A foldable seat

Abstract

The application discloses a foldable seat, which comprises a support beam and a seat back support body; the seat back support body is of an integrated structure and comprises seat side rods respectively arranged on two sides; the support beam is hingedly connected with the seat side rods on two sides; a rotating shaft is arranged on one of the support beam and the seat side rods, and a shaft hole is correspondingly arranged on the other one of the support beam and the seat side rods; a locking switch is movably arranged on the support beam; a pressing part is correspondingly arranged on the seat side rod, and the pressing part comprises a sink groove arranged in the inner side surface of the seat side rod; the locking switch is of an L-shaped structure and can be deflected and adjusted in the horizontal direction; the locking switch has a locking position and an unlocking position; when the locking position is adopted, the locking switch is pressed against the sink groove to limit the seat back support body from rotating forward around the support beam; when the unlocking position is adopted, the locking switch is offset relative to the seat side rod to be separated from the sink groove, and the seat back support body can be rotated and folded relative to the support beam.

Description

Technical Field

[0001] This invention relates to the field of seating, and more particularly to a foldable chair. Background Technology

[0002] Existing simple meeting chairs or lounge chairs have a relatively simple structure, offering almost no other function besides providing seating. To save space when not in use, some lounge chairs are designed to fold, making them easy to store and fold; however, current folding chairs on the market are either too rudimentary in structure, seemingly designed for temporary use, making it immediately apparent to users that the chair is designed specifically for folding, thus overlooking its quality; or they are too bulky and lack simplicity, offering limited space savings when folded.

[0003] For example, CN200410071733.0 discloses a "folding structure for a folding chair," which includes a first folding support frame and a second folding support frame. The first folding support frame includes a first front chair leg, a first rear chair leg, and a seat assembly. The upper end of the first front chair leg and the front side end of the seat assembly are rotatably connected. The middle part of the first front chair leg and the lower middle part of the first rear chair leg are rotatably connected in a cross configuration. The seat assembly is slidably and rotatably connected to approximately the middle of the first rear chair leg. Furthermore, when the connection between the seat assembly and the first rear chair leg slides to the front end of the first horizontal support rod, the seat assembly, the first front chair leg, and the first rear chair leg are on the same plane. The structure of the second folding support frame is the same as that of the first folding support frame. Although this folding chair's folding structure can be folded, its folding mechanism is clearly concentrated at the chair legs, making it easily visible to the naked eye. Moreover, users usually need to use both hands to operate it when folding, making the folding operation relatively strenuous. In addition, the cross structure design of the chair legs is specifically designed for folding, clearly distinguishing it from ordinary chairs, and making the space under the seat less streamlined.

[0004] To address the above issues, a simple and easily foldable seat needs to be designed, while also ensuring that the seat structure is simple and aesthetically pleasing. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a foldable seat. By simply controlling the locking switch to switch between the locked and unlocked positions, the seat back support can be folded quickly, making the operation very simple. Moreover, the folding structure is concentrated only between the seat back support and the support beam, making the overall structure of the seat very simple and beautiful.

[0006] The technical solution of this invention is implemented as follows:

[0007] A foldable seat includes: a support beam and a seat back support; the seat back support is an integral structure, including seat side rods located on both sides; both sides of the support beam are hinged to the seat side rods, and a pivot is provided on one of the support beam and the seat side rod, and a corresponding pivot hole is provided on the other of the support beam and the seat side rod; a locking switch is movably disposed on the support beam; a pressing part is provided on the seat side rod, the pressing part including a recessed groove on the inner side of the seat side rod; the locking switch has an L-shaped structure and can be deflected and adjusted in the horizontal direction; the locking switch has a locked position and an unlocked position. In the locked position, the locking switch is pressed against the recessed groove to restrict the seat back support from rotating forward around the support beam; in the unlocked position, the locking switch is offset relative to the seat side rod to disengage from the recessed groove, and the seat back support can rotate and fold relative to the support beam.

