CN114451714A

CN114451714A - Seat with adjustable seat

Info

Publication number: CN114451714A
Application number: CN202210017330.6A
Authority: CN
Inventors: 叶金; 阮正富
Original assignee: UE Furniture Co Ltd
Current assignee: UE Furniture Co Ltd
Priority date: 2022-01-07
Filing date: 2022-01-07
Publication date: 2022-05-10
Anticipated expiration: 2042-01-07
Also published as: CN114451714B

Abstract

The invention discloses a seat with an adjustable seat, which comprises: the chair comprises a chair seat and a base, wherein the chair seat can slide back and forth relative to the base; the base is of a frame type structure with a hollow middle part, and a U-shaped layout channel is arranged on the base; the layout channel comprises a rear bearing channel and side bearing channels respectively positioned at the left side and the right side; the locking adjusting mechanism comprises a main driving piece which is arranged on the rear bearing way and can move back and forth, locking rods which are arranged in the two side bearing ways in a mirror image mode and can rotate up and down, and a control mechanism which acts on the movement of the main driving piece; a motion conversion mechanism for converting the front and back movement of the main driving piece into the up and down rotation of the locking rod is arranged between the locking rod and the main driving piece; the front ends of the two locking rods are respectively provided with a locking pin, and the two sides of the chair seat are provided with clamping parts matched with the locking pins in a mirror image manner; the clamping part is provided with a plurality of locking grooves which are arranged at intervals along the front and back directions; the locking pin is clamped or withdrawn in the locking groove in response to the movement of the locking rod so as to enable the seat and the base to be locked or unlocked in a sliding mode.

Description

Seat with adjustable seat

Technical Field

The invention relates to the field of chairs, in particular to a seat with an adjustable seat.

Background

The office chair is used as an important office appliance in daily office life, and the comfort degree of the chair is directly related to the working and life quality of people. At present, a plurality of office chairs in the market adopt a universal chassis, the matching relation of the sizes of a backrest and a seat surface is not studied, the backrest, particularly a waist rest of a chair is separated from the waist of a human body in the process of inclining by a user, and the backrest and the waist rest of the chair directly form a suspension gap, so that the chair loses the support for the waist of the human body in the inclining state, which is commonly called as 'waist running', and the spine of the human body cannot be effectively supported, so that a plurality of health problems of long sitting are caused; meanwhile, due to the adoption of the universal chassis, the man-machine size matching relationship between the backrest and the seat surface is not studied, the hip and the seat surface are relatively fixed in the tilting process of a user, and the backrest of the seat rubs upwards relative to the back of a human body, so that the discomfort of rubbing the back and pulling clothes is caused, and the inelegant impression is also caused. In addition, in the process of tilting, the user leans backwards along with the backrest, so that the gravity center of the human body is shifted backwards to deviate from the bearing gravity center of the seat, the user is easy to tip over, and potential danger exists. Aiming at the defects of office chairs in the current market, a seat-back linkage chair appears in the market, wherein a chair seat can slide back and forth relative to a base, and a user rotates a chair back backwards and synchronously slides forwards in the process of leaning and leaning; the seat can always play a role in supporting the waist of a human body, and the waist running condition is effectively avoided; the buttocks and the cushion of the user can move synchronously, the upward friction of the backrest to the back of the human body is effectively avoided, and the phenomenon of rubbing the back and pulling clothes is effectively avoided. However, in the process of backward leaning, the backrest of the linked chair can be supported only when the leaning angle reaches the maximum, and the user can lean stably at the moment. However, due to different body types and rest habits of people, only one leaning angle can obviously not meet the requirements of most users.

The Chinese patent of CN201510136421.1 discloses a limit adjusting mechanism of a seat back linkage chair seat, the limit adjusting mechanism is arranged in a base and comprises a limit adjusting handle, a limit base, a control line and a limit stepped slider, an inserting groove for inserting the limit stepped slider is arranged in the limit base, the limit stepped slider comprises a step part with a plurality of steps and an inserting part inserted in the inserting groove, and an elastic part is arranged between the limit stepped slider and the limit base; one end of the control wire is connected with the limiting adjusting handle, and the other end of the control wire penetrates through the limiting base and is connected with the inserting part of the limiting stepped sliding block. Set up spacing adjustment mechanism to adjust the length that spacing ladder slider stretches out through adjusting spacing adjustment handle, make the seat support inconsistent with the different step departments of spacing ladder slider, thereby the distance that the seat support can be marchd, and then adjust the angle range of inclining of back. Although the adjusting mechanism can adjust the positions of the backrest and the seat, firstly, only one side of the adjusting mechanism is provided with a limiting step slide block, so that the adjusting mechanism is only locked on one side during locking, and the structure is unstable. Moreover, the adjusting mechanism is arranged in the base in the front and back directions, and the inner space of the base is completely occupied; only for bases with sufficient space.

