CN211092856U

CN211092856U - Seat bracket structure and seat

Info

Publication number: CN211092856U
Application number: CN201921749556.5U
Authority: CN
Inventors: 何基; 蒋小兵; 虞红潮
Original assignee: UE Furniture Co Ltd
Current assignee: UE Furniture Co Ltd
Priority date: 2019-03-27
Filing date: 2019-10-17
Publication date: 2020-07-28
Anticipated expiration: 2029-10-17
Also published as: CN211092837U; CN110693228A; CN110693226A; CN110693220A; CN211092859U

Abstract

The utility model relates to a seat bracket structure and seat, the bracket structure includes: a support shaft having a first lock position and a second lock position in a circumferential direction; the footrest comprises a root end and a free end which are arranged oppositely, the root end is provided with an accommodating cavity for accommodating the supporting shaft, and the footrest can rotate relative to the supporting shaft; the movable locking piece is arranged in the accommodating cavity of the footrest, the movable locking piece moves along the radial direction of the supporting shaft, when the footrest rotates until the movable locking piece is jointed with the first locking position and the second locking position, the footrest and the supporting shaft are kept relatively fixed, and the footrest is in a locking state; when the movable locking piece is separated from the first locking position and the second locking position, the footrest is in an unlocked state and rotates around the supporting shaft; a seat, a footrest is foldable under a seat portion. Compared with the prior art, the utility model has the advantages of compact structure retrencies, the operation is convenient, occupation space is little, the modularization of being convenient for more, range of application is wider, the outward appearance is succinct pleasing to the eye.

Description

Seat bracket structure and seat

Technical Field

The utility model belongs to the technical field of furniture equipment, especially, relate to a seat bracket structure and seat.

Background

At present, more and more seats with the function of leg rest are available in the market, but the structures of the leg rest generally have the problems of complex structural design, inconvenient operation, large volume, heavy weight, high production cost, small overall design space of the seat, narrow application range and the like; particularly, the turning of the leg rest is usually realized by adopting at least two switches in the existing leg rest structure, and meanwhile, in the turning process, multiple components are turned synchronously, so that the structure is complex, the size is increased, and after the leg rest is folded, the leg rest often occupies a lot of space below the seat, so that the difficulty in setting other functions below the seat is increased, and further the seat is single in function, heavy in appearance and not attractive.

In view of the requirement of the current market on novel structure of office chairs, the seat parts of a plurality of chairs can be made into novel structures with double layers, hollow middle parts and the like, if the existing leg rest structure is applied to the seat parts, the whole seat structure is extremely heavy, and the addition of the functions of leg rest and the like to the chairs is more difficult; as a conventional article, the seat is particularly a market trend for novel office chairs such as light, thin and thin type and double-layer hollow type, so that how to provide a footrest structure which is compact and simple in structure, convenient to operate, small in occupied space, convenient to modularize and wide in application range is one of the problems to be solved urgently in the prior seat type.

In order to overcome the deficiencies in the prior art, the utility model provides a compact structure retrencies, the operation is convenient, occupation space is little, the modularization of being convenient for more, the wider seat bracket structure of range of application and seat.

Disclosure of Invention

In order to solve the technical problem, the utility model aims at providing a compact structure retrencies, the operation is convenient, occupation space is little, the modularization of being convenient for more, the wider seat bracket structure and seat of range of application.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a seat footrest structure comprising:

a support shaft having a first lock position and a second lock position in a circumferential direction;

the footrest comprises a root end and a free end which are oppositely arranged, wherein the root end is provided with an accommodating cavity for accommodating the supporting shaft, and the footrest can rotate relative to the supporting shaft;

the movable locking piece is arranged in the accommodating cavity of the footrest, the movable locking piece moves along the radial direction of the supporting shaft, when the footrest rotates until the movable locking piece is jointed with the first locking position or the second locking position, the footrest and the supporting shaft are kept relatively fixed, and the footrest is in a locking state; when the movable locking piece is separated from the first locking position and the second locking position, the footrest is in an unlocked state and rotates around the supporting shaft.

