A resilient chair seat structure and a chair

Abstract

This utility model discloses a rebound seat structure and a seat. The utility model relates to an adjustable seat (A47C7 / 34); a seat that can tilt, slide, or move back and forth. The rebound seat structure includes a seat frame, on which a rebound component is slidably disposed. Under the action of an external force, the rebound component moves relative to the seat frame. During the movement, the projection of the rebound component on the surface of the seat frame gradually decreases from a maximum projection area to a minimum projection area. When the external force equals the rebound force of the rebound component, the rebound component and the seat frame are relatively stationary, and at this time, the projection of the rebound component on the surface of the seat frame is the stationary projection area. This utility model achieves adaptive deformation of the seat cushion through the coordinated action of the rebound component, the sliding component, and the return spring, adapting to different weights and sitting postures.

Description

Technical Field

[0001] This utility model relates to an adjustable chair seat (A47C7 / 34); a chair seat that can tilt, slide, or move back and forth, specifically a spring-loaded chair seat structure and seat. Background Technology

[0002] In the field of seat design, seat depth adjustment is of great significance for improving user comfort. Various seat depth adjustment solutions have been developed in the existing technology.

[0003] Publication number: CN 219645365 U, patent title: "A Chair Seat Forward and Backward Adjustment Mechanism and Seat", describes a mechanical adjustment mechanism that achieves multi-position fixed adjustment through the cooperation of a seat support rod, an adjustment lever, and a position hole. This technical solution adopts a rigid locking mechanism, which can provide stable seat depth adjustment function and is suitable for usage scenarios that require fixed position support.

[0004] As users demand higher levels of seat comfort, the market is creating new needs for more dynamically adaptable seat depth adjustment solutions. While static position locking, achieved through discrete adjustment holes, is reliable, it suffers from limitations such as discontinuous adjustment and the need for manual intervention. Users must actively pull the adjustment lever to change the seat depth, failing to achieve automatic adaptive adjustment during use. Designing a seat structure with a dynamic adjustment method that better adapts to changes in pressure distribution under different sitting postures and provides a more natural support experience is a pressing issue. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a spring-loaded chair seat structure, which solves the problems of discontinuous adjustment of fixed positions through discrete stop holes and the need for manual intervention. This achieves a dynamic adjustment method that can better adapt to changes in pressure distribution under different sitting postures.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a rebound chair seat structure, including a chair seat frame, on which a rebound component is slidably disposed, and the rebound component moves radially along the chair seat frame under the action of an external force; during the movement, the projection of the rebound component on the surface of the chair seat frame gradually decreases from the maximum projection area to the minimum projection area.

[0007] When the external force is equal to the rebound force of the rebound component, the rebound component is relatively stationary with respect to the seat frame. At this time, the projection of the rebound component on the surface of the seat frame is the stationary projection area.

[0008] When the external force is removed, the rebound component rebounds, and the projection of the rebound component onto the surface of the seat frame is the maximum projected area.

[0009] Preferably, the chair frame includes a backrest end and a sliding seat end disposed opposite to each other, a support rib is formed between the backrest end and the sliding seat end, and at least one pair of slide rail assemblies are provided on the support rib to limit the radial movement stroke of the rebound assembly.

[0010] Preferably, the rebound assembly includes:

[0011] A connecting plate is slidably disposed on the seat frame, and the connecting plate slidably extends out of or overlaps the sliding end of the seat frame;

[0012] The second connecting ring is located on the lower surface of the connecting plate and is movably connected to the slide rail assembly via a sliding bolt.

[0013] Preferably, the rebound assembly further includes:

[0014] The return spring is connected at one end to the connecting plate and at the other end to the surface of the chair frame. When the connecting plate moves radially back and forth relative to the surface of the chair frame, the return spring is stretched or returns to its natural state.

[0015] Preferably, it further includes an elastic element, and the slide assembly includes:

[0016] An insert groove is provided on the surface of the support rib;

[0017] The annular slide rail and socket are located within the mounting groove.

[0018] The second connecting ring is axially fixed to the annular slide rail by a sliding bolt, and slides radially back and forth along the annular slide rail.

[0019] Preferably, the cushion also includes an elastic element and a seat cushion body, wherein the seat cushion body is connected to a second support member via a first support member, and a first breathable area is formed between the seat cushion body and the first support member; a second breathable area is formed between the first support member and the second support member.

[0020] Preferably, the lower edge of the second support member extends towards the connecting plate to form a flange, and the flange and the second support member partially surround to form a pressing area. A buffer spring is provided in the pressing area. When the connecting plate protrudes from the sliding end of the chair frame, it is compressed by force, causing the side of the second support member 3 near the sliding end to rotate down clockwise by 0°-7°.

