CN211092859U

CN211092859U - Chair (Ref. TM. chair)

Info

Publication number: CN211092859U
Application number: CN201921749559.9U
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: CN211092856U; CN110693228A; CN110693226A; CN110693220A; CN211092837U

Abstract

The utility model relates to a chair, which comprises a seat supporting piece, wherein the seat supporting piece is provided with a lower part which is obliquely arranged relative to a horizontal plane, a pull-out type footrest adjusting mechanism is arranged on the seat supporting piece, the pull-out type footrest adjusting mechanism comprises a pull-out rod which slides back and forth along the seat supporting piece, and a footrest is rotationally arranged at the front end of the pull-out rod; in a storage state, the footrest is obliquely turned backwards and downwards relative to the drawing rod and stays at a first preset position, the drawing rod returns, and the footrest is backwards close to and depends on the lower part of the seat support piece; in the open state, the footrest rotates from bottom to top and forwards to a second preset position for supporting the feet of the human body; when the footrest is folded under the seat supporting piece, the footrest and the seat supporting piece are connected into a whole in appearance, and the lines are harmonious and have no obtrusive feeling.

Description

Chair (Ref. TM. chair)

Technical Field

The utility model belongs to the technical field of furniture equipment, especially, relate to a chair.

Background

There are more and more seats of taking the bracket function in the existing market, and these seats have pull formula commonly and put foot portion, and leg rest portion has the level setting, also has the upset setting.

For the horizontally arranged foot rest part, the foot rest part is arranged at the front end of the drawing and pulling rod, and the stretching and retraction adjustment of the foot rest part is realized by sliding the drawing and pulling rod; when the chair is used, the drawing rod is drawn out, and the leg rest part is positioned at the front end of the chair seat to play a role of leg rest; when the chair is not used, the drawing rod is retracted, and the leg rest part is retracted to the position below the chair seat.

For the foot rest part arranged in a turnover way, the foot rest part is as follows: the utility model patent of "CN 201810182307.6" discloses a chair, and it includes the seatpad, inclines to face upward adjustment mechanism, pedal, the seatpad below is equipped with the slide rail, and the relative seatpad of slide rail is flexible to be slided, and pedal establishes at the outer tip of slide rail with rotating. The inclination adjusting mechanism comprises a base, a spring front base and a block, wherein the block is arranged in the base, and the lower end of the block extends out of the base. When the sliding rail contracts and the pedal returns to the position below the base, the pedal upwards extrudes the blocking block to drive the blocking block to ascend, and the blocking block ascends to block the sliding of the front base of the spring, so that the inclination angle adjusting range of the inclination adjusting mechanism is narrowed. The utility model discloses pedal retractable is in the base below, and the chair is when being in the seat function, and the range of change of the angle of pitch of inclining is little, makes things convenient for people's seat to stand, is favorable to the official working, and when the chair was in the function of lying, pedal stretches out, and the angle of pitch of inclining can change by a wide margin, is favorable to having a rest.

The problems of the above patents are: when the pedal is in a folded state, the pedal is spaced from the bottom surface of the seat cushion when viewed from the side, so that the pedal is obtrusive and not beautiful enough.

Similarly, the publication numbers are: EP0680713B1 discloses a resting chair in which the footrest 10, when not in use, drops below the front end of the seat 15, without affecting the legs, but is not aesthetically pleasing and is similarly obtrusive.

For another example, U.S. patent publication No. US2013/0181498 discloses a leg rest assembly applied to a seat, in which a leg rest portion 3 is turned to a horizontal posture to facilitate leg rest when in use; when not in use, the leg rest part 3 is turned downwards to the lower part of the seat part and is in a drooping state; similarly, although the footrest section 3 can serve as a footrest, it hangs down in isolation below the seat section when stored, i.e., not in use, and is not aesthetically pleasing because it is obtrusive when viewed from the side.

Disclosure of Invention

In order to solve the technical problem, the utility model aims at providing a chair, this chair adopt pull formula bracket mechanism, are equipped with the footrest that can overturn at pull formula bracket mechanism front end, and this footrest when the state of accomodating, returns back and relies on the seat support piece lower part of chair, and the footrest shape and seat support piece lower part surface profile phase-match, and the combination degree is high, has avoided sharp sensation, makes whole more pleasing to the eye.

