CN217959243U - Noon break tablet chair that multi freedom was adjusted - Google Patents

Abstract

The utility model discloses a noon break tablet chair that multi freedom was adjusted mainly includes foot rest, bedplate skeleton, bedplate, back skeleton, backplate, headrest and leg support mechanism. Technical scheme's noon break tablet chair that multi freedom was adjusted more than adopting, leg holds in the palm mechanism and only is equipped with a leg and holds in the palm the telescopic link, and set up two leg layer boards in the both sides that the telescopic link was held in the palm to the leg, simultaneously through inside and outside ring channel and the spacing arch of leg support on the stopper cooperation leg layer board carry on spacingly and support to the leg layer board, not only the installation space that the leg held in the palm the telescopic link occupies very little, thereby make two leg layer boards size bigger, the use impression of the student of big check has been promoted, and after long-term use, even the push-and-pull of leg support telescopic link is not in the same direction as smooth inadequately, because do not have the mutual influence of other structures, influence to the push-and-pull resistance is less, can not arouse the leg to hold in the palm the condition of being difficult to open or accomodate.

Description

Noon break tablet chair that multi freedom was adjusted

Technical Field

The utility model relates to a seat technical field, concretely relates to noon break tablet chair that multi freedom was adjusted.

Background

At present, for wide primary and secondary school students, the students have meals in schools at noon. In order to ensure that the students can have full energy in class in the afternoon, most students can lie on the desk for afternoon nap after lunch.

For the students of teenagers, the development of the spine can be influenced because the development of the spine of the students of the teenagers is not perfect like that of adults, the cervical vertebra and the lumbar vertebra are both bent normally, and if the students lie on the back for sleeping for a long time, the normal physiological bending of the cervical vertebra and the lumbar vertebra can be changed, and cervical spondylosis or lumbar spondylosis appear prematurely; when people sleep on a table often, elbows of both hands are in a pressed state, blood circulation is influenced by long-term hand pressing, and numbness and stiffness of hands can be caused; and the sleeping state can be influenced when the user sleeps on the lying desk, and the sleeping quality can be influenced because of incorrect postures and body positions, so that the user feels dizzy and hypodynamia after waking up.

Therefore, a noon break tablet chair is produced in the market, and students can lie down to sleep by changing postures. But present lunch break class chair leg holds in palm the structure not only complicacy, and the leg holds in the palm the support in addition is rectangular frame structure usually, and not only installation space occupies greatly, leads to the leg layer board littleer, uses the impression not good to the great student of physique, and after long-term the use, when two telescopic links of leg support all not in the same direction as smooth, two telescopic links influence each other, and push-and-pull resistance is very big, leads to the leg to hold in the palm and is difficult to open or accomodate.

It is urgent to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a multi-freedom-degree adjustable lunch break tablet chair.

The technical scheme is as follows:

a noon break tablet chair that multi freedom was adjusted includes:

the foot rest can be adjusted in a lifting way through the foot rest adjusting assembly;

the seat plate framework is fixedly arranged at the top of the foot rest;

the seat plate is fixedly arranged at the top of the seat plate framework;

the backrest locking assembly is arranged at the rear end of the seat plate framework and locks the relative positions of the backrest framework and the seat plate framework;

a back plate fixedly mounted on a front side of the back frame;

the headrest is arranged on the top of the back plate in a lifting and adjusting manner through the headrest adjusting assembly;

the leg support mechanism comprises a leg support telescopic sleeve fixedly mounted below a seat frame through a sleeve support, a leg support telescopic rod capable of sliding back and forth along the leg support telescopic sleeve, an inner plug and an outer plug fixedly mounted at the front end of the leg support telescopic rod, a leg support rotating shaft rotatably mounted on the inner plug and the outer plug in a manner of extending towards the left side and the right side of the leg support telescopic rod, and two leg support plates synchronously rotatably sleeved on the leg support rotating shaft.

