Dual-purpose office chair for sitting and lying

Abstract

The invention relates to a sitting and lying dual-purpose office chair, which is used for solving the problem that the positions of armrests are still matched with the sitting posture of a user to use an electric chair when the user wants to get up due to the fact that the armrests of some office chairs mentioned in the background technology cannot synchronously ascend and descend and the heights of the office chairs need to be manually adjusted. Therefore, some users are difficult to get up due to the fact that the users cannot touch the handrails, and the use experience is affected. Comprising a seat plate, a backrest rotationally arranged at the top of the seat plate and chair legs arranged at the bottom of the seat plate, and mounting plates are fixedly arranged on the left side edge and the right side edge of the seat plate.

Description

Technical Field

[0001] The invention relates to the technical field of furniture, in particular to an office chair for sitting and lying. Background Art

[0002] In this fast-paced era, lunch break has become an important time for many people to restore energy and adjust their status. However, traditional office chairs often cannot meet people's needs for comfort during lunch break. Therefore, the lunch break reclining office chair came into being and became an indispensable part of the modern office environment.

[0003] In the prior art, an invention patent document with authorization publication number CN116268844A and titled “An electric chair for office use” discloses a chair comprising a seat, a universal wheel seat being installed at the bottom end of the seat, a chair back being rotatably connected to one side of the seat, a support unit for auxiliary support being arranged between the seat and the chair back; the support unit comprises a pair of first gears fixedly connected to both sides of the seat, a connecting sleeve being fixedly connected to the chair back, a pair of sliding sleeves being slidably connected in the connecting sleeve, and a screw being threadedly connected in the sliding sleeve.

[0004] However, the above patented technology still has defects: since the armrests do not rise and fall synchronously and need to be adjusted manually in height, when the user wants to stand up after using the electric chair in a lying position, the position of the armrests still matches the state of the user using the electric chair in a sitting position. This makes it difficult for some users to stand up because they cannot touch the armrests, affecting the user experience. Summary of the invention

[0005] In view of the deficiencies existing in the prior art, the present invention provides an office chair that can be used for both sitting and lying down, which is used to solve the technical problem that some office chairs mentioned in the background technology have armrests that cannot be raised and lowered synchronously and need to be manually adjusted in height. Therefore, when the user uses the electric chair in a lying position and then wants to stand up, the position of the armrests still matches the state of the user using the electric chair in a sitting position. This makes it difficult for some users to stand up because they cannot touch the armrests, thereby affecting the user experience.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions:

[0007] A sitting and lying dual-purpose office chair comprises a seat plate, a backrest rotatably arranged on the top of the seat plate, and chair legs arranged at the bottom of the seat plate, wherein the left and right sides of the seat plate are fixedly provided with mounting plates, wherein a side wall of one mounting plate away from the seat plate is provided with a through hole, a bearing is fixedly arranged in the through hole on the mounting plate, a rotating rod is fixedly arranged on the inner wall of the bearing on the mounting plate, the rotating rod passes through the outer periphery of the rod section of the mounting plate and is fixedly provided with a first gear, a rotating shaft parallel to the rotating rod is rotatably arranged between the two mounting plates, the rotating shaft is arranged at one end of the two mounting plates away from the seat plate, the outer periphery of the rod section of the rotating shaft passing through the side wall of the mounting plate and is fixedly provided with a second gear, the first gear is meshed with the second gear, the backrest is fixedly arranged on the outer periphery of the rotating shaft, a locking assembly is arranged on the rotating rod, and the locking assembly is used to make the rotating rod and the mounting plate relatively stationary;

[0008] The rotating shaft is arranged on the outer periphery of the rod section between the two mounting plates, and a force-bearing plate is also arranged between the two mounting plates, and the force-bearing plate is fixedly arranged at the ends of the two mounting plates away from the seat plate, and the rotating shaft is arranged between the seat plate and the force-bearing plate, and the side wall of the force-bearing plate on one side facing the seat plate is provided with two through holes, and the two through holes are respectively arranged at the two ends of the force-bearing plate, and bearings are fixedly arranged in the two through holes arranged on the force-bearing plate, and the inner walls of the two bearings arranged on the force-bearing plate are fixedly provided with worms perpendicular to the rotating shaft, and the two worms are meshed with the two worm wheels; the outer peripheries of the ends of the two worms away from the force-bearing plate are fixedly provided with a third gear, and the side wall of the force-bearing plate on one side facing the seat plate is also provided with a Two through holes are arranged, and the two through holes are respectively arranged at the two ends of the force-bearing plate, and bearings are fixedly arranged in the two through holes arranged on the force-bearing plate, and transmission shafts parallel to the worm are fixedly arranged on the inner walls of the two bearings arranged on the force-bearing plate, and an auxiliary plate is fixedly arranged on the bottom surface of one end of the seat plate away from the force-bearing plate, and two through holes are arranged on the side wall of the auxiliary plate facing the force-bearing plate, and bearings are fixedly arranged in the two through holes arranged on the auxiliary plate, and the other ends of the two transmission shafts are fixedly arranged on the inner walls of the two bearings arranged on the auxiliary plate, and the two transmission shafts are arranged below the worm, and the outer circumferences of the two transmission shafts are fixedly provided with fourth gears, and the third gear and the fourth gear located on the same side are meshed through racks;