The utility model discloses at the bracket take the in-process that the activity locking piece is synchronous round the back shaft is rotatory, when the activity locking piece along the motion of back shaft radial direction and the epaxial first lock location of back or second locking position joint, the bracket is in the lock state of opening or drawing in, when activity locking piece and first lock location, second lock location separation, the bracket is in the unblock state and the bracket is rotatory around the back shaft, realizes the upset of bracket. The utility model discloses to realize that the structure of footrest locking, unblock concentrates on the root end of footrest, specifically place back shaft, activity locking piece etc. of footrest root end in including, the structure is very compact, and occupation space is little, more makes things convenient for the modularized design, and is more nimble, and the operation is convenient, and is very little to the holistic design influence of seat, and the range of application is wide, is applicable to the seat of different grade type structure, the die sinking of also being convenient for.

Preferably, the supporting shaft is provided with a sector protruding out of the surface of the supporting shaft along the radial direction, two transition steps are formed at the junction of the sector and the supporting shaft, the two transition steps correspond to the first locking position and the second locking position respectively, and the sector comprises a sector cambered surface attached to the inner wall of the accommodating cavity along the circumferential direction; when the movable locking piece is separated from the first locking position and the second locking position, the movable locking piece can rotate along the fan-shaped cambered surface.

When the movable locking piece is jointed and abutted with the first locking position of the transition step or the second locking position of the transition step, the footrest is in a locking state and cannot be turned over; when the movable locking piece is separated from the first locking position and the second locking position, the footrest is in an unlocking state, the movable locking piece slides along the fan-shaped cambered surface to rotate, and the footrest rotates around the supporting shaft.

Preferably, the inner wall of the accommodating cavity is provided with a convex clamping block, when the movable locking piece is in positioning joint with the first lock, one end of the convex clamping block is attached to the second locking position, and when the movable locking piece is in positioning joint with the second locking position, the other end of the convex clamping block is attached to the first lock.

The phenomenon that the footrest slightly rocks, overturns after the locking has been avoided in the setting of protruding fixture block, guarantees that the locking state of footrest is more stable, reduces the error, guarantees the travelling comfort, improves user experience.

Preferably, the accommodating cavity is provided with an accommodating groove, the movable locking piece is arranged in the accommodating groove, and the movable locking piece can realize displacement action of protruding from or lower than or equal to the notch of the accommodating groove.

When the movable locking piece moves towards the outside of the accommodating groove, the movable locking piece protrudes out of the inner wall of the accommodating cavity (namely the movable locking piece protrudes out of the notch of the accommodating groove), and the movable locking piece enters the first locking position or the second locking position to realize the stable locking state of the footrest, namely the footrest is completely opened or completely folded; when activity locking piece was to the inside displacement of holding tank, activity locking piece was less than or is on a level with holding intracavity wall (promptly activity locking piece is less than or is on a level with holding tank notch), and activity locking piece is fixed a position, the second lock and is locked the looks separation with first lock, realizes the upset of footrest.

Preferably, the footrest is rotatably connected with a key switch, and the key switch includes a rotating portion rotatably connected with the footrest, a pressing portion abutting against the movable locking member, and an external force pressing portion.

When external force presses the key switch, the abutting part on the key switch acts on the movable locking piece, inward displacement of the movable locking piece in the accommodating groove is achieved, the movable locking piece is positioned with the first lock and separated from the second lock, the movable locking piece enters an unlocking state, the footrest can be turned over relative to the supporting shaft, the key switch can be loosened when the movable locking piece contacts with the fan-shaped cambered surface, when the footrest rotates to a certain angle, the movable locking piece is separated from the fan-shaped cambered surface and automatically enters the first lock positioning or the second lock positioning, and the footrest or the locking state of opening or closing is achieved. The utility model discloses a mode of a key locking, a key unblock, the operation is convenient, and the operation is smooth and easy, labour saving and time saving.