Compared with the prior art, the beneficial effects of the utility model are that:

technical scheme's noon break tablet chair that multi freedom was adjusted more than adopting, leg holds in palm mechanism and only is equipped with a leg and holds in the palm the telescopic link, and set up two leg layer boards in the both sides that the telescopic link was held in the palm to the leg, simultaneously through inside and outside ring channel on the stopper cooperation leg layer board with the leg hold in the palm spacing arch carry on spacingly and support the leg layer board, not only the mounting space that the leg held in the palm the telescopic link occupies very little, thereby make two leg layer boards size bigger, the use impression of the student of big check has been promoted, and after long-term the use, even the push-and-pull that the leg held in the palm the telescopic link is in the same direction as not smooth enough, because there is not the mutual influence of other structures, influence to the push-pull resistance is less, can not arouse the leg to hold in the palm the condition that is difficult to open or accomodate.

Drawings

FIG. 1 is a schematic view of a lunch break tablet chair;

FIG. 2 is a schematic view of the fitting relationship of the seat plate frame, the backrest frame and the leg rest mechanism;

FIG. 3 is a schematic view of the stand adjustment assembly;

FIG. 4 is a schematic view of the backrest locking assembly;

FIG. 5 is a schematic view of the backrest latch assembly shown from a perspective with the latch housing removed;

FIG. 6 is a schematic view of the backrest latch assembly from another perspective with the latch housing removed;

FIG. 7 is a schematic view of the structure of the fixing plate;

FIG. 8 is a schematic view of the structure of the movable plate;

FIG. 9 is a schematic structural diagram of a back plate;

FIG. 10 is a schematic view of the inner and outer plugs;

FIG. 11 is a schematic view of a leg rest;

fig. 12 is a schematic view of the cooperative relationship of the headrest and the headrest adjustment assembly.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

As shown in fig. 1 and 2, the multi-degree-of-freedom adjustable noon break tablet chair mainly comprises foot rests 1, a seat plate framework 2, a seat plate 3, a backrest framework 4, a back plate 5, a headrest 6 and a leg support mechanism 7.

Wherein, foot rest 1 can carry out lift adjustment through foot rest adjusting part, and bedplate skeleton fixed mounting is at the top of foot rest 1, and bedplate 3 fixed mounting is at the top of bedplate skeleton 2 to can adjust the height of bedplate 3 through foot rest adjusting part. The backrest framework 4 is arranged at the rear end of the seat framework 2 through a backrest locking assembly, and the back plate 5 is fixedly arranged at the front side of the backrest framework 4; when the backrest locking assembly is in an unlocked state, the backrest framework 4 can rotate relative to the seat plate framework 2, so that the angle of the back plate 5 can be adjusted; when the backrest locking assembly is in the locked state, the backrest locking assembly locks the relative positions of the backrest frame 4 and the seat plate frame 2. The headrest 6 is liftably and adjustably mounted on the top of the backboard 5 by a headrest adjusting assembly, so that the height of the headrest 6 can be adjusted by the headrest adjusting assembly.

Referring to fig. 1, 2, 10 and 11, the leg support mechanism 7 includes a leg support telescopic sleeve 7b fixedly mounted below the seat frame 2 through a sleeve support 7a, a leg support telescopic rod 7c capable of sliding back and forth along the leg support telescopic sleeve 7b, an inner plug 7d fixedly mounted at the front end of the leg support telescopic rod 7c, a leg support rotating shaft 7e rotatably mounted on the inner plug 7d in a manner of extending to the left and right sides of the leg support telescopic rod 7c, and two leg support plates 7f synchronously rotatably mounted on the leg support rotating shaft 7e, wherein the two leg support plates 7f are respectively located at the left and right sides of the inner plug 7d, one side of the leg support plate 7f close to the inner plug 7d is recessed to form an annular groove 7f1 surrounding the leg support rotating shaft 7e, an end leg support limiting protrusion 7f2 is arranged in the annular groove 7f1, the left and right sides of the inner plug 7d are respectively projected to form a rotating limiting protrusion 7d1 matched with the annular groove 7f1 and the leg support limiting protrusion 7f2, and the two rotating limiting protrusions are respectively inserted into the adjacent annular grooves 7f 1.

