CN218683238U - Child dining chair with adjustable backrest - Google Patents

Abstract

The utility model discloses a children dining chair of adjustable back sets up the shifter through the articulated department at back and bedplate, and set up on the back and can trigger the trigger structure that the shifter switches into the mode, when the user uses children dining chair, can rotate the back earlier for the bedplate and open and be in the user state, the shifter is in the locking state of restriction back for bedplate pivoted this moment, when the back angle on the bedplate needs to be adjusted, the user can control the trigger structure earlier and make the shifter switch into the mode of adjusting the angle of back, then control the shifter and make the back rotate for the bedplate and adjust the angle of back; when the child seat needs to be folded and stored, the triggering structure is firstly operated to enable the switching mechanism to be switched into a folding and storing mode, and then the switching mechanism is operated to enable the backrest and the seat board to be relatively close to each other to be folded and stored; make children's seat have two kinds of functions simultaneously, the user of being convenient for selects the mode that corresponds according to actual conditions, improves and uses experience.

Description

Child dining chair with adjustable backrest

Technical Field

The utility model relates to the technical field of daily necessities for infants, in particular to a child dining chair with an adjustable backrest.

Background

With the progress and development of society, in order to enable children to develop good habits of sitting and eating from childhood, a dining chair suitable for children to sit when eating is developed, the trouble that parents chase after the children to feed is avoided, the sitting postures of the children can be trained, and the children can be helped to develop the bodies.

Current children's dining chair only is provided with the back usually and accomodates the function for bedplate pivoted folding, does not be provided with the back and can rotate the function in order to adjust the back angle for the bedplate, makes the back can only keep unchangeable one for the bedplate and lean against the angle, and infant sits to bring serious discomfort for the health for a long time with the posture, influences the travelling comfort that infant used.

The utility model discloses it is not enough to solve prior art and research and propose promptly.

SUMMERY OF THE UTILITY MODEL

The technical problem that the child dining chair in the prior art does not have the functions of folding and accommodating and adjusting the angle of the backrest simultaneously is solved.

The utility model provides a technical scheme that its technical problem adopted is:

a child dining chair with an adjustable backrest comprises a backrest and a seat plate which are mutually hinged, wherein a hinge joint of the backrest and the seat plate is provided with a switching mechanism, and the switching mechanism has two modes that the backrest can rotate relative to the seat plate to adjust the angle of the backrest, or the backrest and the seat plate are relatively close to each other to be folded and stored; the backrest is provided with a triggering structure which can trigger the switching mechanism to switch into one mode.

The child dining chair with the adjustable backrest comprises two backrest hinge seats, a seat plate hinge seat and a conversion rotating shaft, wherein the two backrest hinge seats are symmetrically arranged on the backrest along a central axis of the backrest, the seat plate hinge seat is arranged on the seat plate and corresponds to the backrest hinge seats, and the conversion rotating shaft is arranged on the seat plate hinge seat;

an installation cavity is formed in one end face, facing the seat plate hinged seat, of the backrest hinged seat, the conversion rotating shaft is rotatably connected into the installation cavity, a plurality of inserting holes are formed in the conversion rotating shaft at intervals, arc-shaped grooves are formed in the conversion rotating shaft and are positioned at openings of the inserting holes and communicated with the inserting holes respectively, and through holes communicated with the arc-shaped grooves are formed in the backrest hinged seat;

the trigger structure comprises two plugs and trigger assemblies connected with the two plugs, each plug sequentially penetrates through the corresponding through hole and the corresponding arc-shaped groove and is inserted into the corresponding jack, and the trigger assemblies can drive the plugs to exit from the jacks and move into the arc-shaped grooves, so that the plugs can slide along the arc-shaped grooves, the angle of the backrest can be adjusted by rotating relative to the seat plate, or the plugs exit from the arc-shaped grooves and move into the through holes, and the backrest can rotate and be folded relative to the seat plate.

The child dining chair with the adjustable backrest comprises a trigger assembly, a pressing assembly and a pressing limiting assembly, wherein the trigger assembly comprises a tension spring, a pressing operation part and a pressing limiting part, and two plugs are respectively arranged at two ends of the tension spring;

the pressing operation part can jack the tension spring in the direction far away from the seat plate, and the pressing limiting part can limit the jacking distance of the pressing operation part for jacking the tension spring so as to limit the plug in the arc-shaped groove; when the pressing limiting part is in an unlocking state, the pressing operation part can continuously jack up the tension spring to enable the plug to exit from the arc-shaped groove and move into the through hole.