Preferably, the pressing part of the key switch presses against the middle position of the movable locking piece.

Make the effort be located the intermediate position of activity locking piece, whole activity locking piece atress is even, high-efficient stability when having increased a key locking, unblock, and user experience is good.

Preferably, an elastic member abutting against the movable locking member and the bottom of the accommodating groove is arranged between the movable locking member and the accommodating groove.

The elastic piece is used for realizing the displacement action of pressing down and automatic resetting of the movable locking piece in the accommodating groove, and further realizing the displacement action of the movable locking piece or protruding out of or lower than or flat on the groove opening of the accommodating groove.

Preferably, the movable locking piece is in a strip shape, notches are formed in two ends of one side edge of the movable locking piece, slotted holes are formed in two ends of the bottom of the containing groove, and the elastic piece is located between the notches and the slotted holes on the same side.

The elastic component is located between the notch and the slotted hole on the same side, so that the elastic component is not easy to deviate and other unstable position changes, the acting force is uniform, and the stability of the elastic component during pressing and resetting actions is ensured.

Preferably, a reinforcing groove is fixedly embedded in the accommodating groove part between the groove holes at the two ends of the accommodating groove, the movable locking piece is arranged in the reinforcing groove, and the two ends of the movable locking piece are positioned at the outer sides of the two ends of the reinforcing groove.

When the footrest is unlocked and locked, the movable locking piece performs frequent displacement motion on the accommodating groove, so that the accommodating groove is easily abraded, and therefore, the reinforcing groove is tightly matched in the accommodating groove, the firmness of the accommodating groove is favorably improved, the service life is prolonged, and the stability of the movable locking piece during displacement is favorably improved; simultaneously, arrange slotted hole and elastic component in the strengthening groove outside, can simplify the structure of strengthening groove, the wearing and tearing to the holding tank are mainly because the main part of activity locking piece in addition, and the structure influence of activity locking piece both sides is little.

Preferably, the footrest comprises a body and a cover plate which can be buckled, a first accommodating cavity and a second accommodating cavity are respectively formed in the body and the cover plate, and the first accommodating cavity and the second accommodating cavity are spliced to form the accommodating cavity for accommodating the supporting shaft.

The mould opening and the assembly of the product are convenient, the production cost is reduced, and the later maintenance and the replacement are also facilitated.

Preferably, the cover plate is elongate and is located only at the root end.

The structure of the cover plate is simplified, and the cover plate is more convenient to assemble and disassemble during subsequent maintenance.

Preferably, the body is rotatably connected with a key switch, and the key switch comprises a rotating part rotatably connected with the body, a pressing part pressed against the movable locking piece, and an external force pressing part.

Preferably, the segments are at least two and are evenly distributed on the support shaft.

Stability, fastness when guaranteeing bracket board unblock upset and locking especially when user's shank acts on the bracket board of opening completely, can effectively support the holding down force that the shank brought, prevent the upset of bracket board and rock, improve user experience.

Preferably, the support shaft is a hexagonal shaft.

The longitudinal section of back shaft is the hexagon, can not take place to rotate after with the bracing piece joint, consequently can reduce the spare part of fixed usefulness such as screw, simplifies the structure, reduces the cost.

Preferably, the support shaft is fixedly clamped between two support rods which are parallel to each other.

A seat comprises a seat part and a seat leg rest structure, wherein the seat leg rest structure comprises a support shaft, a support shaft and a support rod, the support shaft is fixedly clamped between two support rods which are parallel to each other, and the support rods are connected with the lower part of the seat part in a sliding manner; when the movable locking piece is in positioning joint with the first lock, the footrest is in a folded state, the free end of the footrest is positioned below the supporting rod, and when the movable locking piece is in positioning joint with the second lock, the footrest is in an opened state, and the free end of the footrest is positioned in front of the supporting rod.

