WO2012000139A1

WO2012000139A1 - Chair chassis with adjusting leaning force

Info

Publication number: WO2012000139A1
Application number: PCT/CN2010/001001
Authority: WO
Inventors: 陈千奎
Original assignee: Chen Qiankui
Priority date: 2010-07-02
Filing date: 2010-07-02
Publication date: 2012-01-05

Abstract

A chair chassis with adjusting leaning force belongs to the technical field of chair assembly. A pin (19) extending upwards is formed on a mounting plate (5) of the chassis between a left lug (8) and a right lug (9). A spring seat (4) is provided with a jack (20) accommodating the pin of the mounting plate, and the thickness of the jack is larger than the thickness of the pin in the front-back direction of a middle plate (1). The width of the jack loosely matches with the pin in the left-right direction of the middle plate (1). A regulating bolt (21), which in turn passes through a large plate (3), the middle plate, the spring seat and the mounting plate in a casing (6) from top to bottom, matches with a worm wheel (7) by coaxial threads. A spiral spring (22) is sleeved on the part of regulating bolt that is below the upper bottom (4-1) of the spring seat and above the mounting plate, the lower end of the spring abuts against the upper surface of the mounting plate, and the upper end of the spring abuts against the inner surface of the upper bottom of the spring seat. The leaning force of the chassis can be adjusted conveniently by the spring, with saving time and labor as well as stable reliability.

Description

Seat chassis with adjustable tilting force

Technical field

The invention relates to a seat pan with adjustable reclining force, belonging to the technical field of chair assemblies.

Background technique

A lifting and reclining chair chassis (publication number: CN2922618), which consists of an upper plate, a middle plate and a knob. The knob is fixed on the upper plate by a carriage screw, and the dust cover, the washer and the spring are mounted on the middle plate. U-shaped iron is arranged on the middle plate, the U-shaped support frame is connected with the back steel plate seat and the upper plate, the back steel plate seat is connected to the middle plate by rivets, and the U-shaped support frame is connected with the back steel plate seat by rivets. A lifting pump is arranged on the middle plate. A lifting control device is mounted on one side of the upper plate of the chair, and the upper plate and the middle plate are connected by rivets and bearings. When the chair is tilted, the spring acts as a resetting action for reclining the chair, but if the elastic force of the spring is adjusted to adjust the resetting force of the spring to tilt the chair, the above technical solution needs to lean over and turn the knob to Adjusting the upper and lower positions of the knob on the carriage screw, thereby adjusting the degree of compression of the spring to adjust the resetting force of the spring on the chair, which is inconvenient to operate and more laborious.

Summary of the invention

The invention solves the problem that the spring adjustment operation of the tilting chair chassis provided by the existing tilting chair chassis is inconvenient, time-consuming and laborious, and the like, and provides a tilting force spring adjusting operation convenient, saving time and labor, and the adjusting mechanism is stable and reliable. Seat chassis with tilting force.

