CN215190544U - Dining chair joint structure and child dining chair - Google Patents

Abstract

The application discloses a dining chair joint structure, which comprises a rotating shaft, a first rotating part, a second rotating part, a locking part and a driving part, wherein the first rotating part is connected with the rotating shaft in a rotating manner, the second rotating part is connected with the rotating shaft in a rotating manner, the locking part is used for locking the first rotating part and the second rotating part to rotate relatively, the driving part is used for driving the locking part to move, the locking part is arranged between the first rotating part and the second rotating part, the locking part is arranged on the rotating shaft in a sliding manner and can slide along the rotating shaft, and the driving part is connected with the locking part; when the locking piece is locked, the locking piece is connected with the first rotating part and the second rotating part, so that the first rotating part and the second rotating part are relatively fixed; when the lock is unlocked, the driving piece drives the locking piece to slide to be separated from the first rotating part, so that the first rotating part and the second rotating part can rotate relatively. The application also discloses a child dining chair. The unlocking device can be conveniently operated and unlocked.

Description

Dining chair joint structure and child dining chair

Technical Field

The application relates to the technical field of dining chairs, in particular to a dining chair joint structure and a child dining chair.

Background

Child dinning chair is children's instrument of using always of having a meal, and current child dinning chair function is various, though can experience for children's convenient dining like this, but each functional mechanism of child dinning chair also makes child dinning chair occupation space great, carries the transport inconvenient.

Although the prior art has the foldable child dining chair, the unlocking operation is troublesome.

Therefore, it is necessary to design a joint structure of a dining chair and a child dining chair with convenient unlocking operation.

SUMMERY OF THE UTILITY MODEL

The utility model provides a dining chair joint structure and children's dining chair, can conveniently operate the unblock.

The technical scheme of this application provides a dining chair joint structure, including the pivot, with the pivot rotates the first rotation portion of being connected, with the pivot rotates the second rotation portion, be used for locking first rotation portion with the locking piece of second rotation portion relative rotation and be used for driving the driving piece of locking piece action, the locking piece sets up in first rotation portion with between the second rotation portion, and the locking piece slides and sets up in the pivot and can follow the pivot slides, the driving piece with the locking piece is connected;

when the locking piece is locked, the locking piece is connected with the first rotating part and the second rotating part, so that the first rotating part and the second rotating part are relatively fixed;

when the lock is unlocked, the driving piece drives the locking piece to slide to be separated from the first rotating part, so that the first rotating part and the second rotating part can rotate relatively.

Preferably, the locking piece is provided with locking teeth, the first rotating part is provided with a first clamping groove axially arranged along the rotating shaft, and the second rotating part is provided with a second clamping groove axially arranged along the rotating shaft;

when the locking mechanism is locked, the locking teeth are simultaneously clamped into the first clamping groove and the second clamping groove, so that the first rotating part and the second rotating part are relatively fixed;

when the locking piece is unlocked, the driving piece drives the locking piece to slide to the locking tooth to be separated from the first clamping groove, so that the first rotating portion and the second rotating portion can rotate relatively.

Preferably, the plurality of locking teeth are arranged in the circumferential direction of the locking piece at intervals, the first rotating part is provided with a plurality of first clamping grooves matched with the locking teeth, and the second rotating part is provided with a plurality of second clamping grooves matched with the locking teeth;

at least one locking tooth is provided with a bayonet, at least one first clamping groove is internally provided with a convex part, and when the locking tooth is locked, the convex part is clamped in the bayonet.

Preferably, the driving member includes an inner joint and an elastic member, the inner joint is rotatably connected to the rotating shaft, the inner joint is provided with a pushing portion, the locking member is provided with an unlocking inclined surface inclined in the axial direction of the rotating shaft, an end portion of the pushing portion is in contact with the unlocking inclined surface, and the elastic member is installed between the locking member and the second rotating portion;

when the locking piece is locked, the elastic piece pushes the locking piece to slide to the first rotating part, so that the locking tooth is kept to be clamped in the first clamping groove and the second clamping groove simultaneously;

during unlocking, the inner joint is rotated, the pushing portion slides along the unlocking inclined plane and pushes the locking piece to slide to the second rotating portion, and therefore the locking teeth are separated from the first clamping grooves.

