Connecting device and sofa assembly

Abstract

The utility model provides a connecting device (30) which comprises a first connecting part (31) and a second connecting part (32) which are detachably connected with a first component (10) and a second component (20) respectively in an inserting mode, the first component (10) and the first connecting part (31) are matched with each other in shape, and the second component (20) and the second connecting part (32) are matched with each other in shape. The first component (10), the connecting device (30) and the second component (20) are tightly assembled in sequence. The utility model further provides a sofa assembly (1) which comprises a first component (10) and a second component (20) which are detachably connected through the connecting device (30). The connecting device is convenient to connect, detachable, convenient to assemble and reliable in strength.

Description

Technical Field

[0001] The utility model relates to a connecting device and a sofa assembly, in particular to a connecting device used for a sofa assembly and a sofa assembly using the connecting device. Background Art

[0002] In the field of furniture, for modular production, it is generally necessary to produce multiple different parts in the furniture device separately, and then assemble the parts together to form a finished product for sale. For example, in the production process of sofa components, the sofa base, backrest, and armrests are usually produced separately on different production lines, and then these parts are assembled together in the assembly stage. Therefore, a suitable assembly / assembly method and device are needed for component assembly in the field of furniture.

[0003] Traditional technologies usually use threaded fasteners, glue, and other methods to connect different parts of furniture. For example, holes are usually punched on the parts to be connected, and then the two parts are connected together by inserting fasteners into the holes; or, the corresponding positions of the parts to be connected are directly glued together to achieve a fixed connection. However, these connection methods have many shortcomings: (1) Workers are required to manually punch holes, apply glue, etc. during the assembly process, which not only consumes manpower and material resources, but also over-relies on manual operation technology, resulting in unstable products and low yield rates, which are not suitable for large-scale and standardized production; (2) These connection methods are not convenient for disassembly and require professional tools for maintenance, reassembly, and other operations; and (3) The connection strength is insufficient, and only a small area (for example, the connection area of ​​the fastener) is locally stressed and pressurized, making the connection area prone to breakage and falling off during transportation and subsequent use, which is prone to quality problems.

[0004] Therefore, it is necessary to provide a connection device for assembling / assembling different components in furniture to at least solve or alleviate the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a connection device between the various components of a furniture assembly in view of the above problems existing in the prior art, so that the connection and disassembly between the various components are convenient, the strength is reliable, and the need for manual application of fasteners and glue in the assembly process of traditional furniture components is reduced, so that the assembly process is simple and the quality is stable.

[0006] On the one hand, the utility model provides a connecting device, characterized in that the connecting device is used to detachably connect a first component and a second component together by plugging, wherein the connecting device includes: a first connecting part, the first connecting part is configured to be detachably connected to the first component by plugging; and a second connecting part connected to the first connecting part, the second connecting part is configured to be detachably connected to the second component by plugging, and wherein the first component and the first connecting part are configured to have mutually matching shapes, and the second component and the second connecting part are configured to have mutually matching shapes, so that the first component, the connecting device, and the second component are tightly assembled in sequence.

[0007] The connection device according to the utility model can at least achieve the following beneficial effects:

[0008] (1) Realize detachable connection for easy assembly and subsequent transportation, maintenance, etc.

[0009] (2) Reduce or even eliminate the use of fasteners, glue, etc., and achieve a firm and reliable connection simply by plugging them together, reducing or even eliminating the need for manual drilling, fastener application, glue application, etc., reducing labor time and dependence on manual operations, and ensuring stable product quality; and

[0010] (3) Compared with the traditional fastener and glue connection method, the connection device of the utility model has high connection strength and is not prone to breakage and detachment.

[0011] In a preferred embodiment of the present invention, the first component includes: a main body; and a plug-in component connected to the main body and extending in a vertical direction, the plug-in component includes a lower portion configured to be connected to the main body and an upper portion configured to be detachably plugged into the first connecting portion, wherein the upper portion of the plug-in component includes a first side and a second side extending in the vertical direction relative to each other, and the first connecting portion includes: a first groove portion and a second groove portion extending in the vertical direction relative to each other, wherein the first groove portion and the second groove portion of the first connecting portion respectively cooperate with the shapes of the first side and the second side of the plug-in component of the first component, so that the first connecting portion is tightly assembled with the plug-in component of the first component.

[0012] In a preferred embodiment of the present invention, the upper portion of the plug-in component has a horizontal width that gradually increases from top to bottom, and correspondingly, the horizontal distance between the first groove portion and the second groove portion of the first connecting portion gradually increases from top to bottom.