[0009] The two transmission shafts are also fixedly provided with two first bevel gears on their outer circumferences, and the two first bevel gears on the same transmission shaft are arranged between the fourth gear and the auxiliary plate on the transmission shaft, and the base plate is provided with four first through holes, and the bottom surface of the base plate is provided with four bearings, and the inner walls of the four bearings arranged on the bottom surface of the base plate are fixedly provided with a first threaded rod, each of the first threaded rods is divided into a first smooth round rod section and a first threaded rod section, and the first smooth round rod section of each of the first threaded rods is respectively fixedly connected to the inner walls of the four bearings arranged on the bottom surface of the base plate and passes through the corresponding bearings, and the outer circumference of the rod section of each first threaded rod passing through the corresponding bearing arranged on the bottom surface of the base plate is fixedly provided with a second bevel gear, and the four first bevel gears are meshed with the four second bevel gears in a one-to-one manner, and the first threaded rod section of each of the first threaded rods is respectively passed through the four first through holes, and the outer circumference of the rod section of each first threaded rod passing through each first through hole is threadedly connected with a first threaded sleeve, and an auxiliary base plate is fixedly provided on the top of the four first threaded sleeves;

[0010] A third bevel gear is fixedly provided on the outer circumference of the two transmission shafts. The third bevel gear on the same transmission shaft is arranged between the two first bevel gears on the transmission shaft. Square second through holes are also arranged on both sides of the seat plate. Bearings are arranged on both sides of the bottom surface of the seat plate. Second threaded rods are fixedly provided on the inner walls of the two bearings arranged on the bottom surface of the seat plate. Each of the second threaded rods is divided into a second smooth round rod section and a second threaded rod section. The second smooth round rod section of each of the second threaded rods is respectively fixedly connected to the inner walls of the two bearings arranged on the bottom surface of the seat plate and passes through a pair of The corresponding bearings, each second threaded rod passing through the corresponding bearing has a fourth bevel gear fixedly arranged on the outer periphery of the rod segment, the two fourth bevel gears mesh with the four third bevel gears one by one, the second threaded rod segment of each of the second threaded rods passes through the four second through holes respectively, and the outer periphery of the rod segment of each second threaded rod passing through each second through hole is threadedly connected with a second threaded sleeve, the auxiliary seat plate is provided with third through holes on both sides, the two second threaded sleeves are respectively vertically slidably arranged in the two third through holes, and the tops of the two second threaded sleeves are fixed with handrail plates;

[0011] The two transmission shafts are respectively threaded with moving blocks, and connecting blocks are fixedly provided on the two moving blocks facing opposite side walls. An extension rod parallel to the transmission shaft is fixedly provided on the two connecting blocks. The two extension rods are arranged between the two transmission shafts, and a connecting rod is rotatably provided between the ends of the two extension rods away from the connecting blocks, and a supporting plate is fixedly provided on the outer periphery of the connecting rod.

[0012] Working principle:

[0013] The device includes two states: working state and leisure state. In the working state, the angle between the backrest and the seat plate is 90°, and the locking assembly locks the backrest, which is also the initial state of the device; in the leisure state, the angle between the backrest and the seat plate is greater than 90°.

