A reclining chair

Abstract

The invention discloses a reclining chair, comprising: a crossbeam assembly, comprising a front crossbeam and a rear crossbeam butted together at the front and rear, the front crossbeam being rotatably connected to the rear crossbeam, and an elastic rotation mechanism being provided between the front crossbeam and the rear crossbeam, the elastic rotation mechanism comprising a spring steel bar, which is configured to enable the front crossbeam to elastically rotate around the rear crossbeam; a seat back supporting body, which is a frame structure; the seat back supporting body comprising seat side bars respectively located on the left and right sides of the crossbeam assembly, the seat side bars being rotatably connected to the front crossbeam; a limiting guide structure, comprising a limiting guide groove recessed on the seat side bars and a limiting pressure rod correspondingly arranged on the rear crossbeam and pressed against the limiting guide groove; the front crossbeam rotates backward around the rear crossbeam to drive the seat back supporting body to recline, the seat back supporting body moves backward and the front end is tilted at the same time; during the reclining movement of the seat back supporting body, the limiting pressure rod will move along the limiting guide groove and act on the seat back supporting body to adaptively rotate relative to the front crossbeam.

Description

Technical Field

[0001] The present invention relates to the field of seating, in particular to a reclining chair. Background Art

[0002] There are various chair structures on the market. Among them, reclining chairs are chairs with adjustable backrest and seat angles. They are favored by more and more consumers for their comfortable posture. The reclining action of existing common reclining chairs mainly relies on a tray at the bottom of the seat, and the backrest and seat are respectively linked to the tray; the seat-back linkage function is achieved through the deformation of the tray.

[0003] However, these chairs, which are typically equipped with trays, are often high-end and expensive to manufacture. Due to cost constraints, not all chairs have a tray structure. Even if some chairs have a tray, the tray's function is only to adjust the seat height and does not allow for backrest reclining. Furthermore, due to cost constraints, most simple chairs have backrests directly connected to the seat, lacking a tray structure. Consequently, a common problem with current chairs is that, while chairs with chassis structures can achieve reclining, they are expensive and complex. Furthermore, even simple chairs with very simple structures struggle to achieve reclining.

[0004] In view of the above problems, the present invention designs a chair with simple structure, low cost and tilt adjustment function. Summary of the Invention

[0005] The object of the present invention is to overcome the deficiencies in the above-mentioned prior art and to provide a reclining chair; by designing the crossbeam assembly as a front crossbeam and a rear crossbeam that are connected by rotation back and forth, and the front crossbeam is also connected by rotation to the side rods of the seat; and then by the cooperation between the front crossbeam, the rear crossbeam and the seat back support body, the reclining function of the chair is realized; there is no need to equip a tray structure, so that the overall structure of the chair is very simple and beautiful.

[0006] The technical solution of the present invention is achieved as follows:

[0007] The foldable chair is constructed of wood and has a plurality of resilient members, each of which is adapted to move relative to the front crossbeam when the foldable chair is in a state of being easily retracted. The foldable chair is constructed of wood and has a plurality of resilient members, each of which is adapted to move relative to the front crossbeam when the foldable chair is in a state of being easily retracted.

[0008] Preferably, the rearward movement of the seat back support causes the limiting pressure rod to move forward along the limiting guide groove, and the limiting pressure rod simultaneously applies a downward force to the seat side rod, so that the seat back support body will simultaneously adaptively rotate relative to the front crossbeam, thereby preventing the seat back support body from rotating too much and preventing the seat back support body from tilting up sharply.

[0009] Preferably, the side cross-section of the position limiting guide groove is in an arc shape, which can match the motion trajectory of the seat back support body, so that the position limiting pressure rod can always move along the position limiting guide groove.

[0010] Preferably, a rotating shaft is provided on the left and right sides of the front cross beam respectively, and the rotating shaft is spaced front and rear from the rear cross beam; and an axial hole is provided on the side rod of the seat portion for rotating with the rotating shaft.

[0011] Preferably, the spring steel bar is arranged horizontally, and a clamping limit seat is provided at the middle position inside the rear crossbeam, and the center of the spring steel bar is clamped in the clamping limit seat; the front crossbeam is provided with a rotating clamp, and the rear crossbeam is correspondingly provided with a rotating groove, and the two ends of the spring steel bar are respectively exposed in the rotating groove; the rotating clamp rotates in the rotating groove to enable the front crossbeam to rotate back and forth around the rear crossbeam; and the rotating clamp is configured to clamp and cooperate with the spring steel bar at the same time, and the front crossbeam rotates around the rear crossbeam to drive the spring steel bar to undergo elastic torsional deformation, and the spring steel bar is deformed and provides elastic force for the front crossbeam to return to its original position after rotation.