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

a chair 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 pull-out type footrest adjusting mechanism is arranged on the seat support piece, the pull-out type footrest adjusting mechanism comprises a pull-out rod which slides back and forth along the seat support piece, and a footrest is rotationally arranged at the front end of the pull-out rod; in a storage state, the footrest is obliquely turned backwards and downwards relative to the drawing rod and stays at a first preset position, the drawing rod returns, and the footrest is backwards close to and depends on the lower part of the seat support piece; under 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.

Preferably, the step of rearwardly approaching and depending from the lower portion of the seat support means: the foot rest is provided with an outer surface for supporting the feet of the human body and an inner surface opposite to the outer surface; the inner surface has an inner region and a peripheral region, at least the peripheral region of the inner surface is attached to the lower portion of the seat support. Therefore, when viewed from the side, the footrest and the seat support are obliquely attached together and combined with each other, so that the obtrusive feeling is avoided. The peripheral area of the inner surface is the area from the edge of the inner surface to 3-15mm inside the inner surface.

Preferably, the seat support is of a frame-type structure, and the lower structure of the seat support is as follows: the middle part is hollow, the two sides form inclined lower surfaces, and the left side and the right side of the peripheral edge area of the inner surface are attached to the inclined lower surfaces at the two sides of the lower part of the seat supporting piece. The seat supporting piece adopts a frame type structure so as to be convenient for installing the drawing rod.

Preferably, the seat supporting piece is of a frame structure, the lower part of the seat supporting piece is of a lower surface structure with a hollow middle part and two inclined sides, and the footrest is buckled at the hollow part.

Preferably, the step of rearwardly approaching and depending from the lower portion of the seat support means: the foot rest is provided with an outer surface for supporting the feet of the human body and an inner surface opposite to the outer surface; a gap of 1-8mm is left between the inner surface and the inclined lower surface of the lower part of the seat support in the front-rear direction of the seat support. In this scheme, the footrest does not laminate seat support piece completely, but leaves a bit clearance, can reach the utility model discloses a purpose equally.

Preferably, the step of rearwardly approaching and depending from the lower portion of the seat support means: the seat supporting piece is formed by combining an upper base plate and a lower base plate, the lower base plate is provided with a lower part which is obliquely arranged relative to a horizontal plane, and the lower part is provided with an oblique lower surface; the inner surface is provided with an inner area and a peripheral area, and the peripheral area of the inner surface covers and is attached to the inclined lower surface of the lower bottom plate. The upper bottom plate is configured to be connected with sponge, the lower bottom plate is a plastic plate and is configured to be connected with a chassis of the chair, and the chassis is further connected with an air rod or a support rod; the peripheral area of the footrest is attached to the lower bottom plate, and the footrest is supported by the lower bottom plate and has no sharp feeling in appearance.

Preferably, the seat supporting part is of a frame type structure, the seat supporting part comprises a seat frame and a supporting part positioned below the seat frame, the rear end of the supporting part is connected with the rear end of the seat frame, the length of the supporting part is shorter than that of the seat frame, two sides of the front end of the supporting part are respectively connected to the left end and the right end of the front part of the seat frame through two obliquely arranged supporting columns, the supporting columns form the lower part of the seat supporting part, and the supporting columns are provided with front surfaces obliquely arranged relative to a horizontal plane; in the stowed state, a peripheral region of the inner surface of the footrest covers the front surfaces of the two support posts. In this scheme, the front surface of support column is the lower surface of seat support piece lower part promptly, and the portion of holding is used for supporting whole seat support piece, and the peripheral region of footrest internal surface covers the front surface of two support columns for the footrest can be supported, and is in the same place closely with the support column.

Preferably, at the first preset position, the included angle between the whole footrest and the horizontal plane is 10-45 degrees. Therefore, the footrest is close to the drawing rod as much as possible, the lower inclined angle of the seat supporting piece is as small as possible, and the whole body is lighter and thinner.

Preferably, the inner surface of the footrest is uneven, the inner area is recessed, and the peripheral edge area is located outward of the inner area. The footrest is composed of a frame support and a footrest support plate, wherein the inner surface of the footrest support surrounded by the frame support is an inner region, and the surface of the frame support forms a peripheral region.

Preferably, the two drawing rods are arranged in bilateral symmetry, a support shaft is arranged at the front ends of the two drawing rods, and the support shaft and the two drawing rods are relatively fixed; the footrest is connected with the supporting shaft in a rotating way.