[0014] When the working state needs to be switched to the leisure state, in the initial state, the angle between the backrest and the seat plate is 90°; when in use, the rotating rod is rotated, and the rotation of the rotating rod drives the first gear, the second gear, and the rotating shaft to rotate, and the rotation of the rotating shaft drives the backrest to rotate;

[0015] The rotation of the rotating shaft drives the two worm wheels to rotate at the same time, and the rotation of the two worm wheels respectively drives the two worm screws meshing with the two worm wheels to rotate, and the rotation of the two worm screws simultaneously drives the corresponding third gear to rotate, and the rotation of the two third gears respectively drives the corresponding racks to rotate, and the rotation of the two racks respectively drives the corresponding fourth gear and the transmission shaft to rotate, and the rotation of the two transmission shafts respectively drives the two first bevel gears on each transmission shaft to rotate, and the rotation of each first bevel gear respectively drives the corresponding second bevel gear and the first threaded rod to rotate, and the rotation of each first threaded rod respectively drives the corresponding first threaded sleeve to move vertically downward in the corresponding first through hole, and the vertical downward movement of the four first threaded sleeves drives the auxiliary seat plate to move vertically downward toward the seat plate;

[0016] The rotation of the two transmission shafts simultaneously drives the two third bevel gears to rotate respectively, the rotation of the two third bevel gears drives the corresponding fourth bevel gears and the second threaded rod to rotate respectively, the rotation of the two second threaded rods drives the corresponding second threaded sleeves to move vertically downward in the corresponding third through holes and second through holes respectively, and the vertical downward movement of the two second threaded sleeves drives the corresponding armrest plates to move vertically downward toward the seat plate respectively;

[0017] The rotation of the two transmission shafts simultaneously drives the two moving blocks to move toward the auxiliary plate, the movement of the two moving blocks respectively drives the two connecting blocks to move toward the auxiliary plate, the movement of the two connecting blocks drives the extension rod to move toward the auxiliary plate, and the movement of the extension rod drives the supporting plate to extend out of the side of the seat plate.

[0018] Beneficial effects:

[0019] 1. By arranging a mounting plate, a rotating rod, a first gear, a rotating shaft, a second gear, a worm wheel, a force plate, a worm, a third gear, a transmission shaft, an auxiliary plate, a fourth gear, a rack, a first bevel gear, a first through hole, a first threaded rod, a second bevel gear, a first threaded sleeve, an auxiliary seat plate, a third bevel gear, a second through hole, a second threaded rod, a fourth bevel gear, a second threaded sleeve, an armrest plate, a moving block, a connecting block, an extension rod, a connecting rod, and a supporting plate, by rotating the rotating rod, under the linkage action of each component, the backrest is rotated, the auxiliary seat plate is vertically moved downward toward the seat plate, the armrest plate is vertically moved downward toward the seat plate, and the supporting plate extends out of the side of the seat plate, thereby avoiding the tediousness of the user's need to adjust in steps, and improving the working efficiency of the device switching from a working state to a leisure state;

[0020] 2. The device is provided with an auxiliary seat plate that moves vertically downward toward the seat plate as the backrest rotates, so that when the user uses the office chair in a lying position, the overall center of gravity of the office chair moves downward, thereby improving the overall stability of the office chair;

[0021] 3. The device is provided with an armrest that moves vertically downward with the rotation of the backrest, so that the height of the armrest can be reduced as the center of gravity moves downward after the backrest rotates, so that when the user wants to stand up after lying down, it is convenient for the user to contact the armrest, thereby facilitating the user to stand up;

[0022] 4. The device is provided with a support plate which extends out from the side of the seat plate as the backrest rotates, so that when the user uses the office chair in a lying position, the user can place the legs on the support plate to provide support for the legs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure in which the protective cover is removed;

[0025] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure after the middle backrest is rotated 90° counterclockwise;

[0026] Figure 4 for Figure 1 A schematic diagram of the structure from above without the armrest, auxiliary seat plate and backrest;

[0027] Figure 5 It is a schematic diagram of the structure of the backrest.

[0028] In the above drawings: seat plate 1, backrest 2, first working plate 201, second working plate 202, third working plate 203, chair leg 3, mounting plate 4, rotating rod 5, first gear 6, rotating shaft 7, second gear 8, worm gear 9, force plate 10, worm 11, third gear 12, transmission shaft 13, auxiliary plate 14, fourth gear 15, rack 16, first bevel gear 17, first threaded rod 18, second bevel gear 19, first threaded sleeve 20, auxiliary seat plate 21, third bevel gear 22, second threaded rod 23, fourth bevel gear 24, second threaded sleeve 25, armrest plate 26, moving block 27, extension rod 28, connecting rod 29, supporting plate 30, first positioning block 31, second positioning block 32, protective cover 33, knob 34, first through hole 35, second through hole 36, third through hole 37, connecting block 38, locking rod 39, locking hole 40. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] Example:

[0031] like Figure 1 to Figure 4 As shown, an office chair for sitting and lying includes a seat plate 1, a backrest 2 rotatably arranged on the top of the seat plate 1, and chair legs 3 arranged at the bottom of the seat plate 1. The left and right sides of the seat plate 1 are fixedly provided with mounting plates 4, wherein a side wall of one mounting plate 4 away from the seat plate 1 is provided with a through hole, a bearing is fixedly arranged in the through hole on the mounting plate 4, and a rotating rod 5 is fixedly arranged on the inner wall of the bearing on the mounting plate 4. The rotating rod 5 passes through the outer periphery of the rod section of the mounting plate 4 and is fixed with a first gear 6. A rotating shaft 7 parallel to the rotating rod 5 is rotatably arranged between the two mounting plates 4. The rotating shaft 7 is arranged at one end of the two mounting plates 4 away from the seat plate 1, and the outer periphery of the rod section of the rotating shaft 7 passing through the side wall of the mounting plate 4 is fixed with a second gear 8. The first gear 6 is meshed with the second gear 8. The backrest 2 is fixedly arranged on the outer periphery of the rotating shaft 7. A locking assembly is arranged on the rotating rod 5, and the locking assembly is used to make the rotating rod 5 and the mounting plate 4 relatively stationary.

[0032] The rotating shaft 7 is arranged on the outer periphery of the rod section between the two mounting plates 4, and two worm gears 9 are fixedly arranged. A force-bearing plate 10 is also fixedly arranged between the two mounting plates 4. The force-bearing plate 10 is fixedly arranged at the ends of the two mounting plates 4 away from the seat plate 1. The rotating shaft 7 is arranged between the seat plate 1 and the force-bearing plate 10. The side wall of the force-bearing plate 10 facing the seat plate 1 is provided with two through holes, and the two through holes are respectively arranged at the two ends of the force-bearing plate 10. Bearings are fixedly arranged in the two through holes arranged on the force-bearing plate 10. The inner walls of the two bearings arranged on the force-bearing plate 10 are fixedly provided with worms 11 perpendicular to the rotating shaft 7. The two worms 11 are meshed with the two worm gears 9; the outer peripheries of the ends of the two worms 11 away from the force-bearing plates 10 are fixedly provided with third gears 12. The side wall of the force-bearing plate 10 facing the seat plate 1 is also provided with There are two through holes, which are respectively arranged at the two ends of the force-bearing plate 10, and bearings are also fixed in the two through holes arranged on the force-bearing plate 10. The inner walls of the two bearings arranged on the force-bearing plate 10 are fixed with transmission shafts 13 parallel to the worm 11. An auxiliary plate 14 is fixed to the bottom surface of one end of the seat plate 1 away from the force-bearing plate 10, and the side wall of the auxiliary plate 14 facing the force-bearing plate 10 is provided with two through holes, and bearings are fixed in the two through holes arranged on the auxiliary plate 14. The other ends of the two transmission shafts 13 are fixed to the inner walls of the two bearings arranged on the auxiliary plate 14, and the two transmission shafts 13 are arranged below the worm 11. The outer periphery of the two transmission shafts 13 is fixed with a fourth gear 15, and the third gear 12 and the fourth gear 15 located on the same side are meshed through a rack 16;

[0033] Two first bevel gears 17 are fixedly arranged on the outer circumference of the two transmission shafts 13. The two first bevel gears 17 on the same transmission shaft 13 are arranged between the fourth gear 15 and the auxiliary plate 14 on the transmission shaft 13. Four first through holes 35 are arranged on the seat plate 1. Four bearings are arranged on the bottom surface of the seat plate 1. The inner walls of the four bearings arranged on the bottom surface of the seat plate 1 are fixedly arranged with first threaded rods 18. Each of the first threaded rods 18 is divided into a first smooth round rod section and a first threaded rod section. The first smooth round rod section of each of the first threaded rods 18 is respectively connected to the first smooth round rod section arranged on the seat plate 1. The inner walls of the four bearings on the bottom surface of the plate 1 are fixedly connected and penetrated by the corresponding bearings. The outer periphery of the rod section of each first threaded rod 18 that penetrates the corresponding bearing arranged on the bottom surface of the seat plate 1 is fixedly provided with a second bevel gear 19. The four first bevel gears 17 are meshed with the four second bevel gears 19 one by one. The first threaded rod section of each of the first threaded rods 18 penetrates through four first through holes 35 respectively, and the outer periphery of the rod section of each first threaded rod 18 that penetrates through each first through hole 35 is threadedly connected with a first threaded sleeve 20. An auxiliary seat plate 21 is fixedly provided on the top of the four first threaded sleeves 20.

