Sofa with metal framework structure

Abstract

The invention belongs to the technical field of furniture, and particularly relates to a sofa with a metal framework structure. The sofa structurally comprises a supporting ring, a backup plate supporting frame body unit, a seat plate supporting frame body unit, a composite seat plate unit and a composite backup plate unit, wherein the supporting ring, the backup plate supporting frame body unit and the seat plate supporting frame body unit are integrally welded to form the metal framework, the composite seat plate unit is arranged on the seat plate supporting frame body unit in a clamped mode, and the composite backup plate unit is arranged on the backup plate supporting frame body unit and the composite seat plate unit. The sofa has the beneficial effects that at least the metal framework of the sofa is integrally welded, a large number of disassembly and assembly steps are omitted, the use effect of the sofa is simpler, more convenient and quicker, and the practicability is greatly improved.

Description

Technical Field

[0001] This application belongs to the technical field of furniture, and particularly relates to a sofa with a metal skeleton structure. Background Art

[0002] A sofa with a metal skeleton structure refers to a sofa whose structural composition mainly includes a metal skeleton and a soft-wrapped board body. Among them, the soft-wrapped board body at least includes a seat board and a backrest board, and it can generally be stably used only by being placed on the above-mentioned metal skeleton.

[0003] On the other hand, compared with the common existing wooden frames, the advantages of the above-mentioned metal skeleton are mainly small weight and high strength, while the disadvantages are mainly that it is difficult to stably install the soft outer wrapping material on it, and special attention needs to be paid during use to prevent bumping accidents.

[0004] For example, the Chinese utility model patent with the authorization announcement number CN220734916U and the authorization announcement date of April 9, 2024, discloses a metal skeleton sofa chair, whose structural composition mainly includes: a first armrest board, a backrest board, a second armrest board, a first connecting plate, a first support rod, a second support rod, a second connecting plate, a first ventilation net board, a first positioning block, a second positioning block, and a second ventilation net board.

[0005] The advantages of the metal skeleton sofa chair in this utility model patent are mainly: splitting the sofa chair into three parts, namely the first armrest board, the backrest board, and the second armrest board, makes it convenient for production and also convenient for workers to assemble them into a complete sofa chair later, thereby improving the processing convenience and reducing the production cost.

[0006] However, during the actual use of this metal skeleton sofa chair, there are at least the following impractical problems, which are specifically manifested as: The number of positions that need to be screwed is too many, so the complexity of disassembly and assembly operations is greatly increased, and the practicality is relatively poor. Summary of the Invention

[0007] This application provides a sofa with a metal skeleton structure, and the technical problem it aims to solve is: how to make the sofa with a metal skeleton structure have sufficient and appropriate disassembly and assembly convenience.

[0008] The technical solution adopted by this application to solve the above problems is: a sofa with a metal skeleton structure, whose structure includes a support ring, a backrest support frame unit, and a seat board support frame unit that are integrally welded to form the metal skeleton, a composite seat board unit that is snap-fitted on the seat board support frame unit, and a composite backrest unit that is arranged on the backrest support frame unit and the composite seat board unit.

[0009] A further preferred technical solution is that: the backrest support frame unit includes an inclined connecting rod with its lower end arranged on the support ring and the vertical projection of its upper end located outside the support ring, and an armrest ring arranged at the upper end positions of all the inclined connecting rods and used for supporting the composite backrest unit.

[0010] A further preferred technical solution is that: the vertical projection shape of the armrest ring is circular or elliptical, and the armrest ring is provided with an upwardly tilted side for supporting the composite backrest unit.

[0011] A further preferred technical solution is that: the seat board support frame unit includes an inclined support rod with its lower end arranged on the support ring and the vertical projection of its upper end located inside the support ring, and a clamping ring arranged at the upper end positions of all the inclined support rods and used for supporting the composite seat board unit.

[0012] A further preferred technical solution is that: when the sofa is vertically stacked and stored, the support ring of the upper sofa presses on the inclined support rod of the lower sofa.

[0013] A further preferred technical solution is that: the composite seat board unit includes a rigid bottom board, a seat cushion arranged on the upper surface of the rigid bottom board, and a positioning groove arranged on the lower surface of the rigid bottom board and used for inserting into the clamping ring.

[0014] A further preferred technical solution is that: the composite backrest unit includes a rigid back board arranged on the inclined connecting rod and the armrest ring, and a backrest cushion arranged on the rigid back board and located on the upper surface of the composite seat board unit.

