CN217471564U - Automatic button of stroking of screen cloth of back of chair - Google Patents

Abstract

The utility model discloses an automatic button for covering screen cloth on the back of a chair, which comprises a frame, wherein a fixed structure, a top button covering structure and two side button covering structures are arranged on the frame, a back of the chair is arranged on the fixed structure, the screen cloth is arranged on the back of the chair, the top button covering structure comprises a second power source and a second button covering roller, the second power source drives the second button covering roller to move along the top of the back of the chair, the two side button covering structures are respectively positioned at the two sides of the top button covering structure, the side button covering structure comprises a first power source and a first button covering roller, the first power source is used for driving the side wall of the first button covering roller to move so that the screen cloth can be buckled into grooves at the two sides of the back of the chair, the utility model has reasonable structure, after the back of the chair is fixed by the fixed structure, the top button covering structure can buckle one side of the screen cloth with the top of the back of the chair, the two side button covering structures can buckle one side of the screen cloth with the side of the back of the chair, the screen cloth is in a tight state, the manual labor force is liberated, and the efficiency is improved.

Description

Automatic button of stroking of screen cloth of back of chair

Technical Field

The utility model relates to a back of the chair screen cloth installation field, in particular to automatic button of meneing of back of the chair screen cloth.

Background

The comfort level of the chair and the standardized installation of the module are more and more favored by customers, and the office network chair gradually becomes the mainstream of the office chair. At present, the frame of the chair back of the mainstream office net chair in the market is to insert an edge strip to close the net or to close the net through a net cloth sleeve.

The work of buckling the mesh on the chair back is often performed manually at present, and because the initial size of the mesh is close to that of the chair back, the mesh needs to be stretched when buckling is performed, so that the mesh is completely stretched and then buckled. After the work of buckling many times, workman's hand can produce the pain, can't carry out work continuously. In view of the above problems, a solution is proposed as follows.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an automatic button of holding up of back of the chair screen cloth has and can realize holding up the button of screen cloth through the machine, improves production efficiency's advantage.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides an automatic button of holding of back of chair screen cloth, includes the frame, be equipped with fixed knot structure, top and hold the button structure and two sides and hold the button structure in the frame, be equipped with the back of the chair in the frame, the back of the chair is placed on fixed knot structure, and fixed through fixed knot structure, and the screen cloth is placed on the back of the chair, the top holds the button structure and includes that second power supply and second hold the button roller, second power supply drives second and holds the button roller and remove along the top of the back of the chair to make the screen cloth detain the top at the back of the chair, two the side holds the button structure and is located the both sides of top respectively and holds the button structure, the side holds the button structure and includes that first power supply and first power supply detains the roller, first power supply is used for driving first power supply and holds the button roller and removes along the lateral wall of the back of the chair, so that the screen cloth detains on the side of the back of the chair.

Preferably, the fixed knot constructs including afterbody clamp splice mechanism and a plurality of piece group, afterbody clamp splice mechanism includes first fixed block and two first fixed columns, first fixed block and frame fixed connection, two the equal fixed connection of first fixed column is on first fixed block, the afterbody of the back of the chair is placed between two first fixed columns to it is fixed through the centre gripping of two first fixed columns, and is a plurality of the piece group that stands supports respectively in a plurality of stress points department of the back of the chair, in order to realize the support to the back of the chair.

As preferred, the piece group is including short pole setting, long pole setting and expander bar, the up end of short pole setting and long pole setting is the inclined plane, just short pole setting and long pole setting all laminate with the lateral wall of the back of the chair, and are a plurality of long pole setting and short pole setting cooperation to the realization is to the support of the back of the chair, the upper end of expander bar is located the inside wall department of the back of the chair, and offsets, a plurality of with the inside wall of the back of the chair the expander bar is mutually supported to the location of the realization to the back of the chair.

