CN220384695U - Foot rest mechanism and seat - Google Patents

Abstract

The utility model discloses a leg rest mechanism and a seat, which comprise a support body and a rotating side, wherein a rotating cylinder is arranged at the connection part of the rotating side and the support body; the support body is provided with a cavity, a control rod is inserted into the cavity, and two ends of the control rod penetrate through the support body to be exposed out of the rotary cylinder and an annular cylinder is inserted into the support body; the upper half part of the annular cylinder is provided with a containing hole penetrating the annular cylinder along the radial direction and a ball is arranged in the containing hole, meanwhile, the rotating cylinder is provided with a limit groove matched with the ball, and the end part of the control rod is connected with a limit disc with an inclined plane; the leg rest mechanism has an unlocked and a locked state: the control rod drives the limiting disc to axially move into the cavity, and a ball accommodating space is reserved, so that the balls fall down due to gravity and the part of the balls, which is exposed out of the accommodating hole, is propped against the inclined surface of the limiting disc, and the ball is in an unlocking state at the moment; when the rotating cylinder rotates to align the limit groove with the containing hole, the limit disc is pushed outwards to push the ball into the limit groove by the inclined plane to be clamped between the annular cylinder and the rotating cylinder, and the ball is in a locking state at the moment.

Description

Foot rest mechanism and seat

Technical Field

The utility model belongs to the field of seats, and particularly relates to a leg rest mechanism capable of being stably supported and a seat.

Background

Seating is a piece of furniture commonly used in everyday work and life and generally includes a seat, a backrest, and legs. Early-stage seats do not have a foot rest function, and a user can only place feet on the bottom surface for a long time, and can not relax the legs well when leaning back to rest, so that the needs of people are met, and various seats with the foot rest function are available on the market.

The seat foot rest structure and the seat disclosed in publication number CN21192856, the foot rest structure comprises: the support shaft is provided with a first locking position and a second locking position along the circumferential direction; the foot rest comprises a root end and a free end which are oppositely arranged, a containing cavity for containing the supporting shaft is formed in the root end, and the foot rest 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, and when the footrest rotates to the position that the movable locking piece is engaged 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 unlocking state and rotates around the supporting shaft; a seat with a footrest is foldable under the seat. The support shaft on the rotary footrest drives the movable locking piece on the rotary footrest to move, and the fixing and the rotation of the support shaft are controlled by locking and separating the movable locking piece to the positions where different locking positions are located.

The design of the locking mechanism is complex, firstly, the sector used for positioning needs to be installed on the shaft body of the supporting shaft, corresponding reinforcing pieces are additionally arranged for fixing and reinforcing the connection relation of the sector and the sector, two locking positions are arranged on the sector and used for locking corresponding structures when the sector is opened and completely contained, therefore, the structure of the footrest body is improved to be matched with the two locking positions of the sector and is externally connected with a cover plate for decoration, the footrest body structure needs to be provided with a containing cavity matched with the sector when the sector rotates and is positioned, the sector is locked by using additional movable locking pieces after being rotated to the corresponding position, the reinforcing pieces are additionally arranged for enabling the locking to be more stable, and meanwhile, the cover plate is also correspondingly structurally adjusted for matching the structural changes so as to be better covered on the footrest. There is a need for an improved or added component that is too many and complex, and therefore a more simple structure and sufficiently stable leg rest mechanism.

Disclosure of Invention

In order to solve the technical problems described above, an object of the present utility model is to provide a leg rest mechanism that realizes rotation and fixation of a rotating portion by establishing cooperation of balls and a limit groove at a joint of a leg rest rotating member and a supporting body, the mechanism being simple in structure and having sufficient stability.