Preferably, be equipped with the baffle in the first rotation portion, interior joint sets up one side of baffle, the locking piece sets up the opposite side of baffle, be equipped with the circular arc hole on the baffle, the promotion portion passes the circular arc hole.

Preferably, the driving member further comprises a seat tube fixedly connected with the inner joint and a wrench arranged on the seat tube.

Preferably, a first shaft seat is arranged in the first rotating portion, a second shaft seat is arranged in the second rotating portion, the rotating shaft penetrates through the first shaft seat and the second shaft seat and is rotatably connected with the first shaft seat and the second shaft seat, and the locking piece is sleeved on the second shaft seat and can slide along the axial direction of the rotating shaft.

The utility model also discloses a child dining chair, which comprises a front supporting leg, a rear supporting leg, a backrest bracket and the dining chair joint structure;

the backrest support is fixedly connected with the first rotating part, the front support leg is fixedly connected with the second rotating part, and the rear support leg is rotatably connected with the first rotating part through a rotating mechanism capable of limiting the maximum opening angle of the rear support leg and the front support leg;

when the dining chair is unfolded, the joint structure of the dining chair is locked, the rear supporting leg is unfolded away from the front supporting leg, and the backrest support is unfolded away from the front supporting leg;

when the folding dining chair is stored, the joint structure of the dining chair is unlocked, the rear supporting legs face the front supporting legs to be folded, and the backrest support faces the front supporting legs to be folded.

Preferably, slewing mechanism is including rotating the seat and rotating the end, rotate the seat with first portion fixed connection that rotates, rotate the end with back supporting leg fixed connection, it is equipped with two supports that are separated by the setting to rotate the seat, it sets up two to rotate the end between the support and through the round pin axle with the support rotates and connects, be equipped with spacing terminal surface on the rotation end, work as back supporting leg is kept away from when preceding supporting leg opens to the maximum distance, spacing terminal surface with rotate the seat butt.

Preferably, the locking device further comprises a locking rod, when the locking rod is unfolded, one end of the locking rod is connected with the front supporting leg, the other end of the locking rod is connected with the rear supporting leg, and a triangular structure is formed among the front supporting leg, the rear supporting leg and the locking rod.

After adopting above-mentioned technical scheme, have following beneficial effect:

this application passes through driving piece drive locking piece and slides for the locking piece can slide to and the separation of first rotation portion, thereby makes first rotation portion and second rotation portion can rotate relatively, thereby conveniently unlocks dining chair joint structure. Simultaneously, children's dining chair can realize quick unblock through dining chair joint structure, and then the person of facilitating the use folds children's dining chair and accomodates, improves the convenience of using.

Drawings

The disclosure of the present application will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present application. In the figure:

FIG. 1 is a schematic view of the joint structure of the dining chair in one embodiment of the present invention, when locked;

figure 2 is an exploded view of the joint structure of the dining chair according to one embodiment of the present invention;

figure 3 is a schematic view of the joint structure of the dining chair in one embodiment of the invention, showing the internal structure when locked;

fig. 4 is a schematic structural view of a second rotating part in one embodiment of the present invention;

fig. 5 is a schematic structural diagram of the locking member according to one embodiment of the present invention;

fig. 6 is a schematic view of the child dining chair in its unfolded state according to one embodiment of the present invention;

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

fig. 8 is a schematic structural diagram of a rotating mechanism according to an embodiment of the present invention;

fig. 9 is a schematic view of the overall structure of the child dining chair in one embodiment of the present invention when it is stored.

Reference symbol comparison table:

a rotating shaft 1: a nut 11;

first rotating portion 2: the first clamping groove 21, the convex part 211, the first shaft seat 22, the flange 23, the cover body 24, the partition plate 25 and the arc hole 251;

second rotating portion 3: a second card slot 31, a second shaft base 32;

locking piece 4: locking tooth 41, bayonet 411, unlocking ramp 42;

a driving member 5: inner joint 51, pushing part 511, guide surface 512, third shaft seat 513, sleeve 514, elastic element 52, seat tube 53 and wrench 54;

a locking lever 6;

the frame 7: front support leg 71, rear support leg 72, backrest support 73, connecting rod 74, support rod 75, dining plate 76, pedal 77 and table leg 78;

the rotating mechanism 8: rotating seat 81, support 811, rotation end 82, spacing terminal surface 821.