[0034] The outer circumferences of the two transmission shafts 13 are also fixedly provided with a third bevel gear 22. The third bevel gear 22 located on the same transmission shaft 13 is arranged between the two first bevel gears 17 on the transmission shaft 13. Square second through holes 36 are also arranged on both sides of the seat plate 1. Bearings are arranged on both sides of the bottom surface of the seat plate 1. The inner walls of the two bearings arranged on the bottom surface of the seat plate 1 are fixedly provided with second threaded rods 23. Each of the second threaded rods 23 is divided into a second smooth round rod section and a second threaded rod section. The second smooth round rod section of each of the second threaded rods 23 is respectively fixedly connected to the inner walls of the two bearings arranged on the bottom surface of the seat plate 1 and passes through the corresponding bearings. Each second threaded rod 23 passes through the corresponding A fourth bevel gear 24 is fixedly provided on the outer periphery of the rod segment of the corresponding bearing, and the two fourth bevel gears 24 mesh with the four third bevel gears 22 in a one-to-one correspondence. The second threaded rod segment of each of the second threaded rods 23 is respectively penetrated through four second through holes 36, and the outer periphery of the rod segment of each second threaded rod 23 penetrated through each second through hole 36 is threadedly connected with a second threaded sleeve 25, and the second threaded sleeve 25 is a rectangular parallelepiped structure. Square third through holes 37 are provided on both sides of the auxiliary seat plate 21, and the two second threaded sleeves 25 are respectively vertically slidably provided in the two third through holes 37, and the tops of the two second threaded sleeves 25 penetrated through the two third through holes 37 are fixed with handrail plates 26;

[0035] The two transmission shafts 13 are respectively threadedly connected with moving blocks 27, and connecting blocks 38 are fixedly provided on the side walls facing opposite sides of the two moving blocks 27. An extension rod 28 parallel to the transmission shaft 13 is fixedly provided on the two connecting blocks 38. The two extension rods 28 are arranged between the two transmission shafts 13, and a connecting rod 29 is rotatably provided between the ends of the two extension rods 28 away from the connecting blocks 38. The two opposite side surfaces of the two extension rods 28 are provided with through holes, and bearings are fixedly provided in the through holes on the two extension rods 28. The connecting rod 29 is fixedly provided on the inner walls of the bearings on the two extension rods 28, and a supporting plate 30 is fixedly provided on the outer periphery of the connecting rod 29.

[0036] By arranging a mounting plate 4, a rotating rod 5, a first gear 6, a rotating shaft 7, a second gear 8, a worm wheel 9, a force plate 10, a worm 11, a third gear 12, a transmission shaft 13, an auxiliary plate 14, a fourth gear 15, a rack 16, a first bevel gear 17, a first through hole 35, a first threaded rod 18, a second bevel gear 19, a first threaded sleeve 20, an auxiliary seat plate 21, a third bevel gear 22, a second through hole 36, a second threaded rod 23, a fourth bevel gear 24, a second threaded The sleeve 25, the armrest plate 26, the moving block 27, the connecting block 38, the extension rod 28, the connecting rod 29, and the supporting plate 30, by rotating the rotating rod 5, under the linkage effect of each component, the backrest 2 is rotated, the auxiliary seat plate 21 moves vertically downward toward the seat plate 1, the armrest plate 26 moves vertically downward toward the seat plate 1, and the supporting plate 30 extends out of the side of the seat plate 1, thereby avoiding the tedious step-by-step adjustment required by the user, and improving the working efficiency of the device switching from the working state to the leisure state;

[0037] The device is provided with an auxiliary seat plate 21 that moves vertically downward toward the seat plate 1 as the backrest 2 rotates, so that when the user uses the office chair in a lying position, the overall center of gravity of the office chair moves downward, thereby improving the overall stability of the office chair; the device is provided with an armrest plate 26 that moves vertically downward as the backrest 2 rotates, so that the height of the armrest plate 26 moves downward as the center of gravity moves downward after the backrest 2 rotates, thereby facilitating the user to contact the armrest plate 26 when he wants to stand up after using the office chair in a lying position, thereby facilitating the user to stand up with the help of force; the device is provided with a support plate 30 that extends out from the side of the seat plate 1 as the backrest 2 rotates, so that when the user uses the office chair in a lying position, he can place his legs on the support plate 30 to support the legs.

[0038] like Figure 5 As shown, the backrest 2 includes a first working plate 201, a second working plate 202 fixed to the side of the first working plate 201 close to the seat plate 1, two third working plates 203 fixed to both sides of the second working plate 202, and the two third working plates 203 are fixed to the outer periphery of the rotating shaft 7. This is a specific installation method of the backrest 2, and the second working plate 202 is always arranged on the side of the worm gear 9 facing the user after the backrest 2 rotates, thereby preventing the worm gear 9 from contacting the user's back when the user leans on the backrest 2, causing the hair to be caught or touching the user's exposed skin, etc., causing harm to the user.