The child dining chair with the adjustable backrest comprises a first pressing button, wherein the first pressing button is movably sleeved on the backrest and can move relative to the backrest;

one end of the first press button is provided with a first clamping part used for clamping with the middle section of the tension spring, two sides of the first press button are provided with long round holes, the backrest is provided with a limiting post corresponding to the long round holes, the limiting post penetrates through the corresponding long round holes, and the limiting post can slide in the long round holes relatively;

the first press button is provided with a limiting groove on one side facing the press limiting part, and the press limiting part can move out or move into the limiting groove relative to the first press button so as to realize limiting action or unlocking action of the first press button.

As described above, the backrest-adjustable child dining chair further comprises two first elastic members respectively disposed at two sides of the first pressing button, each of the first elastic members has one end connected to the tension spring, the other end connected to the backrest, and the tension spring can be tensioned by the first elastic members, so that the two plugs can be maintained in a state inserted into the corresponding insertion holes.

The child dining chair with the adjustable backrest comprises a first pressing button and a limiting plate body, wherein the limiting plate body is connected to the inner side of the backrest in a rotating mode, a limiting protrusion extending towards the direction of a limiting groove is arranged at one end of the limiting plate body, a first elastic piece is arranged at the other end of the limiting plate body, and two ends of the first elastic piece are respectively abutted against the inner side of the backrest and the limiting plate body;

the second press button is movably sleeved on the outer side of the backrest and can move relative to the backrest, the second press button penetrates through the backrest to abut against the limiting plate body, and when the second press button is pressed, the second press button abuts against the limiting plate body to rotate so that the limiting protrusion moves out of the limiting groove.

As above, the child dining chair with the adjustable backrest, the second press button comprises a button cap body and a pressing post arranged on the inner side of the button cap body, the pressing post abuts against the limiting plate body, a third elastic part is sleeved on the outer side of the pressing post, and two ends of the third elastic part respectively abut against the outer side of the backrest and the inner side of the second press button.

The child dining chair with the adjustable backrest further comprises a first foot rest and a second foot rest which are hinged with each other, the second foot rest is hinged with the seat plate, a locking member is arranged at the hinged position of the first foot rest and the second foot rest, and the locking member can limit the relative rotation of the first foot rest, the second foot rest and the seat plate;

the hinged part of the seat board and the backrest is further provided with an unlocking component, the unlocking component penetrates through the conversion rotating shaft to be connected with the locking component, and the unlocking component can enable the locking component to be in an unlocking state, so that the first foot rest, the second foot rest and the seat board can be relatively rotated and folded along the hinged part.

As mentioned above, the child dining chair with the adjustable backrest is characterized in that the seat plate is provided with a second clamping portion capable of mounting a dining table, and the first leg frame is provided with a third clamping portion capable of mounting the dining table.

The utility model has the advantages that:

the utility model discloses a children dining chair of adjustable back sets up the shifter through the articulated department at back and bedplate, and set up on the back and can trigger the trigger structure that the shifter switches into the mode, when the user uses children dining chair, can rotate the back earlier for the bedplate and open and be in the user state, the shifter is in the locking state of restriction back for bedplate pivoted this moment, when the back angle on the bedplate needs to be adjusted, the user can control the trigger structure earlier and make the shifter switch into the mode of adjusting the angle of back, then control the shifter and make the back rotate for the bedplate and adjust the angle of back; when needs are accomodate children's seat is folding, control earlier trigger structure and make the shifter switch into the mode that the folding was accomodate, then control the shifter and make and be close to relatively between back and the bedplate and accomodate in order folding, adopt such design for children's seat can have two kinds of functions simultaneously, and the user of being convenient for selects the mode that corresponds according to actual conditions, improves user's use and experiences.

The present invention will be further described with reference to the accompanying drawings and the detailed description.

Drawings

Fig. 1 is a schematic structural view of a child dining chair with adjustable backrest of the present invention;

fig. 2 is a schematic structural view of the adjustable backrest angle of the children's dining chair of the present invention;

fig. 3 is a schematic structural view of the folding and storage of the child dining chair with adjustable backrest of the present invention;

fig. 4 is a schematic view of the backrest adjustable child dining chair of the present invention showing the hidden first and second leg frames;

fig. 5 is a rear view of the backrest of the present invention;

FIG. 6 isbase:Sub>A cross-sectional view of the back rest atbase:Sub>A fixed angle relative to the seat pan along line A-A of FIG. 5;

fig. 7 is a partial cross-sectional view of the switching mechanism of the present invention in a locked state;

FIG. 8 isbase:Sub>A cross-sectional view of the backrest of FIG. 5 taken along line A-A in an adjusted angular position relative to the seat pan;

fig. 9 is a partial cross-sectional view of the switching mechanism of the present invention in an angular adjustment state;

