Child chair and backrest connecting structure thereof

Abstract

The present disclosure relates to a backrest connecting structure (300) and a child chair (100) having the backrest connecting structure (300). The child chair (100) includes a seat body (1) and a backrest assembly (2). The backrest connecting structure (300) is configured to detachably connect the backrest assembly (2) to the seat body (1). The backrest connecting structure (300) includes a backrest disassembly mechanism (3). The backrest disassembly mechanism (3) includes an engagement member (31) and a disassembly operating member (32). The engagement member (31) is movably disposed on the backrest assembly (2) and has a first engagement end (311). The disassembly operating member (32) is rotatably connected to the backrest assembly (2) and drivingly connected to the engagement member (31). The disassembly operating member (32) is capable of being operated to rotate to cause the engagement member (31) to move between a first backrest locking position and a first backrest unlocking position. The seat body (1) is provided with an engagement portion (13). When the engagement member (31) is at the first backrest locking position, the first engagement end (311) is capable of being engaged with the engagement portion (13) to connect the backrest assembly (2) to the seat body (1). When the engagement member (31) is at the first backrest unlocking position, the first engagement end is disengaged from the engagement portion (13) to allow the backrest assembly (2) to be detached from the seat body (1).

Description

CHILD CHAIRAND BACKREST CONNECTING STRUCTURE THEREOF TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of children's products, and in particular to a child chair with multiple usage modes and a backrest connecting structure thereof.BACKGROUND

[0002] Child dining chairs offer convenience for children to dine alongside adults at the same table, enhancing their sense of inclusion during meals. However, current child dining chairs are typically limited in functionality, lacking the ability to effectively meet the diverse age-related needs of children or adapt to various dining scenarios. Existing child high chairs often have a short service life and a low utilization rate.SUMMARY

[0003] To solve the above problems, the present disclosure provides a backrest connecting structure through which a backrest that can be easily removed and a child chair having the backrest connecting structure.

[0004] According to an aspect of the present disclosure, a backrest connecting structure for a child chair is provided. The child chair includes a seat body and a backrest assembly. The backrest connecting structure is configmed to detachably connect the backrest assembly to the seat body. The backrest connecting structure includes a backrest disassembly mechanism. The backrest disassembly mechanism includes an engagement member and a disassembly operating member.

[0005] The engagement member is movably disposed on the backrest assembly and has a first engagement end.

[0006] The disassembly operating member is rotatably connected to the backrest assembly and drivingly connected to the engagement member. The disassembly operating member is capable of being operated to rotate to cause the engagement member to move between a first backrest locking position and a first backrest unlocking position.

[0007] The seat body is provided with an engagement portion. When the engagement member is at the first backrest locking position, the first engagement end is capable of being engaged with the engagement portion to connect the backrest assembly to the seat body. When the engagement member is at the first backrest unlocking position, the first engagement end is disengaged from the engagement portion to allow the backrest assembly to be detached from the seat body.

[0008] Further, one of the engagement member and the disassembly operating member is provided with a connecting boss, and the other one of the engagement member and the disassembly operating member is providedwith a connecting groove extending in a direction perpendicular to a pivot axis of the disassembly operating member. The connecting boss is engaged into the connecting groove and slidable along the connecting groove.

[0009] Further, the connecting groove is provided with an abutment portion at a groove opening thereof. The connecting boss includes a first cylindrical portion and a second cylindrical portion attached to an end face of the first cylindrical portion. The second cylindrical portion has a diameter greater than that of the first cylindrical portion. The second cylindrical portion is accommodated in the connecting groove and abuts against the abutment portion.

[0010] Further, the engagement member includes a first straight section, a second straight section, and a connecting section connected between the first straight section and the second straight section. The first straight section and the second straight section are parallel but not collinear to each other. The first straight section is formed with the first engagement end.

[0011] Further, the backrest disassembly mechanism includes two engagement members. The disassembly operating member is provided with two connecting grooves. The two connecting grooves are rotationally symmetrically arranged with respect to the pivot axis of the disassembly operating member.

[0012] Further, the backrest disassembly mechanism further includes a disassembly reset member adapted to bias the engagement member to cause the engagement member to move towards the first backrest locking position.

[0013] Further, the backrest assembly is provided with a first limiting groove adapted to accommodate the disassembly reset member. The engagement member is provided with a limiting platform. The engagement member is at least partially accommodated in the first limiting groove. One end of the disassembly reset member abuts against the limiting platform, and the other end of the disassembly reset member abuts against a side wall of the first limiting groove.

[0014] Further, the backrest assembly includes a backrest body and a backrest decorative cover. The backrest body and the backrest decorative cover enclose to form an accommodating cavity. The backrest assembly is provided with a first outlet hole in communication with the accommodating cavity. At least a part of the engagement member is accommodated in the accommodating cavity. The first engagement end is capable of at least partially extending out of the accommodating cavity through the first outlet hole to be engaged with the engagement portion.

[0015] Further, the backrest assembly includes a backrest body and a backrest decorative cover. The backrest body and the backrest decorative cover enclose to form an accommodating cavity. The backrest decorative cover being provided with an operating through hole in communication with the accommodating cavity. The disassembly operating member passes through the operating through hole to be pivotably connected to the backrest body.

[0016] Further, a hole wall of the operating through hole is provided with a retaining protrusion, and the disassembly operating member is provided with a retaining recess adapted to be engaged with the retaining protrusion; or a hole wall of the operating through hole is provided with a retaining recess, and the disassembly operating member is provided with a retaining protrusion adapted to be engaged with the retaining recess.

[0017] Further, the disassembly operating member is provided with a protruding portion. There is a smooth transition between the protruding portion and a side face of the disassembly operating member. The retaining recess is formed on the protruding portion.

[0018] Further, the disassembly operating member includes a pivot portion with a cylindrical outer contour and a disassembly operating portion disposed on an end face of the pivot portion. The pivot portion is pivotably connected to the backrest assembly and drivingly connected to the engagement member.

[0019] Further, the backrest connecting structure further includes a backrest adjustment mechanism. The backrest adjustment mechanism includes an adjustment member. The adjustment member is movably disposed on the backrest assembly and has a second engagement end.

[0020] The seat body is provided with at least one adjustment portion. The adjustment member is movable between a second backrest locking position and a second backrest unlocking position. When the adjustment member is at the second backrest locking position, the second engagement end is capable of being engaged with one of the at least one adjustment portion. When the adjustment member is at the second backrest unlocking position, the second engagement end is disengaged from the at least one adjustment portion.

[0021] When the adjustment member is at the second backrest locking position and the engagement member is at the first backrest locking position, the backrest assembly is capable of being fixedly connected to the seat body. When the adjustment member is at the second backrest unlocking position and the engagement member is at the first backrest unlocking position, the backrest assembly is capable of being detached from the seat body.

[0022] Further, a plurality of adjustment portions are provided such that an angle of the backrest assembly relative to the seat body is capable of being changed by engaging the second engagement end with different adjustment portions.

[0023] Further, the backrest adjustment mechanism further includes an adjustment operating member and a driving member.

[0024] The adjustment operating member is movably disposed on the backrest assembly. A movement direction of the adjustment operating member being angled relative to a movement direction of the adjustment member.

[0025] One end of the driving member being connected to the adjustment member, and the other end of the driving member being connected to the adjustment operating member.

[0026] The adjustment operating member is movable between a first position and a second position to drive the adjustment member to move between the second backrest locking position and the second backrest unlocking position.

[0027] Further, the backrest assembly includes a backrest body and a backrest decorative cover. The backrest body and the backrest decorative cover enclose to form an accommodating cavity. The backrest assembly is providedwith a second outlet hole in communication with the accommodating cavity. At least a part of the adjustment member is accommodated in the accommodating cavity. The second engagement end is capable of extending out of the accommodating cavity through the second outlet hole.

[0028] One end of the driving member is accommodated in the accommodating cavity and is connected to the adjustment member, and the other end of the driving member extends out of the accommodating cavity and is connected to the adjustment operating member.

[0029] Further, the backrest adjustment mechanism further includes a first backrest reset member. The first backrest reset member is adapted to bias the adjustment operating member to cause the adjustment operating member to move towards the first position.

[0030] According to another aspect of the present disclosure, a child chair is provided. The child chair includes a seat body, a backrest assembly, and the backrest connecting structure in any one of the above embodiments. The backrest assembly is detachably connected to the seat body through the backrest connecting structure.

[0031] Further, the child chair further includes a plurality of support legs. Each of the plurality of support legs is provided with a first insertion portion. The first insertion portion is provided with an elastic arm. The elastic arm is provided with a locking protrusion thereon.

[0032] The first insertion portion of each of the plurality of support legs is inserted into the insertion hole of corresponding one of the plurality of second insertion portions. The locking protrusion is engaged with the locking hole.

[0033] Further, the insertion portion is provided with a first abutment face, and an angle between a plane where the first abutment face is located and an extension direction D5 of the insertion hole is greater than 90°.

[0034] Each of the plurality of support legs is provided with a second abutment face, and an angle between a plane where the second abutment face is located and an extension direction D6 of the first insertion portion is greater than 90°.

