Main structure of a sitting and lying seat

Abstract

The main structure of a sitting and lying seat of the present invention is composed of a frame member and a back member connected by a positioning locking member. The positioning locking member is operated to realize the smooth sitting and lying interaction of the seat; the height of the seat is changed by adjusting the position of the upper and lower straight members; the front and rear extension of the seat is realized by rotating the push-pull members connected to the lower part of the frame member and the seat member, and the movable connection between the seat member and the upper side member; the extension of the back member is realized by the movable connection fixed to the back member connecting plate and the chair lying support movable body; the footrest assembly arranged at the rear end of the frame member enables students arranged in series in the classroom to rest their feet on the footrest assembly. The functions of the present invention such as the elasticity of contraction when sitting and extension when lying are suitable for reclaiming the virgin land of classroom student reclining chairs, realizing the popularization of office chairs and reclining chairs, creating conditions for a good nap method for primary and secondary school students and teachers, etc., benefiting the general public, and being particularly beneficial to the physical and mental development and learning of primary and secondary school students.

Description

Technical Field

[0001] The invention relates to the technical field of educational equipment and furniture, in particular to a main structure of a sitting or lying seat. Background Art

[0002] The seating referred to in this article is a general term for chairs and sofas such as student chairs, office chairs and row chairs.

[0003] 1. A good way of taking a nap is beneficial to the development, physical and mental health and learning of primary and secondary school students, and is beneficial to the physical and mental health and work of teachers and other office staff. The current status of naps in primary and secondary schools that have been implemented or are being implemented varies: most primary and secondary school students adopt an inappropriate sleeping posture lying on the desk; some students bring their own sleeping gear and take a nap on the ground; some schools simply set up a nap classroom;... The technical solution of "a main structure of a dual-purpose student chair and a dual-purpose office chair for sitting and lying" with application number 202020169118.8 adopts a cross-type main body mechanism with obvious characteristics, and adopts a split or linkage mode of the chair back and the seat frame to try to develop a sitting and lying student chair for narrow classrooms, reclaim this virgin land, and use suitable seats to create conditions for a good nap for primary and secondary school students. This technical solution has the following significant advantages: the seat is retractable - it shrinks when sitting and stretches when lying, and the lying position is suitable for students of different heights; the feet are placed on the ground when sitting or lying; the seat height has a wide range of adjustable advantages. These advantages make it adaptable to the characteristics of narrow classrooms and large height differences among students. In the process of consulting and trying out this student reclining chair, we got the following inspiration: ① This technical solution has a large span, and it is difficult for it to take the lead and open up the classroom reclining chair market, which is still in virgin territory; ② Try to find several product development solutions that are suitable for taking the lead and have the same functions and advantages, and cultivate this virgin land from several directions and multiple levels, so that student reclining chairs can bloom; ③ Teaching tools, including student reclining chairs, must be recognized by the education department, school, parents and students. This sales feature tells us that at present, the best design idea for student reclining chairs is to carry out extended development on the basis of the existing student chairs that have been accepted by all parties; while achieving better adaptation to the characteristics of narrow classrooms and large height differences among students, it makes its structure simpler, operation more convenient, price more affordable, easier to popularize and safer, that is, it is easier to be accepted by the market, and provides good nap tools and nap methods for primary and secondary school students. Under the guidance of the above research and development ideas, we have developed and applied for a technical solution with application number 202021790729.0, "A linkage mechanism of a seat back and a seat," based on the existing student chair with adjustable seat height. This technical solution meets all the above requirements. In order to further expand and improve the quality and quantity of student reclining chair products, this solution needs to change the shortcomings of this solution, such as the lying position cannot be adjusted steplessly, the seat can only be retracted, there is only one lying position, and the feet can only be placed on the ground. In order to prepare for the development of student reclining chairs and their adaptation to primary and secondary schools at different levels, this article proposes a new technical solution that is also for extensible development.

[0004] 2. Patent No. ZL201721517914.0 for “retractable sitting and lying dual-purpose office and study chair”, Patent No. ZL201820336205.0 for “a retractable sitting and lying dual-purpose chair” and Application No. 201910637925.X for “a sitting

[0005] The three technical solutions, such as the "sit-to-lie switch mechanism for reclining seats", are also efforts to provide a good way to take a nap for primary and secondary school students and office workers such as teachers. The main mechanisms of these three technical solutions are parallelogram mechanisms. The chair back and the seat frame are linked, and only one operation is required for sitting and lying, which is convenient. For office reclining chairs, these three technical solutions still have room for improvement in realizing their mass consumption and benefiting the general public. They also adopt the extended development ideas of student reclining chairs, and improve them on the basis of office chairs that have been accepted by the market, so that their structure is simpler, the price is more affordable, and it is easier to popularize and realize mass consumption, promote the flourishing of office reclining chairs / lunch break chairs, provide teachers and other office workers with a good way and utensils for taking a nap, and serve the physical and mental health and work of teachers and other office workers. At the same time, it is also convenient for the product to develop in the direction of home furnishings - sofas. Summary of the invention