[0012] Preferably, the rear crossbeam has an interior space for accommodating a spring steel bar, and the engaging stopper is disposed in the middle of the space. The engaging stopper has a notch for engaging with the spring steel bar, and the spring steel bar engages within the notch. This allows the spring steel bar to be fixed in the middle, while the two side portions of the spring steel bar can be torsionally deformed within the space.

[0013] Preferably, a horizontal avoidance groove is provided at the front end of the rear crossbeam, the avoidance groove being connected to the accommodating space; the spring steel bar enters the accommodating space through the avoidance groove and engages with the engaging limit seat, making it easy to install the spring steel bar and the rear crossbeam.

[0014] Preferably, the rotation groove is a circular groove, which is arranged at the side end of the rear cross beam and is connected to the accommodating space, so that the end of the spring steel bar can just be exposed in the rotation groove.

[0015] Preferably, a connection opening is provided at the front end of the side portion of the rear crossbeam, which is in communication with the rotation groove and is smaller than the diameter of the rotation groove. Accordingly, a symmetrical notch is provided on the rotation clamp, which is configured to allow the rotation clamp to enter the rotation groove through the connection opening. This makes the connection between the front and rear crossbeams very quick and convenient, without the need for screws.

[0016] Preferably, the rotating clamp is provided with a snap-fit notch for snapping with the spring steel strip; when the rotating clamp enters the rotating groove from the connection opening, the end of the spring steel strip is snap-fitted into the snap-fit notch, thereby maintaining the end of the spring steel strip circumferentially fixed to the rotating clamp.

[0017] Preferably, both sides of the front crossbeam are provided with rearward-protruding rotation support seats, and the rotation clamp is arranged on the rotation support seats; and the rear crossbeam is correspondingly provided with a mounting slot for accommodating the rotation support seats.

[0018] Preferably, a sliding support structure is further provided between the rear cross beam and the seat side rods, and the sliding support structure includes a slide groove provided at the bottom end of the side rod and rollers correspondingly provided on the rear bracket.

[0019] Preferably, a protruding sliding support is provided at the bottom end of the side rod of the rear bracket, and the roller is arranged on the sliding support. The roller can also support the seat support so that the seat support will not shake.

[0020] The design starting point, concept and beneficial effects of the present invention using the above technical solution are:

[0021] The reclining chair of the present invention is designed to have a crossbeam assembly comprising a front crossbeam and a rear crossbeam that are connected in a forward and backward rotational manner. The front crossbeam is also rotatably connected to the seat side bars. A spring steel bar is provided between the front and rear crossbeams, enabling the front crossbeam to elastically rotate about the rear crossbeam. The front crossbeam then rotates backward about the rear crossbeam to drive the seat back support body to recline. During this reclining process, the seat back support body moves backward and the front end simultaneously tilts up. Because the seat side bars of the seat back support body rotate in coordination with the front crossbeam, a limiting guide structure is provided between the seat side bars and the rear crossbeam. When the seat back support body reclines, the limiting pressure rod moves along the limiting guide groove. During this movement, the limiting pressure rod also applies a downward force to the seat side bars, causing the seat back support body to adaptively rotate relative to the front crossbeam, thereby preventing the seat back support body from rotating excessively and tilting up sharply. The chair's tilt function is achieved through the coordinated relationship between the front and rear crossbeams and the seat back support. The front and rear crossbeams are butted together front to back, ensuring a strong structural integrity. This eliminates the need for a tray structure, resulting in a simple and aesthetically pleasing overall chair structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the three-dimensional structure of a chair in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the connection between the seat back support body and the crossbeam assembly in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the seat back support body, the front crossbeam and the rear crossbeam in the embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the front crossbeam, the rear crossbeam and the lying steel bars in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the spring steel strip fitted into the rear cross member in an embodiment of the present invention;

[0027] Figure 6 A cross-sectional view of the spring steel strip and the clamping limit seat in an embodiment of the present invention;

[0028] Figure 7 Schematic diagram of the three-dimensional structure of the rotating chuck in the embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the three-dimensional structure of the embodiment of the present invention in which the rotating clamp is rotatably engaged in the rotating groove and is clamped with the spring steel strip;

[0030] Figure 9A side view of the limiting pressure rod located at the rear end of the limiting guide groove in an embodiment of the present invention;

[0031] Figure 10 A side view of the limiting pressure rod moving along the limiting guide groove during the reclining process in an embodiment of the present invention;

[0032] Figure 11 A schematic diagram of the three-dimensional structure of the sliding support structure in an embodiment of the present invention;

[0033] Figure 12 A side view of a chair according to an embodiment of the present invention;

[0034] Figure 13 It is a side view of the seat back support body after it is tilted back and rotated in the embodiment of the present invention.