Detailed Description

Embodiments of the present application are further described below with reference to the accompanying drawings.

It is easily understood that according to the technical solutions of the present application, those skilled in the art can substitute various structures and implementations without changing the spirit of the present application. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present application, and should not be construed as limiting or restricting the technical solutions of the present application in their entirety.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Throughout the description of the present application, it is to be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "coupled" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The foregoing is to be understood as belonging to the specific meanings in the present application as appropriate to the person of ordinary skill in the art.

The first embodiment is as follows:

in some embodiments of the present invention, a dining chair joint structure is disclosed, as shown in fig. 1 and 2, comprising a rotating shaft 1, a first rotating part 2 rotatably connected to the rotating shaft 1, a second rotating part 3 rotatably connected to the rotating shaft 1, a locking member 4 for locking the first rotating part 2 and the second rotating part 3 to rotate relatively, and a driving member 5 for driving the locking member 4 to move, wherein the locking member 4 is disposed between the first rotating part 2 and the second rotating part 3, and the locking member 4 is slidably disposed on the rotating shaft 1 and can slide along the rotating shaft 1, and the driving member 5 is connected to the locking member 4;

as shown in fig. 3, when locked, the locking member 4 connects the first rotating part 2 and the second rotating part 3, so that the first rotating part 2 and the second rotating part 3 are relatively fixed;

when unlocking, the driving member 5 drives the locking member 4 to slide to be separated from the first rotating part 2, and the first rotating part 2 and the second rotating part 3 can rotate relatively.

When the dining chair joint structure is locked, the first rotating part 2 and the second rotating part 3 can not rotate relatively, and when the dining chair is unfolded, the dining chair joint structure can be locked, so that the structure of the dining chair is kept stable. This application unblock is convenient simple, accomodate folding time to the dining chair in needs, the user controls locking piece 4 through driving piece 5 and slides to separating with first rotation portion 2, first rotation portion 2 and second rotation portion 3 can rotate relatively this moment, thereby realize that the folding of dining chair is accomodate, when needs locking, user rethread driving piece 5 drive locking piece 4 slide to connect first rotation portion 2 and second rotation portion 3 can, easy operation is convenient.

In some embodiments of the present invention, as shown in fig. 2 and 5, the locking member 4 is provided with a locking tooth 41, the first rotating portion 2 is provided with a first engaging groove 21 axially disposed along the rotating shaft 1, and as shown in fig. 4, the second rotating portion 3 is provided with a second engaging groove 31 axially disposed along the rotating shaft 1;

when locking, the locking teeth 41 are simultaneously clamped into the first clamping groove 21 and the second clamping groove 31, so that the first rotating part 2 and the second rotating part 3 are relatively fixed;

when unlocking, the driving member 5 drives the locking member 4 to slide until the locking teeth 41 disengage from the first locking grooves 21, so that the first rotating part 2 and the second rotating part 3 can rotate relatively.

When the locking, first draw-in groove 21 and second draw-in groove 31 are located same axis direction, and first draw-in groove 21 and the slide that the axis direction of formation along pivot 1 set up together with second draw-in groove 31, and locking tooth 41 can slide along the slide, and driving piece 5 drives locking piece 4 and slides to locking tooth 41 and block simultaneously in to first draw-in groove 21 and second draw-in groove 31, can make first rotation portion 2 and second rotation portion 3 can not rotate relatively promptly. When needs carried out the unblock, break away from first draw-in groove 21 through locking tooth 41 on the driving piece 5 drive locking piece 4, first rotation portion 2 and second rotation portion 3 can rotate relatively this moment, can realize folding of dining chair and accomodate through rotating first rotation portion 2.