[0035] When the first insertion portion is in insertion fit with the insertion hole, the second abutment face abuts against the first abutment face.

[0036] Further, the child chair further includes a plurality of support legs adapted to support the seat body. Each of the support legs includes a first leg and a second leg.

[0037] The first leg includes a first connecting end and a second connecting end. The first connecting end is connected to the seat body. The second connecting end is provided with a first connecting member. The second leg is provided with a second connecting member.

[0038] One of the first connecting member and the second connecting member is provided with a male thread, and the other one of the first connecting member and the second connecting member is provided with a female thread. The second connecting member is capable of being threadedly connected to the first connecting member toconnect the second leg to the first leg.

[0039] Further, the second connecting end of the first leg is provided with a first accommodating hole. At least a part of the first connecting member is accommodated in the first accommodating hole.

[0040] At least one end of the second leg has a second accommodating hole, and at least part of the second connecting member is accommodated in the second accommodating hole.

[0041] At least an end of the second leg is provided with a second accommodating hole, and at least a part of the second connecting member is accommodated in the second accommodating hole.

[0042] The first connecting member is provided with the female thread, and the second connecting member is provided with the male thread.

[0043] Further, a first decorative cover is disposed on the second connecting end and engaged with the first connecting member. A part of the first decorative cover is accommodated in the first accommodating hole, and the other part of the first decorative cover extends out of the first accommodating hole and is formed with a first arcshaped end face.

[0044] The first decorative cover is provided with a first through hole allowing the first connecting member to be connected to the second connecting member.

[0045] Further, when the first leg is connected to the second leg, the first arc-shaped end face of the first decorative cover extending out of the first accommodating hole is capable of being accommodated in the second accommodating hole of the second leg.

[0046] Further, the first connecting member includes a first connecting portion and a first threaded portion. The first connecting portion is connected to an inner side wall of the first accommodating hole. The first threaded portion is provided with the female thread.

[0047] At least a part of the first threaded portion extends through the first through hole. A side face of the first threaded portion is provided with a first recess. A side wall of the first through hole is provided with a first protrusion. The first protrusion is engaged with the first recess.

[0048] Further, one of the first connecting portion and the first decorative cover is provided with a second protrusion, and the other one of the first connecting portion and the first decorative cover is provided with a second recess. The second protrusion is engaged with the second recess.

[0049] Further, ta second decorative cover is disposed on the second leg. The second decorative cover is accommodated in the second accommodating hole and engaged with the second connecting member. The second decorative cover is provided with a second through hole for the second connecting member to pass therethrough to allow the second connecting member to be threadedly connected to the first connecting member.

[0050] Further, the second decorative cover is provided with an engagement lug. An end of the engagement lug is formed with an engagement hook. The second connecting member is provided with an engagement perforation.The engagement hook extends through the engagement perforation and abuts against an end face of the engagement perforation.

[0051] Further, the child chair further includes a tray detachably connected to the seat body. The tray is provided with a leg connecting portion configmed to be detachably connected to the support leg.

[0052] One of the leg connecting portion and the second leg is provided with a male thread, and the other one of the leg connecting portion and the second leg is provided with a female thread. The second leg is capable of being threadedly connected to the leg connecting portion.

[0053] Further, the child chair further includes a plurality of support legs, a footrest, and a footrest connecting mechanism. The plurality of support legs are adapted to support the seat body. The plurality of support legs include two front support legs. At least a part of the footrest is disposed between the two front support legs. The footrest is detachably connected to the two front support legs through the footrest connecting mechanism.

[0054] Further, the footrest connecting mechanism includes a footrest connecting member. The footrest connecting member is movably disposed on the footrest. An end of the footrest connecting member is formed with a hook portion. Corresponding one of the two front support legs is provided with a hollow cavity. A side wall of the hollow cavity is provided with a connecting hole.

[0055] The footrest connecting member is convertible between a footrest locking position and a footrest unlocking position. When the footrest connecting member is at the footrest locking position, the hook portion extends through the connecting hole and is capable of being seemed by an inner side wall of the hollow cavity. When the footrest connecting member is at the footrest unlocking position, the hook portion is detached from the connecting hole.

[0056] Further, the footrest connecting mechanism further includes a footrest operating member. The footrest operating member is movably disposed on the footrest and connected to the footrest connecting member. The footrest operating member includes an operable footrest operating portion.

[0057] Further, the footrest is provided with a receiving cavity. A side wall of the receiving cavity is provided with an outlet por. A bottom wall of the receiving cavity is provided with an operating port.

[0058] A part of the footrest operating member is received in the receiving cavity, and the footrest operating portion extends out of the receiving cavity through the operating port. The footrest connecting member is connected to the footrest operating member. The hook portion is capable of extending out of the receiving cavity through the outlet port.

[0059] Further, the footrest connecting mechanism includes a footrest reset member. The footrest reset member is adapted to bias the footrest operating member to drive the footrest connecting member to move towards the footrest locking position.

[0060] Further, the support leg includes a first leg and a second leg. A first connecting member is disposed inthe first leg. A second connecting member is disposed in the second leg.

[0061] The footrest connecting mechanism includes a footrest connecting member. The footrest connecting member includes a first part and a second part. The first part is connected to the footrest, and the second part is provided with a connecting recess.

[0062] The second connecting member extends through the connecting recess to be connected to the first connecting member such that the first leg is connected to the second leg and the second part is limited between the first leg and the second leg.

[0063] Further, the support leg includes a first leg and a second leg detachably connected to the first leg. The footrest connecting mechanism includes a footrest connecting member. The footrest connecting member includes a first part and a second par. The first part is connected to the footrest. At least one of the first leg and the second leg is provided with a receiving groove having a shape matching with that of the second part. The receiving groove is adapted to receive the second part and limit the second part therein.

[0064] Further, the child chair further includes a bottom cover assembly and a tray detachably connected to the seat body. The child chair has multiple usage modes. The bottom cover assembly being selectively detachably connected to one of the first leg and the tray according to the desired usage mode of the child chair.

[0065] Further, the first connecting member is provided with a female thread. The bottom cover assembly includes a cover body and a fourth connecting member. The cover body has a curved face adapted to be in contact with the ground. The fourth connecting member is connected to the cover body and provided with a male thread matching with the female thread of the first connecting member.

[0066] The tray has a leg connecting portion provided with a female thread matching with the male thread of the fourth connecting member. The fourth connecting member is selectively in a threaded connection with one of the leg connecting portion and the first connecting member.

[0067] Further, the leg connecting portion is provided with an accommodating groove on a lower face of the tray. In a usage mode where the tray is not connected to the second leg, the fourth connecting member is threadedly connected to the leg connecting portion, and the cover body is at least partially accommodated in the accommodating groove.

[0068] In the backrest connecting structure and the child chair having the backrest connecting structure provided according to the embodiments of the present disclosure, the disassembly operating member is rotated to drive the disassembly engagement member to move between the disassembly locking position and the disassembly unlocking position to allow the backrest assembly to be connected to or detached from the seat body, thereby realizing the quick connection and quick disassembly between the backrest assembly and the seat body. As a result, the child chair can meet the requirements for using in different modes. The backrest connecting structure has a simple structure and is easy to operate.BRIEF DESCRIPTION OF THE DRAWINGS

[0069] FIG. 1 is a schematic structural view of a child chair according to some embodiments of the present disclosure;

[0070] FIG. 2 is an exploded view of the child chair according to some embodiments of the present disclosure;

[0071] FIG. 3 is a schematic structural view of a backrest assembly according to some embodiments of the present disclosure, in which a backrest decorative cover is removed;

[0072] FIG. 4 is an exploded view of the backrest assembly according to some embodiments of the present disclosure, in which a backrest disassembly mechanism is in a locking state;

[0073] FIG. 5 is an exploded view of the backrest assembly according to some embodiments of the present disclosure, in which the backrest disassembly mechanism is in an unlocking state;

[0074] FIG. 6 is a sectional view of the backrest assembly of the child chair taken along A-A in FIG. 2;

[0075] FIG. 7 is a schematic structural view of the backrest disassembly mechanism according to some embodiments of the present disclosure;

[0076] FIG. 8 is a schematic structural view of an engagement member according to some embodiments of the present disclosure;

[0077] FIG. 9 is a schematic structural view of a disassembly operating member according to some embodiments of the present disclosure;

[0078] FIG. 10 is a schematic structural view of the child chair according to some embodiments of the present disclosure from another perspective, in which the child chair is in a first usage mode;

[0079] FIG. 11 is a schematic structural view of the child chair in FIG. 10 in a second usage mode;

[0080] FIG. 12 is a schematic structural view of the child chair in FIG. 10 in a third usage mode;

[0081] FIG. 13 is a sectional view of the child chair in FIG. 10;

[0082] FIG. 14 is an exploded view of the child chair in FIG. 10;

[0083] FIG. 15 is an enlarged view of B in FIG. 13;

[0084] FIG. 16 is a schematic structural view of a second leg according to some embodiments of the present disclosure;

[0085] FIG. 17 is a sectional view of the second leg taken along C-C in FIG. 16;

[0086] FIG. 18 is a sectional view of the child chair in the third usage mode when the second leg is connected to a tray according to some embodiments of the present disclosure;