[0006] The main purpose of the present invention is to provide a main structure of a sitting and lying seat, which is an extended development based on the student chair or office chair that has been accepted by the market, and changes the shortcomings of the student reclining chair that the lying position cannot be adjusted steplessly, the seat can only be retracted, there is only one lying position, and the feet can only be placed on the ground, and further expands and improves the quality and quantity of student reclining chairs and other seating products, making it simpler in structure, more convenient to operate, more affordable, easier to popularize and realize mass consumption, and better adapt to narrow occasions such as classrooms and the characteristics of large height differences among students, trying to take the lead in reclaiming this virgin land at multiple levels, and preparing for the blooming of student reclining chairs and adapting to primary and secondary schools at different levels. In this way, a good way of taking a nap and seating is provided for students and teachers and other office staff, which is beneficial to the development, physical and mental health and learning of primary and secondary school students, and to the physical and mental health and work of teachers and other office staff; better adapt to narrow occasions or improve the utilization rate of office space; and facilitate the development of products in the direction of home furnishings - sofas.

[0007] In order to achieve the above main purpose, the present invention is realized through the following technical solutions. A main structure of a sitting and lying seat mainly consists of a frame component, a back component and a position adjustment and locking component, the frame component mainly consists of an upper frame assembly and a lower frame assembly, the upper frame assembly mainly consists of a seat component, an upper side component, an upper straight component and an upper cross component, the upper side component is a left upper side component and a right upper side component, one end of the upper cross component is fixedly connected to the left upper side component, the other end of the upper cross component is fixedly connected to the right upper side component, the left upper side component, the right upper side component and the upper cross component constitute a seat frame subassembly, the seat component is connected to the seat frame subassembly, the upper straight component is a left upper straight component and a right upper straight component, the appropriate position of the left upper side component is fixedly connected to the upper end of the left upper straight component, the appropriate position of the right upper side component is fixedly connected to the upper end of the left upper straight component, the appropriate position of the right upper side component is fixedly connected to the upper end of the left upper straight component, the appropriate position of the right upper side component is fixedly connected to the upper end of the left upper straight component, the appropriate position of the right upper side component is fixedly connected to the upper end of the left upper straight component, the appropriate position of the left ... The appropriate position is fixedly connected to the upper end of the upper right straight piece, the lower frame assembly is mainly composed of a lower side piece, a lower straight piece and a lower cross piece, the lower side piece is a lower left side piece and a lower right side piece, the lower straight piece is a lower left straight piece and a lower right straight piece, the appropriate position of the lower left side piece is fixedly connected to the lower end of the lower left straight piece, the lower left side piece and the lower left straight piece constitute a lower left side small component, the appropriate position of the lower right side piece is fixedly connected to the lower end of the lower right straight piece, the lower right side piece and the lower right straight piece constitute a lower right side small component, one end of the lower cross piece is fixedly connected to the lower left side small component, the other end of the lower cross piece is fixedly connected to the lower right small component, and the upper straight piece is connected to the lower straight piece. The back member is mainly composed of a back side member, a back cross member and a backrest member. The back side member includes a left back side member and a right back side member. One end of the back cross member is fixedly connected to the left back side member, and the other end of the back cross member is fixedly connected to the right back side member. The left back side member, the right back side member and the back cross member form a back frame subassembly, and the backrest member is fixedly connected to the back frame subassembly. The position adjustment and locking member is mainly composed of a fixed assembly and a movable assembly. The fixed assembly and the movable assembly are movably connected. The fixed assembly is fixedly connected to one of the upper frame assembly and the back frame subassembly, and the movable assembly is fixedly connected to the other of the upper frame assembly and the back frame subassembly.

[0008] The positioning and locking component is a chair lying support component, and the chair lying support component is mainly composed of a chair lying support fixing component, a chair lying support movable component and a chair lying support operating piece. The chair lying support fixing component and the chair lying support movable component are rotatably connected, and the chair lying support operating piece is arranged on the chair lying support fixing component, the chair lying support fixing component is fixedly connected to the upper frame component, and the chair lying support movable component is fixedly connected to the back frame small component.

[0009] The positioning and locking component is a controllable gas spring component, which is mainly composed of a cylinder body assembly, a gas rod assembly and a gas spring operating part. The cylinder body assembly and the gas rod assembly are connected by a moving pair. The gas spring operating part is arranged on the gas rod assembly. The cylinder body assembly is rotatably connected to the lower position of the back frame small assembly, and the gas rod assembly is rotatably connected to the upper shelf assembly. The left back side component and the left upper side component are rotatably connected at the rear end, and the right back side component and the right upper side component are rotatably connected at the rear end.

