CN109864480B - Swivel chair and linkage mechanism of backrest and seat plate thereof - Google Patents
Swivel chair and linkage mechanism of backrest and seat plate thereof Download PDFInfo
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- CN109864480B CN109864480B CN201910177359.9A CN201910177359A CN109864480B CN 109864480 B CN109864480 B CN 109864480B CN 201910177359 A CN201910177359 A CN 201910177359A CN 109864480 B CN109864480 B CN 109864480B
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- 239000000725 suspension Substances 0.000 description 5
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- 239000011148 porous material Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000002347 injection Methods 0.000 description 1
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- 230000002040 relaxant effect Effects 0.000 description 1
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- 239000000243 solution Substances 0.000 description 1
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Abstract
The invention belongs to the technical field of swivel chairs, and particularly relates to a swivel chair and a linkage mechanism of a backrest and a seat plate of the swivel chair. It has solved the problem that prior art is with high costs. The linkage mechanism of the swivel chair backrest and the seat plate comprises a backrest and the seat plate, and also comprises a base, and a swinging frame hinged with the rear side of the upper surface of the base, wherein the swinging frame is obliquely arranged backwards and downwards, the lower side of the backrest is connected with the middle part of the swinging frame through a first hinge structure, the lower side of the backrest is connected with the lower side of the base through a second hinge structure, a tension spring piece for forcing the upper side of the swinging frame to have a downward movement trend and enabling the upper side of the swinging frame to be fit on the back of a human body is arranged between the upper side of the swinging frame and the base, the front side of the base is hinged with the rear side of a front linkage frame, the seat plate is positioned above the swinging frame and the front linkage frame, the upper side of the swinging frame is hinged with the rear side of the seat plate, and the front side of the front linkage frame is hinged with the front side of the seat plate. The invention has the advantages that: low cost and simple structure.
Description
Technical Field
The invention belongs to the technical field of swivel chairs, and particularly relates to a swivel chair and a linkage mechanism of a backrest and a seat plate of the swivel chair.
Background
Swivel chairs for use in resting or working of people.
In order to improve the comfort of the swivel chair, particularly the backrest is supported and attached to the back of a human body, the back of the traditional swivel chair cannot be adjusted in front and back positions, and only the backrest can be contacted by a person when the person leans backwards, so that the use comfort is poor.
Secondly, some swivel chairs are provided with leg support plates, and the conventional support plates are directly hinged to the front sides of the swivel chairs, so that the legs can be supported after the support plates are turned over when the swivel chairs are needed to be used. Although the above-mentioned scheme has many advantages, the above-mentioned scheme cannot be applied to different people, that is, the position of the support plate cannot be adjusted according to the length of the leg, and the practicality is reduced.
For this purpose, for example, chinese patent discloses a support device for a multifunctional swivel chair, application number: 201720472053.2, mainly in the field of chair fittings. Including hollow supporting shell, wear to establish the bracing piece in the supporting shell, establish the layer board that suits with the head above the bracing piece, set for the locating hole on the bracing piece, the locating hole includes last jack and the lower jack that sets gradually from top to bottom along the bracing piece, go up jack and lower jack homoenergetic and expose outside the supporting shell, still include the location inserted bar that suits with the locating hole, the backup pad is established to the supporting shell bottom, fang Shere dry open-ended decurrent U type runner support under the backup pad, runner support annular array arranges, the runner that suits with the swivel chair wheel is connected in the rotation on the runner support. The scheme has the beneficial effects that: can the person of facilitating the use rely on the swivel chair back, place the head on strutting arrangement, support the head, enlarge area of support, the user can relax the rest, improves the rest quality, can also adjust down the height and place in swivel chair the place ahead, make things convenient for the rest of relaxing of people's shank.
The above proposal can not realize the position adjustment of the backrest, and secondly, the supporting device has more complex structure and higher production cost.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object of the present invention is to provide a link mechanism for a swivel chair back and a seat plate, which can improve comfort in use.
Another object of the present invention is to provide a swivel chair that is simple in structure, more comfortable to use and simple in structure, and facilitates adjustment of leg support.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the linkage mechanism of the swivel chair backrest and the seat plate comprises a backrest and the seat plate, and also comprises a base, and a swinging frame hinged with the rear side of the upper surface of the base, wherein the swinging frame is obliquely arranged backwards and downwards, the lower side of the backrest is connected with the middle part of the swinging frame through a first hinge structure, the lower side of the backrest is connected with the lower side of the base through a second hinge structure, a tension spring piece for forcing the upper side of the swinging frame to have a downward movement trend and enabling the upper side of the swinging frame to be fit on the back of a human body is arranged between the upper side of the swinging frame and the base, the front side of the base is hinged with the rear side of a front linkage frame, the seat plate is positioned above the swinging frame and the front linkage frame, the upper side of the swinging frame is hinged with the rear side of the seat plate, and the front side of the front linkage frame is hinged with the front side of the seat plate.
