other, the gravity load bearing capacity of the first member 10 or the second member 20 can be further improved.

Further, as shown in fig. 43 and 76, when the second connecting member has the operating portion 24 and the third connecting member 3 is a cylindrical structure, the diameter of the end of the second connecting end 21 is D1, the diameter of the annular connecting groove 23 is D2, and the diameter of the third connecting member is D3, wherein in order to reduce the overall volume of the second connecting member 2 to improve the invisibility, D1 is not less than 2.0mm and not more than 8.5mm, D2 is not less than 1.8mm and not more than 8.5mm, D3 is not more than 4.5mm and not more than 9.5mm, wherein D3, D1 and D2 are adapted to satisfy the relationship of D3 and not less than D1 > D2, that is, the relationship of the following table 2:

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

TABLE 2

Based on the above-mentioned connection assembly according to embodiment 2 of the present invention, the first member 10 and the second member 20 of the present invention are connected to each other by the connection assembly according to embodiment 2 of the present invention to form a connection system, which is specifically shown in fig. 84-85 and includes the first member 10, the second member 20, the first connection member 1, the second connection member 2, the third connection member 3 and the threaded fastening member 4; for the structures of the first connecting member 1, the second connecting member 2, the third connecting member 3 and the threaded fastener 4, reference is made to the description of embodiment 2 of the present invention, and further description is omitted here. One side of the first member 10 is provided with an installation channel 101 for accommodating a first connecting piece 1, the first connecting piece 1 is inserted into the installation channel 101, and the top of the first member 10 is provided with a first installation hole 102 communicated with a first connection hole 114; a second mounting hole 201 is formed in one side of the second member 20, and one end (i.e., the second mounting end 22) of the second connector 2, which is far away from the connecting groove 23, is mounted in the second mounting hole 201. Specifically, one side of the first member 10 is opened with a mounting channel 101, and the top (or bottom) of the first member 10 is opened with a first mounting hole 102 communicating with the mounting channel 101, 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 communicates with the position of the first mounting hole 102. For the way of installing the end of the second connecting member 2 far from the connecting groove 23 in the second installing hole 201 of the second member 20 in embodiment 2 of the present invention, please refer to the way of connecting the second installing end 22 and the second member 20 in embodiment 1, and further description is omitted here. When the connecting device is installed, the third connecting member 3 is pre-installed in the first connecting hole 114 and inserted into the installation channel 101 together with the first connecting member 1, so that the position of the first connecting hole 114 corresponds to and is communicated with the position of the first installation hole 102, and an operator can drive the threaded fastener 4 to rotate in the third connecting hole 32 after passing through the first installation hole 102 from the outside of the first member 10 by using a tool such as a screwdriver, so that one end of the threaded fastener 4 is inserted into the connecting groove 23, thereby limiting the second connecting member 2 from being pulled out of the first connecting channel 113, and further firmly connecting the first member 10 and the second member 20 with each other.

Further, as shown in fig. 82 to 83, when the first connecting member 1 includes the first connecting member main body 11 and the mounting post 12, the mounting channel 101 includes a first-stage sub-channel 101a and a second-stage sub-channel 101b that are communicated with each other, the first-stage sub-channel 101a has a shape that is matched with the shape of the first connecting member main body 11 for accommodating the first connecting member main body 11, and the second-stage sub-channel 101b has a shape that is matched with the shape of the mounting post 12 for accommodating the mounting post 12, so as to reduce a gap between an outer side wall of the first connecting member 1 and an inner side wall of the mounting channel 101, and improve the firmness and stability of the first connecting member 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 an axisymmetric pattern or a non-axisymmetric pattern, the cross section of the first-stage sub-passage 101a may be an axisymmetric pattern and have at least two second axes of symmetry, and when the first connector 1 is inserted into the installation passage 101, it is necessary to distinguish the installation direction of the first connector body 11 in the first-stage sub-passage 101a to ensure that the position of the first connection hole 114 corresponds to and communicates with the position of the first installation hole 102 after the first connector 1 is inserted into the installation passage 101, and to avoid the need of disassembling and reassembling after the first connector 1 is reversely assembled, for this reason, the minimum distance between the straight line of the central axis of the second-stage sub-passage 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-stage sub-passage 101b is not on the same straight line with the central axis of the first-stage sub-passage 101a, the second-stage sub-passage 101b is eccentric with respect to the first-stage sub-passage 101a, for example, the cross section of the first-stage sub-passage 101a and the cross section of the second-stage sub-passage 101b are circular, and the central axis of the first-stage sub-passage 101a and the central axis of the second-stage sub-passage 101b are not on the same straight line. Accordingly, the central axis of the mounting post 12 is not aligned with the central axis of the first connector body 11, i.e., the mounting post 12 is eccentrically disposed with respect to the first connector body 11. The operator needs to rotate the first connector body 11 to adjust the angle of the first connector body 11 in the first-stage sub-channel 101a, and then the mounting post 12 can be smoothly inserted into the second-stage sub-channel 101b, so that the first connecting hole 114 and the first mounting hole 102 can be positioned by the eccentricity of the mounting post 12 relative to the first connector body 11, and it is ensured that the first connecting hole 114 is communicated with the first mounting hole 102 after the first connector 1 is inserted into the mounting channel 101.