[0010] The positioning and locking component is a Japanese buckle component, which is mainly composed of a buckle fixing component and a buckle movable component. The buckle fixing component and the buckle movable component are rotatably connected. The buckle fixing component is fixedly connected to one of the upper shelf component and the back frame small component, and the buckle movable component is fixedly connected to the other of the upper shelf component and the back frame small component.

[0011] The positioning and locking component is an adjustable angle component of the chair, which is mainly composed of a main adjustable angle component, a secondary adjustable angle component and an angle adjustment operating component. The main adjustable angle component is mainly composed of a fixed main adjustable angle subcomponent and a movable main adjustable angle subcomponent. The fixed main adjustable angle subcomponent and the movable main adjustable angle subcomponent are rotatably connected. The fixed main adjustable angle subcomponent is fixedly connected to one of the upper side components, and the movable main adjustable angle subcomponent is fixedly connected to one of the back side components. The angle adjustment operating component is arranged on the fixed main adjustable angle subcomponent. The secondary adjustable angle component is mainly composed of a fixed secondary adjustable angle subcomponent and a movable secondary adjustable angle subcomponent. The fixed secondary adjustable angle subcomponent and the movable secondary adjustable angle subcomponent are rotatably connected. The fixed secondary adjustable angle subcomponent is fixedly connected to the other upper side component, and the movable secondary adjustable angle subcomponent is fixedly connected to the other back side component.

[0012] The seat component is connected to the seat frame subassembly so that the two sides of the seat component respectively form a movable pair connection with the upper left side component and the upper right side component. The lower part of the back frame subassembly is rotatably connected to one end of the push-pull component, and the seat component is rotatably connected to the other end of the push-pull component.

[0013] The seat component is fixedly connected to the seat frame subassembly.

[0014] The connection between the upper straight piece and the lower straight piece is a moving pair connection.

[0015] The frame component is provided with a footrest assembly.

[0016] The footrest assembly is a footrest assembly I arranged on the lower frame assembly of the frame component, and the footrest assembly I is mainly composed of a footrest, a left front small support member, a right front small support member, a left rear small support member, a right rear small support member and a positioning member, the two sides in front of the footrest are rotatably connected to the upper ends of the left front small support member and the right front small support member respectively, the two sides behind the footrest are rotatably connected to the upper ends of the left rear small support member and the right rear small support member respectively, the lower ends of the left front small support member and the left rear small support member are rotatably connected to the left lower side member respectively, and the lower ends of the right front small support member and the right rear small support member are rotatably connected to the right lower side member respectively, and the footrest, the left front small support member, the right front small support member, the left rear small support member, the right rear small support member and the lower side member form a parallelogram mechanism frame, and the positioning member is arranged on the parallelogram mechanism frame.

[0017] Through the above structure, the operation and action of the main structure of a sitting and lying seat mainly include the following two situations: the seat part and the upper side part are fixedly connected, there is no push-pull part, and the back part can be extended / adjusted; the seat part and the upper side part are connected in a movable pair, there is a push-pull part, and the seat part can be extended / adjusted. The following takes the adjustment locking part as the chair reclining support part as an example to describe the operation and action of the above two situations.

[0018] 1. The seat and upper side parts are fixedly connected, there is no push-pull part, and the back part can be extended / adjusted.

[0019] The required seat height is set by adjusting the connection positions of the upper straight piece and the lower straight piece connected to the moving pair.

[0020] 1) Switching from a sitting position to a lying position. A person sits on the seat and operates the chair reclining support operating member. The chair reclining support member loses its locking force, but there is still a force to maintain the sitting position. This force to maintain the sitting position increases as the rearward tilt angle of the back member increases. The person leans back against the back member, and the back member rotates backward. At any position of the rearward tilt of the back member, including the position where the back member is tilted backward to the maximum tilt angle, the chair reclining support operating member is operated again, the chair reclining support member restores the locking force, and the back member is locked in this rearward tilted position. This process shows that the reclining position of the seat is steplessly adjusted within the angle range from the sitting position of the back member to the maximum reclining position of the back member. Since the force of the chair reclining support member to maintain the sitting position increases as the angle of the back member increases, the seat can be smoothly and steplessly adjusted.

[0021] 2) Switching from lying position to sitting position.

[0022] The person leaves the seat and operates the chair lying support operating part. Under the push of the force to maintain the sitting posture, the back part rotates forward until the seat returns to the sitting position.

[0023] 3) Extension / adjustment of the back part.

[0024] Select the T-shaped board chair reclining support component, and do the following without adding other parts: loosen the fasteners set on the chair reclining support movable component, pull the back component, and the back component moves up and down with the T-shaped board. At the required position, tighten the fasteners and the back component is positioned at the required position. The up and down adjustment of the back component position changes the reclining length and realizes the extension / adjustment of the back component.

[0025] 4) Use of the footrest assembly.

[0026] When students take a nap in the classroom in an idle area such as a corridor, the students sitting on the reclining chairs are easily arranged in series. The parallelogram mechanism footrest assembly arranged at the rear end of the lower frame assembly is flipped back to the rear upper position, and the feet of the students at the back can be placed on the footrest assembly of the reclining chairs of the students in the front row; when sitting or not in the nap season, the footrest assembly is returned to the front lower position, and the students' belongings can be placed on it.

