A sofa

Abstract

The application discloses a sofa and relates to the technical field of furniture, which comprises a bottom frame, a backrest frame, a cushion frame and an armrest frame, the cushion frame is slidably connected to the bottom frame, the backrest frame is rotatably connected to the cushion frame, the backrest frame is provided with a backrest, the armrest frame is provided with a first limiting piece, the first limiting piece is provided with a first sliding groove extending vertically, the backrest frame is provided with a first sliding piece matched with the first sliding groove, the movement track of the highest point of the backrest along the extension direction of the first sliding groove is G1, the highest point of G1 is A1, and the lowest point is A2, G1 extends from A1 to the direction close to the cushion frame first and then extends to A2 in the direction away from the cushion frame, the straight-line distance between A1 and A2 is H1, and the included angle between H1 and the horizontal ground is ɑ≧90°. The application can limit and guide the movement of the backrest frame, effectively reduces the friction between the backrest and the wall, and effectively reduces the back rubbing feeling.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of furniture, in particular to a sofa. BACKGROUND

[0002] With the gradual increase of the importance of the quality of life, more and more young people prefer functional sofas, but in the process of posture conversion, the upper end of the backrest of some sofas placed on the wall side will rub against the wall in the process of the backrest being tilted backward. Therefore, additional extension space needs to be reserved for the functional sofa in the process of use, which is relatively inconvenient. SUMMARY

[0003] The application aims to provide a sofa to solve the problem that the backrest is tilted backward and rubs against the wall in the process of posture conversion of the functional sofa.

[0004] The application provides a sofa adopting the following technical scheme:

[0005] A sofa comprises a bottom frame, the bottom frame is provided with a backrest frame, a cushion frame and an armrest frame, the cushion frame is slidably connected to the bottom frame, the backrest frame is rotationally connected to the cushion frame, the backrest frame is provided with a backrest, the armrest frame is provided with a first limiting piece, the first limiting piece is provided with a first sliding groove extending vertically, the backrest frame is provided with a first sliding piece matched with the first sliding groove, the movement track of the highest point of the backrest along the extension direction of the first sliding groove is G1, the highest point of the G1 is A1, and the lowest point is A2, the G1 extends from the A1 to the direction close to the cushion frame and then extends to the A2 in the direction away from the cushion frame, the straight-line distance between the A1 and the A2 is H1, and the included angle a between the H1 and the horizontal ground is greater than or equal to 90 degrees.

[0006] By adopting the above technical scheme, the cushion frame is slid, the cushion frame drives the backrest frame to move, the first limiting piece moves along the extension direction of the G1 of the first sliding groove, the first limiting piece drives the backrest frame to move, the movement of the backrest frame can be limited and guided, and the stability of the movement of the backrest frame can be improved; when the sofa is placed on the wall side, the included angle a between the H1 and the ground is greater than or equal to 90 degrees, the distance between the A2 and the wall behind the sofa is greater than or equal to the distance between the A1 and the wall behind the sofa, and the friction between the backrest and the wall is effectively reduced.

[0007] Meanwhile, the backrest frame and the cushion frame move synchronously, the relative displacement between the backrest and the back of the user is effectively reduced, the back rubbing feeling is reduced, and the comfort of use is improved.

[0008] Optionally, the seat cushion frame is provided with a first connecting rod, the backrest frame is provided with a second connecting rod, and one end of the first connecting rod away from the seat cushion frame is hingedly connected to one end of the second connecting rod away from the backrest frame.

[0009] By adopting the above technical scheme, when the seat cushion frame moves, the first connecting rod drives the second connecting rod to move, and the second connecting rod drives the backrest frame to move, thereby realizing the synchronous movement of the backrest frame and the seat cushion frame.

[0010] Optionally, the armrest frame is provided with a second limiting piece, the second limiting piece is provided with a second sliding groove extending in the transverse direction, the backrest frame is provided with a second sliding piece matched with the second sliding groove, the lowest point of the backrest along the movement track of the second sliding groove is G2, the starting point of G2 is B1 and the ending point is B2, G2 first extends upward in the vertical direction from B1 and then extends downward in the vertical direction to B2, B2 is the lowest point of G2, the upper end of the seat cushion frame is provided with a seat cushion, the movement track of the upper end of the seat cushion is G3, B2 is located below G3, and the distance between B2 and G3 in the vertical direction is H2, 0mm≦H2≦50mm.