FIG. 10 isbase:Sub>A cross-sectional view of the back rest of FIG. 5 taken along line A-A inbase:Sub>A collapsible state relative to the seat pan;

fig. 11 is a partial cross-sectional view of a switching mechanism of the present invention in a collapsed state;

fig. 12 is an exploded view of the backrest of the present invention;

fig. 13 is a second exploded view of the backrest of the present invention;

fig. 14 is one of exploded schematic views of an unlocking member and a locking member of the present invention;

fig. 15 is a second exploded view of the unlocking member and the locking member according to the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 3, the child dining chair with adjustable backrest in the present embodiment comprises a backrest 1 and a seat plate 2 hinged to each other, a switching mechanism 3 is provided at the hinge joint of the backrest 1 and the seat plate 2, the switching mechanism 3 has two modes of enabling the backrest 1 to rotate relative to the seat plate 2 to adjust the angle of the backrest 1, or enabling the backrest 1 and the seat plate 2 to approach relatively for folding storage; the backrest 1 is provided with a triggering structure which can trigger the switching mechanism 3 to switch into one mode; the utility model discloses a children dining chair of adjustable back sets up the shifter through the articulated department at back and bedplate, and set up the trigger structure that can trigger the shifter and switch into the mode on the back, when the user uses children dining chair, can rotate the back earlier for the bedplate and open and be in the user state, the shifter is in the lock state of restriction back for bedplate pivoted this moment, when the back angle on the bedplate needs to be adjusted, the user can control the trigger structure earlier and make the shifter switch into the mode of the angle of adjusting the back, then control the shifter and make the back rotate for the bedplate to adjust the angle of back; when needs are accomodate children's seat is folding, control earlier trigger structure and make the shifter switch into the mode that the folding was accomodate, then control the shifter and make and be close to relatively between back and the bedplate and accomodate in order folding, adopt such design for children's seat can have two kinds of functions simultaneously, and the user of being convenient for selects the mode that corresponds according to actual conditions, improves user's use and experiences.

As shown in fig. 4 to 15, the conversion mechanism 3 in the present embodiment includes two backrest hinge seats 31 provided on the backrest 1 and symmetrically provided with respect to the central axis of the backrest 1, a seat plate hinge seat 32 provided on the seat plate 2 corresponding to the backrest hinge seat 31, and a conversion rotation shaft 33 provided on the seat plate hinge seat 32;

an installation cavity 34 is formed in one end face, facing the seat plate hinge seat 32, of the backrest hinge seat 31, the conversion rotating shaft 33 is rotatably connected in the installation cavity 34, a plurality of insertion holes 331 are formed in the conversion rotating shaft 33 at intervals, an arc-shaped groove 332 is further formed in the conversion rotating shaft 33 and is positioned at an opening of the insertion holes 331 and is respectively communicated with the insertion holes 331, and a through hole 311 is formed in the backrest hinge seat 31 and is communicated with the arc-shaped groove 332;

the triggering structure comprises two plugs 41 and a triggering component 42 connected with the two plugs 41, specifically, when the backrest 1 is in a locked state of restricting rotation relative to the base 2, each plug 41 sequentially passes through the corresponding through hole 311 and the arc-shaped groove 332 and is inserted into the insertion hole 331 of one of the plugs;

when the angle of the backrest 1 on the base 2 needs to be adjusted, a user can operate the trigger assembly 42 to drive the plug 41 to exit the jack 331 and move into the arc-shaped groove 332, at this time, the plug 41 can slide along the arc-shaped groove 332, so that the backrest hinge base 31 can rotate relative to the seat plate hinge base 32, the plug 41 plays a role in limiting the rotation amplitude of the backrest in the arc-shaped groove 332, the rotation amplitude of the backrest is the length of the arc-shaped groove 332, and the user can operate the backrest 1 to rotate relative to the seat plate 2 to adjust the angle;

when a user operates the backrest 1 to adjust to a required angle, at this time, the plug 41 is in the arc-shaped groove 332 and above the corresponding jack 331, and the user operates the trigger assembly 42, so that the plug 41 moves into the jack 331 to limit the rotation of the backrest 1 relative to the seat plate 2;

when a user needs to fold and store the child seat, the user can operate the trigger assembly 42 to drive the plug 41 to sequentially exit the jack 331 and the arc-shaped groove 332, so that the plug 41 moves to the through hole 311 on the backrest hinge seat 31, and due to the fact that the limiting effect of the plug 41 in the arc-shaped groove 332 is not provided, the backrest 1 can rotate relative to the seat plate 2 at an unlimited angle, the backrest 1 can be relatively close to the seat plate to achieve the folding and storing functions, and the child seat folding and storing device has the advantages of being simple in structure and convenient to operate.