For some bases with a small internal space: the utility model discloses a "chair" as CN201921749559.9, which comprises a seat supporting piece, wherein the seat supporting piece is provided with a lower part which is arranged obliquely relative to the horizontal plane, a drawing type footrest adjusting mechanism is arranged on the seat supporting piece, the drawing type footrest adjusting mechanism comprises a drawing rod which slides back and forth along the seat supporting piece, and a footrest is rotationally arranged at the front end of the drawing rod; in a storage state, the footrest is obliquely turned backwards and downwards relative to the drawing rod and stays at a first preset position, the drawing rod returns, and the footrest is backwards close to and depends on the lower part of the seat support piece; in the open state, the footrest rotates from bottom to top and forwards to a second preset position for supporting the feet of the human body; when the footrest is folded under the seat supporting piece, the footrest and the seat supporting piece are connected into a whole in appearance, and the lines are harmonious and have no obtrusive feeling. The base of the chair is arranged into a middle hollow structure for avoiding the storage of the footrest. The inner space of the base is narrow, and the limiting adjusting mechanism is obviously inconvenient to arrange.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the adjustable seat with skillful design and reasonable layout; the middle of the base of the seat is hollow, so that the internal space of the base is narrow; therefore, the U-shaped layout channel is arranged according to the structural shape of the base, and the locking and adjusting mechanism is reasonably arranged in the rear bearing way and the side bearing ways at the two sides; the locking rod is driven to rotate up and down by the front and back movement of the main driving piece, the internal space of the base is fully utilized, the locking function of the chair seat is effectively realized, and the locking mechanism is suitable for the base with small space. And all set up the locking lever in two side bearing ways, realize bilateral locking, the structure is more stable after the locking.

The technical scheme of the invention is realized as follows:

a seat adjustable seating apparatus, comprising: the chair comprises a chair seat and a base, wherein the chair seat is arranged on the base in a sliding manner and can slide back and forth relative to the base; the base is of a frame structure with a hollow middle part, and a U-shaped layout channel with a forward opening is arranged on the base; the layout channel comprises a rear bearing channel positioned at the rear end and side bearing channels respectively positioned at the left side and the right side; the locking adjusting mechanism is arranged in the layout channel of the base and acts on the chair seat; the locking adjusting structure comprises a main driving piece which is arranged on the rear bearing way and can move back and forth, locking rods which are arranged in the two side bearing ways in a mirror image mode and can rotate up and down, and a control mechanism for controlling the movement of the main driving piece; a motion conversion mechanism is arranged between each locking rod and the main driving piece, and the motion conversion mechanism is configured to convert the front-back movement of the main driving piece into the up-down rotation of the locking rod; the front ends of the two locking rods are respectively provided with a locking pin, and the two sides of the chair seat are provided with clamping parts matched with the locking pins in a mirror image manner; the clamping part is provided with a plurality of locking grooves with openings facing downwards and arranged at intervals along the front and back directions; the locking pin is clamped or withdrawn in the locking groove in response to the up-and-down rotation action of the locking lever so as to enable the seat and the base to be locked or unlocked in a sliding mode.

Preferably, the main driving part is U-shaped, the main driving part comprises a transverse rod and side rods respectively positioned at two sides of the transverse rod, and a power output part linked with the locking rod is formed at the position, far away from the transverse rod, of each side rod; the control mechanism is configured to act on the transverse rod to move back and forth; the motion conversion mechanism is arranged between the side rod and the locking rod. The main driving piece is set to be of a bilaterally symmetrical U-shaped structure, the control mechanism controls the transverse rod to move so as to drive the side rods on the two sides to move synchronously, and the side rods on the two sides are guaranteed to output power synchronously to drive the locking rods to move, so that the locking rods on the two sides keep moving synchronously.

Preferably, a seat support rod inserting part is arranged at the center of the rear bearing way, and the main driving part is in a U-shaped structure to avoid the seat support rod inserting part. The main driving piece is of a U-shaped structure, and the other purpose is to avoid a seat support rod inserting part at the center of the rear bearing way and not interfere the installation of the seat support rod; the main driving part can not occupy too much area, and narrow space in the rear bearing channel can be fully utilized.

Preferably, the control mechanism comprises a control wrench rotatably arranged on one side of the base, a transverse pulling piece arranged between the control wrench and the cross bar and a first rotating rod; the transverse pulling piece is arranged in the rear bearing way along the width direction of the base, and one end of the transverse pulling piece is hinged with the control wrench; controlling the spanner to rotate to drive the transverse pulling piece to move outwards along the width direction of the base; the first rotating rod is of an L-shaped structure and can rotate around the base; one end of the first rotating rod is hinged with the transverse pulling piece, and the other end of the first rotating rod is hinged at the middle position of the transverse rod; the transverse pulling piece moves towards the outer side of the base and can drive the first rotating rod to rotate and drive the main driving piece to move forwards. Thereby, the transverse pulling piece can be driven to move along the width direction of the base by controlling the rotation action of the wrench; then, the transverse rod is further driven to move along the front-back direction by utilizing the rotation action of the first rotating rod; the spanner is controlled to rotate so as to drive the main driving piece to move back and forth; design benefit, and the horizontal piece that draws arranges in the back bearer way along the width direction of base, occupation space is little.

