CN213524533U - Leisure chair and chair tray thereof - Google Patents

Abstract

A leisure chair and a chair tray thereof comprise a base, a chair back fixing seat, a sitting stool mounting seat and a connecting seat, wherein the connecting seat and the chair back fixing seat are respectively hinged with the front part and the rear part of the base; the base comprises two base side parts and a middle part connected with the two base side parts, the two base side parts and the middle part form a mounting cavity, and a torsion spring for providing a resetting force required by the resetting of the chair back fixing seat is arranged in the mounting cavity; the tray also comprises a gear adjusting rod inserted on the base, and the gear adjusting rod allows the chair back fixing seat to overcome torsion of a torsion spring to drive the chair back to rotate backwards in the process of adjusting the inclination angle of the chair back fixing seat by matching with the chair back inclining gear adjusting area. The utility model discloses, compromise back of the chair angle and set efficiency and manufacturing cost.

Description

Leisure chair and chair tray thereof

Technical Field

The utility model relates to a chair field especially relates to a leisure chair and chair tray thereof.

Background

At present, the adjustment of the chair back angle, namely the gear adjustment, basically depends on a rotary connecting structure and a locking mechanism between a tray for fixing a chair base and a chair back fixing frame for fixing the chair back to realize the functions of lying down the chair back and adjusting the inclination angle of the chair back, a torsion spring is usually arranged on a rotating shaft of the chair back fixing frame, and generates a certain rebound torque in the rotating process, so that a user can support a certain back in the lying down process, and the torsion spring can also enable the chair back to automatically recover the vertical state after the locking mechanism is loosened; the locking mechanism generally comprises a locking rod and a fitting piece matched with the locking rod, wherein the locking rod laterally penetrates through the tray, and the fitting piece is arranged on the side surface of the tray. In order to conveniently and quickly lock the chair back through the locking mechanism after the chair back rotates to a proper angle, the positioning requirement of the rotating connection structure after the rotating connection structure rotates to the proper position is high because: once rotated in place, if the rotating connection structure is deflected back and forth, it is difficult to lock the rotating connection structure, and accordingly, the complexity of the rotating connection structure is increased, and the production cost of the whole tray and chair is high.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a free chair and a chair tray for taking account of the chair back angle setting efficiency and the production cost, the chair back tilting gear setting area and the gear setting rod are matched to set the inclination angle of the chair back fixing seat, the chair back fixing seat is allowed to overcome the torsion of the torsion spring to drive the chair back to rotate backwards, the backward rotation angle of the chair back is not required to be too accurate, only an approximate angle range is needed, the chair back fixing seat inclination angle can be allowed to be matched with the gear setting rod to set, the adjustment of the chair back angle is more flexible and convenient, the chair back angle setting efficiency is ensured, the structural part of the chair back fixing seat is utilized to be matched with the gear setting rod to set the inclination angle of the chair back fixing seat, no additional design and no independent part matched with the gear setting rod are needed, the whole structure is simpler, the production cost is greatly reduced, and the tray with the same function is compared with the tray, the selling price can be greatly reduced.

The chair tray comprises a base, a chair back fixing seat, a chair seat mounting seat and a connecting seat, wherein the connecting seat and the chair back fixing seat are respectively hinged with the front part and the rear part of the base; the base comprises two base side parts and a middle part connected with the two base side parts, the two base side parts and the middle part form an installation cavity, and a torsion spring used for providing a resetting force required by the resetting of the chair back fixing seat is arranged in the installation cavity; the tray comprises a base, a chair back fixing seat and a tray, wherein the side wall of the chair back fixing seat is provided with a chair back inclining and lying gear adjusting area, the tray further comprises a gear adjusting rod inserted on the base, and the gear adjusting rod is matched with the chair back inclining and lying gear adjusting area to adjust the inclination angle of the chair back fixing seat, so that the chair back fixing seat is allowed to overcome torsion of a torsion spring to drive the chair back to rotate backwards.