[0015] A further preferred technical solution is that: the seat board support frame unit further includes an outwardly expanding inclined rod with its lower end arranged on the support ring, the vertical projection of its upper end located outside the support ring, and connected to the lower end of the inclined support rod at the upper end to provide a lifting function for the clamping ring.

[0016] A further preferred technical solution is that: the composite seat board unit further includes a dual-purpose elastic sheet arranged on the rigid bottom board, which is used to press on the inclined connecting rod when the sofa is in use and is used to be inserted between the inclined connecting rod and the outwardly expanding inclined rod when the sofa is stacked and stored.

[0017] A further preferred technical solution is that: the composite backrest unit further includes a positioning elastic sheet arranged on the rigid back board, which is used to be inserted between the inclined connecting rod and the outwardly expanding inclined rod when the sofa is in use and stacked and stored.

[0018] The beneficial effects of this application include at least the following 3 points.

[0019] First, the metal framework of the sofa is integrally welded, eliminating a large number of disassembly and assembly steps, making its use effect simpler, more convenient and faster, and greatly improving its practicability.

[0020] Second, the metal framework structure has multiple advantages, including its own large structural strength, as well as clamping and fixing the composite seat board unit and the composite back board unit.

[0021] Third, when the sofa is stored, it can be stably stacked vertically, so that even with an integral metal framework structure, it has a relatively small storage volume, further enhancing its practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the present application.

[0023] Figure 2 It is a schematic structural diagram of the position of the back board support frame unit in the present application from a top view angle.

[0024] Figure 3 It is a schematic diagram of the vertical stacking storage method of the present application.

[0025] Figure 4 It is a schematic structural diagram of the composite seat board unit in the present application.

[0026] Figure 5 It is a schematic diagram of one shape of the dual-purpose elastic sheet in the present application.

[0027] Figure 6 It is a schematic structural diagram of the composite back board unit in the present application.

[0028] Figure 7 It is a schematic diagram of the usage mode of the dual-purpose elastic sheet for pressing on the inclined connecting rod in the present application.

[0029] Figure 8 It is a schematic diagram of the usage mode of the lifting of the clamping ring in the present application. Among them, the solid line position is the initial position of the clamping ring, the inclined support rod and the outwardly expanding inclined rod.

[0030] Figure 9 It is a schematic diagram of the position and shape of the reinforcing rod in the present application.

[0031] Figure 10 It is another schematic structural diagram of the back board support frame unit in the present application from a top view angle.

[0032] In the figure, the meanings of the various marks are as follows.

[0033] Sector cutting area a, bow-shaped cutting area b, personal belongings c of the sofa user, downward pressing position d during use; Support ring 1, backrest support frame unit 2, seat support frame unit 3, composite seat unit 4, composite backrest unit 5; Inclined connecting rod 201, armrest ring 202; Inclined support rod 301, engaging ring 302, outward-expanded inclined rod 303, reinforcing rod 304; Hard bottom plate 401, seat cushion 402, positioning groove 403, dual-purpose elastic sheet 404; Hard back plate 501, backrest cushion 502, positioning elastic sheet 503. Specific implementation mode

[0034] The following is only a preferred embodiment of the present application, and does not limit the scope of the present application.

[0035] As Figures 1 - 10 shown, a sofa with a metal skeleton structure includes a support ring 1, a backrest support frame unit 2, and a seat support frame unit 3 that are integrally welded to form the metal skeleton, a composite seat unit 4 that is snap-fitted on the seat support frame unit 3, and a composite backrest unit 5 that is provided on the backrest support frame unit 2 and the composite seat unit 4.

[0036] In this embodiment, the material of the metal skeleton is stainless steel or aluminum alloy, and the monomer structures forming the support ring 1, the backrest support frame unit 2, and the seat support frame unit 3 can be in the form of tubes or plates. Therefore, although there is a certain problem of high storage and transportation costs for this sofa, it does not require any screwing operations during use, which is extremely convenient and fast, so the overall practicality is relatively high.

[0037] Correspondingly, the main installation steps of this sofa only include: placing the composite seat unit 4 on the seat support frame unit 3, placing the composite backrest unit 5 on the backrest support frame unit 2, and then sitting directly for use.

[0038] Finally, in order to further improve the use safety of this sofa, rubber strips can be wound around or rubber tubes can be sleeved on the monomer structures forming the backrest support frame unit 2 and the seat support frame unit 3, so as to further reduce the degree of damage caused by accidental bumps.

[0039] The backrest support frame unit 2 includes an inclined connecting rod 201 with the lower end provided on the support ring 1 and the vertical projection of the upper end located outside the support ring 1, and an armrest ring 202 provided at the upper end positions of all the inclined connecting rods 201 and used to support the composite backrest unit 5.