Preferably, the rear bearing way comprises a wide part in the middle and narrow parts positioned at the left side and the right side of the wide part, a transition part is formed between the wide part and the narrow parts, the main driving part moves back and forth in the wide part, the transverse pulling part is positioned in the narrow parts and is positioned at a position close to the edges of the narrow parts, the first rotating rod is horizontally arranged, the first rotating rod is divided into a first branch, a second branch and an L-shaped corner formed at the joint of the first branch and the second branch, and the L-shaped corner of the first rotating rod is positioned at the transition part and is hinged with the base; the end part of the first branch is hinged with the transverse pulling piece, and the end part of the second branch is hinged with the middle position of the transverse rod. The upper and lower rotation of the wrench is controlled to be converted into the movement of the transverse pulling piece along the width direction of the chair seat and then converted into the rotation of the first rotating rod in the horizontal direction, so as to drive the main driving piece to move back and forth along the depth direction of the chair seat; the rear bearing channel is divided into a wide part and a narrow part, and the wide part ensures that the movement stroke of the main driving piece is preset by the movable space of the main driving piece; the first rotating rod is arranged at the transition part and the adjacent area, and the transverse pulling piece only moves back and forth at the position close to the edge of the narrow part, so that the occupied space is reduced as much as possible.

Preferably, the transverse pulling piece comprises a first connecting rod and a second connecting rod which are in clamping fit; the first connecting rod and the second connecting rod are both plate-shaped pieces, the first connecting rod is vertically arranged and hinged with the control wrench, and the second connecting rod is transversely arranged and hinged with the first rotating rod. The first connecting rod is vertically arranged to be conveniently and rotatably connected to one side of the control wrench, and the second connecting rod is horizontally arranged to be conveniently hinged with the first rotating rod, so that the connection process is more convenient; the two are connected in a clamping manner, so that the connection is convenient; moreover, the second connecting rod is transversely arranged so that the hinged part of the second connecting rod and the first rotating rod is vertically attached, and the occupied space in the longitudinal direction is reduced; the vertical rotation of the control wrench is converted into the horizontal movement of the second connecting rod through the first connecting rod, and finally the first rotating rod is enabled to horizontally rotate.

Preferably, the motion conversion mechanism includes a second rotating lever and a third rotating lever connected between the side lever and the locking lever; the second rotating rod is rotatably arranged in the rear bearing channel along the width direction of the base, one end of the second rotating rod is hinged with the side rod, and the other end of the second rotating rod is connected with the third rotating rod; the third rotating rod is an L-shaped rod which is vertically arranged, and the third rotating rod is rotatably arranged behind the locking rod; the side lever back-and-forth movement can drive the second dwang to rotate in the horizontal direction in order to pull the third dwang and rotate from top to bottom, and the third dwang is configured to rotate from top to bottom in order to act on the locking lever and rotate from top to bottom. The back-and-forth movement of the side rods is effectively converted into the up-and-down movement of the locking rods through the movement matching of the second rotating rod and the third rotating rod; the second rotating rod is horizontally and rotatably arranged in the rear bearing channel, the horizontal rotation of the second rotating rod and the movement of the transverse pulling piece are not interfered with each other, and the space in the rear bearing channel is reasonably utilized; the third rotating rod serves as a power transfer piece in the motion direction, and the second rotating rod pulls the third rotating rod back and forth to rotate up and down so as to drive the locking rod to rotate up and down; the movement between the connecting rods is orderly layer by layer, and the force transmission effect is good; so that the locking rod moves smoothly.

Preferably, a connecting spring is arranged between the second rotating rod and the third rotating rod, and two ends of the connecting spring are respectively connected to the second rotating rod and the third rotating rod; the side lever moves forward to drive the second rotating rod to horizontally rotate to pull the connecting spring backwards and drive the third rotating rod to rotate up and down. The connecting spring realizes that the second rotating rod is in soft connection with the third rotating rod, because the distance between the second rotating rod and the third rotating rod is changed in the actual movement process, if a hard connecting rod is adopted, the length of the connecting rod needs to be correspondingly changed in the movement process, and the design difficulty is high; the connecting spring can effectively solve the problem; and the connecting spring also enables the adjusting process to have good damping feeling and provides reset elastic force.

Preferably, a first rotating support seat and a second rotating support seat which are spaced from each other in the front and back directions are arranged in the side bearing way, the rear part of the locking rod is rotatably connected to the first rotating support seat, and the third rotating rod is rotatably connected to the second rotating support seat; and a horizontally extending abutting column is arranged on the third rotating rod and abuts against the upper end of the locking rod. When the third rotating rod rotates, the pressing column acts on the locking rod downwards to enable the rear end of the locking rod to rotate downwards, and therefore the front end of the locking rod tilts.

Preferably, in the unlocked state, the second rotating rod horizontally rotates to pull the third rotating rod backwards; the third rotating rod rotates up and down to enable the abutting-against column to act on the locking rod downwards to rotate, and the front end of the locking rod is tilted.

Preferably, a reset torsion spring is arranged between the locking rod and the first rotary supporting seat, one torsion arm of the reset torsion spring is arranged on the base, and the other torsion arm of the reset torsion spring is arranged on the locking rod. Thus, when the locking rod rotates, the reset torsion spring can generate elastic deformation and provide the trend of resetting the locking rod, so that the locking pin can automatically reset.

Preferably, the front end of the side bearing way is provided with a fixed seat, the fixed seat is provided with a vertical guide groove, and the locking pin is arranged in the guide groove in a penetrating manner and can move up and down along the guide groove. The locking pin can move up and down stably and smoothly.

Preferably, the chair seat is of a square frame structure, and the clamping parts are respectively arranged on the inner sides of the two sides of the chair seat; the clamping portion is arranged at the front end of the seat, and the locking pin is located below the clamping portion.