Preferably, the support shaft has a first lock position and a second lock position in the circumferential direction; the footrest comprises a root end and a free end which are oppositely arranged, the root end is provided with an accommodating cavity avoiding the supporting shaft, and the footrest rotates around the supporting shaft through the root end. When the first lock is positioned, the footrest is at a first preset position; in the second locked position, the footrest is in a second preset position.

Preferably, the locking device further comprises a movable locking piece, 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 to the state that the movable locking piece is engaged 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. The support shaft is preferably a hexagonal shaft. The rotary rod can not rotate after being clamped with the drawing rod, thereby reducing the number of parts for fixing such as screws and the like, simplifying the structure and reducing the cost.

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

the utility model provides a pair of chair, the footrest is when the state of accomodating, is close to and relies on a support piece with a support piece's slope lower part, and when the footrest draws in present support piece below promptly, footrest and a support piece seem in appearance even as an organic whole, and the lines are harmonious, and the associative perception is strong, and is succinct pleasing to the eye, uses the seat support piece of present fretwork, double-deck isotructure can not seem obtrusive and heavy yet, uses extensively, practical each type seat support piece structure.

Drawings

FIG. 1 is a schematic view of the seat support and 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 support and the footrest structure in conjunction with each other and the footrest is folded under the seat support in accordance with the embodiment 1;

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

FIG. 5 is a schematic view of an explosive structure among the leg rest structure, the drawing rod and the sleeve of the embodiment 1;

FIG. 6 is a partial structural view of the leg rest structure, the drawing rod and the sleeve of the embodiment;

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

FIG. 8 is a schematic view of a partially exploded structure of the footrest of embodiment 1;

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

FIG. 10 is a sectional view of a part of the leg rest structure of the embodiment 1;

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

FIG. 12 is a partial internal structural view of a leg rest structure, a drawing rod and a sleeve of the embodiment 1;

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

FIG. 14 is another schematic internal structure view of the leg rest structure, the drawing rod and the sleeve in partial matching relationship in the embodiment 1;

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

FIG. 16 is a schematic view showing the structure of the movable locking member cooperating with the reinforcing groove, the elastic member and the push switch in accordance with embodiment 1;

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 showing the structure of the body and the cover, the key switch, the movable locking member, the receiving groove, and the supporting shaft of embodiment 1;

FIG. 20 is a schematic view showing the internal structure of the footrest in the locked state in accordance with embodiment 1;

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 reinforcement groove in embodiment 1;

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

fig. 24 is an internal structural view of the footrest overturning process in the unlocked state of embodiment 1;

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

FIG. 26 is a schematic view showing the inside structure of the footrest in the locked state during the turnover of the footrest in embodiment 1;

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

FIG. 28 is an internal view showing the locked state of the footrest in full extension with the movable lock member partially ejected out of the reinforcement groove and engaged with the second lock position in accordance with embodiment 1;

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

reference numerals: the support shaft 100, the first lock positioning 110, the second lock positioning 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 pull rod 400, the seat support 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 1:

a chair of this embodiment, as shown in fig. 1-4, includes a seat support 500, the seat support 500 has a lower portion inclined with respect to a horizontal plane, a pull-out type leg rest adjusting mechanism is disposed on the seat support 500, the pull-out type leg rest adjusting mechanism includes a pull-out rod 400 sliding back and forth along the seat support 500, and a leg rest 200 is rotatably disposed at a front end of the pull-out rod 400; in the storage state, the footrest 200 is tilted backwards and downwards relative to the drawing rod 400 and is turned over and stays at a first preset position, the drawing rod 400 is retracted, and the footrest 200 is backwards close to and depends on the lower part of the seat support 500; in the open state, the footrest 200 is rotated from the lower side up and forward to a second preset position for supporting the feet of the human body.

Specifically, the rearward approach and resting of the footrest 200 on the lower portion of the base support 500 refers to: the footrest 200 has an outer surface 291 for supporting the foot of the person and an inner surface 292 disposed opposite the outer surface 291; the inner surface 292 further has an inner region 2921 and a peripheral region 2922, the peripheral region 2922 is located around the inner region 2921, the footrest 200 is composed of the frame support 201 and the footrest support plate 202, the outer surface 291 is formed on the footrest support plate 202, the inner surface of the footrest support plate 202 surrounded by the frame support 201 is the inner region 2921, and the surface of the frame support 201 facing the footrest support plate 202 is the peripheral region 2922.

The inner region 2921 is concave, so that in the stowed position, the peripheral region 2922 of the inner surface 292 abuts the lower portion of the seat support 500; i.e., peripheral region 2922 of inner surface 292 matches the lower contour, shape of seat support 500.