[0008] Preferably, the recessed groove is positioned at the middle height of the seat side rod in the vertical direction; and the top of the locking switch is lower than the top of the seat side rod. The seat back support is used to connect the mesh fabric, so that the locking switch and the recessed groove will not interfere with the mesh fabric.

[0009] Preferably, the seat back support is configured to connect to a support mesh fabric, and the support mesh fabric is formed on the top of the seat side rod. The support mesh fabric then covers the locking switch and the recess, resulting in a very simple and aesthetically pleasing overall seat structure.

[0010] Preferably, the locking switch includes a longitudinal rotating link and a horizontal limiting rod located at the upper end of the rotating link; a hollowed-out movable slot is provided on the supporting crossbeam, and the bottom end of the rotating link is vertically inserted into the movable slot; in the locked position, the limiting rod abuts against the recess to restrict the rotation of the seat back support; in the unlocked position, the rotating link moves along the movable slot to cause the limiting rod to deviate from the seat side rod. Controlling the deflection of the locking switch achieves the rotation locking and unlocking of the seat back support, and the adjustment method is simple.

[0011] Preferably, the bottom of the supporting beam is provided with a drive adjustment mechanism that can control the movement of the rotating linkage within the movable slot. This drive adjustment mechanism includes an adjustment trigger protruding from the bottom end of the supporting beam. Applying the adjustment trigger allows for reciprocating movement to switch the locking switch between the locked and unlocked positions. The user then only needs to apply the adjustment trigger, making adjustment very convenient.

[0012] Preferably, the drive adjustment mechanism includes a main drive component that slides along the front-to-back direction at the bottom of the support beam and pull rods mirror-imagely disposed on the left and right sides of the main drive component; the adjustment trigger is located at the middle position of the main drive component; a guide mechanism is provided between one end of the pull rod and the main drive component, the guide mechanism including a guide groove obliquely disposed on the side of the pull rod and a guide post correspondingly disposed on the main drive component and passing through the guide groove; the guide mechanism is configured such that when the main drive component moves back and forth relative to the support beam, the pull rod moves left and right relative to the support beam; a rotating seat is rotatably connected to the bottom of the support beam at the bottom of the rotating connecting rod, and the other end of the pull rod is connected to the rotating seat. Then, when the main drive component drives the pull rod to move horizontally relative to the support beam, it will cause the rotating seat to rotate relative to the support beam, thereby causing the rotating connecting rod to move within the movable slot, causing the limiting pressure rod to deviate.

[0013] Preferably, the drive adjustment mechanism also includes a horizontally arranged return spring, one end of which is connected to the pull rod; a connecting protrusion is also provided at the bottom end of the support beam, and the other end of the return spring is connected to the connecting protrusion. Therefore, when the locking switch moves to the unlock position, the return spring is stretched and deformed accordingly, thereby providing an elastic force to reset the locking switch.

[0014] Preferably, a decorative bottom cover for covering the drive adjustment mechanism is provided at the bottom end of the support beam; the decorative bottom cover has a clearance notch for exposing the adjustment trigger.

[0015] Preferably, the rotating shaft is located at the front end of both sides of the supporting crossbeam, and the shaft hole is correspondingly located on the inner side of the seat side rod; and the locking switch is located behind the rotating shaft.

[0016] Preferably, a rotation limiting mechanism is provided between the rotating shaft and the seat side rod. The rotation limiting mechanism includes a limiting tangent on the rotating shaft and a corresponding limiting post in the shaft hole. The rotation limiting mechanism is configured to allow the seat back support to rotate forward around the support crossbar and stop at a folded position where the limiting post and the limiting tangent abut against each other.

[0017] Preferably, the limiting post is a screw rod detachably connected to the seat side rod, and the length of the screw rod is adjustable. Using a screw rod simplifies the connection structure; and by changing the length of the screw rod, the maximum forward tilt angle of the seat back support when folded can be altered.

[0018] Preferably, the limiting cut surface is inclined at the upper front end of the rotating shaft; a connecting hole communicating with the shaft hole is provided on the side rod of the seat, and the screw passes through the connecting hole from top to bottom, with the bottom end of the screw passing above the shaft hole. By utilizing the cooperation between the screw and the limiting cut surface of the rotating shaft, the seat back support can be stably maintained in the folded position.