Preferably, the fixed knot constructs still includes the pressure mechanism, the pressure mechanism includes support frame and first electronic jar, support frame and frame fixed connection, first electronic jar is fixed on the support frame, be equipped with the briquetting on the output shaft of first electronic jar, the briquetting is used for pressing the up end at the back of the chair to make the back of the chair unable removal.

Preferably, the first power source comprises a first underframe, the frame is provided with two guide rails, the bottom of the first underframe is provided with a first guide block, the first guide block is connected with the first guide rail in a sliding manner, the frame is further provided with a first motor, the first motor is provided with a first threaded rod, the lower end surface of the first underframe is fixedly provided with a first threaded hole, the first threaded rod is in threaded connection with the first threaded hole, and the first threaded rod is used for driving the first underframe to move on the frame.

Preferably, the first power source further comprises a first moving frame, a first slide rail is arranged on the first chassis, a first slide block is fixedly arranged at the lower end of the first moving frame, the first slide block is connected with the first slide rail in a sliding mode, a first electric push rod is arranged on one side of the first moving frame, the first electric push rod is fixedly connected with the first chassis, the first electric push rod is used for pushing the first moving frame to move, a second moving frame is arranged on the first moving frame, the second moving frame is connected with the first moving frame in a sliding mode, a second electric push rod is arranged on the first moving frame, an output shaft of the second electric push rod is fixedly connected with the second moving frame, and the second electric push rod is used for pushing the second moving frame to move.

Preferably, one side of the first button pressing roller is provided with a supporting plate, a connecting hole is formed in the supporting plate, a plurality of connecting columns are arranged on the second movable frame, one ends of the connecting columns are inserted into the connecting holes respectively and are in sliding connection with the connecting hole, first springs are arranged on the connecting columns and used for tensioning the supporting plate, so that the supporting plate is fixed to the first movable frame, a supporting block is arranged on the supporting plate, the first button pressing roller is rotatably connected with the supporting block, tension springs are arranged on the first button pressing roller and used for tensioning the first button pressing roller, and the first button pressing roller is enabled to keep an initial angle.

Preferably, the second power source includes a transverse power set and a longitudinal power set, the second button-closing roller is connected to an output shaft of the longitudinal power set, the transverse power set is used for adjusting the position of the longitudinal power set, the transverse power set includes two second guide rails, a second guide block is arranged at the lower end of the longitudinal power set, the second guide block is connected with the second guide rail in a sliding manner, the transverse power set further includes a second motor and a second threaded rod, a driven guide wheel is fixedly arranged at one end of the second threaded rod, a driving guide wheel is arranged on the output shaft of the second motor, a driving belt is arranged on the driving guide wheel, the other side of the driving belt is sleeved on the driven guide wheel, and the second motor drives the second threaded rod to rotate through the driving belt, so that the longitudinal power set is driven.

Preferably, the longitudinal power unit comprises two third electric push rods and two second bottom frames, threaded holes are formed in the second bottom frames, the two threaded holes in the second bottom frames are respectively a forward thread and a reverse thread, each second threaded rod comprises a forward threaded section and a reverse threaded section, the second threaded rods are in threaded connection with the two second bottom frames, a push plate is arranged on an output shaft of each third electric push rod and is in sliding connection with the second bottom frames, and the second catch rollers are located on one side, away from the bottom frames, of the push plate.

Preferably, a fixing plate is arranged on one side of the second button-pressing roller, a plurality of fixing holes are formed in the fixing plate, a plurality of fixing columns are fixedly arranged on the push plate, one ends of the fixing columns are respectively inserted into the fixing holes and are in sliding connection with the fixing holes, second springs are sleeved on the fixing columns, and the other ends of the second springs are fixedly connected with the fixing plate.

The beneficial effects of the utility model are that: the chair back is fixed by the fixing structure, so that the chair back does not shake when a button is pressed. After the top buckling structure is started, the two second buckling rollers start from the middle position of the top of the chair back and move along the boundary of the top of the chair back, so that the buckling of the mesh on the top of the chair back is realized.

