Sofa base assembly and sofa seat

Abstract

The utility model discloses a sofa base assembly and a sofa seat. The sofa base assembly supports the rack and is used for being supported on the ground; the seat frame is assembled on the supporting rack; the backrest rack comprises a backrest frame and a rotating arm, the front end of the rotating arm is provided with a first rotating point rotationally connected with the rear end of the seat frame, the rear end of the rotating arm is provided with a second rotating point rotationally connected with the front end of the backrest frame, and the distance between the backrest frame and the front end of the seat frame is larger than the distance between the rotating arm and the front end of the seat frame; and the distance between the first rotating point and the front end of the seat frame is 60-80cm. Through the arrangement, the sitting depth of the sofa base assembly is increased, the suspension feeling of the rear sides of knees is reduced, the pressure distribution of thighs is more uniform, fatigue caused by suspension of legs is not easily caused during long-time sitting, and the sitting depth is not reduced during rotation of the backrest frame through geometric constraint linkage of the rotating arm and the backrest frame, so that the supporting length of the thighs is kept constant.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of furniture, in particular to a sofa base assembly and a sofa seat. BACKGROUND

[0002] With the improvement of living quality, sofa seats have become important household items in multiple scenarios such as office, study and entertainment. However, the sitting depth design of the existing sofa seats has obvious defects: the common 50-60cm sitting depth cannot meet the ergonomic requirements, resulting in obvious suspension of the back side of the knees when the user sits for a long time, and it is easy to produce fatigue. More seriously, when the backrest angle is adjusted, the sitting depth will be reduced, making the insufficient thigh support length further reduced, and the suspension problem becomes more prominent, so that the user cannot obtain comfortable support in any use posture, seriously affecting the use experience and health comfort. CONTENT OF THE UTILITY MODEL

[0003] The utility model discloses a sofa base assembly and sofa seat, which can increase the sitting depth of the sofa base assembly, reduce the suspension feeling of the back side of the knees, and effectively maintain the constant support length of the sofa seat to the thighs.

[0004] In order to achieve the above-mentioned purpose, the utility model discloses a sofa base assembly, which comprises: a support frame for supporting on the ground; a seat frame assembled on the support frame; a backrest frame, the backrest frame comprises a backrest frame and a rotating arm, the front end of the rotating arm is provided with a first rotation point rotatably connected with the rear end of the seat frame, the rear end of the rotating arm is provided with a second rotation point rotatably connected with the front end of the backrest frame, and the distance between the backrest frame and the front end of the seat frame is greater than the distance between the rotating arm and the front end of the seat frame, and the distance between the first rotation point and the front end of the seat frame is 60-80cm.

[0005] As an optional implementation, there is an included angle between the plane where the seat frame is located and the horizontal plane.

[0006] As an optional implementation, the seat frame comprises two symmetrical linkage frames and a cross beam; the linkage frame is assembled on the support frame, the rotating arm is rotatably connected to the rear end of the linkage frame, and the front end of the linkage frame is provided with a first extension part; the cross beam is fixedly connected to the first extension part, and the distance between the first rotation point and the cross beam is 60-80cm.

[0007] As an optional implementation, it further comprises a foot pad frame, and the foot pad frame is assembled on the front end of the linkage frame.

[0008] As an optional implementation, the support frame comprises a supporting frame, the seat frame is assembled on the supporting frame, a first supporting leg is connected to the rear end of the supporting frame, and a second extending part is arranged at the front end of the supporting frame, and the second extending part is connected with a second supporting leg.

[0009] As an optional implementation, a guide sliding groove is arranged on the supporting frame, and the seat frame is slidingly connected to the guide sliding groove.

[0010] As an optional implementation, a handrail is further provided, and the handrail is detachably connected to the outer side of the support frame.

[0011] As an optional implementation, a clamping groove is arranged on the side of the support frame facing the handrail, a clamping buckle is arranged on the side of the handrail facing the support frame, and the clamping buckle is inserted into the clamping groove.

[0012] As an optional implementation, the inner diameter of the clamping groove is arranged to be gradually reduced from top to bottom.

