CN106388364A - Backward moving type folding seat - Google Patents

Abstract

The invention discloses a backward moving type folding seat, and belongs to the technical field of seats. The backward moving type folding seat disclosed by the invention comprises a support, seat front legs, seat face supporting blocks, seat back legs, a seat face and a backrest, wherein the support, the seat front legs, the seat back legs and the seat face supporting blocks form a four-connecting-rod mechanism; a dead point mechanism is arranged between the seat front legs and the seat back legs, and the back of the seat face is connected with the dead point mechanism through articulated connecting rods; the seat face is lifted upwards to drive the dead point mechanism to be unlocked through the connecting rods and then to drive the seat front legs and the seat back legs to be inclined and folded backwards; and the seat face is pressed downwards to drive the dead point mechanism to be locked through the connecting rods and then to unfold the seat front legs and the seat back legs at right positions forwards. According to the backward moving type folding seat, the seat face is folded to drive the seat to integrally move backwards by using the four-connecting-rod mechanism, a relatively large space can be maintained after the seat face is folded, and the seat is convenient to enter and exit; and moreover, the seat has folding flexibility and stability, is simple in structure, smart in design, low in cost and high in practical, and is extremely convenient and worthy of popularization and application.

Description

A rear-moving folding seat

technical field

The present invention relates to a folding seat, more specifically, to a reclining folding seat.

Background technique

In today's universities, high school classrooms, and many academic lecture halls and meeting places, most of the tables and chairs of the lecture hall type are used, and generally a classroom or lecture hall can accommodate at least more than one hundred people, or even more. In order to save space, most of the tables and chairs adopt the way of fixed joint seats. This kind of fixed seats are generally folded to achieve the maximum space utilization. It is not difficult to find that the current fixed folding seats can be roughly divided into the following two categories:

One is to manually turn the front end of the seat board upwards and backwards by means of hinge joints to achieve the folded state; the other is to use the force or gravity exerted by the torsion spring to automatically restore the seat board to the folded state to achieve the folding effect. The front end of the seat board is turned upwards and backwards. Although these two types of folding chairs have increased space utilization compared with chairs with a fixed seat board, there is a seemingly normal but serious problem: it is very inconvenient for the audience sitting in the middle to come in and out. Every time you enter and exit, you will disturb the surrounding audience. Sometimes you need the surrounding audience to come out to enter and exit smoothly, and this is not convenient for cleaning. In addition, the process of returning the seat board to the folded state is fast and noisy, which will affect the quietness of the surrounding environment. others.

After searching, the Chinese patent number ZL201420377583.5, the date of authorization announcement is December 3, 2014, and the name of the invention is: humanized folding chair. The seat back column can vacate the space in the middle of the seat. When people pass by, the person sitting in the seat can get up and slide the seat surface to the back of the chair. At the same time, the space in the middle of the seat is convenient for people to pass; the seat surface slides to the back. Also easy to clean. But even so, the best effect cannot be achieved, because when the chair surface is folded to the chair back, the chair legs and the backrest are not moving, and the access space cannot be maximized, and there are still relatively large use limitations, which is not convenient Promotional use.

Therefore, how to design a seat that can move and can reserve a certain space to facilitate everyone's access and practicability has become a technical problem to be solved urgently.

Contents of the invention

1. The technical problem to be solved by the invention

The purpose of the present invention is to overcome the above-mentioned deficiencies existing in the existing fixed folding seats, and provide a rearward-moving folding seat. By adopting the technical solution of the present invention, the seat surface is folded to drive the seat as a whole backwards by using a four-bar linkage mechanism. It can be moved and folded to leave a large space for easy access; and the seat has both flexibility and stability when folded, simple structure, ingenious design, low cost, and strong practicability. It is very convenient and worthy of popularization and application, and can be widely used. In the press conference hall, academic lecture hall and student classrooms, etc.

2. Technical solution

In order to achieve the above object, the technical scheme provided by the invention is:

A rear-moving folding seat of the present invention comprises a support, a seat front leg, a seat rear leg, a seat surface and a backrest, and also includes a seat surface support block, and the rear part of the seat surface is hinged on the seat surface On the support block, the backrest is installed on the seat surface support block, the bottom ends of the front legs of the seat and the rear legs of the seat are hinged on the support, and the top ends of the front legs of the seat and the tops of the seat rear legs are all hinged on the seat surface support block, and the described bearing, the seat front leg, the seat rear leg and the seat surface support block constitute a four-bar linkage; the seat front leg and the seat surface support block A dead point mechanism is provided between the rear legs of the seat, and the back of the seat surface is connected to the dead point mechanism through a hinged connecting rod;

The seat surface is lifted upwards to unlock the dead point mechanism through the connecting rod, and then the front legs and rear legs of the seat are tilted and folded backward; the seat surface is pushed down to lock the dead point mechanism through the connecting rod to lock The front legs of the seat and the rear legs of the seat are placed forward and unfolded.