In some embodiments of the present invention, as shown in fig. 3, a first shaft seat 22 is disposed in the first rotating portion 2, a second shaft seat 32 is disposed in the second rotating portion 3, the rotating shaft 1 penetrates through the first shaft seat 22 and the second shaft seat 32 and is rotatably connected to the first shaft seat 22 and the second shaft seat 32, and the locking member 4 is sleeved on the second shaft seat 32 and can slide along the axial direction of the rotating shaft 1.

Further, as shown in fig. 2 and 3, the first rotating portion 2 and the second rotating portion 3 are both of a cylindrical structure, the end portion of the first rotating portion 2 is spliced with the end portion of the second rotating portion 3, a cavity for accommodating the locking member 4 is formed after the first rotating portion 2 is spliced with the second rotating portion 3, the diameters of the first shaft seat 22 and the second shaft seat 32 are equal, the first shaft seat 22 is spliced with the second shaft seat 32, and the locking member 4 is sleeved on the second shaft seat 32 and can slide along the second shaft seat 32. As shown in fig. 3-5, the locking tooth 41 is disposed along the circumferential direction of the locking member 4, the first engaging groove 21 is disposed on the inner wall surface of the first rotating portion 2, the second engaging groove 31 is disposed on the inner wall surface of the second rotating portion 3, wherein the locking tooth 41 is always engaged in the second engaging groove 31, when the locking mechanism is locked, the locking member 4 is driven by the driving member 5 to slide to the first rotating portion 2, a part of the locking tooth 41 slides to be engaged in the first engaging groove 21, and the locking tooth 41 is simultaneously engaged in the first engaging groove 21 and the second engaging groove 31, so that the first rotating portion 2 and the second rotating portion 3 are relatively fixed and cannot rotate relatively. When unlocking, the driving piece 5 drives the locking piece 4 to slide towards the second rotating part 3, and the locking tooth 41 is separated from the first clamping groove 21, so that the first rotating part 2 and the second rotating part 3 can rotate relatively.

Still further, as shown in fig. 3, a circle of flange 23 is arranged on one side of the first rotating portion 2 close to the second rotating portion 3, the outer diameter of the flange 23 is equal to the inner diameter of the side wall of the second rotating portion 3, the flange 23 is inserted into the second rotating portion 3, the outer side wall of the flange 23 is attached to the inner side wall of the second rotating portion 3, accordingly, the splicing attractiveness of the first rotating portion 2 and the second rotating portion 3 is improved, the flange 23 can play a role in guiding when the first rotating portion 2 and the second rotating portion 3 are installed, and alignment and installation are facilitated.

Alternatively, as shown in fig. 3, the axial length of the first shaft seat 22 is smaller than the axial length of the first rotating portion 2, the axial length of the second shaft seat 32 is larger than the axial length of the second rotating portion 3, and the end of the second shaft seat 32 penetrates out from the end of the second rotating portion 3 close to the first rotating portion 2, after the first rotating portion 2 and the second rotating portion 3 are spliced, the second shaft seat 32 is inserted into the first rotating portion 2 and the end of the second shaft seat 32 is spliced with the end of the first shaft seat 22, a first communication hole is formed in the first shaft seat 22 in the axial direction, a second communication hole is formed in the second shaft seat 32 in the axial direction, the first communication hole and the second communication hole have the same diameter and are communicated with each other, and the rotating shaft 1 penetrates through the first communication hole and the second communication hole.

In some embodiments of the present invention, as shown in fig. 5, a plurality of locking teeth 41 are disposed at intervals in the circumferential direction of the locking member 4, the first rotating portion 2 is provided with a plurality of first engaging grooves 21 matching with the locking teeth 41, and the second rotating portion 3 is provided with a plurality of second engaging grooves 31 matching with the locking teeth 41;

at least one locking tooth 41 is provided with a bayonet 411, at least one first slot 21 is internally provided with a convex part 211, and when locking, the convex part 211 is clamped in the bayonet 411.

When locking, when the first rotating portion 2 rotates to the first slot 21 corresponding to the locking tooth 41, that is, only when the first rotating portion 2 rotates to the first slot 21 having the protrusion 211 aligned with the locking tooth 41 having the bayonet 411, the locking member 4 can be correspondingly snapped into the first slot 21 to achieve locking. This allows the user to know the angle to which the first rotating part 2 is rotated to be unfolded.