According to the chair back inclination adjusting device, the chair back fixing seat is allowed to overcome torsion of a torsion spring to drive the chair back to rotate backwards in the process that the chair back inclination adjusting area and the gear adjusting rod are matched to adjust the inclination angle of the chair back fixing seat, so that the backward rotation angle of the chair back does not need to be too accurate, the chair back fixing seat can be allowed to be matched with the gear adjusting rod to adjust the inclination angle of the chair back fixing seat only within an approximate angle range, the adjustment of the chair back angle is more flexible and convenient, the chair back angle adjusting efficiency is ensured, the inclination angle of the chair back fixing seat is adjusted by utilizing the structural part of the chair back fixing seat to be matched with the gear adjusting rod, and an additional design of a separate part matched with the gear adjusting rod is not needed, so that the whole structure is simpler, the production cost is greatly reduced, and the; simultaneously, this tray, back of the chair fixing base is used for installing the back of the chair, sit the bench mount pad and be used for installing the cushion, the base is used for connecting on the chair foot, this tray, human back naturally exerts the back pressure in the back of the chair when according to the chair human body to lie down, overcome the torsion that resets of torsional spring and exert by the buttock and take for back of the chair fixing base pivoted rotation drive moment of torsion forward by sitting the sitting pressure of bench mount pad, self-adaptively obtain the best back of the chair inclination that is suitable for the user, simultaneously, the buttock has ensured the elasticity of back of the chair fixing base and the back of the chair to the sitting pressure of sitting the bench mount pad is automatic, the required different comfort level of fine automatic matching everyone, the regulation of having.

Preferably, the side wall of the chair back fixing seat is also provided with a chair back initial gear adjusting area which can be matched with the gear adjusting rod to adjust the initial inclination angle of the chair back fixing seat. The chair back fixing seat and the chair back can obtain the most basic two-gear adjustment by designing a chair back initial gear adjusting area and a chair back inclining gear adjusting area on the side part of the base to be matched with the gear adjusting rod to adjust the inclination angles of the chair back fixing seat and the chair back.

Preferably, the backrest reclining gear setting area is provided with a front rotation stopping surface. The front rotation stopping surface is arranged in the chair back inclining gear setting area and the gear setting rod is matched with the chair back fixing seat to set the inclination angle of the chair back fixing seat, the chair back fixing seat is forbidden to drive the chair back to rotate forwards, the chair back fixing seat is allowed to overcome the torsion of a torsion spring to drive the chair back to rotate backwards, and the comfort degree required by each person is well and automatically matched.

Preferably, the chair back initial gear setting area is provided with a lock hole. The user can adjust the inclination angle of the chair back fixing seat by inserting the gear adjusting rod into the lock hole.

Preferably, the chair back initial gear setting area is provided with a rear rotation stopping surface. A user can adjust the chair back fixing seat and the chair back inclination angle through the cooperation of the backward rotation stopping surface and the gear adjusting rod, and after the adjustment, the chair back fixing seat is forbidden to drive the chair back to rotate backward, namely, under the initial gear, the back of a human body leans against the chair back, and the chair back cannot rotate backward.

Preferably, the seat mounting seat is provided with a forward rotation limiting part. Through the forward-rotating limiting part, the seat pressure generated by the buttocks to the seat stool mounting seat when a human body sits on the seat cushion can be prevented from urging the seat back fixing seat to rotate forwards excessively to cause damage or failure of the torsion spring.

Preferably, the forward-rotation limiting part is abutted against the chair back fixing seat when the chair back initial gear adjusting area and the gear adjusting rod are matched to adjust the inclination angle of the chair back fixing seat. That is to say, when the chair back fixing seat rotates under the action of the torsion spring and contacts with the forward rotation limiting part, the inclination angle position of the chair back fixing seat is just the chair back initial gear setting area and the gear setting rod are matched to set the chair back fixing seat inclination angle required by the chair back fixing seat, so that a user can find the lock hole or the backward rotation stop surface quickly, and the gear setting of the chair back fixing seat and the chair back is realized quickly.