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

the leg rest mechanism comprises a leg rest rotating piece and a supporting body, wherein the leg rest rotating piece comprises rotating sides positioned on two sides of the supporting body, one end, close to the supporting body, of the rotating sides is provided with a rotating cylinder, and the rotating cylinder is respectively attached to two ends of the supporting body; a cavity is formed in the support body, a control rod is arranged in the cavity and is inserted into the support body, and the control rod penetrates out of two ends of the support body and is exposed in the rotating cylinder; an annular cylinder is inserted in the rotary cylinder, and the annular cylinder is fixedly connected with the end part of the supporting body; the upper half part of the annular cylinder is provided with a containing hole penetrating the annular cylinder along the radial direction and a ball is arranged in the containing hole, meanwhile, the rotating cylinder is provided with a limit groove matched with the ball, the ball can penetrate out of the containing hole at two ends, the end part of the control rod is connected with a limit disc, the limit disc is positioned in the annular cylinder, and the limit disc is provided with an inclined plane matched with the ball in an extrusion mode; the foot rest mechanism is in an unlocking state and a locking state, when the foot rest mechanism is in the unlocking state, the control rod drives the limiting disc to axially move into the cavity, a ball accommodating space is reserved, the balls move downwards along the accommodating hole under the action of gravity, the part of the balls, which is exposed out of the accommodating hole, abuts against the inclined surface of the limiting disc, and at the moment, the foot rest rotating piece can rotate; when in a locking state, namely when the foot rest rotating piece rotates to enable the limiting groove to be aligned with the containing hole, the limiting disc moves outwards along with the control rod, the ball is partially jacked into the limiting groove from the containing hole by the inclined surface, so that the ball is clamped between the annular cylinder and the rotating cylinder, and at the moment, the foot rest rotating piece and the supporting body are kept relatively fixed. The upper half part of the annular cylinder is provided with the ball, and the ball falls along with gravity, so that the ball is propped against the annular cylinder by using the limit disc with the inclined surface, and when the ball is not matched with the limit groove, the ball falls downwards and is propped against by the limit disc, and at the moment, the leg rest rotating piece can rotate relative to the support body; when the limit groove rotates to the ball position, the limit disc pushes the ball outwards to push the ball into the limit groove, and at the moment, the ball is clamped between the rotary cylinder and the annular cylinder, so that the leg rest rotary piece and the supporting body are circumferentially fixed.

Preferably, the end of the support body is provided with a threaded hole, and the annular cylinder is abutted against the end of the support body and fixedly connected through a screw. The rotating cylinder is not directly connected with the supporting body, but is fixedly connected with the supporting body by driving screws into matched threaded holes on the supporting body through the surface, which is contacted with the supporting body, of the annular cylinder inserted into the rotating cylinder.

Preferably, the end of the annular cylinder, which faces the support body, extends along the axial direction to form a root end part, the root end part is provided with a channel for avoiding the control rod, two ends of the support body are provided with root end slots matched with the root end part in shape, the root end part is circumferentially fixed with the support shaft after the root end part is inserted into the root end slot, and the inner side of the annular cylinder is propped against the end part of the support body and is fixedly connected with the support body. The arrangement of the root end part and the root end slot enables the annular cylinder to be aligned with the support body in the axial direction quickly, and is convenient for aligning holes of the annular cylinder and the support body, which are needed to be driven with screws.

Preferably, the root end is in a special-shaped shape, the root end slots at the two ends of the support body are special-shaped sockets matched with the shape of the root end, through grooves and through holes are formed in the positions, matched with the threaded holes, of the annular cylinder, and the driven screws penetrate through the through grooves and the through holes and the threaded holes to enable the support body to be fixedly connected with the annular cylinder. The root end part and the root end slot are set to be in a flat special-shaped shape which is matched with each other, so that the root end part and the root end slot can be directly fixed in the circumferential direction after the insertion of the root end part and the root end slot is completed, holes which are connected by screws are required to be directly aligned with each other, the screwing of screws is facilitated, and the installation of the balls after the circumferential direction of the annular cylinder is fixed can be more convenient.

Preferably, the part of the control rod exposed in the rotary cylinder is sleeved with a spring, one end of the spring is propped against the periphery of the penetrating position of the control rod in the annular cylinder, and the other end of the spring is propped against the limiting disc; when the control rod drives the limit disc to axially move into the cavity, the spring is compressed to generate reset elastic force, and the inclined surface of the limit disc reversely pushes the ball against the inner wall of the rotary cylinder; when the foot rest rotating piece rotates to the position that the limit groove is aligned with the accommodating hole, the reset elastic force drives the limit disc and the control rod to move reversely and pushes the ball part into the limit groove through the inclined plane. The thrust of limit plate to the ball is provided by the spring, and when the bracket mechanism is in the unblock state, the limit plate moves in to the cavity and the ball falls, and the spring is compressed by the limit plate and produces outside thrust this moment, and when the spacing groove on the rotary cylinder rotates to the matching with the ball, the spring outwards promotes the inclined plane that the limit plate made the limit plate push the ball into spacing inslot, and bracket mechanism switches to the locking state by the unblock state this moment.