Preferably, a limiting guide mechanism is further arranged between the cross rod and the rear bearing way, and the limiting guide mechanism comprises a limiting guide groove arranged in the rear bearing way along the front-rear direction and a limiting guide pin correspondingly arranged at the center of the cross rod. The main driving piece can stably move along the front and back direction of the base, and the moving range of the column driving piece is limited.

Preferably, the position-limiting guide pin is further provided as a rotation connecting shaft of the first rotation lever and the cross bar. The limiting guide pin can serve as a connecting pin and can also play a role in guiding and limiting; the center of the cross bar is a power input part and a sliding guide part; the design is ingenious, and the connecting structure is saved.

The design starting point, the idea and the beneficial effects of the invention adopting the technical scheme are as follows:

1, the seat adjustable seat has the advantages that the middle position of the base is hollow, so that the inner space of the base is narrow; therefore, the U-shaped layout channel A is arranged on the base, the main driving piece moving back and forth is arranged on the rear bearing way, and the long strip-shaped locking rods are respectively arranged on the side bearing ways on the two sides; the main driving piece can be controlled to move back and forth by rotating the control wrench through the control mechanism, the linkage between the main driving piece and the locking rod is realized through the motion conversion mechanism, and the back and forth movement of the main driving piece is converted into the up and down rotation of the locking rod; then the locking rod can be driven to rotate by controlling the spanner to rotate, so that the locking pin is clamped in the locking groove, and the locking of the seat and the base can be conveniently realized. The main driving piece is back and forth in the back bearing way, and the locking rod rotates up and down in the side bearing way, so that the structure layout is reasonable and ingenious, the self structure space of the base is fully utilized, and the chassis with small space is suitable for the chassis with small space.

And 2, the main driving piece is of a bilaterally symmetrical U-shaped structure, so that the control mechanism controls the transverse rod to move to drive the side rods on the two sides to synchronously move, the side rods on the two sides synchronously output power to drive the locking rods to move, and the locking rods on the two sides keep synchronously moving. In addition, the U-shaped structure can avoid the seat support rod insertion part at the center of the rear bearing way and does not interfere with the installation of the seat support rod; the main driving part can not occupy too much area, and narrow space in the rear bearing channel can be fully utilized.

And 3, the side bearing channels on the two sides are respectively provided with a locking rod, so that when the chair is locked, the two locking rods are simultaneously locked with the two sides of the chair seat to realize bilateral locking, and the structure is more stable after the chair is locked.

4, a connecting spring is arranged between the second connecting rod and the third connecting rod, and the connecting spring can realize 'soft connection' between the second rotating rod and the third rotating rod, because the distance between the second rotating rod and the third rotating rod is changed in the actual movement process, if a hard connecting rod is adopted, the length of the connecting rod needs to be correspondingly changed in the movement process, and the connecting rod has design difficulty; the connecting spring can effectively solve the problem; and the connecting spring also enables the adjusting process to have good damping feeling and provides reset elastic force. A reset torsion spring is also arranged between the locking rod and the base, so that the damping adjusting device has good damping adjusting feeling when the control wrench is acted; and the connecting spring and the reset torsion spring can provide elasticity to enable the locking rod to automatically rotate and reset, so that the locking pin can automatically reset to withdraw from the locking groove.

Drawings

FIG. 1 is a side view of a seat and base in an embodiment of the present invention;

FIG. 2 is a side view of the embodiment of the present invention showing the seat slid relative to the base;

FIG. 3 is a schematic perspective view of the locking pin engaging with the locking groove in an embodiment of the present invention;

FIG. 4 is a schematic perspective view of the connection between the seat and the base according to the embodiment of the present invention;

FIG. 5 is a schematic perspective view of a layout channel in a base according to an embodiment of the present invention;

FIG. 6 is a schematic perspective view of a locking adjustment mechanism in an embodiment of the present invention;

FIG. 7 is a schematic perspective view of an alternative locking adjustment mechanism of an embodiment of the present invention;

FIG. 8 is a partial structural view of one side of a base plate according to an embodiment of the present invention;

FIG. 9 is a schematic perspective view of a locking adjustment mechanism in an embodiment of the present invention;

FIG. 10 is a schematic perspective view of a control mechanism according to an embodiment of the present invention;

fig. 11 is a schematic perspective view of a motion conversion mechanism according to an embodiment of the present invention.

The figures are numbered: a seat 1; a base 2; laying out a channel A; a seat support rod inserting part a; a rear carrier track 3; a side load bearing lane 4; the wide portion 3 a; a narrow portion 3 b; a transition portion 3 c; a lock adjusting mechanism 5; a main drive member 6; a cross bar 6 a; side bars 6 b; a locking lever 7; controlling the wrench 8; a locking pin 9; a clip portion 10; a locking groove 11; a tie rod 12; a first link 13 a; a second link 13 b; a first rotating lever 14; branch one 13 a; branch two 13 b; an L-shaped corner 13 c; a limiting guide groove 15; a limit guide pin 16; the second rotating lever 17; a third rotating shaft 18; a connecting spring 19; a pressing column 20; a return torsion spring 21; a fixed seat 22; a guide groove 23; a first rotary support 24; a second rotary support 25.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more than one unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present embodiment relates to reference orientations of components such as front, rear, etc., which are described in a normal use state in which a user is seated on the seat.