[0087] FIG. 19 is an exploded view of the child chair according to some embodiments of the present disclosure;

[0088] FIG. 20 is a sectional view of the child chair at a footrest connecting mechanism according to some embodiments of the present disclosure;

[0089] FIG. 21 is a schematic structural view of the footrest connecting mechanism according to someembodiments of the present disclosure;

[0090] FIG. 22 is a schematic structural view of the child chair in the first usage mode according to some other embodiments of the present disclosure;

[0091] FIG. 23 is a schematic structural view of the child chair in FIG. 22 in a third usage mode;

[0092] FIG. 24 is a schematic structural view of the child chair in FIG. 22 from another perspective, in which a footrest is removed;

[0093] FIG. 25 is a sectional view of the child chair taken along E-E in FIG. 24;

[0094] FIG. 26 is an exploded view of the child chair in FIG. 24;

[0095] FIG. 27 is a schematic structural view of a first connecting member of the child chair according to some other embodiments of the present disclosure;

[0096] FIG. 28 is a schematic structural view of a second connecting member of the child chair according to some other embodiments of the present disclosure;

[0097] FIG. 29 is a sectional view of the child chair taken along F-F in FIG. 23;

[0098] FIG. 30 is a bottom view of the tray of the child chair according to some other embodiments of the present disclosure;

[0099] FIG. 31 is a sectional view of the tray taken along H-H in FIG. 30;

[0100] FIG. 32 is an exploded view of the tray in FIG. 30;

[0101] FIG. 33 is a schematic structural view of a cover body of a bottom cover assembly in FIG. 32;

[0102] FIG. 34 is a schematic structural view of a fourth connecting member of the bottom cover assembly inFIG. 32;

[0103] FIG. 35 is a sectional view of the child chair taken along G-G in FIG. 23;

[0104] FIG. 36 is an exploded view of the child chair in FIG. 22; and

[0105] FIG. 37 is an exploded view of the footrest in FIG. 36.

[0106] List of reference numerals

[0107] 100: child chair,

[0108] 1: seat body, 11: seating portion, 12: seat side portion, 13: engagement portion, 14: adjustment portion,15: insertion hole, 151: first abutment face, 152: locking hole, 16: second insertion portion,

[0109] 2: backrest assembly, 21: backrest body, 211: perforation, 212: downward recess, 213: backrest base portion, 214: backrest side portion, 215: limiting plate portion, 216: first limiting protruding portion, 2161: first limiting groove, 2162: first inlet hole, 217: second limiting protruding portion, 2171 : second limiting groove, 2172: second inlet hole,

[0110] 22: backrest decorative cover, 23: accommodating cavity, 24: operating through hole, 241: retaining protrusion, 25: first outlet hole, 26: second outlet hole,[Olli] 300: backrest connecting structure,

[0112] 3: backrest disassembly mechanism, 31: engagement member, 311: first engagement end, 312: connecting boss, 3121: first cylindrical portion, 3122: second cylindrical portion, 315: first straight section, 316: second straight section, 317: connecting section, 318: limiting platform,

[0113] 32: disassembly operating member, 321: pivot portion, 322: disassembly operating portion, 323: connecting groove, 3233: groove opening, 3234: abutment portion, 324: protruding portion, 325: retaining recess, 326: pin,

[0114] 33: disassembly reset member,

[0115] 4: backrest adjustment mechanism, 41: adjustment member, 411: second engagement end, 42: adjustment operating member, 43: driving member, 431: driving cable, 432: connecting terminal, 44: first adjustment reset member, 45: second adjustment reset member,

[0116] 5: support leg, 5a: front support leg, 5b: rear support leg, 501: first tube, 502: second tube, 503: leg body, 504: connecting base, 505: avoidance groove, 506: connecting mechanism, 507: receiving groove,

[0117] 51: first leg, 511: first accommodating hole, 512: elastic arm, 513: locking protrusion, 514: first connecting end, 515: second connecting end, 516: second abutment face, 517: first body,

[0118] 52: second leg, 521: second accommodating hole, 522: second body, 53: first insertion portion, 54: pad,55: hollow cavity, 551: connecting hole,

[0119] 56: first connecting member, 561: first connecting portion, 562: first threaded portion, 563: first recess,564: second recess, 565: first threaded hole,

[0120] 57: second connecting member, 571: engagement perforation, 572: second connecting portion, 573: second threaded portion, 574: first connecting section, 575: second connecting section,

[0121] 58: first decorative cover, 581: first through hole, 582: first arc-shaped end face, 583: first protrusion,584: second protrusion,

[0122] 59: second decorative cover, 591: second through hole, 592: engagement lug, 5921: engagement hook,593: insertion post, 594: arc-shaped concave face,

[0123] 6 : tray, 61 : leg connecting portion, 611: third accommodating hole, 612: third connecting member, 613: second arc-shaped end face, 614: insertion recess, 62: upper face, 63: lower face, 64: accommodating groove,

[0124] 7: footrest, 71: receiving cavity, 72: outlet port, 73: operating port, 74: upper housing, 75: lower housing,76: avoidance notch,

[0125] 8: footrest connecting mechanism, 81: footrest connecting member, 811: hook portion, 814: first part,815: second part, 8151: circular part, 8152: rectangular part, 8153: connecting recess,

[0126] 82: footrest operating member, 821: footrest operating portion, 83: footrest reset member,

[0127] 9: bottom cover assembly, 91: cover body, 911: curved face, 912: abutment end face, 913: fixing hole,92: fourth connecting member, 921: fourth threaded portion, 922: fourth connecting portion,

[0128] R: pivot axis, DI: extension direction of connecting groove, D2: movement direction of engagement member, D3 : movement direction of adjustment member, D4: movement direction of adjustment operating member, D5: extension direction of insertion hole, D6: extension direction of first insertion portion.DETAILED DESCRIPTION

[0129] In order to make the above objectives, features, and advantages of the present disclosure more apparent and understandable, specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. In the following description, many specific details are set forth in order to fully understand the present disclosure. However, the present disclosure can be implemented in many other manners different from those described herein, and those skilled in the art can make similar modifications without departing from the concept of the present disclosure. Therefore, the present disclosure is not limited by the specific embodiments described below.

[0130] In the description of the present disclosure, it is to be understood that the orientation or position relationships indicated by the terms such as "central", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientation or position relationships shown in the accompanying drawings and are intended to facilitate and simplify the description of the present disclosure only, rather than indicating or implying that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore are not to be interpreted as limiting the present disclosure.

[0131] In addition, the terms "first" and "second" are used for descriptive purposes only, which cannot be construed as indicating or implying a relative importance, or implicitly specifying the number of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include at least one feature. In the description of the present disclosure, the term "a plurality of' means at least two, such as two or three, unless otherwise defined explicitly and specifically.

[0132] In the present disclosure, unless otherwise specified and defined explicitly, the terms "mount", "connect", "join", and "fix" should be understood in a broad sense, which may be, for example, a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; or a direct connection, an indirect connection via an intermediate medium, an internal connection between two elements, or an interaction between two elements. Those of ordinary skill in the art can understand the specific meanings of these terms in the present disclosure according to specific situations.

[0133] In the present disclosure, unless otherwise explicitly specified and defined, the expression of a first feature being "on" or "under" a second feature may be the case that the first feature is in direct contact with thesecond feature, or the first feature is in indirect contact with the second feature via an intermediate medium. Furthermore, the expression of the first feature being "over", "above" and "on top of the second feature may be the case that the first feature is directly above or obliquely above the second feature, or only means that the level of the first feature is higher than that of the second feature. The expression of the first feature being "below", "underneath" or "under" the second feature may be the case that the first feature is directly under or obliquely under the second feature, or only means that the level of the first feature is lower than that of the second feature.

[0134] It is to be noted that when one element is referred to as being "fixed to" or "disposed on" another element, it may be directly disposed on the other element or an intermediate element may exist. When one element is referred to be "connected to" another element, it may be directly connected to the another element or an intermediate element may co-exist. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are for illustrative purposes only and do not represent a single implementation.

[0135] FIG. 1 and FIG. 2 are each a schematic structural view of a child chair 100 according to some embodiments of the present disclosure. The child chair 100 includes a seat body 1, a backrest assembly 2, a plurality of support legs 5 configmed to support the seat body 1 , and a tray 6. The backrest assembly 2 is detachably connected to the seat body 1 through a backrest connecting structure 300 to allow the child chair 100 to meet different usage requirements. The seat body 1 includes a seating portion 11 and two seat side portions 12 connected to two sides of the seating portion 11. The backrest assembly 2 is connected to the two seat side portions 12 of the seat body 1 respectively through the backrest connecting structure 300.

[0136] FIG. 3 to FIG. 6 are each a schematic structural view of the backrest assembly according to some embodiments of the present disclosure. The backrest assembly 2 includes a backrest body 21 and a backrest decorative cover 22. The backrest body 21 and the backrest decorative cover 22 enclose to form an accommodating cavity 23. The backrest connecting structure 300 can be at least partially accommodated in the accommodating cavity 23. The backrest body 21 includes a backrest base portion 213 and a backrest side portion 214 disposed surrounding the backrest base portion 213. A limiting plate portion 215 is disposed on the backrest base portion 213. The backrest decorative cover 22 is fastened and connected to the backrest side portion 214 and the limiting plate portion 215 respectively through fasteners, thereby forming the accommodating cavity 23. The backrest side portion 214 forms a side face of the backrest assembly 2.