[0039] like Figure 1 to Figure 4 As shown, a first positioning block 31 is fixedly disposed between the two extension rods 28, the first positioning block 31 is disposed at one end away from the connecting block 38, and the first positioning block 31 is disposed below the connecting rod 29. The first positioning block 31 can support the supporting plate 30 and locate the position of the supporting plate 30.

[0040] like Figure 4 As shown, a second positioning block 32 is fixedly disposed between the two extension rods 28, and the second positioning block 32 is disposed on the side of the connecting rod 29 away from the end of the extension rod 28. After the supporting plate 30 rotates 180° counterclockwise, the second positioning block 32 can support the supporting plate 30 and locate the position of the supporting plate 30.

[0041] like Figure 1 As shown, a protective cover 33 is fixedly arranged on the side wall of one of the mounting plates 4 away from the seat plate 1, and the protective cover 33 covers the first gear 6 and the second gear 8, and the rotating rod 5 rotates and passes through the side wall of the protective cover 33. The setting of the protective cover 33 can prevent the user's hair, skin, etc. from being caught, thereby avoiding safety accidents.

[0042] like Figure 1 As shown, the end of the rotating rod 5 that rotates and passes through the side wall of the protective cover 33 is fixed with a knob 34 with an external thread. The provision of the knob 34 can make it easier for the user to rotate the rotating rod 5. The locking assembly includes a locking rod 41, a through hole is provided on the knob 34, and a circle of locking holes 40 are provided on the side wall of the protective cover 33 facing the knob 34. The locking rod 41 is used to pass through the through hole and then pass into one of the locking holes 40 to lock the knob 34.

[0043] Working principle:

[0044] The device has two states: working state and leisure state. In the working state, the angle between the backrest 2 and the seat plate 1 is 90°, and the locking rod 39 is inserted into the through hole and one of the locking holes 40 to lock the knob 34 (such as Figure 1 In the leisure state, the angle between the backrest 2 and the seat plate 1 is greater than 90° (as shown in FIG. Figure 3 shown).

[0045] When it is necessary to switch the working state to the leisure state, in the initial state, the angle between the backrest 2 and the seat plate 1 is 90°, and the locking rod 39 is inserted into the through hole and one of the locking holes 40, the second positioning block 32 supports the supporting plate 30, and the supporting plate 30 does not extend out of the side of the seat plate 1; when in use, take out the locking rod 39, hold the knob 34 to rotate the rotating rod 5, the rotation of the rotating rod 5 drives the first gear 6, the second gear 8, and the rotating shaft 7 to rotate, and the rotation of the rotating shaft 7 drives the backrest 2 to rotate;

[0046] The rotation of the rotating shaft 7 simultaneously drives the two worm wheels 9 to rotate, and the rotation of the two worm wheels 9 respectively drives the two worms 11 meshing with the two worm wheels 9 to rotate, and the rotation of the two worms 11 simultaneously drives the corresponding third gear 12 to rotate, and the rotation of the two third gears 12 respectively drives the corresponding racks 16 to rotate, and the rotation of each rack 16 respectively drives the corresponding fourth gear 15 and the transmission shaft 13 to rotate, and the rotation of the two transmission shafts 13 respectively drives the two first bevel gears 17 on each transmission shaft 13 to rotate, and the rotation of each first bevel gear 17 respectively drives the corresponding second bevel gear 19 and the first threaded rod 18 to rotate, and the rotation of each first threaded rod 18 respectively drives the corresponding first threaded sleeve 20 to move vertically downward in the corresponding first through hole 35, and the vertical downward movement of the four first threaded sleeves 20 drives the auxiliary seat plate 21 to move vertically downward toward the seat plate 1;

[0047] The rotation of the two transmission shafts 13 simultaneously drives the two third bevel gears 22 to rotate respectively, and the rotation of the two third bevel gears 22 drives the corresponding fourth bevel gears 24 and the second threaded rod 23 to rotate respectively, and the rotation of the two second threaded rods 23 drives the corresponding second threaded sleeves 25 to move vertically downward in the corresponding third through holes 37 and second through holes 36 respectively, and the vertical downward movement of the two second threaded sleeves 25 drives the corresponding armrest plates 26 to move vertically downward toward the seat plate 1 respectively;

[0048] The rotation of the two transmission shafts 13 simultaneously drives the two moving blocks 27 to move toward the auxiliary plate 14, and the movement of the two moving blocks 27 drives the two connecting blocks 38 to move toward the auxiliary plate 14 respectively, and the movement of the two connecting blocks 38 drives the extension rod 28 to move toward the auxiliary plate 14, and the movement of the extension rod 28 drives the supporting plate 30 to extend out of the side of the seat plate 1, and then the supporting plate 30 is rotated 180° clockwise, so that the first positioning block 31 supports the supporting plate 30;

[0049] Finally, the locking rod 39 is inserted into the through hole and one of the locking holes 40 to lock the knob 34 .