Preferably, the center of the limiting disc is provided with a middle hole, the control rod is a hollow rod, two ends of the control rod are provided with screw holes, the limiting disc is propped against the end part of the control rod, and the middle hole is aligned with the screw holes and screwed into the screw holes to fixedly connect the supporting shaft and the limiting disc. The limiting disc is screwed into the end part of the hollow control rod of the screw at the center so as to fixedly connect the two.

Preferably, the locking state is divided into a leg rest opening state and a leg rest storage state, a plurality of limit grooves are distributed on the inner wall of the rotary cylinder along the circumferential direction, and the corresponding limit grooves are matched with the balls when the leg rest is in the leg rest opening state or the leg rest storage state. When in a locking state, all the balls are propped into the matched limiting grooves by the limiting disc, and when in an unlocking state, the balls are not in the limiting grooves and are in rolling friction with the inner wall of the rotating cylinder.

Preferably, two containing holes and balls are respectively arranged at the upper half part of the annular cylinder, three limit grooves matched with the balls are arranged on the inner wall of the rotary cylinder, and when the rotary cylinder and the annular cylinder are relatively fixed, two balls are engaged with two adjacent limit grooves. The two balls are arranged on the annular cylinder, and the locking state is divided into a use state and a storage state, so that the three limit grooves are arranged in total and matched with the balls, and the balls are clamped with two adjacent balls in the locking state.

Preferably, the support body is provided with a control part, and the control rod is arranged at the left side and the right side of the control part; the control portion includes base and button key, and the base is connected fixedly with the supporter, and the base is equipped with the slide along supporter axial direction, is equipped with the connecting seat in the slide, and the connecting seat includes the spliced pole of being connected with the control lever and with button key complex cooperation portion, the button key passes through the inclined plane cooperation with cooperation portion, and button key action drives cooperation portion and control lever and removes along the slide. The control part is arranged in the support body and used for controlling the axial movement of the limiting disc, the control part is fixedly connected to the support body through the base and divides the control rod into a left part and a right part, and the control part is matched with the inclined planes of the matching parts through the keys and the keys so that the control rods at the left side and the right side can drive the limiting disc to axially move.

Preferably, the connecting column is hollow and is provided with a bolt opening along the radial direction, a radial opening is formed in the position, matched with the bolt opening, of the control rod, and the control rod is connected with the connecting seat by inserting a bolt. The connecting column on the connecting seat for connecting with the control rod is a hollow rod piece, and the control rod is inserted into the connecting column and then is driven into a radial bolt to fix the connecting column and the control rod.

Preferably, the middle part of the support body is provided with a button key, the base is provided with a plurality of connecting holes along the whole body, the support body is provided with connecting threaded holes matched with the connecting holes, and after the base is connected with the support body through screws, the upper end of the button key penetrates out of the button groove. The control part is fixed on the support body through setting up the connecting hole on its base and through connecting hole and support body threaded connection, and button groove on the support body is worn out to the button after the connection is used by the user.

Preferably, the button key is symmetrically provided with two control blocks, the matching part is provided with a trapezoid groove, and the joint surface and the inclined surface of the control block and the trapezoid groove. The trapezoid control block on the button key is matched with the inclined plane of the trapezoid groove on the matching part, so that the button key moves to drive the connecting seat to move axially inwards when the button key is pressed down.

Preferably, a plurality of sliding-assisting grooves are formed in the surface, which is attached to the supporting body, of the rotating cylinder, sliding-assisting balls are arranged at positions, matched with the sliding-assisting grooves, on the supporting body, and when the rotating cylinder rotates, the sliding-assisting balls are switched in different sliding-assisting grooves. In order to reduce friction between the rotating cylinder and the supporting body, the sliding-assisting ball and the sliding-assisting groove are arranged on the contact surface of the rotating cylinder and the supporting body, so that the sliding-assisting ball and the sliding-assisting groove can conveniently rotate.

