Folding seat with limiting hinge

Abstract

The utility model discloses a turnover seat with a limiting hinge. The turnover seat comprises a basic supporting framework, a suspension movable framework, a turnover cushion framework, the limiting hinge, an adjusting mechanism, a high-low driving telescopic cylinder and a turnover driving telescopic cylinder. Large-angle overturning of the cushion is achieved through the limiting hinge and the overturning cushion framework, the using area of the seat can be effectively increased when the cushion is unfolded, the structure is compact and does not occupy space when the cushion is folded, and meanwhile the height and angle of the cushion are adjusted through matched use of the basic supporting framework, the suspension movable framework and the adjusting mechanism. The device can adapt to different use scenes and user requirements, is simple in structural design, has high use convenience, and can guarantee the stability in the adjustment process.

Description

Technical Field

[0001] This utility model relates to the field of folding seat technology, and in particular to a folding seat with a limiting hinge. Background Technology

[0002] Folding seats, with their portability and space-saving features, have been widely used in various settings such as homes, offices, public places, and vehicle interiors.

[0003] Currently, foldable chair designs on the market typically consist of a seat cushion, a backrest, and a folding mechanism. The seat cushion is fixed to a support structure, usually using a metal or plastic frame for stability. The backrest is mounted on top of the seat cushion, and the connection between the backrest and the seat cushion relies on the folding mechanism to achieve the seat's folding function. Current folding mechanisms mainly fall into the following types: central axis type, where the two ends of the seat are connected by a central axis, allowing the seat cushion and backrest to fold around this axis; side hinge type, where hinges are installed on both sides of the seat, allowing the seat cushion and backrest to fold along these hinges; and pull-out type, where the seat cushion and backrest are folded by pulling out to save space.

[0004] However, existing folding seats have certain technical limitations in their design, mainly in that the angle of the seat cushion is usually fixed and cannot be adjusted according to the user's personal preferences or needs. This design flaw limits the comfort and adaptability of the seat. Summary of the Invention

[0005] To address the aforementioned technical problems, this utility model provides a folding seat with a limiting hinge. To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simple form as a prelude to the detailed description that follows.

[0006] The present invention adopts the following technical solution:

[0007] A folding seat with a limiting hinge is provided, comprising: a basic support frame, a suspended movable frame, and a flip-up seat cushion frame connected to the suspended movable frame via the limiting hinge; the rear suspension beam of the suspended movable frame is hinged to the basic support frame, and the front suspension beam of the suspended movable frame is connected to the front side member of the basic support frame via an adjustment mechanism; the adjustment mechanism includes: a bottom hinge plate, a connecting rod, and a stepped drive rod; the bottom hinge plate is disposed on the front side member of the basic support frame; both ends of the connecting rod are respectively hinged to the middle part of the drive rod and the bottom hinge plate; and both ends of the drive rod are respectively hinged to the front suspension beam of the suspended movable frame and a height-lowering telescopic cylinder.

[0008] Furthermore, the drive rod includes: a first crossbar, the rear end of which bends downward to form a transition rod, and the bottom end of the transition rod extends rearward to form a second crossbar.

[0009] Furthermore, the top of the front end of the bottom hinge plate extends upward to form a support plate, one end of the connecting rod is hinged to the support plate, and the other end of the connecting rod is hinged to the transition rod.

[0010] Furthermore, the adjustment mechanism also includes: a top hinge plate and an assembly drive shaft; the top hinge plate is disposed on the front suspension beam of the suspended movable frame, and a mounting plate is disposed on the top hinge plate below the front suspension beam of the suspended movable frame; the front end of the first crossbar is hinged to the mounting plate, the rear end of the second crossbar is hinged to the assembly drive shaft, and the assembly drive shaft is connected to the high and low drive telescopic cylinder.

[0011] Furthermore, a hinge seat is provided on the rear rod of the basic support frame, the fixed end of the high-low drive telescopic cylinder is hinged to the hinge seat, and the movable end of the high-low drive telescopic cylinder is hinged to the assembly drive shaft.

[0012] Furthermore, side support plates are provided on both sides of the basic support frame, and the rear suspension beam of the suspended movable frame is hinged to the side support plates.