After the side buckling structure is started, a first buckling roller is moved along the side wall of the chair back to buckle the screen cloth on the side wall of the chair back. The first button pressing roller is movably connected with the support block due to the fact that the side edge of the chair back is irregular, so that the first button pressing roller can be always attached to the side edge of the chair back, and the angle of the first button pressing roller cannot be deflected too much by the aid of the two tension springs, so that the screen cloth can be pressed and buckled.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

fig. 2 is a schematic structural diagram of a side button closing structure according to an embodiment;

FIG. 3 is a schematic structural diagram of a top button-closing structure according to an embodiment;

FIG. 4 is a schematic structural view of a fixing structure according to an embodiment;

FIG. 5 is an enlarged view of area A in FIG. 2;

fig. 6 is an enlarged view of region B in fig. 3.

Reference numerals: 1. a frame; 2. a fixed structure; 3. a top button holding structure; 4. a side button holding structure; 5. a chair back; 6. a second button-holding roller; 7. a first button-holding roller; 8. a first fixed block; 9. a first fixed column; 10. a short upright post; 11. a long upright rod; 12. expanding the rod; 13. a first electric cylinder; 14. a support frame; 15. briquetting; 16. a first chassis; 17. a first guide rail; 18. a first guide block; 19. a first motor; 20. a first threaded rod; 21. a first movable frame; 22. a first slide rail; 23. a first slider; 24. a first electric push rod; 25. a second movable frame; 26. a second electric push rod; 27. a support plate; 28. connecting columns; 29. a first spring; 30. a support block; 31. a tension spring; 32. a second guide rail; 33. a second guide block; 34. a second motor; 35. a second threaded rod; 36. a driven guide wheel; 37. a driving guide wheel; 38. a transmission belt; 39. a third electric push rod; 40. a second chassis; 41. pushing the plate; 42. a fixing plate; 43. fixing a column; 44. a second spring.

Detailed Description

The following is only the preferred embodiment of the present invention, the protection scope is not limited to this embodiment, and all technical solutions belonging to the idea of the present invention should belong to the protection scope of the present invention. In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front," "back," "left," "right," "upper," and "lower" refer to directions in the drawings, and the terms "bottom" and "top," "inner," and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

As shown in fig. 1 to 6, an automatic closing button for a seat back mesh includes a frame 1. The frame 1 is provided with a fixing structure 2, the fixing structure 2 is provided with a chair back 5, the chair back 5 is placed on the fixing structure 2 and is fixed through the fixing structure 2, and the screen cloth is placed on the chair back 5.

The fixed structure 2 comprises a tail clamping block mechanism and a plurality of vertical block groups, the tail clamping block mechanism is matched with the shape of the tail of the chair back 5, and the position of the tail of the chair back 5 can be clamped. The tail clamping block mechanism comprises a first fixing block 8 and two first fixing columns 439, the first fixing block 8 is fixedly connected with the rack 1, and the two first fixing columns 439 are fixedly connected to the first fixing block 8. The structure at the tail part of the chair back 5 is placed between the two first fixing columns 439 and is clamped and fixed through the two first fixing columns 439. After the clamping of the tail part of the chair back 5 is completed, the position between the chair back 5 and the fixed structure 2 is determined, and the mesh cloth on the chair back 5 can be buckled through other structures.

The upright blocks are respectively supported at a plurality of stress points of the chair back 5 so as to realize the support of the chair back 5. The upright set comprises a short upright rod 10, a long upright rod 11 and an expansion rod 12, the upper end faces of the short upright rod 10 and the long upright rod 11 are inclined planes, and the short upright rod 10 and the long upright rod 11 are attached to the side wall of the chair back 5. The short upright post 10 and the long upright post 11 support the chair back 5, so that the chair back 5 has a certain height, and the button closing of the chair back 5 is more convenient. The upper end of the expanding rod 12 is positioned at the inner side wall of the chair back 5 and is propped against the inner side wall of the chair back 5. The expanding rods 12 are matched with each other to fix the chair back 5 at the position, so that the chair back 5 can be conveniently closed.