A seat comprises a seat, a pull rod and the leg rest mechanism, wherein the pull rod is symmetrically arranged on the left side and the right side of a seat base, and a support body is connected to the front end of the pull rod. The foot rest mechanism is arranged on the seat in a drawing mode, so that the foot rest mechanism can be stored at the lower side of the seat when not used, the whole foot rest mechanism is more attractive, and the foot rest mechanism is directly drawn out when needed, so that the foot rest mechanism is convenient to use.

The principle and beneficial effects of the utility model adopting the technical scheme are as follows:

firstly, placing a control rod into a cavity of a support body after aligning the rotating cylinder and the support body, enabling two ends of the control rod to penetrate through two sides of the support body and expose in the rotating cylinder, axially fixing the rotating cylinder and enabling the rotating cylinder to circumferentially rotate around the support body, enabling the annular cylinder to be connected with a special-shaped root end socket of the support body through the special-shaped root end socket of the annular cylinder and then connected with the annular cylinder through screws, and enabling the outer wall of the annular cylinder to be attached to the inner wall of the rotating cylinder; the upper half part of the annular cylinder is provided with a containing hole and is internally provided with a ball, the ball can fall down due to gravity, so that a limit disc with an inclined plane is arranged at the ball to support the ball, the position of the ball in the radial direction of the annular cylinder is changed by extruding the ball through the inclined plane by the axial movement of the limit disc along the supporting shaft, and meanwhile, a limit groove matched with the ball is arranged on the rotating cylinder, and the relationship between the ball and the limit groove enables the foot rest mechanism to have unlocking and locking states; the control rod drives the limiting disc to axially move into the cavity, the ball falls from the accommodating hole and is propped against the inclined surface of the limiting disc, at the moment, the leg rest mechanism is in an unlocking state, and the rotating cylinder can rotate; when the rotating cylinder rotates to enable the limit groove to rotate to the position where the ball is located, the push-pull limit disc pushes the ball into the limit groove, at the moment, one part of the ball is in the limit groove of the rotating cylinder, the other part of the ball is in the accommodating hole of the annular cylinder, and the limit disc limits the movement of the ball, and the rotating cylinder and the annular cylinder are relatively fixed, so that the leg rest mechanism is in a locking state.

Drawings

FIG. 1 is an exploded view of the leg rest mechanism in use;

FIG. 2 is a perspective view of the leg rest mechanism in use;

FIG. 3 is a perspective view of a control lever;

FIG. 4 is a cross-sectional view of the control lever;

FIG. 5 is a schematic view of the connection of the support body and the rotating portion;

FIG. 6 is a schematic view of the installation of a control lever;

FIG. 7 is a schematic illustration of the connection of the annular cartridge and the fittings contained therein;

FIG. 8 is a cross-sectional view of the leg rest mechanism in use;

FIG. 9 is an enlarged view of A in FIG. 8;

FIG. 10 is a perspective view of the leg rest mechanism as it rotates;

FIG. 11 is a cross-sectional view of the leg rest mechanism as it rotates;

FIG. 12 is an enlarged view of B in FIG. 10;

fig. 13 is a perspective view of the leg rest mechanism when stowed;

FIG. 14 is a cross-sectional view of the leg rest mechanism at the time of storage

FIG. 15 is an enlarged view of C in FIG. 13;

the reference numerals are as follows: 100-foot rest rotating piece, 101-rotating side, 102-rotating cylinder, 103-limit groove, 104-sliding aid groove, 105-cross arm, 106-groove, 200-supporting body, 201-cavity, 202-connecting threaded hole, 203-button groove, 204-sliding aid ball, 205-root end slot, 300-control part, 301-control rod, 302-threaded hole, 303-base, 304-button key, 305-connecting hole, 306-sliding groove, 307-connecting post, 308-bolt opening, 309-radial opening, 310-matching part, 311-trapezoid groove, 312-control block, 313-connecting seat, 400-annular cylinder, 401-containing hole, 402-ball, 403-root end, 404-channel, 405-through hole, 406-through groove, 500-limit disc, 501-inclined plane, 502-spring, 503-middle hole, 504-end cover, 600-draw rod.