[0050] Thus, the device is switched from a working state to a leisure state, and the user can lie on the device in a lying position and place the legs on the support plate 30 .

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An office chair for both sitting and lying, comprising a seat plate (1), a backrest (2) rotatably arranged on the top of the seat plate (1), and chair legs (3) arranged on the bottom of the seat plate (1), characterized in that: The seat plate (1) is fixedly provided with mounting plates (4) on both left and right sides, wherein a side wall of one mounting plate (4) away from the seat plate (1) is provided with a through hole, a bearing is fixedly provided in the through hole on the mounting plate (4), a rotating rod (5) is fixedly provided on the inner wall of the bearing on the mounting plate (4), the rotating rod (5) passes through the outer periphery of the rod section of the mounting plate (4) and is fixedly provided with a first gear (6), a rotating shaft (7) parallel to the rotating rod (5) is rotatably provided between the two mounting plates (4), the rotating shaft (7) is provided at one end of the two mounting plates (4) away from the seat plate (1), the outer periphery of the rod section of the rotating shaft (7) passing through the side wall of the mounting plate (4) and is fixedly provided with a second gear (8), the first gear (6) meshes with the second gear (8), the backrest (2) is fixedly provided on the outer periphery of the rotating shaft (7), and a locking assembly is provided on the rotating rod (5), the locking assembly is used to make the rotating rod (5) and the mounting plate (4) relatively stationary; The rotating shaft (7) is arranged between the two mounting plates (4), and two worm gears (9) are fixedly arranged on the outer periphery of the rod section. A force-bearing plate (10) is also fixedly arranged between the two mounting plates (4). The force-bearing plate (10) is fixedly arranged at the ends of the two mounting plates (4) away from the seat plate (1). The rotating shaft (7) is arranged between the seat plate (1) and the force-bearing plate (10). The side wall of the force-bearing plate (10) facing the seat plate (1) is provided with two through holes. The two ends of the force-bearing plate (10) are respectively provided with bearings in the two through holes provided on the force-bearing plate (10), and the inner walls of the two bearings provided on the force-bearing plate (10) are both provided with worms (11) perpendicular to the rotating shaft (7), and the two worms (11) are meshed with the two worm wheels (9); the outer peripheries of the ends of the two worms (11) away from the force-bearing plate (10) are both provided with third gears (12), and the force-bearing plate (10) is facing the side of the seat plate (1) The side wall is also provided with two through holes, which are respectively provided at the two ends of the force-bearing plate (10), and the two through holes provided on the force-bearing plate (10) are also fixed with bearings, and the inner walls of the two bearings provided on the force-bearing plate (10) are fixed with transmission shafts (13) parallel to the worm (11), and the bottom surface of one end of the seat plate (1) away from the force-bearing plate (10) is fixed with an auxiliary plate (14), and the auxiliary plate (14) is facing one end of the force-bearing plate (10). Two through holes are arranged on the side wall, and bearings are fixedly arranged in the two through holes arranged on the auxiliary plate (14). The other ends of the two transmission shafts (13) are fixedly arranged on the inner walls of the two bearings arranged on the auxiliary plate (14). The two transmission shafts (13) are arranged below the worm (11). The outer circumferences of the two transmission shafts (13) are fixedly arranged with fourth gears (15), and the third gear (12) and the fourth gear (15) located on the same side are meshed through a rack (16); Two first bevel gears (17) are fixedly arranged on the outer circumference of the two transmission shafts (13); the two first bevel gears (17) located on the same transmission shaft (13) are arranged between the fourth gear (15) and the auxiliary plate (14) on the transmission shaft (13); four first through holes (35) are arranged on the base plate (1); four bearings are arranged on the bottom surface of the base plate (1); the inner walls of the four bearings arranged on the bottom surface of the base plate (1) are fixedly arranged with first threaded rods (18); each of the first threaded rods (18) is divided into a first smooth round rod section and a first threaded rod section; the first smooth round rod section of each of the first threaded rods (18) is respectively connected to the first smooth round rod section arranged on the base plate (1); The inner walls of the four bearings on the bottom surface of the seat plate (1) are fixedly connected to and penetrated by corresponding bearings, and a second bevel gear (19) is fixedly arranged on the outer periphery of the rod section of each first threaded rod (18) that penetrates the corresponding bearing arranged on the bottom surface of the seat plate (1), and the four first bevel gears (17) are meshed with the four second bevel gears (19) in a one-to-one correspondence, and the first threaded rod section of each first threaded rod (18) penetrates through four first through holes (35) respectively, and the outer periphery of the rod section of each first threaded rod (18) that penetrates through each first through hole (35) is threadedly connected with a first threaded sleeve (20), and an auxiliary seat plate (21) is fixedly arranged on the top of the four first threaded sleeves (20); The outer circumferences of the two transmission shafts (13) are fixedly provided with third bevel gears (22); the third bevel gears (22) on the same transmission shaft (13) are arranged between the two first bevel gears (17) on the transmission shaft (13); square second through holes (36) are arranged on both sides of the base plate (1); bearings are arranged on both sides of the bottom surface of the base plate (1); the inner walls of the two bearings arranged on the bottom surface of the base plate (1) are fixedly provided with second threaded rods (23); each of the second threaded rods (23) is divided into a second smooth round rod section and a second threaded rod section; the second smooth round rod section of each of the second threaded rods (23) is respectively fixedly connected to the inner walls of the two bearings arranged on the bottom surface of the base plate (1) and passes through the corresponding bearings. , a fourth bevel gear (24) is fixedly arranged on the outer periphery of the rod section of each second threaded rod (23) passing through the corresponding bearing, and the two fourth bevel gears (24) are meshed with the four third bevel gears (22) in a one-to-one correspondence, and the second threaded rod section of each second threaded rod (23) passes through four second through holes (36) respectively, and the outer periphery of the rod section of each second threaded rod (23) passing through each second through hole (36) is threadedly connected with a second threaded sleeve (25), and third through holes (37) are arranged on both sides of the auxiliary seat plate (21), and the two second threaded sleeves (25) are respectively vertically slidably arranged in the two third through holes (37), and the tops of the two second threaded sleeves (25) are fixedly provided with handrail plates (26); The two transmission shafts (13) are respectively threadedly connected with moving blocks (27), and connecting blocks (38) are fixedly provided on the side walls facing opposite sides of the two moving blocks (27). An extension rod (28) parallel to the transmission shaft (13) is fixedly provided on the two connecting blocks (38). The two extension rods (28) are arranged between the two transmission shafts (13), and a connecting rod (29) is rotatably provided between the ends of the two extension rods (28) away from the connecting blocks (38), and a supporting plate (30) is fixedly provided on the outer periphery of the connecting rod (29).