The above technical object of the present invention is mainly solved by the following technical solutions: It comprises a middle plate for connecting with a gas pressure bar and a large plate connected to the middle plate through a horizontally disposed rotating shaft and located above the middle plate, the large plate is used for the seat Connecting, the rear portion of the large disk can swing downward relative to the middle plate about the rotating shaft, and the spring seat, the mounting plate and the cover body are sequentially arranged from the top to the bottom of the front portion of the middle plate, and the spring seat has an upper bottom and a lower opening The inverted cup-shaped structure, the outer surface of the upper bottom of the spring seat is in contact with the lower surface of the middle plate, and the cover body has an upright cup-like structure having an upper opening and a lower bottom, and the mounting plate is located in the cover body With cover The body is fixed, and a worm wheel is disposed between the lower bottom of the cover body and the mounting plate, and the worm wheel is rotatable relative to the cover body and the mounting plate about its own axis, and the mounting plate is formed perpendicular to the mounting plate main body corresponding to the circumferential side of the worm wheel and a downwardly extending left lug and a right lug, the worm meshing with the worm wheel is rotatably supported between the left lug and the right lug, and one end of the handle extends from the outside of the cover into the cover body and is connected to the worm, and the mounting plate corresponds to An upwardly extending pin is formed between the left lug and the right lug, and the spring seat is formed with a socket for inserting the pin of the mounting plate, the thickness of the jack along the front and rear direction of the middle plate is greater than the thickness of the pin, the jack The width along the left and right sides of the middle plate cooperates with the clearance of the pin. The adjusting bolt passes through the large plate, the middle plate, the spring seat and the mounting plate in the cover body from top to bottom, and then matches the worm wheel through the coaxial thread. The adjusting bolt corresponds to a coil spring is disposed on a portion below the bottom of the spring seat and above the mounting plate, and a lower end of the coil spring abuts on a surface of the mounting plate, and an upper end of the coil spring abuts on a bottom portion of the spring seat Surface. Wherein, the axial position between the cover body, the worm wheel and the mounting plate is relatively fixed, and the transmission connection between the handle and the worm is carried out. When the handle is rotated, the worm drive can be driven, and the worm wheel drives the worm wheel to rotate, and the worm wheel is along the axis direction of the adjustment bolt. Move up or down to move the mounting plate fixed to the cover with a cover up or down, thereby changing the axial distance between the plane on the mounting plate and the inner plane of the bottom of the spring seat, that is, adjusting the coil spring The axial length is adjusted to adjust the degree of compression of the coil spring, and then the purpose of adjusting the tilting force of the coil spring to the chair is achieved. During operation, the user does not need to lean over, just hold the hand to the side of the chair and hold the handle If, the operation is very convenient, and saves time and effort. In addition, the pin formed on the mounting plate is matched with the jack on the spring seat, and the width of the jack is matched with the pin gap in the left-right direction of the middle plate, thereby preventing the left and right swing between the mounting plate and the spring seat, due to the upper bottom of the spring seat The outer surface abuts against the lower surface of the middle plate, and the mounting plate and the cover body are fixed to each other, thereby preventing the left and right direction of the swing between the cover and the middle plate, and preventing the upper and lower swings of the handle, so that the spring seat and the spiral are The structure of the adjusting mechanism composed of the spring, the mounting plate, the worm wheel, the worm, the cover body and the handle is more stable and reliable; on the other hand, the thickness of the jack in the front-rear direction of the middle plate is larger than the thickness of the pin, so that the mounting plate and the spring seat can be used. The front and rear directions can be moved relative to each other, and then the front and rear yaw of the adjustment bolt axis can be realized to ensure the flexible tilt of the large disc.

, Outer surface of the upper end of optimal Yi, spring ¾ 'luxury seat as Yuri Yu ^ & cases, sightseeing ΐ plate ^Bian: The face is formed with a plurality of first through holes that match the protrusions. Wherein, the outer surface of the bottom portion of the spring seat and the lower surface of the middle plate are matched by the protrusion and the first through hole, which can prevent the relative swing between the spring seat and the middle plate, thereby ensuring the stability of the adjusting mechanism.

Preferably, the lower surface of the intermediate plate is formed with a convex ring coaxial with the spring seat, and the bottom portion of the spring seat is formed with a third through hole that matches the outer diameter of the convex ring. The convex ring on the lower surface of the middle plate can be matched with the third through hole at the bottom of the spring seat to further improve the reliable positioning between the spring seat and the middle plate; on the other hand, the convex ring on the lower surface of the middle plate can play The radial positioning of the coil spring avoids the radial offset of the coil spring and improves the stability of the adjustment mechanism.

Preferably, the left lug and the right lug are respectively formed with a second through hole coaxial with the worm, and a space formed by the left lug, the right lug and the mounting plate body is provided with a U-shaped support plate, U-shaped Both ends of the support plate are formed with arcuate grooves that are rotatably supported at both ends of the worm. Wherein, the second through hole on the left and right lugs of the mounting plate body can pass through the end of the handle, and the U-shaped supporting plate can rotate the worm to facilitate the assembly of the worm.

Preferably, the worm is provided with a hexagon socket hole coaxial with the worm, and the cover body is respectively provided with a fourth through hole for the end of the handle to pass through the positions of the two ends of the worm, and the end of the handle and the worm drive connection An outer hexagonal structure is formed which matches the hexagonal hole of the worm. Wherein, the hex and the hexagonal structure are matched between the worm and the handle to facilitate the assembly of the handle and the worm, and only the outer hexagon structure of the handle is inserted into the hexagonal hole of the worm; and the cover corresponds to the worm The four through holes are respectively disposed at the positions of the two ends, so that the handle can be inserted into the fourth hexagonal hole to fit the hexagonal hole of the worm, so that the handle can be located on the left side of the chair or on the right side of the chair, thereby Meet the needs of different locations.