As a further improvement of the present invention, when the seat surface is depressed to expand the seat, the front legs of the seat and the rear legs of the seat are both in a vertical position.

As a further improvement of the present invention, the length of the rear legs of the seat is slightly longer than the length of the front legs of the seat.

As a further improvement of the present invention, the dead center mechanism includes a first strut and a second strut, one end of the first strut is hinged to the middle of the front leg of the seat, and one end of the second strut The bottom of the rear leg of the seat is hinged, the first strut and the second strut are hinged, and the hinge point of the first strut and the second strut is hinged with one end of the connecting rod.

As a further improvement of the present invention, the lengths of the first strut and the second strut are equal, and when the seat surface is pressed down to expand the seat, the first strut and the second strut are straightened into the same straight line.

As a further improvement of the present invention, the chair surface is hinged to the chair surface support block through the chair surface bracket, and the connecting rod is hinged to the chair surface bracket.

As a further improvement of the present invention, the backrest is hinged to the seat surface support block through the backrest bracket, and the seat surface support block is provided with a limiting groove that cooperates with the backrest support and can limit the rotation angle of the backrest support.

As a further improvement of the present invention, the rotation angle of the backrest bracket in the limiting groove is 10°-20°.

As a further improvement of the present invention, the seat front legs, seat rear legs and seat surface support blocks constitute a seat support unit, and a set of seat support units are provided on both sides of the seat.

As a further improvement of the present invention, the dead point mechanisms between the two sets of seat support units are linked and connected through a central shaft.

3. Beneficial effect

Compared with the existing known technology, the technical solution provided by the invention has the following remarkable effects:

(1) A rear-moving folding seat of the present invention, its support, seat front legs, seat rear legs and seat surface support block constitute a four-bar linkage mechanism, between the seat front legs and the seat rear legs There is a dead point mechanism, and the back of the seat surface is connected with the dead point mechanism through a hinged connecting rod; when the seat surface is lifted up, the connecting rod drives the dead point mechanism to unlock, and then drives the front legs of the seat and the rear legs of the seat to tilt and fold backward; Facing down, the dead point mechanism is driven by the connecting rod to lock, and then the front leg and the rear leg of the seat are straightened forward; the four-bar linkage mechanism is used to fold the seat surface to drive the seat to move backward. After folding, it can Leave a large space for easy access; and the seat folding flexibility and stability, simple structure, ingenious design, strong practicability, low cost, very convenient and worthy of promotion and application, can be widely used in press conference halls, Academic lecture halls and student classrooms, etc.;

(2) A rear-moving folding seat of the present invention, when the seat surface is pressed down to expand the seat, the front legs of the seat and the rear legs of the seat are in a vertical position, which not only has good structural stability, but also can Improve the bearing capacity of the seat to meet the needs of people of different weights;

(3) A kind of rear-moving folding seat of the present invention, the length of its rear leg is slightly greater than the length of the front leg of the seat, like this, after the seat is folded, the front leg of the seat can have a larger inclination angle, Therefore, it can ensure that a larger space is vacated after the seat is folded, and the seat surface support block can drive the backrest to tilt forward after folding, so that the seat is folded more compactly, which is convenient for the space arrangement of the seat and the rear table, and makes full use of the space ;

(4) A kind of rear-moving folding seat of the present invention, its dead point mechanism comprises a first strut and a second strut, one end of the first strut is hinged with the middle part of the front leg of the seat, and the second strut One end is hinged with the bottom of the back leg of the seat, the first strut and the second strut are hinged, and the hinge point of the first strut and the second strut is hinged with one end of the connecting rod; the dead point mechanism is simple in structure, flexible and reliable , good stability, the whole seat is driven by the seat surface to fold or unfold, and the switch is flexible and free;

(5) In the rear-moving folding seat of the present invention, the lengths of the first strut and the second strut are equal, and when the seat surface is pressed down to expand the seat, the first strut and the second strut Straighten into the same straight line, use the pulling force of the first strut and the second strut to lock the four-bar linkage mechanism, which is beneficial to improve the bearing capacity of the folding seat;

(6) A rear-moving folding seat of the present invention, the seat surface is hinged to the seat surface support block through the seat surface support, and the connecting rod is hinged on the seat surface support, which facilitates the installation of the seat surface and is easy to manufacture;

(7) A kind of rear-moving folding seat of the present invention, the backrest of which is hinged on the seat surface support block through the backrest bracket, and the seat surface support block is provided with a limiter that cooperates with the backrest bracket and can limit the rotation angle of the backrest bracket The groove allows the backrest to rotate at a certain angle, which not only improves the comfort of use, but also facilitates the use of space, reduces the installation distance between the seat and the rear table, and improves space utilization;

(8) A kind of rear-moving folding seat of the present invention, its seat front leg, seat rear leg and seat surface support block constitute seat support unit, and a group of seat support units are respectively arranged on both sides of the seat The unit makes the structure of the seat more stable and reliable, the use noise is small, and the service life is longer.