[0019] The design starting point, concept, and beneficial effects of the present invention, which adopts the above technical solution, are as follows:

[0020] The foldable seat of this invention features a seat back support that rotates with a support beam, with a rotation limiting mechanism between them. The limiting surface on the rotating shaft and the limiting post within the shaft hole ensure the seat back support remains stably folded relative to the support beam in a forward-rotating position. The folding structure is simple and reliable, making folding operation quick and easy. Furthermore, a locking switch on the support beam allows for rapid locking and unlocking of the seat back support simply by controlling the switch to switch between locked and unlocked positions. The overall design is ingenious, resulting in a clean and aesthetically pleasing seat structure.

[0021] Secondly, the locking switch and recess are located between the inner side of the support beam and the seat side rod, and the locking switch does not extend beyond the top of the seat side rod; then, when the support mesh is connected to the seat back support, the locking switch and recess will be hidden under the support mesh, thus enhancing the appearance of the seat.

[0022] In this case, the deflection adjustment of the locking switch is controlled by a drive adjustment mechanism located at the bottom of the support beam; this allows the user to control the state of the locking switch simply by operating the adjustment trigger to extend or retract, making the adjustment simple and mechanical. Attached Figure Description

[0023] Figure 1 This is a side view of the lounge chair in a seated position in an embodiment of the present invention;

[0024] Figure 2 This is a side view of the lounge chair in the folded position in an embodiment of the present invention;

[0025] Figure 3 This is a three-dimensional structural diagram of the lounge chair in an embodiment of the present invention;

[0026] Figure 4 This is a three-dimensional structural diagram of the locking switch in the locked position of the present invention, showing the cooperation between the seat back support and the support beam.

[0027] Figure 5 This is a three-dimensional structural diagram of the cooperation between the seat back support and the support beam in an embodiment of the present invention;

[0028] Figure 6 This is a three-dimensional structural diagram of the rotating shaft and screw in the seated position of the present invention in an embodiment;

[0029] Figure 7 This is a three-dimensional structural diagram of the present invention in which the screw abuts against the limiting tangential surface in the folded position in an embodiment;

[0030] Figure 8 This is a side view of the locking switch abutting against the sink in an embodiment of the present invention;

[0031] Figure 9 This is a three-dimensional structural diagram of the locking switch in the unlocked position of the present invention, showing the cooperation between the seat back support and the support beam.

[0032] Figure 10 This is a three-dimensional structural diagram of the drive adjustment mechanism connected to the bottom of the support beam in an embodiment of the present invention;

[0033] Figure 11 This is a three-dimensional structural diagram of the locking switch driving the adjustment mechanism in the locked position in an embodiment of the present invention;

[0034] Figure 12 This is a three-dimensional structural diagram of the locking switch driving adjustment mechanism in the unlocked position in an embodiment of the present invention;

[0035] Figure 13 This is a three-dimensional structural diagram of the drive adjustment mechanism cooperating with the bottom end of the support beam in an embodiment of the present invention;

[0036] Figure 14 This is a three-dimensional structural diagram of the bottom end of the supporting beam in an embodiment of the present invention;

[0037] Figure 15 This is a three-dimensional structural diagram of the seat back support body connected to the support mesh in an embodiment of the present invention.