Preferably, the outer hexagonal structure of the handle passes through the hexagonal hole of the worm and the limit screw is mounted at the end of the outer hexagonal structure of the handle. The diameter of the cap portion of the limiting screw is larger than the maximum diameter of the hexagonal hole of the worm. Among them, by setting a limit screw at the end of the outer hexagon structure of the handle, the outer hexagon structure of the handle can be prevented from coming out of the inner hexagonal hole of the worm, and the assembly, disassembly and maintenance of the handle are also facilitated.

Preferably, the worm wheel is embedded with a nut coaxial thereto, and the adjusting bolt passes through the nut The engagement is achieved with a coaxial thread between the worm gear; the nut has a plurality of internal threads, and the adjustment bolt has a plurality of external threads that match the multiple internal threads of the nut. Among them, the nut can be embedded in the worm wheel to achieve the threading fit with the adjusting bolt, or the thread can be directly threaded in the center hole of the worm wheel to realize the threading of the adjusting bolt and the worm wheel, thereby simplifying the thread matching between the worm wheel and the adjusting bolt. Structure; and the use of multi-head internal and external threads between the nut and the adjusting bolt can make the worm wheel move axially in the adjusting bolt under the worm, and improve the adjusting speed.

Preferably, the upper and lower ends of the coil spring are respectively formed with a grinding plane, so that both ends of the coil spring are in flat contact with the lower surface of the middle plate and the surface of the mounting plate to prevent the spring from shaking.

Preferably, the adjusting bolt passes through the mounting plate to form at least one anti-rotation plane portion, and the anti-rotation plane portion is parallel to the axis of the adjusting bolt, and correspondingly, the mounting plate is formed with the same cross section as the adjusting bolt. perforation. Wherein, the adjusting bolt is matched with the perforation on the mounting plate through the anti-rotation plane portion, which can effectively prevent the relative rotation between the adjusting bolt and the mounting plate, thereby ensuring that the adjusting bolt and the mounting plate are not rotated when the worm wheel rotates, thereby realizing The worm wheel moves up and down along the axis of the adjustment bolt. Wherein, the number of anti-rotation plane portions may be one, two, three, or even more.

Therefore, the invention has the characteristics that the tilting force spring is convenient to adjust, saves time and labor, and the adjusting mechanism is stable and reliable.

DRAWINGS

Figure 1 is a schematic view showing an assembly structure of the present invention;

Figure 2 is a schematic exploded view of the present invention;

Figure 3 is a schematic cross-sectional view of the present invention.

Best practice

The technical solutions of the present invention will be further specifically described below by way of embodiments and with reference to the accompanying drawings. Embodiment 1 : As shown in FIG. 1 , FIG. 2 and FIG. 3 , a middle disc 1 for connecting with a gas pressure bar and a large disc 3 connected to the intermediate disc 1 via a horizontally disposed rotating shaft 2 and located above the middle disc, 'large disc Use noon The seat base is connected, the rear portion of the large tray 3 is swingable downward relative to the middle disc 1 around the rotating shaft 2, and the spring seat 4, the mounting plate 5 and the cover body 6 are arranged from the top to the bottom of the middle plate 1 in sequence, and the spring seat is provided. 4 is a cup-shaped structure having an inverted bottom 4-1 and a lower opening 4-2, the outer surface of the upper bottom 4-1 of the spring seat 4 is in contact with the lower surface of the middle plate 1, and the upper bottom of the spring seat 4 is The surface is formed with four protrusions 4-3, and the lower surface of the middle plate 1 is formed with four first through holes 1-1 matching the protrusions 4-3; the lower surface of the middle plate 1 is formed with the spring seat 4 The convex ring 1-2 of the shaft, the bottom portion of the spring seat 4 is formed with a third through hole 4-4 matching the outer diameter of the convex ring 1-2.