[0137] As shown in FIG. 3, the backrest connecting structure 300 includes a backrest disassembly mechanism 3 and a backrest adjustment mechanism 4. The backrest disassembly mechanism 3 includes an engagement member 31, a disassembly operating member 32, and a disassembly reset member 33. The engagement member 31 is disposed on the backrest assembly 2 and is movable between a first backrest locking position and a first backrest unlocking position. The disassembly operating member 32 is rotatably connected to the backrest assembly 2 and is drivingly connected to the engagement member 31. The disassembly operating member 32 can be operated to drivethe engagement member 31 to move between the first backrest locking position and the first backrest unlocking position. The engagement member 31 has a movement direction D2 substantially perpendicular to a pivot axis R of the disassembly operating member 32. The disassembly reset member 33 is adapted to bias the engagement member 31 to cause the engagement member 31 to move towards the first backrest locking position. The engagement member 31 has a first engagement end 311. Referring to FIG. 2 together, the seat body 1 is provided with an engagement portion 13. The engagement portion 13 may be, for example, an engagement hole, an engagement recess, an engagement protrusion, or the like provided on the seat side portion 12 of the seat body 1. When the engagement member 31 is at the first backrest locking position, the engagement end 311 can be engaged with the engagement portion 13 to connect the backrest assembly 2 to the seat body 1. When the engagement member 31 is at the first backrest unlocking position, the engagement end 311 is disengaged from the engagement portion 13 to allow the backrest assembly 2 to be detached from the seat body 1. In the backrest connecting structure 300 in this embodiment, the disassembly operating member 32 is rotated to drive the engagement member 31 to move between the disassembly locking position and the disassembly unlocking position to allow the backrest assembly 2 to be connected to or detached from the seat body. Therefore, quick connection and quick disassembly between the backrest assembly 2 and the seat body 1 can be achieved, enabling the child chair 100 to meet requirements of use in different modes. The backrest connecting structure 300 in this embodiment has a simple structure and is easy to operate.

[0138] FIG. 7 is a schematic structural view of the backrest disassembly mechanism 3 according to some embodiments of the present disclosure, and FIG. 8 is a schematic structural view of the engagement member 31 according to some embodiments of the present disclosure. The engagement member 31 includes a first straight section 315 , a second straight section 316, and a connecting section 317 connected between the first straight section 315 and the second straight section 316. The first straight section 315 and the second straight section 316 are parallel but not collinear. In preferred embodiments, the first straight sections 315 of two engagement members 31 are collinear. More preferably, the first straight sections 315 of the two engagement members 31 are collinear and coplanar with the pivot axis R. In this embodiment, the first straight section 315 is substantially parallel to the movement direction D2 of the engagement member 31. The first straight section 315 is formed with the first engagement end 311. Two sides of the backrest assembly 2 are each provided with a first outlet hole 25 in communication with the accommodating cavity 23. The backrest body 21 is provided with a first limiting protruding portion 216 thereon. The first limiting protruding portion 216 is located in the accommodating cavity 23. Two ends of the first limiting protruding portion 216 are connected to the backrest side portion 214 and the limiting plate portion 215 respectively. The first limiting protruding portion 216 is provided with a first limiting groove 2161 in communication with the first outlet hole 25. At least a part of the engagement member 31 is accommodated in the accommodating cavity 23. The first engagement end 311 can extend at least partially out of the accommodatingcavity 23 through the first outlet hole 25 to be engaged with the engagement portion 13. A side wall of the first limiting groove 2161 is provided with a first inlet hole 2162 opposite to the first outlet hole 25, to allow the engagement member 31 to be connected to the disassembly operating member 32 through the first inlet hole 2162. One of the engagement member 31 and the disassembly operating member 32 is provided with a connecting boss 312, and the other one of the engagement member 31 and the disassembly operating member 32 is provided with a connecting groove 323. The engagement member 31 is drivingly connected to the disassembly operating member 32 through engagement of the connecting boss 312 with the connecting groove 323. In this embodiment, an end of the engagement member 31 away from the first engagement end 311 is provided with the connecting boss 312, and the disassembly operating member 32 is provided with the connecting groove 323. The connecting boss 312 is disposed on the second straight section 316. The connecting boss 312 includes a first cylindrical portion 3121 and a second cylindrical portion 3122 attached to an end face of the first cylindrical portion 3121. The second cylindrical portion 3122 has a diameter greater than that of the first cylindrical portion 3121.

[0139] FIG. 9 is a schematic structural view of the disassembly operating member 32 according to some embodiments of the present disclosure. The disassembly operating member 32 includes a pivot portion 321 with a substantially cylindrical outer contour and a disassembly operating portion 322 connected to the pivot portion 321. The pivot portion 321 is pivotably connected to the backrest assembly 2. Referring to FIG. 6 together, the backrest decorative cover 22 is provided with an operating through hole 24 in communication with the accommodating cavity 23. The disassembly operating member 32 is pivotably connected to the backrest body 21 through the operating through hole 24. At least a part of the pivot portion 321 is accommodated in the operating through hole 24, and at least a part of the disassembly operating portion 322 extends out of the operating through hole 24 to facilitate the operation of the disassembly operating member 32. The pivot portion 321 is pivotally connected to the backrest body 21 through a pin 326. The pin 326 defines the pivot axis R of the disassembly operating member 32. Specifically, the backrest body 21 is provided with a perforation 211 for the pin 326 to pass through. An end face of the perforation 211 is formed with a downward recess 212. The disassembly operating member 32 is located at one side of the backrest body 21. A threaded connection portion of the pin 326 passes through the perforation 211 to be connected to the disassembly operating member 32. Ahead of the pin 326 is accommodated in the downward recess 212.

[0140] Further, as shown in FIG. 5 and FIG. 9, a hole wall of the operating through hole 24 is provided with a retaining protrusion 241, and the disassembly operating member 32 is provided with a retaining recess 325 adapted to be engaged with the retaining protrusion 241 to position the disassembly operating member 32. In this embodiment, the disassembly operating member 32 is positioned at a second position through engagement of the retaining protrusion 241 with the retaining recess 325, such that the backrest disassembly mechanism 3 is retained in the unlocking state to allow the backrest assembly 2 to be detached from the seat body 1. It is to be understoodthat the disassembly operating member 32 can be positioned at any desired position by adjusting positions and numbers of the retaining protrusion 241 and the retaining recess 325. In another embodiment not shown, the hole wall of the operating through hole 24 is provided with the retaining recess 325, and the disassembly operating member 32 is provided with the retaining protrusion 241 adapted to be engaged with the retaining recess 325, which is not limited in the present disclosure. Referring to FIG. 5 and FIG. 9, the disassembly operating member 32 is provided with a protruding portion 324. There is a smooth transition between the protruding portion 324 and the side face of the disassembly operating member 32. The retaining recess 325 is formed on the protruding portion 324. Through the provision of the retaining recess 325 on the protruding portion 324, the engagement depth between the retaining protrusion 241 and the retaining recess 325 is increased, so that the engagement between the retaining protrusion 241 and the retaining recess 325 is more stable. In this embodiment, two retaining protrusions 241 are provided, and the two retaining protrusions 241 are rotationally symmetrically arranged about the rotation axis R. Two retaining recesses 325 are provided, and the two retaining recesses 325 are rotationally symmetrically arranged about the rotation axis R. Optionally, four or six retaining recesses 325 may be provided and the number of the retaining recess 325 is a multiple of the number of the retaining protrusion 241. In other embodiments not shown, the number of the retaining protrusion 241 may be one, three, etc., which is not limited in the present disclosure.

[0141] As shown in FIG. 7 and FIG. 9, the disassembly operating member 32 is provided with a connecting groove 323. An extension direction DI of the connecting groove 323 is perpendicular to the pivot axis R of the disassembly operating member 32. The connecting boss 312 is engaged with the connecting groove 323 and is slidable along the connecting groove 323. Specifically, the connecting groove 323 has an groove opening 3233, and an abutment portion 3234 is disposed at the groove opening 3233 of the connecting groove 323. The second cylindrical portion 3122 is accommodated in the connecting groove 323 and can abut against the abutment portion 3234 to prevent the detachment of the connecting boss 312 from the connecting groove 323. In this embodiment, an end of the connecting groove 323 away from the pivot axis R is an opened end, which allows the second cylindrical portion 3122 of the connecting boss 312 to be engaged into the connecting groove 323 through the opened end. In other embodiments, the end of the connecting groove 323 away from the pivot axis R may alternatively be a closed end, and the second cylindrical portion 3122 is connected to the connecting groove 323 in other manners. In this embodiment, two engagement members 31 are provided, and two connecting grooves 323 are provided. The two connecting grooves 323 are rotationally symmetrically arranged about the pivot axis R. Referring to FIG. 4, when the backrest disassembly mechanism 3 is in the locking state, the extension direction of the connecting groove 323 is substantially perpendicular to the movement direction D2 of the engagement member 31. Referring to FIG. 5, when the backrest disassembly mechanism 3 is in the unlocking state, the extension direction of the connecting groove 323 is not perpendicular to the movement direction D2 of the engagement member 31, and in a direction parallel to the movement direction D2 of the engagement member 31, the pivot axis R is locatedbetween the first engagement end 311 of the engagement member 31 and the connecting boss 312.