[0040] In this embodiment, the shape of the support ring 1 is circular, square or regular hexagonal. The upper end of the inclined connecting rod 201 is inclined outward, thereby providing the sofa with an overall shape of "large at the top and small at the bottom", so that the sofa has a relatively large and comfortable seating space inside.

[0041] The number of the inclined connecting rods 201 is 10-100, and the inclination angles and lengths of the inclined connecting rods 201 may be different, so long as the handrail ring 202 and the support ring 1 are firmly connected one above and one below.

[0042] In addition, the inclined connecting rod 201 itself can also have a curved arc, or be set to various non-standard shapes as needed, so as to ensure the above-mentioned connection effect and the overall shape of "large at the top and small at the bottom".

[0043] The vertical projection shape of the handrail ring 202 is circular or elliptical, and the handrail ring 202 is provided with an upwardly tilted side for supporting the composite backrest unit 5 .

[0044] In this embodiment, the vertical projection shape of the armrest ring 202 can also be a minor arc, and the straight line segment of the minor arc corresponds to the inner side of the user's knee, which is also the lowest point of the entire armrest ring 202. The area near the highest point of the armrest ring 202 that is tilted upward is used to place the composite backrest unit 5, thereby ultimately supporting the user's back.

[0045] In addition, the upwardly curved shapes of the areas on both sides of the line connecting the highest point and the lowest point on the armrest ring 202 are consistent, ensuring that the user has a consistent and relatively comfortable posture when placing his arms thereon.

[0046] Specifically, the armrest ring 202 can also provide two horizontal sections, one on the left and one on the right, for the user's arms to rest, so as to ensure that the armrest ring 202 is one high and one low as a whole, with one side tilted.

[0047] The seat support frame unit 3 includes an inclined support rod 301 whose lower end is arranged on the support ring 1 and whose upper end vertical projection is located on the inner side of the support ring 1, and a snap ring 302 arranged at the upper end position of all the inclined support rods 301 and used to support the composite seat unit 4.

[0048] In this embodiment, the shape of the locking ring 302 can be circular, square or regular hexagonal, and its size is smaller than the support ring 1, so that the upper end of the inclined support rod 301 is retracted inward, that is, the inclination direction of the inclined support rod 301 is opposite to that of the inclined connecting rod 201, the former is retracted inward and the latter is expanded outward.

[0049] Accordingly, the seat support frame unit 3 has at least the following two functions: First, vertically support the composite seat board unit 4 so that the sofa has a large safe load-bearing capacity; Second, horizontally engage the composite seat board unit 4 to prevent the user's buttocks from taking the composite seat board unit 4 away, sliding out, or falling off.

[0050] When the sofas are vertically stacked and stored, the support ring 1 of the upper sofa presses on the inclined support rod 301 of the lower sofa.

[0051] In this embodiment, the third function of the seat board support frame unit 3 is as follows: when the sofas are vertically stacked and stored, the lower engaging ring 302 can be inserted into the upper support ring 1, and the upper support ring 1 can press on the lower inclined support rod 301, so that the "sofa stack" formed by stacking multiple sofas has sufficient stability and a relatively compact overall volume.

[0052] It should be noted that when the sofas are vertically stacked and stored, at least the composite backrest unit 5 does not need to be removed from the backrest support frame unit 2. It is located between two adjacent upper and lower backrest support frame units 2. After adjusting its own thickness to a suitable size, the upper backrest support frame unit 2 can completely not squeeze the lower composite backrest unit 5, which is very practical and convenient. For details, please refer to the appendix Figure 3 。

[0053] The composite seat board unit 4 includes a rigid bottom board 401, a seat cushion 402 provided on the upper surface of the rigid bottom board 401, and a positioning groove 403 provided on the lower surface of the rigid bottom board 401 and used for inserting the engaging ring 302.

[0054] In this embodiment, the shape of the rigid bottom board 401 is determined by the specific inclination postures of all the inclined connecting rods 201, ensuring that the gaps between the rigid bottom board 401 and all the inclined connecting rods 201 are relatively small and no obvious extrusion deformation will occur. For example, the shapes of the rigid bottom board 401 and the seat cushion 402 can both be circular.

[0055] Among them, the shape and size of the positioning groove 403 are determined by the inclined support rod 301 and the engaging ring 302, ensuring that the annular surface of the positioning groove 403 can simultaneously hold the inclined support rod 301 and the engaging ring 302, so as to prevent unnecessary lateral displacement of the composite seat board unit 4.