[0013] In a preferred embodiment of the present invention, the first side and the second side of the upper portion of the plug-in component include a first stop portion protruding outward, and wherein, during the process of mutual plugging of the first connecting portion and the plug-in component, when the first connecting portion moves to the point where its lower end contacts the first stop portion of the plug-in component, the first stop portion prevents the first connecting portion from continuing to move downward.

[0014] In a preferred embodiment of the present invention, the walls of the first groove portion and the second groove portion of the first connecting portion include a second stop portion protruding inward, and wherein, during the process of mutual plug-in connection between the first connecting portion and the plug-in component, when the first connecting portion moves to the upper end of the plug-in component and contacts the second stop portion of the first connecting portion, the second stop portion prevents the first connecting portion from continuing to move downward.

[0015] In the above embodiment, the width distribution of the plug-in component and the first connecting portion, which is narrow at the top and wide at the bottom, and the arrangement of the first and / or second stop portions can effectively limit the relative movement of the two to within the first relative movement range, so that even under the action of gravity, the first connecting portion will not continue to move downward and disengage from the plug-in component.

[0016] In a preferred embodiment of the present invention, the first groove portion and the second groove portion of the first connecting portion include a protrusion protruding inward, and the first side edge and the second side edge of the upper portion of the plug-in component include a recessed portion that matches the shape of and corresponds to the position of the protrusion of the first groove portion and the second groove portion of the first connecting portion, and the recessed portion is configured to accommodate the protrusion when the first connecting portion is in a connected state with the plug-in component.

[0017] In a preferred embodiment of the present invention, the second component includes: a main body, and a groove extending in a vertical direction formed on a side of the main body facing the first component, the groove having an open lower end; and the second connecting portion extends in a vertical direction and cooperates with the shape of the groove of the second component, so that the second connecting portion is tightly fitted with the groove of the second component.

[0018] In a preferred embodiment of the present invention, the groove of the second component includes: a top wall extending in the horizontal direction; a rear wall extending in the vertical direction; and a first side wall and a second side wall located on both sides of the rear wall and the top wall and connected to the rear wall and the top wall, and the second connecting portion includes: a rear wall of the second connecting portion arranged corresponding to the rear wall of the groove of the second component; and a first side wall and a second side wall of the second connecting portion arranged corresponding to the first side wall and the second side wall of the groove of the second component, respectively, the first side wall and the second side wall of the second connecting portion are connected to the rear wall of the second connecting portion and are respectively located on both sides of the rear wall, and wherein, during the process of mutual insertion of the groove of the second component and the second connecting portion, when the second connecting portion moves to the top side end of the rear wall, the first side wall and / or the second side wall of the second connecting portion contacting the top wall of the second component, the top wall prevents the second connecting portion from continuing to move upward.

[0019] In a preferred embodiment of the present invention, the horizontal distance between the first side wall and the second side wall of the second connecting portion is configured to gradually increase from top to bottom; and wherein the horizontal distance between the first side wall and the second side wall of the second component is configured to gradually increase from top to bottom.

[0020] The above-mentioned arrangement of the top wall of the groove and the distance between the side walls of the groove and the second connecting part, which are smaller at the top and larger at the bottom, can limit the relative movement range between the second connecting part and the groove, so that even under the action of gravity, the second component will not continue to move downward relative to the second connecting part and cause separation from each other.

[0021] In a preferred embodiment of the present invention, the first side wall and the second side wall of the second connection part of the connection device are connected between the rear wall of the second connection part and the first connection part of the connection device, wherein the horizontal distance between the first side wall and the second side wall of the second connection part is configured to gradually decrease in the direction from the rear wall of the second connection part toward the first connection part, and wherein the horizontal distance between the first side wall and the second side wall of the second component is configured to gradually decrease in the direction from the rear wall of the second component toward the first component. This arrangement can prevent the second connection part from loosening in the horizontal direction or even loosening from the groove.

[0022] In a preferred embodiment of the present invention, the first side wall, the second side wall and the rear wall of the second connecting portion are provided with elastic tabs protruding outwards, which make the connection strength between the second connecting portion and the groove higher.

[0023] In a preferred embodiment of the present invention, the elastic tab comprises: a connecting end located at an upper portion of the elastic tab and connected to a corresponding wall; and a free end located at a lower portion of the elastic tab.

[0024] In a preferred embodiment of the present invention, the height of the first connecting portion in the vertical direction is smaller than the height of the rear wall of the second connecting portion in the vertical direction.

[0025] In a preferred embodiment of the present invention, holes are pre-arranged at corresponding positions of the rear wall of the second connecting portion and the rear wall of the groove, respectively, and the holes allow fasteners to be inserted to fix the second connecting portion of the connecting device relative to the second component.