[0013] Furthermore, the limiting hinge includes: a fixed side hinge plate, a flip side hinge plate, an active hinge rod, a driven hinge rod, and a drive shaft; the fixed side hinge plate is connected to the front suspension beam of the suspended movable frame, and the flip side hinge plate is connected to the flip seat cushion frame.

[0014] Furthermore, the folding seat with a limiting hinge further includes: a flip-drive telescopic cylinder; an elongated oval guide groove is provided on the fixed side hinge plate; one end of the active hinge rod is hinged to the drive shaft rod, and the end of the drive shaft rod is embedded in the elongated oval guide groove; the other end of the active hinge rod is hinged to the flip-side hinge plate; the middle part of the active hinge rod is hinged to the middle part of the driven hinge rod; and the flip-drive telescopic cylinder is hinged to the drive shaft rod.

[0015] The beneficial effects of this utility model are as follows: the seat cushion can be flipped at a large angle by using the limiting hinge and the flipping seat cushion frame. When opened, it can effectively increase the usable area of ​​the seat. When folded, the structure is compact and does not take up space. At the same time, through the combined use of the basic support frame, the floating movable frame and the adjustment mechanism, the height and angle of the seat cushion can be adjusted to adapt to different usage scenarios and user needs. Moreover, the structural design of this application is simple and has high ease of use, while also ensuring stability during the adjustment process. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of a folding seat with a limiting hinge according to this utility model, taken from one angle.

[0018] Figure 2 This is a perspective view of a folding seat with a limiting hinge according to this utility model from another angle;

[0019] Figure 3 This is a top view of a folding seat with a limiting hinge according to this utility model;

[0020] Figure 4 This is a bottom view of a folding seat with a limiting hinge according to this utility model;

[0021] Figure 5 This is a schematic diagram of the adjustment structure of this utility model from one perspective;

[0022] Figure 6 This is a schematic diagram of the adjustment structure of this utility model from another perspective;

[0023] Figure 7 This is a schematic diagram showing the position of the adjustment structure and the hinge seat of this utility model;

[0024] Figure 8 This is a schematic diagram of the limiting hinge of this utility model;

[0025] Figure 9 This is a side view of the limiting hinge of this utility model when it is fully open;

[0026] Figure 10 This is a side view of the limiting hinge of this utility model when fully folded.

[0027] Figure 11 This is a schematic diagram showing the positions of the fixed side hinge plate, the flip side hinge plate, the active hinge rod, and the driven hinge rod of this utility model.

[0028] Figure 12 This is a schematic diagram showing the connection between the fixed side hinge plate, the flip side hinge plate, the active hinge rod, the driven hinge rod, and the frame of this utility model. Detailed Implementation

[0029] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] like Figure 1-12 As shown, in some illustrative embodiments, a folding seat with a limiting hinge is provided, including: a basic support frame 1, a suspended movable frame 2, a flip-up seat cushion frame 4, a limiting hinge 6, an adjustment mechanism 7, a height-low drive telescopic cylinder 8, and a flip-up drive telescopic cylinder 9.

[0031] The basic support frame 1 is used to provide stable support for the seat and to connect and fix it to other structures. It is generally installed at a fixed location, or it can be installed at the place of use through a guide rail system to enable the overall forward and backward movement of the folding seat, thereby increasing the flexibility of use.

[0032] The suspended movable frame 2 is used to realize the flexible adjustment function of the seat cushion. It is located above the base support frame 1 and supports one part of the seat cushion. The flip seat cushion frame 4 supports the other part of the seat cushion. The rear suspension beam 21 of the suspended movable frame is hinged to the base support frame 1. Specifically, side support plates 11 are set on both sides of the base support frame 1, and the rear suspension beam 21 of the suspended movable frame is hinged to the side support plates 11. The hinge point here is the fixed support point for the adjustment of the suspended movable frame 2.

[0033] The front suspension beam 22 of the suspended movable frame is connected to the front rod 12 of the base support frame via an adjustment mechanism 7, which is driven by a height-low drive telescopic cylinder 8. During the extension and retraction process, the height-low drive telescopic cylinder 8 drives the adjustment mechanism 7 to change its state, thereby adjusting the height of the front suspension beam 22 of the suspended movable frame, and consequently adjusting the angle between the suspended movable frame 2 and the base support frame 1. This allows users to easily adjust the seat height and the angle between the suspended movable frame 2 and the base support frame 1 (i.e., the seat angle) according to their needs, thus achieving the most suitable sitting posture.