[0027] Second, the seat part and the upper side part are connected by a movable pair, and there are push-pull parts, so that the seat part can be extended / adjusted.

[0028] The required seat height is set by adjusting the connection positions of the upper straight piece and the lower straight piece connected to the moving pair.

[0029] 1) Switching from sitting to lying position.

[0030] When a person sits on the seat and operates the chair reclining support operating member, the chair reclining support member loses the locking force, but there is still a force to maintain the sitting position. This force to maintain the sitting position increases as the rearward tilt angle of the back member increases. When the person leans back against the back member, and the back member rotates backward, the push-pull member provided under the back member pushes the seat member forward. At any position of the rearward tilt of the back member, the chair reclining support operating member is operated again, the chair reclining support member restores the locking force, the back member is locked in this rearward tilted position, and the seat member is locked in a position corresponding to the back member. When the back member is tilted backward to the maximum tilt angle, the seat member is pushed to the frontmost position. In other words, within the angle range from the sitting position of the back member to the maximum reclining position of the back member, the reclining position of the seat is steplessly adjusted. This is mainly because the force of the chair reclining support member to maintain the sitting position increases as the angle of the back member increases, making the stepless adjustment of the seat smooth.

[0031] 2) Switching from lying position to sitting position.

[0032] The person leaves the seat and operates the chair lying support operating part. Under the force of maintaining the sitting state, the back part rotates forward and the seat part is pulled backward by the push-pull part until the back part and the seat part return to the sitting position of the seat.

[0033] 3) Use of the footrest assembly.

[0034] When students take a nap in the classroom in an idle area such as the corridor, it is easy for students to sit in a series of reclining chairs. The footrest assembly set at the rear end of the lower frame assembly is turned to the upper rear position, and the footrest is moved horizontally to the high position. When the footrest is moved horizontally to the high position, the feet of the students in the back row can be placed on the footrest assembly of the reclining chairs of the students in the front row; when sitting or not in the nap season, the footrest assembly is returned to the front low position, and the footrest is moved horizontally to the lowest position, and students' objects can be placed on it.

[0035] For student reclining chairs, the backrest height cannot be too high due to the requirements of the classroom environment. The seat or back parts can be extended / adjusted to meet the needs of students of different heights for lying and sitting positions; secondly, because the feet are placed on the ground, the student reclining chair can adapt to the sitting and lying of students of different heights in the narrow space of the classroom; thirdly, when a footrest is provided at the rear end of the lower frame assembly, the footrest is pulled up, and when the students' lying positions are arranged in a front-to-back series, the feet of the rear students can be placed on the footrest of the front student chair. This footrest method of resting the students' feet on the footrest improves the comfort of the students' lying positions while adapting to the narrow space of the classroom. Therefore, this student reclining chair can better meet the characteristics of narrow classrooms and large height differences among students. Similar office reclining chairs and reclining sofas can also have these advantages.

[0036] In summary, the present invention is extended and developed on the basis of the student chair or office chair that has been accepted by the market, changing the shortcomings of the student reclining chair that the lying position cannot be adjusted steplessly, the seat can only be extended and retracted, there is only one lying position, and the feet can only be placed on the ground, further expanding and improving the quality and quantity of student reclining chairs and other seating products, making them simpler in structure, more convenient to operate, more affordable, easier to popularize and realize mass consumption, better adapting to narrow occasions such as classrooms and the characteristics of large height differences among students, trying to take the lead in reclaiming this virgin land at multiple levels, and preparing for the blooming of student reclining chairs and adapting to primary and secondary schools at different levels. In this way, a good way to take a nap and seating is provided for students and teachers and other office staff, which is beneficial to the development, physical and mental health and learning of primary and secondary school students, and to the physical and mental health and work of teachers and other office staff; better adapting to narrow occasions or improving the utilization rate of office space; and facilitating the development of products in the direction of home furnishings - sofas. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Two optimal implementation schemes of the present invention are described below in conjunction with the accompanying drawings: 1) The position adjustment and locking component is a chair reclining support component with a T-shaped plate, the seat component and the upper side component are fixedly connected, there is no push-pull component, the back component is adjustable in position, and a footrest component is provided at the rear end of the lower frame component; 2) The position adjustment and locking component is a controllable gas spring component, the seat component and the upper side component are connected in a movable pair, and there is a push-pull component.

[0038] Figure 1 It is a left schematic diagram of the first best implementation example;

[0039] Figure 2for Figure 1 A top view of the diagram;

[0040] Figure 3 It is a left schematic diagram of the second best implementation example;

[0041] Figure 4 for Figure 3 Schematic diagram of top view from direction B. DETAILED DESCRIPTION

[0042] Two examples of the present invention are described in detail below with reference to the accompanying drawings.