The support rod is connected with the lower part of the seat part in a sliding way, so that the position of the footrest in the front and back directions can be adjusted, the extension length of the footrest can be adjusted, corresponding adjustment can be carried out according to different height requirements of a human body, and the comfort and the application universality are improved; meanwhile, the footrest can be folded under the seat part through retraction of the supporting rod, so that the occupied space is saved, the seat is simple and attractive, the design influence on other functions of the seat, particularly the seat part is small, and the modular design is facilitated.

Preferably, an accommodating position is arranged below the seat part, and the accommodating position is matched with the shape of the footrest structure in the folded and furled state; the footrest comprises an outer surface and an inner surface, when the footrest is positioned in a folding and furling state and the support rod is completely retracted to the position below the seat part, the inner surface of the footrest is attached to the position below the seat part, and the outer surface of the footrest is spliced with the part of the seat part adjacent to the outer surface.

The footrest is folded under the seat part, the footrest and the seat part are connected into a whole in appearance, the lines are harmonious, the sense of unity is strong, the chair seat part is simple and attractive, the chair seat part applied to the prior hollowed-out and double-layer seat parts and other structures can not appear to be obtrusive and heavy, the application is wide, and various types of chair seat parts are practical.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a compact structure retrencies, the operation is convenient, occupation space is little, the modularization of being convenient for more, the wider seat bracket structure and seat of range of application. The utility model discloses at the bracket area activity locking piece synchronous round the rotatory in-process of back shaft, when the activity locking piece along the motion of back shaft radial direction and the epaxial first lock location of back or second lock position joint, the bracket is in the lock state of opening completely or drawing in completely, when activity locking piece and first lock location, second lock location separation, the bracket is in the unblock state and the bracket is rotatory around the back shaft, realizes the upset of bracket. The utility model discloses to realize that the structure of footrest locking, unblock concentrates on the back shaft, the activity locking piece of footrest one end in footrest one end and place in, and the structure is very compact, and occupation space is little, makes things convenient for the modularized design more in a flexible way, and the operation is convenient, and is very little to the holistic design influence of seat, and the range of application is wide, is applicable to the seat of different grade type structure, the die sinking of also being convenient for. And simultaneously, the utility model discloses draw in the footrest in the seat below, practice thrift occupation space, succinct pleasing to the eye, it is little to carry out the design influence of other functions to seat, especially seat, the modular design of being convenient for.

Drawings

FIG. 1 is a schematic view of the seat portion and the footrest in a fitted connection with the footrest structure and with the footrest in an open state according to the embodiment;

FIG. 2 is a schematic view of the structure of FIG. 1 from another angle;

FIG. 3 is a schematic view of the seat portion coupled to the footrest structure with the footrest collapsed under the seat portion according to the embodiment;

FIG. 4 is a schematic view of the structure of FIG. 3 at another angle;

FIG. 5 is a schematic view of an exploded structure among the leg rest structure, the support rod and the sleeve of the embodiment;

FIG. 6 is a partial schematic view of the leg rest structure, the support rod, and the sleeve according to the embodiment;

FIG. 7 is an enlarged view of portion A of FIG. 6;

FIG. 8 is a schematic view of a partially exploded configuration of an embodiment footrest;

FIG. 9 is an enlarged view of the portion B of FIG. 8;

FIG. 10 is a schematic view in section of a portion of the leg rest structure of an embodiment;

FIG. 11 is an enlarged view of the portion C of FIG. 10;

FIG. 12 is a schematic view of a portion of the internal structure of a leg rest structure, support bar, and sleeve of an embodiment;

FIG. 13 is an enlarged view of the portion D of FIG. 12;

FIG. 14 is a schematic view of another internal structure of a leg rest structure, a support rod, and a sleeve in a partially mated relationship according to an embodiment;

FIG. 15 is an enlarged view of section E of FIG. 14;

FIG. 16 is a schematic view of the movable locking member, the reinforcing groove, the elastic member, and the key switch according to the embodiment;

FIG. 17 is a schematic view of the structure of FIG. 16 at another angle;

FIG. 18 is a schematic longitudinal cross-sectional view of FIG. 16 at the center thereof;