Therefore, when the two leg rest plates 7f are in the accommodated state rearward in the horizontal direction, one end surfaces of the two leg rest limit projections 7f2 are respectively supported on one end surfaces of the adjacent rotation limit projections 7d1, and when the two leg rest plates 7f are in the opened state forward in the horizontal direction, the other end surfaces of the two leg rest limit projections 7f2 are respectively supported on the other end surfaces of the adjacent rotation limit projections 7d 1. In this embodiment, the rotation limiting protrusion 7d1 is vertically arranged at the rear side of the leg support rotating shaft 7 e; therefore, when the leg rest 7f is rotated first upward and then rearward, the leg rest restriction projection 7f2 is supported on the upper end surface of the rotation restriction projection 7d1, so that the leg rest 7f is in a rearward housed state; when the leg rest 7f is rotated first upward and then forward, the leg rest limit projection 7f2 is supported on the lower end surface of the rotation limit projection 7d1, so that the leg rest 7f is in a forward open state.

Referring to fig. 1-3, a foot rest 1 includes two foot rest lower bent tubes 1a of an "L" shape and two foot rest upper straight tubes 1b sliding up and down along the upper ends of the adjacent foot rest lower bent tubes 1a, respectively, a lower bent tube reinforcing tube 1c extending to the left and right sides is connected between the two foot rest lower bent tubes 1a, an upper straight tube reinforcing tube 1d extending to the left and right sides is connected between the two foot rest upper straight tubes 1b, a foot rest adjusting component includes a lifting driving rod 8, a crank 9, two lead screws 10, two nuts 11 and two bevel gear positioning housings 12, the two bevel gear positioning housings 12 are fixedly installed in the corresponding foot rest upper straight tubes 1b and located at the two ends of the upper straight tube reinforcing tube 1d, respectively, the lifting driving rod 8 is rotatably installed in the upper straight tube reinforcing tube 1d, and both ends insert the correspondent bevel gear locating shell 12 separately and then is fitted with the drive bevel gear 13 synchronously and rotatably, wherein one end of the lifting drive bar 8 is fitted with the crank 9 synchronously and rotatably after outwardly piercing the bevel gear locating shell 12 and foot rest upper straight tube 1b sequentially, two lead screws 10 are located two groups of foot rest lower bend 1a and foot rest upper straight tube 1b separately, two nuts 11 are fixedly mounted on the upper end of the corresponding foot rest lower bend 1a separately, and fit over the correspondent lead screw 10 separately, thus form the nut kinematic pair of the lead screw with the correspondent lead screw 10 separately, the upper end of two lead screws 10 is fitted with the driven bevel gear 14 engaging with correspondent drive bevel gear 13 synchronously and rotatably after inserting the correspondent bevel gear locating shell 12 separately.

Therefore, by rotating the crank handle 9, the two driving bevel gears 13 on the lifting driving rod 8 are driven to synchronously rotate through the lifting driving rod 8, the two driving bevel gears 13 respectively drive the corresponding driven bevel gears 14 to rotate, and the two driven bevel gears 14 respectively drive the corresponding screw rods 10 to rotate, so that the two screw rods 10 simultaneously lift relative to the corresponding nuts 11, the height of the straight pipe 1b on the foot stool is adjusted, and the method is simple, reliable and easy to assemble.

In this embodiment, anti-skidding support piece 1g is all installed at the both ends of the horizontal pipe part of foot rest lower elbow 1a bottom to can guarantee the steady of noon break tablet chair, anti-skidding abnormal sound. And the nuts 11 are made of plastic materials and are respectively fixed at the upper ends of the corresponding foot rest lower bent pipes 1a through screws, so that the foot rest lower bent pipe is simple and reliable and is easy to manufacture and assemble.

Referring to fig. 1 and 2, the seat plate framework 2 includes two seat plate support pipes 2a extending in the front-back direction and two seat plate connection pipes 2b connected between the two seat plate support pipes 2a, the two seat plate connection pipes 2b are arranged in the front-back direction, an intermediate connection pipe 2c extending in the front-back direction is connected to the middle position of the two seat plate connection pipes 2b, and the sleeve support 7a is fixedly mounted at the bottom of the front end of the intermediate connection pipe 2c, so that the structural strength of mounting the seat plate 3 is ensured, and the mounting of the leg support mechanism 7 is facilitated. The backrest framework 4 comprises two backrest support pipes 4a which are vertically arranged, and the two backrest support pipes 4a are respectively in one-to-one correspondence with the two seat plate support pipes 2a so as to be convenient for installing the backrest locking assembly.