[0043] See Figure 1 and Figure 2 The first embodiment is mainly composed of a frame component 1, a back component 2 and a position adjustment and locking component 3. The frame component 1 is mainly composed of an upper frame component 1-1 and a lower frame component 2-1. The upper frame component 1-1 is mainly composed of a seat component 1-1-1, an upper side component 2-1-1, an upper straight component 3-1-1 and an upper cross component 4-1-1 ( Figure 1 The upper side member 2-1-1 is composed of the upper left side member Z-2-1-1 and the upper right side member Y-2-1-1, one end of the upper cross member 4-1-1 is fixedly connected to the upper left side member Z-2-1-1, the other end of the upper cross member 4-1-1 is fixedly connected to the upper right side member Y-2-1-1, the upper left side member Z-2-1-1, the upper right side member Y-2-1-1 and the upper cross member 4-1-1 form a seat frame subassembly ZK, the seat member 1-1-1 is fixedly connected to the seat frame subassembly ZK, and the upper straight member 3-1-1 is the upper left straight member Z-3-1-1 ( Figure 2 dotted line) and the upper right straight piece Y-3-1-1 ( Figure 2 The upper ends of the left upper side member Z-2-1-1 and the left upper straight member Z-3-1-1 are fixedly connected, the upper right side member Y-2-1-1 and the upper right straight member Y-3-1-1 are fixedly connected, and the lower frame assembly 2-1 is mainly composed of the lower side member 1-2-1, the lower straight member 2-2-1 and the lower cross member 3-2-1 ( Figure 1 The lower side piece 1-2-1 is composed of the lower left side piece Z-1-2-1 and the lower right side piece Y-1-2-1, and the lower straight piece 2-2-1 is composed of the lower left straight piece Z-2-2-1 ( Figure 2 dotted line) and the lower right straight piece Y-2-2-1 ( Figure 2The lower left side member Z-1-2-1 and the lower left straight member Z-2-2-1 are fixedly connected at their lower ends, the lower left side member Z-1-2-1 and the lower left straight member Z-2-2-1 form the lower left side subassembly ZXC, the lower right side member Y-1-2-1 and the lower right straight member Y-2-2-1 are fixedly connected at their lower ends, the lower right side member Y-1-2-1 and the lower right straight member Y-2-2-1 form the lower right side subassembly YXC, one end of the lower cross member 3-2-1 is fixedly connected to the lower left side subassembly ZXC, the other end of the lower cross member 3-2-1 is fixedly connected to the lower right side subassembly YXC, the upper straight member 3-1-1 and the lower straight member 2-2-1 are connected by a multi-speed moving pair. The back member 2 is mainly composed of the back side member 1-2, the back cross member 2-2 ( Figure 1 The back member 1-2 is composed of a left back member Z-1-2 and a right back member Y-1-2, one end of the back cross member 2-2 is fixedly connected to the left back member Z-1-2, the other end of the back cross member 2-2 is fixedly connected to the right back member Y-1-2, the left back member Z-1-2, the right back member Y-1-2 and the back cross member 2-2 form a back frame subassembly BK, and the back member 3-2 is fixedly connected to the back frame subassembly BK. The positioning and locking component 3 is mainly composed of a fixed component 1-3 and a movable component 2-3, the fixed component 1-3 and the movable component 2-3 are movably connected, the fixed component 1-3 is fixedly connected to one of the upper frame component 1-1 and the back frame subassembly BK, and the movable component 2-3 is fixedly connected to the other of the upper frame component 1-1 and the back frame subassembly BK. The adjustment and locking component 3 is a chair reclining support component T-3, which is mainly composed of a chair reclining support fixing component 1-T-3, a chair reclining support movable component 2-T-3 and a chair reclining support operating component 3-T-3. Figure 2 The chair is composed of a chair support movable body 1-2-T-3, a T-shaped connecting plate 2-2-T-3 and a fastening member 3-2-T-3 (shown by the dotted line) Figure 2 The chair lying support movable body 1-2-T-3 is connected with the chair lying support movable body 1-2-T-3 by moving pairs, the fastening piece 3-2-T-3 is connected with the chair lying support movable body 1-2-T-3 by thread pairs, the chair lying support fixed assembly 1-T-3 and the chair lying support movable body 1-2-T-3 of the chair lying support movable assembly 2-T-3 are rotatably connected, the chair lying support operating piece 3-T-3 is arranged on the chair lying support fixed assembly 1-T-3, the chair lying support fixed assembly 1-T-3 is fixedly connected to the upper frame assembly 1-1, and the T-shaped connecting plate 2-2-T-3 of the chair lying support movable assembly 2-T-3 is fixedly connected to the back frame small assembly BK.