FIG. 19 is a schematic cross-sectional view of the body and cover, the key switch, the movable locking member, the receiving groove, and the supporting shaft of the embodiment;

FIG. 20 is a schematic view showing the inner structure of the footrest in a locked state when the footrest is folded in the embodiment;

FIG. 21 is an enlarged view of portion F of FIG. 20;

FIG. 22 is an internal structural view showing an unlocked state in which the movable lock member is pressed in the reinforcing groove in the embodiment;

FIG. 23 is an enlarged view of the portion G of FIG. 22;

FIG. 24 is an internal schematic view of the footrest overturning process in the unlocked state according to the embodiment;

FIG. 25 is an enlarged schematic view of the portion H in FIG. 24;

FIG. 26 is a schematic view showing the internal structure of the footrest in the locked state during the turnover process of the footrest in the embodiment;

FIG. 27 is an enlarged view of section I of FIG. 26;

FIG. 28 is an internal view of the embodiment with the movable latch partially ejected out of the reinforcement slot and engaged with the second locking position and the footrest in a locked position with the footrest fully extended;

FIG. 29 is an enlarged view of the J portion of FIG. 28;

reference numerals: the support shaft 100, the first locking position 110, the second locking position 120, the sector 130, the sector arc 131, the footrest 200, the accommodating cavity 210, the protruding fixture block 211, the limiting surface e2111, the limiting surface f2112, the accommodating groove 212, the slot 2121, the key switch 220, the rotating part 221, the pressing part 222, the pressing part 223, the elastic part 230, the reinforcing groove 240, the body 250, the first accommodating cavity 251, the cover plate 260, the second accommodating cavity 261, the root end 270, the free end 280, the outer surface 291, the inner surface 292, the movable locking part 300, the notch 310, the limiting surface c320, the limiting surface d330, the support rod 400, the seat 500, the accommodating position 510 and the sleeve 600.

Detailed Description

The following describes in detail an embodiment of the present invention with reference to the drawings.

The present embodiment is described with reference to the orientation of the various components, such as front, rear, etc., in a normal use condition with the user seated in the seat.

Example (b):

a seat footrest structure, as shown in figures 1-29, comprising:

a support shaft 100 having a first lock position 110 and a second lock position 120 in a circumferential direction of the support shaft 100, the support shaft 100 being embodied as a hexagonal shaft;

a footrest 200, as shown in fig. 8, 20 and 21, wherein the footrest 200 includes a root end 270 and a free end 280, which are oppositely arranged, the root end 270 is provided with a containing cavity 210 for containing the supporting shaft 100, and the footrest 200 can rotate relative to the supporting shaft 100;

the movable locking piece 300 is arranged in the accommodating cavity 210 of the footrest 200, the movable locking piece 300 moves along the radial direction of the supporting shaft 100, when the footrest 200 rotates until the movable locking piece 300 is engaged with the first locking position 110 or the second locking position 120, the footrest 200 and the supporting shaft 100 are kept relatively fixed, and the footrest 200 is in a locking state; when the movable lock 300 is separated from the first and second lock positions 110 and 120, the footrest 200 is in the unlocked state and the footrest 200 is rotated about the support shaft 100.

Specifically, as shown in fig. 5 and 20-29, the supporting shaft 100 is provided with a sector 130 protruding from the surface of the supporting shaft 100 along the radial direction, the sector 130 is specifically a shaft sleeve which is sleeved on the supporting shaft 100 and is integrally formed with the supporting shaft 100, so as to ensure high connection strength, two transition steps are formed at the junction of the sector 130 and the supporting shaft 100, the two transition steps correspond to the first locking position 110 and the second locking position 120 respectively, and the sector 130 includes a sector arc surface 131 which is attached to the inner wall of the accommodating cavity 210 along the circumferential direction; when the movable latch 300 is separated from the first and second lock positions 110 and 120, the movable latch 300 may rotate along the arcuate segment surface 131.