Through many hinges to and swing frame and extension spring spare, can receive gravity and when the center of gravity changes at the seat, the back initiative of this moment is gone to paste at human back, and still paste at human back throughout, has not only improved the use travelling comfort, has still further enlarged application scope moreover, accords with current people's operation requirement.
In the linkage mechanism of the swivel chair backrest and the seat plate, the swing frame is of an inverted U-shaped structure, and the upper surface of the base is provided with a limiting device positioned in the swing frame, wherein the limiting device is used for preventing the upper side of the swing frame from excessively swinging downwards; and a control mechanism for locking and swinging the base and the swinging frame and canceling the locking between the base and the swinging frame is arranged between the base and the upper side of the swinging frame.
The swing frame swings back and forth along with gravity change, namely, the use comfort can be improved, and meanwhile, the limiting device and the control mechanism are arranged, so that the swing frame can be prevented from excessively swinging forwards and downwards and backwards, and the use safety can be ensured.
In the linkage mechanism of the swivel chair backrest and the seat plate, the control mechanism comprises locking through holes arranged on the left side and/or the right side of the swinging frame, a plurality of locking grooves are formed in the lower side hole wall of each locking through hole and distributed in a stepped mode, the left side or the right side of the base is provided with a control rotating rod in a penetrating mode, the inner end of the control rotating rod is connected with a connecting arm, and a locking rod capable of being clamped in any locking groove is fixed on the connecting arm.
The backrest can be locked at an angle through the control rotating rod, the locking rod and the locking groove, which is equivalent to the existing fixed backrest structure, and can further meet the use requirement.
The outer end of the control rotating rod is connected with a protruding part which can be conveniently held.
The locking groove is used in gear, which can facilitate the locking in different angles.
In the linkage mechanism of the swivel chair backrest and the seat plate, the inner end of the control rotating rod is connected with two connecting arms which are parallel to each other, the two connecting arms are positioned on the outer sides of the two surfaces of the left side or the right side of the swinging frame, the locking rod penetrates through the locking through hole, two ends of the locking rod penetrate through the locking through hole respectively, one end, far away from the control rotating rod, of the connecting arm is provided with the connecting arm locking structure between any connecting arm and the base.
Two linking arms are located the one end both sides of swing frame, can play control restriction, and simultaneously, two linking arms can improve the fixed stability of locking lever, namely, locking state's reliability, simultaneously, can also improve the reliability of canceling the locking.
In the linkage mechanism of the swivel chair backrest and the seat plate, the connecting arm locking structure comprises a fixed block arranged on the upper surface of the base and a U-shaped block sleeved on any connecting arm, a plurality of discrete spherical concave parts are arranged in the middle of the outer surface of the U-shaped block, a transverse hole is formed in one surface, close to the spherical concave part, of the fixed block, and a locking pin inserted into the transverse hole, one end of the transverse hole is aligned with one surface, provided with the spherical concave, of the connecting arm, one end of the locking pin is provided with an arc convex surface matched with the spherical concave, a spring is arranged between the other end of the locking pin and the transverse hole, and the spring forces one end, provided with the arc convex surface, of the locking pin to be inserted into the spherical concave when the locking pin is aligned with any spherical concave.
The spherical depressions in the present application are three and are distributed in an arch shape.
The locking pin cooperates with a spring, which can facilitate locking and cancel locking.
In the linkage mechanism of the swivel chair backrest and the seat plate, a positioning groove for controlling the inner end of the rotating rod to be placed in is formed in one side of the base, the inner end of the rotating rod is clamped in the positioning groove and is rotationally connected with the positioning groove, a Y-shaped sealing seat for sealing the notch of the positioning groove is arranged on the base, two connecting arms are arranged in the opening of the Y-shaped sealing seat, and the Y-shaped sealing seat is fixed on the base through a pressing plate.
The structure can ensure the stability of the fixing of the control rotating rod, and can improve the smoothness of the rotation of the control rotating rod when the control rotating rod rotates.
Secondly, the Y-shaped sealing seat has sealing reinforcement and a plurality of functions of limiting the connecting arm.
In the linkage mechanism of the swivel chair backrest and the seat plate, the first hinge structure comprises two hinge arms I which are parallel to each other, one end of each hinge arm I is fixed on the lower side of the backrest, and the other end of each hinge arm I is connected with the rear side of the base through a pin shaft I; the lower side of the backrest is provided with a fixed plate, and the first articulated arm is fixed at two ends of the fixed plate.
The first hinge arms are parallel to each other and are of a straight-line structure.
In the linkage mechanism of the swivel chair backrest and the seat plate, the second hinge structure comprises two hinge arms which are parallel to each other, a U-shaped plate positioned between the two hinge arms is arranged on the fixed plate, two ends of the U-shaped plate are respectively connected with one end of one hinge arm II through a hinge shaft I, and the other end of the hinge arm II is connected with the upper sides of two ends of the swinging frame through the hinge shaft II.
The two articulated arms are parallel to each other and have a V-shaped structure.
