阅读说明：本技术 一种学生午休椅的椅背和椅座的连接机构 (Connecting mechanism for chair back and chair seat of student noon break chair ) 是由 韩宝兴 韩康 于 2021-08-27 设计创作，主要内容包括：本发明的一种学生午休椅的椅背和椅座的连接机构,主要由椅背组件、椅座组件、连接组件和限位件组成。椅背组件的左右背侧件和椅座组件左右座侧件转动连接,设置于椅背组件和椅座组件间的连接组件,按其多种设置和操作,实现学生午休椅椅背的坐躺互切,为实施教育部的“睡眠令”创造硬件条件,为中小学生创造良好的午睡方式。本发明是在已被市场接受的学生椅上,进行的延伸性开发,其研发思路和产品具强的实用性和创造性,适用于教室窄小场合和所有中小学生使用,结构简单、操作便捷,安全可靠,易被市场接受推广。(The invention relates to a connecting mechanism of a chair back and a chair seat of a student noon break chair, which mainly comprises a chair back component, a chair seat component, a connecting component and a limiting piece. The left back side piece and the right back side piece of the chair back component are rotationally connected with the left seat side piece and the right seat side piece of the chair seat component, the connecting component arranged between the chair back component and the chair seat component realizes the mutual switching of sitting and lying of the chair back of the chair for noon break of students according to various settings and operations, creates hardware conditions for implementing sleep orders of education departments, and creates a good noon break mode for primary and secondary school students. The invention is the extension development on the student chair accepted by the market, the research and development thought and the product have strong practicability and creativity, the invention is suitable for the narrow occasions of classrooms and all students in middle and primary schools, the structure is simple, the operation is convenient, the invention is safe and reliable, and the invention is easy to be accepted and popularized by the market.)

1. The utility model provides a coupling mechanism of back of chair and seat support of student's noon break chair, it mainly comprises back of the chair subassembly (1), seat support subassembly (2), coupling assembling (3) and locating part (4), back of the chair subassembly (1) mainly by back side spare (1-1), back horizontal part (2-1) and back spare (3-1) are constituteed, back side spare (1-1) for left back side spare (Z-1-1) and right back side spare (Y-1-1), the one end of back horizontal part (2-1) with left back side spare (Z-1-1) link firmly, the other end of back horizontal part (2-1) with right back side spare (Y-1-1) link firmly, back horizontal part (2-1) with left back side spare (Z-1-1) and right back side spare (Y-1-1) constitute back frame conjunction (B) K), the back piece (3-1) is connected to the back frame combining piece (B-K), the seat component (2) mainly comprises a seat side piece (1-2), a seat cross piece (2-2) and a seat piece (3-2), the seat side piece (1-2) comprises a left seat side piece (Z-1-2) and a right seat side piece (Y-1-2), one end of the seat cross piece (2-2) is fixedly connected with the left seat side piece (Z-1-2), the other end of the seat cross piece (2-2) is fixedly connected with the right seat side piece (Y-1-2), the left seat side piece (Z-1-2), the right seat side piece (Y-1-2) and the seat cross piece (2-2) form the seat frame combining piece (Z-K), seat spare (3-2) link firmly seat frame conjunction (Z-K) on, the suitable position of left back side spare (Z-1-1) hypomere with the rear end suitable position of left seat side spare (Z-1-2) rotate and connect, the suitable position of right back side spare (Y-1-1) hypomere with the rear end suitable position of right seat side spare (Y-1-2) rotate and connect, locating part (4) link firmly back frame conjunction (B-K) with the limiting position between seat frame conjunction (Z-K), coupling assembling (3) set up back of the chair subassembly (1) with between seat support subassembly (2).

