CN102133003A - A swivel chair structure with stepless tilt adjustment - Google Patents

Abstract

A swivel chair structure with stepless inclination adjustment comprises a seat plate and a backrest, wherein a chassis is fixedly installed at the bottom of the seat plate, the backrest is movably hinged with the chassis in an inclination backward manner through a tail plate, at least one inclination adjustment elastic plate is fixedly bridged at the front end and the rear end of the chassis in the length extension direction, the tail plate is in pressure connection with the rear end of the inclination adjustment elastic plate through a transverse rod, a worm is fixed at the front end of the chassis, a worm gear box capable of sliding forwards and backwards along the worm is sleeved on the worm, a sliding fulcrum seat abutting against the bottom end of the inclination adjustment elastic plate is extended at the bottom of the worm gear box, the sliding fulcrum seat can slide in the length extension direction of the inclination adjustment elastic plate, an adjustment handle for adjusting the worm gear box to slide forwards and backwards along the worm is further connected to one side of the worm gear box, the structure is simple, the adjustable angle is large, the adjustment handle is matched and connected with the worm gear box and the worm, so that the adjustment of the rotation adjustment handle is moderate, and the comfort, the adjustment of the swivel chair is more humanized.

Description

A swivel chair structure with stepless tilt adjustment

technical field

The invention relates to a swivel chair structure, in particular to a swivel chair structure with simple structure and good use effect with stepless tilt adjustment.

Background technique

At present, the existing swivel chair can adjust its backrest tilting angle to meet people's different sitting postures and lying needs. On January 19, 2009, the Chinese invention patent announced on December 30, 2009 changed the force on the backrest of the swivel chair through the principle of compressing the spring. The adjustment range of the tilt adjustment of the swivel chair structure is very limited, and it needs The adjustment pressure is high, and the manufacturing cost is high; moreover, the user needs to spend a lot of effort to complete the adjustment of the backrest tilt when rotating the adjustment handle, which does not meet the needs of the swivel chair for comfort and humanized development.

Contents of the invention

In order to overcome the deficiencies of existing swivel chair backrest inclination angle adjustment devices, the purpose is to provide a swivel chair structure with simple and compact structure, large inclination adjustment angle, and smooth handle adjustment with stepless inclination adjustment.

The technical solution adopted by the present invention to solve the technical problem is: a swivel chair structure with stepless reclining adjustment, including a seat board and a backrest, a chassis is fixedly installed on the bottom of the seat board, and the backrest moves backwards through the tailboard and the chassis. Hinged, it is characterized in that, the front and rear ends of the chassis along the direction of its length extension are fixedly connected with at least one tilt adjustment spring plate, the tail plate is crimped with the rear end of the tilt adjustment spring plate through a transverse rod, and the front end of the chassis The worm is fixed, and the worm is covered with a worm gear box that can slide forward and backward along the worm. The bottom of the worm gear box is extended with a sliding fulcrum seat that is offset against the bottom of the tilt adjustment spring plate. The sliding fulcrum seat can adjust the spring plate along the tilt. The length extension direction of the worm gear box slides, and one side of the worm gear box is also connected with an adjustment handle for adjusting the worm gear box to slide forward and backward along the worm. The tilt adjustment structure of the swivel chair backrest adopts this structure. The tilt adjustment spring plate and the sliding fulcrum seat that can move forward and backward at the bottom of the tilt adjustment spring plate are arranged on the chassis, and the tilt adjustment spring plate is connected with the tail plate connected to the backrest. , using the inversely proportional relationship between the force and the moment arm, when the adjustment handle is turned, the worm gear box drives the sliding fulcrum seat to slide along the worm to the front end of the chassis, at this time the moment arm between the rear end of the tilt adjustment spring plate and the sliding fulcrum seat is The longest one, on the contrary, you can apply the minimum pressure to adjust the reclining of the backrest, and the reclining adjustment angle of the backrest is the largest; on the contrary, when the worm gear box drives the sliding fulcrum seat to slide along the worm to the rearmost end of the chassis, the reclining angle is at this time. The moment arm between the rear end of the spring board and the sliding fulcrum seat is the shortest, it can withstand the largest pressure, and the adjustable angle of the backrest is the smallest. It is connected with the worm, so the adjustment of the rotating adjustment handle is moderate, which effectively improves the comfort of the swivel chair during use and makes the adjustment of the swivel chair more humanized.

