CN114451714B

CN114451714B - Seat with adjustable seat

Info

Publication number: CN114451714B
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: 2023-07-25
Anticipated expiration: 2042-01-07
Also published as: CN114451714A

Abstract

The utility model discloses a seat with an adjustable seat, which comprises: the chair seat can slide back and forth relative to the base; the base is of a frame-type structure with a hollowed-out 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, a locking rod and a control mechanism, wherein the main driving piece is arranged on the rear bearing channel and can move forwards and backwards, the locking rod is arranged in the two side bearing channels in a mirror image mode and can rotate up and down, and the control mechanism acts on the movement of the main driving piece; a motion conversion mechanism for converting the forward and backward 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 mode; the clamping part is provided with a plurality of locking grooves which are arranged at intervals along the front-back direction; the locking pin snaps into or out of the locking slot in response to movement of the locking lever to slidably lock or unlock the seat with the base.

Description

Seat with adjustable seat

Technical Field

The utility model relates to the field of seats, 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 level of the chair is directly related to the working life quality of people. At present, a plurality of office chairs in the market adopt a universal chassis, because the matching relation between the sizes of the backrest and the human-computer on the seat surface is not examined, the backrest, particularly the lumbar support, of the chair is separated from the lumbar part of a human body in the tilting process of a user, and a suspension gap is directly formed between the backrest and the lumbar support, so that the chair loses the support on the lumbar part of the human body in the tilting state, namely the so-called 'waist running', and the health problem that the spine of the human body cannot be effectively supported, so that a plurality of sitting times are caused; meanwhile, the universal chassis is adopted, so that the matching relation of the size of the human-machine of the backrest and the seat surface is not studied, the buttocks and the seat surface are relatively fixed in the tilting process of a user, and the backrest rubs upwards relative to the back of a human body, so that the discomfort of rubbing back and pulling clothes is caused, and the uncomfortable feeling is also caused. In addition, in the tilting process, the gravity center of the human body moves backwards along with the backward tilting of the backrest and deviates from the bearing gravity center of the seat, so that the user is easy to overturn, and potential danger exists. Aiming at the defects of office chairs in the current market, a seat-back linkage chair appears in the market, a seat can slide back and forth relative to a base, a user can rotate the seat back backwards in the tilting process, and the seat can slide forwards synchronously; the chair can always play a role in supporting the waist of a human body, and effectively avoid the occurrence of the 'waist running' condition; the buttocks of the user and the cushion synchronously move, so that the upward friction force 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 backward tilting process, the backrest can be supported only when the tilting angle reaches the maximum, and the user can lean stably. However, due to the different body types and resting habits of people, only one leaning angle obviously cannot adapt to the needs of most users.

The Chinese patent of CN201510136421.1 discloses a limit adjusting mechanism of a seat back linkage chair seat, wherein the limit adjusting mechanism is arranged in a base and comprises a limit adjusting handle, a limit base, a control line and a limit step slider, an inserting groove for inserting the limit step slider is arranged in the limit base, the limit step slider comprises a step part with a plurality of steps and an inserting part inserted in the inserting groove, and an elastic piece is arranged between the limit step 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 step sliding block. The limiting adjusting mechanism is arranged, the extending length of the limiting step sliding block is adjusted through adjusting the limiting adjusting handle, so that the chair seat is in contact with different steps of the limiting step sliding block, the distance that the chair seat can travel is further adjusted, and the inclination angle range of the backrest is further adjusted. The adjusting mechanism can adjust the positions of the backrest and the chair seat, but firstly, the limiting step sliding block is arranged on one side only, so that the backrest and the chair seat are locked only on one side, and the structure is unstable. Furthermore, the adjusting mechanism is arranged in the base in the front-back manner, so that the internal space of the base is completely occupied; only for bases with sufficient space.