The fixed structure 2 further comprises a pressure mechanism, the pressure mechanism comprises a support frame 14 and a first electric cylinder 13, and the support frame 14 is fixedly connected with the rack 1. The first electric cylinder 13 is fixed on the support frame 14, a press block 15 is arranged on an output shaft of the first electric cylinder 13, and the press block 15 is used for pressing the upper end face of the chair back 5, so that the chair back 5 cannot move. The first electric cylinder 13 can also be replaced by other elements capable of providing linear power, such as an air cylinder, a hydraulic cylinder, etc.

The frame 1 is further provided with a top button-closing structure 3, and the top button-closing structure 3 comprises a second power source and a second button-closing roller 6. The second power source drives the second button-pressing roller 6 to move along the top of the chair back 5, and the second button-pressing roller 6 gradually presses the screen cloth onto the chair back 5, so that the screen cloth on the top of the chair back 5 is buckled.

The second power source comprises a transverse power group and a longitudinal power group, the second button-closing roller 6 is connected with an output shaft of the longitudinal power group, and the transverse power group is used for adjusting the position of the longitudinal power group. The longitudinal power group is connected with the second button-pressing roller 6, the longitudinal power group pushes the second button-pressing roller 6 to be close to the top of the chair back 5, and then the second button-pressing roller 6 can move along the top of the chair back 5 through the driving of the transverse power group, so that the mesh positioned at the top of the chair back 5 is buckled.

The longitudinal power pack comprises two third electric push rods 39 and two second underframe 40, and the second underframe 40 is positioned on the transverse power pack and driven by the transverse power pack. The third electric push rod 39 is placed on the second chassis 40 and moves synchronously with the second chassis 40. The output shaft of the third electric push rod 39 is provided with a push plate 41, the push plate 41 is connected with the second chassis 40 in a sliding manner, and the second button roller 6 is positioned on the side of the push plate 41 away from the chassis.

A fixing plate 42 is arranged on one side of the second button-holding roller 6, a plurality of fixing holes are formed in the fixing plate 42, and a plurality of fixing columns 43 are fixedly arranged on the push plate 41. One end of each of the fixing posts 43 is inserted into each of the fixing holes and slidably connected to the fixing holes. The fixed column 43 is sleeved with a second spring 44, and the other end of the second spring 44 is fixedly connected with the fixed plate 42. When the second latching roller 6 moves along the top portion of the seatback 5, a force applied to the second latching roller 6 by the top portion of the seatback 5 is transmitted to the fixed plate 42, and one side of the fixed plate 42 compresses the second spring 44. The elastic force of the second spring 44 on the fixing plate 42 is transmitted to the second pressing roller 6, and the second pressing roller 6 can be brought into close contact with the position, thereby engaging the screen cloth at the position.

The transverse power group comprises two second guide rails 32, a second guide block 33 is arranged at the lower end of the longitudinal power group, and the second guide block 33 is connected with the second guide rails 32 in a sliding mode. The transverse power pack also comprises a second motor 34 and a second threaded bar 35. Be equipped with the screw hole on the second chassis 40, the screw hole on two second chassis 40 is forward screw thread and reverse screw thread respectively, and second threaded rod 35 includes positive thread section and reverse thread section, second threaded rod 35 and two equal threaded connection of second chassis 40. The second threaded bar 35 is able to drive the two second carriages 40 simultaneously to the two sides, or simultaneously to the middle.

One end of the second threaded rod 35 is fixedly provided with a driven guide wheel 36, and an output shaft of the second motor 34 is provided with a driving guide wheel 37. The driving guide wheel 37 is provided with a transmission belt 38, and the other side of the transmission belt 38 is sleeved on the driven guide wheel 36. After the second motor 34 is started, the driving guide wheel 37 drives the driven guide wheel 36 to rotate through the transmission belt 38, and the driven guide wheel 36 drives the second threaded rod 35 to rotate, thereby controlling the movement of the longitudinal power unit.