The object of the present invention can also be solved by adopting the following technical measures: the front and rear ends of the chassis along the direction of its length extension are fixedly connected with two tilting adjustment spring plates, and the worm and the worm gear box are arranged on the two tilting adjustment spring plates. Between them, two reclining adjustment spring plates are respectively arranged on both sides of the chassis, so that the force between the backrest and the chassis is more uniform and reasonable, and effectively prolongs the service life of the swivel chair.

The bottom of the worm gear box is fixed with a sliding fulcrum seat, which extends along the bottom ends of the two tilt adjustment spring plates and touches them. When sliding against each other, the resistance is reduced, and it also plays a good role as a fulcrum support.

The bottom end of the sliding fulcrum seat extends with a limit boss, and a limit groove is opened on the chassis corresponding to the limit boss, and the limit boss extends into the limit groove and can move forward and backward along the limit groove, which is conducive to sliding The fulcrum seat is not easy to deviate when sliding, and at the same time plays the role of front and rear end limiters, and is also convenient for assembly and positioning, making the structure more compact and reasonable.

The front end of the chassis is bent with a longitudinal baffle, and there is a flat hole for insertion on the longitudinal baffle. The baffle is locked and fixed, and the longitudinal baffle is conveniently plugged and hinged with the front end of the tilt adjustment spring plate. At the same time, it is also convenient for the fixed connection of the worm. The nut wrench at one end of the worm is locked at the end of the longitudinal baffle, and the connection is convenient and compact.

The two sides of the rear end of the chassis are provided with tilting limiting bosses, and the corresponding tail plate is provided with an arc-shaped limiting hole cooperating with the tilting limiting bosses, which enhances the compactness of the structure and facilitates installation and positioning.

The worm gear and the planetary gear meshed with each other are installed in the worm gear box, the worm is inserted through the worm gear box and connected with the worm gear by sliding and screwing, one end of the adjustment handle extends into the worm gear box and an adjustment gear is provided, and the adjustment gear is meshed with the planetary gear. The traditional worm gear box and worm structure has a simple, compact, reasonable structure, low cost, smooth connection and adjustment, and can better realize the stepless adjustment of the backrest tilt adjustment.

The outer end of the adjustment handle is provided with a handle head, which conforms to the shape of a human hand and is convenient for holding the handle.

The tail board is connected with the backrest through an L-shaped connecting board.

The bottom of the seat plate is fixed with front and rear connecting frames, and the ends of the front and rear connecting frames are respectively connected with the base and the outer plate of the tail plate.

The spring plate for tilt adjustment is in the shape of a thin plate made of plastic material or metal material.

The beneficial effects of the present invention are: the swivel chair structure of the present invention with stepless reclining adjustment, a bridge-type reclining regulating spring plate and a sliding fulcrum seat that can move forward and backward at the bottom of the reclining regulating spring plate are arranged on the chassis, and the reclining can be adjusted The rear end of the spring plate is connected to the tail plate connected to the backrest, and the force is inversely proportional to the force arm. When the adjustment handle is turned, the worm gear box drives the sliding fulcrum seat to slide along the worm to the front end of the chassis. At this time, the tilt adjustment spring plate The moment arm between the end and the sliding fulcrum seat is the longest. On the contrary, the backrest can be adjusted by applying the minimum pressure, and the tilting adjustment angle of the backrest is the largest; on the contrary, the worm gear box drives the sliding fulcrum seat along the worm When sliding to the rearmost end of the chassis, the moment arm between the rear end of the reclining spring plate and the sliding fulcrum seat is the shortest, and the reclining adjustment angle of the backrest is also the smallest. Level angle adjustment, large adjustable angle, the adjustment handle is connected with the worm gear box and the worm, so the adjustment of the rotation adjustment handle is moderate, which effectively improves the comfort of the swivel chair and makes the adjustment of the swivel chair more humanized.

Description of drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of the structure after removing the seat plate in the present invention.

Fig. 3 is a structural schematic diagram of removing the backrest in the present invention.

Fig. 4 is a schematic diagram of the structure of the present invention after some components are removed.

Fig. 5 is a schematic diagram of the structure of the present invention after some components are removed.

Fig. 6 is a schematic structural diagram of another embodiment of the present invention.

FIG. 7 is a structural schematic diagram from another angle relative to FIG. 6 .