In the linkage mechanism of the swivel chair backrest and the seat plate, the upper side of the swinging frame is connected with two supporting arms which are parallel to each other and are connected with the rear side of the seat plate through a hinge shaft III.
The supporting arm is arranged obliquely upwards.
The swivel chair comprises a supporting leg component and a base connected to the supporting leg component, wherein a swinging frame is hinged to the rear side of the upper surface of the base, the swinging frame is obliquely arranged backwards and downwards, the lower side of a backrest is connected with the middle of the swinging frame through a first hinge structure, the lower side of the backrest is connected with the lower side of the base through a second hinge structure, a tension spring piece for forcing the upper side of the swinging frame to have a downward movement trend to enable the upper side of the swinging frame to be attached to the back of a human body is arranged between the upper side of the swinging frame and the base, the front side of the base is hinged to the rear side of a front linkage frame, a seat plate is positioned above the swinging frame and the front linkage frame, the upper side of the swinging frame is hinged to the rear side of the seat plate, the front side of the front linkage frame is hinged to the front side of the seat plate, handrails are respectively arranged on the left side and the right side of the seat plate, and a telescopic leg supporting mechanism is further arranged on the lower surface of the seat plate.
The telescopic leg supporting mechanism is located below the seat plate and comprises a fixed sliding seat fixed on the lower surface of the seat plate and a sliding adjusting plate horizontally and slidably connected with the fixed sliding seat, a rear limiting structure is arranged at the rear end of the sliding adjusting plate and used for preventing the sliding adjusting plate from being excessively separated from the fixed sliding seat forwards, a front limiting sleeve is sleeved at the front end of the sliding adjusting plate, a front limiting pin arranged at the front end of the sliding adjusting plate is blocked at the front side of the front limiting sleeve, a leg supporting hanging plate is hinged at the front side of the front limiting sleeve, a tension spring is arranged between the lower surface of the leg supporting hanging plate and the front limiting sleeve and forces the leg supporting hanging plate to be folded on the lower surface of the sliding adjusting plate, and the front limiting sleeve moves along the rear end of the sliding adjusting plate and can force the leg supporting hanging plate to swing upwards clockwise and the lower surface of the leg supporting hanging plate to be contacted with the upper surface of the sliding adjusting plate.
The rear limit structure includes a rear limit pin.
The fixed sliding seat is connected with the seat plate by a plurality of bolts.
The rear side of the leg support cantilever plate is provided with a notch, two sides of the front end of the front limiting sleeve are respectively provided with an outwardly extending pin shaft cylinder, each pin shaft cylinder is respectively provided with a pin in a penetrating manner, and the pins are inserted into pin holes at two sides of the notch, namely, the pins are in hinged connection.
Fixed slide and with fixed slide sliding connection's slip regulating plate, it can set up different length according to different crowds, not only simple structure, but also further improved the practicality, simultaneously, be convenient for adjust and the cost is lower.
The tension springs can fold the leg support hanging plates, and free swing of the leg support hanging plates after folding is avoided.
In the linkage mechanism of the swivel chair backrest and the seat plate, the fixed sliding seat is in a block shape, the lower side of the fixed sliding seat is provided with the connecting sliding groove which is arranged along the front-back direction of the fixed sliding seat, the notch of the connecting sliding groove faces downwards, the caliber of the notch of the connecting sliding groove is smaller than the width of the bottom of the connecting sliding groove, and the sliding adjusting plate is inserted into the connecting sliding groove, and the width of the sliding adjusting plate is equal to the caliber of the notch of the connecting sliding groove.
The structure can enhance the elastic performance of the structure, can be convenient to assemble and disassemble, and can prevent the caliber of the notch from falling off.
In the linkage mechanism of the swivel chair backrest and the seat plate, two sides of the connecting chute slot opening are provided with limiting convex parts which extend oppositely, and the connecting chute slot opening is formed between the two limiting convex parts.
Which can improve the overall structural strength.
In the linkage mechanism of the swivel chair backrest and the seat plate, a plurality of protrusions I are respectively arranged on two sides of the bottom of the connecting chute along the length direction of the connecting chute, protrusions II which are in one-to-one correspondence with the protrusions I are arranged on one surface of each limiting protrusion close to the bottom of the connecting chute, and the sliding adjusting plate is in sliding contact with the protrusions I and the protrusions II.
The structure can play a role in structural reinforcement and improving sliding smoothness, because the contact area is reduced.
In the linkage mechanism of the swivel chair backrest and the seat plate, the groove bottom of the connecting chute is provided with a groove body corresponding to the notch of the connecting chute.
The structure can facilitate demolding and save materials.
In the linkage mechanism of the swivel chair backrest and the seat plate, the inner wall of the front limiting sleeve is provided with the protrusion III arranged along the length direction of the front limiting sleeve, and the sliding adjusting plate is in sliding contact with the protrusion III.
There is the rectangular hole in the preceding stop collar, is equipped with a plurality of protruding third that set up along rectangular hole length direction on the last pore wall of rectangular hole and the pore wall down, and protruding third that sets up on the pore wall and protruding third one-to-one setting on the pore wall down.