[0044] The footrest assembly GJ is a footrest assembly I PGJ arranged on the lower frame assembly 2-1 of the frame component 1. The footrest assembly I PGJ mainly consists of a footrest plate 1-PGJ, a left front small support member 2-PGJ ( Figure 2dotted line), right front small support 3-PGJ ( Figure 2 The left rear small support member 4-PGJ, the right rear small support member 5-PGJ and the positioning member 6-PGJ are shown in dotted lines. The two sides in front of the footrest 1-PGJ are respectively connected to the upper ends of the left front small support member 2-PGJ and the right front small support member 3-PGJ. The two sides behind the footrest 1-PGJ are respectively connected to the upper ends of the left rear small support member 4-PGJ and the right rear small support member 5-PGJ. The left front small support member 2-PGJ and the left rear small support member 4-PGJ are connected to the upper ends of the right rear small support member 5-PGJ. The lower end of J is rotatably connected to the left lower side part Z-1-2-1 respectively, and the lower ends of the right front small support part 3-PGJ and the right rear small support part are rotatably connected to the right lower side part Y-1-2-1 respectively. The footrest 1-PGJ, the left front small support part 2-PGJ, the right front small support part 3-PGJ, the left rear small support part 4-PGJ and the right rear small support part 5-PGJ form a parallelogram mechanism frame PJ, and the positioning part 6-PGJ is set on the parallelogram mechanism frame PJ.

[0045] Figure 1 The double-dotted line shows the state of the seat in the lying position. Figure 2 The seat member 1-1-1 and the back member 3-2 are indicated by double-dotted lines.

[0046] See Figure 3 and Figure 4 . This Example 2 only describes the differences from Example 1. The two sides of the seat member 1-1-1 are slidably connected to the left upper side member Z-2-1-1 and the right upper side member Y-2-1-1 respectively, and the lower part of the back frame small component BK is rotatably connected to one end of the push-pull member TL, and the other end of the push-pull member TL is rotatably connected to the seat member 1-1-1. The left back side member Z-1-2 is rotatably connected to the rear end of the left upper side member Z-2-1-1, and the right back side member Y-1-2 is rotatably connected to the rear end of the right upper side member Y-2-1-1.

[0047] The position adjustment and locking component 3 is a controllable gas spring component Q-3, which is mainly composed of a cylinder assembly 1-Q-3, a gas rod assembly 2-Q-3 and a gas spring operating member 3-Q-3. The cylinder assembly 1-Q-3 and the gas rod assembly 2-Q-3 are connected by a moving pair, and the gas spring operating member 3-Q-3 is arranged on the gas rod assembly 2-Q-3. The cylinder assembly 1-Q-3 is rotatably connected to the lower position of the back frame subassembly BK, and the gas rod assembly 2-Q-3 is rotatably connected to the upper cross member 4-1-1 of the upper frame assembly 1-1. There is no footrest assembly GJ on the frame component 1. Figure 3 The double-dotted line indicates the state of the seat in the lying position.

[0048] Through the above structure, the specific operations and actions of Example 1 and Example 2 of the main structure of a sitting and lying seat are as follows.

[0049] 1. Specific operations and actions of Example 1.

[0050] The required height of the seat 1-1-1 is set by adjusting the connection positions of the upper straight member 3-1-1 and the lower straight member 2-2-1 connected by the moving pair.

[0051] 1) Switching from sitting to lying position.

[0052] When a person sits on the seat, he operates the chair reclining support operating part 3-T-3, and the chair reclining support part T-3 loses its locking force, but there is still a force to maintain the sitting position. This force to maintain the sitting position increases as the backward tilt angle of the back part 2 increases. The person leans back against the back part 2, and the back part 2 rotates backward. At any position of the back part 2 tilting backward, including the position where the back part 2 tilts backward to the maximum tilt angle, the chair reclining support operating part 3-T-3 is operated again, and the chair reclining support part T-3 restores the locking force, and the back part 2 is locked in this backward tilted position. This process shows that the reclining position of the seat is steplessly adjusted within the angle range from the sitting position of the back part 2 to the maximum reclining position of the back part 2. Since the force of the chair reclining support part T-3 to maintain the sitting position increases as the angle of the back part 2 increases, the seat can be smoothly and steplessly adjusted.

[0053] 2) Switching from lying position to sitting position.

[0054] The person leaves the seat and operates the chair lying support operating member 3-T-3. Under the force of maintaining the sitting posture, the back member 2 rotates forward until the seat returns to the sitting position.

[0055] 3) Extension / adjustment of the back member 2.

[0056] Select the chair reclining support component T-3 with T-shaped plate, and do the following without adding other parts: loosen the fastening piece 3-2-T-3 set on the chair reclining support movable body 1-2-T-3, pull the back component 2, and the back component 2 moves up and down with the T-shaped connecting plate 2-2-T-3. At the desired position, fasten the fastening piece 3-2-T-3, and the back component 2 is positioned at the desired position. The up and down adjustment of the position of the back component 2 changes the reclining length, and realizes the extension / adjustment of the back component 2.

[0057] 4) Use of the footrest assembly GJ.