[0034] The adjustment mechanism 7 includes: a top hinge plate 71, a bottom hinge plate 72, a connecting rod 73, a drive rod, and an assembly drive shaft 74.

[0035] The top hinge plate 71 is mounted on the front suspension beam 22 of the suspended movable frame, and a mounting plate 711 is mounted on the top hinge plate 71 below the front suspension beam 22 of the suspended movable frame. In this document, "below" refers to the side closer to the seat mounting plane. The bottom hinge plate 72 is mounted on the front member 12 of the base support frame, and the top of the front end of the bottom hinge plate 72 extends upward to form a support plate 721.

[0036] The drive linkage is stepped; the stepped shape is explained below:

[0037] The drive link includes: a first crossbar 75, the rear end of the first crossbar 75 is bent downward to form a transition bar 76, the bottom end of the transition bar 76 extends rearward to form a second crossbar 77, such that the position of the second crossbar 77 is lower than that of the first crossbar 75, thereby forming a stepped drive link.

[0038] The first crossbar 75, the transition bar 76, and the second crossbar 77 are integrally formed and smoothly connected.

[0039] In the above text, the rear end of the first horizontal bar 75 refers to the end away from the flip seat frame 4, and the bottom end of the transition bar 76 extends backward in the direction away from the flip seat frame 4.

[0040] The two ends of the connecting rod 73 are respectively hinged to the middle part of the driving rod and the bottom hinge plate 72. Specifically, the hinge of the connecting rod 73 to the middle part of the driving rod means that it is hinged to the transition rod 76, and the hinge of the connecting rod 73 to the bottom hinge plate 72 means that it is hinged to the support plate 721.

[0041] Both ends of the drive rod are hinged to the front suspension beam 22 of the suspended movable frame and the high-low drive telescopic cylinder 8, respectively. Specifically, the front end of the first crossbar 75 is hinged to the mounting plate 711, and the rear end of the second crossbar 77 is hinged to the assembly drive shaft 74. The assembly drive shaft 74 is connected to the high-low drive telescopic cylinder 8.

[0042] The connecting rod 73 is hinged to the support plate 721 and the transition rod 76 by opening circular holes at corresponding positions on the connecting rod 73, the support plate 721 and the transition rod 76, and passing a cylindrical shaft through the circular holes. Similarly, the first crossbar 75 is hinged to the mounting plate 711 by opening holes at corresponding locations and passing a rotating shaft through them. The rear end of the second crossbar 77 has a circular hole, and the end of the assembly drive shaft 74 is inserted into the circular hole on the second crossbar 77. At the same time, the shaft of the assembly drive shaft 74 passes through the hole on the movable end of the high-low drive telescopic cylinder 8.

[0043] A hinge seat 14 is provided on the rear rod 13 of the basic support frame. The fixed end of the height-low drive telescopic cylinder 8 is hinged to the hinge seat 14, and the movable end of the height-low drive telescopic cylinder 8 is hinged to the assembly drive shaft 74. When the height-low drive telescopic cylinder 8 extends or retracts, it drives the assembly drive shaft 74 to move, which in turn causes the drive rod to swing under the limitation of the top hinge plate 71 and the connecting rod 73. At the same time, the connecting rod 73 swings under the limitation of the bottom hinge plate 72, thereby realizing the state change of the adjustment mechanism 7 under the drive of the height-low drive telescopic cylinder 8, and finally realizing the height adjustment of the front suspension beam 22 of the suspended movable frame, thereby realizing the angle adjustment between the suspended movable frame 2 and the basic support frame 1. This allows for the adjustment of the seat height and angle, which can adapt to different usage scenarios and user needs. Moreover, the structural design of this application is simple, has high ease of use, and can also ensure stability during the adjustment process.

[0044] The suspended movable frame 2 is connected to the flip-up seat cushion frame 4 via the limiting hinge 6.