The frame 1 is further provided with two side button closing structures 4, and the two side button closing structures 4 are respectively located at two sides of the top button closing structure 3. The side buckling structure 4 includes a first power source for driving the first buckling roller 7 to move along the side wall of the seatback 5 so as to buckle the screen cloth on the side of the seatback 5, and a first buckling roller 7.

The first power source comprises a first underframe 16, two guide rails are arranged on the frame 1, a first guide block 18 is arranged at the bottom of the first underframe 16, and the first guide block 18 is connected with a first guide rail 17 in a sliding manner. The frame 1 is further provided with a first motor 19, the first motor 19 is provided with a first threaded rod 20, the lower end face of the first underframe 16 is fixedly provided with a first threaded hole, and the first threaded rod 20 is in threaded connection with the first threaded hole. After the first motor 19 is started, the first threaded rod 20 is driven to rotate, so that the first threaded rod 20 drives the first chassis 16 to move on the frame 1.

The first power source further includes a first moving frame 21, and the first moving frame 21 is placed on the first base frame 16 to move synchronously with the first base frame 16. The first chassis 16 is provided with a first slide rail 22, the lower end of the first movable frame 21 is fixedly provided with a first slide block 23, and the first slide block 23 is slidably connected with the first slide rail 22. One side of the first moving frame 21 is provided with a first electric push rod 24, the first electric push rod 24 is fixedly connected with the first chassis 16, and the first electric push rod 24 is used for pushing the first moving frame 21 to move. The first button roller 7 is located on a side of the first moving frame 21 away from the first electric push rod 24, and the first electric push rod 24 can push the first button roller 7 to approach or be away from a side of the seat back 5.

The first moving frame 21 is provided with a second moving frame 25, and the first button roller 7 is fixed to the second moving frame 25. The second moving frame 25 is slidably connected to the first moving frame 21. The first moving frame 21 is provided with a second electric push rod 26, and an output shaft of the second electric push rod 26 is fixedly connected with the second moving frame 25. The output shaft of the second electric push rod 26 is arranged vertically downward, and the position of the second moving frame 25 can be changed, so that the second moving frame 25 drives the first button roller 7 to press on the side edge of the chair back 5.

After the first button-pressing roller 7 presses the side edge of the seat back 5, the first motor 19 is started to drive the first chassis 16 to move, and the first chassis 16 moves along the direction of the side edge of the seat back 5, so that the first button-pressing roller 7 presses the side edge of the seat back 5 and moves along the side edge of the seat back 5, and the button-pressing of the mesh at the side edge of the seat back 5 is realized.

A supporting plate 27 is arranged on one side of the first button holding roller 7, a connecting hole is formed in the supporting plate 27, and a plurality of connecting columns 28 are arranged on the second movable frame 25. One end of each of the plurality of connecting posts 28 is inserted into the plurality of connecting holes and slidably connected to the connecting holes. The connecting column 28 is provided with a first spring 29, and the first spring 29 is used for tensioning the supporting plate 27 so as to fix the supporting plate 27 and the first moving frame 21. The supporting plate 27 is provided with a supporting block 30, the first button roller 7 is rotatably connected with the supporting block 30, a tension spring 31 is arranged on the first button roller 7, and the tension spring 31 is used for tensioning the first button roller 7 so as to keep the initial angle of the first button roller 7.

The working principle is as follows: during the use, will need the back of the chair 5 of processing to place fixed knot on 2 earlier, start first electronic jar 13, first electronic jar 13 can drive briquetting 15 and press on the back of the chair 5, fixes the back of the chair 5. And then, the mesh cloth is laid on the upper end surface of the chair back 5 to finish the preparation work.

