A footstool structure and sofa frame

Abstract

This utility model belongs to the field of furniture technology, specifically relating to a footstool structure and a sofa frame. The footstool structure includes a fixed frame and an extended frame, which are connected by a folding mechanism; the folding mechanism includes a first connecting member, a second connecting member, and a connecting spring. Through the design of the folding mechanism, this utility model not only increases the leg support length but also offers advantages such as effortless operation and rapid response.

Description

Technical Field

[0001] This utility model belongs to the field of furniture technology, specifically relating to a footstool structure and a sofa frame. Background Technology

[0002] As the foundation supporting the entire sofa structure, the sofa frame directly affects the user experience and durability. Most existing sofa designs include a footrest to support the user's legs and feet. For example, document CN218832377U discloses a sofa frame including a base, a drive mechanism, and multiple adjustment and deformation devices. Each adjustment and deformation device includes a seat cushion adjustment frame, a footrest rotation frame, and a backrest rotation frame. One end of the footrest rotation frame is movably connected to the other end of the seat cushion support rod. The drive mechanism is mounted on the base and simultaneously drives the movement of multiple footrest rotation frames.

[0003] However, the above structure still has a problem: in order to be effectively stored, the footrest is generally perpendicular to the ground and its bottom is parallel to the bottom of the sofa. However, due to the height limitation of the sofa, the length of the footrest is also limited, which means that the legs cannot be fully supported when they are straight, and the legs cannot be fully stretched, affecting the user's comfort. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a footrest structure and sofa frame. By optimizing the footrest structure, the aim is to extend the footrest support length and improve user comfort.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A foot pedal structure includes a fixed frame and an extended frame, which are connected by a folding mechanism; the folding mechanism includes a first connector, a second connector, and a connecting spring.

[0007] The first connector includes a first fixing plate, a first connecting plate disposed on the first fixing plate, a first connecting hole disposed on the end of the first connecting plate away from the first fixing plate, and a first fixing point disposed on the first fixing plate.

[0008] The second connector includes a second fixing plate, a second connecting plate disposed on the second fixing plate, a second connecting hole disposed on the end of the second connecting plate away from the second fixing plate, and a second fixing point disposed on the second fixing plate;

[0009] The first connecting hole and the second connecting hole are connected by connecting bolts, and the included angle α between the first connecting plate and the second connecting plate is in the range of 50°~300°;

[0010] The two ends of the connecting spring are respectively connected to the first fixed point and the second fixed point.

[0011] As a further preferred embodiment of this utility model, the distance between the first fixed point and the second fixed point is L1 when the included angle α is at its minimum value, and the distance between the first fixed point and the second fixed point is L2 when the included angle α is at its maximum value, where L1 ≥ L2.

[0012] As a further preferred embodiment of this invention, the connecting spring is in its original state or in a stretched state when the included angle α is at its minimum value; and the connecting spring is in its original state when the included angle α is at its maximum value.

[0013] As a further preferred embodiment of the present invention, the second connector further includes an abutting protrusion disposed on the second connecting plate; when the included angle α is at its minimum value, the abutting protrusion abuts against the side of the first connecting plate.

[0014] As a further preferred embodiment of the present invention, when the abutting protrusion abuts against the side of the first connecting plate, the angle β between the extension line of the first fixing plate and the extension line of the second fixing plate is in the range of 160°~200°.

[0015] As a further preferred embodiment of this utility model, the first fixing plate is provided with a first mounting hole, and the second fixing plate is provided with a second mounting hole.

[0016] As a further preferred embodiment of this utility model, both the first fixing point and the second fixing point include a fixing rod and a limiting block disposed on the end of the fixing rod; two arc-shaped hooks are respectively disposed at both ends of the connecting spring; the outer diameter of the fixing rod is less than the inner diameter of the arc-shaped hook, and the outer diameter of the arc-shaped hook is less than the minimum length of the limiting block.

[0017] As a further preferred embodiment of the present invention, the first fixing plate and the first connecting plate are connected by a first transition portion; the second fixing plate and the second connecting plate are connected by a second transition portion.

[0018] A sofa frame, including any of the footrest structures described above.

[0019] The beneficial effects of this utility model are:

[0020] This invention, through the design of a folding mechanism, not only increases the leg support length but also has the advantages of easy operation and rapid response. Attached Figure Description

[0021] Appendix Figure 1 This is a schematic diagram of the installation structure of this utility model.