As shown in fig. 4 to 11, the triggering assembly 42 in this embodiment includes a tension spring 421, a pressing operation portion 422, and a pressing limiting portion 423, wherein the two plugs 41 are respectively disposed at two ends of the tension spring 421;

the pressing operation part 422 can jack the tension spring 421 in a direction away from the seat plate 2, the pressing limiting part 423 can limit the jacking distance of the pressing operation part 422 for jacking the tension spring 421, when the pressing limiting part 423 is in a locked state, a user operates the pressing operation part 422 to jack the tension spring 421, the tension spring 421 can only drive the plug 41 to move into the arc-shaped groove 332, and cannot move to the through hole 311 continuously, so that the backrest 1 and the seat plate 2 can only be in an angle adjusting state and a fixed angle state;

when the pressing limiting portion 423 is controlled to be in the unlocking state, the user can control the pressing operation portion 422 to continuously jack the tension spring 421, so that the tension spring 421 can drive the plug 41 to exit the arc-shaped groove 332 and move into the through hole 311, and the backrest 1 and the seat plate 2 are in the folding state.

As shown in fig. 6 to 13, the pressing operation portion 422 of the present embodiment includes a first pressing button 4221, and the first pressing button 4221 is movably sleeved on the backrest 1 and can move relative to the backrest 1;

one end of the first press button 4221 is provided with a first clamping part 4222 which is used for clamping the middle section of the tension spring 421, and a user can push and press the first press button 4221 in the direction far away from the seat plate 2 to jack up the tension spring 421 clamped on the first clamping part 4222, so that the operation is simple and the use is convenient;

the two sides of the first push button 4221 are provided with oblong holes 4223, the backrest 1 is provided with a limit column 11 corresponding to the oblong holes 4223, the limit column 11 passes through the corresponding oblong hole 4223, and the limit column 11 can slide relatively in the oblong hole 4223, so that the moving distance of the first push button 4221 is the major diameter distance of the oblong hole 4223, the moving distance of the first push button 4221 is limited, and the first push button 4221 is prevented from falling off the backrest 1; meanwhile, the moving direction of the first push button 4221 is limited, so that the first push button 4221 can jack up the tension spring 421 in the direction away from the seat plate 2, and the trigger assembly is ensured to normally operate;

a limit groove 4224 is formed in one side, facing the press limit part 423, of the first press button 4221, when the press limit part 423 is located in the limit groove 4224, the press limit part 423 is matched with the limit groove 4224 to limit the moving distance of the first press button 4221 to be the width size of the limit groove 4224, at this time, the first press button 4221 jacks up the tension spring 421, and the tension spring 421 drives the plug 41 to move only between the jack 331 and the arc-shaped groove 332;

when the pressing limiting part 423 moves out of the limiting groove 4224, the moving distance of the first pressing button 4221 is converted into the long diameter distance of the long circular hole 4223, and at this time, the first pressing button 4221 is unlocked, so that the first pressing button 4221 jacks up the tension spring 421, and the tension spring 421 can drive the plug 41 to exit the arc-shaped groove 332 and move into the through hole 311.

As shown in fig. 6 to 13, the pressing operation portion 422 of the present embodiment further includes two first elastic members 4225 respectively disposed at two sides of the first pressing button 4221, one end of each first elastic member 4225 is connected to the tension spring 421, the other end of each first elastic member 4225 is connected to the backrest 1, and the first elastic members 4225 can tension the tension spring 421 to maintain the two plugs 41 inserted into the corresponding insertion holes 331;

specifically, the first elastic element 4225 is an elastic spring, two ends of the elastic spring are respectively provided with a fixed ring, the two fixed rings are respectively sleeved on a spring body of the tension spring 421 and a corresponding fixed column of the backrest 1, when a user pushes and presses the first push button 4221, the elastic spring is compressed and generates elastic deformation, and when the user removes the force on the first push button 4221, the elastic spring elastically recovers to recover the initial state, simultaneously drives the tension spring 421 to move to the initial position, and drives the first push button to move to the initial position;

specifically, when the backrest 1 is folded relative to the seat plate 2, the first elastic member 4225 is in an elastic deformation state, and tensions the tension spring 421, so that the plug 41 in the insertion hole 331 abuts against the outer side wall of the conversion rotating shaft 33;

a user controls the backrest 1 to rotate and open relative to the seat plate 2, the plug 41 can rotate along the outer side wall of the conversion rotating shaft 33, when the plug moves above the arc-shaped groove 332, the first elastic member 4225 elastically recovers to drive the plug 41 to move into the arc-shaped groove 332 and abut against the bottom of the arc-shaped groove 332, at this time, the backrest 1 continues to rotate, the plug 41 rotates along the bottom of the arc-shaped groove 332 until the plug moves above the corresponding jack 331, the first elastic member 4225 elastically recovers to drive the plug 41 to move into the corresponding jack 331, and at this time, the first elastic member 4225 recovers to an initial state; by adopting the design, when the backrest 1 is rotated and opened relative to the seat plate 2, the backrest 1 and the seat plate 2 can be quickly positioned, and the use by a user is convenient.