[0026] In a preferred embodiment of the present invention, the fastener is a plastic nail or a metal screw made of plastic.

[0027] In a preferred embodiment of the present invention, the connecting device is configured to be formed by integrally bending a sheet metal piece.

[0028] In a preferred embodiment of the present invention, the first component is a base bracket of a sofa assembly, and the second component is an armrest of the sofa assembly.

[0029] In a preferred embodiment of the present invention, the armrest of the sofa is an integral blow-molded structure, an integral injection-molded structure, an integral extrusion-molded structure, and / or an integral wood-plastic-molded structure.

[0030] In another aspect, the utility model provides a sofa assembly, which includes a first component and a second component that are detachably connected together by plugging according to the aforementioned connecting device, wherein the first component is a base bracket of the sofa assembly, and the second component is an armrest of the sofa assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the preferred embodiments shown in the accompanying drawings. In the accompanying drawings, the same reference numerals refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[0032] Figure 1 A three-dimensional view of a sofa using a connection device according to a preferred embodiment of the utility model is shown, wherein only one armrest of the sofa is shown;

[0033] Figure 2 Shows Figure 1A three-dimensional view of the sofa from another angle, wherein the armrests and connecting devices of the sofa are shown in an exploded manner;

[0034] Figure 3 Shown in a decomposed manner Figure 1 A three-dimensional view of the armrest, connecting device and plug-in component of the sofa shown;

[0035] Figure 4 Shows Figure 3 A front view of the plug-in components of the sofa shown;

[0036] Figure 5 A three-dimensional view of a connecting device according to a preferred embodiment of the present utility model is shown;

[0037] Figure 6 Shows Figure 5 a rear view of the illustrated connection device;

[0038] Figure 7 Shows Figure 5 A top view of the connecting device shown;

[0039] Figure 8 Shows Figure 5 a side view of the illustrated connection device;

[0040] Fig. 9 Shows Figure 1 an inward-facing side view of the armrest of the illustrated sofa;

[0041] Fig.10 Shows Figure 1 a bottom view of the armrests of the illustrated sofa; and

[0042] Fig.11 Shows Figure 1 The three-dimensional view of the armrests, connecting devices and plug-in components of the sofa is shown. For the sake of clarity, the base bracket of the sofa is not shown in the figure, only the plug-in components on the base bracket are shown, and the armrests, connecting devices and plug-in components are in an assembled state. DETAILED DESCRIPTION

[0043] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings. What is described here is only the preferred implementation of the utility model. Those skilled in the art can think of other ways to implement the utility model based on the preferred implementation, and the other ways also fall within the scope of the utility model.

[0044] In the process of assembling furniture, different parts of furniture are usually connected together by threaded fasteners, adhesives, etc. to assemble into an integral assembly. However, these conventional connection devices and connection methods require too much manual operation, which consumes manpower and material resources, overly relies on manual operation technology, and produces unstable products; the connection methods are not convenient for disassembly, and professional tools are required for maintenance and reassembly; and the connection strength is not enough, the stress-bearing area is small, and the connection area is easy to break or fall off during transportation and subsequent use.

[0045] In order to at least solve the problems in the prior art, the utility model provides a connecting device, which is used to detachably connect a first component and a second component by plugging, wherein the connecting device includes: a first connecting portion, which is configured to be detachably connected to the first component by plugging; and a second connecting portion connected to the first connecting portion, which is configured to be detachably connected to the second component by plugging, and wherein the first component and the first connecting portion are configured to have mutually matching shapes, and the second component and the second connecting portion are configured to have mutually matching shapes, so that the first component, the connecting device, and the second component are tightly assembled in sequence. The utility model also provides a sofa assembly, which includes a first component and a second component detachably connected together by plugging through the connecting device according to the utility model as described above, wherein the first component is a base bracket of the sofa assembly, and the second component is an armrest of the sofa assembly.

[0046] The content of the utility model is described in detail below in conjunction with various embodiments shown in the accompanying drawings. The directional terms such as "upper", "lower", "top", "bottom", etc. used below are based on the situation that furniture, such as a sofa assembly, is normally placed on the ground in the assembled state.

[0047] Figure 1 An exemplary embodiment of a sofa assembly using the connection device according to the utility model is shown, wherein, for the sake of clarity and simplicity, only one armrest is shown, and the other armrest is omitted. It can be understood that the above connection device can be used not only for the sofa assembly shown in this embodiment, but also for any scenario that can be thought of by those skilled in the art, for example, furniture such as beds, cabinets, tables, etc. Figure 1The sofa assembly 1 shown includes a base support 10 and an armrest 20, and the armrest 20 is detachably connected to the base support 10 by plugging via the above-mentioned connecting device. That is, in this embodiment, the above-mentioned first component is the base support 10, and the second component is the armrest 20. Of course, in other embodiments, the first component and the second component can be other conceivable components in a sofa or other furniture device, such as a backrest and a base.