Further, as shown in fig. 5, the locking member 4 is provided with 4 locking teeth 41, adjacent locking teeth 41 are disposed at an interval of 90 degrees, correspondingly, the first rotating part 2 is provided with 4 first engaging grooves 21, the second rotating part 3 is provided with 4 second engaging grooves 31, wherein, bayonets 411 are arranged on two alternate locking teeth 41, correspondingly, bayonets 411 are arranged on two alternate first slots 21, and the sizes of the two bayonets 411 are different, correspondingly, the convex parts 211 corresponding to the two bayonets 411 are arranged in the two alternate first bayonets 21, the other two locking teeth 41 arranged at intervals are not provided with the bayonets 411, and the two locking teeth 41 have different shapes, when locking, only when the first rotating portion 2 is rotated until the corresponding locking tooth 41 is aligned with the corresponding first engaging groove 21, the locking member 4 can slide toward the first rotating portion 2 and make the locking tooth 41 be engaged into the first engaging groove 21.

Optionally, the locking teeth 41 may be provided with a plurality of locking teeth, and each locking tooth 41 has the same shape and structure, and correspondingly, a plurality of corresponding first engaging grooves 21 are provided in the first rotating portion 2, and a plurality of corresponding second engaging grooves 31 are provided in the second rotating portion 3, so that when the first rotating portion 2 only needs to rotate to a position where the first engaging groove 21 corresponds to the locking tooth 41, the locking teeth 41 can slide into the first engaging groove 21, and the first rotating portion 2 can be fixed at different angles according to the fact that the locking tooth is clamped into different first engaging grooves 21.

In some embodiments of the present invention, as shown in fig. 2 and 3, the driving member 5 includes an inner joint 51 and an elastic member 52, the inner joint 51 is rotatably connected to the rotating shaft 1, the inner joint 51 is provided with a pushing portion 511, as shown in fig. 5, the locking member 4 is provided with an unlocking inclined surface 42 inclined along the axial direction of the rotating shaft 1, an end of the pushing portion 511 is in contact with the unlocking inclined surface 42, and the elastic member 52 is installed between the locking member 4 and the second rotating portion 3;

when locking, the elastic member 52 pushes the locking member 4 to slide towards the first rotating part 2, so that the locking teeth 41 are kept to be simultaneously clamped in the first clamping groove 21 and the second clamping groove 31;

when unlocking, the inner joint 51 is rotated, the pushing part 511 slides along the unlocking inclined plane 42 and pushes the locking piece 4 to slide towards the second rotating part 3, so that the locking tooth 41 is disengaged from the first clamping groove 21.

When the driving member 5 is locked, the elastic member 52 applies a force to the locking member 4 toward the first rotating portion 2 without an external force, so that the locking teeth 41 on the locking member 4 can maintain a state of being engaged into the first engaging groove 21 and the second engaging groove 31. At this time, the end of the pushing portion 511 is positioned at the end of the unlocking slant 42 away from the first rotating portion 2, and the pushing portion 511 does not apply a force to the locking member 4 toward the second rotating portion 3. Specifically, the elastic member 52 is a spring, which is sleeved on the first shaft holder 22 and one end of which is connected to the first rotating portion 2 and the other end of which is connected to the locking member 4.

During unlocking, a user rotates the inner joint 51 to enable the pushing portion 511 to slide along the unlocking inclined surface 42, in the sliding process, the end portion of the pushing portion 511 slides from one end, away from the first rotating portion 2, of the unlocking inclined surface 42 to one end, close to the first rotating portion 2, of the unlocking inclined surface 42, so that the locking piece 4 is pushed to slide towards the second rotating portion 3, the locking tooth 41 on the locking piece 4 is separated from the first clamping groove 21, and the first rotating portion 2 can rotate relative to the second rotating portion 3.

Preferably, as shown in fig. 2, the end of the pushing portion 511 is provided with a guide surface 512, so that the pushing portion 511 is smoother and less prone to jamming when pushing the locking member 4.