As shown in fig. 4 to 13, the pressing limiting portion 423 in the present embodiment includes a second pressing button 4231 and a limiting plate 4232, the limiting plate 4232 is rotatably connected to the inner side of the backrest 1, a limiting protrusion 4233 extending toward the limiting groove 4224 is disposed at one end of the limiting plate 4232, a second elastic member 4234 is disposed at the other end of the limiting plate 4232, and two ends of the second elastic member 4234 respectively abut against the inner side of the backrest 1 and the limiting plate 4232;

the second push button 4231 is movably sleeved on the outer side of the backrest 1 and can move relative to the backrest 1, and the second push button 4231 penetrates through the backrest 1 and abuts against the limiting plate 4232;

specifically, when a user presses the second press button 4231, the second press button 4231 presses against the limiting plate 4232 to rotate, one end of the limiting plate 4232, which is provided with a limiting protrusion 4233, moves in a direction away from the limiting groove 4224, so that the limiting protrusion 4233 moves out of the limiting groove 4224, meanwhile, one end of the limiting plate 4232, which is provided with a second elastic element 4234, moves in a direction close to the limiting groove 4224, and the second elastic element 4234 is compressed and elastically deforms;

when the user removes the force on the second push button 4231, the second elastic member 4234 elastically recovers to drive the one end of the limiting plate 4232 having the limiting protrusion 4233 to move towards the direction close to the limiting groove 4224, so that the limiting protrusion 4233 moves into the limiting groove 4224, and when the first push button 4221 drives the plug 41 to move into the arc-shaped groove 332 through the tension spring 421, the top of the limiting protrusion 4233 abuts against the side wall of the limiting groove 4224, so that the first push button 4221 cannot continuously jack up the tension spring 421.

As shown in fig. 6 to 12, the second push button 4231 in the present embodiment includes a button cap 42311 and a pressing column 42312 disposed inside the button cap 42311, the pressing column 42312 abuts against the limiting plate 4232, a third elastic member 42313 is sleeved outside the pressing column 42312, two ends of the third elastic member 42313 respectively abut against the outside of the backrest 1 and the inside of the second push button 4231, when the second push button 4231 is pressed, the button cap 42311 and the pressing column 42312 move in a direction approaching the backrest 1, the button cap 42311 drives the third elastic member 42313 to compress and elastically deform, and the pressing column 42312 presses the limiting plate 4232 to rotate on the backrest 1;

when the force on the second push button 4231 is removed, the third elastic element 42313 is elastically restored, and drives the button cap 42311 to move in the direction away from the backrest 1, and simultaneously drives the pressing column 42312 to move in the direction away from the backrest 1, so that the force on the limiting plate 4232 is removed, and under the cooperation of the third elastic element 42313 and the second elastic element 4234, the limiting plate 4232 can rapidly move to the initial position.

Preferably, the third elastic member 42313 and the second elastic member 4234 are both elastic springs.

As shown in fig. 1 to 3, 14 and 15, the child dining chair of the embodiment further includes a first foot rest 5 and a second foot rest 6 hinged to each other, the second foot rest 6 is hinged to the seat plate 2, a locking member is disposed at the hinge joint of the first foot rest 5 and the second foot rest 6, and when the backrest 1 and the seat plate 2 are in a locked state of restricting rotation, the locking member is in a locked state of simultaneously restricting the relative rotation of the first foot rest 5, the second foot rest 6 and the seat plate 2, so that the three can not rotate relatively, thereby ensuring the safe use of the child chair;

the articulated department of bedplate 2 and back 1 still is equipped with unlocking member, unlocking member passes conversion pivot 33 and is connected with locking member, and when bedplate 2 and back 1 were in the mode of folding accomodating, unlocking member can trigger locking member and be in the unblock state, makes first foot rest 5, second foot rest 6, bedplate 2 three can follow articulated department relative rotation folding for bedplate 2 carries out the folding in-process with back 1 and can drives first foot rest 5 and second foot rest 6 together folding simultaneously, makes whole folding operation simpler, facilitates the use.