In addition, the first member 10 and the second member 20 of the connection system of embodiment 2 of the present invention can be connected to each other by one or more connection assemblies, so the present invention does not limit the number of connection assemblies between the first member 10 and the second member 20, and can be designed according to practical use.

Based on the above-mentioned connection assembly of embodiment 2 of the present invention, the installation method of the connection assembly for the first member 10 and the second member 20 includes the following steps:

s100', a mounting channel 101 is formed at one side of the first member 10, and a first mounting hole 102 communicating with the mounting channel 101 is formed at the top of the first member 10. For example, a hexahedral drill or a common drill is used to drill into one side of the first member 10 and slide a certain distance to form the mounting channel 101, and then the drill is used to machine the first mounting hole 102 at the top (or bottom) of the first member 10, wherein the hole diameter of the first mounting hole 102 may be the same as or slightly larger than the diameter of the threaded fastener 4, or the hole diameter of the first mounting hole 102 is used for a tool for rotating the threaded fastener 4 to pass through, the hole diameter of the first mounting hole 102 of embodiment 2 of the present invention is much smaller than the hole diameter of the first mounting hole 102 machined on the first member 10 by using a four-in-one connector in the prior art, so as to improve the invisibility of the connecting assembly of embodiment 2 of the present invention and the aesthetic property of the finished furniture.

S200', mounting an end of the second connector 2 away from the connection groove 23 to a side of the second member 20. For the mounting manner of the end of the second connecting member 2 away from the connecting groove 23 and the second member 20 in embodiment 2 of the present invention, please refer to the connection manner between the second mounting end 22 and the second member 20 in embodiment 1, and further description is omitted here.

S300', inserting the first connection member 1 into the installation channel 101 and communicating the first connection hole 114 with the first installation hole 102, inserting the end of the second connection member 2 having the connection groove 23 into the first connection channel 113 and placing at least a portion of the connection groove 23 at a position where the first connection channel 113 communicates with the first connection hole 114, driving the threaded fastener 4 to rotate from the first installation hole 102 so that the end of the threaded fastener 4 is inserted into the connection groove 23 to restrict the second connection member 2 from sliding in the first connection channel 113, thereby connecting the first member 10 and the second member 20 to each other. The third connecting member 3 is pre-installed in the first connecting hole 114, the third connecting passage 31 is communicated with the first connecting passage 113, the threaded fastener 4 can also be pre-installed in the third connecting hole 32, the third connecting member 3 and the threaded fastener 4 are inserted into the installation passage 101 together with the first connecting member 1, the first connecting hole 114 is communicated with the first installation hole 102, and then a tool is used for driving 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, so that the operation is more convenient and faster, and the assembling time is shortened. Furthermore, the threaded fastener 4 may be installed separately from the third connecting member 3, that is, the third connecting member 3 is inserted into the installation passage 101 together with the first connecting member 1 to make the first connecting hole 114 communicate with the first installation hole 102, then the threaded fastener 4 is inserted into the third connecting hole 32 through the first installation hole 102, and then a tool is used to drive the threaded fastener 4 from the first installation hole 102 to rotate in the third connecting hole 32 to insert one end of the threaded fastener 4 into the connecting groove 23; in addition, it is possible to drive the threaded fastener 4 with a tool to rotate so that the external thread of the threaded fastener 4 forms an internal thread structure to the inner side wall of the first mounting hole 102 (the diameter of the first mounting hole 102 is slightly smaller than the outer circumferential diameter of the threaded fastener 4), and then drive the threaded fastener 4 to rotate within the third connecting hole 32 so that one end of the threaded fastener 4 is inserted into the connecting recess 23, so that the threaded fastener 4 is inserted into the connecting recess 23 by engaging with the third connecting hole 32 while the first mounting hole 102 engages with the thread.