More specifically, the seat support 500 is a frame structure, the seat support 500 includes a seat frame 700 and a supporting portion 800 located below the seat frame 700, the seat frame 700 is a rectangular frame, and is configured with mesh cloth to support a human body to sit thereon; the rear end of the supporting part 800 is connected with the rear end of the seat frame 700, the length of the supporting part 800 is shorter than that of the seat frame 700, the bottom surface of the supporting part 800 is provided with a cavity 801, a chassis 802 is embedded in the cavity 801, the chassis 802 is connected with a supporting rod 803, and the supporting rod 803 can be an air rod.

The two sides of the front end of the supporting part 800 are connected to the left and right ends of the front part of the seat frame 700 through two obliquely arranged supporting columns 900, so that the two supporting columns 900 and the seat frame 700 form the following shapes: namely, the middle part is a hollow part 9002, and the two sides form an inclined lower surface 9001; the width of the footrest 200 is larger than the width of the cutout 9002, and when the footrest 200 is in the storage state, the left and right sides of the peripheral edge region 2922 of the inner surface 292 are bonded to the inclined lower surfaces 9001 on both sides of the lower portion of the seat support 500.

The support column 900 forms a lower portion of the seat support 500, the support column 900 having a front surface, i.e., a lower surface 9001, disposed obliquely to the horizontal plane; in the stowed state, the peripheral edge area of the inner surface of the footrest 200 covers the front surfaces of the two support columns 900.

The rotation control of the footrest is realized by adopting a chair footrest structure, as shown in fig. 1 to 29, 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, the support shaft 100 being specifically a hexagonal shaft.

As shown in fig. 8, 20 and 21, the footrest 200 includes a base end 270 and a free end 280 which are provided opposite to each other, and the base end 270 is provided with a receiving cavity 210 for receiving the support shaft 100, and the footrest 200 is rotatable with respect 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 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.

When the movable locker 300 is engaged with the first locker position 110, the footrest 200 is at the first preset position; when the movable latch 300 is engaged with the second locking position 120, the footrest 200 is in the second preset position.

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, and simultaneously drives the pressing portion 222 to press the movable locking member 300 downwards, so as to unlock and rotate the footrest 200, and 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 120 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 chair, as shown in fig. 1-6, comprising a seat support 500, including the chair leg rest structure as described above, wherein the support shaft 100 is fixedly clamped between two parallel pull rods 400, the pull rods 400 are slidably connected with a sleeve 600 below the seat support 500, and the sleeve 600 is fixedly connected below the seat support 500; specifically, the sleeve 600 is mounted on the support part 800, mounting grooves (not shown) are formed in the support part 800, the mounting grooves are located on two sides of the cavity 801, the sleeve 600 is mounted in the mounting grooves, and after the sleeve is mounted, the support part 800 is covered by the locking buckle 804.

When the movable lock 300 is engaged with the first lock position 110, the footrest 200 is in the folded-in state, the free end 280 of the footrest 200 is positioned below the drawer rod 400, and when the movable lock 300 is engaged with the second lock position 120, the footrest 200 is in the open state, and the free end 280 of the footrest 200 is positioned in front of the drawer rod 400.

Example 2: this embodiment can refer to fig. 2, and is different from embodiment 1 in that: an accommodating position 510 below the seat support 500 is formed at the hollow 9002, and the accommodating position 510 is matched with the structural shape of the footrest 200 in a folded and folded state; as shown in fig. 4, the width of the footrest 200 is the same as that of the hollow 9002, when the footrest 200 is in a folded state and the drawing rod 400 is completely retracted to the position below the seat support 500, the footrest 200 is fastened to the hollow 9002, i.e., the storage position 510 stores the footrest 200, and the two support columns 900 are located at the left and right sides of the footrest 200, so that the assembly is realized, the lines are smooth, and the integrity is strong.

Example 3: the difference from example 1 is: the rearward approach and resting of the footrest 200 against the lower portion of the seat support 500 refers to: the footrest 200 has an outer surface 291 for supporting the foot of the person and an inner surface 292 disposed opposite the outer surface 291; in the front-rear direction of the seat support 500, a gap of 1-8mm, i.e., not completely contacting, is left between the inner surface 292 and the inclined lower surface of the lower portion of the seat support 500, and preferably a width of the gap is 1-3 mm.