For some bases with small interior spaces: the utility model patent of CN201921749559.9 discloses a chair, which comprises a seat support piece, wherein the seat support piece is provided with a lower part which is obliquely arranged relative to a horizontal plane, a drawing type foot rest adjusting mechanism is arranged on the seat support piece, the drawing type foot rest adjusting mechanism comprises a drawing rod which slides back and forth along the seat support piece, and a foot rest is rotatably arranged at the front end of the drawing rod; in the storage state, the footrest is obliquely turned back and downward relative to the drawing rod and stays at a first preset position, the drawing rod is retracted, 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 below the seat support, the footrest and the seat support are integrally connected in appearance, and the footrest and the seat support are harmonious in line and free of abrupt sense. The base of this chair is for dodging the accomodating of footrest, sets up to middle hollow out construction. The internal space of the base is narrow, and the spacing adjusting mechanism is obviously inconvenient to arrange.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide the seat with the adjustable seat, which is ingenious in design and reasonable in layout; the middle position of the base of the seat is hollowed out, so that the inner space of the base is narrow; the U-shaped layout channel is arranged according to the self structural shape of the base, and the locking and adjusting mechanism is reasonably arranged in the rear bearing channel and the side bearing channels at two sides; the locking rod is driven to rotate up and down by the front and back movement of the main driving piece, so that the inner space of the base is fully utilized, the locking function of the seat is effectively realized, and the locking rod is suitable for the base with small space. And the locking rods are arranged in the two side bearing channels, so that bilateral locking is realized, and the structure is more stable after locking.

The technical scheme of the utility model is realized as follows:

a seat adjustable comprising: 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-type structure with a hollowed-out 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 positioned at the left side and the right side respectively; the locking and adjusting mechanism is arranged in the layout channel of the base and acts on the chair seat; the locking adjusting mechanism comprises a main driving piece, a locking rod and a control mechanism, wherein the main driving piece is arranged on the rear bearing channel and can move forwards and backwards, the locking rod is arranged in the two side bearing channels in a mirror image mode and can rotate up and down, and the control mechanism is used for controlling the main driving piece to move; 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 mirror images at the two sides of the chair seat are provided with clamping parts matched with the locking pins; the clamping part is provided with a plurality of downward locking grooves with openings which are arranged at intervals along the front-back direction; the locking pin is blocked in or withdrawn from the locking groove in response to the up-and-down rotation of the locking rod so as to enable the chair seat to be locked or unlocked with the base in a sliding manner.

Preferably, the main driving piece is U-shaped, and comprises a transverse rod and side rods which are arranged transversely and are respectively positioned at two sides of the transverse rod, and the side rods are far away from the transverse rod end to form a power output part which is linked with the locking rod; the control mechanism is configured to act on the cross bar to move back and forth; the motion conversion mechanism is arranged between the side rod and the locking rod. The main driving piece is arranged to be of a left-right symmetrical U-shaped structure, the control mechanism controls the cross bars to move so as to drive the side bars on the two sides to synchronously move, and the side bars on the two sides are ensured to synchronously output power so as to drive the locking bars to move, so that the locking bars on the two sides keep synchronously moving.

Preferably, the central position of the rear bearing channel is provided with a seat support rod inserting part, and the main driving piece is in a U-shaped structure so as 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 the plug-in part of the seat support rod at the center of the rear bearing channel, so that the installation of the seat support rod is not interfered; so that the main driving piece does not occupy excessive area and can fully utilize the narrow space in the rear bearing channel.

Preferably, the control mechanism comprises a control wrench rotatably arranged at 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 channel along the width direction of the base, and one end of the transverse pulling piece is hinged with the control spanner; the wrench is controlled to rotate so as 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 utilizing the rotation action of the control wrench to drive the transverse pulling piece to move along the width direction of the base; the transverse rod is further driven to move along the front-back direction by utilizing the rotation action of the first rotating rod; realizing the control of the rotation of the wrench to drive the main driving piece to move back and forth; the design is ingenious, and the horizontal pulling piece is arranged in the rear bearing channel along the width direction of the base, so that the occupied space is small.