[0011] By adopting the above technical scheme, under the cooperation of the first limiting piece and the first sliding groove and the cooperation of the second limiting piece and the second sliding groove, the movement of the backrest frame is further limited and guided, H2 is the extrusion amount of the backrest and the seat cushion in the vertical direction during the movement process, and tends to zero, which represents no relative displacement, no gap and no mutual interference, thereby being beneficial to the stability of the relative movement of the backrest frame and the seat cushion frame.

[0012] Optionally, the distance of G3 in the sliding direction of the seat cushion frame is L1, the distance between B1 and B2 in the sliding direction of the seat cushion frame is L2, and L1-L2≧0mm.

[0013] By adopting the above technical scheme, L1-L2 is the interference amount of the seat cushion and the backrest in the horizontal direction, the greater the interference amount, the greater the gap or the interference between the seat cushion and the backrest in the horizontal direction, and tends to zero, which represents no relative displacement, no gap and no mutual interference, and L1-L2=0mm is the best, thereby being beneficial to the stability of the relative movement of the backrest frame and the seat cushion frame.

[0014] Optionally, the vertex of G1 in the sliding direction of the seat cushion frame is A3, the distance between A1 and A3 in the horizontal direction is L3, and L3<15mm.

[0015] By adopting the above technical scheme, L3<15mm can make the movement speed of the backrest frame and the seat cushion frame uniform and stable, thereby improving the stability of the relative movement of the backrest frame and the seat cushion frame.

[0016] Optionally, the backrest frame is provided with two limiting pins, the first sliding groove and the second sliding groove are matched with the rod portions of the corresponding limiting pins respectively, the first limiting piece and the second limiting piece are both provided with a gap hole communicating with the first sliding groove and the second sliding groove, and the gap hole is provided for the head portion of the limiting pin to pass through.

[0017] By adopting the technical scheme, the head portion of the limiting pin passes through the gap hole of the first sliding groove and the second sliding groove, the rod portion of the limiting pin is connected in sliding mode with the first sliding groove and the second sliding groove, the first sliding groove and the second sliding groove limit the head portion of the limiting head from moving out, and the quick installation of the backrest frame and the armrest frame can be realized.

[0018] Optionally, the cushion frame is connected in sliding mode to the upper end face of the bottom frame, and the upper end face of the bottom frame is provided in an inclined upward manner.

[0019] By adopting the technical scheme, the upper end of the bottom frame is provided in an inclined manner, the cushion frame is provided in an inclined manner, and the extension direction of G3 is also inclined upward. In the use process, the cushion is provided in an inclined manner, the hip of a person is located in the region near the included angle between the backrest and the cushion, the stability of the person on the backrest and the cushion can be ensured in the relative movement process of the backrest and the cushion, and the comfort in use is improved.

[0020] Optionally, the head portion of the limiting pin is in a spherical shape.

[0021] By adopting the technical scheme, the spherical shape can facilitate the head portion of the limiting pin to pass through the gap hole, and the contact area between the head portion of the limiting pin and the first limiting piece and the second limiting piece is reduced, and the friction is reduced.

[0022] Optionally, the bottom frame is provided with a sliding rail, the sliding rail is provided with a guide groove, the cushion frame is provided with a guide rod matched with the guide groove, and the bottom frame is provided with a driving assembly for driving the cushion frame to slide.

[0023] By adopting the technical scheme, the cooperation of the guide rod and the guide groove has the effect of guiding and limiting the sliding of the cushion frame, and the stability of the movement of the cushion frame is improved.

[0024] Optionally, the backrest is provided with a head portion protruding portion and a waist portion protruding portion.

[0025] By adopting the technical scheme, the head portion protruding portion can support the head and the neck of a user, the waist portion protruding portion can support the waist of a user, and the comfort in use is improved.

[0026] In summary, the present application has at least one of the following beneficial technical effects:

[0027] 1. The sofa is developed in a forward direction. The movement track of the backrest is designed in principle. The most suitable movement track is designed according to the requirement. The effect of zero wall and zero back rubbing is realized. The track verification times can be reduced through theoretical analysis. The gap problem or large interference extrusion problem of the seat cushion and the backrest can be effectively solved.