Preferably, the chair back fixing seat is hinged to the base through a first hinge shaft penetrating through two side parts of the base, and the torsion spring is sleeved on the first hinge shaft. And the torsional spring is limited on the first hinge shaft connecting the chair back fixing seat and the base, so that the working effect of the torsional spring is ensured.

Preferably, the gear adjusting lever further comprises a locking structure for adjusting the gear adjusting lever. The locking structure locks the gear adjusting rod after the gear adjusting rod is matched with the chair back initial gear adjusting area or the chair back inclining gear adjusting area to adjust the inclination angle of the chair back fixing seat, so as to keep the inclination angles of the chair back fixing seat and the chair back.

Preferably, the locking structure comprises a positioning part, a ball locking head and a mounting sleeve, wherein the positioning part is positioned on the gear setting rod and is provided with a first positioning locking groove and a second positioning locking groove, the ball locking head is used for being matched and locked with the first positioning locking groove or the second positioning locking groove, the compression spring is used for acting with the ball locking head, the mounting sleeve is arranged in the mounting cavity and is provided with a mounting groove, the compression spring and the ball locking head are limited in the mounting groove, and the ball locking head is partially exposed out of the mounting groove. Advance to the back of the chair initial gear setting district or the back of the chair when inclining the gear setting district at the gear setting pole, the lock bulb enters into location locked groove one under compression spring's elastic action, with the gear setting pole locking, the user feels the pause of feeling in the twinkling of an eye that the lock bulb was popped into location locked groove one simultaneously and feels and play the effect that the warning gear setting pole impeld the target in place for the user, be favorable to the quick adjustment back of the chair to incline the angle of lying, and when the gear setting pole was extracted, location locked groove two and lock bulb cooperation effect, prescribe a limit to a fixed position with the gear setting pole, it can not be accomplished and extract.

Preferably, an installation lining plate for installing the installation sleeve is arranged in the installation cavity, the installation cavity is a through cavity, and the compression spring extends out of the through cavity and abuts against the middle part.

A leisure chair comprises the chair tray in the technical scheme.

To sum up, the utility model discloses following beneficial effect has:

1: the chair back tilting gear setting area and the gear setting rod are matched to set the inclination angle of the chair back fixing seat, the chair back fixing seat is allowed to overcome torsion of a torsion spring to drive the chair back to rotate backwards, the backward rotation angle of the chair back does not need to be too accurate, only an approximate angle range is needed, the adjustment of the inclination angle of the chair back fixing seat matched with the gear setting rod can be allowed, the adjustment of the angle of the chair back is more flexible and convenient, the adjustment efficiency of the angle of the chair back is ensured, the inclination angle of the chair back fixing seat is adjusted by utilizing the structural part of the chair back fixing seat to be matched with the gear setting rod, and an additional design and a separate part matched with the gear setting rod are not needed, so that the whole structure is simpler, the production cost is greatly reduced, and the selling price is greatly reduced compared with a; meanwhile, the tray is characterized in that the chair back fixing seat is used for installing a chair back, the stool mounting seat is used for installing a cushion, the base is connected to chair legs, the tray overcomes the reset torsion of a torsion spring and the rotation driving torque which is brought to the forward rotation of the chair back fixing seat by the sitting pressure exerted on the stool mounting seat by the buttocks according to the back pressure naturally exerted on the chair back when a chair human body lies down, the optimal chair back inclination angle suitable for a user is obtained in a self-adaptive manner, meanwhile, the tightness of the chair back fixing seat and the chair back is automatically ensured by the sitting pressure exerted on the stool mounting seat by the buttocks, different comfort levels required by each person are well and automatically matched, the adjustment is avoided, the customer operation is facilitated, and the tray has a good market;