2. The office chair for sitting and lying according to claim 1, characterized in that: The backrest (2) comprises a first working plate (201), a second working plate (202) arranged on a side of the first working plate (201) close to the seat plate (1), and two third working plates (203) arranged on both sides of the second working plate (202), wherein the two third working plates (203) are fixedly arranged on the outer periphery of the rotating shaft (7).

3. The office chair for sitting and lying according to claim 1, characterized in that: A first positioning block (31) is fixedly arranged between the two extension rods (28), the first positioning block (31) is arranged at an end away from the connecting block (38), and the first positioning block (31) is arranged below the connecting rod (29).

4. The office chair for sitting and lying according to claim 3, characterized in that: A second positioning block (32) is fixedly arranged between the two extension rods (28), and the second positioning block (32) is arranged on a side of the connecting rod (29) away from the end of the extension rod (28).

5. The office chair for sitting and lying according to claim 1, characterized in that: A protective cover (33) is fixedly provided on a side wall of one of the mounting plates (4) away from the seat plate (1), wherein the protective cover (33) covers the first gear (6) and the second gear (8) therein, and the rotating rod (5) rotates through the side wall of the protective cover (33).

6. The office chair for sitting and lying according to claim 5, characterized in that: A knob (34) with external threads is fixedly provided at the end of the rotating rod (5) that rotates and passes through the side wall of the protective cover (33).

7. The office chair for sitting and lying according to claim 6, characterized in that: The locking assembly comprises a locking rod (39), the knob (34) is provided with a through hole, the side wall of the protective cover (33) facing the knob (34) is provided with a circle of locking holes (40), and the locking rod (39) is used to penetrate through the through hole and then penetrate into one of the locking holes (40) to lock the knob (34).

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