[0022] Appendix Figure 2 This is a schematic diagram of the connection structure of the folding mechanism of this utility model.

[0023] Appendix Figure 3 This is a schematic diagram of the structure of the first and second connecting parts of this utility model.

[0024] Appendix Figure 4 This is a schematic diagram showing the positions of the first and second connecting members in the unfolded state of the folding mechanism of this utility model.

[0025] Appendix Figure 5 This is a schematic diagram showing the positions of the first and second connecting members in the intermediate state of this utility model.

[0026] Appendix Figure 6 This is a schematic diagram showing the positions of the first and second connectors in the folded state of this utility model.

[0027] Figure description: Fixed frame 11, extension frame 12, first connector 2, second connector 3, connecting spring 4, connecting bolt 5;

[0028] First fixing plate 21, first connecting plate 22, first connecting hole 23, first fixing point 24, first mounting hole 25, first transition part 26;

[0029] Second fixing plate 31, second connecting plate 32, second connecting hole 33, second fixing point 34, abutting protrusion 35, second mounting hole 36, second transition part 37;

[0030] Fixed rod 341, limiting block 342;

[0031] Arc-shaped hook 41. Detailed Implementation

[0032] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example 1

[0035] This embodiment provides a foot pedal structure, as shown in the attached figure. Figure 1 ~Appendix Figure 3 As shown, it includes a fixed frame 11 and an extension frame 12, which are connected by a folding mechanism; the folding mechanism includes a first connector 2, a second connector 3, and a connecting spring 4;

[0036] The first connector 2 includes a first fixing plate 21, a first connecting plate 22 disposed on the first fixing plate 21, a first connecting hole 23 disposed on the end of the first connecting plate 22 away from the first fixing plate 21, and a first fixing point 24 disposed on the first fixing plate 21.

[0037] The second connector 3 includes a second fixing plate 31, a second connecting plate 32 disposed on the second fixing plate 31, a second connecting hole 33 disposed on the end of the second connecting plate 32 away from the second fixing plate 31, and a second fixing point 34 disposed on the second fixing plate 31.

[0038] The first connecting hole 23 and the second connecting hole 33 are connected by connecting bolts 5, and the included angle α between the first connecting plate 22 and the second connecting plate 32 is in the range of 50°~300°;

[0039] The two ends of the connecting spring 4 are respectively connected to the first fixed point 24 and the second fixed point 34.

[0040] It is worth noting that the included angle α corresponds to the unfolded state of the folding mechanism when it is at its minimum value, and the included angle α corresponds to the folded state of the folding mechanism when it is at its maximum value. The range of the included angle α is determined by a variety of factors, the main one being the connecting spring 4. The specific principle is as follows: the connecting spring 4 has an original state (the spring's natural length) and a stretched state (the two ends of the spring are subjected to opposite pulling forces, and the length of the side is the same); since the two ends of the connecting spring 4 are connected to the first fixed point 24 and the second fixed point 34, the actual length of the connecting spring 4 is equivalent to the distance between the first fixed point 24 and the second fixed point 34.

[0041] So, as attached Figure 4 As shown, when the included angle α is at its minimum value, the distance between the first fixed point 24 and the second fixed point 34 is L1 (equivalent to the actual length of the connecting spring 4). At this time, the connecting spring 4 should be in a balanced state. The balance state can be achieved by the connecting spring 4 itself returning to its natural length, or by the first connecting piece 2 and the second connecting piece 3 approaching and abutting each other under the action of the tension of the connecting spring 4 (at this time, the connecting spring 4 is in a stretched state). Therefore, when the included angle α is at its minimum value, the connecting spring 4 can be in its original state or in a stretched state.

[0042] So, as attached Figure 6 As shown, when the included angle α is at its maximum value, the distance between the first fixed point 24 and the second fixed point 34 is L2 (equivalent to the actual length of the connecting spring 4). At this time, the connecting spring 4 should be in a balanced state. At this time, the first connecting piece 2 and the second connecting piece 3 are not in contact, so the connecting spring 4 should be in its original state.

[0043] Therefore, L1≥L2.