[0038] The attached figures are labeled as follows: 1. Support beam; 2. Seat back support; 3. Seat side rod; 4. Rotating shaft; 5. Shaft hole; 6. Limiting cut surface; 7. Screw; 8. Locking switch; 801. Rotating connecting rod; 802. Limiting pressure rod; 9. Slot; 10. Moving slot; 11. Rotating seat; 12. Main drive component; 13. Adjusting trigger; 14. Pull rod; 15. Guide groove; 16. Guide post; 17. Decorative bottom cover; 18. Return spring; 19. Connecting protrusion; A. Chair leg; B. Support mesh fabric. Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0041] In the description of this invention, the term "at least one" means one or more, unless otherwise expressly defined. The terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] The specific embodiments of the present invention are as follows:

[0043] like Figure 1-7 As shown, the present invention provides a foldable seat, including a horizontal support beam 1 and a seat back support 2 rotatably connected to the support beam 1; wherein, the seat back support 2 is an integral structure, and the seat back support 2 includes seat side rods 3 located on the left and right sides respectively; the seat side rods 3 are hinged to the support beam 1, so that the seat back support 2 can rotate and fold around the support beam 1; thus, the seat back support 2 has the following characteristics: Figure 1 The sitting position shown, and as Figure 2 The folded position shown is the one where the beam rotates forward around the support beam 1.

[0044] Specifically: such as Figure 3-7 As shown, rotating shafts 4 are respectively provided at the front ends of both sides of the supporting beam 1, and correspondingly, shaft holes 5 are provided at the inner ends of the seat side rods 3; the rotating shafts 4 are rotatably inserted into the shaft holes 5, thereby enabling the seat back support body 2 to rotate stably around the supporting beam 1; and as Figure 6 As shown, a rotation limiting mechanism is provided between the rotating shaft 4 and the seat side rod 3. This rotation limiting mechanism includes a limiting cut surface 6 on the rotating shaft 4 and a corresponding limiting post in the shaft hole 5. The limiting cut surface 6 is inclined at the upper front end of the rotating shaft 4. The limiting post is a screw 7 detachably connected to the seat side rod 3. The seat side rod 3 has a longitudinally penetrating connecting hole in the shaft hole 5, allowing the screw 7 to pass through the seat side rod 3 from top to bottom, with the bottom end of the screw 7 just partially passing above the shaft hole 5. Then, as... Figure 6-7 As shown, when the seat back support 2 rotates forward from the sitting position, the screw 7 will follow the movement of the seat side rod 3 until the bottom end of the screw 7 abuts against the limiting cut surface 6 of the rotating shaft 4 to limit further rotation of the seat back support 2. During this process, the forward tilt angle of the seat back support 2 is between 35° and 50°, and under the action of gravity, the seat back support 2 can stably stay in the folded position. Then, by directly utilizing the cooperation between the screw 7 and the limiting cut surface 6 of the rotating shaft 4, the seat back support 2 can be stably maintained in the folded position, and the structure is simple and reliable. Furthermore, the length of the screw 7 is adjustable, so by changing the length of the screw 7, the maximum forward tilt angle of the seat back support 2 when folded can be specifically changed.

[0045] like Figure 3-5As shown in Figures 8-14, an adjustable locking switch 8 is also provided on the supporting crossbeam 1. The locking switch 8 has an L-shaped structure and includes a longitudinal rotating connecting rod 801 and a limiting pressure rod 802 located horizontally at the upper end of the rotating connecting rod 801. A pressing part is provided at the corresponding position of the seat side rod 3. The pressing part includes a recessed groove 9 on the seat side rod 3. The limiting pressure rod 802 can abut against the recessed groove 9, so that the limiting pressure rod 802 and the seat side rod 3 abut against each other vertically. At this time, it can restrict the seat back support 2 from rotating forward around the supporting crossbeam 1, so that the seat back support 2 can be stably maintained in the normal sitting position.