In order to ensure the stability of the footrest 200 when locked, the inner wall of the accommodating cavity 210 is provided with a protruding latch 211, as shown in fig. 20 and 21, when the movable locking member 300 is engaged with the transitional step first locking position 110, one end of the protruding latch 211 is engaged with the transitional step second locking position 120, and the footrest 200 is in the closed locking state, as shown in fig. 28 and 29, when the movable locking member 300 is engaged with the transitional step second locking position 120, the other end of the protruding latch 211 is engaged with the transitional step first locking position 110, and the footrest 200 is in the open locking state.

The motion of the movable locking piece 300 along the radial direction of the supporting shaft 100 is realized in such a way that an accommodating groove 212 is formed in the accommodating cavity 210, the movable locking piece 300 is arranged in the accommodating groove 212, an elastic piece 230 which is abutted against the movable locking piece 300 and the accommodating groove 212 is arranged between the movable locking piece 300 and the bottom of the accommodating groove 212, the elastic piece 230 is specifically a pressure spring, and the movable locking piece 300 can realize the displacement action which is protruded from or lower than or equal to the notch of the accommodating groove 212. The footrest 200 is rotatably connected with a key switch 220, and the key switch 220 comprises a rotating part 221 rotatably connected with the footrest 200, a pressing part 222 pressed against the movable locking piece 300, and an external force pressing part 223; the pressing portion 222 of the key switch 220 presses against the middle position of the movable locking member 300, so that the acting force is uniform and effective, when the pressing portion 223 is acted by an external force, the rotating portion 221 rotates, meanwhile, the pressing portion 222 is driven to press the movable locking member 300 downwards, unlocking is achieved, the footrest 200 is rotated, when the pressing portion 223 is released by rotating a certain angle, the movable locking member 300 can be reset and popped out to enter the first locking position 110 or the second locking position under the action of the pressure spring.

In order to ensure the stability of the movable locking piece 300 during displacement in the receiving groove 212, the movable locking piece 300 is in a strip shape, the two ends of one side of the movable locking piece 300 are both provided with notches 310, the two ends of the bottom of the receiving groove 212 are both provided with slots 2121, and the elastic piece 230 is located between the notches 310 and the slots 2121 on the same side; a reinforcing groove 240 is fixedly embedded in the portion of the receiving groove 212 between the slot holes 2121 at the two ends of the receiving groove 212, the movable locking member 300 is disposed in the reinforcing groove 240, and the two ends of the movable locking member 300 are located at the outer sides of the two ends of the reinforcing groove 240.

In order to facilitate the opening and assembly, the footrest 200 includes a body 250 and a cover plate 260 that can be buckled, the body 250 and the cover plate 260 are respectively provided with a first accommodating cavity 251 and a second accommodating cavity 261, and the first accommodating cavity 251 and the second accommodating cavity 261 are spliced to form the accommodating cavity 210 for accommodating the support shaft 100; specifically, the cover 260 is elongated, the cover 260 is only located at the root end 270, and the key switch 220 is specifically rotatably connected to the body 250 of the footrest 200.

The specific operational procedure for locking and unlocking the footrest 200 is as follows:

for convenience of description, the support shaft 100, the movable locker 300, and the protrusion latch 211 will be further described:

the first locking position 110 and the second locking position 120 on the support shaft 100 are respectively a limiting surface a and a limiting surface b, the two ends of the movable locking member 300 are respectively a limiting surface c320 and a limiting surface d330, and the two ends of the protruding locking block 211 are respectively a limiting surface e2111 and a limiting surface f 2112.