In the linkage mechanism of the swivel chair backrest and the seat plate, the middle part of the front side of the front limiting sleeve is provided with an arc limiting notch for accommodating the front limiting pin; the front side of the lower surface of the front limiting sleeve is provided with a lower convex column, and the leg support hanging plate is contacted with the lower end of the lower convex column after being folded.
The arcuate limiting recess enlarges the contact area and at the same time avoids damage due to mutual impact.
In the linkage mechanism of the swivel chair backrest and the seat plate, the lower surface of the leg support suspension plate is provided with the tension spring column, one end of the tension spring is connected to the tension spring column, the other end of the tension spring is connected to the front limiting pin, and the front limiting pin and the tension spring column are positioned on the same straight line.
The structure can facilitate the installation and fixation of the tension spring.
In the linkage mechanism of the swivel chair backrest and the seat plate, the lower surface of the leg supporting suspending plate is provided with the U-shaped limiting plate, the opening of the U-shaped limiting plate faces the front limiting sleeve, at least one guide plate is connected to the inner middle part of the U-shaped limiting frame, the width of the guide plate is smaller than that of the U-shaped limiting plate, and when the lower surface of the leg supporting suspending plate is in contact with the upper surface of the sliding adjusting plate, the front end of the leg supporting suspending plate stretches into the U-shaped limiting plate, and the upper surface of the leg supporting suspending plate is in contact with the guide plate.
The U-shaped limiting plate can prevent the leg support cantilever plate from excessively moving towards the rear end of the sliding adjusting plate.
Compared with the prior art, the swivel chair and the linkage mechanism of the backrest and the seat plate thereof have the advantages that:
1. through many hinges to and swing frame and extension spring spare, can receive gravity and when the center of gravity changes at the seat, the back initiative of this moment is gone to paste at human back, and still paste at human back throughout, has not only improved the use travelling comfort, has still further enlarged application scope moreover, accords with current people's operation requirement.
2. Fixed slide and with fixed slide sliding connection's slip regulating plate, it can set up different length according to different crowds, not only simple structure, but also further improved the practicality, simultaneously, be convenient for adjust and the cost is lower.
3. Is convenient for popularization and application.
Drawings
Fig. 1 is a schematic view of a swivel chair according to the present invention.
FIG. 2 is a schematic view of the structure of the present invention with the support leg assembly removed
Fig. 3 is a schematic view of the structure of the invention with the seat and back removed.
Fig. 4 is a schematic view of the structure of fig. 3 with the front linkage frame removed.
Fig. 5 is a schematic view of a locking structure of a connecting arm according to the present invention.
Fig. 6 is a schematic diagram of a swing frame according to the present invention.
Fig. 7 is a schematic view of a leg support suspension board in a folded state.
Fig. 8 is a schematic side-elevation view of fig. 7.
Fig. 9 is a schematic structural view of a supporting mechanism provided by the present invention.
Fig. 10 is a schematic view of the leg support cantilever plate in a flattened state.
Fig. 11 is a schematic structural view of a fixed carriage according to the present invention.
Fig. 12 is a schematic view of a connection structure of a front stop collar and a leg support suspension plate provided by the invention.
In the drawing, a backrest 1, a housing 10, a limit notch 100, a first hinge arm 11, a first pin shaft 12, a fixed plate 13, a second hinge arm 14, a U-shaped plate 15, a base 2, a limiting device 21, a fixed block 22, a transverse hole 221, a U-shaped block 23, a spherical recess 231, a locking pin 24, an arc convex surface 241, a spring 25, a Y-shaped closing seat 26, a pressing plate 27, a swinging frame 3, a support arm 30, a locking through hole 31, a locking groove 311, a control rotating rod 32, a connecting arm 33, a locking rod 34, a tension spring 4, a front linkage frame 5, a support leg assembly 6, an armrest 7, a telescopic leg support mechanism a, a seat plate a1, a fixed slide seat a2, a connecting chute a21, a limiting convex part a22, a convex part a23, a convex part two a24, a groove body a25, a sliding adjusting plate a3, a front limiting pin a31, a rear limiting structure a32, a front limiting sleeve a4, a convex part three a41, an arc limiting notch a42, a lower convex post a43, a leg support plate a5, tension spring a51, a U-shaped guide plate 52 a6, and tension spring support plate a 52.
Detailed Description
The following are specific embodiments of the invention and the technical solutions of the invention will be further described with reference to the accompanying drawings, but the invention is not limited to these embodiments.
As shown in figures 1-4 of the drawings,
the linkage mechanism of the swivel chair backrest and the seat comprises a backrest 1, a seat a1, a base 2 and a swinging frame 3 hinged with the rear side of the upper surface of the base 2, wherein the swinging frame 3 is obliquely and backwards arranged downwards, the swinging frame 3 is of an inverted U-shaped structure, and the swinging frame 3 is made of a metal plate through bending.