As shown in fig. 14 and 15, the first foot rest 5 of the present embodiment is provided with first foot rest hinge seats 51 symmetrically arranged about the central axis of the backrest 1, the second foot rest 6 is provided with second foot rest hinge seats 61 corresponding to the first foot rest hinge seats 51, and the seat plate 2 is hinged to the second foot rest hinge seats 61 through the seat plate hinge seats 32;

the locking component comprises a first foot rest rotating shaft 52 arranged on the first foot rest hinged seat 51, a backrest rotating shaft 312 arranged on the backrest hinged seat 31 and a linkage locking rotating shaft 7, the first foot rest rotating shaft 52 is hinged with the backrest rotating shaft 312, and the linkage locking rotating shaft 7 is sleeved on the outer side of a rotating shaft structure formed by hinging the first foot rest rotating shaft 52 and the backrest rotating shaft 312;

the linkage locking rotating shaft 7 comprises a first locking rotating shaft 71 with a large diameter and a second locking rotating shaft 72 with a small diameter, a plurality of first clamping teeth 711 are arranged on the outer side wall of one end of the first locking rotating shaft 71 in the circumferential direction, the first clamping teeth 711 are different in size, a plurality of first clamping tooth grooves 511 matched with the first clamping teeth 711 are further arranged in the first foot rest hinge seat 51, a second clamping tooth groove 611 matched with the first clamping tooth grooves 511 is arranged on the second foot rest hinge seat 61, when the first clamping tooth grooves 511 and the second clamping tooth grooves 611 are in butt joint, the first clamping teeth 711 are simultaneously positioned in the first clamping tooth grooves 511 and the second clamping tooth grooves 611, and by adopting the design, the linkage locking rotating shaft 7, the first foot rest hinge seat 51 and the second foot rest hinge seat 61 need to rotate to designed angles relatively, so that the plurality of first clamping teeth 711 can be clamped in the corresponding first clamping tooth grooves 511 and second clamping tooth grooves 611, and the linkage locking rotating shaft 7, the first foot rest hinge seat 51 and the second foot rest hinge seat 61 are in a non-rotating state, namely, the foot rest hinge seat is in a non-rotating state, namely, 5, and is in a non-rotating state relative to the foot rest hinge seat 6 state;

a plurality of second latch teeth 712 are further circumferentially arranged on the outer side wall of the other end of the first locking rotating shaft 71, the width sizes of the second latch teeth 712 are different, and a plurality of third latch grooves 321 matched with the second latch teeth 712 are further arranged on the seat plate hinge seat 32; by adopting the design, the seat plate hinged seat 32 needs to rotate to a designed angle relative to the second foot rest hinged seat 61, and then the plurality of second latch teeth 712 can be latched into the corresponding third latch grooves 321, so that the seat plate hinged seat 32 and the second foot rest hinged seat 61 are in a locked state, that is, the second foot rest 6 is in a locked state relative to the seat plate 2 and cannot rotate; when the backrest 1 and the seat plate 2 are in a locked state for limiting rotation, the child seat can be in an opened use state only by relatively rotating the second foot rest 6, the first foot rest 5 and the seat plate 2 to a designed angle;

as shown in fig. 14 and 15, the unlocking member in this embodiment includes two first locking protrusions 721 symmetrically disposed about the central axis of the second locking rotating shaft 72, and a triggering portion 313 disposed in the backrest hinge seat 31, the triggering portion 313 is located outside the backrest rotating shaft 312, a second locking protrusion 3131 corresponding to the first locking protrusion 721 is disposed on an end of the triggering portion 313, two guiding inclined planes 3132 are disposed between the two second locking protrusions 3131, and the first locking protrusion 721 can move along the guiding inclined planes 3132 to make the second locking protrusion 3131 push up the first locking protrusion 721;

specifically, when a user operates the trigger structure to switch the switching mechanism to the folding storage mode, and then operates the switching mechanism to relatively approach the backrest and the seat plate for folding storage, the backrest rotating shaft 312 on the backrest hinge seat 31 rotates and drives the trigger part 313 to rotate, at this time, the first locking protrusion 721 on the second locking rotating shaft 72 moves along the guide inclined plane 3132, at this time, the guide inclined plane 3132 gradually jacks up the first locking protrusion 721 to drive the linkage locking rotating shaft 7 to move away from the movable backrest hinge seat 31, when the first locking protrusion 721 moves to the end of the second locking protrusion 3131, the second latch 712 completely exits the third latch groove 321, the first latch 711 completely exits the second latch groove 611 and completely moves into the first latch groove 511, so that the second foot rest 6, the first foot rest 5, and the seat plate 2 are in an unlocked state and can relatively rotate;

specifically, a fourth elastic member 53 is arranged between the first foot rest hinge seat 51 and the linkage locking rotating shaft 7, and is capable of maintaining the first latch 711 in a state of being clamped with the first latch groove 511 and the second latch groove 611, and maintaining the second latch 712 in a state of being clamped with the third latch groove 321; when the child seat is in the folded and stored state, the fourth elastic member 53 contracts in the direction of the first leg hinge base 51 under the action of the linkage locking rotating shaft 7, and is elastically deformed;

when the child seat is in the open state, the second leg frame 6, the first leg frame 5, and the seat plate 2 rotate relatively to the designed angle, the second latch 712 is aligned with the third latch groove 321, the first latch 711 is aligned with the second latch groove 611, and the fourth elastic member 53 is elastically restored to the initial state, so as to push the linkage locking rotating shaft 7 to move toward the backrest hinge seat 31, so that the first latch 711 is latched into the second latch groove 611 again, the second latch 712 is latched into the third latch groove 321 again, and the first locking protrusion 721 moves to the end of the triggering portion 313 along the guide inclined plane 3132, so that the second leg frame 6, the first leg frame 5, and the seat plate 2 are in the locked state.