As shown in fig. 20-21, the movable locking member 300 protrudes from the inner wall of the accommodating cavity 210 and engages with the first locking position 110, specifically, the limiting surface c320 abuts against the first locking position 110, and the limiting surface e2111 abuts against the second locking position 120, so that the footrest 200 is in the locked state of being folded and folded;

then, the pressing portion 223 of the key switch 220 is pressed, the pressing portion 222 acts on the movable locking member 300, as shown in fig. 22-23, the movable locking member 300 moves inward in the accommodating groove 212, the movable locking member 300 is lower than or level with the notch of the accommodating groove 212, the limiting surface c320 is separated from the first locking position 110, and enters an unlocking state, and the footrest 200 can rotate around the supporting shaft 100; as shown in fig. 24-25, the movable locking member 300 rotates around the track of the fan-shaped arc 131, but of course, when the movable locking member 300 contacts with the fan-shaped arc 131, the push switch 220 may be released until the movable locking member 300 is separated from the fan-shaped arc 131 as shown in fig. 26-29, and the movable locking member 300 automatically returns to the second locking position 120 under the action of the elastic member 230, specifically, the limiting surface d330 abuts against the second locking position 120, the limiting surface f2112 abuts against the first locking position 110, and at this time, the footrest 200 is in the unlocked state.

A seat, as shown in fig. 1-6, comprising a seat part 500, including the above-mentioned seat footrest structure, the support shaft 100 is fixedly clamped between two parallel support rods 400, the support rods 400 are slidably connected with a sleeve 600 below the seat part 500, and the sleeve 600 is fixedly connected below the seat part 500; when the movable lock 300 is engaged with the first lock position 110, the footrest 200 is in the folded-in state, and the free end 280 of the footrest 200 is positioned below the support bar 400, and when the movable lock 300 is engaged with the second lock position 120, the footrest 200 is in the opened state, and the free end 280 of the footrest 200 is positioned in front of the support bar 400.

In order to ensure the overall beauty and tidiness of the seat after the footrest 200 is folded, as shown in fig. 2, an accommodating position 510 is arranged below the seat part 500, and the accommodating position 510 is matched with the structural shape of the footrest 200 in the folded and folded state; as shown in FIG. 4, the footrest 200 includes an outer surface 291 and an inner surface 292, when the footrest 200 is in the folded and folded state and the support rod 400 is fully retracted to the position below the seat 500, the inner surface 292 of the footrest 200 is attached to the position below the seat 500, and the outer surface 291 of the footrest 200 is joined to the portion of the seat 500 adjacent to the outer surface 291, so that the lines are smooth and the integrity is strong.

The above description in this specification is merely illustrative of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A seat footrest structure, comprising:

a support shaft (100), the support shaft (100) having a first lock position (110) and a second lock position (120) in a circumferential direction;

a footrest (200), wherein the footrest (200) comprises a root end (270) and a free end (280) which are oppositely arranged, the root end (270) is provided with a containing cavity (210) for containing the support shaft (100), and the footrest (200) can rotate relative to the support shaft (100);

the movable locking piece (300) is arranged in the accommodating cavity (210) of the footrest (200), the movable locking piece (300) moves along the radial direction of the supporting shaft (100), when the footrest (200) rotates to the state that the movable locking piece (300) is engaged with the first locking position (110) or the second locking position (120), the footrest (200) and the supporting shaft (100) are kept relatively fixed, and the footrest (200) is in a locking state; when the movable lock member (300) is separated from the first lock position (110) and the second lock position (120), the footrest (200) is in an unlocked state and the footrest (200) rotates about the support shaft (100).

2. A seat leg rest structure as claimed in claim 1, wherein: the supporting shaft (100) is provided with a sector (130) protruding out of the surface of the supporting shaft (100) along the radial direction, two transition steps are formed at the junction of the sector (130) and the supporting shaft (100), the two transition steps respectively correspond to the first locking position (110) and the second locking position (120), and the sector (130) comprises a sector cambered surface (131) attached to the inner wall of the accommodating cavity (210) along the circumferential direction; when the movable locking piece (300) is separated from the first locking position (110) and the second locking position (120), the movable locking piece (300) can rotate along the fan-shaped arc surface (131).

3. A seat leg rest structure as claimed in claim 2, wherein: the inner wall of the accommodating cavity (210) is provided with a protruding clamping block (211), when the movable locking piece (300) is connected with the first locking position (110), one end of the protruding clamping block (211) is attached to the second locking position (120), and when the movable locking piece (300) is connected with the second locking position (120), the other end of the protruding clamping block (211) is attached to the first locking position (110).