[0013] Based on the same inventive concept, the application further provides a sofa seat, which comprises the sofa base assembly as described above.

[0014] Compared with the prior art, the sofa base assembly has the following beneficial effects:

[0015] By setting the distance between the first rotation point and the front end of the seat frame to 60-80 cm, the sitting depth of the sofa base assembly is increased, the feeling of suspension at the back of the knees is reduced, the pressure distribution of the thighs is more uniform, and fatigue caused by suspension of the legs during long sitting is avoided. In addition, through the geometric constraint linkage between the rotating arm and the backrest frame, the distance between the backrest frame and the front end of the seat frame is always greater than the distance between the rotating arm and the front end of the seat frame, so that the sitting depth parameter does not decrease when the backrest frame rotates, thereby maintaining the constant support length of the sofa seat to the thighs, and avoiding the reduction of the effective support length of the seat surface caused by the backrest of the traditional sofa seat. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 is a structural schematic view of the sofa base assembly of the present application;

[0018] Figure 2 is another structural schematic view of the sofa base assembly of the present application;

[0019] Figure 3 is a structural schematic diagram of a foot pad frame of the present application;

[0020] Figure 4 is a structural schematic diagram of a sofa base assembly (with an armrest) of the present application;

[0021] Figure 5 is a structural schematic diagram of a sofa base assembly (with a hidden armrest) of the present application;

[0022] Figure 6 is an assembly schematic diagram of a buckle and a slot of the present application.

[0023] Main figure mark explanation:

[0024] 1, support frame; 11, support frame; 12, first support leg; 13, second extension part; 14, second support leg; 15, guide sliding groove; 16, slot; 2, seat frame; 21, linkage frame; 22, cross beam; 23, first extension part; 3, backrest frame; 31, backrest frame; 32, rotating arm; 321, first rotating point; 322, second rotating point; 4, foot pad frame; 5, armrest; 51, buckle. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0027] In addition, in addition to indicating the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific situation.

[0028] In addition, the terms "mounting", "arrangement", "provided with", "connected", "linked" should be understood broadly. For example, it can be fixed connection, detachable connection, or integral structure; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication between two devices, elements or components. The specific meaning of the above terms in the utility model can be understood by the person skilled in the art according to the specific circumstances.

[0029] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific type and structure can be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0030] The technical scheme of the utility model will be further described below in conjunction with embodiments and drawings.

[0031] Please refer to Figure 1 and Figure 2 The sofa base assembly provided by the embodiments of the application comprises a support frame 1, a seat frame 2 and a backrest frame 3. In some embodiments, the support frame 1 is used to support on the ground; the seat frame 2 is assembled on the support frame 1; the backrest frame 3 comprises a backrest frame 31 and a rotating arm 32, the front end of the rotating arm 32 is provided with a first rotating point 321 rotatably connected with the rear end of the seat frame 2, the rear end of the rotating arm 32 is provided with a second rotating point 322 rotatably connected with the front end of the backrest frame 31, and the distance between the backrest frame 31 and the front end of the seat frame 2 is greater than the distance between the rotating arm 32 and the front end of the seat frame 2, and the distance between the first rotating point 321 and the front end of the seat frame 2 is 60-80 cm. Preferably, by setting the distance between the first rotating point 321 and the front end of the seat frame 2 to 60-80 cm, the seat depth of the sofa base assembly is increased, the feeling of the back side of the knees being suspended is reduced, the pressure distribution of the thighs is more uniform, fatigue caused by the legs being suspended during long sitting is avoided, and through the geometric constraint linkage of the rotating arm 32 and the backrest frame 31, it is ensured that the distance between the backrest frame 31 and the front end of the seat frame 2 is always greater than the distance between the rotating arm 32 and the front end of the seat frame 2, so that the seat depth parameter does not decrease when the backrest frame 31 rotates, thereby maintaining the constant support length of the sofa seat to the thighs, and avoiding the reduction of the effective support length of the seat surface caused by the backrest of the traditional sofa seat being reclined.