Fig. 8 is a schematic structural view of removing the backrest in another embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Refer to Fig. 1 to Fig. 5, a swivel chair structure with stepless reclining adjustment, including a seat board 1 and a backrest 2, a chassis 3 is fixedly installed on the bottom of the seat board 1, and the backrest 2 and the chassis 3 are tilted backward through the tail board 4 Actively hinged, the front and rear ends of the chassis 3 along the direction of its length extension are fixedly spanned with at least one tilt adjustment spring plate 5, and the tail plate 4 is crimped with the rear end 501 of the tilt adjustment spring plate 5 through a transverse rod 6 The front end of the chassis 3 is fixed with a worm 7, the worm 7 is covered with a worm gear box 8 that can slide forward and backward along the worm 7, and the bottom of the worm gear box 8 is extended with a sliding fulcrum seat 9 that is offset against the bottom end of the tilt adjustment spring plate 5, The sliding fulcrum seat 9 can slide along the length extension direction of the tilt adjustment elastic plate 5, and one side of the worm gear box 8 is also connected with an adjusting handle 10 for adjusting the worm gear box 8 to slide forward and backward along the worm screw 7.

As a more specific implementation, further:

The front and rear ends of the chassis 3 along the direction of its length extension are fixedly connected with two tilting adjustment spring plates 5, and the worm 7 and the worm gear box 8 are arranged between the two tilting adjustment spring plates 5. The elastic plates 5 are arranged on both sides of the chassis 3, so that the stress between the backrest 2 and the chassis 3 is more even and reasonable, and effectively prolongs the service life of the swivel chair.

The bottom of the worm gear box 8 is fixed with a sliding fulcrum seat 9, which extends along the bottom ends of the two reclining spring plates 5 and opposes each other. When the bottom of the reclining adjustment elastic plate 5 slides against each other, the resistance is reduced, and it also plays a good supporting role as a fulcrum.

The bottom end of the sliding fulcrum seat 9 extends a limiting boss 902, and a limiting groove 301 is opened on the chassis 3 corresponding to the limiting boss 902, and the limiting boss 902 extends into the limiting groove 301 and can be moved along the limiting groove 301. Moving forward and backward is beneficial to the sliding fulcrum seat 9, which is not easy to deviate when sliding, and plays the role of front and rear end limiters at the same time, and is also convenient for assembly and positioning, making the structure more compact and reasonable.

The front end of the chassis 3 is bent with a longitudinal baffle 302, and the longitudinal baffle 302 is provided with an insertion flat hole 302-a. Fixed connection, one end of the worm 7 is locked and fixed with the longitudinal baffle 302 through the nut wrench 11, the longitudinal baffle 302 is convenient to be plugged and hinged with the front end 502 of the tilt adjustment spring plate 5, and also facilitates the fixed connection of the worm 7, the worm 7. The nut wrench 11 at one end is locked on one end of the longitudinal baffle 302, and the connection is convenient and compact.

Both sides of the rear end of the chassis 3 are provided with tilting limit post 303, and the corresponding tail plate 4 is provided with an arc-shaped limit hole 401 that is connected with the tilt limit post 303, which strengthens the compactness of the structure and facilitates Installation positioning.

A worm gear 801 and a planetary gear 802 meshing with each other are installed in the worm gear box 8, the worm screw 7 is inserted through the worm gear box 8 and slid and screwed with the worm gear 801, and one end of the adjustment handle 10 extends into the worm gear box 8 and is provided with an adjustment gear 1001, The adjustment gear 1001 is meshed with the planetary gear 802, and adopts the traditional structure of the worm gear box 8 and the worm 7. Its structure is simple, compact, reasonable, low in cost, smooth in connection and adjustment, and can better realize the stepless adjustment of backrest tilt adjustment .

The outer end of the adjusting handle 10 is provided with a handle head 1002, and the handle head 1002 conforms to the concavo-convex setting of the human hand shape, which is convenient for holding the handle to rotate.

The tailboard 4 is connected with the backrest 2 through the L-shaped connecting plate 12 .

The bottom of the seat plate 1 is fixed with front and rear connecting frames 101, 102, and the ends 101-a, 102-a of the front and rear connecting frames 101, 102 are respectively connected with the chassis 3 and the outer panel of the tail plate 4.

The reclining adjustment elastic plate 5 is a thin plate made of plastic material or metal material.