2: the front-rotating limiting part is abutted against the chair back fixing seat when the chair back initial gear adjusting area and the gear adjusting rod are matched to adjust the inclination angle of the chair back fixing seat;

3: the design locking structure locks the gear adjusting rod, keeps the inclination angle of the chair back fixing seat and the chair back, and in the locking structure, the lock ball head enters the first positioning lock groove under the elastic action of the compression spring, locks the gear adjusting rod, and simultaneously plays a role in reminding the user of the advance of the gear adjusting rod to the right position in the pause feeling sensed at the moment that the lock ball head is bounced into the first positioning lock groove, thereby being beneficial to quickly adjusting the reclining angle of the chair back.

Drawings

FIG. 1 is a schematic diagram of a chair tray configuration;

FIG. 2 is a schematic diagram of the structure of the susceptor;

FIG. 3 is a schematic view of a chair back fixing seat;

FIG. 4 is a first schematic view of the chair back initial range setting region in cooperation with the range setting lever;

FIG. 5 is a schematic view of the backrest tilt gear setting section in cooperation with the gear setting lever;

FIG. 6 is a second schematic view of the chair back initial gear setting area in cooperation with the gear setting lever;

FIG. 7 is a schematic view of the installation of the locking structure;

fig. 8 is an enlarged view of fig. 7 at a.

Detailed Description

The present invention will be further explained by the following embodiments with reference to the attached drawings.

Example 1: as shown in fig. 1-2, the chair tray comprises a base 1, a chair back fixing seat 2, a stool mounting seat 3 and a connecting seat 4, wherein the chair back fixing seat 2 is used for installing a chair back, the stool mounting seat 3 is used for installing a cushion, the base 1 is used for connecting chair legs, the connecting seat 4 and the chair back fixing seat 2 are respectively hinged with the front part and the rear part of the base 1, the front part and the rear part of the chair seat mounting seat 3 are respectively hinged with the connecting seat 4 and the chair back fixing seat 2, the base 1, the chair back fixing seat 2, the stool mounting seat 3 and the connecting seat 4 form a four-link lever structure, the hinged position of the stool mounting seat 3 and the connecting seat 4 is positioned above the hinged position of the connecting seat 4 and the base 1, the hinged position of the stool installation seat 3 and the chair back fixing seat 2 is positioned above the hinged position of the chair back fixing seat 2 and the base 1;

the base 1 comprises two base side parts 11 and a middle part 12 connected with the two base side parts 11, the two base side parts 11 and the middle part 12 form an installation cavity 13, a torsion spring 5 used for providing resetting force required by resetting the chair back fixing seat 2 is arranged in the installation cavity 13, one end of the torsion spring 5 acts on the chair back fixing seat 2, the other end of the torsion spring acts on the chair back fixing seat 2, a torsion spring action part 20 is arranged on the chair back fixing seat 2, and the torsion spring 5 acts on the chair back fixing seat 2 through the torsion spring action part 20;