[0044] As a further preferred embodiment, the second connector 3 further includes an abutment protrusion 35 disposed on the second connecting plate 32; when the included angle α is at its minimum value, the abutment protrusion 35 abuts against the side of the first connecting plate 22. It is understood that when the abutment protrusion 35 abuts against the side of the first connecting plate 22, other parts of the first connector 2 and the second connector 3 should not be in contact, while the abutment protrusion 35 can limit the minimum value of the included angle α, ensuring that the second connector 3 has sufficient supporting strength.

[0045] Furthermore, as shown in the appendix Figure 4 As shown, when the abutting protrusion 35 abuts against the side of the first connecting plate 22, the angle β between the extension line of the first fixing plate 21 and the extension line of the second fixing plate 31 ranges from 160° to 200°. The purpose of this setting is to ensure that the angle between the first connecting member 2 and the second connecting member 3 is close to 180° in the unfolded state, thereby increasing the contact area between the foot pedal structure and the leg and improving comfort.

[0046] In this embodiment, the first fixing plate 21 is provided with a first mounting hole 25, and the second fixing plate 31 is provided with a second mounting hole 36. The first mounting hole 25 is connected to the fixing frame 11 by connecting bolts, and the second mounting hole 36 is connected to the extension frame 12 by connecting bolts. The fixing frame 11 and the extension frame 12 are generally rectangular frames, manufactured by metal welding, which is well-known in the art and will not be described further.

[0047] As a further preferred embodiment, both the first fixing point 24 and the second fixing point 34 include a fixing rod 341 and a limiting block 342 disposed on the end of the fixing rod 341; two arc-shaped hooks 41 are respectively disposed at both ends of the connecting spring 4; the outer diameter of the fixing rod 341 is less than the inner diameter of the arc-shaped hooks 41, and the outer diameter of the arc-shaped hooks 41 is less than the minimum length of the limiting block 342. The purpose of this arrangement is to ensure that the arc-shaped hooks 41 will not fall off when the second connecting member 3 rotates relative to the first connecting member 2, and also to facilitate the disassembly of the connecting spring 4.

[0048] As a further preferred embodiment, the first fixing plate 21 and the first connecting plate 22 are connected by a first transition portion 26; the second fixing plate 31 and the second connecting plate 32 are connected by a second transition portion 37. The first transition portion 26 and the second transition portion 27 can achieve a smooth transition between the fixing plate and the connecting plate, reduce wear between components, and avoid sharp protrusions that could damage subsequently installed soft padding or cause safety hazards.

[0049] The working principle of this embodiment is as follows:

[0050] As attached Figure 4 ~Appendix Figure 6 As shown, the folding mechanism is in its unfolded, intermediate, and folded states, respectively. Due to the change in α, the distance between the first fixed point 24 and the second fixed point 34 changes (equivalent to the actual length of the connecting spring 4), while the distance (r2, r1) between the first fixed point 24, the second fixed point 34, and the hinge center remains unchanged. Therefore, a triangle is formed, from which the formula can be derived:

[0051] ;

[0052] Lx is the distance between the first fixed site 24 and the second fixed site 34;

[0053] r1 is the distance between the second fixed point 34 and the hinge center;

[0054] r2 is the distance between the first fixed point 24 and the center of the hinge circle;

[0055] A is the angle between r1 and r2;

[0056] This relationship indicates that Lx is a function of A. As A changes, Lx also changes accordingly, and has several special states:

[0057] When A = 90° ;

[0058] When A = 180°, the triangle degenerates (this condition does not hold), but when A is close to 180°, Lx is at its maximum (named L3).

[0059] Within the range of α (50° to 300°), A and α are positively correlated.

[0060] Therefore, when α varies within the range of 50° to 300°, it includes the first stage—critical value (A equals 180°)—second stage: during the first stage—critical value process, Lx increases and reaches its maximum value (L3) at the critical value; during the critical value (A equals 180°)—second stage process, Lx decreases.

[0061] Therefore, the transition from the unfolded state to the intermediate state (equivalent to the first stage—the critical value) requires overcoming the tension of the connecting spring 4; while the transition from the intermediate state to the retracted state (equivalent to the critical value—the second stage) can be achieved quickly under the tension of the connecting spring 4; conversely, the transition from the intermediate state to the unfolded state can be achieved by the tension of the connecting spring 4 itself.

[0062] Therefore, the foot pedal mechanism provided in this embodiment has a critical value for both unfolding and folding actions, and only one force needs to be applied to reach the critical value to complete the unfolding and folding of the foot pedal mechanism. Based on actual scenario analysis, when moving from the retracted state to the unfolded state, manual rotation is required to reach the critical value. After reaching the critical value, the applied force can be withdrawn, and the foot pedal mechanism can automatically complete the fully unfolding action; the reverse is also effective.