[0035] The figures are marked as follows: seat back support body 1; front crossbeam 2; rotating support seat 201; rotating clamp 2011; rear crossbeam 3; seat side rod 4; mounting slot 5; rotating groove 501; rotating shaft 6; shaft hole 7; limiting guide groove 8; limiting pressure rod 9; sliding support 10; slide groove 11; roller 12; spring steel bar 13; clamping limiting seat 14; accommodating space 15; avoidance groove 16; connecting opening 17; incision 18; clamping slot 19. Implementation Method

[0036] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0038] In the description of the present invention, the term "at least one" refers to one or more than one, unless otherwise clearly defined. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] The specific implementation of the present invention is as follows:

[0040] like Figure 1-13As shown, the present invention provides a reclining chair, comprising a seat back support body 1 and a crossbeam assembly; wherein the crossbeam assembly comprises a front crossbeam 2 and a rear crossbeam 3 connected front and rear; the front crossbeam 2 can rotate forward and backward around the rear crossbeam 3; the seat back support body 1 is a frame structure, and the seat back support body 1 comprises seat side rods 4 located on the left and right sides of the crossbeam assembly, the seat side rods 4 are rotatably matched with the front crossbeam 3, and the backward rotation of the seat back support body 1 drives the front crossbeam 2 to rotate backward around the rear crossbeam 3; and a limiting guide structure is further provided between the rear crossbeam 3 and the seat side rods 4, so that the seat back support body 1 can perform a very stable backward reclining movement.

[0041] like Figure 2-8 As shown, the front crossbeam 2 is provided with a rearward-protruding rotation support seat 201, and a mounting notch 5 is provided at a corresponding position on the rear crossbeam 3. A rotation groove 501 is recessed on the side end of the rear crossbeam 3 located at the mounting notch 5, and a rotation clamp 2011 is provided on the rotation support seat 201. The rotation support seat 201 is embedded in the mounting notch 5, and the rotation clamp 2011 rotates and fits in the rotation groove 501, thereby enabling the front crossbeam 2 to rotate relative to the rear crossbeam 3. The front crossbeam 2 rotates backward around the rear crossbeam 3 to drive the seat back support body 1 to recline. During this reclining process, the seat back support body 1 moves backward and the front end simultaneously tilts up. A rotating shaft 6 is provided at each end of the front crossbeam 2, and the rotating shaft 6 is spaced front and rear from the rear crossbeam 3; a corresponding shaft hole 7 is provided on the inner side surface of the seat side rod 4; the rotating shaft 6 rotates through the shaft hole 7 of the seat side rod 4 on the corresponding side, so that the seat back support body 1 can also rotate relative to the front crossbeam 2.

[0042] like Figure 1-3 As shown in Figures 9-10, the limiting guide structure includes a limiting guide groove 8 recessed on the inner side of the seat side rod 4 and a limiting pressure rod 9 correspondingly arranged on the rear crossbeam 3. The limiting pressure rod 9 is L-shaped, and the bottom end of the limiting pressure rod 9 is connected to the rear crossbeam 3, and the top end of the limiting pressure rod 9 is pressed against the limiting guide groove 8; Figure 9-10 As shown, when the front crossbeam 2 rotates backward around the rear crossbeam 3, causing the seat back support body 1 to tilt backward, the limiting pressure rod 9 will move along the limiting guide groove 8. Furthermore, as the limiting pressure rod 9 moves along the limiting guide groove 8, it also applies a downward force to the seat side rod 4, causing the seat back support body 1 to adaptively rotate relative to the front crossbeam 2. This prevents the seat back support body 1 from rotating too much and from tilting up sharply, thus acting as a rotation limiter. The side cross-section of the limiting guide groove 8 is arc-shaped, and from back to front, the limiting guide groove 8 extends forward and downward; it can match the motion trajectory of the seat back support body 1, allowing the limiting pressure rod 9 to always move along the limiting guide groove 8.