In some embodiments of the present invention, as shown in fig. 2, a partition 25 is disposed in the first rotating portion 2, the inner joint 51 is disposed on one side of the partition 25, the locking member 4 is disposed on the other side of the partition 25, the partition 25 is provided with an arc hole 251, and the pushing portion 511 passes through the arc hole 251.

Further, as shown in fig. 2 and 3, a third shaft seat 513 is provided in the inner joint 51, an end of the third shaft seat 513 is attached to the partition 25, and a nut 11 is provided on a side of the inner joint 51 away from the first rotating portion 2, wherein the rotating shaft 1 is a screw, the rotating shaft 1 penetrates through the first shaft seat 22, the second shaft seat 32 and the third shaft seat 513, and an end of the rotating shaft 1 is in threaded connection with the nut 11, so that the first rotating portion 2, the second rotating portion 3 and the inner joint 51 are fixed in the axial direction, and the first rotating portion 2, the second rotating portion 3 and the inner joint 51 can rotate around the rotating shaft 1.

Further, as shown in fig. 3, a cover 24 is provided on the side of the first rotating unit 2 away from the second rotating unit 3, an end of the inner joint 51 is inserted into the cover 24, the end of the inner joint 51 is attached to the surface of the partition 25, and the outer wall surface of the inner joint 51 is attached to the inner wall surface of the cover 24.

In some embodiments of the present invention, as shown in fig. 6, the driving member 5 further includes a seat tube 53 fixedly connected to the inner joint 51 and a wrench 54 disposed on the seat tube 53.

Further, as shown in fig. 2, 3 and 6, the inner joint 51 further includes a sleeve 514, the seat tube 53 is inserted into the sleeve 514 and is fastened through a screw connection, and when unlocking is performed, a user can conveniently rotate the seat tube 53 through the wrench 54 on the seat tube 53, so that the inner joint 51 can be conveniently rotated.

Alternatively, the driving member 5 may also be a linkage rod connected to the locking member 4, the linkage rod penetrates through the end of the first rotating portion 2 or the end of the second rotating portion 3, or penetrates through the wall surface of the second rotating portion 3, and when unlocking or locking is performed, a user pulls the linkage rod externally to drive the locking member 4 to slide.

In this application, when the dining chair joint structure is locked, due to the elastic force of the elastic member 52, the locking member 4 can be kept in a state of being simultaneously clamped in the first clamping groove 21 and the second clamping groove 31, so that the first rotating part 2 and the second rotating part 3 are relatively fixed, and the stability of the locking state can be kept. When the dining chair is unlocked, a user can drive the inner joint 51 to rotate by pressing or lifting the wrench 54 on the seat tube 53, the pushing part 511 on the inner joint 51 pushes the locking piece 4 to slide to the second rotating part 3, so that the locking teeth 41 on the locking piece 4 are separated from the first clamping grooves 21, and at the moment, the first rotating part 2 loses the constraint of the locking piece 4 and can rotate, so that the folding and the storage of the dining chair can be realized. The device is simple and convenient to operate, simple in structure and low in manufacturing cost.

Example two:

the utility model also discloses a child dining chair, which comprises a front supporting leg 71, a rear supporting leg 72, a backrest bracket 73 and the dining chair joint structure disclosed in the first embodiment;

the backrest bracket 73 is fixedly connected with the first rotating part 2, the front support leg 71 is fixedly connected with the second rotating part 3, and the rear support leg 72 is rotatably connected with the first rotating part 2 through a rotating mechanism 8 capable of limiting the maximum opening angle of the rear support leg 72 and the front support leg 71;

when unfolded, the joint structure of the dining chair is locked, the rear support leg 72 is unfolded away from the front support leg 71, and the backrest support 73 is unfolded away from the front support leg 71;

when stowed, the chair joint structure is unlocked and the rear support leg 72 is folded towards the front support leg 71 and the back rest bracket 73 is folded towards the front support leg 71.

Wherein the front support leg 71, the rear support leg 72 and the back support 73 constitute the frame 7.