Detailed Description

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.

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

as shown in fig. 5, the present embodiment firstly provides a leg rest mechanism, which includes a leg rest rotating member 100 and a supporting body 200, wherein the leg rest rotating member 100 is required to be used for mounting a leg rest, the leg rest rotating member 100 in the present embodiment includes rod-shaped rotating sides 101 located at two sides of the supporting body 200, the rotating sides 101 at two sides are connected through a cross arm 105, so that the leg rest rotating member 100 is relatively fixed as a whole, and a groove 106 is formed on the outward side edges of the rotating sides 101 at two sides, and the groove 106 is used for mounting and fixing a subsequent leg rest; and a rotary cylinder 102 attached to both ends of the support 200 is provided on the rotary side 101. Since some necessary components need to be set up to achieve the corresponding purpose, as shown in fig. 6, a cavity 201 is opened on the support body 200, and a control rod 301 is set up in the cavity 201, in order to accommodate the control rod 301, the support body 200 is hollow and long cylindrical, and in addition, for the overall aesthetic consideration, an opening of the cavity 201 is set up on the bottom side of the support body 200, so that the opening of the cavity 201 is not observed in normal use; the control rod 301 is inserted into the supporting body 200, and two ends of the control rod penetrate out of two ends of the supporting body 200, and two parts of two ends of the rod are exposed out of the rotary cylinder 102; after the control rod 301 is installed, the annular cylinder 400 provided with a channel 404 for the control rod 301 to pass through and the end of the control rod 301 inserted into the rotary cylinder 102 are attached to the outer wall of the annular cylinder 400 and the inner wall of the rotary cylinder 102 after the insertion is completed, the end face of the annular cylinder 400 is attached to the end face of the support body 200, and the two end faces are fixedly connected by driving screws.

In order to switch the locking and rotating states of the leg rest mechanism, as shown in fig. 7, a receiving hole 401 penetrating the leg rest mechanism in the radial direction is formed in the upper half part of the annular cylinder 400, a ball 402 is placed in the receiving hole, the ball 402 is arranged in the upper half part of the annular cylinder for allowing the ball 402 to fall along with gravity, and a limit groove 103 capable of being matched with the ball 402 is formed in the rotating cylinder 102; in order to prevent the balls 402 from falling out, a limit plate 500 with a bevel 501 is arranged at a corresponding position, namely at the end face of the control rod 301 in the annular cylinder 400, and the limit plate 500 can move axially along the control rod 301 in the annular cylinder 400 so that the balls 402 can fall out of a part of the containing holes 401 and be abutted by the limit plate 500, or the balls 402 are completely pushed into the limit grooves 103, and the position states of the two balls 402 determine whether the footrest mechanism is in an unlocking state or a locking state.

Fig. 10-12 are schematic diagrams showing an unlocked state, the control rod 301 is pulled to drive the limit disc 500 to move axially into the cavity 201, the inclined surface 501 of the limit disc 500 leaves a space for accommodating the balls 402, and the balls 402 fall off the limit groove 103 under the action of gravity, so that the leg rest rotating member 100 can rotate; fig. 13-15 are schematic diagrams showing the locked state, when the limit groove 103 rotates to the position where the ball 402 is located, the limit disc 500 pushes the ball 402 into the limit groove through the inclined surface 501, and at this time, the ball 402 is clamped between the annular cylinder 400 and the rotary cylinder 102, and the leg rest rotary member 100 and the supporting body 200 are relatively fixed.

The general composition of this leg rest mechanism is described above, and the following detailed description is made:

in order to stably connect the annular cylinder 400 and the rotary cylinder 102 to the support body 2, first, as shown in fig. 1, two connection screw holes 202 are formed on end surfaces of both ends of the support body 200, and simultaneously, a through hole 405 through which a screw passes and a through groove 406 for avoiding the screw are formed on the inner wall of the annular cylinder 102, and after the mounting steps shown in fig. 5 and 6 are completed, the annular cylinder 400 is inserted into the rotary cylinder 102 and is fixedly connected with the support body by the screw.