[0048] More clearly, refer to Figure 2 and Figure 3 , wherein the armrest of the sofa and related components such as the connecting device are shown in an exploded manner. The base bracket 10 and the armrest 20 of the sofa are detachably connected together by the connecting device 30. The base bracket 10 includes a main body for supporting the sofa assembly, and a plug-in component 11 arranged on both sides of the main body, connected to the main body and extending in the vertical direction. The plug-in component 11 is configured to be connected and disassembled with the connecting device 30 in a plug-in manner. The armrest 20 includes a main body, and a groove extending in the vertical direction is formed on the side of the armrest main body facing the interior of the sofa (that is, the side facing the seat in the assembled state), which allows the connecting device 30 to be detachably connected to the armrest in a plug-in manner.

[0049] Further, refer to Figure 4 and Figure 5 , which respectively show the above-mentioned plug-in component 11 and the connecting device 30 according to the preferred embodiment of the utility model. Preferably, the plug-in component 11 is formed as a sheet component as a whole, which includes a lower part 112 connected to the main body of the base bracket 10 and an upper part 111 detachably plugged with the connecting device 30. The lower part 112 of the plug-in component can, for example, include one or more pre-set holes to be fixedly installed on the main body (for example, the frame part) of the base bracket by fasteners such as pins, so that the installed plug-in component extends upward in the vertical direction close to the side of the main body. It can be understood that the lower part of the plug-in component can also be installed to the main body of the base bracket in other ways that can be easily thought of by those skilled in the art. The upper part 111 of the plug-in component 11 includes a first side edge 1111 and a second side edge 1112 extending in the vertical direction, and the upper part can be inserted into the corresponding position of the connecting device to connect with it.

[0050] Further, Figure 5The connecting device 30 shown includes a first connecting portion 31 and a second connecting portion 32, wherein the first connecting portion 31 is configured to be detachably connected to a first component, i.e., the base bracket 10 of the sofa in this example, by plugging; and wherein the second connecting portion 32 is configured to be detachably connected to a second component, i.e., the armrest 20 of the sofa in this example, by plugging. The first connecting portion 31 of the connecting device 30 includes a first groove portion 311 and a second groove portion 312 that are oppositely arranged and extend in the vertical direction, and the two groove portions are respectively arranged correspondingly to the first side edge 1111 and the second side edge 1112 of the plug-in component 11 (i.e., the two groove portions 311, 312 form a guide rail structure, allowing the upper portion 111 of the sheet-like plug-in component 11 to be inserted and slide to a suitable position inside it), so as to allow the upper portion of the plug-in component to be plugged in with the first connecting portion, for example, allowing the first connecting portion 31 to move downward from the upper side of the plug-in component in the vertical direction to be plugged in with the plug-in component in place.

[0051] Preferably, the upper portion 111 of the plug-in component 11 and the first connecting portion 31 have shapes that match each other. For example, the first groove portion 311 and the second groove portion 312 of the first connecting portion 31 respectively match the shapes of the first side edge 1111 and the second side edge 1112 of the plug-in component 11 of the first component 10, so as to allow the first connecting portion 31 to move downward in the vertical direction from the top of the plug-in component 11 during assembly so as to be plugged into each other with the plug-in component 11 within the first relative movement range, thereby achieving a tight assembly between the first connecting portion 31 and the plug-in component 11.

[0052] In a preferred embodiment, the upper portion 111 of the plug-in component 11 has a gradually increasing horizontal width from top to bottom (i.e., the width of the upper portion 111 of the plug-in component 11 near the upper end is smaller than the width near the lower portion 112), and correspondingly, the horizontal distance between the first groove portion 311 and the second groove portion 312 of the first connecting portion 31 gradually increases from top to bottom (i.e., the width of the first connecting portion 31 near the upper end is smaller than the width near the lower end). This narrow-at-top-and-wide-at-bottom configuration of the plug-in component 11 and the first connecting portion 31 ensures that during the plug-in process, after the first connecting portion 31 moves downward to a certain position relative to the plug-in component 11, it cannot continue to move downward due to being hindered by the larger width of the plug-in component 11 below the position, thereby ensuring that the relative movement between the plug-in component 11 and the first connecting portion 31 does not exceed the first relative movement range.