Description of drawings

Fig. 1 is a schematic diagram of the unfolded structure of a rear-moving folding seat of the present invention;

Fig. 2 is a schematic diagram of the folding structure of a rear-moving folding seat of the present invention;

Fig. 3 is a schematic diagram of the unfolded side view structure of a rear-moving folding seat of the present invention;

Fig. 4 is a schematic diagram of a folding side view structure of a rear-moving folding seat of the present invention;

Fig. 5 is a schematic diagram of the relationship between a rear-moving folding seat of the present invention and the rear table after being folded;

Fig. 6 is a schematic diagram of the cooperation structure between the limit groove of the seat surface support block and the backrest bracket in the present invention;

Fig. 7 is a schematic diagram of the folding principle of a rear-moving folding seat of the present invention.

Explanation of the labels in the schematic diagram:

1. Support; 2. Seat front leg; 3. Seat rear leg; 4. Seat surface support block; 4-1. Limit groove; 5. Seat surface; 6. Backrest; 7. Backrest support; 8. Chair surface support; 9, the first strut; 10, the second strut; 11, the central axis; 12, the connecting rod.

detailed description

In order to further understand the content of the present invention, the present invention will be described in detail in conjunction with the accompanying drawings and embodiments.

Example

As shown in Figures 1 to 4, a rear-moving folding seat of this embodiment includes a support 1, a seat front leg 2, a seat rear leg 3, a seat surface support block 4, a seat surface 5 and a backrest 6. The rear part of the seat surface 5 is hinged on the seat surface support block 4, which can be flipped upwards and folded. The backrest 6 is installed on the seat surface support block 4. The support 1 is used to fix the entire folding seat. The front legs of the seat 2 The bottom of the bottom and the seat rear leg 3 are all hinged on the support 1, and the top of the seat front leg 2 and the top of the seat rear leg 3 are all hinged on the seat surface support block 4, like this, the support 1, The seat front leg 2, the seat rear leg 3 and the seat surface support block 4 constitute a four-bar linkage mechanism, which can realize the seat moving and folding backward; A dead point mechanism is arranged between the seat rear legs 3, which realizes the degree of freedom control of the seat folding mechanism, and makes the seat both stable and flexible; the back of the seat surface 5 is connected with the dead point mechanism through a hinged connecting rod 12 In this way, the use state of the seat can be controlled by turning over the seat surface 5. Specifically, the seat surface 5 is lifted upwards to drive the dead point mechanism to be unlocked through the connecting rod 12, thereby driving the seat front leg 2 and the seat rear leg 3 directions. Rear tilting and folding; the seat surface 5 is pressed down to drive the dead point mechanism through the connecting rod 12 to lock and then the seat front legs 2 and the seat rear legs 3 are placed forward and unfolded. After adopting the above-mentioned structure, the seat surface 5 is folded by using the four-bar linkage mechanism to drive the seat to move backward as a whole. After folding, a large space can be reserved for easy access, and the seat folding has both flexibility and stability.

Referring to Fig. 1 and shown in Fig. 3, in the present embodiment, when the seat surface 5 is pressed down and the seat is launched, the seat front leg 2 and the seat rear leg 3 are all in a vertical position, so that not only the seat The structure is stable, and the seat front legs 2 and the seat rear legs 3 are the main load-bearing parts, similar to traditional seats, which can improve the seat's bearing capacity and meet the needs of people of different weights. In addition, in this embodiment, preferably, the length of the seat rear leg 3 is slightly longer than the length of the seat front leg 2. After such design, according to the characteristics of the four-bar linkage mechanism, after the seat is folded, the seat front leg 2 It can have a larger inclination angle (as shown in Figure 2 and Figure 4), so as to ensure a larger space after the seat is folded, and maximize the convenience of entry and exit; and, because the seat folds need to move backward as a whole, Therefore, a certain space needs to be reserved between the seat and the rear table, and after adopting the above-mentioned structure, the seat can make the seat surface support block 4 drive the backrest 6 to tilt forward after being folded (also can be seen by Fig. 2 and Fig. 4 out), so that the seats can be folded more compactly, which is convenient for the spatial arrangement of the seats and the rear table, and makes full use of the space.