[0045] The limiting hinge 6 includes: a fixed side hinge plate 100, a flip side hinge plate 200, an active hinge rod 300, a driven hinge rod 400, a drive shaft rod 500, a flip side shaft rod 600, a fixed side shaft rod 700, an end shaft rod 800, and a middle support shaft rod 900.

[0046] An elongated oval guide groove 110 is provided on the fixed side hinge plate 100, which provides guidance and support for the movement of the drive shaft 500. The drive shaft 500 is connected to the fixed side hinge plate 100 through the elongated oval guide groove 110 and is hinged to the tilting drive telescopic cylinder 9 to achieve its own translation. When the drive shaft 500 moves, it works in conjunction with the active hinge rod 300 and the driven hinge rod 400 to achieve the tilting action of the tilting side hinge plate 200.

[0047] The flip-side hinge plate 200 and the fixed-side hinge plate 100 form a pair, together constituting the flip-end portions of the limiting hinge 6. Both the fixed-side hinge plate 100 and the flip-side hinge plate 200 are provided with mounting grooves 120. The fixed-side hinge plate 100 is connected to the front suspension beam 22 of the suspended movable frame, that is, the front suspension beam 22 of the suspended movable frame is welded into the mounting groove 120; the flip-side hinge plate 200 is connected to the flip-side seat cushion frame 4, that is, the flip-side seat cushion frame 4 is welded into the mounting groove 120 provided on the flip-side hinge plate 200.

[0048] When the fixed side hinge 100 and the flip side hinge 200 are respectively mounted on the suspended movable frame 2 and the flip seat cushion frame 4, and when the flip side hinge 200 and the fixed side hinge 100 are fully folded, the two parts of the frame overlap to achieve the seat function. At this time, the usable area is small, suitable for driving or sitting. Similarly, when the flip side hinge 200 and the fixed side hinge 100 are fully opened, the two parts of the frame are on the same plane. At this time, the usable area is larger, which can provide more legroom or serve as a surface for temporary rest.

[0049] Both the active hinge 300 and the driven hinge 400 are arc-shaped hinges.

[0050] The active hinge 300 is the active driving part of the limiting hinge 6. One end of the active hinge 300 is hinged to the drive shaft 500, and the other end is hinged to the flipping side hinge plate 200, thereby realizing the transmission of driving force and thus realizing the flipping action of the flipping side hinge plate 200. The driven hinge 400 is the driven flipping part of the limiting hinge 6. Both ends of the driven hinge 400 are hinged to the fixed side hinge plate 100 and the end shaft 800, respectively.

[0051] The hinge connection between the active hinge rod 300 and the drive shaft 500 is as follows:

[0052] One end of the active hinge rod 300 has a first through hole 310, and the rod body of the drive shaft 500 passes through the first through hole 310, so that the active hinge rod 300 can rotate around the drive shaft 500, and the end of the drive shaft 500 is embedded in the elongated guide groove 110 opened on the fixed side hinge plate 100.

[0053] The hinge connection between the active hinge rod 300 and the flip-side hinge plate 200 is as follows:

[0054] The two ends of the flip side shaft 600 are respectively connected to two flip side hinge plates 200; the other end of the active hinge rod 300 is provided with a second through hole 320, and the rod body of the flip side shaft 600 passes through the second through hole 320, so that the active hinge rod 300 can rotate around the flip side shaft 600.

[0055] The hinge connection between the driven hinge 400 and the fixed hinge plate 100 is as follows:

[0056] The two ends of the fixed side shaft 700 are respectively connected to two fixed side hinge plates 100. One end of the driven hinge rod 400 is provided with a first circular groove 410. The rod body of the fixed side shaft 700 passes through the first circular groove 410, so that the driven hinge rod 400 can rotate around the fixed side shaft 700.

[0057] The hinge connection between the driven hinge 400 and the end shaft 800 is as follows:

[0058] A second circular groove 420 is opened at the other end of the driven hinge rod 400, and the rod body of the end shaft 800 passes through the second circular groove 420, so that the driven hinge rod 400 can rotate around the end shaft 800. A track groove 210 is opened on the inner side of the flip side hinge plate 200, and the end of the end shaft 800 is embedded in the track groove 210, so that the end shaft 800 can move along the opening direction of the track groove 210.