The specific embodiment of the invention is as follows:

as shown in fig. 1 to 11, the present invention provides a seat adjustable seating furniture, which comprises a seat 1 and a base 2, wherein the seat 1 is slidably disposed on the base 2 and can slide back and forth relative to the base 2; the base 2 is of a frame structure with a hollow middle, a U-shaped layout channel A with a forward opening is arranged on the base 2, and the layout channel A comprises a rear bearing channel 3 located at the rear end and side bearing channels 4 located on the left side and the right side respectively. And a locking adjusting mechanism 5 acting on the chair seat 1 is arranged in the layout channel A, and the locking adjusting mechanism 5 comprises a main driving part 6 which is arranged on the rear bearing way 3 and can move back and forth, elongated locking rods 7 which are arranged in the two side bearing ways 4 in a mirror image manner, and a control mechanism for driving the main driving part 6 to move. Wherein a motion conversion mechanism is provided between each locking lever 7 and the main driver 6, the motion conversion mechanism being configured to convert the forward and backward movement of the main driver 6 into the upward and downward rotation of the locking lever 7; therefore, the action control mechanism can drive the main driving piece 6 to move back and forth relative to the base 2, and the main driving piece 6 can drive the locking rod 7 to rotate in the vertical direction relative to the base 2 by moving back and forth. A locking pin 9 is arranged at the front end of the locking rod 7, and correspondingly, clamping parts 10 matched with the locking pin 9 are arranged on the two sides of the chair seat 1 in a mirror image manner; the clamping part 10 is provided with a plurality of locking grooves 11 which are arranged at intervals along the front and back direction and have downward openings; the locking pin 9 moves upwards and is clamped into any one of the locking grooves 11 so as to relatively fix the seat 1 and the base 2; therefore, the sliding locking and unlocking of the seat 1 can be realized by acting on the control mechanism, so that the seat 1 stays at any position. The middle of the base 2 is hollow, so that the internal space of the base 2 is narrow; therefore, a U-shaped layout channel A is arranged according to the shape of the base 2, and the locking adjusting mechanism 5 is reasonably arranged in the rear bearing channel 3 and the side bearing channels 4 at the two sides; the layout is reasonable and ingenious, and the locking function of the chair seat 1 is effectively realized. And all set up locking lever 7 in two side carrier ways 4, realize bilateral locking, the structure is more stable after the locking.

As shown in fig. 3-11, the main driving member 6 is U-shaped, and the main driving member 6 includes a transverse bar 6a and side bars 6b respectively located at two sides of the transverse bar 6 a; the control mechanism is configured to act on the crossbar to move forward and backward, and the motion conversion mechanism is provided between a side lever 6b and a locking lever 7, the side lever 6b forming a power output portion, which is linked with the locking lever 7, away from a crossbar 6a end. Through setting up main drive piece 6 to bilateral symmetry 'U' type structure, control mechanism control horizontal pole 6a removes in order to drive the side lever 6b synchronous motion of both sides, guarantees the side lever 6b synchronous output power of both sides and in order to order about locking lever 7 motion to make the locking lever 7 of both sides keep synchronous motion, lock more stably. A seat support rod insertion part a is arranged in the middle of the rear bearing channel 3, and the main driving piece 6 is arranged in a U-shaped structure and can avoid the seat support rod insertion part a without interfering the installation of seat support rods; therefore, the main driving piece 6 does not occupy too much area, and the narrow space in the rear bearing channel 3 can be fully utilized; and the structure is a U-shaped structure, so that the material can be saved.

As shown in fig. 6-10, the control mechanism includes a control wrench 8 rotatably disposed at one side of the base 2, a cross-pull member 12 disposed between the control wrench 8 and the cross bar 6a, and a first rotating rod 14, specifically: the transverse pulling piece 12 is arranged in the rear bearing way 3 along the width direction of the base, one end of the transverse pulling piece 12 is hinged with the control wrench 8, and the control wrench 8 can drive the transverse pulling piece 12 to move outwards along the width direction of the base 2 by rotating; first rotation pole 14 be "L" type structure, first rotation pole 14 rotates and connects on base 2, and this first rotation pole 14 one end and horizontal pull end portion hinge, the other end of first rotation pole 14 articulates the intermediate position department at the horizontal pole 6a of main drive piece 6. Through the control mechanism, the transverse pulling piece 12 can be driven to move along the width direction of the base 2 by controlling the up-and-down rotation action of the wrench 8; then, the first rotating rod 14 rotates to further drive the cross rod 6a to move along the front-back direction; the spanner 8 is controlled to rotate to drive the main driving piece 6 to move back and forth; the design is ingenious, and the transverse pulling piece 12 is arranged in the rear bearing way along the width direction of the base 2, so that the occupied space is small. Further, the following steps are carried out: the rear load-bearing channel 3 comprises a wide part 3a in the middle and narrow parts 3b at the left and right sides of the wide part 3a, and a transition part 3c is formed between the wide part 3a and the narrow parts 3 b; the main driving piece 6 moves back and forth in the wide part 3a, and the wide part 3a ensures the moving space of the main driving piece 6 to ensure that the moving stroke of the main driving piece 6 meets the preset requirement; the transverse pulling piece 12 is positioned in the narrow part 3b and at a position close to the edge of the narrow part 3b, and the transverse pulling piece 12 only moves back and forth at a position close to the edge of the narrow part 3b, so that the occupied space can be reduced as much as possible; the first rotating rod 14 is horizontally arranged, the first rotating rod is divided into a first branch 14a, a second branch 14b and an L-shaped corner 14c formed at the joint of the first branch and the second branch, and the L-shaped corner 14c of the first rotating rod 14 is positioned at the transition part 3c and is hinged with the base 2; the end part of the first branch 14a is hinged with the transverse pulling piece 12, the end part of the second branch 14b is hinged with the middle position of the cross bar 3a, and the first rotating rod 14 is arranged at the transition part 3c, so that the first rotating rod is also close to the edge of the rear bearing way 3, and the occupied space is further reduced; so that the control mechanism can stably drive the main driving element 6 to move in the rear bearing way 3.