the utility model discloses in the tray, as shown in fig. 1, this tray is still including inserting and establishing gear adjusting rod 6 on the base 1, as shown in fig. 3, the back of the chair inclines to lie gear setting district 22 on the lateral wall of back of the chair fixing base 2, gear adjusting rod 6 with back of the chair inclines to lie gear setting district 22 cooperation setting back of the chair fixing base 2 inclination in-process allows back of the chair fixing base 2 to overcome torsional spring 5 torsion and drives the back of the chair to rotate backward, this tray, back of the chair incline to lie gear setting district 22 and gear setting rod 6 cooperation setting back of the chair fixing base 2 inclination in-process allows back of the chair fixing base 2 to overcome torsional spring 5 torsion and drives the back of the chair to rotate backward for back of the chair pivoted angle need not too accurate, only needs perhaps one angle scope, just can allow with gear setting rod 6 cooperation setting back of the chair fixing base 2 inclination, the setting of back of the chair angle is more nimble, The chair back angle adjusting device has the advantages that the chair back angle adjusting efficiency is ensured, the structural part of the chair back fixing seat 2 is utilized to be matched with the gear adjusting rod 6 to adjust the inclination angle of the chair back fixing seat 2, and an independent part matched with the gear adjusting rod 6 is not required to be additionally designed, so that the whole structure is simpler, the production cost is greatly reduced, and the selling price is greatly reduced compared with a tray with the same function; meanwhile, the tray, the chair back fixing seat 2 is used for installing a chair back, the stool mounting seat 3 is used for installing a cushion, the base 1 is used for being connected to chair legs, the tray naturally applies back pressure to the chair back according to the back of a human body when the human body lies down, overcomes the reset torsion of the torsion spring 5 and the rotation driving torsion which is applied to the chair back fixing seat 2 by the hip under the sitting pressure of the stool mounting seat 3 and rotates forwards for the chair back fixing seat 2, the optimal chair back inclination angle suitable for a user is obtained in a self-adaptive mode, meanwhile, the tightness of the chair back fixing seat 2 and the chair back is automatically ensured by the hip under the sitting pressure of the stool mounting seat 3, the comfort degree which is different and required by everyone is well automatically matched, the adjustment is avoided, the customer operation is. When the inclination angle of the backrest fixing seat 2 and the backrest of the chair needs to be adjusted, the back pressure naturally applied to the backrest of the chair by the back of the human body when the chair body lies down is overcome, the reset torsion of the torsion spring 5 and the rotation driving torsion which is brought to the forward rotation of the backrest fixing seat 2 by the sitting pressure applied to the sitting stool mounting seat 3 by the buttocks are overcome, the backrest rotates backwards, the gear adjusting rod 6 is controlled to be inserted into the side wall of the backrest fixing seat 2, and the gear adjusting rod 6 is matched with the backrest inclination gear adjusting area 22 to limit the backrest at the backward tilting state.

The side wall of the chair back fixing seat 2 is also provided with a chair back initial gear adjusting area 21 which can be matched with the gear adjusting rod 6 to adjust the initial inclination angle of the chair back fixing seat 2. When needs were transferred the back of the chair at initial gear, control gear adjusting lever 6, make its and the back of the chair incline and lie gear setting district 22's cooperation and break away from mutually, back of the chair fixing base 2 and the back of the chair reset under the effect of torsional spring 5, reset the back, control gear adjusting lever 6 and make it insert the lateral wall to back of the chair fixing base 2 to make gear adjusting lever 6 and back of the chair initial gear setting district 21 cooperate and prescribe a limit to the back of the chair at initial inclination.

Back of the chair fixing base 2 with base 1 is through passing in two articulated shaft 01 of base lateral part 11 is articulated mutually, 5 covers of torsional spring are put on articulated shaft 01, inject torsional spring 5 connect back of the chair fixing base 2 with on the articulated shaft 01 of base 1, ensure torsional spring 5's work effect. In this embodiment, as shown in fig. 1, the stool installation seat 3 is hinged to the chair back fixing seat 2 through a second hinge shaft 02, and the second hinge shaft 02 penetrates through the torsion spring action part 20, so that the second hinge shaft 02 and the torsion spring action part 20 jointly bear the restoring torsion of the torsion spring 5, and the overall structural strength is good.

As shown in fig. 5, the chair back reclining gear setting area 22 is provided with a forward rotation stopping surface 221, after the chair back reclining gear setting area 22 cooperates with the gear setting rod 6 to set the inclination angle of the chair back fixing seat 2, the forward rotation stopping surface 221 prohibits the chair back fixing seat 2 from driving the chair back to rotate forward, and allows the chair back fixing seat 2 to overcome the torsion of the torsion spring 5 to drive the chair back to rotate backward, so as to ensure good comfort degree required by each person in automatic matching, the forward rotation stopping surface 221 can be a plane or a concave surface, and the concave surface cooperates with the gear setting rod 6, so that the overall stability of the tray is better.