[0021] Preferably, the lower surface of the seat cushion body is provided with several recesses to buffer air pressure and increase comfort.

[0022] To address the aforementioned problems, the present invention also provides a seat, including the aforementioned spring-loaded seat structure.

[0023] Beneficial effects

[0024] This utility model provides a rebound chair seat structure. It has the following advantages: the slide assembly of the rebound component and the return spring work together to achieve adaptive deformation of the seat cushion, adapting to different weights and sitting postures, as detailed below:

[0025] First, the rebound assembly is connected to the slide rail assembly (annular slide rail) of the seat frame via a sliding bolt, allowing it to slide radially; the connecting plate is fixed to the sliding bolt via a second connecting ring, enabling overall sliding.

[0026] Secondly, the backrest end and the sliding seat end are connected by support ribs, and the support ribs are fitted with slide rail components (fitting grooves + annular slide rails) to limit the sliding stroke of the rebound component; the support ribs enhance the overall strength of the frame, and the slide rail components precisely guide the movement of the rebound component to avoid deflection; the annular slide rail limits the stroke with sliding bolts to prevent excessive sliding from causing parts to fall off or be damaged.

[0027] Third, a second connecting ring is fixed to the lower surface of the connecting plate and is axially fixed to the annular slide rail by a sliding bolt to achieve radial sliding; the cooperation between the second connecting ring and the sliding bolt ensures smooth sliding of the connecting plate and reduces friction noise;

[0028] Fourth, the two ends of the return spring are connected to the connecting plate and the surface of the chair frame, respectively, and slide and extend with the connecting plate; the spring's restoring force drives the rebound component to return to its original position, eliminating the need for manual adjustment; the spring absorbs the impact force when the sitting posture changes, improving comfort;

[0029] Fifth, the annular slide rail is embedded in the mounting groove of the support rib to form a detachable slide; this facilitates the maintenance or replacement of the slide rail, reduces maintenance costs, and ensures that the sliding path is fixed, preventing the spring-loaded components from shifting.

[0030] Sixth, the seat cushion body is connected to the first support member and the second support member to form a double-layer breathable zone (first breathable zone + second breathable zone); the double-layer breathable zone promotes air circulation and reduces the stuffiness caused by sitting for a long time; the first support member provides flexible cushioning, and the second support member enhances rigid support, balancing comfort and load-bearing capacity.

[0031] Seventh, the lower flange of the second support member forms a pressure zone with the connecting plate, and a built-in buffer spring is installed; when the connecting plate protrudes, the spring is compressed, causing the second support member to flip down 0°-7°; the flip angle adapts to the pressure of the buttocks, providing natural and close support for the waist; the buffer spring absorbs the downward pressure, avoiding damage to the frame from hard impacts. Attached Figure Description

[0032] Figure 1This is an exploded view of the spring-loaded chair seat structure described in this utility model;

[0033] Figure 2 An exploded view of the assembly of the second support member and the connecting plate according to this utility model;

[0034] Figure 3 for Figure 2 A cross-sectional view of surface AA;

[0035] Figure 4 An exploded view of the assembly of the chair seat frame and connecting plate according to this utility model;

[0036] In the figure: 1. Seat cushion body; 2. First support member; 3. Second support member; 4. Connecting plate; 401. First connecting ring; 403. Second connecting ring; 5. Seat frame; 501. Circular slide rail; 502. Embedding groove; 6. Buffer spring; 7. Sliding bolt; 8. Return spring; 9. Fastening bolt. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Current technological status: Mechanical adjustment mechanism, which achieves multi-position fixed adjustment through the cooperation of seat support rod, adjustment lever and stop hole. It adopts a rigid locking mechanism to provide stable seat depth adjustment, suitable for usage scenarios requiring fixed position support; the adjustment process requires manual operation by the user.

[0039] In view of this, the present invention provides a rebound chair seat structure. The core technical feature is that the seat depth can be adaptively adjusted by the slide assembly and the return spring 8 to adapt to different weights and sitting postures.

[0040] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly introduced below.

[0041] Example 1, by Figures 1 to 4As can be seen, the rebound chair structure in this case includes a chair frame 5, on which a rebound component is slidably disposed. Under the action of an external force, the rebound component moves radially along the chair frame 5. During the movement, the projection of the rebound component on the surface of the chair frame 5 gradually decreases from the maximum projection area to the minimum projection area. When the external force is equal to the rebound force of the rebound component, the rebound component and the chair frame 5 are relatively stationary, and at this time, the projection of the rebound component on the surface of the chair frame 5 is the stationary projection area. When the external force is removed, the rebound component rebounds, and the projection of the rebound component on the surface of the chair frame 5 is the maximum projection area. It should be further noted that the chair frame 5 is made of high-strength alloy and the rebound component can be made of composite materials. The chair frame 5 adopts a U-shaped design, and the side wall has a wedge-shaped structure that gradually widens at 10° to provide installation space for the rebound component.