Furthermore, the cross-pull member 12 comprises a first connecting rod 13a and a second connecting rod 13b which are arranged right and left; wherein, one end of the first connecting rod 13a is hinged with the control wrench 8, and the other end of the first connecting rod 13a is connected with the second connecting rod 13 b; the other end of the second link 13b is hinged to the first rotation lever 14. The first connecting rod 13a and the second connecting rod 13b are both plate-shaped pieces, and the first connecting rod 13a is vertically arranged so as to be conveniently connected to one side of the control wrench 8 in a rotating mode; the second link 13b is horizontally disposed to be conveniently hinged with the first rotating lever 14; thereby making the connection process more convenient. In addition, the first connecting rod 13a and the second connecting rod 13b are in clamping fit, so that the structure is simple and the connection is more convenient; moreover, the second connecting rod 13b is transversely arranged to enable the hinged position of the second connecting rod 13b and the first rotating rod 14 to be vertically attached, so that the occupied space in the longitudinal direction is reduced; the first connecting rod 13a is vertically arranged, so that the transverse occupied space of the narrow part 3b can be reduced; thereby converting the vertical rotation of the control wrench 8 into the horizontal movement of the second link 13b through the first link 13a, and finally enabling the first rotation lever 14 to horizontally rotate.

In addition, a limiting guide mechanism is further arranged between the cross rod 6a and the rear bearing way 3, and comprises a limiting guide groove 15 which is arranged on the rear bearing way 3 and is arranged along the front-back direction, and a limiting guide pin 16 which is correspondingly arranged at the center of the cross rod 6a and has a lower end positioned in the limiting guide groove 15. Therefore, the main driving member 6 can stably move in the front-rear direction of the base 2, and the moving range of the column driving member 6 is limited. And the limit guide pin 16 is also configured as a rotating connecting shaft between the first rotating rod 14 and the cross rod 6a, and can also play a role in connection, thereby achieving two purposes at a time. Then, the center of the cross rod 6a is used as a power input part and a sliding guide part; the design is ingenious, and the connecting structure is saved.

As shown in fig. 6-11, the two side bearing ways 4 are provided with the locking levers 7, and a motion conversion mechanism for realizing the linkage between each locking lever 7 and the side lever 6b on the corresponding side of the main driving element 6 is provided between the locking lever 7 and the side lever 6b, so that the main driving element 6 can move back and forth and simultaneously drive the two locking levers 7 to move synchronously. Specifically, the method comprises the following steps: the motion conversion mechanism comprises a second rotating rod 17 and a third rotating rod 18 which are connected between the side rod 6b and the locking rod 7; the second rotating rod 17 is arranged in the rear bearing way 3 along the width direction of the base 2, and the middle position of the second rotating rod 17 is rotatably connected with the base 2, so that the second rotating rod 17 can rotate in the horizontal direction; and second dwang 17 and violently draw spare 12 fore-and-aft interval, then set up violently drawing spare 12 to the marginal position activity that is close to narrow part 3b, the purpose is in order to reserve the activity space of back bearer way 3 for second dwang 17 has the space to rotate, makes second dwang 17 and violently draw and do not interfere each other between the spare 12. One end of the second rotating rod 17 is hinged on the side rod 6b, and the other end of the second rotating rod 17 is connected with the third rotating rod 18; specifically, the method comprises the following steps: the third rotating rod 18 is arranged at the rear end of the locking rod 7, the third rotating rod 18 is also an L-shaped rod, a first rotating support seat 24 and a second rotating support seat 25 which are spaced from each other in the front and back directions are arranged in the side bearing way 4, the rear part of the locking rod 7 is rotatably connected to the first rotating support seat 24, the third rotating rod 18 is vertically arranged, and the intersection point of the third rotating rod 18 and the second rotating support seat 25 are rotatably connected; the rear end of the third rotating lever 18 is connected to the second rotating lever 17, and the front end of the third rotating lever 18 is connected to the locking lever 7. Further, the following steps are carried out: the second rotating rod 17 and the third rotating rod 18 are connected together through a connecting spring 19, and when the main driving part 6 moves forwards, the second connecting rod 17 rotates to pull the third rotating rod 18 backwards; the connecting spring 19 makes the control wrench 8 have good damping feeling when acting; the connection spring 19 can realize the soft connection between the second rotating rod 17 and the third rotating rod 18, because the distance between the second rotating rod 17 and the third rotating rod 18 is changed in the actual movement process, if a hard connecting rod is adopted, the length of the connecting rod needs to be correspondingly changed in the movement process, and the design difficulty is high; the connecting spring 19 can effectively solve the problem; and the connecting spring 19 also gives a good damping feeling during adjustment and provides a return spring force. Then, the back and forth movement of the side lever 6b is effectively converted into the up and down movement of the locking lever 7 through the movement matching of the second rotating lever 17 and the third rotating lever 18; the second rotating rod 17 is horizontally and rotatably arranged in the rear bearing channel 3, so that the space in the rear bearing channel 3 is reasonably utilized; the third rotating rod 18 serves as a power transfer piece in the moving direction, and the second rotating rod 17 pulls the third rotating rod 18 to rotate up and down in a front-back mode so as to drive the locking rod 7 to rotate up and down; the movement between the connecting rods is orderly layer by layer, and the force transmission effect is good; so that the locking rod 7 moves smoothly.