Preferably, the rear bearing channel 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 part, the main driving part moves back and forth in the wide part, the transverse pulling part is positioned in the narrow part and is positioned close to the edge of the narrow part, the first rotating rod is horizontally arranged, the first rotating rod is divided into a branch I, a branch II and an L-shaped corner formed at the joint of the branch I and the branch II, and the L-shaped corner of the first rotating rod is positioned at the transition part and 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 cross rod. The up-and-down rotation of the wrench is controlled, the up-and-down rotation is converted into the movement of the horizontal pulling piece along the width direction of the seat, and then the movement of the first rotating rod along the horizontal direction is converted into the rotation of the first rotating rod, so that the main driving piece is driven to move forwards and backwards along the depth direction of the seat; the rear bearing channel is divided into a wide part and a narrow part, and the wide part ensures the movable space of the main driving piece so that the movement stroke of the main driving piece is required to be preset; the first rotating rod is positioned in the transition part and the nearby 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 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 convenient to rotate and connect to one side of the control wrench, and the second connecting rod is horizontally arranged to be convenient to hinge with the first rotating rod, so that the connection process is more convenient; the two are connected in a clamping way, so that the connection is convenient; furthermore, the second connecting rod is transversely arranged, so that the hinge part of the second connecting rod and the first rotating rod are jointed up and down, and the occupied space in the longitudinal direction is reduced; the up-and-down rotation of the control wrench is converted into the left-and-right movement of the second connecting rod through the first connecting rod, and finally the first rotating rod is horizontally rotated.

Preferably, 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 at the rear of the locking rod; the side lever moves back and forth to drive the second rotating lever to rotate in the horizontal direction to pull the third rotating lever to rotate up and down, and the third rotating lever is configured to rotate up and down to act on the locking lever to rotate up and down. The front-back motion of the side rod is effectively converted into the up-down motion of the locking rod through the motion coordination of the second rotating rod and the third rotating rod; the second rotating rod is horizontally rotated and 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 is used as a power middle rotating piece in the moving direction, and the second rotating rod pulls the third rotating rod to rotate up and down to drive the locking rod to rotate up and down; the motion between the connecting rods is orderly layer by layer, and the force transmission effect is good; so that the locking rod moves smoothly and steadily.

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 rod moves forwards to drive the second rotating rod to horizontally rotate so as to pull the connecting spring backwards and drive the third rotating rod to vertically rotate. The connecting spring realizes the 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 design difficulty is possessed; the connecting spring can effectively solve the problem; and the connecting spring also enables the adjusting process to have good damping sense and provides reset elastic force.

Preferably, a first rotary supporting seat and a second rotary supporting seat which are spaced front and back are arranged in the side bearing channel, the rear part of the locking rod is rotationally connected to the first rotary supporting seat, and the third rotary rod is rotationally connected to the second rotary supporting seat; and a pressing column horizontally extending is arranged on the third rotating rod and is pressed against the upper end of the locking rod. When the third rotating rod rotates, the pressing column acts downwards on the locking rod to enable the rear end of the locking rod to rotate downwards, and therefore the front end of the locking rod is tilted.

Preferably, in the unlocked state, the second rotating lever is horizontally rotated to pull the third rotating lever rearward; the third rotating rod rotates up and down to enable the pressing column to act on the locking rod downwards to rotate, so that the front end of the locking rod is tilted.

Preferably, a reset torsion spring is arranged between the locking rod and the first rotation 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. Therefore, when the locking rod rotates, the reset torsion spring is elastically deformed and provides a trend of resetting the locking rod, so that the locking pin can be automatically reset.

Preferably, the front end of the side bearing channel is provided with a fixing seat, the fixing 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. So that the locking pin moves stably and smoothly up and down.

Preferably, the chair seat is in a frame structure in a shape of a Chinese character 'kou', and the clamping joints are respectively arranged on the inner sides of the two sides of the chair seat; the clamping part is arranged at the front end of the seat, and the locking pin is positioned below the clamping part.

Preferably, a limit guide mechanism is further arranged between the cross bar and the rear bearing channel, and the limit guide mechanism comprises a limit guide groove arranged in the rear bearing channel along the front-rear direction and a limit guide pin correspondingly arranged at the center of the cross bar. The main driving member can be stably moved in the front-rear direction of the base, and the movement range of the column driving member is limited.