[0028] 2. The driving assembly pushes the seat cushion frame to slide. The seat cushion frame drives the backrest frame to move. The first limiting piece moves along the extension direction of the first sliding groove G1. The first limiting piece drives the backrest frame to move. The movement of the backrest frame can be limited and guided. The stability of the movement of the backrest frame can be improved. When the sofa is placed at the wall side, the included angle a between H1 and the ground is greater than or equal to 90 degrees. The distance between A2 and the wall behind the sofa is greater than or equal to the distance between A1 and the wall behind the sofa. The friction between the backrest and the wall is effectively reduced. Meanwhile, the backrest frame and the seat cushion frame move synchronously. The relative displacement between the backrest and the back of the user is effectively reduced. The back rubbing feeling is reduced. The comfort of use is improved.

[0029] 3. H1 is the extrusion amount of the movement process of the backrest and the seat cushion in the vertical direction. The relative displacement is not generated when the extrusion amount tends to zero. The gap is not leaked. The mutual interference is not generated. The stability of the relative movement of the backrest frame and the seat cushion frame is improved.

[0030] 4. L1-L2 is the interference amount of the seat cushion and the backrest in the horizontal direction. The larger the interference amount is, the larger the gap or the interference between the seat cushion and the backrest in the horizontal direction is. The relative displacement is not generated when the interference amount tends to zero. The gap is not leaked. The mutual interference is not generated.

[0031] 5. L3 is less than 15 mm. The movement speed of the backrest frame and the seat cushion frame is uniform and stable. The stability of the relative movement of the backrest frame and the seat cushion frame is improved. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is the overall sectional view schematic diagram of the embodiment of the application.

[0033] Figure 2 It is the structure schematic diagram of the armrest frame of the embodiment of the application.

[0034] Figure 3 It is the movement track schematic diagram of the backrest and the seat cushion of the embodiment of the application.

[0035] Figure 4 It is the overall structure schematic diagram of the embodiment of the application.

[0036] Figure 5 It is the enlarged schematic diagram of A of the embodiment of the application.

[0037] Figure 6 It is the structure schematic diagram of the backrest frame and the armrest frame of the embodiment of the application.

[0038] Figure 7 FIG. 1 is a structural schematic diagram of a first sliding member and a second sliding member according to an embodiment of the present application.

[0039] FIG. 1 is a structural schematic diagram of a first sliding member and a second sliding member according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] The accompanying drawings are referred to in the description of the application. Figure 1 - the drawings Figure 7 The application is described in further detail below.

[0041] The application discloses a sofa.

[0042] Referring to Figure 1 , Figure 2 and Figure 3 , a sofa comprises a bottom frame 1, a backrest frame 2, a seat cushion frame 3 and an armrest frame 4 are installed on the bottom frame 1, the armrest frame 4 is two and is located on the two sides of the backrest frame 2 (only one armrest frame 4 is shown in the drawing), the seat cushion frame 3 is slidingly connected to the upper end of the bottom frame 1, the backrest frame 2 is rotationally connected with the seat cushion frame 3, the backrest frame 2 is installed with a backrest 21, the backrest 21 is integrally formed with a head protruding part 211 and a waist protruding part 212 on the side away from the backrest frame 2, the armrest frame 4 is fixedly connected with a first limiting piece 41 on the side close to the backrest frame 2, the first limiting piece 41 is a limiting plate in the shape of a Chinese character 'jia', a vertically extending first sliding groove 411 is formed through the end face of the first limiting piece 41 away from the armrest frame 4, the backrest frame 2 is installed with a first sliding member 22 cooperating with the first sliding groove 411 on the side close to the armrest frame 4, the movement track of the highest point of the backrest 21 along the extension direction of the first sliding groove 411 is G1, the highest point of G1 is A1 and the lowest point is A2, G1 first extends from A1 to the direction close to the seat cushion frame and then extends to A2 in the direction away from the seat cushion frame, the straight line distance between A1 and A2 is H1, and the included angle ɑ between H1 and the horizontal ground is greater than or equal to 90°.