[0032] Please refer to Figure 2In some embodiments, the plane in which the seat frame 2 lies forms an angle with the horizontal plane. Preferably, the seat frame 2 is inclined forward, i.e. the front end of the seat frame 2 is higher than the rear end of the seat frame 2, by virtue of the angle between the plane in which the seat frame 2 lies and the horizontal plane, so as to guide the user to move the hips backward and fit the backrest more closely, reduce the lumbar pressure, and be more comfortable for long sitting, especially suitable for long sitting office or learning scenarios.

[0033] Please refer to Figure 1 and Figure 2 In some embodiments, the seat frame 2 comprises two symmetrical linkage frames 21 and cross beams 22; the linkage frame 21 is assembled on the support frame 1, the rotating arm 32 is rotatably connected to the rear end of the linkage frame 21, and the front end of the linkage frame 21 is provided with a first extension part 23; the cross beam 22 is fixedly connected to the first extension part 23, and the distance between the first rotating point 321 and the cross beam 22 is 60-80 cm. Optionally, the rotating arm 32 is directly or indirectly rotatably connected to the rear end of the linkage frame 21; optionally, the linkage frame 21 is provided in an extension along the front-rear direction, the first extension part 23 is fixedly connected to the front end of the linkage frame 21, or the first extension part 23 is integrally formed with the linkage frame 21, so as to extend the length of the seat frame 2; optionally, the cross beam 22 is provided in an extension along the transverse direction, and the cross beam 22 is fixedly connected to the two first extension parts 23, so that the cross beam 22, the first extension part 23 and the linkage frame 21 form a frame structure, thereby improving the stability of the seat frame 2; in this way, the distance between the first rotating point 321 and the cross beam 22 is the seat depth L, as shown in Figure 2 , wherein L is 60-80 cm, and the distance between the backrest frame 31 and the cross beam 22 is always greater than the distance between the rotating arm 32 and the cross beam 22, so that the seat depth parameter does not decrease when the backrest frame 31 rotates; further, the linkage frame 21 can also be fixedly connected with a rear beam provided in an extension along the transverse direction, so that the rear beam, the cross beam 22, the first extension part 23 and the linkage frame 21 form a closed frame structure, thereby further improving the stability of the seat frame 2 and significantly enhancing the bending or torsional stiffness of the seat frame 2 as a whole; in embodiments, the fixed connection includes but is not limited to screw connection, bolt connection, welding, riveting, etc.

[0034] Please refer to Figure 1 , Figure 2 and Figure 3In some embodiments, the footrest frame 4 is assembled at the front end of the linkage frame 21. Optionally, the footrest frame 4 can be extended or retracted, and the extension or retraction of the leg frame will drive the linkage frame 21 to rotate the backrest frame 3, so that the sofa base assembly can be transformed between the sitting position and the lying position. Optionally, a linear electric actuator is further included, and the output end of the linear electric actuator is connected with the footrest frame 4, so that the linear electric actuator drives the leg frame to extend or retract. In this embodiment, the footrest frame 4 is assembled at the front end of the linkage frame 21, so that the leg frame can be retracted below the first extension part 23, thereby fully utilizing the space and reducing the occupied space of the sofa base assembly.

[0035] Please refer to Figure 1 and Figure 2 In some embodiments, the support frame 1 includes a support frame 11, and the seat frame 2 is assembled on the support frame 11. The rear end of the support frame 11 is connected with a first support leg 12, and the front end of the support frame 11 is provided with a second extension part 13. The second extension part 13 is connected with a second support leg 14. Optionally, the second extension part 13 extending forward is arranged at the front end of the support frame 11, and the second support leg 14 is connected with the second extension part 13. The first support leg 12 and the second support leg 14 form a wide-span support structure in the front-rear direction, which significantly enhances the overturning stability of the sofa base assembly, effectively solves the problem of center of gravity offset caused by increased seat depth, and ensures the stability of the sofa base assembly during use.