As for the matching and setting relationship between the chair back initial gear setting area 21 and the gear setting rod 6, as shown in fig. 4, the chair back initial gear setting area 21 is provided with a lock hole 211, and a user can set the tilt angle of the chair back fixing seat 2 by inserting the gear setting rod 6 into the lock hole 211, as also shown in fig. 6, the chair back initial gear setting area 21 is provided with a backward rotation stop surface 212, and the user can set the tilt angle of the chair back fixing seat 2 by matching the backward rotation stop surface 212 and the gear setting rod 6, and after setting, the backward rotation stop surface 212 prohibits the chair back fixing seat 2 from driving the chair back to rotate backward, that is, in this gear, the back of the human body leans against the chair back, and the chair back cannot rotate backward.

Preferably, as shown in fig. 1, the seat mounting base 3 is provided with a forward rotation limiting portion 31, which can prevent the seat pressure generated by the buttocks on the seat mounting base when a human body sits on the seat cushion from forcing the seat back fixing base 2 to rotate forward excessively to damage or fail the torsion spring 5. The front-rotating limiting part 31 is abutted to the chair back fixing seat 2 when the chair back initial gear setting area 21 and the gear setting rod 6 are matched with the chair back fixing seat 2 to set the inclination angle of the chair back fixing seat 2, namely, when the chair back fixing seat 2 rotates under the action of the torsion spring and is contacted with the front-rotating limiting part, the inclination angle position of the chair back fixing seat 2 is just the inclination angle of the chair back initial gear setting area 21 and the gear setting rod 6 which are matched with the chair back fixing seat 2, a user can find the lock hole or the rear-rotating stop surface conveniently, and the adjustment of the gear of the chair back fixing seat and the chair back can be realized quickly.

Preferably, in another embodiment, as shown in fig. 7-8, a locking structure 7 for adjusting the gear adjusting lever 6 is further included, the locking structure 7 locks the gear adjusting lever 6 after the gear adjusting lever 6 and the chair back initial gear adjusting area 21 or the chair back reclining gear adjusting area 22 cooperate to adjust the tilt angle of the chair back fixing seat 2, so as to maintain the tilt angle of the chair back fixing seat 2 and the chair back, specifically, the locking structure 7 includes a positioning portion 71 having a first positioning locking groove 711 and a second positioning locking groove 712 on the gear adjusting lever 6, a ball locking head 72 for cooperating with the first positioning locking groove 711 or the second positioning locking groove 712, a compression spring 73 for cooperating with the ball locking head 72, a mounting sleeve 74 having a mounting groove 741 disposed in the mounting cavity 13, the compression spring 73 and the ball locking head 72 are limited in the mounting groove 741, and the ball-locking head 72 is partially exposed out of the mounting groove 741, when the gear-adjusting lever 6 is pushed into the chair-back initial gear-adjusting area 21 or the chair-back reclining gear-adjusting area 22, the ball-locking head 72 enters the first positioning locking groove 711 under the elastic force of the compression spring 73 to lock the gear-adjusting lever 6, and meanwhile, the pause feeling felt by the user at the moment when the ball-locking head 72 is pushed into the first positioning locking groove 711 plays a role in reminding the user that the gear-adjusting lever 6 is pushed in place, which is beneficial to quickly adjusting the reclining angle of the chair-back, and when the gear-adjusting lever 6 is pulled out, the second positioning locking groove 712 and the ball-locking head 72 cooperate to limit the gear-adjusting lever 6 at a fixed position, which cannot be pulled out. In the above embodiment, the mounting cavity 13 is provided with the mounting liner plate 75 for mounting the mounting sleeve 74, the mounting cavity 13 is a through cavity, and the compression spring 73 extends out of the through cavity and abuts against the middle portion 12. Preferably, the mounting plate 75 is provided with a mounting hole 751, the mounting sleeve 74 is provided with a clamping portion 742, the clamping portion 742 is provided with a clamping notch, and the clamping portion 742 is connected with the mounting hole 751 of the mounting plate 75 through the clamping notch, so that the mounting of the mounting sleeve 74 is very convenient.