As shown in fig. 11, a horizontally extending pressing column 20 is disposed at a connection end of the third rotating rod 18 and the locking rod 7, and the pressing column 20 presses against an upper end of the locking rod 7, so that when the second rotating rod 17 pulls the third rotating rod 18 backward to rotate, the pressing column 20 acts downward on the locking rod 7 to rotate the rear end of the locking rod 7 downward, so that the front end of the locking rod 7 is tilted. The locking rod 7 is a vertically arranged plate-shaped member, a reset torsion spring 21 is further arranged between the locking rod 7 and the first rotary supporting seat 24, one torsion arm of the reset torsion spring 21 is arranged on the base 2, the other torsion arm of the reset torsion spring 21 is arranged on the locking rod 7, and the reset torsion spring 21 enables the locking rod 7 to still have a reset trend after rotating, so that the locking rod 7 can reset automatically. Then, when the main driver 6 is moved forward by the motion conversion mechanism, the front end of the locking lever 7 is tilted upward by the second rotating lever 17 and the third rotating lever 18 to move the locking pin 9 upward; and under the action of the connecting spring 19 and the reset torsion spring 21, the control wrench 8 is rotated to have good damping feeling, and when the control wrench 8 is loosened, the locking rod 7 can reset by itself, so that the locking pin 9 is reset and moved downwards.

As shown in fig. 3-8, a fixing seat 22 is further disposed at the front end of the side load-bearing channel 4, a vertical guide groove 23 is disposed on the fixing seat 22, and the locking pin 9 is inserted into the guide groove 23 and moves up and down along the guide groove 23. And as shown in fig. 3, the seat support 1 is a frame structure shaped like a Chinese character kou, the clamping portions 10 are respectively arranged on the inner sides of the two sides of the seat support 1, the locking pins 9 are just positioned below the clamping portions 10, and can move upwards to be clamped into the locking grooves 11. Then, the use and adjustment mode of the seat is very simple, and a user can control the seat 1 to slide and adjust back and forth relative to the base 2 when sitting on the seat; when the seat 1 needs to be locked at a certain position, the seat 1 and the base 2 can be relatively fixed only by acting the control wrench 8 to rotate to enable the locking pin 9 to be upwards clamped into the locking groove 11; if the unlocking is needed again, only the control wrench 8 is required to rotate and reset; the operation is convenient and fast.

Then, the seat adjustable seating device of the invention has the advantages that although the middle position of the base 2 is hollow, the inner space of the base 2 is narrow; however, a U-shaped layout channel A is arranged on the base 2, a main driving piece 6 which moves back and forth is arranged on the rear bearing way 3, and long strip-shaped locking rods 6 are respectively arranged on the side bearing ways 4 at the two sides; and the main driving piece 6 is driven through the control mechanism and the motion conversion mechanism, the locking rod 7 keeps moving synchronously with the main driving piece 6, then the locking rod 6 can be driven to rotate by the rotation of the action control wrench 8, and the locking pin 9 is clamped into the locking groove 11, so that the locking of the seat 1 and the base 2 is realized. The structure layout is reasonable and ingenious, and the self structure space of the base 2 is fully utilized. And the side bearing ways 4 on both sides are provided with the locking rods 7, so that when the chair is locked, the two locking rods 7 are simultaneously locked with both sides of the chair seat 1, double-side locking is realized, and the structure is more stable after the locking.

The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.

Claims

1. A seat adjustable seating apparatus, comprising:

the chair comprises a chair seat and a base, wherein the chair seat is arranged on the base in a sliding manner and can slide back and forth relative to the base; the base is of a frame structure with a hollow middle part, and a U-shaped layout channel with a forward opening is arranged on the base; the layout channel comprises a rear bearing channel positioned at the rear end and side bearing channels respectively positioned at the left side and the right side;

the locking adjusting mechanism is arranged in the layout channel of the base and acts on the chair seat; the locking adjusting structure comprises a main driving piece which is arranged on the rear bearing way and can move back and forth, locking rods which are arranged in the two side bearing ways in a mirror image mode and can rotate up and down, and a control mechanism for controlling the movement of the main driving piece; a motion conversion mechanism is arranged between each locking rod and the main driving piece, and the motion conversion mechanism is configured to convert the front-back movement of the main driving piece into the up-down rotation of the locking rod;

the front ends of the two locking rods are respectively provided with a locking pin, and the two sides of the chair seat are provided with clamping parts matched with the locking pins in a mirror image manner; the clamping part is provided with a plurality of locking grooves with openings facing downwards and arranged at intervals along the front and back directions; the locking pin is clamped or withdrawn in the locking groove in response to the up-and-down rotation action of the locking lever so as to enable the seat and the base to be locked or unlocked in a sliding mode.