[0042] Furthermore, the chair frame 5 includes a backrest end and a sliding seat end arranged opposite to each other, with five support ribs forming between the backrest end and the sliding seat end. It should be further noted that the slide assembly includes an annular slide rail 501 and a mounting groove 502. Two mounting grooves 502 are opened on the outermost support rib, and an annular slide rail 501 is inserted into each mounting groove 502. The axial direction of the annular slide rail 501 is perpendicular to the sliding direction of the connecting plate 4. The annular slide rail 501 is used to limit the radial movement stroke of the rebound assembly. The annular slide rail 501 is socketed in the mounting groove 502. The second connecting ring 403 is axially fixed to the annular slide rail 501 by a sliding bolt 7 and slides radially back and forth along the annular slide rail 501.

[0043] Preferably, the rebound assembly includes: a connecting plate 4, which is slidably disposed on the seat frame 5, and the connecting plate 4 slides out or overlaps above the sliding end of the seat frame 5; and a second connecting ring 403, which is disposed on the lower surface of the connecting plate 4 and is movably connected to the slide rail assembly through a sliding bolt 7. It should be further noted that the two ends of the sliding bolt 7 are engaged on the inner rings of a pair of second connecting rings 403, and the width between the pair of second connecting rings 403 is slightly larger than the width of the annular slide rail 501, so that the sliding bolt 7 limits the second connecting rings 403 to move only radially along the annular slide rail 501, and maintains the relative stability between the vertical annular slide rail 501 and the connecting plate 4 connecting the pair of second connecting rings 403.

[0044] Preferably, the rebound assembly further includes: a return spring 8, one end of which is connected to the connecting plate 4, and the other end of which is connected to the surface of the seat frame 5. When the connecting plate 4 moves radially back and forth relative to the surface of the seat frame 5, the return spring 8 stretches or returns to its natural state; the mounting groove 502 of the slide rail assembly is provided on the surface of the support rib; the annular slide rail 501 is socketed in the mounting groove 502; the second connecting ring 403 of the slide rail assembly is axially fixed to the annular slide rail 501 by a sliding bolt 7, and slides radially back and forth along the annular slide rail 501. It should be further noted that the connecting plate 4 and the seat frame 5, which are respectively connected at both ends of the return spring 8, form a certain angle with the plane on which the seat is placed. When the connecting plate 4 and the seat frame 5 are fully projected and stacked, it is the initial state. When the connecting plate 4 and the seat frame 5 partially overlap, it is a self-adjusting relatively stable state.

[0045] As the return spring 8 is gradually stretched, the connecting plate 4 and the chair frame 5 gradually move from a state of full projection stacking to a state of partial overlapping projection.

[0046] When the length of movement of the connecting plate 4 relative to the seat frame 5 is equal to the maximum stroke of the sliding bolt 7 in the annular slide rail 501, it is the maximum adjustment distance for adaptive adjustment.

[0047] When the tension on the return spring 8 is less than the restoring force generated by the spring's own elastic coefficient, the connecting plate 4 and the chair frame 5 gradually move from a partially overlapping projection to a fully projected stacked state.

[0048] When the tension on the return spring 8 is released, the connecting plate 4 and the seat frame 5 return to their initial state of full projection stacking.

[0049] Preferably, the seat cushion body 1 is connected to the second support member 3 through the first support member 2, and a first breathable area is formed between the seat cushion body 1 and the first support member 2; a second breathable area is formed between the first support member 2 and the second support member 3. The double-layer breathable area promotes air circulation and reduces the stuffiness caused by sitting for a long time; the first support member 2 provides flexible cushioning, and the second support member 3 enhances rigid support, balancing comfort and load-bearing capacity.

[0050] Preferably, the lower edge of the second support member 3 extends towards the connecting plate 3 to form a flange. The flange and the second support member 3 partially surround each other to form a pressure area. A buffer spring 6 is provided in the pressure area. When the connecting plate 4 protrudes from the sliding end of the chair frame 5, it is compressed by force, causing the side of the second support member 3 near the sliding end to fold down clockwise by 0°-7°, with a 5° fold down being the optimal adaptation angle. The folding angle adapts to the pressure of the buttocks and provides natural support for the waist. The buffer spring 6 absorbs the downward pressure and avoids damage to the frame from hard impacts.

[0051] Preferably, the lower surface of the seat cushion body 1 is provided with several recesses, which reduces costs without affecting the sitting feel, has a stabilizing function, buffers air pressure, and increases comfort.