It should be further noted that the order of the above steps S100 'and S200' may be interchanged.

In addition, referring to the reverse operation of S300', the first member 10 and the second member 20 of embodiment 2 of the present invention are mutually separated, that is, the threaded fastener 4 is firstly pulled out from the connecting groove 23 to release the locking of the threaded fastener 4 to the second connecting member 2, so that the end of the second connecting member 2 having the connecting groove 23 can be pulled out from the first connecting channel 113 and separated from the second member 20, thereby mutually separating the first member 10 and the second member 20.

Example 3

Embodiment 3 of the present invention provides a connecting assembly, which is similar to the connecting assembly of embodiment 1 or embodiment 2, except that: as shown in fig. 86-90, the second connection end 21 and the second installation end 22 of the second connection member 2 of the connection assembly of the above embodiment 1 or embodiment 2 are rigid structures formed integrally, while the second connection member 2 of the connection assembly of the embodiment 3 of the present invention has a hinge portion 26 between the second connection end 21 and the second installation end 22, and the second connection end 21 and the second installation end 22 rotate with each other through the hinge portion 26, so that the second connection end 21 and the second installation end 22 form an included angle, which is, for example, 10 °, 30 °, 65 °, 100 °, 150 °, or 180 °. As shown in fig. 91, when the first member 10 and the second member 20 are connected and attached to each other in an opposite manner, an included angle between the second connecting end 21 and the second mounting end 22 is adjusted according to the connection slope of the first member 10 and the second member 20, so that the second mounting end 22 is fixedly connected to the connecting surface of the second member 20, the second connecting end 21 is inserted into the first connecting channel 113 of the first connecting member 1 of the first member 10, and finally the connecting surface of the first member 10 and the connecting surface of the second member 20 are attached to each other to realize invisible connection, and the threaded fastener 4 is driven to move and inserted into the connecting groove 23 to limit the second connecting end 21 from being pulled out of the first connecting channel 113.

It should be noted that please refer to the structure of the second connecting member 2 of embodiment 1 or embodiment 2 above for the other structures of the second connecting member 2 of embodiment 3 of the present invention, and details are omitted here. For example, as shown in fig. 86 to 87 and 89 to 90, when the second link member 2 is provided with the operating portion 24, the operating portion 24 may be closer to the second link end 21 than the hinge portion 26. As shown in fig. 88, for example, when the second link 2 is provided with the rotating body 7, the rotating body 7 is closer to the second mounting end 22 than the hinge portion 26.

Furthermore, as shown in fig. 92, in order to insert the first connecting member 1 into the first member 10 more invisibly and not affect the joint between the joint surface of the first member 10 and the joint surface of the second member 20, the end of the first connecting end 111 of the first connecting member 1 according to embodiment 3 of the present invention is sharp, and the inclination angle of the end of the first connecting end 111 is the same as the inclination angle of the joint surface of the first member 10, so that after the first connecting member 1 is inserted into the installation channel 101 of the first member 10, the end of the first connecting end 111 is flush with the joint surface of the first member 10, thereby achieving the purpose of invisibility.