Preferably, the limit guide pin is further configured 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 rod is used as a power input part and a sliding guide part; the design is ingenious, and the connection structure is saved.

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

1, the seat with the adjustable seat base is provided with the hollow middle position, so that the inner space of the base is narrow; therefore, a U-shaped layout channel A is arranged on the base, a main driving piece which moves forwards and backwards is arranged on the rear bearing channel, and strip-shaped locking rods are respectively arranged on the side bearing channels at two sides; the control mechanism enables the rotation control wrench to control the front and back movement of the main driving piece, and the motion conversion mechanism realizes the linkage between the main driving piece and the locking rod, so that the front and back movement of the main driving piece is converted into the up and down rotation of the locking rod; then the control spanner is acted on to rotate so as to drive the locking rod to rotate, thereby enabling the locking pin to be clamped into the locking groove, and conveniently realizing the locking of the chair seat and the base. The main driving part is arranged in the rear bearing channel and is arranged in the front and rear of the rear bearing channel, the locking rod is vertically rotated in the side bearing channel, the structural layout is reasonable and ingenious, the self structural space of the base is fully utilized, and the locking rod is suitable for a chassis with small space.

2, the main driving piece is arranged into a left-right symmetrical U-shaped structure, so that the control mechanism controls the cross rod to move to drive the side rods on two sides to synchronously move, and the side rods on two sides are ensured to synchronously output power to drive the locking rods to move, so that the locking rods on two sides keep synchronously moving. In addition, the U-shaped structure can avoid the plug-in part of the seat support rod at the center of the rear bearing channel, and does not interfere with the installation of the seat support rod; so that the main driving piece does not occupy excessive area and can fully utilize the narrow space in the rear bearing channel.

And 3, locking rods are arranged on the side bearing channels on two sides, so that when the chair is locked, the two locking rods are simultaneously locked with two sides of the chair seat, bilateral locking is realized, and after the chair is locked, the structure is firmer.

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 design difficulty is provided; the connecting spring can effectively solve the problem; and the connecting spring also enables the adjusting process to have good damping sense and provides reset elastic force. A reset torsion spring is also arranged between the locking rod and the base, so that the control spanner has good damping adjustment sense when acting; and the connecting spring and the reset torsion spring can provide elasticity to enable the locking rod to rotate and reset automatically, so that the locking pin can reset automatically and exit the locking groove.

Drawings

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

FIG. 2 is a side view of the chair seat according to the present utility model shown slid relative to the base;

FIG. 3 is a schematic perspective view showing the engagement of the locking pin with the locking groove in an embodiment of the present utility model;

FIG. 4 is a schematic perspective view of a chair seat and a base according to an embodiment of the present utility model;

FIG. 5 is a schematic perspective view of layout channels in a base according to an embodiment of the present utility model;

FIG. 6 is a schematic perspective view of a lock adjustment mechanism according to an embodiment of the present utility model;

FIG. 7 is a schematic perspective view of another angle of the lock adjustment mechanism according to an embodiment of the present utility model;

FIG. 8 is a schematic view of a partial structure of one side of a chassis in an embodiment of the present utility model;

FIG. 9 is a schematic perspective view of a lock adjustment mechanism according to an embodiment of the present utility model;

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

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

The reference numerals are as follows: a seat 1; a base 2; layout channel A; a seat support rod inserting part a; a rear carrying way 3; a side carrying way 4; a wide portion 3a; a narrow portion 3b; a transition portion 3c; a lock adjustment mechanism 5; a main driving member 6; a cross bar 6a; a side bar 6b; a locking lever 7; a control wrench 8; a locking pin 9; a clamping part 10; a locking groove 11; a tie rod 12; a first link 13a; a second link 13b; a first rotating lever 14; branch one 13a; branch two 13b; an L-shaped corner 13c; a limit guide groove 15; a limit guide pin 16; a second rotating lever 17; a third rotating lever 18; a connecting spring 19; a pressing post 20; a reset torsion spring 21; a fixing base 22; a guide groove 23; a first rotation support base 24; the second rotation support seat 25.