[0053] In a preferred embodiment, the first side 1111 and the second side 1112 of the upper portion 111 of the plug-in component 11 include a first stop portion 1113 protruding outward (i.e., protruding away from each other). During the mutual plugging of the first connecting portion 31 and the plug-in component 11, when the first connecting portion 31 moves until its lower end 313 contacts the first stop portion 1113 of the plug-in component 11, the first stop portion prevents the first connecting portion 31 from continuing to move downward (i.e., when the lower end 313 of the first connecting portion 31 overlaps the stepped first stop portion 1113 of the plug-in component 11, the first stop portion 1113 prevents the connecting device 30 from continuing to move downward, thereby limiting the relative movement range). Alternatively, the walls of the first groove portion 311 and the second groove portion 312 of the first connecting portion 31 include a second stop portion protruding inward (i.e., protruding toward each other), and wherein, during the process of mutual plug-in connection between the first connecting portion 31 and the plug-in component 11, when the first connecting portion 31 moves to the upper end of the plug-in component 11 and contacts the second stop portion of the first connecting portion 31, the second stop portion prevents the first connecting portion from continuing to move downward.

[0054] It can be understood that the above-mentioned narrow-at-top and wide-at-bottom structure and the stopper structure can be set selectively or can be set simultaneously. Those skilled in the art can select according to actual needs to achieve the desired effect of limiting the relative motion range.

[0055] Furthermore, in order to further improve the connection reliability, the first groove 311 and the second groove 312 of the first connection part 31 include a protrusion 314 protruding inward, and the first side 1111 and the second side 1112 of the upper part 111 of the plug-in component 11 include a recess 1114 that matches the shape of and corresponds to the protrusion 314 of the first groove 311 and the second groove 312 of the first connection part 31, and the recess is configured to accommodate the protrusion 314 when the first connection part 31 is connected to the plug-in component 11. The arrangement of the protrusion 314 and the corresponding recess 1114 can prevent relative movement in the vertical direction when the connection device is connected to the plug-in component, so as to improve the connection strength and reduce the possibility of the plug-in component slipping in the first connection part or even falling off therefrom.

[0056] Preferably, in order to improve the strength of the plug-in component 11 itself, reinforcing ribs 1115 are further provided on its surface.

[0057] Further, refer to Figures 6 to 8 The rear view, top view and side view of the connecting device 30 are shown respectively, and Fig. 9 and Fig.10The figure shows a side view and a top view of the armrest 20 of the sofa facing the inner side (i.e., the side facing the seat in the assembled state). As described above, the armrest 20 includes a main body, and a groove 21 extending in a vertical direction is formed on the side of the armrest main body facing the inside of the sofa, and the groove allows the connecting device 30 to be detachably connected to the armrest 20 in a plug-in manner. The groove 21 has an open lower end to allow the second connecting portion 32 of the connecting device 30 to be inserted into the groove from the bottom of the groove in the vertical direction. Preferably, as shown in the figure, the groove 21 is provided at the lower part of the main body of the armrest 20.

[0058] Further, the groove 21 of the armrest 20 includes: a top wall 214 extending in the horizontal direction, a rear wall 213 extending in the vertical direction, and a first side wall 211 and a second side wall 212 located on both sides of the rear wall 213 and the top wall 214 and connected to the rear wall and the top wall. Corresponding to the groove 20, the second connecting portion 32 includes: a rear wall 323 of the second connecting portion 32 arranged corresponding to the rear wall 213 of the groove 21 of the second component 20; and a first side wall 321 and a second side wall 322 of the second connecting portion 32 arranged corresponding to the first side wall 211 and the second side wall 212 of the groove 21 of the second component 20, the first side wall 321 and the second side wall 322 of the second connecting portion 32 are connected to the rear wall 323 of the second connecting portion and are located on both sides of the rear wall 323. Reference Figure 5 , the first side wall 321 and the second side wall 322 of the second connection part 32 are connected between the rear wall 323 of the second connection part 32 and the first connection part 31 of the connection device 30, that is, the two grooves of the first connection part are respectively connected to the two side walls of the second connection part (the two grooves extend from the two side walls in the direction away from the second connection part). In the process of mutual insertion of the groove 21 of the second component 20 and the second connection part 32, when the second connection part 32 moves to the point where the top end of its rear wall 323, the first side wall 321 and / or the second side wall 322 contacts the top wall 214 of the second component 20, the top wall 214 prevents the second connection part 32 from continuing to move upward, thereby limiting the relative movement of the groove 21 of the second component and the second connection part 32 to not exceed the second relative movement range, so that the groove 21 of the second component and the second connection part 32 can be tightly fitted.