In some embodiments of the present invention, the rotating mechanism 8 includes a rotating seat 81 and a rotating end 82, the rotating seat 81 is fixedly connected to the first rotating portion 2, the rotating end 82 is fixedly connected to the rear supporting leg 72, the rotating portion is provided with two supports 811 arranged at intervals, the rotating end 82 is arranged between the two supports 811 and rotatably connected to the supports 811 through a pin shaft, the rotating end 82 is provided with a limiting end surface 821, and when the rear supporting leg 72 is far away from the front supporting leg 71 and is opened to the maximum distance, the limiting end surface 821 abuts against the rotating seat 81. When the dining chair is unfolded, the limit end surface 821 is abutted against the rotating seat 81, so that the rear supporting leg 72 is limited not to rotate outwards continuously, and a triangular structure is formed among the front supporting leg 71, the rear supporting leg 72 and the ground, so that the dining chair can be kept stable.

In some embodiments of the present invention, the locking rod 6 is further included, when the locking rod 6 is unfolded, one end of the locking rod 6 is connected to the front supporting leg 71, the other end is connected to the rear supporting leg 72, and a triangular structure is formed between the front supporting leg 71, the rear supporting leg 72 and the locking rod 6. The stability of the front support leg 71 and the rear support leg 72 can be further maintained by the triangular structure, so that the dining chair has better support.

In some embodiments of the present invention, the dining plate 76 and the supporting rod 75 are further included, the dining plate 76 is installed on the backrest bracket 73, one end of the supporting rod 75 is connected to the bottom of the dining plate 76, the other end is connected to the front supporting leg 71, the connecting rod 74 is installed between the supporting rod 75 and the backrest, the seat plate (not shown) is installed on the connecting rod 74, the backrest (not shown) is installed on the backrest bracket 73, and meanwhile, the pedal 77 is installed at the end of the connecting rod 74.

Wherein, back, dinner plate 76, bedplate and footboard 77 all can be dismantled, can dismantle back, dinner plate 76, bedplate and footboard 77 and fold children's dining chair and accomodate when transporting to reduce the occupation of space.

In some embodiments of the present invention, in order to improve the stability of the child dining chair, the table feet 78 are disposed at the bottom of the front supporting leg 71 and the rear supporting leg 72, and the contact area between the front supporting leg 71 and the rear supporting leg 72 and the ground can be increased through the table feet 78, so as to improve the stability of the child dining chair.

What has been described above is merely the principles and preferred embodiments of the present application. It should be noted that, for a person skilled in the art, several other modifications can be made on the basis of the principle of the present application, and these should also be considered as the scope of protection of the present application.

Claims (10)

1. A dining chair joint structure is characterized by comprising a rotating shaft (1), a first rotating part (2) rotatably connected with the rotating shaft (1), a second rotating part (3) rotatably connected with the rotating shaft (1), a locking piece (4) used for locking the first rotating part (2) and the second rotating part (3) to rotate relatively and a driving piece (5) used for driving the locking piece (4) to move, wherein the locking piece (4) is arranged between the first rotating part (2) and the second rotating part (3), the locking piece (4) is arranged on the rotating shaft (1) in a sliding way and can slide along the rotating shaft (1), and the driving piece (5) is connected with the locking piece (4);

when locked, the locking piece (4) is connected with the first rotating part (2) and the second rotating part (3) so that the first rotating part (2) and the second rotating part (3) are relatively fixed;

when the lock is unlocked, the driving piece (5) drives the locking piece (4) to slide to be separated from the first rotating part (2), so that the first rotating part (2) and the second rotating part (3) can rotate relatively.

2. The joint structure of dining chair according to claim 1, wherein said locking piece (4) is provided with locking teeth (41), said first rotating part (2) is provided with a first slot (21) axially arranged along said rotating shaft (1), said second rotating part (3) is provided with a second slot (31) axially arranged along said rotating shaft (1);

when the locking mechanism is locked, the locking teeth (41) are simultaneously clamped into the first clamping groove (21) and the second clamping groove (31) so that the first rotating part (2) and the second rotating part (3) are relatively fixed;

when the lock is unlocked, the driving piece (5) drives the locking piece (4) to slide until the locking teeth (41) are separated from the first clamping grooves (21), so that the first rotating part (2) and the second rotating part (3) can rotate relatively.