[0043] like Figure 9-13As shown, the seat back support body 1 will move backward at the same time during the reclining process; therefore, a sliding support structure is further provided between the rear cross beam 3 and the seat side rod 4, and the sliding support structure includes a sliding support 10 provided on the rear cross beam 3 at the bottom end of the seat side rod 4, and a slide groove 11 correspondingly provided at the bottom end of the seat side rod 4; a roller 12 is provided on the sliding support 10, and the roller 12 is configured to roll in the slide groove 11; then, as shown Figure 12-13 As shown, during the backward rotation of the seat back support body 1, the roller 12 will roll in the slide groove 11, so that the seat back support body 1 moves smoothly; and the roller 12 can also support the seat back support body 1, so that the seat back support body 1 will not shake.

[0044] like Figure 3-8 As shown, an elastic rotation mechanism is also provided between the front crossbeam 2 and the rear crossbeam 3, and the elastic rotation mechanism includes a spring steel bar 13 horizontally arranged in the rear crossbeam 3, and a clamping limit seat 14 is provided at the middle position inside the rear crossbeam 3, and the center of the spring steel bar 13 is clamped in the clamping limit seat 14; the interior of the rear crossbeam 3 is provided with an accommodating space 15 for accommodating the spring steel bar 13, and the clamping limit seat 14 is arranged at the middle position of the accommodating space 15; the spring steel bar 13 is a rectangular flat body, and the clamping limit seat 14 is provided with a notch for clamping with the spring steel bar 13, and the spring steel bar 13 is clamped in the notch, and the clamping limit seat 14 can limit the up and down movement of the spring steel bar 13. In addition, a horizontal avoidance groove 16 is provided at the front end of the rear crossbeam 3. The avoidance groove 16 is connected to the accommodating space 15, so that the spring steel bar 13 can enter the accommodating space 15 through the avoidance groove 16 and be engaged with the engaging limit seat 14, making installation convenient.

[0045] The rotation groove 501 is a circular groove that connects with the accommodating space 15, allowing both ends of the spring steel bar 13 to be exposed in the rotation groove 501. The assembly structure of the rotation clamp 2011 of the front crossbeam 2 and the rotation groove 501 is as follows: a connecting opening 17 that connects with the rotation groove 501 is provided at the front end of the side of the rear crossbeam 3, and the opening size of the connecting opening 17 is smaller than the diameter of the rotation groove 501. Correspondingly, symmetrical cutouts 18 are provided on the rotation clamp 2011, allowing the rotation clamp 2011 to enter the rotation groove 501 through the connecting opening 17. This makes the connection between the front crossbeam 2 and the rear crossbeam 3 very quick and convenient, without the need for screws. The rotating clamp 2011 is also provided with a clamping groove 19 for clamping with the spring steel bar 13. When the rotating clamp 2011 enters the rotating groove 501 from the connecting opening 17, the clamping groove 19 is in a horizontal state, so that when the rotating clamp 2011 enters the rotating groove 501, the spring steel bar 13 will be clamped in the clamping groove 19; thereby, the end of the spring steel bar 13 will remain circumferentially fixed on the rotating clamp 2011.

[0046] Then, when the front crossbeam 2 rotates around the rear crossbeam 3, the front crossbeam 2 will act on the spring steel bar 13 to undergo elastic torsional deformation in the accommodating space 15. The deformation of the spring steel bar 13 will provide elastic force for the front crossbeam 2 to return to its original position after rotation; thus, the front crossbeam 2 can elastically rotate relative to the rear crossbeam 3. The overall structure is very simple, and the spring steel bar 13 is horizontally arranged in the rear crossbeam 3, which does not occupy too much space inside the rear crossbeam 3, and the layout is reasonable and ingenious. And in the seat, if Figure 1 As shown, the front crossbeam 2 is connected to the seat back support body 1, and the rear crossbeam 3 is connected to the chair legs; the spring steel bar 13 is hidden in the rear crossbeam 3; the overall structure of the seat is simple and beautiful.

[0047] The reclining chair of the present invention realizes the reclining function of the chair through the cooperation between the front crossbeam 2, the rear crossbeam 3 and the seat back support body 1; and does not need to be equipped with a tray structure, making the overall structure of the chair very simple and beautiful.