The two sides of the lower end of the swinging frame 3 are fixed on the rear side of the upper surface of the base 2 through fixing pins.
The lower side of the backrest 1 is connected with the middle part of the swinging frame 3 through a first hinge structure, specifically, the first hinge structure of the embodiment comprises two hinge arms 11 which are parallel to each other, one end of each hinge arm 11 is fixed on the lower side of the backrest 1, and the other end of each hinge arm 11 is connected with the rear side of the base 2 through a first pin roll 12; a fixed plate 13 is arranged on the lower side of the backrest 1, and a first hinge arm 11 is fixed at two ends of the fixed plate 13.
The fixing plate 13 and the hinge arm one 11 are integrally formed and made of a metal plate material.
The lower side of the backrest 1 is connected with the lower side of the base 2 through a second hinge structure, specifically, the second hinge structure comprises two hinge arms 14 which are parallel to each other, a U-shaped plate 15 positioned between the two hinge arms 11 is arranged on the fixed plate 13, two ends of the U-shaped plate 15 are respectively connected with one end of one hinge arm 14 through a first hinge shaft, and the other end of the hinge arm 14 is connected with the upper sides of two ends of the swinging frame 3 through a second hinge shaft.
The U-shaped plate 15 is made of a metal plate material.
Two supporting arms 30 are connected to the upper side of the swinging frame 3, and the two supporting arms 30 are parallel to each other and connected to the rear side of the seat plate a1 through a hinge shaft III.
The support arm 30 is integrally formed with the swing frame 3.
A tension spring 4 for forcing the upper side of the swing frame 3 to have a downward movement trend is provided between the upper side of the swing frame 3 and the base 2 so as to attach the backrest 1 to the back of the human body, and the tension spring 4 in this embodiment has two tension spring 4 and two tension spring 4 are parallel to each other.
The tension spring piece 4 is obliquely arranged, and an included angle larger than 90 degrees is formed between the tension spring piece 4 and the swinging frame 3.
One end of the tension spring piece 4 is hooked in a tension spring hole on the upper side of the swinging frame 3, and the other end of the tension spring piece 4 is hooked in a tension spring coil on the upper surface of the base.
The base is also provided with an outer cover 10, a limiting gap 100 is reserved on the upper side of the outer cover 10, and when the supporting arm 30 swings downwards to be contacted with the bottom of the limiting gap 100, the supporting arm 30 swings to the limiting position.
The front side of the base 2 is hinged with the rear side of the front linkage frame 5, and the front side and the rear side are connected through a front hinge shaft.
The seating plate a1 is located above the swing frame 3 and the front link frame 5, and the upper side of the swing frame 3 is hinge-coupled with the rear side of the seating plate a1, i.e., the support arm 30 coupled to the upper side of the swing frame 3 is coupled with the rear side of the seating plate a1 through an upper hinge pin.
The front side of the front linkage frame 5 is hinged with the front side of the seat plate a 1. The two are connected through a hinge shaft body.
A restriction device 21 located in the swing frame 3 is provided on the upper surface of the base 2, specifically, the restriction device 21 is used for preventing the upper side of the swing frame 3 from excessively swinging downwards; the restricting device 21 of this embodiment includes an inverted U-shaped restricting frame provided on the upper surface of the base 2, and an inclined restricting surface in accordance with the inclined direction of the swing frame 3 is provided at the outer top of the inverted U-shaped restricting frame.
A control mechanism for locking and swinging the base 2 and the swinging frame 3 and canceling the locking between the base 2 and the swinging frame 3 is arranged between the base 2 and the upper side of the swinging frame 3. Specifically, the control mechanism of the present embodiment includes a locking through hole 31 disposed at the left side and/or the right side of the swing frame 3, a plurality of locking grooves 311 are disposed on the lower side wall of the locking through hole 31, the locking grooves 311 are distributed in a step-like manner, a control rotating rod 32 is disposed on the left side or the right side of the base 2 in a penetrating manner, a connecting arm 33 is connected to the inner end of the control rotating rod 32, and a locking rod 34 capable of being clamped in any one of the locking grooves 311 is fixed on the connecting arm 33.
Two connecting arms 33 which are parallel to each other are connected to the inner end of the control rotating rod 32, the two connecting arms 33 are located on the outer sides of the left side or the right side of the swinging frame 3, the locking rod 34 penetrates through the locking through hole 31, two ends of the locking rod 34 penetrate through one end, far away from the control rotating rod 32, of the connecting arm 33, and a connecting arm locking structure is arranged between any connecting arm 33 and the base 2.