Further, the hinge 26 of embodiment 3 of the present invention may be a pivot or a hinge ball or a gimbal structure. Specifically, for example, as shown in fig. 86-88, when the hinge portion 26 is a pivot, the second connecting end 21 and the second mounting end 22 are respectively provided with pivot holes, and a pin or a cylinder structure is used as the pivot to sequentially pass through the pivot holes of the second connecting end 21 and the second mounting end 22, so that the second connecting end 21 and the second mounting end 22 can rotate relatively. For example, as shown in fig. 89-90, when the hinge portion 26 is a universal joint, the universal joint is, for example, a cross shaft, the second connecting end 21 and the second mounting end 22 are respectively provided with a rotating shaft hole, the rotating shaft hole of the second connecting end 21 is sleeved on a first rotating shaft of the cross shaft, and the rotating shaft hole of the second mounting end 22 is sleeved on a second rotating shaft of the cross shaft, so that the second connecting end 21 and the second mounting end 22 respectively rotate around two axial directions of the cross shaft, thereby achieving the angle adjustment of the second connecting end 21 and the second mounting end 22 in a three-dimensional space, achieving more flexible angle adjustment and improving the convenience of assembly, and thus the connecting assembly of embodiment 3 of the present invention is suitable for invisible connection in which the connecting surfaces of two furniture panels are inclined surfaces, and improving the aesthetic property of the finished furniture.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the 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, comprising:

2. A connection assembly, comprising:

a second connecting piece, one end of which is formed with a connecting groove;

3. The connecting assembly as set forth in claim 1, wherein one end of the threaded fastener inserted into the connecting groove is pointed, and the threaded fastener is threadedly coupled with the inner sidewall of the first connecting hole by a self-tapping type.

4. The connection module of claim 1, wherein the first bore has an inner sidewall integrally formed with a threaded ridge, and the threaded fastener is threadably coupled to the first bore by mating with the threaded ridge.

5. The connection assembly of claim 4, wherein the thread ridge is metal.

6. The coupling assembly of claim 1 further comprising a first metal block disposed within the first coupling aperture, the first metal block defining a first threaded aperture, the threaded fastener threadably engaging the first threaded aperture to threadably couple the threaded fastener within the first coupling aperture.

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

8. The connecting assembly of claim 6, wherein a protrusion is formed on an inner sidewall of the first connecting hole, and the protrusion is disposed at a position where the first connecting channel communicates with the first connecting hole; the first metal block is positioned between the lug boss and the communication positions of the first connecting hole and the first connecting channel.

9. The connecting assembly of claim 8, wherein the outer sidewall of the first connecting member defines an insertion hole communicating with the first connecting hole, and the first metal block is inserted between the protruding portion and the communication portion of the first connecting hole and the first connecting channel through the insertion hole.

10. The connecting assembly of claim 1, further comprising a second metal block disposed in the first connecting hole opening, the second metal block defining a second threaded hole in communication with the first connecting hole; the threaded fastener is in threaded connection with the second threaded hole in a matched mode, so that the threaded fastener is in threaded connection with the first connecting hole.

11. The connecting assembly of claim 10, wherein the first connecting member is formed with a receiving groove along an open periphery of the first connecting hole for receiving the second metal block.

12. The connecting assembly of claim 2, wherein the outer sidewall of the third connector has at least one positioning plane or positioning bump or positioning groove, or the cross section of the third connector is oval or oval;

13. The connecting assembly according to claim 2, wherein both ends of the third connecting passage respectively penetrate through opposite sides of the third connecting member, one end of the second connecting member penetrates through the third connecting passage and protrudes outside the third connecting member, and at least a portion of the connecting groove is located at a position where the third connecting passage communicates with the third connecting hole.

14. The connection assembly of claim 1 or 2, wherein the first connection member is a metal member or a rigid plastic member.

15. The connection assembly of claim 1 or 2, wherein the first connector includes a first connector body and a mounting post integrally formed with the first connector body, the first connector body including a first connection end and a first mounting end that are opposed, the first connection channel being located at the first connection end, the mounting post being located at the first mounting end;

16. The connector assembly of claim 15, wherein the outer sidewall of the first connector body is contoured in an axisymmetric pattern and has at least two first axes of symmetry, and wherein the minimum distance between a line along the central axis of the mounting post and an intersection of the at least two first axes of symmetry is greater than zero, as viewed from the first connector end toward the first mounting end.