The above-mentioned dead point mechanism has a locked state at the unfolded position of the seat and an unlocked state at the folded position of the seat, so that the flexibility and stability of the folded seat are combined. Specifically in this embodiment, the dead point mechanism includes a first strut 9 and a second strut 10, one end of the first strut 9 is hinged with the middle part of the seat front leg 2, and one end of the second strut 10 is connected to the seat The bottom of the rear leg 3 is hinged, the first strut 9 and the second strut 10 are hinged, and the hinge point of the first strut 9 and the second strut 10 is hinged with one end of the connecting rod 12 . When the seat surface 5 is lifted upwards, the connecting rod 12 pulls the first strut 9 and the second strut 10 to fold, so that the seat front legs 2 and the seat rear legs 3 are tilted and folded backward. When it is down, the connecting rod 12 pushes the first strut 9 and the second strut 10 to stretch apart, so that the seat front leg 2 and the seat rear leg 3 will be stretched apart to realize the seat unfolding, which has the advantages of simple structure, flexibility, reliability, Good stability and other characteristics, and the whole seat is driven to be folded or unfolded by the seat surface 5, the switching is flexible and free, and the movements are synchronized. Preferably, the second strut 10 is hinged with the bottom end of the seat rear leg 3. The lengths of the first strut 9 and the second strut 10 are equal, and when the seat surface 5 is pressed down to expand the seat, the second strut 9 The first strut 9 and the second strut 10 are straightened into the same straight line to form a triangle dead point mechanism, and the tension of the first strut and the second strut is used to lock the four-bar linkage mechanism, which is beneficial to improve the bearing capacity of the folding seat .

As shown in Fig. 2, Fig. 3 and Fig. 4, in this embodiment, the seat surface 5 is hinged with the seat surface support block 4 through the seat surface bracket 8, which is convenient for the installation of the seat surface 5 and is easy to manufacture, and the connecting rod 12 is hinged On the seat support 8, it is more convenient to utilize the seat support 8 to connect the connecting rod 12. In this embodiment, the backrest 6 is hinged on the seat surface support block 4 through the backrest bracket 7, and the seat surface support block 4 is provided with a limit groove 4-1 that cooperates with the backrest support 7 and can limit the rotation angle of the backrest support 7 (Seeing as shown in Figure 6), the angle of rotation of the backrest support 7 in the limit groove 4-1 is 10 ° to 20 °, and the angle of rotation of 15 ° is the best, so that the backrest 6 can rotate at a certain angle. Ergonomics, adapt to people of different body types, improve the comfort of use, and, as shown in Figure 5, after the seat is folded, although the backrest 6 can tilt forward with the seat surface support block 4 at a certain angle, it still cannot reach the optimal position. state, through the rotation setting of the backrest 6, when the seat moves backward as a whole, the backrest 6 can adjust the state between the backrest 6 and the rear row of tables by rotation, so that the backrest 6 can be close to the rear row of tables, reducing the distance between the seat and the rear row of tables. The installation distance between tables makes the distance between tables and chairs more reasonable, further improving the space utilization rate, which not only meets the requirements for the number of tables and chairs installed, but also ensures the flexibility and comfort of the seats.

Above-mentioned seat front leg 2, seat rear leg 3 and seat surface support block 4 can be provided with a group in the middle part of seat surface 5, and seat front leg 2, seat rear leg 3 and seat surface support block 4 need at this moment Larger width and structural strength are used to meet the requirements of use. The disadvantage of this arrangement is that the structural stability will be poor, and the thicker rods will also increase the weight of the seat. Therefore, in this embodiment, preferably, the seat front leg 2, the seat rear leg 3 and the seat surface support block 4 constitute a seat support unit, and a group of seat support units ( As shown in Figure 1 and Figure 2), the structure of the seat is more stable and reliable, the use noise is small, the service life is longer, and the overall weight of the seat can be reduced simultaneously. In addition, the dead point mechanisms between the two groups of seat support units are connected in linkage through the central shaft 11, and the connecting rod 12 is hinged at the middle of the central shaft 11, so that the structure is simple and the stability is very good.