Next, as shown in FIGS. 3-5,
the connecting arm locking structure of this embodiment includes a fixed block 22 disposed on the upper surface of the base 2, and a U-shaped block 23 sleeved on any one of the connecting arms 33, a plurality of spherical recesses 231 arranged discretely are disposed in the middle of the outer surface of the U-shaped block 23, a lateral hole 221 is disposed on a surface of the fixed block 22 adjacent to the spherical recess 231, and a locking pin 24 inserted into the lateral hole 221, one end of the lateral hole 221 is aligned with a surface of the connecting arm 33 provided with the spherical recess 231, one end of the locking pin 24 has an arc convex surface 241 matching with the spherical recess 231, a spring 25 is disposed between the other end of the locking pin 24 and the lateral hole 221, and the spring 25 forces one end of the locking pin 24 provided with the arc convex surface 241 to be inserted into the spherical recess 231 when the locking pin 24 is aligned with any one spherical recess 231.
A positioning groove for placing the inner end of the control rotating rod 32 is arranged on one side of the base 2, the inner end of the control rotating rod 32 is clamped in the positioning groove and is rotationally connected with the positioning groove, a Y-shaped sealing seat 26 for sealing the notch of the positioning groove is arranged on the base 2, two connecting arms 33 are arranged in the opening of the Y-shaped sealing seat 26, and the Y-shaped sealing seat 26 is fixed on the base 2 through a pressing plate 27. Screws are arranged at two ends of the pressing plate 27 in a penetrating mode, and the bolts are in threaded connection with the base.
In the present embodiment of the present invention, in the present embodiment,
when a person sits on the seat, the gravity center changes due to the front-back inclination of the person, the angle of the seat also changes, the angle of the swinging frame 3 also synchronously changes, the angle of the backrest also changes through the linkage of the first hinge structure and the second hinge structure, and the designed two tension spring pieces, namely the tension springs, can force the backrest to be actively attached to the back of the person.
As shown in figures 7-12 of the drawings,
the swivel chair comprises a supporting leg component 6 and a base 2 connected to the supporting leg component 6, wherein the rear side of the upper surface of the base 2 is hinged with a swinging frame 3, the swinging frame 3 is obliquely and backwards arranged downwards, the lower side of a backrest 1 is connected with the middle part of the swinging frame 3 through a first hinge structure, the lower side of the backrest 1 is connected with the lower side of the base 2 through a second hinge structure, a tension spring piece 4 for forcing the upper side of the swinging frame 3 to have a downward movement trend so as to attach the backrest 1 to the back of a human body is arranged between the upper side of the swinging frame 3 and the base 2, the front side of the base 2 is hinged with the rear side of a front linkage frame 5, the upper side of the swinging frame 3 is hinged with the rear side of the seat a1, the front side of the front linkage frame 5 is hinged with the front side of the seat a1, armrests 7 are respectively arranged on the left side and the right side of the seat a1, and a telescopic leg supporting mechanism a is further arranged on the lower surface of the seat a 1.
The telescopic leg support mechanism a is located below the seat plate a1, and comprises a fixed sliding seat a2 fixed on the lower surface of the seat plate a1 and a sliding adjusting plate a3 horizontally and slidably connected with the fixed sliding seat a2, wherein a rear limit structure a32 is arranged at the rear end of the sliding adjusting plate a3 and is used for preventing the sliding adjusting plate a3 from being excessively separated from the fixed sliding seat a2 forwards.
The sliding adjustment plate a3 is a strip-shaped plate made of a metallic material or a nonmetallic material.
The rear limit structure comprises a rear limit pin arranged at the rear end of the sliding adjusting plate a 3. When the rear limit pin contacts the rear side of the fixed slider a2, the retraction is described as being in place.
The front end of the sliding adjusting plate a3 is sleeved with a front limiting sleeve a4, a front limiting pin a31 is arranged at the front end of the sliding adjusting plate a3, the front limiting pin a31 is blocked on the front side of the front limiting sleeve a4, and the rear limiting pin and the front limiting pin a31 are parallel to each other.
The front side of the front limiting sleeve a4 is hinged with a leg supporting suspension plate a5, and the leg supporting suspension plate a5 is arched and made of plastic.
The leg support cantilever plate a5 is used for placing the legs when being unfolded.
A tension spring a6 is arranged between the lower surface of the leg support hanging plate a5 and the front limiting sleeve a4, the tension spring a6 forces the leg support hanging plate a5 to be folded on the lower surface of the sliding adjusting plate a3, the front limiting sleeve a4 moves along the rear end of the sliding adjusting plate a3 to force the leg support hanging plate a5 to swing upwards clockwise, and the lower surface of the leg support hanging plate a5 is contacted with the upper surface of the sliding adjusting plate a 3.
In the optimization scheme, a tension spring column a51 is arranged on the lower surface of a leg support cantilever plate a5, one end of a tension spring a6 is connected to the tension spring column a51, the other end of the tension spring a6 is connected to a front limiting pin a31, and the front limiting pin a31 and the tension spring column a51 are positioned on a straight line.
As shown in figures 3 and 5-6,
next, the fixed slide a2 of the present embodiment is in a block shape, a connecting chute a21 is provided at the lower side of the fixed slide a2 along the front-rear direction of the fixed slide a2, the notch of the connecting chute a21 faces downward, the notch aperture of the connecting chute a21 is smaller than the groove bottom width of the connecting chute a21, the sliding adjusting plate a3 is inserted into the connecting chute a21, and the width of the sliding adjusting plate a3 is equal to the notch aperture of the connecting chute a 21.