[0036] Further, in order to improve the stability of the sofa base assembly, the linkage frame 21 is arranged in one-to-one correspondence with the support frame 11, that is, two linkage frames 21 correspond to two support frames 11, and one support frame 11 independently supports one linkage frame 21, forming a left-right symmetrical force transmission path, achieving uniform distribution of load, effectively reducing the risk of unilateral stress concentration, preventing the phenomenon of uneven load caused by uneven force on the seat frame 2, and providing more stable foundation support for the seat frame 2.

[0037] Please refer to Figure 1 and Figure 2In some embodiments, the support frame 1 is provided with a guide sliding groove 15, and the seat frame 2 is slidingly connected to the guide sliding groove 15. Optionally, a pulley or a sliding block is slidingly connected in the guide sliding groove 15, and the pulley or the sliding block is connected to the seat frame 2. When the leg frame is stretched or retracted, the linkage frame 21 moves along a predetermined track under the constraint of the guide sliding groove 15, so as to accurately control the rotation angle of the back frame 3, ensure the stability of the sofa base assembly movement, eliminate the deviation and jamming of the linkage frame 21 during the movement, effectively reduce the movement friction resistance, and reduce the wear of the moving parts.

[0038] Referring to Figure 4 In some embodiments, the sofa base assembly further comprises an armrest 5 which is detachably connected to the outer side of the support frame 1. In this way, the armrest 5 can be independently installed or detached from the support frame 1, so that the armrest 5 can be detached according to the actual scene and the user's preference, without affecting the structural integrity of the support frame 1. When the armrest 5 is damaged, the damaged armrest 5 can be replaced individually, facilitating cleaning and maintenance work.

[0039] Referring to Figure 4 , Figure 5 and Figure 6 In some embodiments, the side of the support frame 1 facing the armrest 5 is provided with a clamping groove 16, and the side of the armrest 5 facing the support frame 1 is provided with a clamping buckle 51 which is inserted into the clamping groove 16. Optionally, the clamping buckle 51 and the clamping groove 16 are inserted and matched to realize the quick assembly of the armrest 5 and the support frame 1. Optionally, the clamping groove 16 is arranged on the support frame 11. Optionally, the number of clamping grooves 16 is multiple, and the multiple clamping grooves 16 are arranged in the front-rear direction. The clamping grooves 16 and the clamping buckles 51 are arranged one by one. In this way, the multiple clamping grooves 16 and the multiple clamping buckles 51 are inserted and matched with each other, avoiding local stress concentration, improving the overall fatigue strength, and preventing damage from occurring when being frequently disassembled, thereby improving the stability of the connection between the armrest 5 and the support frame 11.

[0040] Referring to Figure 6 In some embodiments, the inner diameter of the clamping groove 16 is arranged in a decreasing manner from top to bottom. In this way, the clamping groove 16 forms a progressive locking structure, and the inner diameter of the clamping groove 16 decreases in a gradient manner along the insertion direction (from top to bottom). In this way, the inner diameter of the upper end entrance of the clamping groove 16 is the largest, facilitating the insertion of the clamping buckle 51 into the clamping groove 16. The inner diameter of the lower end of the clamping groove 16 is the smallest, so that the clamping buckle 51 and the lower end of the clamping groove 16 form an interference fit, reliably fixing the clamping buckle 51 in the clamping groove 16, and preventing the clamping buckle 51 from being loosened due to the influence of external vibration.

[0041] In some embodiments, a sofa seat comprises a sofa base assembly as described above.