[0058] When students take a nap in the classroom in an idle area such as a corridor, it is easy for students to sit in a series arrangement on the reclining chairs. The parallelogram mechanism footrest assembly GJ set at the rear end of the lower frame assembly 2-1 is flipped back to the rear upper position, and the footrest 1-GJ is translated to the high position, so that the feet of the students at the back can be placed on the footrest assembly GJ of the reclining chairs of the students in the front row; when sitting or not in the nap season, the footrest assembly GJ is returned to the front low position, and the footrest 1-GJ is translated to the lowest position, on which students' objects can be placed.

[0059] 2. Specific operations and actions of Example 2.

[0060] The required height of the seat 1-1-1 is set by adjusting the connection positions of the upper straight member 3-1-1 and the lower straight member 2-2-1 connected by the moving pair.

[0061] 1) Switching from sitting to lying position.

[0062] When a person sits on the seat, he operates the gas spring operating member 3-Q-3, and the controllable gas spring member Q-3 loses the locking force, but there is still a force to maintain the sitting position. This force to maintain the sitting position increases as the backward tilt angle of the back member 2 increases. When the person leans back against the back member 2, and the back member 2 rotates backward, the push-pull member TL provided under the back member 2 pushes the seat member 1-1-1 forward. At any position of the backward tilt of the back member 2, the gas spring operating member 3-Q-3 is operated again, and the controllable gas spring member Q-3 restores the locking force, the back member 2 is locked in this backward tilt position, and the seat member 1-1-1 is locked in the position corresponding to the back member 2. When the back member 2 tilts backward to the maximum tilt angle, the seat member 1-1-1 is pushed to the frontmost position. In other words, within the angle range from the sitting position of the back member 2 to the maximum lying position of the back member, the lying position of the seat is steplessly adjusted. During the switching process from sitting position to lying position, the forward movement of the seat component 1-1-1 drives the center of gravity of the human body to move forward, thereby reducing the torque of the center of gravity of the human body on the back component. Under the condition that the force of the controllable gas spring component Q-3 to maintain the sitting state remains unchanged, the stepless adjustment of the seat can still be smooth.

[0063] 2) Switching from lying position to sitting position.

[0064] The person leaves the seat and operates the gas spring operating part 3-Q-3. Under the push of the controllable gas spring part Q-3 to maintain the sitting state, the back part 2 rotates forward and the seat part 1-1-1 is pulled back by the push-pull part TL until the back part 2 and the seat part 1-1-1 return to the sitting position of the seat.

[0065] For student reclining chairs, the height of the chair back cannot be too high due to the requirements of the classroom environment. The seat component 1-1-1 or the back component 2 is extended / adjusted to meet the needs of students of different heights for lying and sitting positions; secondly, because the feet are resting on the ground, the student reclining chair can adapt to the sitting and lying of students of different heights in the narrow space of the classroom; thirdly, when a parallelogram mechanism footrest assembly GJ is provided at the rear end of the lower frame assembly 2-1, the footrest assembly GJ is pulled up, and when the students' lying positions are arranged in a front-to-back series, the feet of the rear students can be placed on the footrest assembly GJ of the front student chair. This way of resting the students' feet on the footrest assembly GJ improves the comfort of the students' lying positions while adapting to the narrow space of the classroom. Therefore, this student reclining chair can better meet the characteristics of narrow classrooms and large height differences among students. Similar office reclining chairs and reclining sofas can also have these advantages.

[0066] In summary, the present invention is extended and developed on the basis of the student chair or office chair that has been accepted by the market, changing the shortcomings of the student reclining chair that the lying position cannot be adjusted steplessly, the seat can only be extended and retracted, there is only one lying position, and the feet can only be placed on the ground, further expanding and improving the quality and quantity of student reclining chairs and other seating products, making them simpler in structure, more convenient to operate, more affordable, easier to popularize and realize mass consumption, better adapting to narrow occasions such as classrooms and the characteristics of large height differences among students, trying to take the lead in reclaiming this virgin land at multiple levels, and preparing for the blooming of student reclining chairs and adapting to primary and secondary schools at different levels. In this way, a good way to take a nap and seating is provided for students and teachers and other office staff, which is beneficial to the development, physical and mental health and learning of primary and secondary school students, and to the physical and mental health and work of teachers and other office staff; better adapting to narrow occasions or improving the utilization rate of office space; and facilitating the development of products in the direction of home furnishings - sofas.