Then, the two third electric push rods 39 are activated, and the two second latching rollers 6 are moved by the two third electric push rods 39, so that the two second latching rollers 6 are abutted against the middle position of the top edge of the seatback 5. And then, the second motor 34 is started, the second motor 34 drives the second threaded rod 35 to rotate through the transmission belt 38, the second threaded rod 35 drives the two second bottom frames 40 to be away from each other, the two second button holding rollers 6 move along the middle position of the top edge of the chair back 5, the assembly moves along the two sides of the top edge of the chair back 5, and in the moving process, the mesh cloth at the top of the chair back 5 is held and buckled on the chair back 5, so that the mesh cloth at the top of the chair back 5 is buckled.

After the button closing work of the top of the chair back 5 is finished, the two side button closing structures 4 are started simultaneously. The first electric push rod 24 first pushes the first moving frame 21, so that the first moving frame 21 drives the first button roller 7 to approach the side edge of the seat back 5. Then, the second electric push rod 26 pushes the second moving frame 25 to move in the vertical direction, so that the second moving frame 25 drives the first button roller 7 to cling to the side of the seat back 5.

And finally, starting the first motor 19, driving the first threaded rod 20 to rotate by the first motor 19, driving the first bottom frame 16 to move by the first threaded rod 20, driving the first button holding roller 7 to move along the side edge direction of the chair back 5 by the first bottom frame 16, and finally realizing the fastening of the screen cloth at the side edge of the chair back 5.

The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. The automatic button closing of the screen cloth on the chair back comprises a frame (1) and is characterized in that a fixing structure (2), a top button closing structure (3) and two side button closing structures (4) are arranged on the frame (1), the chair back (5) is placed on the fixing structure (2) and fixed through the fixing structure (2), the screen cloth is placed on the chair back (5), the top button closing structure (3) comprises a second power source and a second button closing roller (6), the second power source drives the second button closing roller (6) to move along the top of the chair back (5) so as to enable the screen cloth to be buckled at the top of the chair back (5), the two side button closing structures (4) are respectively located on two sides of the top button closing structure (3), and the side button closing structure (4) comprises a first power source and a first button closing roller (7), the first power source is used for driving the first button roller (7) to move along the side wall of the chair back (5) so as to enable the screen cloth to be buckled on the side edge of the chair back (5).

2. The automatic button of claim 1, wherein the fixing structure (2) comprises a tail clamping mechanism and a plurality of vertical block groups, the tail clamping mechanism comprises a first fixing block (8) and two first fixing columns (9), the first fixing block (8) is fixedly connected with the frame (1), the two first fixing columns (9) are fixedly connected to the first fixing block (8), the tail of the chair back (5) is placed between the two first fixing columns (9) and is clamped and fixed through the two first fixing columns (9), and the vertical block groups are respectively supported at a plurality of stress points of the chair back (5) to support the chair back (5).

3. The automatic button of stroing of back of chair screen cloth of claim 2, characterized in that, the piece group is including short pole setting (10), long pole setting (11) and expander rod (12), the up end of short pole setting (10) and long pole setting (11) is the inclined plane, just short pole setting (10) and long pole setting (11) all laminate with the lateral wall of the back of the chair (5), and is a plurality of long pole setting (11) and short pole setting (10) cooperation are in order to realize the support to the back of the chair (5), the upper end of expander rod (12) is located the inside wall department of the back of the chair (5), and offsets with the inside wall of the back of the chair (5), and is a plurality of expander rod (12) are mutually supported to realize the location to the back of the chair (5).

4. The automatic button of claim 3, characterized in that the fixing structure (2) further comprises a pressure mechanism, the pressure mechanism comprises a support frame (14) and a first electric cylinder (13), the support frame (14) is fixedly connected with the frame (1), the first electric cylinder (13) is fixed on the support frame (14), a pressing block (15) is arranged on an output shaft of the first electric cylinder (13), and the pressing block (15) is used for pressing the upper end face of the chair back (5) so that the chair back (5) cannot move.