2. A mechanism for connecting the back and seat of a student's noon break chair as claimed in claim 1, wherein said connecting assembly (3) is disposed between said back assembly (1) and said seat assembly (2) by: the connecting assembly (3) is a connecting assembly I (3-I), the connecting assembly I (3-I) mainly comprises a connecting assembly I (1-3-I), a fastening assembly I (2-3-I), an elastic assembly I (3-3-I) and a positioning piece I (4-3-I), the connecting assembly I (3-I) comprises a left connecting small assembly I (Z-3-I) and a right connecting small assembly I (Y-3-I), the left connecting small assembly I (Z-3-I) mainly comprises a left connecting assembly I (1-Z-3-I), a left fastening assembly I (2-Z-3-I), a left elastic assembly I (3-Z-3-I) and a left positioning piece I (4-Z-3-I), the right connecting small assembly I (Y-3-I) mainly comprises a right connecting piece I (1-Y-3-I), a right fastening piece I (2-Y-3-I), a right elastic piece I (3-Y-3-I) and a right positioning piece I (4-Y-3-I), wherein one ends of the left fastening piece I (2-Z-3-I) and the right fastening piece I (2-Y-3-I) are respectively provided with an open slot (C), the left connecting piece I (1-Z-3-I) is connected with the lower end of the left back side piece (Z-1-1), the left connecting piece I (1-Z-3-I) is rotationally connected with the left fastening piece I (2-Z-3-I), the left positioning piece I (4-Z-3-I) is connected to the left seat side piece (Z-1-2), the open slot (C) of the left fastening piece I (2-Z-3-I) can be connected with the left positioning piece I (4-Z-3-I), one end of the left elastic piece I (3-Z-3-I) is connected to the proper position of the left fastening piece I (2-Z-3-I), the other end of the left elastic piece I (3-Z-3-I) is connected to the proper position of one of the left back side piece (Z-1-1) and the left seat side piece (Z-1-2), and the lower end of the right connecting piece I (1-Y-3-I) and the right back side piece (Y-1-1) is connected The right connecting piece I (1-Y-3-I) is rotatably connected with the right fastening piece I (2-Y-3-I), the right positioning piece I (4-Y-3-I) is connected with the right seat side piece (Y-1-2), the open slot (C) of the right fastening piece I (2-Y-3-I) can be connected with the right positioning piece I (4-Y-3-I), one end of the right elastic piece I (3-Y-3-I) is connected with the right fastening piece I (2-Y-3-I) at a proper position, and the other end of the right elastic piece I (3-Y-3-I) is connected with one of the right back side piece (Y-1-1) and the right seat side piece (Y-1-2) In place.

3. The connecting mechanism for the back and the seat of a student's noon break chair as claimed in claim 2, wherein one end of the cross-lifting bar (H-G) is connected to the right fastening piece I (2-Z-3-I) at a suitable position, and the other end of the cross-lifting bar (H-G) is connected to the right fastening piece I (2-Y-3-I) at a suitable position.

4. The connecting mechanism for the back and seat of student's noon break chair as claimed in claim 2, wherein one end of said left elastic member I (3-Z-3-I) is connected to said left fastening member I (2-Z-3-I) at a suitable position, the other end of said left elastic member I (3-Z-3-I) is connected to one of said left back member (Z-1-1) and said left seat member (Z-1-2) at a suitable position, one end of said right elastic member I (3-Y-3-I) is connected to said right fastening member I (2-Y-3-I) at a suitable position, and the other end of said right elastic member I (3-Y-3-I) is connected to said right back member (Y-1-1) and said right seat member (Y-1-1) at a suitable position One of the parts (Y-1-2) is suitably positioned in such a way that: the elastic part I3-3-I is a torsion spring N-3-3-I, the left elastic part I (3-Z-3-I) and the right elastic part I (3-Y-3-I) are respectively a left torsion spring (N-3-Z-3-I) and a right torsion spring (N-3-Y-3-I), the other end of the left torsion spring (N-3-Z-3-I) is connected to the proper position of the left back side part (Z-1-1), and the other end of the right torsion spring (N-3-Y-3-I) is connected to the proper position of the right back side part (Y-1-1).

5. The connecting mechanism for the back and seat of student's noon break chair as claimed in claim 2, wherein one end of said left elastic member I (3-Z-3-I) is connected to said left fastening member I (2-Z-3-I) at a suitable position, the other end of said left elastic member I (3-Z-3-I) is connected to one of said left back member (Z-1-1) and said left seat member (Z-1-2) at a suitable position, one end of said right elastic member I (3-Y-3-I) is connected to said right fastening member I (2-Y-3-I) at a suitable position, and the other end of said right elastic member I (3-Y-3-I) is connected to said right back member (Y-1-1) and said right seat member (Y-1-1) at a suitable position The proper positioning of one of the elements (Y-1-2) is achieved by: the elastic part I (3-3-I) is a tension spring, the left elastic part I (3-Z-3-I) and the right elastic part I (3-Y-3-I) are respectively a left tension spring and a right tension spring, the other end of the left tension spring is connected to the proper position of the left seat side part (Z-1-2), and the other end of the right tension spring is connected to the proper position of the right seat side part (Y-1-2).

6. A mechanism for connecting the back and seat of a student's noon break chair as claimed in claim 1, wherein said connecting assembly (3) is disposed between said back assembly (1) and said seat assembly (2) by: coupling assembling (3) be coupling assembling II (3-II), coupling assembling II (3-II) mainly by cover (1-3-II), decide tight little pole (2-3-II), pressure spring (3-3-II), draw piece (4-3-II) and push up tight structure (5-3-II) and constitute, coupling assembling II (3-II) connect little subassembly II (Z-3-II) and connect little subassembly II (Y-3-II) for a left side, left side connect little subassembly II (Z-3-II) mainly by left cover (1-Z-3-II), decide tight little pole (2-Z-3-II) on a left side, left pressure spring (3-Z-3-II), draw piece (4-Z-3-II) and push up tight structure (5-Z-3-II) on a left side -II) said left stator