Example 2: a leisure chair comprising a chair tray as described in embodiment 1.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by the technical solution of the present invention by those skilled in the art should fall into the protection scope of the present invention, and the technical contents claimed by the present invention have been fully recorded in the claims.

Claims (10)

1. The chair tray is characterized by comprising a base (1), a chair back fixing seat (2), a sitting stool mounting seat (3) and a connecting seat (4), wherein the connecting seat (4) and the chair back fixing seat (2) are respectively hinged with the front part and the rear part of the base (1), the front part and the rear part of the sitting stool mounting seat (3) are respectively hinged with the connecting seat (4) and the chair back fixing seat (2), and the base (1), the chair back fixing seat (2), the sitting stool mounting seat (3) and the connecting seat (4) form a four-link lever structure;

the seat (1) comprises two seat side parts (11) and a middle part (12) connected with the two seat side parts (11), the two seat side parts (11) and the middle part (12) form a mounting cavity (13), and a torsion spring (5) used for providing resetting force required by the resetting of the seat back fixing seat (2) is arranged in the mounting cavity (13);

the utility model discloses a chair back of chair is including the back of the chair of having on the lateral wall of back of the chair fixing base (2) and inclines gear setting district (22), and this tray is still including inserting and establishing gear setting pole (6) on base (1), gear setting pole (6) with back of the chair inclines gear setting district (22) cooperation setting back of the chair fixing base (2) inclination in-process allows back of the chair fixing base (2) to overcome torsional spring (5) torsion and drives the back of the chair backward rotation.

2. The chair tray as claimed in claim 1, wherein the side wall of the seat back fixing base (2) is further provided with a seat back initial gear setting area (21) which can cooperate with the gear setting rod (6) to set the initial inclination angle of the seat back fixing base (2).

3. The chair tray according to claim 1, wherein the backrest fixing base (2) is hinged to the base (1) through a hinge axis one (01) passing through both of the base side portions (11), and the torsion spring (5) is fitted around the hinge axis one (01).

4. Chair tray according to claim 1, characterized in that the backrest-reclining setting area (22) is provided with a front stop surface (221).

5. A chair tray according to claim 2, characterized in that the seat back initial gear setting area (21) is provided with a lock hole (211).

6. Chair tray according to claim 2, characterized in that the chair back initial gear setting area (21) is provided with a back rotation stop surface (212).

7. The chair tray according to claim 2, characterized in that the stool mounting base (3) is provided with a forward rotation limiting part (31); the front rotation limiting part (31) is abutted against the chair back fixing seat (2) when the chair back initial gear adjusting area (21) and the gear adjusting rod (6) are matched to adjust the inclination angle of the chair back fixing seat (2).

8. The chair tray according to claim 1, characterized in that it further comprises a locking structure (7) for locking the gear adjusting lever (6); the locking structure (7) comprises a positioning part (71) which is positioned on the gear adjusting rod (6) and is provided with a first positioning locking groove (711) and a second positioning locking groove (712), a first locking ball head (72) which is matched and locked with the first positioning locking groove (711) or the second positioning locking groove (712), a compression spring (73) which is acted on the locking ball head (72), and an installation sleeve (74) which is arranged in the installation cavity (13) and is provided with an installation groove (741), wherein the compression spring (73) and the locking ball head (72) are limited in the installation groove (741), and part of the locking ball head (72) is exposed out of the installation groove (741).

9. The chair tray according to claim 8, characterized in that a mounting lining (75) for mounting the mounting sleeve (74) is arranged in the mounting cavity (13), the mounting cavity (13) is a through cavity, and the compression spring (73) extends out of the through cavity and abuts against the middle part (12).

10. A leisure chair comprising a chair tray as claimed in any one of claims 1 to 9.

Images