However, considering that if the annular cylinder 400 and the support 200 are directly connected by screws, it may be somewhat laborious to align the end surfaces and the connection holes of the two, as shown in fig. 1, a root end 403 extends on the surface of the annular cylinder 400 contacting the support 200, a channel 404 for avoiding the control rod 301 is formed on the root end 403, and root end slots 205 matching the root end 403 are formed on both ends of the support 200, and after the rotary cylinder 102 is attached to both sides of the support 200 and the control rod 301 is mounted, the root end 403 is inserted into the root end slots 205 to completely attach the annular cylinder 400 and the rotary cylinder 102; in order to make the connection between the annular tube 400 and the support 200 easier, the root end 403 and the root end slot 205 are configured to have a shape matching the shape of the special shape in the present embodiment, and the special shape is flat, so that the rotary tube 400 is fixed to the circumference of the support 200 after the insertion is completed and the through hole 405 and the connection threaded hole 202 are directly aligned, without manual alignment, so that the screw is screwed in conveniently.

As shown in fig. 3 and 7, before the limiting disc 500 is connected to the control lever 301, a spring 502 needs to be set up in advance at a portion of the control lever 301 located on the rotary barrel 102, so that when the limiting disc 500 is pulled inwards along the axial direction of the control lever 301 and the leg rest mechanism is in the unlocking state as shown in fig. 10-12, the ball 402 can be propped against by the elastic force of the spring 502, when the rotary barrel 102 rotates to enable the limiting groove 103 to rotate to the position of the ball 402, the limiting disc 500 moves outwards by the elastic force of the reset of the spring 502 and pushes the ball 402 into the limiting groove 103 through the inclined surface 501, and the leg rest mechanism can be switched from the unlocking state to the locking state, wherein the locking state has the use state as shown in fig. 2, 8 and 9 and the storage state as shown in fig. 13-15.

As shown in fig. 7, in the method for mounting the limit plate 500 and the lever 301, a center hole 503 is formed in the center of the limit plate 500, the lever 301 is a center hole lever member, screw holes 302 are formed at both ends, the limit plate 500 is abutted against the end surface of the lever 301 to align the center hole 503 with the screw holes, and screws are screwed in to fix the center hole 503 and the screw holes.

The leg rest mechanism needs to be in a locking state when being completely stored and used, so a plurality of limit grooves 103 are required to be distributed in the circumferential direction inside the rotary cylinder 102, as shown in the sectional views of fig. 9 and 15 when being stored, and in the two states, the balls 402 are respectively matched with the corresponding limit grooves 103; in order to meet the use requirement of the limit grooves 103 during storage and use, two balls 402 and the accommodating holes 401 are respectively arranged in the embodiment, and three limit grooves 103 are arranged on the rotating cylinder 102, and because the two balls 402 are fixed in position, and the two balls 402 are matched with the two limit grooves 103 during storage and use, the three limit grooves 103 are distributed on the rotating cylinder 102 in an isosceles triangle.

In order to facilitate the user to operate and control the unlocking and locking of the leg rest mechanism, a control part 300 is provided on the support body 200, the control part 300 is structured as shown in fig. 3 and 4, a control lever 301 is provided separately on the left and right sides of the control part 300, the control part 300 comprises a base 303 for connecting with the support body 200 and a button key 304 for user interaction, the base is provided with a plurality of connecting holes 305 along the whole body, meanwhile, a connecting threaded hole 202 matching with the connecting holes 305 is provided in the cavity 201 of the support body 200, and after the base 303 and the support body 200 are connected by screws, the upper end of the button key 304 passes through a button groove 203 matching with the button key 304 on the support body 200.

The base 303 of the control part 300 is provided with a slide way 306 along the axial direction of the control rod 301 for the control rod 301 to axially move, in the aspect of connection between the control rod 301 and the base 303, a connecting seat 313 is firstly arranged in the slide way 306, the connecting seat 313 comprises a connecting column 307 connected with the control rod 301, the connecting column 307 is hollow, the shape of the inner wall of the connecting column 307 is matched with that of the control rod 301, a bolt opening 308 is formed in the radial direction, a radial opening 309 is also formed in a place where the connecting rod 301 is inserted into the bolt opening 308, and the connecting rod 301 is inserted into the connecting column 307 and then connected with the connecting column by inserting a bolt.