(1-Z-3-II) is connected to one of the left back side piece (Z-1-1) and the left seat side piece (Z-1-2), the left fastening small rod (2-Z-3-II) is movably connected with the left fixed sleeve (1-Z-3-II), the left pressure spring (3-Z-3-II) is arranged between the left fixed sleeve (1-Z-3-II) and the left fastening small rod (2-Z-3-II), one end of the left fastening small rod (2-Z-3-II) is connected with the left pulling piece (4-Z-3-II), and the left jacking structure (5-Z-3-II) is arranged on the left back side piece (Z-1-1) and the left seat side piece (Z-1-1) and the left seat side piece (Z-3-II) -1-2), said left tightening structure (5-Z-3-II) being connectable to the other end of said left tightening rod (2-Z-3-II), said right connecting sub-assembly II (Y-3-II) consisting essentially of a right retainer (1-Y-3-II), a right tightening rod (2-Y-3-II), a right compression spring (3-Y-3-II), a right pull member (4-Y-3-II) and a right tightening structure (5-Y-3-II), said right retainer (1-Y-3-II) being connected to one of said right back member (Y-1-1) and said right seat member (Y-1-2), the right fastening small rod (2-Y-3-II) is movably connected with the right fixed sleeve (1-Y-3-II), the right pressure spring (3-Y-3-II) is arranged between the right fixed sleeve (1-Y-3-II) and the right fastening small rod (2-Y-3-II), one end of the right fastening small rod (2-Y-3-II) is connected with the right pulling piece (4-Y-3-II), the right jacking structure (5-Y-3-II) is arranged on the other one of the right back side piece (Y-1-1) and the right seat side piece (Y-1-2), and the right jacking structure (5-Y-3-II) can be connected with the right fastening small rod (2-Y-3-) II) are connected at the other end.

7. A mechanism for connecting the back and seat of a student's noon break chair as claimed in claim 1, wherein said connecting assembly (3) is disposed between said back assembly (1) and said seat assembly (2) by: coupling assembling (3) be coupling assembling III, coupling assembling III be step-by-step locking Assembly, step-by-step locking Assembly be step-by-step locking Assembly and step-by-step locking Assembly in the right side, step-by-step locking Assembly's the position that moves with suitable position of left back side spare (Z-1-1) link firmly, step-by-step locking Assembly's quiet position with suitable position of left seat side spare (Z-1-2) link firmly, step-by-step locking Assembly in the right side move the position with suitable position of right back side spare (Y-1-1) link firmly, step-by-step locking Assembly's quiet position with suitable position of right seat side spare (Y-1-2) link firmly.

8. The connecting mechanism for the back and seat of a student's noon break chair as claimed in claim 7, it is characterized in that the step locking component is a Japanese buckle which is a left Japanese buckle and a right Japanese buckle, the movable part of the left Japanese button is fixedly connected with the lower part of the left back side piece (Z-1-1), the static part of the left Japanese button is fixedly connected with the rear part of the left seat side piece (Z-1-2), the movable part of the left Japanese button is rotationally connected with the static part of the left Japanese button, the movable part of the right Japanese button is fixedly connected with the lower part of the right back side piece (Y-1-1), the static part of the right Japanese button is fixedly connected with the rear part of the right seat side piece (Y-1-2), and the movable part of the right Japanese button is rotationally connected with the static part of the right Japanese button.

9. The connecting mechanism of the chair back and the chair seat of the student's noon break chair as claimed in claim 1, wherein the back member (3-1) is composed of a movable back member and a fixed back member, the movable back member is movably connected with the back frame combining member (B-K), and the fixed back member is fixedly connected with the back frame combining member (B-K).

10. The connecting mechanism for the back and seat of a student's noon break chair as claimed in claim 9, wherein a clamping structure is provided between said movable back member and said back frame engaging member (B-K).

Technical Field

The invention relates to the technical field of education equipment and furniture, in particular to a connecting mechanism of a chair back and a chair seat of a student noon break chair.

Background

The seat for primary and secondary school students in classroom develops from stool to chair with nonadjustable chair seat and chair with adjustable chair seat in terms of function along with the development of times and the needs of physical and mental health of students. With the issuance of 'sleeping orders' of the national department of education and the attention paid to the noon nap of primary and secondary school students, the students chair with the height-adjustable seat can be predicted to develop towards the direction of adapting to the narrow and small occasions of classrooms and the noon break chairs of all the primary and secondary school students, and is a general event. In order to meet the requirement, two technical schemes of 'a sitting and lying switching frame of sitting and lying seat' with the patent number ZL201921475978.8 and 'a main body structure of a sitting and lying dual-purpose student chair and a sitting and lying office chair' with the application number 202020169118.8 try to develop a noon break chair for students in narrow and small occasions such as classrooms and the like in virgo, and create conditions for providing proper and good noon nap modes for primary and secondary school students.