[0142] Further, as shown in FIG. 3 and FIG. 7, the disassembly reset member 33 is disposed between the engagement member 31 and the backrest assembly 2. The disassembly reset member 33 is, for example, a compression spring. The first straight section 315 of the engagement member 31 is formed with a limiting platform 318. Specifically, an end face of the engagement end 311 facing the second straight section 316 forms the limiting platform 318. The disassembly reset member 33 is sleeved outside the engagement member 31. One end of the disassembly reset member 33 abuts against the limiting platform 318, and the other end of the disassembly reset member 33 abuts against a side wall of the first limiting groove 2161. The disassembly reset member 33 biases the engagement member 31 such that when the disassembly operating member 32 is not being operated, an elastic restoring force from the disassembly reset member 33 can retain the engagement member 31 at the first backrest locking position to retain the engagement of the engagement member 31 with the engagement portion 13.

[0143] The principle of converting the backrest disassembly mechanism 3 between the unlocking state and the locking state in this embodiment will be described in detail below. For the convenience of description, the backrest disassembly mechanism disposed at left side of the backrest assembly 2 in FIG. 4 is illustrated as an example.

[0144] When the backrest disassembly mechanism 3 is in the locking state as shown in FIG. 4, as the disassembly operating member 32 is rotated clockwise, due to the driving connection between the connecting groove 323 and the connecting boss 312, the connecting boss 312 of the engagement member 31 is driven to rotate clockwise with the disassembly operating member 32 while sliding in the connecting groove 323, causing the engagement member 31 to move to right in the direction D2 such that the first engagement end 311 is retracted into the first outlet hole 25 or the first limiting groove 2161 and disengaged from the engagement portion 13. At this time, the backrest disassembly mechanism 3 is in the unlocking state as shown in FIG. 5. As such, the backrest disassembly mechanism 3 is converted from the locking state to the unlocking state.

[0145] When the backrest disassembly mechanism 3 is in the unlocking state as shown in FIG. 5, the disassembly reset member 33 is in an elastic compression state. When no external force is applied to the backrest disassembly mechanism 3, the engagement member 31 moves to left in the direction D2 under the elastic restoring force of the disassembly reset member 33, causing the first engagement end 311 to extend at least partially out of the accommodating cavity 23 through the first outlet hole 25 to be engaged with the engagement portion 13. Simultaneously, due to the driving connection between the connecting groove 323 and the connecting boss 312, the disassembly operating member 32 is driven to rotate counterclockwise back to its initial position. At this time, the backrest disassembly mechanism 3 is in the locking state as shown in FIG. 4. Therefore, upon removal of the external force, the backrest disassembly mechanism 3 can automatically convert from the unlocking state to the locking state under the elastic restoring force of the disassembly reset member 33.

[0146] In some embodiments, as shown in FIG. 3 and FIG. 6, the backrest adjustment mechanism 4 includesan adjustment member 41, an adjustment operating member 42, and a driving member 43. The adjustment operating member 42 is drivingly connected to the adjustment member 41 through the driving member 43. Referring to FIG. 2 together, the seat body 1 is provided with at least one adjustment portion 14. The adjustment portion 14 may be, for example, an adjustment hole, an adjusting recess, an adjusting protrusion, or the like provided on the seat side portion 12 of the seat body 1. The adjustment member 41 is movably disposed on the backrest assembly 2 and is convertible between a second backrest locking position and a second backrest unlocking position. When the adjustment member 41 is at the second backrest locking position, a second engagement end 411 of the adjustment member 41 can be engaged with one of the at least one adjustment portion 14. When the adjustment member 41 is at the second backrest unlocking position, the second engagement end 411 can be disengaged from the adjustment portion 14. In this embodiment, when the adjustment member 41 is at the second backrest locking position and the engagement member 31 is at the first backrest locking position, the backrest assembly 2 can be fixedly connected to the seat body 1. When the adjustment member 41 is at the second backrest unlocking position and the engagement member 31 is at the first backrest unlocking position, the backrest assembly 2 can be detached from the seat body 1.

[0147] In some embodiments, as shown in FIG. 2, multiple adjustment portions, such as two, three, or four, are provided. The adjustment portions 14 are provided on the seat side portion 12 of the seat body 1, and each of the seat side portions 12 is provided with multiple adjustment portions 14. When the adjustment member 41 is engaged with different adjustment portions 14, the backrest assembly 2 can be locked at different angles. That is, the relative angle of the backrest assembly 2 to the seating portion 11 of the seat body 1 can be changed by engaging the adjustment member 41 with different adjustment portions 14. For convenience of description, multiple adjustment portions 14 located on one of the seat side portions 12 of the seat body 1 are illustrated as an example. The multiple adjustment portions 14 are located above the engagement portion 13. The multiple adjustment portions 14 are arranged along an arc with the engagement portion 13 as a center and a distance between the engagement member 31 and the adjustment member 41 as a radius.

[0148] In this embodiment, by using the backrest disassembly mechanism 3 in combination with the backrest adjustment mechanism 4, the backrest assembly 2 can be fixedly connected to the seat body 1 to prevent the change in the angle of the backrest assembly 2 during use. Specifically, in this embodiment, the backrest disassembly mechanism 3 and the backrest adjustment mechanism 4 provide at least three connection points for the seat body 1 and the backrest assembly 2 so that the backrest assembly 2 is fixedly connected to the seat body 1. For example, the backrest assembly 2 is connected to each of the two seat side portions 12 of the seat body 1 through the engagement member 31 of the backrest disassembly mechanism 3, providing at least two connection points for the seat body 1 and the backrest assembly 2, and the backrest assembly 2 is connected to one or each of the two seat side portions 12 of the seat body 1 through the adjustment member 41 of the backrest adjustment mechanism 4,providing at least one connection point for the seat body 1 and the backrest assembly 2. In another example, the backrest assembly 2 is connected to one of the seat side portions 12 of the seat body 1 through the engagement member 31 of the backrest disassembly mechanism 3, providing at least one connection point for the seat body 1 and the backrest assembly 2, and the backrest assembly 2 is connected to each of the two seat side portions 12 of the seat body 1 through the adjustment member 41 of the backrest adjustment mechanism 4, providing at least at least two connection points for the seat body 1 and the backrest assembly 2. It is to be noted that "fixedly connected" means a non-movable connection between the backrest assembly 2 and the seat body 1 (i.e., the backrest assembly 2 is locked at a fixed angle relative to the seating portion 11) instead of a non-detachable connection between the backrest assembly 2 and the seat body 1. In other embodiments not shown, the backrest adjustment mechanism 4 may not be provided, and alternatively, for example, a part of the backrest assembly 2 may be connected to the seating portion 11 of the seat body 1, and the backrest assembly 2 is connected to the seat side portions 12 of the seat body 1 through the backrest disassembly mechanism 3, thereby achieving the fixed connection between the backrest assembly 2 and the seat body 1. In some other embodiments, at least three connection points may be formed between the backrest assembly 2 and the seat body 1 through the backrest disassembly mechanism 3, thereby achieving the fixed connection between the backrest assembly 2 and the seat body 1.

[0149] As shown in FIG. 3, the adjustment member 41 is pin-shaped. One end of the adjustment member 41 is connected to the driving member 43, and the other end of the adjustment member 41 is provided with a second engagement end 411. A movement direction D3 of the adjustment member 41 is substantially parallel to the movement direction D2 of the engagement member 31. The side face of the backrest assembly 2 is provided with a second outlet hole 26 for the adjustment member 41 to pass through. Specifically, the second outlet hole 26 extends through the backrest side portion 214 of the backrest body 21. The backrest body 21 is provided with a second limiting protruding portion 217 thereon. The second limiting protruding portion 217 is at least partially accommodated in the accommodating cavity 23, with two ends thereof connected to the backrest side portion 214 and the limiting plate portion 215 respectively. The second limiting protruding portion 217 is provided with a second limiting groove 2171 in communication with the second outlet hole 26. The adjustment member 41 is at least partially accommodated in the second limiting groove 2171, and can extend out of the accommodating cavity 23 through the second outlet hole 26. A side wall of the second limiting groove 2171 is provided with a second inlet hole 2172 which allows the driving member 43 to be connected to the adjustment member 41.

[0150] As shown in FIG. 3, the adjustment operating member 42 is movably disposed on the backrest body 21 and is movable between a first position and a second position. When the adjustment operating member 42 is at the first position, the adjustment member 41 at in the second backrest locking position and the backrest adjustment mechanism 4 is in the locking state. When the adjustment operating member 42 is at the second position, the adjustment member 41 is at the second backrest unlocking position and the backrest adjustment mechanism 4 is inthe unlocking state. A movement direction D4 of the adjustment operating member 42 is substantially perpendicular to the movement direction D3 of the adjustment member 41. The adjustment operating member 42 is at least partially located outside the accommodating cavity 23 to facilitate the operation of the adjustment operating member 42.