Working principle: when in use, turn the adjustment handle 10, and the worm gear box 8 drives the sliding fulcrum seat 9 to slide along the worm 7 to the front end of the chassis 3, at this time, the force between the rear end 501 of the spring plate 5 and the sliding fulcrum seat 9 is adjusted by tilting. The arm is the largest, and contrary to the force arm, the backrest 2 can be tilted and adjusted by applying the smallest pressure, and the tilting adjustment angle of the backrest 2 is the largest; on the contrary, the worm gear box 8 drives the sliding fulcrum seat 9 to slide along the worm 7 When the rear end of the chassis 3 is reached, the moment arm between the rear end of the reclining spring plate 5 and the sliding fulcrum seat 9 is the smallest, and the tolerable reclining pressure of the backrest 2 is the largest at this time, so the backrest 2 The reclining adjustment angle is also the smallest. Its structure is simple and the adjustable angle is large. The adjustment handle 10 is connected with the worm gear box 8 and the worm screw 7, so the adjustment of the rotation adjustment handle 10 is moderate, which effectively improves the comfort of the swivel chair when it is used. The swivel chair adjustment is more user-friendly.

As a further extended embodiment of the tilt adjustment structure of the present invention, the combination of the tilt adjustment spring plate, sliding fulcrum seat, worm and worm gear box structure can be applied to the backrest structure, and its implementation is similar to the above-mentioned embodiment, except that As shown in Figure 6 to Figure 7, the specific implementation is as follows:

A swivel chair back structure with stepless tilt adjustment, including a fixed seat a1 connected to the chassis of the swivel chair, the fixed seat includes longitudinal/transverse extension plates a101, a102, and the rear end of the transverse extension plate a102 has a slot a102-1, The bottom end a201 of at least one reclining adjustment spring plate a2 is fixedly inserted into the slot a102-1, its top a202 extends along the height direction of the longitudinal extension plate a101 and is fixedly connected to the bottom end a301 of the backrest a3, and the front end of the transverse extension plate a102 A worm a4 is fixed longitudinally, and a sliding fulcrum seat a5 is connected to the worm a4. The front end of the sliding fulcrum seat a5 is slidably connected to the worm a4 through the worm gear box a6. The chute a501 inside the spring plate a2 is connected to the outside of the chute a501 with a transverse bar a502 that slides close to the end face of the tilt adjustment spring plate a2, and the side of the worm gear box a6 is also connected to the side of the worm gear box a6 that slides up and down along the worm a4 Adjust handle a7.

As a further improvement of this embodiment, the bottom a201 of the three reclining adjustment spring plates a2 is fixedly inserted into the slot a102-1, and the three reclining adjustment spring plates a2 are close to the longitudinally extending plate a101 and extend along the longitudinal direction. The extension plate a101 extends in the height direction, and the top a202 of the three reclining adjustment spring plates a2 is fixedly connected with the bottom end a301 of the backrest a3.

The end surface of the reclining spring plate a2 close to the bottom end a201 is fixedly connected to the longitudinally extending plate a101 in the form of a screw hole a8 to strengthen the connection.

Two connecting lugs a503 and a504 are arranged on both sides of the rear end of the sliding fulcrum seat a5, and the two ends of the cylindrical transverse bar a502 are connected with the two connecting lugs a503 and a504, and the connection between the two connecting lugs a503 and a504 and the transverse bar a502 The chute a501 is formed between them, and the cylindrical transverse rod a502 is adopted. Since the end surface is arc-shaped, it is convenient to reduce resistance when sliding against the end surface of the tilt adjustment spring plate a2, and it also plays a good supporting role as a fulcrum.

Working principle: When in use, turn the adjustment handle, and the sliding fulcrum seat a5 slides down along the worm a4 under the drive of the worm gear box a6 to approach the top surface of the horizontal extension plate a102, and at this time, the top a202 of the tilting adjustment elastic plate a2 reaches the sliding fulcrum The moment arm between the transverse bars a502 of the seat a5 is the longest, on the contrary, the backrest a3 can be tilted and adjusted by applying the minimum pressure, and the tilting adjustment angle of the backrest a3 is the largest; on the contrary, the worm gear box a6 drives the sliding When the fulcrum seat a5 slides upwards along the worm screw a4 to the bottom end a301 of the backrest a3, the moment arm between the top a202 of the reclining spring plate a2 and the transverse bar a502 of the sliding fulcrum seat a5 is the shortest, and it can withstand the largest pressure. The backrest a3 has the smallest tilting adjustment angle. Its structure is simple, and the adjustable angle span is large. The adjustment handle a7 is connected with the worm box a6 and the worm a4 to realize stepless adjustment, and the adjustment of the rotation adjustment handle a7 is moderate and effective. Improve the comfort when using the swivel chair, and make the adjustment of the swivel chair more humanized.