5. The automatic button of claim 1, characterized in that, the first power source includes a first chassis (16), two first guide rails (17) are arranged on the frame (1), a first guide block (18) is arranged at the bottom of the first chassis (16), the first guide block (18) and the first guide rail (17) are connected in a sliding manner, a first motor (19) is further arranged on the frame (1), a first threaded rod (20) is arranged on the first motor (19), a first threaded hole is fixedly arranged on the lower end face of the first chassis (16), the first threaded rod (20) is in threaded connection with the first threaded hole, and the first threaded rod (20) is used for driving the first chassis (16) to move on the frame (1).

6. The automatic button of claim 5, wherein the first power source further comprises a first moving frame (21), a first slide rail (22) is arranged on the first base frame (16), a first slider (23) is fixedly arranged at the lower end of the first moving frame (21), the first slider (23) is slidably connected with the first slide rail (22), a first electric push rod (24) is arranged on one side of the first moving frame (21), the first electric push rod (24) is fixedly connected with the first base frame (16), the first electric push rod (24) is used for pushing the first moving frame (21) to move, a second moving frame (25) is arranged on the first moving frame (21), the second moving frame (25) is slidably connected with the first moving frame (21), and a second electric push rod (26) is arranged on the first moving frame (21), an output shaft of the second electric push rod (26) is fixedly connected with the second moving frame (25), and the second electric push rod (26) is used for pushing the second moving frame (25) to move.

7. The automatic button for covering screen cloth on chair back according to claim 6, characterized in that a supporting plate (27) is arranged at one side of the first button roller (7), the supporting plate (27) is provided with a connecting hole, the second movable frame (25) is provided with a plurality of connecting columns (28), one ends of the connecting columns (28) are respectively inserted into the connecting holes, and is connected with the connecting hole in a sliding way, a first spring (29) is arranged on the connecting column (28), the first spring (29) is used for tensioning the supporting plate (27), so that the supporting plate (27) is fixed with the first moving frame (21), a supporting block (30) is arranged on the supporting plate (27), the first button holding roller (7) is rotationally connected with the support block (30), a tension spring (31) is arranged on the first button holding roller (7), the tension spring (31) is used for tensioning the first button-closing roller (7) so as to enable the first button-closing roller (7) to keep an initial angle.

8. The automatic button of claim 1, wherein the second power source comprises a transverse power group and a longitudinal power group, the second button roller (6) is connected with an output shaft of the longitudinal power group, the transverse power group is used for adjusting the position of the longitudinal power group, the transverse power group comprises two second guide rails (32), a second guide block (33) is arranged at the lower end of the longitudinal power group, the second guide block (33) is connected with the second guide rail (32) in a sliding manner, the transverse power group further comprises a second motor (34) and a second threaded rod (35), a driven guide wheel (36) is fixedly arranged at one end of the second threaded rod (35), a driving guide wheel (37) is arranged on the output shaft of the second motor (34), a driving belt (38) is arranged on the driving guide wheel (37), and the other side of the driving belt (38) is sleeved on the driven guide wheel (36), the second motor (34) drives the second threaded rod (35) to rotate through a transmission belt (38) so as to drive the longitudinal power unit.

9. The automatic button of laying out of back of chair screen cloth of claim 8, characterized in that, vertical power group includes two third electric putter (39) and two second chassis (40), be equipped with the screw hole on second chassis (40), two screw hole on second chassis (40) is forward screw thread and reverse screw thread respectively, second threaded rod (35) are including positive thread section and negative thread section, second threaded rod (35) and two equal threaded connection of second chassis (40), be equipped with push pedal (41) on the output shaft of third electric putter (39), push pedal (41) and second chassis (40) sliding connection, second is laid out and is detained one side that roller (6) are located push pedal (41) and keep away from the chassis.

10. The automatic button of claim 9, wherein a fixing plate (42) is arranged on one side of the second button roller (6), the fixing plate (42) is provided with a plurality of fixing holes, the pushing plate (41) is fixedly provided with a plurality of fixing columns (43), one ends of the fixing columns (43) are respectively inserted into the fixing holes and are slidably connected with the fixing holes, the fixing columns (43) are sleeved with second springs (44), and the other ends of the second springs (44) are fixedly connected with the fixing plate (42).

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