3. The dining chair joint structure according to claim 2, wherein a plurality of locking teeth (41) are arranged at intervals on the circumference of the locking piece (4), the first rotating part (2) is provided with a plurality of first slots (21) matched with the locking teeth (41), and the second rotating part (3) is provided with a plurality of second slots (31) matched with the locking teeth (41);

at least one be equipped with bayonet socket (411) on locking tooth (41), at least one be equipped with convex part (211) in first draw-in groove (21), during the locking, convex part (211) card is gone into in bayonet socket (411).

4. The dining chair joint structure according to claim 2, wherein the driving member (5) comprises an inner joint (51) and an elastic member (52), the inner joint (51) is rotatably connected with the rotating shaft (1), the inner joint (51) is provided with a pushing portion (511), the locking member (4) is provided with an unlocking slant (42) inclined along the axial direction of the rotating shaft (1), the end of the pushing portion (511) is in contact with the unlocking slant (42), and the elastic member (52) is installed between the locking member (4) and the second rotating portion (3);

when the locking piece is locked, the elastic piece (52) pushes the locking piece (4) to slide towards the first rotating part (2) so that the locking teeth (41) are kept to be clamped in the first clamping groove (21) and the second clamping groove (31) simultaneously;

when the locking piece is unlocked, the inner joint (51) is rotated, the pushing part (511) slides along the unlocking inclined plane (42) and pushes the locking piece (4) to slide to the second rotating part (3), and therefore the locking teeth (41) are separated from the first clamping grooves (21).

5. The dining chair joint structure according to claim 4, wherein a partition (25) is provided in the first rotating part (2), the inner joint (51) is provided at one side of the partition (25), the locking member (4) is provided at the other side of the partition (25), a circular arc hole (251) is provided in the partition (25), and the pushing part (511) passes through the circular arc hole (251).

6. The dining chair joint structure according to claim 4, wherein the driving member (5) further comprises a seat tube (53) fixedly connected with the inner joint (51) and a wrench (54) arranged on the seat tube (53).

7. The dining chair joint structure according to claim 1, wherein a first shaft seat (22) is arranged in the first rotating part (2), a second shaft seat (32) is arranged in the second rotating part (3), the rotating shaft (1) penetrates through the first shaft seat (22) and the second shaft seat (32) and is rotatably connected with the first shaft seat (22) and the second shaft seat (32), and the locking member (4) is sleeved on the second shaft seat (32) and can slide along the axial direction of the rotating shaft (1).

8. A child's dining chair comprising front support legs (71), rear support legs (72), a back support (73) and a dining chair articulating structure as claimed in any one of claims 1 to 7;

the backrest support (73) is fixedly connected with the first rotating part (2), the front support leg (71) is fixedly connected with the second rotating part (3), and the rear support leg (72) is rotatably connected with the first rotating part (2) through a rotating mechanism (8) capable of limiting the maximum opening angle of the rear support leg (72) and the front support leg (71);

when unfolded, the dining chair joint structure is locked, the rear supporting leg (72) is unfolded away from the front supporting leg (71), and the backrest bracket (73) is unfolded away from the front supporting leg (71);

when the folding dining chair is stored, the joint structure of the dining chair is unlocked, the rear supporting leg (72) faces the front supporting leg (71) to be folded, and the backrest support (73) faces the front supporting leg (71) to be folded.

9. Child dining chair according to claim 8, characterized in that said rotating means (8) comprises a rotating seat (81) and a rotating end (82), said rotating seat (81) being fixedly connected to said first rotating portion (2), said rotating end (82) being fixedly connected to said rear supporting leg (72), said rotating seat (81) being provided with two brackets (811) spaced apart from each other, said rotating end (82) being provided between said two brackets (811) and being rotatably connected to said brackets (811) by means of a pin, said rotating end (82) being provided with a limiting end surface (821), said limiting end surface (821) abutting against said rotating seat (81) when said rear supporting leg (72) is expanded to a maximum distance away from said front supporting leg (71).

10. Child dining chair according to claim 8, further comprising a locking lever (6), wherein when unfolded, said locking lever (6) is connected at one end to said front support leg (71) and at the other end to said rear support leg (72), and wherein a triangular structure is formed between said front support leg (71), said rear support leg (72) and said locking lever (6).

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