[0046] The supporting crossbeam 1 has a hollowed-out movable slot 10, and the bottom end of the rotating connecting rod 801 is vertically inserted into the movable slot 10. The bottom end of the supporting crossbeam 1 also has a drive adjustment mechanism that allows the rotating connecting rod 801 to move within the movable slot 10. By controlling this drive adjustment mechanism to move the rotating connecting rod 801, the locking switch 8 deflects horizontally. Thus, the locking switch 8 has a locking position where the limiting pressure rod 802 abuts against the recess 9, and an unlocking position where the limiting pressure rod 802 disengages from the seat side rod 3. Specifically: For example... Figure 9-14 As shown, a rotating seat 11 is rotatably connected to the bottom end of the supporting beam at the bottom end of the rotating connecting rod 801; the driving adjustment mechanism includes a main driving member 12 slidably disposed at the bottom end of the supporting beam 1 in the front-back direction and pull rods 14 mirror-displayed on the left and right sides of the main driving member 12. An adjustment trigger 13 is provided at the middle position of the main driving member 12, which directly drives the main driving member 12 to move back and forth along the supporting beam 1 by actuating the adjustment trigger 13; a guide mechanism is provided between one end of the pull rod 14 and the main driving member 12, the guide mechanism including a guide groove 15 obliquely disposed on the side of the pull rod 14 and a guide post 16 correspondingly disposed on the main driving member 12 and passing through the guide groove 15; the guide mechanism is configured such that when the main driving member 12 moves back and forth relative to the supporting beam 1, the pull rod 14 can move left and right relative to the supporting beam 1; and the other end of the pull rod 14 is connected to the rotating seat 11. Subsequently, when the pull rod 14 moves horizontally relative to the supporting beam 1, it will cause the rotating seat 11 to rotate relative to the supporting beam 1, thereby causing the rotating connecting rod 801 to move within the movable slot 10, causing the limiting pressure rod 802 to deviate. And as... Figure 9 As shown, after the drive adjustment mechanism is assembled with the bottom end of the support beam 1, a decorative bottom cover 17 is further connected to the bottom end of the support beam 1. The decorative bottom cover 17 is provided with a clearance notch to expose the adjustment trigger 13, so that only the adjustment trigger 13 is exposed. Therefore, the user only needs to directly move the adjustment trigger 13 back and forth to control the deflection movement of the locking switch 8.

[0047] like Figure 3 , 9As shown in Figure -13, when the user directly applies the adjustment trigger 13 at the bottom of the support beam 1 to move backward, it will drive the rotating connecting rod 801 to move within the movable slot 10, thereby causing the limiting pressure rod 802 to deflect to the unlocked position away from the seat side rod 3. This allows the seat back support 1 to then rotate forward around the support beam 1 to the folded position. Furthermore, the drive adjustment mechanism also includes a return spring 18. One end of the return spring 18 is connected to the pull rod 14, and a connecting protrusion 19 is provided at the bottom of the support beam 1. The other end of the return spring 18 is connected to this connecting protrusion 19. Therefore, when the locking switch 8 moves to the unlocked position, the return spring 18 stretches and deforms accordingly, providing the elastic force to reset the locking switch 8. This allows the adjustment trigger 13 to automatically reset after the user releases it, causing the locking switch 8 to automatically reset to the locked position. This makes the operation of resetting the seat from the folded state very simple and quick.

[0048] And such as Figure 1-2 As shown in Figures 8, 9, and 15, and along the vertical direction, the recessed groove 9 is located at the middle height of the seat side rod 3; and the top of the locking switch 8 is lower than the top of the seat side rod 3. When the seat is finally formed, a support mesh fabric B is also connected to the seat back support 2, and the support mesh fabric B is formed at the top of the seat side rod; subsequently, the support mesh fabric B can cover the locking switch 8 and the recessed groove 9, further enhancing the appearance of the seat. During adjustment, the locking switch 8 only deflects horizontally, thus avoiding interference with the mesh fabric. Furthermore, the locking switch 8, the recessed groove 9, the rotating shaft 4, and the shaft hole 5 are concentrated between the seat back support 2 and the support beam 1, making the overall structure of the seat very simple and aesthetically pleasing; thus, there is no need to place the folding and locking structure on the seat leg A, allowing this folding structure to be widely used in most seats.