[0043] Referring to Figure 2 , Figure 3The second limiting piece 42 is fixedly connected to one side of the armrest frame 4 close to the backrest frame 2, is a limiting plate in the shape of a Chinese character 'jia', is located below the first limiting piece 41, and has a second sliding groove 421 extending transversely and penetrating an end face of the second limiting piece 42 away from the armrest frame 4. The lowest point of the backrest 21 moves along the extension of the second sliding groove 421, and the extension of G2 has a starting point B1 and an ending point B2. G2 first extends upward in the vertical direction from B1 and then extends downward in the vertical direction to B2. B2 is the lowest point of G2. The upper end of the cushion frame 3 is provided with a cushion 32. The upper end of the cushion 32 moves along G3, and B2 is located below G3. The distance between B2 and G3 in the vertical direction is H2, 0mm≦H2≦50mm, H2 is the extrusion amount of the movement process of the backrest 21 and the cushion 32 in the vertical direction, and tends to zero, representing no relative displacement, no gap, and no mutual interference.

[0044] With reference to Figure 2 and Figure 3 , the distance of G3 in the sliding direction of the cushion frame 3 is L1, the distance of B1 and B2 in the sliding direction of the cushion frame 3 is L2, L1-L2≧0mm, 1-L2 is the interference amount of the cushion 32 and the backrest 21 in the horizontal direction, the greater the interference amount, the greater the horizontal interference or gap between the cushion 32 and the backrest 21, and tends to zero, representing no relative displacement, no gap, and no mutual interference. L1-L2=0mm is the best.

[0045] With reference to Figure 2 and Figure 3 , the vertex of G1 in the sliding direction of the cushion frame 3 is A3, the distance between A1 and A3 in the horizontal direction is L3, and L3<15mm. L3<15mm can make the movement speed of the backrest frame 2 and the cushion frame 3 uniform and stable.

[0046] With reference to Figure 4 , the first connecting rod 31 is fixedly connected to one end of the cushion frame 3 close to the backrest frame 2, the second connecting rod 23 is fixedly connected to one end of the backrest frame 2 close to the cushion frame 3, and one end of the first connecting rod 31 away from the cushion frame 3 is hingedly connected to one end of the second connecting rod 23 away from the backrest frame 2.

[0047] With reference to Figure 5 , the cushion frame 3 is slidingly connected to the upper end face of the bottom frame 1. The upper end face of the bottom frame 1 is arranged in an inclined upward manner. The bottom frame 1 is fixedly connected with a sliding rail 11. The sliding rail 11 is integrally formed with a guide groove 111. The lower end of the cushion frame 3 is fixedly connected with a guide rod 33 in sliding fit with the guide groove 111. The bottom frame 1 is provided with a driving assembly 12 for driving the cushion frame 3 to slide. The driving assembly 12 is a conventional push rod motor. The body of the motor is fixedly connected to the bottom frame 1. The output shaft of the motor is fixedly connected to the cushion frame 3.

[0048] Referring to Figure 6 , Figure 7 , the first sliding piece 22 and the second sliding piece 24 are both limit pins fixedly connected to the side of the back frame 2 close to the armrest frame 4, the first sliding groove 411 and the second sliding groove 421 are respectively matched with the rod part of the corresponding limit pin, the first limit piece 41 and the second limit piece 42 are both provided with a giving hole 412 communicating the first sliding groove 411 and the second sliding groove 421, the giving hole 412 is located at A1 and B1, the giving hole 412 is provided for the head part of the limit pin, and the head part of the limit pin is in a spherical shape.

[0049] The implementation principle of the sofa in the embodiment of the present application is as follows:

[0050] The driving assembly 12 pushes the cushion frame 3 to slide, the cushion frame 3 drives the back frame 2 to move, the first limit piece 41 moves along the extension direction of G1 of the first sliding groove 411, the first limit piece 41 drives the back frame 2 to move, which can limit and guide the movement of the back frame 2 and improve the stability of the movement of the back frame 2; when the sofa is placed at the wall side, the included angle a of H1 and the ground is greater than or equal to 90°, so that the distance between A2 and the wall behind the sofa is greater than or equal to the distance between A1 and the wall behind the sofa, effectively reducing the friction between the backrest 21 and the wall.

[0051] At the same time, the back frame 2 and the cushion frame 3 move synchronously, effectively reducing the relative displacement between the backrest 21 and the back of the user, reducing the rubbing back feeling and improving the comfort of use.

[0052] H1 is the extrusion amount of the movement process of the backrest 21 and the cushion 32 in the vertical direction, which tends to zero, representing no relative displacement, no leakage and no mutual interference, which is beneficial to the stability of the relative movement of the back frame 2 and the cushion frame 3.