Description of the embodiments

In order that the above-recited objects, features and advantages of the present utility model will be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

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

In the description of the present utility model, the term "at least one" refers to one or more, 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 the respective components, such as front, rear, etc., described in a normal use state in which a user sits on the seat.

The specific embodiments of the present utility model are as follows:

as shown in fig. 1-11, the utility model provides a seat with an adjustable seat, which comprises a seat 1 and a base 2, wherein the seat 1 is slidably arranged on the base 2 and can slide back and forth relative to the base 2; the base 2 is of a frame-type structure with a hollowed middle, a U-shaped layout channel A with a front opening is arranged on the base 2, and the layout channel A comprises a rear bearing channel 3 positioned at the rear end and side bearing channels 4 positioned at the left side and the right side respectively. And a locking adjusting mechanism 5 acting on the seat 1 is arranged in the layout channel A, and the locking adjusting mechanism 5 comprises a main driving piece 6 which is arranged on the rear bearing channel 3 and can move back and forth, a strip-shaped locking rod 7 which is arranged in the two side bearing channels 4 in a mirror image way, and a control mechanism for driving the main driving piece 6 to move. Wherein a motion conversion mechanism is provided between each lock lever 7 and the main driving member 6, the motion conversion mechanism being configured to convert the forward and backward movement of the main driving member 6 into the up and down rotation of the lock lever 7; thereby the main driving piece 6 can be driven to move back and forth relative to the base 2 through the action control mechanism, and the locking rod 7 can be driven to rotate in the vertical direction relative to the base 2 by the back and forth movement of the main driving piece 6. The front end of the locking rod 7 is provided with a locking pin 9, and correspondingly, two sides of the chair seat 1 are provided with clamping parts 10 matched with the locking pin 9 in a mirror image mode; the clamping part 10 is provided with a plurality of locking grooves 11 with downward openings which are arranged at intervals along the front-back direction; the locking pin 9 moves upwards and is clamped into any locking groove 11 so as to enable the chair seat 1 and the base 2 to be relatively fixed; thus, the sliding locking and unlocking of the seat 1 can be realized by acting on the control mechanism, so that the seat 1 can stay at any position. The middle position of the base 2 is hollowed out, so that the inner space of the base 2 is narrow; the U-shaped layout channel A is arranged according to the shape of the base 2, and the locking and adjusting mechanism 5 is reasonably arranged in the rear bearing channel 3 and the side bearing channels 4 at two sides; the layout is reasonable and ingenious, and the locking function of the seat 1 is effectively realized. And the locking rods 7 are arranged in the two side bearing channels 4, so that bilateral locking is realized, and the structure is more stable after locking.

As shown in fig. 3-11, the main driving member 6 is in a U shape, and the main driving member 6 includes a transverse bar 6a and side bars 6b respectively positioned at two sides of the transverse bar 6a; the control mechanism is configured to act on the cross bar to move back and forth, the motion conversion mechanism is arranged between the side bar 6b and the locking bar 7, and the end of the side bar 6b far away from the cross bar 6a forms a power output part which is linked with the locking bar 7. Through setting the main driving piece 6 to bilateral symmetry 'U' -shaped 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 in order to drive locking lever 7 motion to make the locking lever 7 of both sides keep synchronous motion, the locking is more stable. The middle position of the rear bearing channel 3 is provided with a seat support rod inserting part a, and the main driving piece 6 is of a U-shaped structure and can avoid the seat support rod inserting part a, so that the installation of the seat support rod is not interfered; so that the main driving piece 6 does not occupy too much area and can fully utilize the narrow space in the rear bearing channel 3; and the U-shaped structure can save materials.