[0151] Further, as shown in FIG. 3, the driving member 43 includes a driving cable 431. One end of the driving cable 431 is connected to the adjustment operating member 42, and the other end of the driving cable is connected to the adjustment member 41 through a connecting terminal 432. The driving cable 431 is, for example, a steel rope, a carbon fiber rope, a plastic strip, or the like. The driving cable 431 is slidably disposed along the limiting plate portion 215. The limiting plate portion 215 limits and guides the sliding of the driving cable 431.

[0152] Referring to FIG. 6 together, the backrest adjustment mechanism 4 further includes a first adjustment reset member 44 and a second adjustment reset member 45. The first adjustment reset member 44 is adapted to bias the adjustment operating member 42 to cause the adjustment operating member 42 to move towards the first position. The first adjustment reset member 44 is, for example, a compression spring. The first adjustment reset member 44 is disposed between the backrest body 21 and the adjustment operating member 42. One end of the first adjustment reset member 44 abuts against the backrest body 21, and the other end of the first adjustment reset member 44 abuts against the adjustment operating member 42. The second adjustment reset member 45 is adapted to bias the adjustment member 41 to cause the second adjustment reset member 45 to move towards the second backrest locking position. The second adjustment reset member 45 is, for example, a compression spring. The second adjustment reset member 45 is sleeved onto the driving member 43. One end of the second adjustment reset member 45 abuts against the connecting terminal 432, and the other end of the second adjustment reset member 45 abuts against the side wall of the second limiting groove 2171.

[0153] In other embodiments, the backrest adjustment mechanism 4 may not be provided with the second adjustment reset member 45. The driving member 43 may be made of, for example, plastic. When the adjustment operating member 42 moves from the first position to the second position, the adjustment operating member 42 can drive the adjustment member 41 to move from the second backrest locking position to the second backrest unlocking position through the driving member 43. When the adjustment operating member 42 moves from the second position to the first position, the adjustment operating member 42 can drive the adjustment member 41 to move from the second backrest unlocking position to the second backrest locking position through the driving member 43.

[0154] FIG. 10 to FIG. 12 are schematic structural views of the child chair 100 in different usage modes according to some embodiments of the present disclosure respectively. FIG. 10 illustrates a first usage mode, i.e., a high dining chair mode, which is suitable for infants and toddlers aged about six months to three years old to dine alongside the adults at the same table, ensuring they can sit securely in the sitting space without the risk of slipping off easily from the high dining chair. FIG. 11 illustrates a second usage mode, i.e., a small dining chair mode, which is suitable for infants and toddlers aged about six months to three years old for dining purposes. Compared with thefirst usage mode, the child chair 100 in this mode has a lower height and occupies less space, making it convenient for the infants and toddlers to enter and exit the child chair 100 independently. FIG. 12 illustrates a third usage mode, i.e., a child seat mode, which is suitable for infants or children aged about 3 to 12 years old and offers versatility beyond just dining, being applicable for various activities such as learning or playing. The child chair 100 in this embodiment has multiple usage modes, catering to different scenarios and enhancing the efficiency of its use.

[0155] FIG. 13 to FIG. 15 are schematic structural views of the child chair according to some embodiments of the present disclosure. In some embodiments, each of the support legs 5 is detachably connected to the seat body 1. The child chair 100 is provided with four support legs 5, including two front support legs 5a and two rear support legs 5b. It should be understood that in other embodiments, the child chair 100 may alternatively be provided with other numbers of support legs 5, such as three, which is not limited in the present disclosure. For convenience of description, one of the support legs 5 is illustrated as an example.

[0156] As shown in FIG. 13 and FIG. 15, the support leg 5 has a tubular structure with a hollow cavity 55. The support leg 5 includes a first tube 501 and a second tube 502. One end of the first tube 501 is inserted into the second tube 502, and the other end of the first tube 501 is adapted to be connected to the seat body 1. The second tube 502 may be made of, for example, stainless steel. The first tube 501 may be made of, for example, plastic. As such, not only the strength of the support leg 5 can be ensured, but also a weight of the support leg 5 can be reduced and an appearance of the support leg 5 can be more aesthetic. The first tube 501 is formed with a first insertion portion 53 of the support leg 5 to be connected to the seat body 1. An end of the support leg 5 away from the first insertion portion 53 is provided with a pad 54 to help the support leg 5 be supported on the ground more stably. The first insertion portion 53 of the support leg 5 is provided with an elastic arm 512. The elastic arm 512 is provided with a locking protrusion 513 thereon. The seat body 1 is provided with a second insertion portion 16. The second insertion portion 16 is provided with an insertion hole 15 and a locking hole 152. The insertion hole 15 is adapted to accommodate the support leg 5. The locking hole 152 extends through a side wall of the insertion hole 15. The first insertion portion 53 of the support leg 5 is in insertion fit with the insertion hole 15. The locking protrusion 513 is engaged with the locking hole 152.

[0157] Further, the insertion hole 15 is provided with a first abutment face 151 therein. An angle between a plane where the first abutment face 151 is located and an extension direction D5 of the insertion hole 15 is greater than 90°. The support leg 5 is provided with a second abutment face 516. An angle between a plane where the second end face 516 is located and an extension direction D6 of the first insertion portion 53 is greater than 90°. The second abutment face 516 may be formed by, for example, an end face of the second tube 502. When the first insertion portion 53 is in insertion fit with the insertion hole 15, the second abutment face 516 abuts against the first abutment face 151. Through the cooperation between the second abutment face 516 and the first abutment face 151, the rotation of the support leg 5 in the insertion hole 15 can be prevented.

[0158] In some embodiments, as shown in FIG. 14 and FIG. 15, the support leg 5 includes a first leg 51 and a second leg 52. The first leg 51 is detachably connected to the second leg 52. By providing the first leg 51 and the second leg 52 that are detachably connected to each, the child chair 100 can easily convert between the first usage mode, the second usage mode, and the third usage mode. The first leg 51 includes a first connecting end 514 and a second connecting end 515. The first connecting end 514 is formed with a first insertion portion 53 to be connected to the seat body 1. The second connecting end 515 is provided with a first connecting member 56. The first connecting member 56 is provided with a female thread. The second leg 52 is provided with a second connecting member 57. The second connecting member 57 is provided with a male thread. The second connecting member 57 is in a threaded connection with the first connecting member 56 through the male thread and the female thread. It should be understood that in other embodiments, the first connecting member 56 may be provided with the male thread and the second connecting member 57 may be provided with the female thread, which is not limited in the present disclosure.

[0159] FIG. 16 to FIG. 17 are schematic structural views of the first leg 51 according to some embodiments of the present disclosure. Further, in some embodiments, as shown in FIG. 15 to FIG. 17, at least the second connecting end 515 of the first leg 51 is provided with a first accommodating hole 511. For example, the first leg 51 has a tubular structure with a hollow cavity 55. The hollow cavity 55 of the first leg 51 forms the first accommodating hole 511. The first connecting member 56 is accommodated in the first accommodating hole 511. The first connecting member 56 includes a first connecting portion 561 and a first threaded portion 562. The first connecting portion 561 is connected to an inner wall of the first accommodating hole 511 by, for example, bonding or welding. The first threaded portion 562 is provided with the female thread.

[0160] The first leg 51 is further provided with a first decorative cover 58. A part of the first decorative cover58 is accommodated in the first accommodating hole 511 and engaged with the first connecting member 56, and another part of the first decorative cover 58 extends out of the first accommodating hole 511 and has a first arcshaped end face 582. The first decorative cover 58 is provided with a first through hole 581 which allows the female thread of the first connecting member 56 to be connected to the male thread of the second connecting member 57. Specifically, the first threaded portion 562 passes through the first through hole 581. A side face of the first threaded portion 562 is provided with a first recess 563. A side wall of the first through 581 is provided with a first protrusion 583. The first protrusion 583 is engaged with the first recess 563. An end of the first decorative cover 58 away from the first arc-shaped end face 582 is provided with a second protrusion 584. The first connecting portion 561 of the first connecting member 56 is provided with a second recess 564. The second protrusion 584 is engaged with the second recess 564. In this way, the rotation of the first decorative cover 58 relative to the first connecting member 56 can be prevented.

[0161] As shown in FIG. 15 and FIG. 18, at least one end of the second leg 52 is provided with a secondaccommodating hole 521. For example, the second leg 52 has a tubular structure with a hollow cavity 55, and the hollow cavity 55 of the second leg 52 forms the second accommodating hole 521. At least a part of the second connecting member 57 is accommodated in the second accommodating hole 521. The second connecting member 57 is connected to a side wall of the second accommodating hole 521 by, for example, welding or bonding. The second connecting member 57 includes a second connecting portion 572 and a second threaded portion 573 provided with a male thread, and the second connecting portion 572 is connected to the side wall of the second accommodating hole 521.