The cover 6 has an upright cup-like structure having an upper opening 6-1 and a lower bottom 6-2. The mounting plate 5 is located in the cover 6 and fixed to the cover 6, and the lower bottom 6-2 of the cover 6 is mounted. A worm wheel 7 is disposed between the plates 5, and the worm wheel 7 is rotatable relative to the cover body 6 and the mounting plate 5 about its own axis. The mounting plate 5 is formed on the circumferential side of the worm wheel 7 to be perpendicular to the body of the mounting plate 5 and extends downward. The left lug 8 and the right lug 9, the worm 10 meshing with the worm wheel 7 is rotatably supported between the left lug 8 and the right lug 9, and the left lug 8 and the right lug 9 are respectively formed coaxially with the worm 10 a second through hole 11, a space formed by the left lug 8, the right lug 9 and the main body of the mounting plate 5 is provided with a U-shaped support plate 12, and both ends of the U-shaped support plate 12 are formed to be rotatably supported at both ends of the worm The curved recess 13 has one end of the handle 14 extending from the cover 6 into the cover 6 and drivingly connected with the worm 10. The worm 7 is provided with a hexagonal hole 15 coaxial with the worm 7 itself, and the handle 14 is connected to the worm 10 One end of the handle is formed with an outer hexagonal structure 16 matching the hexagonal hole 15 of the worm 7, and the outer hexagonal structure of the handle 14 passes through the hexagonal hole 15 of the worm 7 and the outer hexagon of the handle 14 The end of the structure is mounted with a limiting screw 17, the diameter of the cap portion of the limiting screw 17 is larger than the maximum diameter of the hexagonal hole 15 of the worm 7, and the cover 6 is respectively provided at the position of the two ends of the worm 7 for the end of the handle 14 to pass. The fourth through hole 18. The mounting plate 5 is formed with an upwardly extending pin 19 formed between the left lug 8 and the right lug 9. The spring seat 4 is formed with a socket 20 through which the pin 19 of the mounting plate 5 can be inserted. The thickness of the disk 1 in the front-rear direction (the direction of the arrow A in FIG. 3) is larger than the thickness of the pin 20, and the width of the jack 20 in the left-right direction of the middle disk (in the direction of the arrow B in FIG. 2) is matched with the pin 19, and the adjusting bolt 21 is self-adjusted. The top and bottom passes through the large plate 3, the middle plate 1, the spring seat 4 and the mounting plate 5 in the cover 6 and then the worm wheel 7 is matched by the coaxial multi-head crepe adjustment screw 31 corresponding to the upper bottom of the spring seat 4 and below. Mounting plate 5 or more The portion is sleeved with a coil spring 22, the lower end of the coil spring 22 abuts against the upper surface of the mounting plate 5, and the upper end of the coil spring 22 abuts against the inner surface of the upper bottom of the spring seat 4, and the upper and lower ends of the coil spring 22 are respectively formed There is a grinding plane, and an anti-rotation plane portion 23 is formed at a portion of the adjusting bolt 21 passing through the mounting plate 5, and the anti-rotation plane portion 23 is parallel to the axis of the adjusting bolt 21, and accordingly, the mounting plate 5 is formed with the same cross-section as the adjusting bolt 21. Perforation.

Embodiment 2: The difference from Embodiment 1 is that a nut coaxial with the worm wheel is embedded in the worm wheel, and the adjusting bolt is matched with the coaxial thread of the worm wheel by the cooperation with the nut, and the nut has a multi-head internal thread. The adjustment bolt has a multi-head external thread that mates with a plurality of internal threads of the nut. The rest of the structure is the same as in the first embodiment.

Through the transmission connection between the handle and the worm, the worm drive can be driven when the handle is rotated, the worm drive rotates the worm wheel, and the worm wheel moves up or down along the axis of the adjustment bolt, so that the mounting plate fixed to the cover body is up or Moving downward, thereby changing the axial distance between the plane on the mounting plate and the inner plane of the bottom of the spring seat, that is, adjusting the axial length of the coil spring to adjust the compression degree of the coil spring, and then adjusting the coil spring to tilt the chair The purpose of force. During operation, the user does not need to lean over, just extend the hand to the side of the chair and hold the handle to rotate. The operation is very convenient and saves time and effort. In addition, the pin formed on the mounting plate is matched with the jack on the spring seat, and the width of the jack is matched with the pin gap in the left-right direction of the middle plate, thereby preventing the left and right swing between the mounting plate and the spring seat, due to the upper bottom of the spring seat The outer surface abuts against the lower surface of the middle plate, and the mounting plate and the cover body are fixed to each other, thereby preventing the left and right direction of the swing between the cover and the middle plate, and preventing the upper and lower swings of the handle, so that the spring seat and the spiral are The structure of the adjusting mechanism composed of the spring, the mounting plate, the worm wheel, the worm, the cover body and the handle is more stable and reliable; on the other hand, the thickness of the jack in the front-rear direction of the middle plate is larger than the thickness of the pin to enable the mounting plate and the spring seat The front and rear directions can be moved relative to each other, and then the front and rear yaw of the adjustment bolt axis can be realized to ensure the flexible tilt of the large disc.