Further, the regulating projections a22 extending in opposite directions are provided on both sides of the notch of the connecting chute a21, and the connecting chute a21 notch is formed between the regulating projections a 22.
The fixed slider a2 and the restricting projection a22 are integrally injection molded.
A plurality of protrusions a23 are respectively arranged on two sides of the bottom of the connecting chute a21 along the length direction of the connecting chute a21, two protrusions a24 which are in one-to-one correspondence with the protrusions a23 are arranged on one surface of each limiting protrusion a22 close to the bottom of the connecting chute a21, and the sliding adjusting plate a3 is in sliding contact with the protrusions a23 and the protrusions a 24.
The bottom of the connecting chute a21 is provided with a groove body a25 corresponding to the notch of the connecting chute a 21.
The inner wall of the front stop collar a4 is provided with a protrusion tri-a 41 provided along the longitudinal direction of the front stop collar a4, and the sliding adjustment plate a3 is in sliding contact with the protrusion tri-a 41.
The structure of the protrusion can be reinforced, and meanwhile, the contact area can be reduced, so that the moving smoothness is improved.
An arc-shaped limiting notch a42 for accommodating the front limiting pin a31 is formed in the middle of the front side of the front limiting sleeve a 4; the front side of the lower surface of the front limiting sleeve a4 is provided with a lower convex column a43, and the leg supporting hanging plate a5 is contacted with the lower end of the lower convex column a43 after being folded.
The lower surface of the leg support hanging plate a5 is provided with a U-shaped limiting plate a52, the opening of the U-shaped limiting plate a52 faces the front limiting sleeve a4, at least one guide plate a53 is connected to the inner middle part of the U-shaped limiting frame a, the width of the guide plate a53 is smaller than that of the U-shaped limiting plate a52, when the lower surface of the leg support hanging plate a5 is contacted with the upper surface of the sliding adjusting plate a3, the front end of the leg support hanging plate a5 stretches into the U-shaped limiting plate a52, and the upper surface of the leg support hanging plate a5 is contacted with the guide plate a 53.
When the leg support cantilever plate a5 swings anticlockwise upwards, the tension spring is lengthened, and when the front limit sleeve a4 is forced to slide towards the rear end of the sliding adjustment plate a3 along with the action of external force, the front end of the sliding adjustment plate a3 stretches into the U-shaped limit frame a under the guide of the guide plate a53, and the U-shaped limit frame a can prevent the leg support cantilever plate a5 from swinging and can limit.
In addition, a pulling hook is arranged on one side of the seat plate, one end of the pulling rope is connected to the pulling hook, the pulling rope passes through a clamping plate below the limiting device and is connected with the supporting leg assembly (6), namely, whether the supporting leg assembly (6) needs to be lifted or not is controlled through the change of the relative position of the pulling hook. The supporting leg component (6) is a lifting five-wheel supporting leg component, which is also in the prior art.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (7)
1. The linkage mechanism of the swivel chair backrest and the seat plate comprises a backrest (1) and the seat plate (a 1) and is characterized by further comprising a base (2) and a swinging frame (3) hinged with the rear side of the upper surface of the base (2), wherein the swinging frame (3) is obliquely and backwards arranged downwards, the lower side of the backrest (1) is connected with the lower side of the base (2) through a first hinge structure, the lower side of the backrest (1) is connected with the middle part of the swinging frame (3) through a second hinge structure, a tension spring (4) for forcing the upper side of the swinging frame (3) to have a downward movement trend so as to attach the backrest (1) to the back of a human body is arranged between the upper side of the swinging frame (3) and the base (2), the front side of the base (2) is hinged with the rear side of a front linkage frame (5), the seat plate (a 1) is arranged above the swinging frame (3) and the front linkage frame (5), and the upper side of the swinging frame (3) is hinged with the rear side of the seat plate (a 1);
the first hinge structure comprises two hinge arms I (11) which are parallel to each other, one end of the hinge arm I (11) is fixed on the lower side of the backrest (1), and the other end of the hinge arm I (11) is connected with the rear side of the base (2) through a pin shaft I (12); a fixed plate (13) is arranged at the lower side of the backrest (1), the first hinge arm (11) is fixed at two ends of the fixed plate (13), and the fixed plate (13) and the first hinge arm (11) are integrally formed; the hinge structure II comprises two hinge arms II (14) which are parallel to each other, a U-shaped plate (15) positioned between the two hinge arms I (11) is arranged on the fixed plate (13), two ends of the U-shaped plate (15) are respectively connected with one end of one hinge arm II (14) through a hinge shaft I, and the other end of the hinge arm II (14) is connected with the upper sides of two ends of the swinging frame (3) through the hinge shaft II.