[0056] The composite backrest unit 5 includes a rigid back board 501 provided on the inclined connecting rod 201 and the armrest ring 202, and a backrest cushion 502 provided on the rigid back board 501 and located on the upper surface of the composite seat board unit 4.

[0057] In this embodiment, the hard bottom plate 401 and the hard back plate 501 are made of the same material, which is a common medium-elastic rubber in the prior art and has the characteristic of moderate hardness.

[0058] The above-mentioned "moderate hardness" is reflected on the hard back plate 501, that is: it will not be broken by the reaction force of the inclined connecting rod 201 and the armrest ring 202, but can be bent by the user's back, and then fit the lateral bending arc of the inclined connecting rod 201 and the armrest ring 202.

[0059] And the above-mentioned "moderate hardness" is reflected on the hard bottom plate 401, that is: it can fully support the user and will not bend significantly by itself, and can also bend slightly by itself temporarily when the sofa is vertically stacked and stored, and then be inserted between two adjacent upper and lower backrest support frame units 2, further optimizing the vertical stacking and storage effect of the sofa. At this time, the storage method of the composite seat plate unit 4 is similar to that of the composite backrest unit 5, and specific reference can be made to the appendix Figure 3 。

[0060] In addition, the materials of the backrest cushion 502 and the seat cushion 402 are also the same, both are foamed sponges.

[0061] Finally, the overall shape of the composite backrest unit 5 is rectangular, and specific reference can be made to the appendix Figure 6 。

[0062] The seat plate support frame unit 3 further includes an outwardly expanding inclined rod 303 with its lower end disposed on the support ring 1, and the vertical projection of its upper end is located outside the support ring 1, and is connected to the lower end of the inclined support rod 301 at the upper end to provide a lifting function for the engaging ring 302.

[0063] In this embodiment, the outwardly expanding inclined rod 303 has at least the following two functions: First, the included angle formed by it and the inclined support rod 301 can be slightly changed, so that the original "rigid connection" method of the engaging ring 302 on the support ring 1 is upgraded to an "elastic connection", and finally the sofa has an elastic support effect, greatly improving its use comfort; Second, when both the composite seat plate unit 4 and the composite backrest unit 5 are inclinedly installed, the shape of the gap between the outwardly expanding inclined rod 303 and the inclined connecting rod 201, which is large at the top and small at the bottom, can be used as the insertion and fixing point of the composite seat plate unit 4 and the composite backrest unit 5, making the two not easy to move horizontally. Specific reference can be made to the appendix Figure 3 。

[0064] It should be noted that: First, the bent structure formed by the outwardly extending inclined rod 303 and the inclined support rod 301 will indeed generate non-negligible metal fatigue when frequently pressed down by the composite seat plate unit 4. However, as long as the effective service life of this bent structure is ensured not to be significantly shorter than the overall service life of the sofa; Second, the above-mentioned bent structure can further include a reinforcing rod 304, and then finally adjust the effective service life and bending deformation amplitude of this bent structure as a whole, making the former as long as possible and the latter with moderate strength. For details, please refer to the appendix Figure 9 .

[0065] The composite seat plate unit 4 further includes a dual-purpose elastic sheet 404 disposed on the rigid bottom plate 401 and used to press on the inclined connecting rod 201 when the sofa is in use and inserted between the inclined connecting rod 201 and the outwardly extending inclined rod 303 when the sofa is stacked and stored.

[0066] In this embodiment, the material of the dual-purpose elastic sheet 404 is the same as that of the rigid bottom plate 401, but the latter has a relatively smaller thickness. Therefore, when needed, the former can be slightly bent and the latter can be bent relatively greatly.

[0067] The above-mentioned "dual-purpose" means: First, when the composite seat plate unit 4 is in normal use, the dual-purpose elastic sheet 404 presses on the inclined connecting rod 201, and the gap between the composite seat plate unit 4 and the inclined connecting rod 201 at this place is blocked by the dual-purpose elastic sheet 404, preventing the personal belongings c of the sofa user from further falling and getting stuck. For details, please refer to the appendix Figure 7 ; Second, when the composite seat plate unit 4 is removed and the whole sofa is stored, the composite seat plate unit 4 is inserted between two adjacent upper and lower composite seat plate units 4. At this time, the dual-purpose elastic sheet 404 is also inserted between the outwardly extending inclined rod 303 and the inclined connecting rod 201, making the temporary plugging structure of the composite seat plate unit 4 stable enough and not falling out accidentally.