17. The connection assembly of claim 16, wherein the first connector body is cylindrical and the central axis of the mounting post is not collinear with the central axis of the first connector body.

18. The connection assembly of claim 15, wherein the outer sidewall of the first connector includes first and second opposing sides, the first connection aperture opens on the first side, and the threaded fastener is inserted into the first connection aperture from the first side of the first connector;

19. The connecting assembly of claim 18, wherein a minimum distance between the second side of the first connector and the inner sidewall of the first connecting channel is set to L3; wherein L3 satisfies: l3 is more than or equal to 0.3mm and less than or equal to 6 mm.

20. The connector assembly of claim 15 wherein the outer side wall of the first connector body is provided with a locating boss.

21. The connecting assembly according to claim 1 or 2, wherein a correction slope portion is formed at a position where an inner side wall of the connecting groove is connected to a groove bottom of the connecting groove.

22. A connection assembly according to claim 1 or claim 2, wherein the second connector has opposed second connecting ends on which the connection recess is located and second mounting ends for removable connection to a second member.

23. The connection module according to claim 22, wherein a recess is formed in an outer circumferential wall of the second connection end, and the connection groove is opened in the recess.

24. The connection module of claim 22 wherein an outer side wall of said second mounting end is formed with a first mounting external thread portion.

25. The coupling assembly of claim 24, further comprising an expansion nut, wherein the second mounting end is rotatably disposed within the expansion nut for driving the outer peripheral wall of the expansion nut to expand outwardly to couple the second mounting end to the second member via the expansion nut.

26. The connecting assembly of claim 22, wherein the second connecting member is fixedly provided with an operating portion between the second connecting end and the second mounting end, the operating portion having at least one first operating plane or first operating hole or first operating bump or first operating groove, or the cross section of the operating portion being adapted to the cross section of the sleeve.

27. The connection assembly of claim 22, further comprising an expansion body having a tapered channel formed therein;

28. The connection assembly of claim 22, wherein the second connector member has a hinge portion between the second connection end and the second mounting end, the second connection end and the second mounting end being rotatable relative to each other via the hinge portion.

29. A connection system comprising a first member, a second member and a connection assembly as claimed in any one of claims 1 to 28;

30. The connecting system of claim 29 wherein the installation channel comprises a first-stage sub-channel and a second-stage sub-channel that are interconnected, the first-stage sub-channel having an axisymmetric cross-section and at least two second axes of symmetry, the second-stage sub-channel having a center axis that is located at a minimum distance greater than zero from an intersection of the at least two second axes of symmetry.

31. The connecting system of claim 30 wherein the cross-section of the first-stage sub-passageway and the cross-section of the second-stage sub-passageway are each circular, and the central axis of the first-stage sub-passageway is not collinear with the central axis of the second-stage sub-passageway.

32. A method of installation using a connection assembly according to any of claims 1 to 28, comprising the steps of:

inserting the first connecting piece into the mounting channel and communicating the first connecting hole with the first mounting hole, penetrating the end of the second connecting piece with the connecting groove into the first connecting channel and placing at least one part of the connecting groove at the position where the first connecting channel is communicated with the first connecting hole, driving the threaded fastener to rotate from the first mounting hole so that one end of the threaded fastener is inserted into the connecting groove to limit the second connecting piece to slide in the first connecting channel, and thus connecting the first member and the second member with each other.

33. The mounting method according to claim 32, wherein the mounting channel comprises a first-stage sub-channel and a second-stage sub-channel which are communicated with each other, the cross section of the first-stage sub-channel is in an axisymmetric pattern and has at least two second symmetry axes, and the minimum distance between the intersection point of a straight line where the central axis of the second-stage sub-channel is located and the at least two second symmetry axes is greater than zero.

34. The method of claim 33, wherein the cross-section of the first-stage sub-passageway and the cross-section of the second-stage sub-passageway are each circular, and the central axes of the first-stage sub-passageway and the second-stage sub-passageway are not collinear.

35. The method of mounting of claim 32, wherein the threaded fastener is inserted through the first mounting hole and one end of the threaded fastener is inserted into the attachment recess.