The student noon break chair manufactured according to the two technical schemes has the obvious advantages that: the classroom desk is suitable for middle and primary school students to use in classrooms; secondly, when the chair is in a sitting position, the chair seat and the chair back are not linked, namely the angle between the chair back and the chair seat is not changed, and when the height of the chair seat is adjusted, the chair back and the chair seat move up and down together. The chair seat has a large height adjusting range and is suitable for students with heights of more than 180cm to about 130 cm; when the student lies, the chair seat is linked with the chair back, the chair back and the chair seat have multiple angles, and the lying position is suitable for students with the height of more than 180cm to about 130 cm; the feet are placed on the ground, so that the occupied space of the lying position is greatly reduced; the structure is simple, the operation is convenient and fast, and the locking is reliable; sixthly, the safety is realized.

Important information is obtained in inquiry and visual investigation of the student noon break chair manufactured by the two technical schemes: to popularize a new student appliance, according to the characteristics of the vigorous students, the importance of parents on the physical and mental health of students, the popularization requirement of price and the adaptability to the narrow occasions such as classrooms and the like, the important points are that: firstly, the requirements of safety, reliability and popularization price are met; secondly, the use and popularization of the student appliance, in particular to the student noon break chair which is used in narrow and small occasions in classrooms and suitable for all students in middle and primary schools, are a special care. It has obvious market characteristics: the product can be quickly and durably popularized only after being accepted by four groups of education departments, school parties, parents, students and the like, and has strong vitality; and a new product developed at present is developed on the basis of the product so as to adapt to various requirements.

This important research information gives us the development inspiration and new idea: the development of new chair products for noon break of students in classrooms and students meets the requirements of safety, reliability and popularization price, and the development is gradually conducted, and the development is firstly conducted on the basis of the existing products approved by people in the four aspects, so that the lying function of the chair products is increased, and the requirements of safety, reliability and popularization price are met. Therefore, the method can quickly obtain the recognition of the people in the four aspects, is easy to obtain and excite the development power of class seat production companies, is quickly and durably popularized, has strong competitiveness, quickly provides proper and good afternoon nap mode creation conditions for primary and secondary school students, and provides hardware support for implementing the 'sleep command' issued by the education department at the end of 3 months in the year. The progressive extensibility development seems to be simpler, but is more effective and accords with market characteristics in development thinking and products, and has strong vitality and creativity.

Disclosure of Invention

The invention mainly aims to provide a connecting mechanism of a chair back and a chair seat of a student noon break chair, which is used for trying to develop a class of student noon break chairs suitable for being used in narrow and small occasions such as classrooms and all primary and secondary school students by adopting various methods for adjusting the angle of the chair back and arranging the angle-adjustable chair back on the basis of the existing student chairs which are accepted by the market and have adjustable chair seat heights; meanwhile, the novel product can quickly obtain the recognition of the four groups of people, development power of desk and chair production companies on the basis of existing products is easily excited, the rapid and lasting popularization is achieved, hardware conditions are created for implementing sleep orders of education departments, good noon break modes are provided for primary and secondary school students, and the health, the physical and mental development and the learning efficiency of the students are further improved.

In order to achieve the main object, the present invention is achieved by the following technical means. The utility model provides a coupling mechanism of the back of the chair of student's noon break chair and seat support mainly comprises back of the chair subassembly, seat support subassembly, coupling assembling and locating part, the back of the chair subassembly mainly constitute by back of the body spare, back of the body spare and back of the body spare, back of the body spare be left back spare and right back spare, the one end of back of the body spare with left back spare link firmly, the other end of back of the body spare with right back spare link firmly, back of the body spare with left back spare reach right back spare component back of the body frame conjunction, back of the body spare connect back of the body frame conjunction on. The seat component mainly comprises a seat side part, a seat cross part and a seat board, wherein the seat side part comprises a left seat side part and a right seat side part, one end of the frame cross member is fixedly connected with the left seat side member, the other end of the frame cross member is fixedly connected with the right seat side member, the left seat side piece, the right seat side piece and the frame cross piece form a seat frame combining piece, the seat plate is fixedly connected on the seat frame combining piece, the proper position of the lower section of the left back side part is rotationally connected with the proper position of the rear end of the left seat side part, the proper position of the lower section of the right back side part is rotationally connected with the proper position of the right seat side part, the limit part is fixedly connected to the limit position between the back frame combining part and the seat frame combining part, and the connecting component is arranged between the back chair component and the seat component.