[0068] Among them, the shape of the dual-purpose elastic sheet 404 is: a sector is removed from the original triangle for connecting the rigid bottom plate 401, and then a bow is removed to form an arc-shaped notch, so as to be clamped and matched with the gap between the outwardly extending inclined rod 303 and the inclined connecting rod 201. For details, please refer to the appendix Figure 5 .

[0069] The composite backrest unit 5 further includes a positioning elastic sheet 503 disposed on the rigid backrest plate 501 and used to be inserted between the inclined connecting rod 201 and the outwardly extending inclined rod 303 when the sofa is in use and stacked and stored.

[0070] In this embodiment, the material and the principle of action of the positioning elastic sheet 503 are the same as those of the dual-purpose elastic sheet 404. Whether the sofa is in normal use or stacked for storage, the arc-shaped notch on the positioning elastic sheet 503 always engages and matches the gap between the outwardly expanding inclined rod 303 and the inclined connecting rod 201, ensuring that the composite backrest unit 5 will not shift forward or fall out on the composite seat board unit 4.

[0071] It should be noted that if the upper end outward expansion amplitudes of all the inclined connecting rods 201 are the same, when the sofa is stacked for storage, the removed composite seat board unit 4 can be inserted at any circumferential position between the adjacent backrest support frame units 2 above and below, and it is not necessary to insert and store them alternately left and right with the composite backrest unit 5 as shown in the attached Figure 3 figure.

[0072] The embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art, various modifications can be made without departing from the purpose of the present application. These are all non-creative modifications and are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A sofa with a metal frame structure, characterized in that: The structure comprises a support ring (1), a backrest support frame unit (2) and a seat support frame unit (3) which are integrally welded to form the metal skeleton, a composite seat unit (4) which is snap-fitted onto the seat support frame unit (3), and a composite backrest unit (5) which is arranged on the backrest support frame unit (2) and the composite seat unit (4).

2. The sofa with a metal frame structure according to claim 1, characterized in that: The backrest support frame unit (2) comprises an inclined connecting rod (201) whose lower end is arranged on the support ring (1) and whose upper end vertical projection is located outside the support ring (1), and an armrest ring (202) arranged at the upper end of all the inclined connecting rods (201) and used to support the composite backrest unit (5).

3. The sofa with a metal frame structure according to claim 2, characterized in that: The vertical projection shape of the armrest ring (202) is circular or elliptical, and the armrest ring (202) is provided with an upwardly tilted side for supporting the composite backrest unit (5).

4. The sofa with a metal frame structure according to claim 2, characterized in that: The seat support frame unit (3) comprises an inclined support rod (301) whose lower end is arranged on the support ring (1) and whose upper end has a vertical projection located inside the support ring (1), and a snap ring (302) arranged at the upper end of all the inclined support rods (301) and used to support the composite seat unit (4).

5. The sofa with a metal frame structure according to claim 4, characterized in that: When the sofas are stacked vertically for storage, the support ring (1) of the upper sofa is pressed onto the inclined support rod (301) of the lower sofa.

6. The sofa with a metal frame structure according to claim 4, characterized in that: The composite seat unit (4) comprises a hard bottom plate (401), a seat cushion (402) arranged on the upper surface of the hard bottom plate (401), and a positioning groove (403) arranged on the lower surface of the hard bottom plate (401) and used for inserting the snap ring (302).

7. The sofa with a metal frame structure according to claim 6, characterized in that: The composite backrest unit (5) comprises a hard backboard (501) arranged on the tilting connecting rod (201) and the armrest ring (202), and a backrest cushion (502) arranged on the hard backboard (501) and located on the upper surface of the composite seat unit (4).

8. The sofa with a metal frame structure according to claim 7, characterized in that: The seat support frame unit (3) further comprises an outwardly extending inclined rod (303) whose lower end is arranged on the support ring (1), whose upper end has a vertical projection located outside the support ring (1), and whose upper end is connected to the lower end of the inclined support rod (301) to provide a lifting function for the locking ring (302).

9. The sofa with a metal frame structure according to claim 8, characterized in that: The composite seat unit (4) further comprises a dual-purpose elastic sheet (404) which is arranged on the hard bottom plate (401) and is used to press the tilting connecting rod (201) when the sofa is in use, and is used to be inserted between the tilting connecting rod (201) and the outward-expanding tilting rod (303) when the sofa is stacked and stored.

10. The sofa with a metal frame structure according to claim 8, characterized in that: The composite backrest unit (5) further comprises a positioning elastic sheet (503) which is arranged on the hard backboard (501) and is used to be inserted between the inclined connecting rod (201) and the outwardly extending inclined rod (303) when the sofa is in use and stacked for storage.

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