Example 4: the rearward approach and resting of the footrest 200 against the lower portion of the seat support 500 refers to: the seat support 500 is formed by joining an upper plate and a lower plate, the lower plate having a lower portion disposed obliquely with respect to a horizontal plane, the lower portion being formed with an inclined lower surface; the inner surface 292 further has an inner region and a peripheral region, the peripheral region of the inner surface 292 covering and conforming to the inclined lower surface of the lower plate.

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 chair, characterized in that: the multifunctional chair comprises a seat support piece (500), wherein the seat support piece (500) is provided with a lower part which is obliquely arranged relative to a horizontal plane, a pull-out type footrest adjusting mechanism is arranged on the seat support piece (500), the pull-out type footrest adjusting mechanism comprises a pull-out rod (400) which slides back and forth along the seat support piece (500), and a footrest (200) is rotatably arranged at the front end of the pull-out rod (400); in a storage state, the footrest (200) is obliquely turned backwards and downwards relative to the drawing rod (400) and stays at a first preset position, the drawing rod (400) retracts, and the footrest (200) is backwards close to and depends on the lower part of the seat support (500); in the open state, the footrest (200) is rotated from the bottom up and forward to a second preset position for supporting the feet of the human body.

2. A chair according to claim 1, wherein: the fact that the footrest (200) is close to and depends on the lower part of the seat support (500) backwards means that: the footrest (200) has an outer surface (291) for supporting the foot of the human body and an inner surface (292) disposed opposite to the outer surface (291); the inner surface (292) further has an inner region and a peripheral region, at least the peripheral region of the inner surface (292) being contiguous with the lower portion of the seat support (500).

3. A chair according to claim 2, wherein: the seat support (500) is of a frame structure, and the lower structure of the seat support (500) is as follows: the middle part is hollow, the two sides form inclined lower surfaces, and the left side and the right side of the peripheral edge area of the inner surface (292) are attached to the inclined lower surfaces at the two sides of the lower part of the seat supporting piece (500).

4. A chair according to claim 2, wherein: the seat supporting piece (500) is of a frame type structure, the lower portion of the seat supporting piece (500) is of a lower surface structure with a hollow middle and two inclined sides, and the footrest (200) is buckled at the hollow part.

5. A chair according to claim 1, wherein: the fact that the footrest (200) is close to and depends on the lower part of the seat support (500) backwards means that: the footrest (200) has an outer surface (291) for supporting the foot of the human body and an inner surface (292) disposed opposite to the outer surface (291); in the front-rear direction of the seat support member (500), a gap of 1-8mm is left between the inner surface (292) and the inclined lower surface of the lower part of the seat support member (500).

6. A chair according to claim 1, wherein: the fact that the footrest (200) is close to and depends on the lower part of the seat support (500) backwards means that: the seat supporting piece (500) is formed by combining an upper bottom plate and a lower bottom plate, the lower bottom plate is provided with a lower part which is obliquely arranged relative to a horizontal plane, and the lower part is provided with an oblique lower surface; the inner surface (292) further has an inner region and a peripheral region, the peripheral region of the inner surface (292) covers and conforms to the inclined lower surface of the lower base plate.

7. A chair according to claim 1, wherein: the seat supporting piece (500) is of a frame type structure, the seat supporting piece (500) comprises a seat frame (700) and a supporting part (800) located below the seat frame (700), the rear end of the supporting part (800) is connected with the rear end of the seat frame (700), the length of the supporting part (800) is shorter than that of the seat frame (700), two sides of the front end of the supporting part (800) are respectively connected to the left end and the right end of the front part of the seat frame (700) through two obliquely arranged supporting columns (900), the supporting columns (900) form the obliquely arranged lower part of the seat supporting piece (500), and the supporting columns (900) are provided with front surfaces obliquely arranged relative to a horizontal plane; in the stowed state, the peripheral edge region of the inner surface of the footrest (200) covers the front surfaces of the two support columns (900).

8. A chair according to claim 1, wherein: at the first preset position, the included angle between the whole footrest (200) and the horizontal plane is 10-45 degrees.

9. A chair as claimed in claim 2 or 6, wherein: the inner surface (292) of the footrest (200) is uneven, the inner area is in a concave state, and the peripheral area is arranged outside relative to the inner area.

10. A chair according to claim 1, wherein: the two drawing rods (400) are arranged in bilateral symmetry, a support shaft (100) is installed at the front ends of the two drawing rods (400), and the support shaft (100) and the two drawing rods (400) are relatively fixed; the footrest (200) is rotationally connected with the supporting shaft (100).