The connecting assembly is arranged between the chair back assembly and the chair seat assembly and is realized in such a way that: the connecting assembly is a connecting assembly I, the connecting assembly I mainly comprises a connecting piece I, a fastening piece I, an elastic piece I and a positioning piece I, the connecting assembly I is a left connecting small assembly I and a right connecting small assembly I, the left connecting small assembly I mainly comprises a left connecting piece I, a left fastening piece I, a left elastic piece I and a left positioning piece I, the right connecting small assembly I mainly comprises a right connecting piece I, a right fastening piece I, a right elastic piece I and a right positioning piece I, open slots are formed in one ends of the left fastening piece I and the right fastening piece I, the left connecting piece I is connected with the lower end of the left back side piece, the left connecting piece I is rotatably connected with the left fastening piece I, the left positioning piece I is connected to the left seat side piece, the open slots of the left fastening piece I can be connected with the left positioning piece I, one end of the left elastic piece I is connected to a proper position of the left fastening piece I, and the other end of the left elastic piece I is connected to a proper position of one of the left back side piece and the left seat side piece. The right connecting piece I is connected with the lower end of the right back side piece, the right connecting piece I is rotatably connected with the right fastening piece I, the right positioning piece I is connected on the right seat side piece, an open slot of the right fastening piece I can be connected with the right positioning piece I, one end of the right elastic piece I is connected on a proper position of the right fastening piece I, and the other end of the right elastic piece I is connected on a proper position of one of the right back side piece and the right seat side piece.

One end of a transverse lifting rod is connected to the proper position of the left fastening piece I, and the other end of the transverse lifting rod is connected to the proper position of the right fastening piece I.

One end of the left elastic piece I is connected to a proper position of the left fastening piece I, the other end of the left elastic piece I is connected to a proper position of one of the left back side piece and the left seat side piece, one end of the right elastic piece I is connected to a proper position of the right fastening piece I, and the other end of the right elastic piece I is connected to a proper position of one of the right back side piece and the right seat side piece, so that the following steps are performed: the elastic part I be the torsional spring, left elastic part I with right elastic part I be left torsional spring and right torsional spring, the other end of left torsional spring connect the suitable position of left back spare on, the other end of right torsional spring connect the suitable position of right back spare on.

One end of the left elastic member I is connected to a proper position of the left fastening member I, the other end of the left elastic member I is connected to a proper position of one of the left back side member and the left seat side member, one end of the right elastic member I is connected to a proper position of the right fastening member I, and the other end of the right elastic member I is connected to a proper position of one of the right back side member and the right seat side member, which are realized in such a way that: elastic component I be the extension spring, left elastic component I with right elastic component I be left extension spring and right extension spring, the other end of left extension spring connect the suitable position of left side seat side spare on, the other end of right extension spring connect the suitable position of right side seat side spare on.

The connecting assembly is arranged between the chair back assembly and the chair seat assembly and is realized in such a way that: the connecting component is a connecting component II which mainly comprises a fixed sleeve, a fixed small rod, a pressure spring, a pulling piece and a jacking structure, the connecting component II is a left connecting small component II and a right connecting small component II, the left connecting small component II mainly comprises a left fixed sleeve, a left fastening small rod, a left pressure spring, a left pulling piece and a left jacking structure, the left stator sleeve is connected to one of the left back side member and the left seat side member, the left fastening small rod is movably connected with the left fixed sleeve, the left pressure spring is arranged between the left fixed sleeve and the left fastening small rod, one end of the left tightening small rod is connected with the left pulling piece, the left tightening structure is arranged on the other one of the left back side piece and the seat side piece, and the left tightening structure can be connected with the other end of the left tightening small rod. The right connecting small component II mainly comprises a right fixed sleeve, a right fixed tightening small rod, a right pressure spring, a right pulling piece and a right pushing and tightening structure, the right fixed sleeve is connected to one of the right back side piece and the right seat side piece, the right fixed tightening small rod is movably connected with the right fixed sleeve, the right pressure spring is arranged between the right fixed sleeve and the right fixing small rod, one end of the right fixing small rod is connected with the right pulling piece, the right pushing and tightening structure is arranged on the other one of the right back side piece and the right seat side piece, and the right pushing and tightening structure can be connected with the other end of the right fixing small rod.

The connecting assembly is arranged between the chair back assembly and the chair seat assembly and is realized in such a way that: coupling assembling be coupling assembling III, coupling assembling III be step-by-step locking Assembly, step-by-step locking Assembly be step-by-step locking Assembly and step-by-step right locking Assembly, step-by-step locking Assembly's the position that moves with the suitable position of left back side spare link firmly, step-by-step left locking Assembly's quiet position with the suitable position of left seat side spare link firmly, step-by-step right locking Assembly move the position with the suitable position of right back side spare link firmly, step-by-step right locking Assembly's quiet position with the suitable position of right seat side spare link firmly.

The step locking assembly is a Japanese buckle, the Japanese buckle is a left Japanese buckle and a right Japanese buckle, the movable part of the left Japanese buckle is fixedly connected with the lower part of the left back side piece, the static part of the left Japanese buckle is fixedly connected with the rear part of the left seat side piece, the movable part of the left Japanese buckle is rotatably connected with the static part of the left Japanese buckle, the movable part of the right Japanese buckle is fixedly connected with the lower part of the right back side piece, the static part of the right Japanese buckle is fixedly connected with the rear part of the right seat side piece, and the movable part of the right Japanese buckle is rotatably connected with the static part of the right Japanese buckle.