[0052] The specific working principle is as follows:

[0053] When the user is in a seated position, the buttocks exert downward pressure on the seat cushion body 1, the first support member 2, the second support member 3 and the connecting plate 4 in sequence due to the user's weight. During this process, the user uses the strength of the buttocks and legs to move horizontally away from the seat with the feet as the fulcrum. When the buttocks and the seat cushion body 1 are squeezed against each other and friction is generated due to the different materials of the contact surfaces, a pulling force opposite to the friction is generated, thereby providing power F for the relative movement between the connecting plate 4 and the seat frame 5.

[0054] When the force F is greater than the restoring force generated by the spring constant of the return spring, the connecting plate 4 and the seat frame 5 gradually move from a state of full projection stacking to a state of partial overlapping projection.

[0055] When the force F equals the restoring force generated by the spring constant, the connecting plate 4 and the seat frame 5 are relatively stationary, thus achieving adaptive adjustment;

[0056] As the power F gradually decreases and eventually returns to zero, the tension on the return spring 8 is released, and the connecting plate 4 and the seat frame 5 return to their initial state of full projection stacking.

[0057] When the lower flange of the second support member 3 forms a downward pressure area with the connecting plate 4, a built-in buffer spring 6 is installed. When the connecting plate 4 protrudes, the spring is compressed, causing the second support member 3 to tilt downward within a range of 0°-7°, with a 5° tilt being the most comfortable. The tilt angle adapts to the pressure on the buttocks, providing natural support for the waist. The buffer spring 6 absorbs the downward pressure, preventing damage to the frame from hard impacts.

[0058] Example 2

[0059] A seat, including the spring-loaded seat structure of embodiment 1.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spring-loaded chair seat structure, comprising a seat frame (5), characterized in that, A rebound component is slidably disposed on the seat frame (5). Under the action of external force, the rebound component moves relative to the seat frame (5). During the movement, the projection of the rebound component on the surface of the seat frame (5) gradually decreases from the maximum projection area to the minimum projection area. When the external force is equal to the rebound force of the rebound component, the rebound component is relatively stationary with respect to the seat frame (5). At this time, the projection of the rebound component on the surface of the seat frame (5) is the stationary projection area.

2. The spring-loaded chair seat structure according to claim 1, characterized in that: The chair frame (5) includes a backrest end and a sliding seat end arranged opposite to each other. A support rib is formed between the backrest end and the sliding seat end. At least one pair of slide rail assemblies are provided on the support rib to limit the radial movement stroke of the rebound assembly.

3. The spring-loaded chair seat structure according to claim 2, characterized in that: The rebound assembly includes: A connecting plate (4) is slidably disposed on the seat frame (5), and the connecting plate (4) is slidably extended out or stacked on the sliding end of the seat frame (5); The second connecting ring (403) is located on the lower surface of the connecting plate (4) and is movably connected to the slide rail assembly via a sliding bolt (7).

4. The spring-loaded chair seat structure according to claim 3, characterized in that: The rebound assembly also includes: The return spring (8) is connected at one end to the connecting plate (4) and at the other end to the surface of the seat frame (5). When the connecting plate (4) moves radially back and forth relative to the surface of the seat frame (5), the return spring (8) is stretched or returns to its natural state.

5. The spring-loaded chair seat structure according to claim 3, characterized in that: The slide rail assembly includes: An insert groove (502) is provided on the surface of the support rib; The annular slide rail (501) is socketed within the mounting groove (502). The second connecting ring (403) is axially fixed to the annular slide rail (501) by a sliding bolt (7) and slides radially back and forth along the annular slide rail (501).

6. The spring-loaded chair seat structure according to claim 3, characterized in that: It also includes a seat cushion body (1), which is connected to a second support member (3) via a first support member (2). A first ventilation zone is formed between the seat cushion body (1) and the first support member (2); a second ventilation zone is formed between the first support member (2) and the second support member (3).

7. A spring-loaded chair seat structure according to claim 6, characterized in that: The lower edge of the second support member (3) extends toward the connecting plate (4) to form a flange. The flange and the second support member (3) partially surround each other to form a pressing area. A buffer spring (6) is provided in the pressing area. When the connecting plate (4) protrudes from the sliding end of the chair frame (5), it is compressed by force, causing the side of the second support member (3) near the sliding end to rotate down 0°-7° clockwise.

8. A spring-loaded chair seat structure according to claim 6, characterized in that: The lower surface of the cushion body (1) is provided with several recesses to buffer air pressure.

9. A type of seat, characterized in that, Includes the spring-loaded chair seat structure as described in any one of claims 1-8.

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