2. The seat adjustable seating apparatus of claim 1, wherein: the main driving part is U-shaped and comprises a transverse rod and side rods respectively positioned on two sides of the transverse rod, and the side rods are far away from the transverse rod to form a power output part linked with the locking rod; the control mechanism is configured to act on the transverse rod to move back and forth; the motion conversion mechanism is arranged between the side rod and the locking rod.

3. The seat adjustable seating apparatus of claim 2, wherein: the central point department at back carrier way has seat support bracing piece grafting portion, and main drive spare is through "U" type structure in order to dodge this seat support bracing piece grafting portion.

4. The seat adjustable seating apparatus of claim 2, wherein: the control mechanism comprises a control wrench rotatably arranged on one side of the base, a transverse pulling piece arranged between the control wrench and the cross rod and a first rotating rod; the transverse pulling piece is arranged in the rear bearing way along the width direction of the base, and one end of the transverse pulling piece is hinged with the control wrench; controlling the spanner to rotate to drive the transverse pulling piece to move outwards along the width direction of the base; the first rotating rod is of an L-shaped structure and can rotate around the base; one end of the first rotating rod is hinged with the transverse pulling piece, and the other end of the first rotating rod is hinged at the middle position of the transverse rod; the transverse pulling piece moves towards the outer side of the base and can drive the first rotating rod to rotate and drive the main driving piece to move forwards.

5. The seat adjustable seating apparatus of claim 4, wherein: the rear bearing way comprises a wide part in the middle and narrow parts positioned on the left side and the right side of the wide part, a transition part is formed between the wide part and the narrow parts, the main driving part moves back and forth in the wide part, the transverse pulling part is positioned in the narrow parts and is positioned at a position close to the edges of the narrow parts, the first rotating rod is horizontally arranged and is divided into a first branch, a second branch and an L-shaped corner formed at the joint of the first branch and the second branch, and the L-shaped corner of the first rotating rod is positioned at the transition part and is hinged with the base; the end part of the first branch is hinged with the transverse pulling piece, and the end part of the second branch is hinged with the middle position of the transverse rod.

6. The seat adjustable seating apparatus of claim 4, wherein: the transverse pulling piece comprises a first connecting rod and a second connecting rod which are in clamping fit; the first connecting rod and the second connecting rod are both plate-shaped pieces, the first connecting rod is vertically arranged and hinged with the control wrench, and the second connecting rod is transversely arranged and hinged with the first rotating rod.

7. The seat adjustable seating apparatus of claim 2, wherein: the motion conversion mechanism comprises a second rotating rod and a third rotating rod which are connected between the side rod and the locking rod; the second rotating rod is rotatably arranged in the rear bearing channel along the width direction of the base, one end of the second rotating rod is hinged with the side rod, and the other end of the second rotating rod is connected with the third rotating rod; the third rotating rod is an L-shaped rod which is vertically arranged, and the third rotating rod is rotatably arranged behind the locking rod; the side lever back-and-forth movement can drive the second dwang to rotate in the horizontal direction in order to pull the third dwang and rotate from top to bottom, and the third dwang is configured to rotate from top to bottom in order to act on the locking lever and rotate from top to bottom.

8. The seat adjustable seating apparatus of claim 7, wherein: a connecting spring is arranged between the second rotating rod and the third rotating rod, and two ends of the connecting spring are respectively connected to the second rotating rod and the third rotating rod; the side lever moves forward to drive the second rotating rod to horizontally rotate to pull the connecting spring backwards and drive the third rotating rod to rotate up and down.

9. The seat adjustable seating apparatus of claim 7, wherein: a first rotating support seat and a second rotating support seat which are spaced from each other in the front and back directions are arranged in the side bearing way, the back part of the locking rod is rotatably connected to the first rotating support seat, and a third rotating rod is rotatably connected to the second rotating support seat; and a horizontally extending abutting column is arranged on the third rotating rod and abuts against the upper end of the locking rod.

10. The seat adjustable seating apparatus of claim 9, wherein: in an unlocking state, the second rotating rod horizontally rotates to pull the third rotating rod backwards; the third rotating rod rotates up and down to enable the pressing column to act on the locking rod downwards to rotate, and the front end of the locking rod tilts.

11. The seat adjustable seating apparatus of claim 9, wherein: and a reset torsion spring is arranged between the locking rod and the first rotary supporting seat, one torsion arm of the reset torsion spring is arranged on the base, and the other torsion arm of the reset torsion spring is arranged on the locking rod.

12. The seat adjustable seating apparatus of claim 1, wherein: the front end of the side bearing channel is provided with a fixed seat, the fixed seat is provided with a vertical guide groove, and the locking pin is arranged in the guide groove in a penetrating mode and can move up and down along the guide groove.

13. The seat adjustable seating apparatus of claim 1, wherein: the chair seat is of a square frame structure, and the clamping parts are respectively arranged on the inner sides of the two sides of the chair seat; the clamping portion is arranged at the front end of the seat, and the locking pin is located below the clamping portion.

14. The seat adjustable seating apparatus of claim 2, wherein: and a limiting guide mechanism is further arranged between the cross rod and the rear bearing way, and comprises a limiting guide groove arranged in the rear bearing way along the front-rear direction and a limiting guide pin correspondingly arranged at the center of the cross rod.

15. The adjustable seat chair of claim 14, wherein: the limiting guide pin is also configured to be used as a rotating connecting shaft of the first rotating rod and the cross rod.