[0048] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs a structure and embodiment similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A reclining chair, characterized in that: include: The crossbeam assembly comprises a front crossbeam and a rear crossbeam butted together at the front and rear, the front crossbeam being rotatably connected to the rear crossbeam, and an elastic rotating mechanism is provided between the front crossbeam and the rear crossbeam, the elastic rotating mechanism comprising a spring steel bar, which is configured to enable the front crossbeam to elastically rotate around the rear crossbeam; the spring steel bar is horizontally arranged, and a clamping limit seat is provided at a middle position inside the rear crossbeam, and the center of the spring steel bar is clamped in the clamping limit seat; the front crossbeam is provided with a rotating clamp, and the rear crossbeam is correspondingly provided with a rotating groove, and both ends of the spring steel bar are respectively exposed in the rotating groove; the rotating clamp is rotatably engaged in the rotating groove so that the front crossbeam can rotate forward and backward around the rear crossbeam; and the rotating clamp is configured to simultaneously clamp and cooperate with the spring steel bar, and the front crossbeam rotates around the rear beam to drive the spring steel bar to undergo elastic torsional deformation, and the deformation of the spring steel bar provides an elastic force for the front crossbeam to return to its original position after rotation; The seat back support body is a frame structure; the seat back support body includes seat side rods located on the left and right sides of the crossbeam assembly, and the seat side rods are rotatably connected to the front crossbeam; The position limiting guide structure includes a position limiting guide groove recessed on the seat side rod and a position limiting pressure rod correspondingly provided on the rear cross beam and pressed against the position limiting guide groove; The front crossbeam rotates backward around the rear crossbeam to drive the seat back support body to recline, and the seat back support body moves backward and the front end is tilted at the same time; during the reclining movement of the seat back support body, the limiting pressure rod will move along the limiting guide groove and cause the seat back support body to adaptively rotate relative to the front crossbeam.

2. The reclining chair according to claim 1, characterized in that: The seat back supporting body reclines backwards to cause the limiting pressure rod to move forward along the limiting guide groove, and the limiting pressure rod simultaneously applies a downward force to the side rod of the seat portion.

3. The guide support mechanism of a reclining seat according to claim 2, characterized in that: The side cross-section of the limiting guide groove is arc-shaped.

4. The reclining chair according to claim 1, wherein: A rotating shaft is respectively provided on the left and right sides of the front cross beam, and the rotating shaft is spaced front and rear from the rear cross beam; and an axis hole which is rotatably matched with the rotating shaft is correspondingly provided on the side rod of the seat.

5. The reclining chair according to claim 1, wherein: The interior of the rear crossbeam is provided with an accommodating space for accommodating a spring steel bar, and the clamping limit seat is arranged in the middle position of the accommodating space; the clamping limit seat is provided with a notch for clamping with the spring steel bar, and the spring steel bar is clamped in the notch.

6. The reclining chair according to claim 5, characterized in that: A horizontal avoidance groove is provided at the front end of the rear cross beam, and the avoidance groove is connected with the accommodating space; the spring steel bar enters the accommodating space through the avoidance groove and is engaged with the engaging limit seat.

7. The reclining chair according to claim 1, wherein: The rotation groove is a circular groove, which is arranged at the side end of the rear cross beam; and the rotation groove is connected to the accommodating space.

8. The reclining chair according to claim 7, wherein: A connecting opening is provided at the front end of the side portion of the rear cross beam, which is connected to the rotating groove, and the opening size of the connecting opening is smaller than the diameter of the rotating groove; accordingly, a symmetrical incision is provided on the rotating clamp, which is configured to enable the rotating clamp to enter the rotating groove from the connecting opening.

9. The reclining chair according to claim 8, characterized in that: The rotating clamp is provided with a clamping notch for clamping with the spring steel strip; when the rotating clamp enters the rotating groove from the connecting opening, the end of the spring steel strip will be clamped in the clamping notch.

10. The reclining chair according to claim 1, wherein: The two sides of the front crossbeam are respectively provided with a rotation support seat protruding backward, and the rotation clamp is arranged on the rotation support seat; the rear crossbeam is correspondingly provided with a mounting groove for accommodating the rotation support seat.

11. The reclining chair according to claim 1, wherein: A sliding support structure is further provided between the rear cross beam and the seat side rods. The sliding support structure comprises a sliding groove provided at the bottom end of the side rods and rollers correspondingly provided on the rear bracket.

12. The reclining chair according to claim 11, characterized in that: A protruding sliding support is provided on the rear bracket at the bottom end of the side rod, and the roller is arranged on the sliding support.

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