Preferably, the fourth elastic member is an elastic spring.

As shown in fig. 1 to 3, in the present embodiment, the seat plate 2 is provided with the second fastening portion 21 capable of mounting the dining table 8, and the first leg frame 5 is provided with the third fastening portion 54 capable of mounting the dining table 8, so as to facilitate the child to use the dining table, in the present embodiment, when the child seat needs to be folded and stored, the dining table 8 can be detached from the second fastening portion 21 and assembled to the third fastening portion 54, thereby facilitating the storage, and avoiding the loss of the dining table 8.

The utility model discloses a children's seat of adjustable back's theory of operation does: when the child dining table is in a use state, the first elastic piece tensions the tension spring on the first press button, and the plug is positioned in the corresponding jack at the moment so as to limit the backrest to be incapable of rotating relative to the seat plate;

when the angle of the backrest needs to be adjusted, a user pushes and presses the first press button to jack the tension spring, so that the plug is driven to exit from the jack and move into the arc-shaped groove, the limiting protrusion on the limiting plate body is located in the limiting groove, the top of the limiting protrusion abuts against the side wall of the limiting groove, the first press button is limited not to move upwards continuously, and the user can control the backrest to rotate on the seat plate, so that the plug moves in the arc-shaped groove;

when the backrest is adjusted to a required angle, the plug is positioned above the corresponding jack, the user removes the force on the first pressing button, at the moment, the first elastic piece is elastically restored, the tension spring is pulled to move towards the direction close to the backrest hinge seat, so that the plug is clamped into the corresponding jack, and the backrest angle is adjusted on the seat plate;

when needs are accomodate children's seat is folding, the user presses the second and presses the button, so that spacing plate body has the direction removal of spacing bellied one end toward keeping away from spacing recess, spacing arch shifts out spacing recess, bulldoze first push button jack-up extension spring this moment, make the extension spring can drive the plug and withdraw from corresponding jack and arc wall in proper order, move to in the through-hole, because do not have the restriction of plug in the arc wall, make the back can not have the restriction angle rotate for the bedplate, make between the back can and the bedplate relatively be close to in order to realize folding accomodating.

The technical content of the present invention is further described by the embodiments only, so that the reader can understand it more easily, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims (9)

1. A children dining chair with an adjustable backrest is characterized in that: the folding chair comprises a backrest (1) and a seat plate (2) which are hinged with each other, wherein a switching mechanism (3) is arranged at the hinged position of the backrest (1) and the seat plate (2), and the switching mechanism (3) has two modes of enabling the backrest (1) to rotate relative to the seat plate (2) to adjust the angle of the backrest (1) or enabling the backrest (1) and the seat plate (2) to be relatively close to each other to be folded and stored; the backrest (1) is provided with a triggering structure which can trigger the switching mechanism (3) to switch into one mode.

2. A child dining chair with adjustable backrest as claimed in claim 1, wherein: the conversion mechanism (3) comprises two backrest hinged seats (31) which are arranged on the backrest (1) and symmetrically arranged along the central axis of the backrest (1), a seat plate hinged seat (32) which is arranged on the seat plate (2) and corresponds to the backrest hinged seat (31), and a conversion rotating shaft (33) which is arranged on the seat plate hinged seat (32);

an installation cavity (34) is formed in one end face, facing the seat plate hinged seat (32), of the backrest hinged seat (31), the conversion rotating shaft (33) is rotatably connected into the installation cavity (34), a plurality of inserting holes (331) are formed in the conversion rotating shaft (33) in an interval arrangement mode, arc-shaped grooves (332) which are located at openings of the inserting holes (331) and are respectively communicated with the inserting holes (331) are further formed in the conversion rotating shaft (33), and through holes (311) communicated with the arc-shaped grooves (332) are formed in the backrest hinged seat (31);

the triggering structure comprises two plugs (41) and triggering assemblies (42) connected with the two plugs (41), each plug (41) sequentially penetrates through a corresponding through hole (311) and an arc-shaped groove (332) and is inserted into one of the through holes (331), the triggering assemblies (42) can drive the plugs (41) to withdraw from the through holes (331) and move into the arc-shaped grooves (332), and the plugs (41) can slide along the arc-shaped grooves (332) so that the backrest (1) can rotate relative to the seat plate (2) to adjust the angle, or the plugs (41) withdraw from the arc-shaped grooves (332) and move into the through holes (311) so that the backrest (1) can rotate and fold relative to the seat plate (2).