The structural schemes of the above two implementation modes can be used in combination at the same time, or can be used separately.

The specific embodiments described above are only preferred embodiments of the present invention, and all equivalent designs made according to the patent scope of the utility model should be covered by the technology of the present invention.

Claims (10)

1. swivel chair structure that stepless reclining is regulated, comprise seat board (1) and backrest (2), seat board (1) bottom is installed with chassis (3), backrest (2) is the hypsokinesis backstroke by tailgate (4) and chassis (3) and is movably hinged, it is characterized in that, before its length bearing of trend of upper edge, described chassis (3), the rear end fixed span is connected at least one reclining and regulates diving board (5), tailgate (4) is regulated diving board (5) rear end (501) crimping by transverse bar (6) and reclining, chassis (3) front end is fixed with worm screw (7), being arranged with on the worm screw (7) can be preceding along worm screw (7), the worm gear case (8) that slides in the back, worm gear case (8) bottom is extended with reclining and regulates the sliding fulcrum seat (9) that diving board (5) bottom offsets, this sliding fulcrum seat (9) can be regulated the length bearing of trend slip of diving board (5) along reclining, and it is preceding along worm screw (7) that worm gear case (8) one sides also are connected with adjusting worm gear case (8), the regulating handle (10) that slides in the back.

2. the swivel chair structure that described stepless reclining is regulated according to claim 1, it is characterized in that: the front and back ends fixed span of its length bearing of trend of upper edge, described chassis (3) is connected to two reclinings and regulates diving board (5), and worm screw (7) and worm gear case (8) are arranged on two reclinings and regulate between the diving board (5).

3. according to the swivel chair structure of the described stepless reclining adjusting of claim 2, it is characterized in that: described worm gear case (8) bottom is fixed with sliding fulcrum seat (9), and sliding fulcrum seat (9) extends along two reclinings adjusting diving board (5) bottom and offsets.

4. the swivel chair structure that described stepless reclining is regulated according to claim 3, it is characterized in that: described sliding fulcrum seat (9) bottom is extended with positive stop lug boss (902), have stopper slot (301) on the chassis (3) of corresponding positive stop lug boss (902), positive stop lug boss (902) extends in the stopper slot (301) and can move along stopper slot (301) is forward and backward.

5. the swivel chair structure of regulating according to claim 1 or 2 described stepless reclinings, it is characterized in that: the curved longitudinal baffle (302) that is connected to of described chassis (3) front end, have the flat hole (302-a) of pegging graft on the longitudinal baffle (302), reclining adjusting diving board (5) front end (502) is plugged in the flat hole (302-a) of pegging graft affixed with chassis (3), and described worm screw (7) one ends are locked by nut spanner (11) and longitudinal baffle (302).

6. the swivel chair structure that described stepless reclining is regulated according to claim 1, it is characterized in that: both sides, rear end, described chassis (3) are provided with the spacing projection of reclining (303), have the arc spacing hole (401) that is connected with the spacing projection of reclining (303) on the corresponding tailgate (4).

7. the swivel chair structure that described stepless reclining is regulated according to claim 1, it is characterized in that: worm gear (801) and planetary gear (802) that mutual bridle joint is installed in the described worm gear case (8), worm screw (7) interted worm gear case (8) and worm gear (801) and slides and be spirally connected, regulating handle (10) one ends extend in the worm gear case (8) and are provided with adjusting gear (1001), and adjusting gear (1001) is connected with a joggle with planetary gear (802).

8. according to the swivel chair structure of claim 1 or 7 described stepless reclinings adjustings, it is characterized in that: described regulating handle (10) outer ends is provided with lever head (1002).

9. according to the swivel chair structure of the described stepless reclining adjusting of claim 1, it is characterized in that: described tailgate (4) is connected with backrest (2) by L type connecting plate (12).

10. the swivel chair structure that described stepless reclining is regulated according to claim 1, it is characterized in that: described seat board (1) bottom is fixed with forward and backward link (101,102), and forward and backward link (101,102) terminal (101-a, 102-a) is connected with tailgate (4) outer panel with chassis (3) respectively.

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