Referring to fig. 2 and 4-8, the backrest locking assembly includes a rotation control rod 15, two fixed disks 16 respectively and fixedly installed at the rear end of the corresponding seat plate support tube 2a, two movable disks 17 respectively and fixedly installed at the lower end of the corresponding backrest support tube 4a, the two movable disks 17 are respectively and rotatably installed at one side of the corresponding fixed disk 16 through lock pins 21, and two sets of the fixed disks 16 and the movable disks 17 are both installed in a locking piece housing 18, the movable disks 17 are both provided with first arc-shaped holes 17a and second arc-shaped holes 17b extending along the circumferential direction of the movable disks 17, one end of each second arc-shaped hole 17b extends outward along the radial direction of the movable disk 17 to form a locking bayonet 17c, the fixed disks 16 are both provided with bar-shaped matching holes 16a matching with the locking bayonet 17c and control rod through holes 16b matching with the rotation control rod 15, both ends of the rotation control rod 15 respectively pass through the two sets of the control rod through the first arc-shaped holes 16b and the first arc-shaped holes 17a, both ends of the rotation control rod 15 are both synchronously and rotatably sleeved with first connecting rods 19, one end of the two ends of the rotation control rod 15 are respectively hinged with the lock pins 21, and one end of the locking rod 17b, one end of the locking rod 17 is connected with the locking piece housing 18.

Therefore, when the backrest frame 4 is in the vertical state, the strip-shaped matching holes 16a are opposite to the locking bayonets 17c, the locking pressing handle 22 is rotated towards one direction, the two locking pins 21 can be simultaneously clamped into the corresponding locking bayonets 17c, so that the relative positions of the two groups of fixed disks 16 and the movable disks 17 are locked, the back plate 5 is in the vertical state, and the noon break class chair is in the class listening use state. When the handle 22 is pressed in the locking of rotating towards another direction, two lockpins 21 slide in corresponding second arc hole 17b simultaneously, thereby unblock two sets of fixed disks 16 and the relative position of activity dish 17, two lockpins 21 can slide along corresponding second arc hole 17b respectively, rotate control lever 15 simultaneously and can slide along two first arc holes 17a, thereby make backplate 5 can rotate down to noon break in user state, at this moment, two lockpins 21 keep away from the one end butt of locking bayonet socket 17c with corresponding second arc hole 17b respectively. The whole structure is simple and reliable, the operation is easy, and the safety is high.

Referring to fig. 1, 9 and 12, a vertically extending headrest rod slot 5a is formed in a recessed manner in the top of the back plate 5, at least one row of vertically extending height adjustment holes 5b are formed in a rear side wall of the headrest rod slot 5a, the headrest adjustment assembly includes a headrest rod 6a integrally formed at the bottom of the headrest 6 and at least one elastic protrusion 6b elastically installed at the lower end of the headrest rod 6a, the headrest rod 6a is adapted to the headrest rod slot 5a, each elastic protrusion 6b is adapted to each row of height adjustment holes 5b, and after the headrest rod 6a is inserted into the headrest rod slot 5a, each elastic protrusion 6b can be respectively clamped into any height adjustment hole 5b in the corresponding row of height adjustment holes 5b, so that the height of the headrest 6 can be easily adjusted to adapt to students with different heights. It is to be noted that the elastic projections 6b are mounted on the headrest bars 6a via elastic members, and the application of a large force to pull or press the headrest bars 6a enables the respective elastic projections 6b to exit the height adjustment holes 5b.

Referring to fig. 1, the seat plate 3, the back plate 5 and the two leg supporting plates 7f are integrally formed by plastic materials, and the seat plate 3, the back plate 5 and the two leg supporting plates 7f are respectively provided with a plurality of strip-shaped air holes, so that the air-permeable and comfortable seat plate not only can meet the requirement of light weight design.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims (7)

1. A noon break tablet chair that multi freedom was adjusted includes:

a foot rest (1) which can be adjusted by lifting through a foot rest adjusting assembly;

the seat plate framework (2) is fixedly arranged at the top of the foot rest (1);

a seat plate (3) fixedly mounted on the top of the seat plate framework (2);

the backrest locking assembly is arranged at the rear end of the seat plate framework (2), the backrest framework (4) can rotate relative to the seat plate framework (2) when the backrest locking assembly is in an unlocking state, and the backrest locking assembly locks the relative positions of the backrest framework (4) and the seat plate framework (2) when the backrest locking assembly is in a locking state;

a back plate (5) fixedly mounted on the front side of the backrest frame (4);