As shown in fig. 6 to 10, the control mechanism includes a control wrench 8 rotatably disposed at one side of the base 2, a cross member 12 disposed between the control wrench 8 and the cross bar 6a, and a first rotating lever 14, specifically: the transverse pulling piece 12 is arranged in the rear bearing channel 3 along the width direction of the base, one end of the transverse pulling piece 12 is hinged with the control spanner 8, and the control spanner 8 can drive the transverse pulling piece 12 to move outwards along the width direction of the base 2 through rotation; the first rotating rod 14 is in an L-shaped structure, the first rotating rod 14 is rotatably connected to the base 2, one end of the first rotating rod 14 is hinged to the end of the transverse pulling member, and the other end of the first rotating rod 14 is hinged to the middle position of the transverse rod 6a of the main driving member 6. By 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; the transverse rod 6a is further driven to move along the front-back direction by the rotation action of the first rotating rod 14; realizing the rotation of the control spanner 8 to drive the main driving piece 6 to move back and forth; the design is ingenious, and the horizontal pulling piece 12 is arranged in the rear bearing channel along the width direction of the base 2, so that the occupied space is small. Further, the method comprises the following steps: the rear bearing channel 3 comprises a wide part 3a in the middle and narrow parts 3b positioned at the left side and the right side of the wide part 3a, and a transition part 3c is formed between the wide part 3a and the narrow part 3b; 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 movement stroke of the main driving piece 6 is required to be preset; the transverse pulling piece 12 is positioned in the narrow part 3b and is positioned close to the edge of the narrow part 3b, and the transverse pulling piece 12 only moves back and forth at the 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 and is divided into a branch one 14a, a branch two 14b and an L-shaped corner 14c formed at the joint of the branch two 14a and the branch two 14b, and the L-shaped corner 14c of the first rotating rod 14 is positioned at the transition part 3c and 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 6a, 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 channel 3, and the occupied space is further reduced; so that the control mechanism can stably drive the movement of the main drive 6 in the rear carrier 3.

Furthermore, the cross-pull member 12 includes a first link 13a and a second link 13b which are positioned right and left in close proximity; 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 to the second connecting rod 13b; the other end of the second link 13b is hinged to the first rotating lever 14. The first connecting rod 13a and the second connecting rod 13b are plate-shaped pieces, and the first connecting rod 13a is vertically arranged so as to be convenient to rotationally connected to one side of the control wrench 8; 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 matched in a clamping way, so that the structure is simple, and the connection is more convenient; the second connecting rod 13b is transversely arranged so that the hinge part of the second connecting rod and the first rotating rod 14 are jointed up and down, and 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 up-and-down rotation of the control wrench 8 into the left-and-right movement of the second link 13b through the first link 13a, and finally enabling the first rotation lever 14 to realize the horizontal rotation.

In addition, a limit guide mechanism is further arranged between the cross bar 6a and the rear bearing channel 3, and the limit guide mechanism comprises a limit guide groove 15 arranged on the rear bearing channel 3 along the front-rear direction, and a limit guide pin 16 correspondingly arranged at the center of the cross bar 6a and with the lower end positioned in the limit guide groove 15. Thereby enabling the main driver 6 to stably move in the front-rear direction of the base 2 and restricting the movement range of the main driver 6. The limiting guide pin 16 is further configured to serve as a rotational connecting shaft between the first rotating lever 14 and the cross bar 6a, and can also function as a connection. The center of the cross bar 6a is then made to be both a power input part and a sliding guide part; the design is ingenious, and the connection structure is saved.