[0162] Further, the second leg 52 is further provided with a second decorative cover 59. The pad 54 is disposed on an end of the second leg 52 away from the second decorative cover 59. The second decorative cover 59 is at least partially accommodated in the second accommodating hole 521 and engaged with the second connecting member 57. The second decorative cover 59 is provided with a second through hole 591 for the second connecting member 57 to pass through, allowing the second connecting member 57 to be in a threaded connection with the first connecting member 56. The second decorative cover 59 is provided with an engagement lug 592. A terminal end of the engagement lug 592 is formed with an engagement hook 5921. The second connecting portion 572 of the second connecting member 57 is provided with an engagement perforation 571. The engagement hook 5921 passes through the engagement perforation 571 and abuts against an end face of the engagement perforation 571. The second threaded portion 573 of the second connecting member 57 passes through the second through hole 591 and extends out of the second accommodating hole 521. The second decorative cover 59 is provided with an insertion post 593 adapted to be in insertion fit with the first through hole 581 of the first decorative cover 58 and an arc-shaped concave face 594 adapted to be fit with the first arc-shaped end face 582 of the first decorative cover 58. The first insertion portion 53 is provided with the second through hole 591. The arc-shaped concave face 594 is disposed surrounding the insertion post 593. When the first leg 51 is connected to the second leg 52, the first arc-shaped end face 582 can be accommodated in the second accommodating hole 521 of the second leg 52, and the first arc-shaped end face 582 of the first decorative cover 58 can fit with the arc-shaped concave face 594 of the second decorative cover 59.

[0163] FIG. 22 to FIG. 25 are schematic structural views of the child chair 100 according to some other embodiments of the present disclosure. The support leg 5 of the child chair 100 in those embodiments has at least the following differences from the support leg 5 of the child chair 100 in some embodiments shown in FIG. 13 to FIG. 15 above.

[0164] As shown in FIG. 25, in some other embodiments, the support leg 5 includes a leg body 503 and a connecting base 504 disposed on the leg body 503. The connecting base 504 is sleeved onto the leg body 503 and is configured to be connected to the seat body 1. The leg body 503 may be made of, for example, wood. The connecting base 504 may be made of, for example, a plastic material. The connecting base 504 forms a first insertionportion 53 of the support leg 5 to be connected to the seat body 1. An end of the support leg 5 away from the first insertion portion 53 is provided with a pad 54 to help the support leg 5 be supported on the ground more stably. The first insertion portion 53 of the support leg 5 is provided with an elastic arm 512. That is, the connecting base 504 is provided with the elastic arm 512. The elastic arm 512 is provided with a locking protrusion 513 thereon. The seat body 1 is provided with a second insertion portion 16. The second insertion portion 16 is provided with an insertion hole 15 and a locking hole 152. The insertion hole 15 is adapted to accommodate the support leg 5. The locking hole 152 extends through a side wall of the insertion hole 15. The first insertion portion 53 of the support leg 5 is in insertion fit with the insertion hole 15. The locking protrusion 513 is engaged with the locking hole 152. In this embodiment, a part of the leg body 503 is inserted into the connecting base 504 and is provided with an avoidance groove 505. The avoidance groove 505 faces the elastic arm 512 and has an opening facing the elastic arm 512. The avoidance groove 505 is configmed to provide an elastic deformation space for the elastic arm 512, so that the locking protrusion 513 on the elastic arm 512 can enter the locking hole 152 for locking or withdraw from the locking hole 152.

[0165] As shown in FIG. 25 and FIG. 26, the second insertion portion 16 has a first abutment face 151, and one end of the insertion hole 15 is formed with the first abutment face 151. An angle between a plane where the first abutment face 151 is located and an extension direction D5 of the insertion hole 15 is greater than 90°. The support leg 5 is provided with a second abutment face 516. Specifically, the leg body 503 is formed with the second abutment face 516. An angle between a plane where the second abutment face 516 is located and an extension direction D6 of the first insertion portion 53 is greater than 90°. When the first insertion portion 53 is in insertion fit with the insertion hole 15, the second abutment face 516 abuts against the first abutment face 151.

[0166] As shown in FIG. 25 and FIG. 26, in some other embodiments, the support leg 5 includes a first leg 51 and a second leg 52. The first leg 51 is detachably connected to the second leg 52. The first leg 51 includes a first connecting end 514 and a second connecting end 515. The first connecting end 514 forms the first insertion portion 53 to be connected to the seat body 1. The second connecting end 515 is detachably connected to the second leg 52 through a connecting mechanism 506. The connecting mechanism 506 includes a first connecting member 56 and a second connecting member 57. The first connecting member 56 is connected to the first leg 51, and the second connecting member 57 is connected to the second leg 52. The first connecting member 56 can be in a threaded connection with the second connecting member 57. In this embodiment, the first leg 51 includes a first body 517 and a connecting base 504 sleeved onto the first body 517. The first body 517 has, for example, a solid rod-shaped structure. The first body 517 may be made of wood, plastic, or the like. The second leg 52 includes a second body 522. The second body 522 has, for example, a solid rod-shaped structure, and may be made of wood, plastic, or the like. The second body 522 and the first body 517 jointly form the leg body 503 of the support leg 5. The second connecting end 515 of the first leg 51 is provided with a first accommodating hole 511. That is, the secondconnecting end 515 of the first body 517 is provided with the first accommodating hole 511. The first connecting member 56 is fixed in the first accommodating hole 511. In this embodiment, an inner wall of the first accommodating hole 511 is provided with no thread, an outer side wall of the first connecting member 56 is provided with a self-tapping thread, and the first connecting member 56 is connected to the inner wall of the first accommodating hole 511 through the self-tapping thread, allowing the first connecting member 56 to be fixed in the first accommodating hole 511. In an alternative embodiment, a female thread may be formed on the inner wall of the first accommodating hole 511, the first connecting member 56 is provided with a male thread matching with the female thread of the first accommodating hole 511, and the first connecting member 56 is in a threaded connection with the first accommodating hole 511. Referring to FIG. 27 together, in this embodiment, the first connecting member 56 is further provided with a first threaded hole 565, and the first threaded hole 565 extends through at least one end of the first connecting member 56 and is configured to achieve a threaded connection with the second connecting member 57. The second leg 52 has, for example, a solid rod-shaped structure. The second leg 52 may be made of wood, plastic, or the like. Referring to FIG. 28 and FIG. 29 together, the second connecting member 57 includes a first connecting section 574 and a second connecting section 575. The second connecting section 575 forms the self-tapping screw and is connected to the second leg 52. The first connecting section 574 is provided with a male thread matching with the female thread of the first threaded hole 565 and configured to be in a threaded connection with the first threaded hole 565.

[0167] FIG. 18 is a schematic structural view of connection between the second leg 52 and the tray 6 of the child chair 100 in the third usage mode according to some embodiments of the present disclosure. In some embodiments, referring to FIG. 10 to FIG. 12 together, the tray 6 is detachably connected to the seat body 1, and the tray 6 can be also detachably connected to the second leg 52 such that the child chair 100 can be converted to the third usage mode as shown in FIG. 18. In this mode, the child chair 100 in the first usage mode is reassembled into a small chair and a small table. The connection between the tray 6 and the seat body 1 is not the focus of the present disclosure and will not be described in detail herein.

[0168] Further, as shown in FIG. 18, the tray 6 has an upper face 62 and a lower face 63. The upper face 62 of the tray 6 is adapted to place items. The lower face 63 of the tray 6 is provided with a leg connecting portion 61 adapted to be connected to the second leg 52. In this embodiment, the leg connecting portion 61 is provided with a third accommodating hole 611. A third connecting member 612 is disposed in the third accommodating hole 611. The third connecting member 612 is provided with a female thread adapted to fit with the male thread of the second connecting member 57. The insertion post 593 of the second decorative cover 59 is at least partially accommodated in the third accommodating hole 611. The second connecting member 57 is inserted into the third accommodating hole 611 and is in a threaded connection with the third connecting member 612. The leg connecting portion 61 has a second arc-shaped end face 613 adapted to fit with the arc-shaped concave face 594. Shapes of the second arc-shaped end face 613 and the first arc-shaped end face 582 are substantially the same. The leg connecting portion 61 is further provided with an insertion recess 614. A side wall of the second accommodating hole 521 is at least partially in insertion fit with the insertion recess 614.

[0169] FIG. 29 is a schematic structural view of connection between the second leg 52 and the tray 6 of the child chair 100 in the third usage mode according to some other embodiments of the present disclosure. Referring to FIG. 26 together, the tray 6 is detachably connected to the seat body 1, and can also be detachably connected to the second leg 52 such that the child chair 100 can be converted to the third usage mode as shown in FIG. 12. The tray 6 in those embodiments has at least the following differences from the tray 6 in the embodiments as described above.

[0170] As shown in FIG. 29 to FIG. 32, the tray 6 is provided with a leg connecting portion 61 adapted to be connected to the second leg 52. The leg connecting portion 61 is provided with a third accommodating hole 611. A third connecting member 612 is disposed in the third accommodating hole 611. The third connecting member 612 is provided with a female thread adapted to fit with the male thread on the first connecting section 574 of the second connecting member 57. The third connecting member 612 is, for example, a nut. A structure of the third connecting member 612 may be the same as that of the first connecting member 56. The second connecting section 575 of the second connecting member 57 may be selectively connected to one of the first connecting member 56 and the third connecting member 612 according to the usage mode of the child chair 100. An outer contour in cross section of the third connecting member 612 may be circular, square, hexagonal, or the like, which is not limited in the present disclosure. The third connecting member 612 may be fixed in the third accommodating hole 611 by gluing, interference fit, a threaded connection, overmolding, or the like. In the third usage mode of the child chair 100, the second leg 52 is in a threaded connection with the third connecting member 612 through the first connecting section 574 of the second connecting member 57.