[0063] Therefore, the foot pedal structure of this application, through the design of the folding mechanism, can not only increase the leg support length, but also has the advantages of easy operation and quick response. Example 2

[0064] This embodiment provides a sofa frame based on the footrest structure of Embodiment 1, as shown in the attached diagram. Figure 1 As shown, the frame is generally equipped with a drive component for connecting to the foot pedal structure. The drive component can be implemented by purchasing existing equipment or by referring to publicly available technologies, so it will not be described in detail in this embodiment.

[0065] Based on the analysis of actual scenarios, when moving from the retracted state to the extended state, manual rotation is required to reach a critical value. Once the critical value is reached, the applied force can be withdrawn, and the foot pedal mechanism can automatically complete the fully extended action. Conversely, when moving from the extended state to the retracted state, the drive component drives the entire foot pedal structure to rotate and retract. The foot pedal structure gradually becomes perpendicular to the ground. The extended second connecting piece 3 first contacts the ground, and pressure is generated between the two. This pressure can replace manual force. As the pressure increases, the second connecting piece 3 rotates relative to the first connecting piece 2 and reaches a critical value, quickly reaching the retracted state.

[0066] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A foot pedal structure, comprising a fixed frame (11) and an extended frame (12), wherein the fixed frame (11) and the extended frame (12) are connected by a folding mechanism; characterized in that: The folding mechanism includes a first connector (2), a second connector (3), and a connecting spring (4); The first connector (2) includes a first fixing plate (21), a first connecting plate (22) disposed on the first fixing plate (21), a first connecting hole (23) disposed on the end of the first connecting plate (22) away from the first fixing plate (21), and a first fixing point (24) disposed on the first fixing plate (21). The second connector (3) includes a second fixing plate (31), a second connecting plate (32) disposed on the second fixing plate (31), a second connecting hole (33) disposed on the end of the second connecting plate (32) away from the second fixing plate (31), and a second fixing point (34) disposed on the second fixing plate (31). The first connecting hole (23) and the second connecting hole (33) are connected by connecting bolts (5), and the included angle α between the first connecting plate (22) and the second connecting plate (32) is in the range of 50°~300°; The two ends of the connecting spring (4) are respectively connected to the first fixed point (24) and the second fixed point (34).

2. A footrest structure according to claim 1, wherein: When the included angle α is at its minimum value, the distance between the first fixed point (24) and the second fixed point (34) is L1, and when the included angle α is at its maximum value, the distance between the first fixed point (24) and the second fixed point (34) is L2, and L1≥L2.

3. A footrest structure according to claim 1, wherein: When the included angle α is at its minimum value, the connecting spring (4) is in its original state or in a stretched state; when the included angle α is at its maximum value, the connecting spring (4) is in its original state.

4. A footrest structure according to claim 3, wherein: The second connector (3) also includes an abutment protrusion (35) disposed on the second connecting plate (32); when the included angle α is at its minimum value, the abutment protrusion (35) abuts against the side of the first connecting plate (22).

5. A footrest structure according to claim 4, wherein: When the abutting protrusion (35) abuts against the side of the first connecting plate (22), the angle β between the extension line of the first fixing plate (21) and the extension line of the second fixing plate (31) is in the range of 160°~200°.

6. The footrest structure of claim 1, wherein: The first fixing plate (21) is provided with a first mounting hole (25), and the second fixing plate (31) is provided with a second mounting hole (36).

7. The footrest structure of claim 1, wherein: The first fixing point (24) and the second fixing point (34) both include a fixing rod (341) and a limiting block (342) provided on the end of the fixing rod (341); the two ends of the connecting spring (4) are respectively provided with two arc-shaped hooks (41); the outer diameter of the fixing rod (341) is less than the inner diameter of the arc-shaped hook (41), and the outer diameter of the arc-shaped hook (41) is less than the minimum length of the limiting block (342).

8. The footrest structure of claim 1, wherein: The first fixing plate (21) and the first connecting plate (22) are connected by a first transition portion (26); the second fixing plate (31) and the second connecting plate (32) are connected by a second transition portion (37).

9. A sofa frame comprising a footrest structure as described in any one of claims 1 to 8.

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