[0042] In some embodiments, by setting the distance between the first rotation point 321 and the front end of the seat frame 2 to 60-80 cm, which is larger than the conventional 50-60 cm, the seat depth of the sofa base assembly is significantly increased, the feeling of the back of the knees being suspended is reduced, the pressure distribution on the thighs is more uniform, and fatigue caused by the suspension of the legs during long sitting is less likely to occur. Furthermore, through the geometric constraint linkage between the rotating arm 32 and the backrest frame 31, the distance between the backrest frame 31 and the front end of the seat frame 2 is always greater than the distance between the rotating arm 32 and the front end of the seat frame 2, so that the seat depth parameter does not decrease when the backrest frame 31 rotates, thereby maintaining the constant support length of the sofa seat for the thighs, avoiding the reduction of the effective support length of the seat surface caused by the backrest of the traditional sofa seat being reclined, and further, the plane on which the seat frame 2 is located has an angle with the horizontal plane, so that the seat frame 2 is inclined forward to guide the user's hips to move backward and fit more closely with the backrest, reduce the lumbar pressure, and be more comfortable during long sitting, which is especially suitable for long sitting office or learning scenarios. Further, the outer side of the support frame 11 is detachably connected with the armrest 5, and optionally, the quick assembly of the armrest 5 and the support frame 1 is realized through the plug-in cooperation of the buckle 51 and the clamping groove 16, so that the disassembly and assembly of the armrest 5 can be followed by the actual scene and the user's preference, without affecting the structural integrity of the support frame 1, and when the armrest 5 is damaged, the damaged armrest 5 can be replaced separately, facilitating cleaning and maintenance work.

[0043] The sofa base assembly and the sofa seat disclosed in the above embodiments of the utility model are described in detail, and the principles and implementation modes of the utility model are described by applying specific examples. The above embodiment description is only used to help understand the sofa base assembly and the sofa seat and the core idea thereof; meanwhile, for those skilled in the art, the specific implementation modes and application ranges will be changed according to the idea of the utility model, and the content of the specification should not be understood as a limitation of the utility model.

Claims

1. A sofa base assembly, characterized in that, include: Support frame (1) for supporting the machine on the ground; Seat frame (2), the seat frame (2) is assembled on the support frame (1); The backrest frame (3) includes a backrest frame (31) and a rotating arm (32). The front end of the rotating arm (32) is provided with a first rotating point (321) that is rotatably connected to the rear end of the seat frame (2). The rear end of the rotating arm (32) is provided with a second rotating point (322) that is rotatably connected to the front end of the backrest frame (31). The distance between the backrest frame (31) and the front end of the seat frame (2) is greater than the distance between the rotating arm (32) and the front end of the seat frame (2). The distance between the first rotating point (321) and the front end of the seat frame (2) is 60-80cm.

2. The sofa base assembly according to claim 1, characterized in that: There is an angle between the plane where the seat frame (2) is located and the horizontal plane.

3. The sofa base assembly according to claim 1, characterized in that: The seat frame (2) includes two symmetrically arranged linkage frames (21) and a crossbeam (22); The linkage frame (21) is mounted on the support frame (1), the rotating arm (32) is rotatably connected to the rear end of the linkage frame (21), and the front end of the linkage frame (21) is provided with a first extension (23); The crossbeam (22) is fixedly connected to the first extension (23), and the distance between the first rotation point (321) and the crossbeam (22) is 60-80cm.

4. The sofa base assembly according to claim 3, characterized in that: It also includes a foot support frame (4), which is mounted on the front end of the linkage frame (21).

5. The sofa base assembly according to claim 1, characterized in that: The support frame (1) includes a support frame (11), the seat frame (2) is mounted on the support frame (11), the rear end of the support frame (11) is connected to a first support leg (12), the front end of the support frame (11) is provided with a second extension (13), and the second extension (13) is connected to a second support leg (14).

6. The sofa base assembly according to claim 5, characterized in that: The support frame (11) is provided with a guide groove (15), and the seat frame (2) is slidably connected to the guide groove (15).

7. The sofa base assembly according to claim 1, characterized in that: It also includes a handrail (5), which is detachably connected to the outside of the support frame (1).

8. The sofa base assembly according to claim 7, characterized in that: The support frame (1) has a slot (16) on the side facing the handrail (5), and the handrail (5) has a buckle (51) on the side facing the support frame (1). The buckle (51) is inserted into the slot (16).

9. The sofa base assembly according to claim 8, characterized in that: The inner diameter of the slot (16) decreases from top to bottom.

10. A sofa chair, characterized in that, include: The sofa base assembly as described in any one of claims 1-9.

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