Claims

Rights request

1. A seat chassis with adjustable reclining force, comprising a middle plate for connecting with a gas pressure bar and a large plate connected to the middle plate through a horizontally disposed rotating shaft and located above the middle plate, the large plate being used for connecting with the seat frame, The rear portion of the large disk is swingable downward relative to the middle plate about the rotating shaft, and is characterized in that: a spring seat, a mounting plate and a cover body are sequentially arranged from the top to the bottom of the front portion of the middle plate, and the spring seat has an upper bottom portion and An inverted open cup-shaped structure of the lower opening, the outer surface of the upper bottom of the spring seat is in contact with the lower surface of the middle plate, the cover body having an upright cup-like structure having an upper opening and a lower bottom, the mounting plate being located in the cover The body is fixed to the cover body, and a worm wheel is disposed between the lower bottom of the cover body and the mounting plate, and the worm wheel is rotatable relative to the cover body and the mounting plate about its own axis, and the mounting plate is formed and mounted corresponding to the circumferential side of the worm wheel. a left and a right lug extending vertically and downwardly from the plate body, and a worm meshing with the worm wheel is rotatably supported between the left lug and the right lug, and one end of the handle extends from the outside of the cover into the cover body and is connected to the worm. installation The plate is formed with an upwardly extending pin corresponding to the left lug and the right lug, and the spring seat is formed with a socket for inserting the pin of the mounting plate, and the thickness of the jack along the front and rear direction of the middle plate is greater than the thickness of the pin The width of the jack along the left and right direction of the middle plate is matched with the gap of the pin. The adjusting bolt passes through the large plate, the middle plate, the spring seat and the mounting plate in the cover body from top to bottom, and then matches the worm wheel through the coaxial thread, and the adjusting bolt is adjusted. A coil spring is disposed corresponding to a portion below the bottom of the spring seat and above the mounting plate, and a lower end of the coil spring abuts on a surface of the mounting plate, and an upper end of the coil spring abuts against an inner surface of the bottom portion of the spring seat.

2. The adjustable reclining seat chassis according to claim 1, wherein the upper bottom outer surface of the spring seat is formed with a plurality of protrusions, and the lower surface of the middle plate is formed with a plurality of seats. The first through holes in which the protrusions are matched.

The seat pan of the adjustable reclining force according to claim 1 or 2, wherein the lower surface of the middle plate is formed with a convex ring coaxial with the spring seat, and the bottom portion of the spring seat is formed with The third through hole of the outer diameter of the convex ring is matched.

The adjustable tilting seat chassis according to claim 1 or 2, wherein the left and right lugs are respectively formed with a second through hole coaxial with the worm, the left lug , right lug and mounting plate A u-shaped support plate is disposed in the space formed by the body, and both ends of the U-shaped support plate are formed with arcuate grooves that are rotatably supported at both ends of the worm.

The seat pan of the adjustable reclining force according to claim 1 or 2, wherein the worm is provided with a hexagonal hole coaxial with the worm, and the cover is respectively provided corresponding to the positions of the two ends of the worm There is a fourth through hole for the end of the handle to pass, and one end of the handle and the worm drive connection is formed with an outer hexagonal structure matching the hexagonal hole of the worm.

6. The adjustable reclining seat chassis according to claim 5, wherein the outer hexagonal structure of the handle is passed through a hexagonal hole of the worm, and a limit screw is mounted at an end of the outer hexagon structure of the handle. The diameter of the cap of the limit screw is larger than the maximum diameter of the hexagonal hole of the worm.

The seat pan of the adjustable reclining force according to claim 1 or 2, wherein the worm wheel is embedded with a nut coaxial thereto, and the adjusting bolt is realized by cooperation with the nut and the worm wheel Match the coaxial threads between them.

8. The adjustable reclining seat chassis of claim 7 wherein said nut has a plurality of internal threads and said adjustment bolt has a plurality of external threads that mate with a plurality of internal threads of the nut.

The seat pan of the adjustable reclining force according to claim 1 or 2, characterized in that the upper and lower ends of the spiral spring are respectively formed with a grinding plane.

The seat cushion of the adjustable reclining force according to claim 1 or 2, wherein the adjusting bolt passes through the mounting plate to form at least one anti-rotation plane portion, and the anti-rotation plane portion is The axes of the adjusting bolts are parallel, and correspondingly the mounting plates are formed with the same perforations as the cross section of the adjusting bolts.