[0059] In addition, the second connecting portion 32 and the groove 21 of the second component 20 can also limit the relative movement between the two to within the second movement range by other means. Figure 6 , the horizontal distance between the first side wall 321 and the second side wall 322 of the second connection portion 32 is configured to gradually increase from top to bottom (ie, the width of the upper portion of the second connection portion 32 is smaller than the width of the lower portion), and accordingly, with reference to Fig. 9, the horizontal distance between the first side wall 211 and the second side wall 212 of the second component 20 is configured to gradually increase from top to bottom (i.e., the width of the upper part of the groove 21 is smaller than the width of the lower part). This narrow-upper-wide-lower configuration of the groove 21 and the second connecting portion 32 enables the second connecting portion 32 to move upward relative to the groove 21 to a certain position from the open lower end of the groove 21 during the plug-in process, and then cannot continue to move upward due to being blocked by the smaller width of the groove above this position, thereby ensuring that the relative movement between the groove 21 and the second connecting portion 32 does not exceed the second relative movement range. It can be understood that the top wall 214 of the groove 21 for limiting relative movement as described above, and the narrow-upper-wide-lower configuration of the groove 21 and the second connecting portion 32 can be selectively set or set simultaneously according to actual needs to meet the need to limit the relative movement range.

[0060] More preferably, reference Figure 7 , the horizontal distance between the first side wall 321 and the second side wall 322 of the second connection portion 32 is configured to gradually decrease in the direction from the rear wall 323 of the second connection portion 32 toward the first connection portion 31 (that is, the second connection portion has a reduced width in the direction toward the first connection portion), and accordingly, with reference to Fig.10 The horizontal distance between the first side wall 211 and the second side wall 212 of the second component 20 is configured to gradually decrease in the direction from the rear wall 213 of the second component 20 toward the first component 10 (that is, the width of the groove gradually decreases in the direction from the inside of the groove 21 to the outside). This width setting can increase the contact area between the second connection part 32 and the groove, and by making the first side wall and the second side wall of the second connection part and the groove extend toward each other, the relative movement of the second connection part 32 and the groove 21 in the horizontal direction is limited, and the second connection part 32 is effectively prevented from being separated from the groove 21 in the horizontal direction, which plays a limiting role.

[0061] Further preferably, in order to improve the connection strength and reliability, as Figure 7As shown, the first side wall 321, the second side wall 322 and the rear wall 323 of the second connection part 32 are provided with elastic tabs 324 protruding outward. These elastic tabs 324 elastically abut the corresponding walls of the groove when the second connection part 32 is connected to the groove 21, thereby generating a force directed to the center of the second connection part 32, so that it is more firmly held in the groove 21. More preferably, in order to facilitate plugging, the elastic tab 324 includes: a connecting end connected to the corresponding wall at the upper part of the elastic tab; and a free end at the lower part of the elastic tab. In this way, when the second connection part 32 is inserted into the groove from the lower end of the groove upward, the elastic tab 324 will not hinder the plugging process. It can be understood that the above-mentioned elastic tabs can also be provided on the corresponding walls of the groove, and those skilled in the art can select according to needs.

[0062] More preferably, if Figure 8 As shown, the vertical height of the first connection part 31 is smaller than the vertical height of the rear wall 323 of the second connection part 32, that is, the vertical height of the side walls 321, 322 extending between the rear wall 323 of the second connection part 32 and the grooves 311, 312 of the first connection part 31 gradually decreases toward the first connection part. This configuration reduces material requirements and makes the structure more compact while ensuring the connection strength. In addition, it is easier for users to directly locate the first connection part and the second connection part by touch during the assembly process, which facilitates plug-in.

[0063] In order to further improve the connection strength, holes 3231, 2131 are pre-arranged at the corresponding positions of the rear wall 323 of the second connection portion 32 and the rear wall 213 of the groove 21 of the second component 20, respectively. The holes allow, for example, Figure 3 The fastener 33 shown is inserted to fix the second connection part 32 of the connection device 30 relative to the groove 21 of the second component 20. This preset hole allows the user to use a fastener to reinforce the connection part when it becomes loose due to wear during use, or it can also be directly reinforced during the assembly process, so that the connection reliability is higher. For example, the fastener can be a plastic nail made of plastic or an ordinary metal screw. And preferably, the hole 2131 of the rear wall 213 of the groove 21 can be a pre-set through hole, or it can be a recessed portion with a thinner wall thickness relative to the wall thickness of the surrounding portion of the hole 2131, and the recessed portion allows the fastener to easily pass through it during the assembly process to achieve fastening.