The back piece consists of a movable back piece and a fixed back piece, the movable back piece is movably connected with the back frame combining piece, and the fixed back piece is fixedly connected on the back frame combining piece.

A clamping structure is arranged between the movable back piece and the back frame combining piece.

With the above structure, the following operation and action descriptions will be given by taking two cases of the connecting assembly I and the connecting assembly II with the torsion spring as an example.

Firstly, the operation and action of a connecting component I with a torsion spring.

When the chair is in a sitting position, the open slots of the left and right fastening pieces respectively clamp the left and right positioning pieces under the elastic action of the left and right torsion springs, and the chair back component is locked at the sitting position. The transverse lifting rod is lifted to overcome the elasticity of the left and right torsion springs, the left and right fastening pieces rotate downwards, the chair back component tilts backwards under the action of self gravity after the open slot is separated from the left and right positioning pieces to drive the left and right fastening pieces to extend forwards, and the chair back component is positioned in a lying position after the left and right limiting pieces lean against the left and right seat side pieces. When the chair is in the lying position, if the height of the chair seat is adjustable, the chair seat is adjusted to the low position, then the chair is laid down, and the feet are placed on the ground or the rear foot rest of the front student noon break chair, so that the trouble of taking off shoes is avoided. If the height of the chair seat is not adjustable, the feet are placed on the rear footrest of the front noon break chair or on the ground, so that the trouble of taking off the shoes is avoided. When the movable back piece is arranged, the movable back piece is locked on a proper position of the back frame combining piece by the clamping piece.

When the user lies down and resets to the seat, the clamping piece of the chair back component is loosened, the movable back piece is restored to the original position and then locked; when the chair back component is pushed forwards and the left and right tightening pieces retract to a certain position, the chair back component is pulled upwards by the left and right torsion springs and clamps the left and right positioning pieces again by the open slots of the left and right tightening pieces, and the chair back is locked at a sitting position to realize resetting.

And II, connecting the operation and action of the assembly II.

When the chair is in a sitting position, one end of the left and right tightening small rods is clamped in the left and right tightening structures respectively under the elastic force action of the left and right compression springs, and the chair back component is locked in the sitting position. The left and right pulling pieces are pulled outwards simultaneously to overcome the elasticity of the pressure spring, so that the left and right small tightening rods leave the left and right tightening structures, and the chair back component tilts backwards under the action of the self-gravity until the left and right limiting pieces lean against the left and right seat side pieces, and the chair back component is positioned in a lying position.

When the user lies down and resets to the seat, the chair back component is pushed forwards until one end of the left and right tightening small rods is pushed by the elasticity of the left and right compression springs respectively and clamped in the left and right tightening structures, so that the user lies down and resets to the seat.

In conclusion, the invention provides a connecting mechanism of a chair back and a chair seat of a student noon break chair, which is used for trying to develop a class of student noon break chairs suitable for being used in narrow and small occasions such as classrooms and all primary and secondary school students by adopting a plurality of methods for adjusting the angle of the chair back and arranging the angle-adjustable chair back on the basis of the existing student chairs which are accepted by the market and have adjustable chair seat heights; meanwhile, new products can be conveniently and quickly approved by the four groups of people, approval and development power of desk and chair production companies is easily obtained and excited, rapid and lasting popularization is achieved, hardware conditions are created for implementing sleep orders of education departments, appropriate and good noon break modes are provided for primary and secondary school students, and health, physical and mental development and learning efficiency of the students are further improved.

Drawings

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic left side view of a preferred embodiment of a mechanism for connecting the back and seat of a student's noon break chair;

fig. 2 is a schematic view of fig. 1 taken along direction a.

FIG. 3 is a schematic left side view of a preferred embodiment of a connecting assembly II of a connecting mechanism for a chair back and a chair seat of a student's noon break chair;

fig. 4 is a schematic view of fig. 3 in the direction B.

Detailed Description

Examples of the present invention are described in detail below with reference to the accompanying drawings.