As shown in Figure 7, a schematic diagram of the folding principle of a rear-moving folding seat of this embodiment is given. It can be clearly seen from the figure that the positional relationship between the seat in the unfolded state and the folded state, after folding , The seat as a whole has been moved back a certain distance, leaving a large space in front of the seat, which can greatly facilitate the entry and exit of personnel. Moreover, it can be calculated from the schematic diagram that the degree of freedom of the folding structure of the seat is 1, and the entire seat can be unfolded or folded synchronously by turning over the seat surface 5 . According to the above description, it can be understood that by accurately calculating the length and motion relationship of each rod, the seat can achieve the best use effect, and the seat surface 5 can be turned upward by 90°, and the structure is very compact after folding.

A rear-moving folding seat of the present invention uses a four-bar linkage mechanism to replace the seat legs, and when a person gets up, an external force is applied to the seat surface to turn upwards, so that the folding of the seat surface drives the seat to move backwards, and the folding A large space can be reserved at the back, which is convenient for entry and exit, and solves the problem of giving way between seats conveniently and efficiently. The structure is simple and stable; and the seat folding flexibility and stability are both ingenious and practical Strong, low cost, very convenient and worthy of popularization and application, it can be widely used in press release halls, academic lecture halls and student classrooms.

The present invention and its implementations have been schematically described above, and the description is not restrictive. What is shown in the drawings is only one of the implementations of the present invention, and the actual structure is not limited thereto. Therefore, if a person of ordinary skill in the art is inspired by it, without departing from the inventive concept of the present invention, without creatively designing a structure and an embodiment similar to the technical solution, it shall fall within the scope of protection of the present invention .

Claims (10)

1. A rear-moving folding seat, comprising a support (1), seat front legs (2), seat rear legs (3), seat surface (5) and backrest (6), characterized in that: It includes a seat surface support block (4), the rear part of the seat surface (5) is hinged on the seat surface support block (4), and the described backrest (6) is installed on the seat surface support block (4). The bottom ends of the seat front legs (2) and the seat rear legs (3) are hinged on the support (1), and the top ends of the seat front legs (2) and the seat rear legs The tops of (3) are all hinged on the seat surface support block (4), and the described support (1), seat front leg (2), seat rear leg (3) and seat surface support block (4) constitute Four-bar linkage mechanism; a dead point mechanism is arranged between the seat front leg (2) and the seat rear leg (3), and the back of the seat surface (5) is connected to the dead point through a hinged connecting rod (12) point mechanism connection; The seat surface (5) is lifted upwards to drive the dead point mechanism to unlock through the connecting rod (12) and then drive the seat front legs (2) and seat rear legs (3) to tilt and fold backward; the seat surface (5 ) is pressed down and drives the dead point mechanism to lock by connecting rod (12) and then the front leg of the seat (2) and the rear leg of the seat (3) are put forward and unfolded. 2. A rear-moving folding seat according to claim 1, characterized in that: when the seat surface (5) is pressed down to expand the seat, the front legs (2) of the seat and the back of the seat The legs (3) are all in a vertical position. 3. A receding folding seat according to claim 2, characterized in that: the length of the rear legs (3) of the seat is slightly longer than the length of the front legs (2) of the seat. 4. A rear-moving folding seat according to claim 3, characterized in that: said dead point mechanism comprises a first strut (9) and a second strut (10), said first One end of the strut (9) is hinged with the middle part of the seat front leg (2), one end of the second strut (10) is hinged with the bottom of the seat rear leg (3), and the first strut (9) and the second strut (10) are hinged, and the hinge point of the first strut (9) and the second strut (10) is hinged with one end of the connecting rod (12). 5. A receding folding seat according to claim 4, characterized in that: the lengths of the first strut (9) and the second strut (10) are equal, and on the seat surface (5) ) was pressed down and the seat was launched, the first strut (9) and the second strut (10) were straightened to be the same straight line. 6. A rear-moving folding seat according to claim 5, characterized in that: the seat surface (5) is hinged to the seat surface support block (4) through the seat surface bracket (8), and is connected to Bar (12) is hinged on the seat support (8). 7. A receding folding seat according to any one of claims 1 to 6, characterized in that: the backrest (6) is hinged on the seat support block (4) through the backrest bracket (7) , and the seat surface support block (4) is provided with a limit groove (4-1) that matches with the backrest bracket (7) and can limit the rotation angle of the backrest bracket (7). 8. A rear-moving folding seat according to claim 7, characterized in that: the rotation angle of the backrest bracket (7) in the limiting groove (4-1) is 10°-20°. 9. A rear-moving folding seat according to claim 7, characterized in that: said seat front legs (2), seat rear legs (3) and seat surface support blocks (4) form a seat The chair support unit is provided with a group of seat support units respectively on both sides of the seat. 10. A rear-moving folding seat according to claim 9, characterized in that: the dead point mechanism between the two sets of seat support units is connected through a central shaft (11).