The connecting seat 306 further comprises a matching part 310 matched with the button key 304, a trapezoid groove 311 is formed in the matching part 310, meanwhile, a control block 312 matched with the trapezoid groove 311 is arranged on the button key 304, the joint part of the control block 312 and the trapezoid groove 311 is an inclined plane, a user presses the button key 304, and the control block 312 moves downwards and drives the two trapezoid grooves 311 to move inwards through the inclined plane, so that the control rod 301 and the limiting disc 500 can be driven to move inwards.

Considering that the rotation friction force of the rotation cylinder 102 and the support body 200 directly contacts is large, as shown in fig. 5, two sliding-assisting balls 204 are inserted into the portion of the support body 200, which is in contact with the rotation cylinder 102, before the rotation cylinder 102 is aligned, and meanwhile, a plurality of sliding-assisting grooves 104 are formed on the circumference position of the rotation cylinder 102 corresponding to the sliding-assisting balls, so that when the rotation cylinder 102 rotates, the sliding-assisting balls 204 are switched in different sliding-assisting grooves 104, friction between the rotation cylinder 102 and the support body 200 is reduced, the rotation is more labor-saving, and an end cover 504 is covered at the end face of the annular cylinder 400 after all components are connected for the whole aesthetic consideration.

The above-mentioned leg rest mechanism can finally be installed on the seat through pull rod 600, generally speaking, pull rod 600 symmetry sets up in the left and right sides of seat, and supporter 200 both ends and the front end of pull rod 600 in the above-mentioned leg rest mechanism are connected, and the leg rest mechanism under the pull rod drive storage state withdraws the seat downside when accomodating, will take out the leg rest mechanism during the use and push button key 304 rotates the locking state when using with leg rest rotor 100 and can begin to use.

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 (14)

1. A leg rest mechanism, characterized in that: the leg rest rotating piece comprises rotating sides positioned on two sides of the supporting body, one end of the rotating side, which is close to the supporting body, is provided with a rotating cylinder, and the rotating cylinder is respectively attached to two ends of the supporting body; a cavity is formed in the support body, a control rod is arranged in the cavity and is inserted into the support body, and the control rod penetrates out of two ends of the support body and is exposed in the rotating cylinder; an annular cylinder is inserted in the rotary cylinder, and the annular cylinder is fixedly connected with the end part of the supporting body; the upper half part of the annular cylinder is provided with a containing hole penetrating the annular cylinder along the radial direction and a ball is arranged in the containing hole, meanwhile, the rotating cylinder is provided with a limit groove matched with the ball, the ball can penetrate out of the containing hole at two ends, the end part of the control rod is connected with a limit disc, the limit disc is positioned in the annular cylinder, and the limit disc is provided with an inclined plane matched with the ball in an extrusion mode; the foot rest mechanism is in an unlocking state and a locking state, when the foot rest mechanism is in the unlocking state, the control rod drives the limiting disc to axially move into the cavity, a ball accommodating space is reserved, the balls move downwards along the accommodating hole under the action of gravity, the part of the balls, which is exposed out of the accommodating hole, abuts against the inclined surface of the limiting disc, and at the moment, the foot rest rotating piece can rotate; when in a locking state, namely when the foot rest rotating piece rotates to enable the limiting groove to be aligned with the containing hole, the limiting disc moves outwards along with the control rod, the ball is partially jacked into the limiting groove from the containing hole by the inclined surface, so that the ball is clamped between the annular cylinder and the rotating cylinder, and at the moment, the foot rest rotating piece and the supporting body are kept relatively fixed.

2. A leg rest mechanism according to claim 1, wherein: the end part of the supporting body is provided with a threaded hole, and the annular cylinder is abutted against the end part of the supporting body and is fixedly connected through screws.

3. A leg rest mechanism according to claim 1, wherein: the end of the annular cylinder, which faces the support body, is axially extended with a root end part, the root end part is provided with a channel for avoiding the control rod, two ends of the support body are provided with root end slots matched with the root end part in shape, the root end part is circumferentially fixed with the support shaft after the root end part is inserted into the root end slot, and the inner side of the annular cylinder is propped against the end part of the support body and is fixedly connected with the support body.