[0064] Preferably, the connecting device 30 as described above can be formed by bending a sheet metal piece in one piece, thereby producing the first connecting portion 31 and the second connecting portion 32. This design facilitates production, reduces welding steps, and makes the connecting device itself strong and not easy to break.

[0065] refer to Fig.11In this figure, the first connecting portion 31 and the second connecting portion 32 of the connecting device 30 are respectively assembled with the plug-in component 11 of the sofa base bracket and the groove 21 of the sofa armrest. Thus, a convenient and reliable detachable plug-in connection between the sofa armrest 20 and the sofa base bracket 10 is achieved.

[0066] Preferably, the sofa armrest 20 is an integral blow-molded, integral injection-molded, integral extruded, and / or integral wood-plastic-molded structure, and the sofa base bracket 10 and the plug-in component 11 connected thereto are metal products.

[0067] It is understood that the first component and the second component described herein are not limited to the sofa base bracket and the armrest described in the exemplary embodiment, and can be various components on various devices that can be thought of by those skilled in the art, such as but not limited to, a backrest component, a pillow component, a seat frame component, or an armrest component of a sofa or bed, etc. Those skilled in the art can apply the connection device described in the present utility model between any suitable components as needed.

[0068] The above description of various embodiments of the present invention is provided to a person of ordinary skill in the relevant art for the purpose of description. It is not intended to exclude or limit the present invention to a single disclosed embodiment. As above, a person of ordinary skill in the art will understand the various substitutions and variations of the present invention. Therefore, although some alternative embodiments are specifically described, a person of ordinary skill in the art will understand or relatively easily develop other embodiments. The present invention is intended to include all substitutions, modifications and variations of the present invention described herein, as well as other embodiments that fall within the spirit and scope of the present invention described above.

Claims

1. A connecting device (30), characterized in that: The connecting device (30) is used to detachably connect the first component (10) and the second component (20) together by plugging, wherein the connecting device (30) comprises: A first connection portion (31), the first connection portion (31) being configured to be detachably connected to the first component (10) by plugging; and a second connection portion (32) connected to the first connection portion (31), wherein the second connection portion (32) is configured to be detachably connected to the second component (20) by plugging, and The first component (10) and the first connecting portion (31) are configured to have shapes that fit together, and the second component (20) and the second connecting portion (32) are configured to have shapes that fit together, so that the first component (10), the connecting device (30), and the second component (20) are tightly assembled in sequence.

2. The connecting device (30) according to claim 1, characterized in that The first component (10) comprises: a main body; and a plug-in component (11) connected to the main body and extending in a vertical direction, the plug-in component (11) comprising a lower portion (112) configured to be connected to the main body and an upper portion (111) configured to be detachably plugged into the first connecting portion (31), wherein the upper portion (111) of the plug-in component (11) comprises a first side edge (1111) and a second side edge (1112) extending in a vertical direction and opposite to each other, and The first connecting portion (31) comprises: a first groove portion (311) and a second groove portion (312) which are arranged opposite to each other and extend in a vertical direction, wherein the first groove portion (311) and the second groove portion (312) of the first connecting portion (31) respectively match the shapes of the first side edge (1111) and the second side edge (1112) of the plug-in component (11) of the first component (10), so that the first connecting portion (31) and the plug-in component (11) of the first component (10) are tightly assembled.

3. The connection device (30) according to claim 2, characterized in that The upper portion (111) of the plug-in component (11) has a horizontal width that gradually increases from top to bottom, and correspondingly, the horizontal distance between the first groove portion (311) and the second groove portion (312) of the first connecting portion (31) gradually increases from top to bottom.

4. The connection device (30) according to claim 2 or claim 3, characterized in that: The first side edge (1111) and the second side edge (1112) of the upper portion (111) of the plug component (11) include a first stopper (1113) protruding outward, and In the process of mutual plugging of the first connecting portion (31) and the plug-in component (11), when the first connecting portion (31) moves to the point where its lower end (313) contacts the first stop portion (1113) of the plug-in component (11), the first stop portion prevents the first connecting portion (31) from continuing to move downward.

5. The connection device (30) according to claim 2 or claim 3, characterized in that: The walls of the first groove portion (311) and the second groove portion (312) of the first connecting portion (31) include a second stopper portion protruding inward, and Wherein, during the process of mutual plugging of the first connecting portion (31) and the plug-in component (11), when the first connecting portion (31) moves to the point where the upper end of the plug-in component (11) contacts the second stop portion of the first connecting portion (31), the second stop portion prevents the first connecting portion from continuing to move downward.