3. A child dining chair with adjustable backrest as claimed in claim 2, wherein: the trigger assembly (42) comprises a tension spring (421), a pressing operation part (422) and a pressing limiting part (423), and the two plugs (41) are respectively arranged at two ends of the tension spring (421);

the pressing operation part (422) can jack the tension spring (421) in the direction away from the seat plate (2), and the pressing limiting part (423) can limit the jacking distance of the pressing operation part (422) for jacking the tension spring (421), so that the plug (41) is limited in the arc-shaped groove (332); when the pressing limiting part (423) is in an unlocking state, the pressing operation part (422) can continuously jack up the tension spring (421), so that the plug (41) exits the arc-shaped groove (332) and moves into the through hole (311).

4. A child dining chair with adjustable backrest as claimed in claim 3, wherein: the pressing operation part (422) comprises a first pressing button (4221), and the first pressing button (4221) is movably sleeved on the backrest (1) and can move relative to the backrest (1);

one end of the first pressing button (4221) is provided with a first clamping portion (4222) used for being clamped with the middle section of the tension spring (421), two sides of the first pressing button (4221) are provided with oblong holes (4223), the backrest (1) is provided with a limiting column (11) corresponding to the oblong holes (4223), the limiting column (11) penetrates through the corresponding oblong holes (4223), and the limiting column (11) can slide relatively in the oblong holes (4223);

one side, facing the pressing limiting portion (423), of the first pressing button (4221) is provided with a limiting groove (4224), and the pressing limiting portion (423) can move out of or into the limiting groove (4224) relative to the first pressing button (4221) so as to achieve limiting action or unlocking action of the first pressing button (4221).

5. A child dining chair with adjustable backrest as claimed in claim 4, wherein: the pressing operation portion (422) further comprises two first elastic pieces (4225) which are respectively arranged on two sides of the first pressing button (4221), one end of each first elastic piece (4225) is connected with the tension spring (421), the other end of each first elastic piece (4225) is connected with the backrest (1), and the tension springs (421) can be tensioned by the first elastic pieces (4225) so that the two plugs (41) can be kept inserted into the corresponding insertion holes (331) in a maintained state.

6. The children's dining chair with adjustable backrest as claimed in claim 4, wherein: the pressing limiting part (423) comprises a second pressing button (4231) and a limiting plate body (4232), the limiting plate body (4232) is rotatably connected to the inner side of the backrest (1), one end of the limiting plate body (4232) is provided with a limiting protrusion (4233) extending towards the direction of a limiting groove (4224), the other end of the limiting plate body (4232) is provided with a second elastic piece (4234), and two ends of the second elastic piece (4234) are respectively abutted against the inner side of the backrest (1) and the limiting plate body (4232);

the second pressing button (4231) is movably sleeved on the outer side of the backrest (1) and can move relative to the backrest (1), the second pressing button (4231) penetrates through the backrest (1) to abut against the limiting plate body (4232), and when the second pressing button (4231) is pressed, the second pressing button (4231) abuts against the limiting plate body (4232) to rotate, so that the limiting protrusion (4233) moves out of the limiting groove (4224).

7. The adjustable back child dining chair according to claim 6, wherein: the second push button (4231) comprises a button cap body (42311) and a pressing column (42312) arranged on the inner side of the button cap body (42311), the pressing column (42312) abuts against the limiting plate body (4232), a third elastic piece (42313) is sleeved on the outer side of the pressing column (42312), and two ends of the third elastic piece (42313) abut against the outer side of the backrest (1) and the inner side of the second push button (4231) respectively.

8. A child dining chair with adjustable backrest as claimed in claim 2, wherein: the child dining chair further comprises a first foot rest (5) and a second foot rest (6) which are hinged with each other, the second foot rest (6) is hinged with the seat plate (2), a locking component is arranged at the hinged position of the first foot rest (5) and the second foot rest (6), and the locking component can limit the relative rotation of the first foot rest (5), the second foot rest (6) and the seat plate (2);

the hinged position of the seat board (2) and the backrest (1) is further provided with an unlocking component, the unlocking component penetrates through the conversion rotating shaft (33) to be connected with the locking component, and the unlocking component can enable the locking component to be in an unlocking state, so that the first foot rest (5), the second foot rest (6) and the seat board (2) can be relatively rotated and folded along the hinged position.

9. The children's dining chair with adjustable backrest as claimed in claim 8, wherein: be equipped with second joint portion (21) that can install dining table (8) on bedplate (2), be equipped with third joint portion (54) that can install dining table (8) on first foot rest (5).

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