See fig. 1 and 2. The first embodiment mainly comprises a chair back component 1, a chair seat component 2, a connecting component 3 and a limiting component 4, wherein the chair back component 1 mainly comprises a back side piece 1-1, a back cross piece 2-1 and a back piece 3-1 (shown by a double-dot line in figure 2), the back side piece 1-1 comprises a left back side piece Z-1-1 and a right back side piece Y-1-1, one end of the back cross piece 2-1 is fixedly connected with the left back side piece Z-1-1, the other end of the back cross piece 2-1 is fixedly connected with the right back side piece Y-1-1, the back cross piece 2-1, the left back side piece Z-1-1 and the right back side piece Y-1 form a back frame B-K, and the back piece 3-1 is connected to the back frame combining component B-K. The seat assembly 2 mainly comprises a seat side part 1-2, a seat cross part 2-2 (shown by a dotted line in figure 1) and a seat part 3-2 (shown by a double-dot chain line in figure 2), wherein the seat side part 1-2 comprises a left seat side part Z-1-2 and a right seat side part Y-1-2, one end of the seat cross part 2-2 is fixedly connected with the left seat side part Z-1-2, the other end of the seat cross part 2-2 is fixedly connected with the right seat side part Y-1-2, the left seat side part Z-1-2, the right seat side part Y-1-2 and the seat cross part 2-2 form a seat frame combining part Z-K, the seat part 3-2 is fixedly connected on the seat frame Z-K, the lower section of the left back side part Z-1-1 is rotatably connected with the rear end of the left seat side part Z-1-2, the lower section of the right back side part Y-1-1 is rotatably connected with the rear end of the right seat side part Y-1-2 And 4 limiting parts 4 are respectively fixedly connected to 2 back side parts 1-1 of the back frame combining part B-K and 2 seat side parts 1-2 of the seat frame combining part Z-K. The connecting assembly 3 is a connecting assembly I3-I, the connecting assembly I3-I mainly comprises a connecting piece I1-3-I, a fastening piece I2-3-I, an elastic piece I3-3-I (shown by a dotted line in figure 1) and a positioning piece I4-3-I, the elastic piece I3-3-I is a torsion spring N-3-I, the connecting assembly I3-I comprises a left connecting small assembly I Z-3-I and a right connecting small assembly I Y-3-I, the left connecting small assembly I Z-3-I mainly comprises a left connecting piece I1-Z-3-I, a left fastening piece I2-Z-3-I, a left elastic piece I3-Z-3-I and a left positioning piece I4-Z-3-I, the left elastic part I3-Z-3-I of the embodiment is a left torsion spring N-3-Z-3-I, the right connecting small component I Y-3-I mainly comprises a right connecting piece I1-Y-3-I, a right fastening piece I2-Y-3-I, a right elastic piece I3-Y-3-I and a right positioning piece I4-Y-3-I, the right elastic piece I3-Y-3-I of the embodiment is a right torsion spring N-3-Y-3-I, one end of the left fastening piece I2-Z-3-I and one end of the right fastening piece I2-Y-3-I are both provided with an open slot C, the lower ends of the left connecting piece I1-Z-3-I and the left back side piece Z-1-1 are fixedly connected, the left connecting piece I1-Z-3-I is rotatably connected with the left fastening piece I2-Z-3-I, the left positioning piece I4-Z-3-I is fixedly connected on the left seat side piece Z-1-2, the open slot C of the left fastening piece I2-Z-3-I can be connected with the left positioning piece I4-Z-3-I, one end of the left torsion spring N-3-Z-3-I is connected on the left fastening piece I2-Z-3-I, and the other end of the left torsion spring N-3-Z-3-I is connected on the left back side piece Z-1-1. The lower end of the right connecting piece I1-Y-3-I is fixedly connected with the lower end of the right back side piece Y-1-1, the right connecting piece I1-Y-3-I is rotatably connected with the right fastening piece I2-Y-3-I, the right positioning piece I4-Y-3-I is fixedly connected with the right seat side piece Y-1-2, an open slot C of the right fastening piece I2-Y-3-I can be connected with the right positioning piece I4-Y-3-I, one end of a right torsion spring N-3-Y-3-I is connected with the right fastening piece I2-Y-3-I, and the other end of the right torsion spring N-3-Y-3-I is connected with the right back side piece Y-1-1. One end of a transverse lifting rod H-G is connected to the left fastening piece I2-Z-3-I, and the other end of the transverse lifting rod H-G is connected to the right fastening piece I2-Y-3-I. (the two-dot chain line on the left side of FIG. 1 indicates a state where the seat back is lying down).

See fig. 3, 4. The connecting component 3 is a connecting component II 3-II, the connecting component II 3-II mainly comprises a fixed sleeve 1-3-II, a tightening small rod 2-3-II, a pressure spring 3-3-II, a pulling piece 4-3-II and a jacking structure 5-3-II, the connecting component II 3-II comprises a left connecting small component II Z-3-II and a right connecting small component II Y-3-II, the left connecting small component II Z-3-II mainly comprises a left fixed sleeve 1-Z-3-II, a left tightening small rod 2-Z-3-II, a left pressure spring 3-Z-3-II, a left pulling piece 4-Z-3-II and a left jacking structure 5-Z-3-II, the left fixed sleeve 1-Z-3-II is connected on the left back side part Z-1-1, the left fastening small rod 2-Z-3-II is movably connected with the left fixed sleeve 1-Z-3-II, the left pressure spring 3-Z-3-II is arranged between the left fixed sleeve 1-Z-3-II and the left fastening small rod 2-Z-3-II, one end of the left fastening small rod 2-Z-3-II is connected with a left pulling part 4-Z-3-II, a left jacking structure 5-Z-3-II is arranged on the left seat side part Z-1-2, the left jacking structure 5-Z-3-II can be connected with the left fastening small rod 2-Z-3-II, the left back side part Z-1-1 is rotatably connected with the left seat side part Z-1-2, and are provided with a one-piece stop 4. The right connecting small component II Y-3-II mainly comprises a right fixed sleeve 1-Y-3-II, a right fastening small rod 2-Y-3-II, a right pressure spring 3-Y-3-II, a right pulling piece 4-Y-3-II and a right jacking structure 5-Y-3-II, wherein the right fixed sleeve 1-Y-3-II is connected on the right back side piece Y-1-1, the right fastening small rod 2-Y-3-II is movably connected with the right fixed sleeve 1-Y-3-II, the right pressure spring 3-Y-3-II is arranged between the right fixed sleeve 1-Y-3-II and the right fastening small rod 2-Y-3-II, one end of the right fastening small rod 2-Y-3-II is connected with the right pulling piece 4-Y-3-II, the right jacking structure 5-Y-3-II is arranged on the right seat side part Y-1-2, and the right jacking structure 5-Y-3-II can be connected with the right tightening small rod 2-Y-3-II. The right back side part Y-1-1 is rotatably connected with the right seat side part Y-1-2, and both are provided with a limiting part 4.