2. The linkage mechanism of the swivel chair backrest and the seat according to claim 1, wherein the swinging frame (3) is in an inverted U-shaped structure, a limiting device (21) positioned in the swinging frame (3) is arranged on the upper surface of the base (2), and the limiting device (21) is used for preventing the upper side of the swinging frame (3) from excessively swinging downwards; a control mechanism for locking and swinging the base (2) and the swinging frame (3) and canceling the locking between the base (2) and the swinging frame (3) is arranged between the base (2) and the upper side of the swinging frame (3).
3. The linkage mechanism of a swivel chair backrest and a seat according to claim 2, characterized in that the control mechanism comprises a locking through hole (31) arranged on the left side and/or the right side of the swinging frame (3), a plurality of locking grooves (311) are arranged on the lower side hole wall of the locking through hole (31), the locking grooves (311) are distributed in a stepped mode, a control rotating rod (32) is arranged on the left side or the right side of the base (2) in a penetrating mode, a connecting arm (33) is connected to the inner end of the control rotating rod (32), and a locking rod (34) capable of being clamped in any locking groove (311) is fixed on the connecting arm (33).
4. A swivel chair backrest and seat linkage according to claim 3, wherein the inner end of the control rotating rod (32) is connected with two connecting arms (33) which are parallel to each other, the two connecting arms (33) are positioned on the outer sides of the left side or the right side of the swinging frame (3), the locking rod (34) penetrates through the locking through hole (31) and the two ends of the locking rod (34) are respectively penetrated at one end, far away from the control rotating rod (32), of the connecting arms (33), and a connecting arm locking structure is arranged between any connecting arm (33) and the base (2).
5. The linkage mechanism of a swivel chair backrest and a seat according to claim 4, wherein the connecting arm locking structure comprises a fixed block (22) arranged on the upper surface of the base (2) and a U-shaped block (23) sleeved on any connecting arm (33), a plurality of spherical recesses (231) which are arranged in a discrete manner are arranged in the middle of the outer surface of the U-shaped block (23), a transverse hole (221) is arranged on one surface of the fixed block (22) close to the spherical recesses (231), a locking pin (24) is inserted into the transverse hole (221), one end of the transverse hole (221) is aligned with one surface of the connecting arm (33) provided with the spherical recesses (231), one end of the locking pin (24) is provided with an arc convex surface (241) matched with the spherical recesses (231), a spring (25) is arranged between the other end of the locking pin (24) and the transverse hole (221), and the spring (25) forces one end of the locking pin (24) provided with the arc convex surface (241) to be inserted into the spherical recesses (231) when the locking pin (24) is aligned with any spherical recess (231).
6. The linkage mechanism of a swivel chair backrest and a seat according to claim 4, wherein a locating groove for arranging the inner end of a control rotating rod (32) is arranged on one side of the base (2), the inner end of the control rotating rod (32) is clamped in the locating groove and is rotationally connected with the locating groove, a Y-shaped sealing seat (26) for sealing the notch of the locating groove is arranged on the base (2), two connecting arms (33) are arranged in an opening of the Y-shaped sealing seat (26), and the Y-shaped sealing seat (26) is fixed on the base (2) through a pressing plate (27).
7. The linkage mechanism of a swivel chair backrest and a seat according to claim 2, wherein the upper side of the swinging frame (3) is connected with two supporting arms (30), and the two supporting arms (30) are parallel to each other and are connected with the rear side of the seat (a 1) through a hinge shaft III.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910177359.9A CN109864480B (en) | 2019-03-08 | 2019-03-08 | Swivel chair and linkage mechanism of backrest and seat plate thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910177359.9A CN109864480B (en) | 2019-03-08 | 2019-03-08 | Swivel chair and linkage mechanism of backrest and seat plate thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109864480A CN109864480A (en) | 2019-06-11 |
| CN109864480B true CN109864480B (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910177359.9A Active CN109864480B (en) | 2019-03-08 | 2019-03-08 | Swivel chair and linkage mechanism of backrest and seat plate thereof |
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| Country | Link |
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| CN (1) | CN109864480B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114009984A (en) * | 2021-12-17 | 2022-02-08 | 江西瞻宇教育装备集团有限公司 | Protective tablet chair capable of preventing spine injury |
| CN115530561B (en) * | 2022-10-31 | 2024-01-02 | 佛山市精一家具有限公司 | Self-adaptive seat |
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| CN107397369A (en) * | 2016-05-20 | 2017-11-28 | 永艺家具股份有限公司 | A kind of seat tool |
| CN108968466A (en) * | 2018-09-27 | 2018-12-11 | 浙江粤强家具科技有限公司 | Swivel chair |
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| KR200292591Y1 (en) * | 2002-07-29 | 2002-10-28 | 이세환 | an easy chair's back is linked with seat plate and it's locking structure |
| KR200306808Y1 (en) * | 2002-12-18 | 2003-03-11 | 장근대 | Chair |
| CN102846068A (en) * | 2012-09-18 | 2013-01-02 | 浙江永艺家具股份有限公司 | Rotary chair chassis |
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|---|---|
| CN109864480A (en) | 2019-06-11 |
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