a headrest (6) which is installed on the top of the back plate (5) in a lifting and adjusting way through a headrest adjusting component;

characterized in that the leg support mechanism (7) comprises a leg support telescopic sleeve (7 b) fixedly arranged below the seat plate framework (2) through a sleeve bracket (7 a), a leg support telescopic rod (7 c) capable of sliding back and forth along the leg support telescopic sleeve (7 b), an inner plug and an outer plug (7 d) fixedly arranged at the front end of the leg support telescopic rod (7 c), a leg support rotating shaft (7 e) rotatably arranged on the inner plug and the outer plug (7 d) in a manner of extending towards the left side and the right side of the leg support telescopic rod (7 c) and two leg support plates (7 f) synchronously rotatably sleeved on the leg support rotating shaft (7 e), wherein the two leg support plates (7 f) are respectively positioned at the left side and the right side of the inner plug and the outer plug (7 d), and one side of the leg supporting plate (7 f) close to the inner plug (7 d) and one side of the leg supporting plate (7 f) close to the outer plug (7 d) are both concavely provided with annular grooves (7 f 1) surrounding the leg support rotating shafts (7 e), the annular grooves (7 f 1) are respectively provided with an end leg support limiting bulge (7 f 2), the left side and the right side of the inner plug (7 d) are respectively convexly provided with a rotating limiting bulge (7 d 1) matched with the annular grooves (7 f 1) and the leg support limiting bulges (7 f 2), the two rotating limiting bulges (7 d 1) are respectively and slidably inserted into the adjacent annular grooves (7 f 1), when the two leg supporting plates (7 f) are in a backward accommodating state along the horizontal direction, one end faces of the two leg support limiting bulges (7 f 2) are respectively supported on one end faces of the adjacent rotating limiting bulges (7 d 1), when the two leg supporting plates (7 f) are in a forward opening state along the horizontal direction, the end surfaces of the other ends of the two leg support limiting bulges (7 f 2) are respectively supported on the end surfaces of the other ends of the adjacent rotation limiting bulges (7 d 1).

2. The noon break tablet chair of multi freedom regulation of claim 1, characterized in that: the foot stool (1) comprises two foot stool lower bent tubes (1 a) which are oppositely arranged and have an L-shaped structure and two foot stool upper straight tubes (1 b) which respectively slide up and down along the upper ends of the adjacent foot stool lower bent tubes (1 a), a lower bent tube reinforcing tube (1 c) which extends towards the left side and the right side is connected between the two foot stool lower bent tubes (1 a), an upper straight tube reinforcing tube (1 d) which extends towards the left side and the right side is connected between the two foot stool upper straight tubes (1 b), the foot stool adjusting component comprises a lifting driving rod (8), a crank (9), two screw rods (10), two nuts (11) and two bevel gear positioning shells (12), the two bevel gear positioning shells (12) are respectively and fixedly arranged in the corresponding foot stool upper straight tubes (1 b) and are respectively arranged at the two ends of the upper straight tube reinforcing tube (1 d), the lifting driving gear (13) is rotatably arranged in the upper straight tube reinforcing tube (1 d) and is sleeved in the bevel gear positioning shell (12) in a synchronous rotating manner after the two ends of the corresponding bevel gear positioning shells (12) are respectively inserted into the corresponding bevel gear positioning shells, one end of the lifting driving rod (8) penetrates out of the two groups of the lifting rod (1 a) and the two groups of the upper straight tube (1 b), and the two sets of the two bevel gears (1 b) are respectively and the two bevel gears (9) are respectively and are respectively sleeved in the two bevel gears (10), and are respectively sleeved on the corresponding screw rods (10) so as to form screw-nut kinematic pairs with the corresponding screw rods (10), and the upper ends of the two screw rods (10) are respectively inserted into the corresponding bevel gear positioning shells (12) and then are synchronously and rotatably sleeved with driven bevel gears (14) meshed with the corresponding driving bevel gears (13).

3. The multi-degree-of-freedom adjustable noon break tablet chair as claimed in claim 2, wherein: the nuts (11) are made of plastic materials and are fixed at the upper ends of the corresponding foot rest lower bent pipes (1 a) through screws respectively.