As shown in fig. 6-11, the locking bars 7 are disposed in the two side bearing channels 4, and a motion conversion mechanism for realizing linkage between each locking bar 7 and the side bar 6b on the corresponding side of the main driving member 6 is disposed between each locking bar 7 and the side bar, so that the main driving member 6 can synchronously drive the two locking bars 7 to synchronously move while moving back and forth. The specific method is as follows: 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 channel 3 along the width direction of the base 2, and the middle position of the second rotating rod 17 is rotationally connected with the base 2, so that the second rotating rod 17 can rotate in the horizontal direction; the second rotating rod 17 is spaced from the transverse pulling member 12 in a front-back manner, and then the transverse pulling member 12 is arranged to be close to the edge of the narrow portion 3b for movement, so that a movable space of the rear carrying channel 3 can be reserved, the second rotating rod 17 has space for rotation, and movement between the second rotating rod 17 and the transverse pulling member 12 is not interfered with each other. One end of a second rotating rod 17 is hinged on the side rod 6b, and the other end of the second rotating rod 17 is connected with a third rotating rod 18; the specific method is as follows: 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 supporting seat 24 and a second rotating supporting seat 25 which are spaced front and back are arranged in the side bearing channel 4, the rear part of the locking rod 7 is rotationally connected to the first rotating supporting seat 24, and the third rotating rod 18 is vertically arranged and the intersection point of the third rotating rod 18 is rotationally connected to the second rotating rod 17; the rear end of the third rotation lever 18 is connected to the second rotation lever 17, and the front end of the third rotation lever 18 is connected to the lock lever 7. Further, the method comprises the following steps: the second rotating rod 17 and the third rotating rod 18 are connected together through a connecting spring 19, and when the main driving member 6 moves forward, the second connecting rod 13b rotates to pull the third rotating rod 18 backward; the connecting spring 19 enables the control spanner 8 to have good damping sense when in action; the connecting 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 brought; the connecting spring 19 can effectively solve the problem; and the connecting spring 19 also gives a good damping effect 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 lock lever 7 by the movement cooperation 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 member in the movement direction, and the second rotating rod 17 pulls the third rotating rod 18 back and forth to rotate up and down to drive the locking rod 7 to rotate up and down; the motion between the connecting rods is orderly layer by layer, and the force transmission effect is good; so that the locking lever 7 moves smoothly and smoothly.

As shown in fig. 11, a horizontally extending pressing post 20 is disposed at the connection end of the third rotating rod 18 and the locking rod 7, and the pressing post 20 is pressed against the upper end of the locking rod 7, so that when the second rotating rod 17 pulls the third rotating rod 18 to rotate backward, the pressing post 20 acts downward on the locking rod 7 to rotate the rear end of the locking rod 7 downward, and the front end of the locking rod 7 is tilted. The locking lever 7 is a vertically arranged plate-shaped member, and a reset torsion spring 21 is further arranged between the locking lever 7 and the first rotation 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 lever 7, and the reset torsion spring 21 still has a reset trend after the locking lever 7 rotates, so that the locking lever 7 can reset automatically. Then, when the main driving piece 6 moves forwards through the motion conversion mechanism, the front end of the locking rod 7 is tilted upwards under the action of the second rotating rod 17 and the third rotating rod 18 so as to move the locking pin 9 upwards; under the action of the connecting spring 19 and the reset torsion spring 21, the control wrench 8 is enabled to have good damping sense, and when the control wrench 8 is loosened, the locking rod 7 can reset automatically, so that the locking pin 9 is reset and moves downwards.

As shown in fig. 3-8, a fixing seat 22 is further provided at the front end of the side bearing channel 4, a vertical guiding groove 23 is provided on the fixing seat 22, and the locking pin 9 is inserted into the guiding groove 23 and moves up and down along the guiding groove 23. As shown in fig. 3, the seat 1 is in a frame structure with a shape of a "mouth", the locking portions 10 are respectively disposed on the inner sides of two sides of the seat 1, and the locking pins 9 are just located below the locking portions 10 and can be moved upwards to be locked into the locking grooves 11. The seat is very simple in use and adjustment mode, and a user sits on the seat and can control the seat 1 to slide back and forth relative to the base 2; when the seat 1 is controlled to be locked at a certain position, the seat 1 and the base 2 can be relatively fixed only by acting on the control wrench 8 to rotate so that the locking pin 9 is clamped into the locking groove 11 upwards; if the lock is unlocked again, the control spanner 8 is rotated and reset; the operation is convenient and quick.