4. A leg rest mechanism according to claim 3, wherein: the root end is in a special-shaped shape, the root end slots at the two ends of the support body are special-shaped sockets matched with the shape of the root end, through grooves and through holes are formed in the positions, matched with the threaded holes, of the annular cylinder, and the driven screws penetrate through the through grooves and the through holes and the threaded holes to enable the support body to be fixedly connected with the annular cylinder.

5. A leg rest mechanism according to claim 1, wherein: the part of the control rod exposed out of the rotary cylinder is sleeved with a spring, one end of the spring is propped against the periphery of the penetrating position of the control rod in the annular cylinder, and the other end of the spring is propped against the limiting disc; when the control rod drives the limit disc to axially move into the cavity, the spring is compressed to generate reset elastic force, and the inclined surface of the limit disc reversely pushes the ball against the inner wall of the rotary cylinder; when the foot rest rotating piece rotates to the position that the limit groove is aligned with the accommodating hole, the reset elastic force drives the limit disc and the control rod to move reversely and pushes the ball part into the limit groove through the inclined plane.

6. A leg rest mechanism according to claim 1, wherein: the center of the limiting disc is provided with a middle hole, the control rod is a hollow rod, two ends of the control rod are provided with screw holes, the limiting disc is propped against the end part of the control rod, and the middle hole is aligned with the screw holes and screwed into the screw holes to fixedly connect the control rod and the limiting disc.

7. A leg rest mechanism according to claim 1, wherein: the locking state is divided into a foot rest opening state and a foot rest storage state, a plurality of limit grooves are distributed on the inner wall of the rotary cylinder along the circumferential direction, and the corresponding limit grooves are matched with the balls when the foot rest is in the foot rest opening state or the foot rest storage state.

8. A leg rest mechanism according to claim 7, wherein: two containing holes and balls are respectively arranged at the upper half part of the annular cylinder, three limit grooves matched with the balls are arranged on the inner wall of the rotary cylinder, and when the rotary cylinder is fixed relative to the annular cylinder, two balls are clamped with two adjacent limit grooves.

9. A leg rest mechanism according to claim 1, wherein: the control rod is arranged on the left side and the right side of the control part respectively; the control portion includes base and button key, and the base is connected fixedly with the supporter, and the base is equipped with the slide along control rod axial direction, is equipped with the connecting seat in the slide, and the connecting seat includes the spliced pole of being connected with the control rod and with button key complex cooperation portion, the button key passes through the inclined plane cooperation with cooperation portion, button key action drive cooperation portion and control rod along the slide removal.

10. A leg rest mechanism according to claim 9, wherein: the connecting column is hollow and is provided with a bolt opening along the radial direction, a radial opening is formed in the position, matched with the bolt opening, of the control rod, and the control rod is connected with the connecting seat by inserting a bolt.

11. A leg rest mechanism according to claim 9, wherein: the middle part of the supporting body is provided with a button key, the base is provided with a plurality of connecting holes along the whole body, the supporting body is provided with a connecting threaded hole matched with the connecting holes, and after the base is connected with the supporting body through screws, the upper end of the button key penetrates out of the button groove.

12. A leg rest mechanism according to claim 9, wherein: two control blocks are symmetrically arranged on the button key, a trapezoid groove is formed in the matching part, and the joint surface and the inclined surface of the control block and the trapezoid groove are provided with a groove.

13. A leg rest mechanism according to claim 1, wherein: a plurality of sliding-assisting grooves are formed in the surface, which is attached to the supporting body, of the rotating cylinder, sliding-assisting balls are arranged at positions, matched with the sliding-assisting grooves, on the supporting body, and when the rotating cylinder rotates, the sliding-assisting balls are switched in different sliding-assisting grooves.

14. A seat, which is characterized by comprising a seat, a drawing rod and the leg rest mechanism as claimed in claim 1, wherein the drawing rod is symmetrically arranged at the left side and the right side of the seat, and a support body is connected to the front end of the drawing rod.