6. The connection device (30) according to claim 2 or claim 3, characterized in that: The first groove portion (311) and the second groove portion (312) of the first connecting portion (31) include a protrusion (314) protruding inwardly, and the first side edge (1111) and the second side edge (1112) of the upper portion (111) of the plug-in component (11) include a recess (1114) that matches the shape of and corresponds to the protrusion (314) of the first groove portion (311) and the second groove portion (312) of the first connecting portion (31), and the recess is configured to accommodate the protrusion (314) when the first connecting portion (31) is in a connected state with the plug-in component (11).

7. The connection device (30) according to claim 1, characterized in that The second component (20) comprises: a main body, and a groove (21) extending in a vertical direction formed on a side of the main body facing the first component (10), wherein the groove (21) has an open lower end; and The second connecting portion (32) extends in a vertical direction and matches the shape of the groove (21) of the second component (20), so that the second connecting portion (32) and the groove (21) of the second component (20) are tightly assembled.

8. The connection device (30) according to claim 7, characterized in that The groove (21) of the second component (20) comprises: a top wall (214) extending in a horizontal direction; a rear wall extending in a vertical direction; and A first side wall and a second side wall located on both sides of the rear wall and the top wall (214) and connected to the rear wall and the top wall; and The second connecting portion (32) comprises: a rear wall of the second connecting portion (32) arranged corresponding to the rear wall of the groove (21) of the second component (20); and The first side wall and the second side wall of the second connecting portion (32) are respectively arranged corresponding to the first side wall and the second side wall of the groove (21) of the second component (20), the first side wall and the second side wall of the second connecting portion (32) are connected to the rear wall of the second connecting portion and are respectively located on both sides of the rear wall, and In the process of mutual insertion of the groove (21) of the second component (20) and the second connecting portion (32), when the second connecting portion (32) moves to the point where the rear wall, the first side wall and / or the top end of the second side wall of the second connecting portion (32) contact the top wall (214) of the second component (20), the top wall prevents the second connecting portion (32) from continuing to move upward.

9. The connection device (30) according to claim 8, characterized in that The horizontal distance between the first side wall and the second side wall of the second connecting portion (32) is configured to gradually increase from top to bottom; and wherein the horizontal distance between the first side wall and the second side wall of the second component (20) is configured to gradually increase from top to bottom.

10. The connection device (30) according to claim 8, characterized in that The first side wall and the second side wall of the second connecting portion (32) of the connecting device (30) are connected between the rear wall of the second connecting portion (32) and the first connecting portion (31) of the connecting device (30), wherein the horizontal distance between the first side wall and the second side wall of the second connecting portion (32) is configured to gradually decrease in a direction from the rear wall of the second connecting portion (32) toward the first connecting portion (31), and The horizontal distance between the first side wall and the second side wall of the second component (20) is configured to gradually decrease in the direction from the rear wall of the second component (20) toward the first component (10).

11. The connection device (30) according to claim 10, characterized in that The first side wall, the second side wall and the rear wall of the second connecting portion (32) are provided with elastic protrusions (324) protruding outwards.

12. The connection device (30) according to claim 11, characterized in that The elastic tab (324) includes: a connection end located at the upper portion of the elastic tab (324) and connected to the corresponding wall; and a free end located at the lower portion of the elastic tab (324).

13. The connection device (30) according to claim 8, characterized in that The height of the first connecting portion (31) in the vertical direction is smaller than the height of the rear wall of the second connecting portion (32) in the vertical direction.

14. The connection device (30) according to claim 8, characterized in that Holes are pre-arranged at corresponding positions of the rear wall of the second connecting portion (32) and the rear wall of the groove (21), respectively, and the holes allow fasteners (33) to be inserted to fix the second connecting portion (32) of the connecting device (30) relative to the second component (20).

15. The connection device (30) according to claim 14, characterized in that The fastener (33) is a plastic nail or a metal screw made of plastic.

16. The connection device (30) according to claim 1, characterized in that The connecting device (30) is constructed by integrally bending a sheet metal member.

17. The connection device (30) according to claim 1, characterized in that The first component (10) is a base bracket of the sofa assembly, and the second component (20) is an armrest of the sofa assembly.

18. The connection device (30) according to claim 17, characterized in that The armrest of the sofa is an integrated blow-molded structure, an integrated injection-molded structure, an integrated extrusion-molded structure, and / or an integrated wood-plastic-molded structure.

19. A sofa assembly (1), characterized in that: The sofa assembly comprises a first component (10) and a second component (20) which are detachably connected together by plugging through a connecting device according to any one of claims 1 to 18, wherein the first component is a base bracket of the sofa assembly, and the second component is an armrest of the sofa assembly.

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