In addition, the seat with the adjustable seat base provided by the utility model has the advantages that although the middle position of the base 2 is hollowed out, the internal space of the base 2 is narrow; however, by arranging a U-shaped layout channel A on the base 2, arranging a main driving piece 6 which moves back and forth on the rear bearing channel 3, and arranging strip-shaped locking rods 7 on the side bearing channels 4 on two sides respectively; and the main driving piece 6 is driven by the control mechanism and the motion conversion mechanism, the locking rod 7 keeps synchronous motion with the main driving piece 6, and then the control spanner 8 is acted to rotate to drive the locking rod 7 to rotate, so that the locking pin 9 is clamped into the locking groove 11, and the locking of the seat 1 and the base 2 is realized. The structural layout is reasonable and ingenious, and the self structural space of the base 2 is fully utilized. And all be equipped with locking lever 7 on the side of both sides bears the weight of the way 4 for when locking, two locking levers 7 lock with the both sides of seat support 1 simultaneously, realize bilateral locking, make the structure more firm after the locking.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims

1. A seat adjustable, comprising:

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-type structure with a hollowed-out 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 positioned at the left side and the right side respectively;

the locking and adjusting mechanism is arranged in the layout channel of the base and acts on the chair seat; the locking adjusting mechanism comprises a main driving piece, a locking rod and a control mechanism, wherein the main driving piece is arranged on the rear bearing channel and can move forwards and backwards, the locking rod is arranged in the two side bearing channels in a mirror image mode and can rotate up and down, and the control mechanism is used for controlling the main driving piece to move; 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 mirror images at the two sides of the chair seat are provided with clamping parts matched with the locking pins; the clamping part is provided with a plurality of downward locking grooves with openings which are arranged at intervals along the front-back direction; the locking pin is blocked in or withdrawn from the locking groove in response to the up-and-down rotation of the locking rod so as to enable the chair seat to be locked or unlocked with the base in a sliding manner.

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

3. The seat adjustable of claim 2, wherein: the central position of the rear bearing channel is provided with a seat support rod inserting part, and the main driving piece is in a U-shaped structure to avoid the seat support rod inserting part.

4. The seat adjustable of claim 2, wherein: the control mechanism comprises a control wrench rotatably arranged at 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 channel along the width direction of the base, and one end of the transverse pulling piece is hinged with the control spanner; the wrench is controlled to rotate so as 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 of claim 4, wherein: the rear bearing channel 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 part, the main driving part moves back and forth in the wide part, the transverse pulling part is positioned in the narrow part and is positioned close to the edge of the narrow part, the first rotating rod is horizontally arranged, the first rotating rod is divided into a branch I, a branch II and an L-shaped corner formed at the joint of the branch I and the branch II, and the L-shaped corner of the first rotating rod is positioned at the transition part and 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 cross rod.

6. The seat adjustable 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 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 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 at the rear of the locking rod; the side lever moves back and forth to drive the second rotating lever to rotate in the horizontal direction to pull the third rotating lever to rotate up and down, and the third rotating lever is configured to rotate up and down to act on the locking lever to rotate up and down.

8. The seat adjustable 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 rod moves forwards to drive the second rotating rod to horizontally rotate so as to pull the connecting spring backwards and drive the third rotating rod to vertically rotate.

9. The seat adjustable of claim 7, wherein: a first rotary supporting seat and a second rotary supporting seat which are arranged in the side bearing channel at intervals from front to back are arranged in the side bearing channel, the rear part of the locking rod is rotationally connected to the first rotary supporting seat, and the third rotary rod is rotationally connected to the second rotary supporting seat; and a pressing column horizontally extending is arranged on the third rotating rod and is pressed against the upper end of the locking rod.

10. The seat adjustable of claim 9, wherein: in the 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, so that the front end of the locking rod is tilted.

11. The seat adjustable of claim 9, wherein: a reset torsion spring is arranged between the locking rod and the first rotation 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 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 way and can move up and down along the guide groove.

13. The seat adjustable of claim 1, wherein: the chair seat is of a frame structure in a shape of a Chinese character 'kou', and the clamping joints are respectively arranged on the inner sides of the two sides of the chair seat; the clamping part is arranged at the front end of the seat, and the locking pin is positioned below the clamping part.

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

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