[0049] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A foldable seat, characterized in that The utility model relates to a backrest support structure of a seat, comprising: a support beam and a backrest support body; the backrest support body is an integral structure, and the backrest support body comprises seat side rods respectively located on two sides; the two sides of the support beam are respectively hinged with the seat side rods, a rotating shaft is arranged on one of the support beam and the seat side rod, and a shaft hole is correspondingly arranged on the other one of the support beam and the seat side rod; a locking switch is movably arranged on the support beam; a pressing part is correspondingly arranged on the seat side rod, the pressing part comprises a groove arranged on the inner side of the seat side rod; the locking switch has an L-shaped structure and can be adjusted in the horizontal direction; the locking switch comprises a rotating connecting rod in the longitudinal direction and a limiting pressing rod arranged horizontally on the upper end of the rotating connecting rod; the support beam is provided with a hollow movable slot, and the bottom end of the rotating connecting rod is vertically arranged in the movable slot; the locking switch has a locking position and an unlocking position; in the locking position, the limiting pressing rod abuts against the groove to limit the rotation of the backrest support body around the support beam; in the unlocking position, the rotating connecting rod moves along the movable slot to make the limiting pressing rod deviate from the seat side rod and be separated from the groove, so that the backrest support body can be rotated and folded relative to the support beam.

2. The foldable seat of claim 1, wherein: In the vertical direction, the groove is arranged at the middle height of the seat side rod, and the top end of the locking switch is lower than the top end of the seat side rod.

3. A foldable seat according to claim 1 or 2, characterised in that: The backrest support body is configured to be connected with a support net, and the support net is formed on the top of the seat side rod.

4. The foldable seat of claim 1, wherein: The bottom of the support beam is provided with a driving adjusting mechanism capable of controlling the movement of the rotating connecting rod in the movable slot, the driving adjusting mechanism comprises an adjusting trigger exposed on the bottom end of the support beam, and the adjusting trigger is retracted and extended forward and backward to switch the locking switch between the locking position and the unlocking position.

5. The foldable seat of claim 4, wherein: The driving adjusting mechanism comprises a main driving part slidably arranged on the bottom end of the support beam in the front-back direction and a pull rod mirror-symmetrically arranged on the left and right sides of the main driving part; the adjusting trigger is arranged at the middle position of the main driving part; a guide mechanism is arranged between one end of the pull rod and the main driving part, the guide mechanism comprises a guide groove obliquely arranged on the side of the pull rod and a guide column correspondingly arranged on the main driving part and arranged in the guide groove; the guide mechanism is configured to move the pull rod left and right relative to the support beam while the main driving part moves forward and backward relative to the support beam; the bottom end of the rotating connecting rod is provided with a rotating seat rotatably connected to the bottom of the support beam, and the other end of the pull rod is connected to the rotating seat.

6. The foldable seat of claim 5, wherein: The driving adjusting mechanism further comprises a transversely arranged reset spring, one end of the reset spring is connected to the pull rod, and the other end of the reset spring is connected to a connecting protrusion arranged on the bottom end of the support beam.

7. The foldable seat of claim 5, wherein: A decorative bottom cover is further arranged on the bottom end of the support beam to cover the driving adjusting mechanism; the decorative bottom cover is provided with an avoiding gap for exposing the adjusting trigger.

8. The foldable seat of claim 1, wherein: The rotating shaft is arranged at the front end of the two sides of the support beam, the shaft hole is correspondingly arranged on the inner side of the seat side rod, and the locking switch is located behind the rotating shaft.

9. The foldable seat of claim 8, wherein: A rotating limiting mechanism is arranged between the rotating shaft and the seat side rod, the rotating limiting mechanism comprises a limiting surface arranged on the rotating shaft and a limiting column correspondingly arranged in the shaft hole; the rotating limiting mechanism is configured to make the backrest support body have a folding position in which the backrest support body is rotated forward around the support beam and stops when the limiting column abuts against the limiting surface.

10. The foldable seat of claim 9, wherein: The limiting column is a screw rod which is detachably connected with the seat side rod, and the length of the screw rod is configured to be adjustable.

11. The foldable seat of claim 10, wherein: The limiting section is obliquely arranged at the front upper end of the rotating shaft; the seat side rod is provided with a connecting hole which is in communication with the shaft hole, and the screw rod is arranged in the connecting hole from top to bottom, and the bottom end of the screw rod is arranged above the shaft hole.

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