[0053] L1-L2 is the interference amount of the cushion 32 and the backrest 21 in the horizontal direction, the greater the interference amount, the greater the horizontal interference or gap between the cushion 32 and the backrest 21, and the closer to zero, representing no relative displacement, no leakage and no mutual interference, L1-L2=0mm is the best, which is beneficial to the stability of the relative movement of the back frame 2 and the cushion frame 3.

[0054] L3<15mm can make the movement speed of the back frame 2 and the cushion frame 3 uniform and stable, improving the stability of the relative movement of the back frame 2 and the cushion frame 3.

[0055] The above are the preferred embodiments of the present application, which do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A sofa comprising a base frame (1) provided with a backrest frame (2), a seat cushion frame (3) and an armrest frame (4), characterized in that: The cushion frame (3) is slidably connected to the bottom frame (1), the backrest frame (2) is rotatably connected to the cushion frame (3), the backrest frame (2) is provided with a backrest (21), the armrest frame (4) is provided with a first limiting piece (41), the first limiting piece (41) is provided with a vertically extending first sliding groove (411), the backrest frame (2) is provided with a first sliding piece (22) matched with the first sliding groove (411), the highest point of the backrest (21) along the movement track of the first sliding groove (411) is G1, the highest point of the G1 is A1, the lowest point is A2, the G1 first extends from the A1 to the direction close to the cushion frame (3) and then extends to the A2 away from the cushion frame (3), the straight line distance between the A1 and the A2 is H1, and the angle α between the H1 and the horizontal ground is greater than or equal to 90 degrees.

2. The sofa of claim 1, wherein: The cushion frame (3) is provided with a first connecting rod (31), the backrest frame (2) is provided with a second connecting rod (23), and one end of the first connecting rod (31) away from the cushion frame (3) is hingedly connected to one end of the second connecting rod (23) away from the backrest frame (2).

3. The sofa of claim 1, wherein: The armrest frame (4) is provided with a second limiting piece (42), the second limiting piece (42) is provided with a transversely extending second sliding groove (421), the backrest frame (2) is provided with a second sliding piece (24) matched with the second sliding groove (421), the lowest point of the backrest (21) along the extension of the second sliding groove (421) is G2, the starting point of the G2 is B1, and the terminal point is B2, the G2 first extends vertically upward from the B1 and then extends vertically downward to the B2, the B2 is the lowest point of the G2, the upper end of the cushion (32) of the cushion frame (3) is provided with a cushion (32), the movement track of the upper end of the cushion (32) is G3, the B2 is located below the G3, the distance between the B2 and the G3 in the vertical direction is H2, and 0mm≦H2≦50mm.

4. The sofa of claim 3, wherein: The distance of the G3 in the sliding direction of the cushion frame (3) is L1, the distance between the B1 and the B2 in the sliding direction of the cushion frame (3) is L2, and L1-L2 is greater than or equal to 0mm.

5. The sofa of claim 1, wherein: The vertex of the G1 in the sliding direction of the cushion frame (3) is A3, the distance between the A1 and the A3 in the horizontal direction is L3, and L3 is less than 15mm.

6. The sofa of claim 3, wherein: The first sliding piece (22) and the second sliding piece (24) are both limiting pins fixedly connected to the backrest frame (2), the first sliding groove (411) and the second sliding groove (421) are matched with the rod portions of the corresponding limiting pins, the first limiting piece (41) and the second limiting piece (42) are both provided with a giving hole (412) communicating the first sliding groove (411) and the second sliding groove (421), and the head portion of the limiting pin is provided in the giving hole (412).

7. The sofa of claim 3, wherein: The cushion frame (3) is slidingly connected to the upper end surface of the bottom frame (1), and the upper end surface of the bottom frame (1) is arranged in an inclined upward manner.

8. The sofa of claim 6, wherein: The head of the limiting pin is in a spherical shape.

9. The sofa of claim 1, wherein: The bottom frame (1) is provided with a sliding rail (11) provided with a guide groove (111), the cushion frame (3) is provided with a guide rod (33) matched with the guide groove (111), and the bottom frame (1) is provided with a driving assembly (12) for driving the cushion frame (3) to slide.

10. The sofa of claim 1, wherein: The back cushion is provided with a head protruding portion (211) and a waist protruding portion (212).

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