With the above structure, the following operations and actions are described in the present example one and the present example two.

One, the operations and actions of example one.

When the chair is in a sitting position, the open slots C of the left and right fastening pieces I2-3-I are respectively clamped by the left and right positioning pieces I4-3-I under the elastic force of the left torsion spring N-3-Z-3-I and the right torsion spring N-3-Y-3-I, and the chair back component 1 is locked at the sitting position. The transverse lifting rod H-G is lifted to overcome the elasticity of the left torsion spring N-3-Z-3-I and the right torsion spring N-3-Y-3-I, the left and the right fastening pieces I2-3-I rotate downwards, after the open slot C is separated from the left and the right positioning pieces I4-3-I, the chair back component 1 tilts backwards under the action of self weight to drive the left and the right fastening pieces I2-3-I to extend forwards until the left and the right limiting pieces 4 lean against the left and the right seat side pieces 1-2, and the chair back component 2 is positioned in a lying position. When the chair is in the lying position, if the chair seat is adjustable, the chair seat is adjusted to the low position, then the chair is laid down, and the feet are placed on the ground or the rear foot rest of the front student noon break chair, so that the trouble of taking off shoes is avoided. If the chair seat is not adjustable, the feet are placed on the rear footrest of the front student noon break chair or on the ground, so that the trouble of taking off the shoes is avoided. When the movable back piece 3-1 is provided, it is locked in a proper position of the back frame engaging member B-K by the clamping member. When the user lies down and resets to the seat, the clamping piece of the chair back component 1 is loosened, the movable back piece 3-1 is restored to the original position and then locked; the chair back component 1 is pushed forwards, when the left and right tightening pieces I2-3-I retract to a certain position, the left and right tightening pieces I2-3-I are respectively pulled upwards by the elasticity of the left torsion spring N-3-Z-3-I and the right torsion spring N-3-Y-3-I, the open slot C of the left and right tightening pieces I2-3-I is clamped with the left and right positioning pieces I4-3-I again, and the chair back is locked at a sitting position to realize resetting.

Second, example two operations and actions.

When the chair is in a sitting position, under the elastic action of the left and right compression springs 3-3-II, one ends of the left and right tightening small rods 2-3-II are respectively clamped in the left and right tightening structures 5-3-II, and the chair back component 1 is locked in the sitting position. The left and right pulling parts 4-3-II are pulled outwards to overcome the elasticity of the left and right pressing springs 3-3-II, so that the left and right small tightening rods 2-3-II are away from the left and right holding structures 5-3-II, the chair back component 1 tilts backwards under the action of dead weight until the left and right limiting parts 4 lean against the left and right seat side parts 1-2, and the chair back component 1 is positioned in a lying position. When the user lies down and resets to the seat, the chair back component is pushed forwards until one end of the left and right tightening small rods is respectively pushed by the left and right compression springs and clamped in the left and right tightening structures again, and the reset from the lying position to the seat is realized.

In conclusion, the invention provides a connecting mechanism of a chair back and a chair seat of a student noon break chair, which is used for trying to develop the student noon break chair suitable for narrow and small occasions such as classrooms and all primary and secondary school students by adopting a plurality of methods for adjusting the angle of the chair back and arranging the angle-adjustable chair back on the basis of the existing student chair with the adjustable chair seat of the student chair accepted by the market and the like, and has the advantages of simple structure, convenient operation and capability of meeting the requirements of safety, reliability and popularization price; meanwhile, the novel product can quickly obtain the recognition of the four groups of people, the recognition and development power of desk and chair production companies is easily excited, the rapid and lasting popularization is achieved, hardware conditions are created for implementing sleep orders of education departments, appropriate and good conditions are created for middle and primary school students in noon break, and the health, the physical and mental development and the learning efficiency of the students are further improved.