[0059] The middle portion of the active hinge rod 300 is hinged to the middle portion of the driven hinge rod 400. Specifically, both the middle portions of the active hinge rod 300 and the driven hinge rod 400 have through slots 340, and the shaft of the central support shaft 900 passes through the through slots 340, allowing both the active hinge rod 300 and the driven hinge rod 400 to rotate around the central support shaft 900.

[0060] When the flipping drive telescopic cylinder 9 acts on the drive shaft 500, when the flipping drive telescopic cylinder 9 extends, it pushes the drive shaft 500 to move along the elongated guide groove 110 towards the flipping side hinge plate 200. The position design of the hinge point between the active hinge rod 300 and the driven hinge rod 400 causes the active hinge rod 300 and the driven hinge rod 400 to flip accordingly, ultimately driving the flipping side hinge plate 200 to flip. When the drive shaft 500 reaches the other end of the elongated guide groove 110, the flipping side hinge plate 200 flips 180° and reaches a fully folded state.

[0061] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A folding seat with a limiting hinge, characterized in that, include: A basic support frame, a suspended movable frame, and a flip-up seat cushion frame connected to the suspended movable frame via a limiting hinge; The rear suspension beam of the suspended movable frame is hinged to the basic support frame, and the front suspension beam of the suspended movable frame is connected to the front rod of the basic support frame through an adjustment mechanism. The adjustment mechanism includes a bottom hinge plate, a connecting rod, and a stepped drive rod. The bottom hinge plate is disposed on the front rod of the foundation support frame. The two ends of the connecting rod are respectively hinged to the middle part of the drive rod and the bottom hinge plate. The two ends of the drive rod are respectively hinged to the front suspension beam and the high-low drive telescopic cylinder of the suspended movable frame.

2. A folding seat with a limiting hinge according to claim 1, characterized in that, The drive link includes: a first crossbar, the rear end of which bends downward to form a transition bar, and the bottom end of the transition bar extends rearward to form a second crossbar.

3. A folding seat with a limiting hinge according to claim 2, characterized in that, The top of the front end of the bottom hinge plate extends upward to form a support plate, one end of the connecting rod is hinged to the support plate, and the other end of the connecting rod is hinged to the transition rod.

4. A folding seat with a limiting hinge according to claim 3, characterized in that, The adjustment mechanism further includes a top hinge plate and an assembly drive shaft; the top hinge plate is disposed on the front suspension beam of the suspended movable frame, and a mounting plate is disposed on the top hinge plate below the front suspension beam of the suspended movable frame; the front end of the first crossbar is hinged to the mounting plate, the rear end of the second crossbar is hinged to the assembly drive shaft, and the assembly drive shaft is connected to the high and low drive telescopic cylinder.

5. A folding seat with a limiting hinge according to claim 4, characterized in that, A hinge seat is provided on the rear rod of the basic support frame. The fixed end of the high-low drive telescopic cylinder is hinged to the hinge seat, and the movable end of the high-low drive telescopic cylinder is hinged to the assembly drive shaft.

6. A folding seat with a limiting hinge according to claim 5, characterized in that, Side support plates are provided on both sides of the basic support frame, and the rear suspension beam of the suspended movable frame is hinged to the side support plates.

7. A folding seat with a limiting hinge according to claim 6, characterized in that, The limiting hinge includes: a fixed side hinge plate, a flip side hinge plate, an active hinge rod, a driven hinge rod, and a drive shaft; the fixed side hinge plate is connected to the front suspension beam of the suspended movable frame, and the flip side hinge plate is connected to the flip seat cushion frame.

8. A folding seat with a limiting hinge according to claim 7, characterized in that, Also includes: Tilting-driven telescopic cylinder; An elongated oval guide groove is provided on the fixed side hinge plate. One end of the active hinge rod is hinged to the drive shaft rod, and the end of the drive shaft rod is embedded in the elongated oval guide groove. The other end of the active hinge rod is hinged to the flip side hinge plate. The middle part of the active hinge rod is hinged to the middle part of the driven hinge rod. The tilting drive telescopic cylinder is hinged to the drive shaft.

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