4. The multi-degree-of-freedom adjustable noon break tablet chair as claimed in claim 1, wherein: bedplate skeleton (2) include two bedplate stay tubes (2 a) that extend along the fore-and-aft direction and two bedplate connecting pipes (2 b) of connecting between two bedplate stay tubes (2 a), and two bedplate connecting pipes (2 b) are arranged along the fore-and-aft direction to be connected with intermediate junction pipe (2 c) that extend along the fore-and-aft direction in the intermediate position of two bedplate connecting pipes (2 b), sleeve holder (7 a) fixed mounting is in the bottom of intermediate junction pipe (2 c) front end.

5. The noon break tablet chair of claim 4, wherein the multi freedom is adjusted, characterized in that: the backrest frame (4) comprises two vertically arranged backrest support pipes (4 a), the backrest locking assembly comprises a rotating control rod (15), two fixed disks (16) fixedly arranged at the rear end parts of the corresponding seat plate support pipes (2 a) respectively, two movable disks (17) fixedly arranged at the lower end parts of the corresponding backrest support pipes (4 a) respectively, the two movable disks (17) are rotatably arranged at one side of the corresponding fixed disk (16) respectively through lock pins (21), the two groups of fixed disks (16) and the two groups of movable disks (17) are both arranged in a locking piece shell (18), the movable disk (17) is provided with a first arc-shaped hole (17 a) and a second arc-shaped hole (17 b) which extend along the circumferential direction of the movable disk (17), one end of the second arc-shaped hole (17 b) extends outwards along the radial direction of the movable disk (17) to form a locking bayonet (17 c), the fixed disk (16) is provided with a bar-shaped matching hole (16 a) matched with the locking bayonet (17 c) and a rotating control rod (16 b) matched with the rotating control rod (15), the two groups of rotating control rods (19) pass through the first control rod (15 a) and the two groups of rotating control rod (19) respectively, and the two groups of rotating control rod (19) are both ends of the two groups of rotating control rod (15 a) are hinged with the first control rod (15) respectively, one ends, far away from the adjacent first connecting rods (19), of the two second connecting rods (20) are connected with lock pins (21), the lock pins (21) are in sliding fit with a group of corresponding second arc-shaped holes (17 b), locking bayonets (17 c) and strip-shaped matching holes (16 a), and one end of the rotating control rod (15) penetrates through the locking piece shell (18) and then is sleeved with a locking pressing handle (22) in a synchronous rotating mode;

when the backrest framework (4) is in a vertical state, the locking pressing handle (22) is rotated towards one direction, two lock pins (21) can be simultaneously clamped into corresponding locking bayonets (17 c), and therefore the relative positions of the two groups of fixed discs (16) and the movable discs (17) are locked; when the locking pressing handle (22) is rotated towards the other direction, the two lock pins (21) slide into the corresponding second arc-shaped holes (17 b) simultaneously, so that the relative positions of the two groups of fixed discs (16) and the movable disc (17) are unlocked, the two lock pins (21) can slide along the corresponding second arc-shaped holes (17 b) respectively, and the control rod (15) can slide along the two first arc-shaped holes (17 a) simultaneously.

6. The multi-degree-of-freedom adjustable noon break tablet chair as claimed in claim 1, wherein: the top of backplate (5) is sunken to be formed with headrest pole slot (5 a) of vertical extension, at least one row of vertical extension's altitude mixture control hole (5 b) has been seted up on the rear side cell wall of headrest pole slot (5 a), headrest adjusting part includes that integrated into one piece installs in headrest pole (6 a) of headrest pole (6) bottom and at least one elasticity arch (6 b) of headrest pole (6 a) lower extreme elastically, headrest pole (6 a) and headrest pole slot (5 a) looks adaptation, each elasticity arch (6 b) respectively with each row of altitude mixture control hole (5 b) looks adaptation, behind headrest pole (6 a) inserted headrest pole slot (5 a) slot, each elasticity arch (6 b) can block into arbitrary altitude mixture control hole (5 b) in corresponding one row of altitude mixture control hole (5 b) respectively.

7. The noon break tablet chair of multi freedom regulation of claim 1, characterized in that: bedplate (3), backplate (5) and two leg layer boards (7 f) all adopt plastics material integrated into one piece, and equally divide on bedplate (3), backplate (5) and two leg layer boards (7 f) and do not have a plurality of bar bleeder vents.

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