4. A seat leg rest structure as claimed in claim 1, wherein: an accommodating groove (212) is formed in the accommodating cavity (210), the movable locking piece (300) is arranged in the accommodating groove (212), and the movable locking piece (300) can realize displacement action which protrudes out of or is lower than or is parallel to the notch of the accommodating groove (212).

5. A seat leg rest structure as claimed in claim 1 or 4, wherein: the foot rest (200) is connected with a key switch (220) in a rotating mode, and the key switch (220) comprises a rotating portion (221) connected with the foot rest (200) in a rotating mode, a pressing portion (222) pressed against the movable locking piece (300) and an external force pressing portion (223).

6. A seat leg rest structure as claimed in claim 5, wherein: the pressing part (222) of the key switch (220) presses against the middle position of the movable locking piece (300).

7. A seat leg rest structure as claimed in claim 4, wherein: an elastic piece (230) which is abutted against the movable locking piece (300) and the bottom of the accommodating groove (212) is arranged between the movable locking piece and the accommodating groove.

8. A seat leg rest structure as claimed in claim 7, wherein: the movable locking piece (300) is in a long strip shape, notches (310) are formed in two ends of one side edge of the movable locking piece (300), slotted holes (2121) are formed in two ends of the bottom of the accommodating groove (212), and the elastic piece (230) is located between the notches (310) and the slotted holes (2121) on the same side.

9. A seat leg rest structure as claimed in claim 8, wherein: a reinforcing groove (240) is fixedly embedded in the part of the accommodating groove (212) between the slotted holes (2121) at the two ends of the accommodating groove (212), the movable locking piece (300) is arranged in the reinforcing groove (240), and the two ends of the movable locking piece (300) are positioned at the outer sides of the two ends of the reinforcing groove (240).

10. A seat leg rest structure as claimed in claim 1, wherein: the footrest (200) comprises a body (250) and a cover plate (260) which can be buckled, a first accommodating cavity (251) and a second accommodating cavity (261) are respectively formed in the body (250) and the cover plate (260), and the first accommodating cavity (251) and the second accommodating cavity (261) are spliced to form the accommodating cavity (210) for accommodating the support shaft (100).

11. A seat leg rest structure as claimed in claim 10, wherein: the cover plate (260) is elongated, and the cover plate (260) is located only at the root end (270).

12. A seat leg rest structure as claimed in claim 10, wherein: the body (250) is rotatably connected with a key switch (220), and the key switch (220) comprises a rotating part (221) rotatably connected with the body (250), a pressing part (222) pressed against the movable locking piece (300) and an external force pressing part (223).

13. A seat leg rest structure as claimed in claim 2, wherein: the fan-shaped bodies (130) are at least two and are evenly distributed on the supporting shaft (100) at intervals.

14. A seat comprising a seat portion (500), characterized in that: comprising the seat footrest structure according to any of claims 1 to 13, wherein the support shaft (100) is fixedly clamped between two mutually parallel support bars (400), the support bars (400) being slidably connected below the seat (500); when the movable lock (300) is engaged with the first lock position (110), the footrest (200) is in a folded state, the free end (280) of the footrest (200) is positioned below the support bar (400), and when the movable lock (300) is engaged with the second lock position (120), the footrest (200) is in an open state, and the free end (280) of the footrest (200) is positioned in front of the support bar (400).

15. A seat according to claim 14, wherein: an accommodating position (510) is arranged below the seat part (500), and the accommodating position (510) is matched with the structural shape of the footrest (200) in the folded and furled state; the footrest (200) comprises an outer surface (291) and an inner surface (292), when the footrest (200) is located in a folded and furled state and the supporting rod (400) is completely retracted to be below the seat part (500), the inner surface (292) of the footrest (200) is attached to the lower part of the seat part (500), and the outer surface (291) of the footrest (200) is partially spliced with the seat part (500) adjacent to the outer surface (291).