Claims

1. A main structure of a sitting or lying seat, which is mainly composed of a frame component, a back component and a position adjustment and locking component, characterized in that: The frame component (1) is mainly composed of an upper frame component (1-1) and a lower frame component (2-1); the upper frame component (1-1) is mainly composed of a seat component (1-1-1), an upper side component (2-1-1), an upper straight component (3-1-1) and an upper cross component (4-1-1); the upper side component (2-1-1) is a left upper side component (Z-2-1-1) and a right upper side component (Y-2-1-1); one end of the upper cross component (4-1-1) is fixedly connected to the left upper side component (Z-2-1-1); the other end of the upper cross component (4-1-1) is fixedly connected to the right upper side component (Y-2-1-1); the left upper side component (Z-2-1-1), the right upper side component (Y-2-1-1) and the upper The cross member (4-1-1) forms a seat frame subassembly (ZK), the seat member (1-1-1) is connected to the seat frame subassembly (ZK) for fixed connection, the upper straight member (3-1-1) is composed of a left upper straight member (Z-3-1-1) and a right upper straight member (Y-3-1-1), the appropriate position of the left upper side member (Z-2-1-1) is fixedly connected to the upper end of the left upper straight member (Z-3-1-1), the appropriate position of the right upper side member (Y-2-1-1) is fixedly connected to the upper end of the right upper straight member (Y-3-1-1), the lower frame assembly (2-1) is mainly composed of a lower side member (1-2-1), a lower straight member (2-2-1) and a lower cross member (3-2-1), the lower side member (1-2-1 ) is a lower left side member (Z-1-2-1) and a lower right side member (Y-1-2-1), the lower straight member (2-2-1) is a lower left straight member (Z-2-2-1) and a lower right straight member (Y-2-2-1), the appropriate position of the lower left side member (Z-1-2-1) is fixedly connected to the lower end of the lower left straight member (Z-2-2-1), the lower left side member (Z-1-2-1) and the lower left straight member (Z-2-2-1) form a lower left side subassembly (ZXC), the appropriate position of the lower right side member (Y-1-2-1) is fixedly connected to the lower end of the lower right straight member (Y-2-2-1), the lower right side member (Y-1-2-1) and the lower right straight member (Y-2-2-1) form a lower right side subassembly The back member (2) is a back member (YXC), one end of the lower cross member (3-2-1) is fixedly connected to the left lower side small component (ZXC), the other end of the lower cross member (3-2-1) is fixedly connected to the right lower side small component (YXC), the upper straight member (3-1-1) is connected to the lower straight member (2-2-1), the back member (2) is mainly composed of a back side member (1-2), a back cross member (2-2) and a backrest member (3-2), the back side member (1-2) is a left back side member (Z-1-2) and a right back side member (Y-1-2), one end of the back cross member (2-2) is fixedly connected to the left back side member (Z-1-2), and the other end of the back cross member (2-2) is fixedly connected to the right back side member (Y-1-2),The left back side member (Z-1-2), the right back side member (Y-1-2) and the back cross member (2-2) form a back frame subassembly (BK), the backrest member (3-2) is fixedly connected to the back frame subassembly (BK), the position adjustment locking member (3) is a chair reclining support member (T-3), and the chair reclining support member (T-3) mainly comprises a chair reclining support fixing member (1-T-3), a chair reclining support movable member (2-T-3) and a chair reclining support operating member. The chair support fixing component (1-T-3) and the chair support movable component (2-T-3) are rotatably connected, the chair support operating component (3-T-3) is arranged on the chair support fixing component (1-T-3), the chair support fixing component (1-T-3) is fixedly connected to the upper frame component (1-1), and the chair support movable component (2-T-3) is fixedly connected to the back frame small component (BK).

2. The main structure of a sitting or lying seat according to claim 1, characterized in that: The connection between the upper straight piece (3-1-1) and the lower straight piece (2-2-1) is a moving pair connection.

3. The main structure of a sitting or lying seat according to claim 1, characterized in that: The frame component (1) is provided with a footrest assembly (GJ), the footrest assembly (GJ) is a footrest assembly I (PGJ) arranged on a lower frame assembly (2-1) of the frame component (1), and the footrest assembly I (PGJ) mainly comprises a footrest board (1-PGJ), a left front small support member (2-PGJ), and a right front small support member. The footrest (1-PGJ) is composed of a left rear small support member (3-PGJ), a left rear small support member (4-PGJ), a right rear small support member (5-PGJ) and a positioning member (6-PGJ), the two sides in front of the footrest (1-PGJ) are respectively rotatably connected to the upper ends of the left front small support member (2-PGJ) and the right front small support member (3-PGJ), the two sides in the back of the footrest (1-PGJ) are respectively rotatably connected to the upper ends of the left rear small support member (4-PGJ) and the right rear small support member (5-PGJ), the lower ends of the left front small support member (2-PGJ) and the left rear small support member (4-PGJ) are respectively connected to the The left lower side member (Z-1-2-1) is rotatably connected, and the lower ends of the right front small support member (3-PGJ) and the right rear small support member are respectively rotatably connected to the right lower side member (Y-1-2-1). The footrest (1-PGJ), the left front small support member (2-PGJ), the right front small support member (3-PGJ), the left rear small support member (4-PGJ), the right rear small support member (5-PGJ) and the lower side member (1-2-1) form a parallelogram frame (PJ), and the positioning member (6-PGJ) is arranged on the parallelogram frame (PJ).

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