[0171] As shown in FIG. 31 and FIG. 32, in some other embodiments, the child chair 100 is further provided with a bottom cover assembly 9. The bottom cover assembly 9 is detachably connected to the lower face 63 of the tray 6, specifically the leg connecting portion 61 of the tray 6. Referring to FIG. 35 together, the bottom cover assembly 9 can be detachably connected to the third connecting member 612, and can also be connected to the first connecting member 56 disposed in the first leg 51 to help the first leg 51 be well supported on the ground and achieve the effects of slip resistance and noise reduction. When the child chair 100 is used in the first usage mode or the second usage mode, the first leg 51 is connected to the second leg 52. In this case, the bottom cover assembly 9 is not required, and the bottom cover assembly 9 can be hidden and stored under the tray 6 by connecting the bottom cover assembly 9 to the third connecting member 612. When the child chair 100 is required to convert to the third usage mode, the bottom cover assembly 9 can be removed from the tray 6 and connected to the first connecting member 56 disposed in the first leg 51. In this way, the bottom cover assembly 9 can be easily takenwhen required, without affecting the function and the appearance of the tray 6.

[0172] As shown in FIG. 30 and FIG. 32, in this embodiment, the number of the bottom cover assembly 9 corresponds to the number of the third connecting member 612 and is greater than or equal to the number of the support leg 5. In this embodiment, four support legs 5 are provided, and four bottom cover assemblies 9 are also provided on the tray 6. An outer contour of the tray 6 is generally in a shape of a trapezoid. The bottom cover assemblies 9 are disposed near four comers of the trapezoid, respectively. In other embodiments, the tray 6 may alternatively be provided, at another positions, with connecting portions configured to receive the bottom cover assemblies 9, and the number of the bottom cover assemblies 9 may be different from the number of the third connecting members 612. For convenience of description, one of the bottom cover assemblies 9 is illustrated as an example.

[0173] As shown in FIG. 32 to FIG. 35, the bottom cover assembly 9 includes a cover body 91 and a fourth connecting member 92 connected to each other. The fourth connecting member 92 is selectively detachably connected to one of the third connecting member 612 and the first connecting member 56 according to the usage mode of the child chair 100. The fourth connecting member 92 is fixedly connected to the cover body 91 , specifically detachably connected to the cover body 91 or integrally formed with the cover body 91. In this embodiment, the fourth connecting member 92 is made of, for example, metal. The fourth connecting member 92 includes a fourth threaded portion 921 and a fourth connecting portion 922. The fourth connecting portion 922 is fixedly connected to the cover body 91. The fourth threaded portion 921 is provided with a male thread adapted to fit with either the female thread of the third connecting member 612 or the female thread of the first connecting member 56. The fourth threaded portion 921 is configured to be selectively connected to the first connecting member 56 or the third connecting member 612. For example, the fourth connecting member 92 is a bolt.

[0174] Referring to FIG. 32, the cover 91 has an outer contour generally in a shape of hemisphere. The cover body 91 has a curved face 911 and an abutment end face 912. The curved face 911 is convex. The abutment end face 912 is generally in a shape of a circular ring. In other words, the abutment end face 912 is generally a planar annular end face. The cover body 91 is made of, for example, plastic, rubber, wood, or the like. When the cover body 91 is connected to the first leg 51, the first leg 51 is supported on the ground through the cover body 91 to prevent slipping and reduce noise. The fourth threaded portion 921 of the fourth connecting member 92 can be fully inserted into the first leg 51, so that the abutment end face 912 can abut against the end face of the first leg 51, which can partially share a force transferred to the fourth connecting member 92. The fourth threaded portion 921 extends out of the cover body 91 in a direction away from the curved face 911. The cover body 91 is provided with a fixing hole 913. The fourth connecting portion 922 of the fourth connecting member 92 is fixed in the fixing hole 913. The fourth threaded portion 921extends out of the fixing hole 913. The fixing hole 913 has a shape in cross section of substantially hexagon, but is not limited thereto. For example, the bottom cover assembly 9 may be manufacturedthrough the following steps: fixing the fourth connecting portion 922 of the fourth connecting member 92 (e.g., a bolt), which was previously manufactured, in a mold for molding the cover body 91, and then obtaining, by an injection molding process, the cover body 91 enclosing the fourth connecting portion 922, thereby fixedly connecting the fourth connecting portion 922 in the fixing hole 913 of the cover body 91. Alternatively, the bottom cover assembly 9 is manufactured by fixedly connecting the fourth connecting portion 922 in the fixing hole 913 of the cover body 91 by gluing, interference fit, or other manners.

[0175] As shown in FIG. 32, the lower face 63 of the tray 6 is provided with an accommodating groove 64 located on the leg connecting portion 61. The third accommodating hole 611 extends through a bottom wall of the accommodating groove 64. The bottom wall of the accommodating groove 64 is planar. When the child chair 100 is in the first usage mode or the second usage mode (i.e., the bottom cover assembly 9 is connected to the leg connecting portion 61), the cover body 91 is at least partially accommodated in the accommodating groove 64, and the abutment end face 912 of the cover body 91 is in contact with the bottom wall of the accommodating groove 64. By providing the accommodating groove 64, an extent to which the cover body 91 protrudes out from the lower face 63 of the tray 6 can be reduced, reducing the potential interference caused by the cover body 91. When the child chair 100 is in the third usage mode (i.e., the second leg 57 is connected to the leg connecting portion 61), the second leg 57 is at least partially accommodated in the accommodating groove 64, the end face of the second leg 57 abuts against the bottom wall of the accommodating groove 64, and a side face of the second leg 57 is limited by the accommodating groove 64, thereby improving the strength of the connection between the second leg 57 and the leg connecting portion 61.

[0176] FIG. 19 to FIG. 21 are schematic structural views of a footrest 7 and a footrest connecting mechanism 8 according to some embodiments of the present disclosure. The child chair 100 is further provided with the footrest 7 and the footrest connecting mechanism 8. At least a part of the footrest 7 is disposed between the two front support legs 5a. The footrest 7 is detachably connected to the two front support legs 5a through the footrest connecting mechanism 8. In this embodiment, the child chair 100 is provided with two footrest connecting mechanisms 8, and the footrest 7 is connected to each of the two front support legs 5a through corresponding one of the two footrest connecting mechanisms 8. It is to be understood that in other embodiments, the footrest 7 may be connected to one of the two front support legs 5a through the footrest connecting mechanism 8, and to the other one of the two front support legs 5a through other connecting mechanism, which is not limited in the present disclosure. For convenience of description, one of the footrest connecting mechanisms 8 is illustrated as an example.

[0177] As shown in FIG. 19 to FIG. 21, the footrest connecting mechanism includes a footrest connecting member 81 , a footrest operating member 82 drivingly connected to the footrest connecting member 81 , and a footrest reset member 83. The footrest connecting member 81 is movably disposed in the footrest 7. The footrest connecting member 81 is formed with a hook portion 811 at an end thereof. The footrest 7 is provided with a receiving cavity71. A side wall of the receiving cavity 71 is provided with an outlet port 72. The footrest connecting member 81 is at least partially received in the receiving cavity 71. The hook portion 811 of the footrest connecting member 81 can extend out of the receiving cavity 71 through the outlet port 72. The corresponding front support leg 5a is provided with a hollow cavity 55. A side wall of the hollow cavity 55 is provided with a connecting hole 551. The footrest connecting member 81 can convert between a footrest locking position and a footrest unlocking position. When the footrest connecting member 81 is at the footrest locking position, the hook portion 811 is passed through the connecting hole 551 and secured by an inner side wall of the hollow cavity 55, thereby connecting the footrest 7 to the front support leg 5a. The hook portion 811 is secured by the inner side wall of the hollow cavity 55, which prevents the accidental detachment of the footrest connecting member 81 from the connecting hole 551, improving the stability of the connection between the footrest 7 and the front support leg 5 a. When the footrest connecting member 81 is at the footrest unlocking position, the hook portion 811 is detached from the connecting hole 551, so that the footrest 7 can be removed from the support leg 5. In this embodiment, the connecting hole 551 is an elongated hole extending along a length direction of the support leg 5. When there is a need to separate the footrest 7 from the support leg 5, the footrest 7 is moved upwards, so that the hook portion 811 of the footrest connecting member 81 is detached from the inner wall of the hollow cavity 55 to allow the footrest connecting member 81 to be detached from the connecting hole 551. Subsequently, the footrest operating member 82 is operated to drive the connecting member 81 to retract to be disengaged from the connecting hole 551, so that the footrest 7 can be removed. The connecting hole 551 is disposed on the first leg 51. A height of the footrest connecting member 81 can be changed by changing the position and the number of the connecting hole 551. It is to be understood that in other embodiments not shown, the connecting hole 551 may be disposed on the second leg 52 or both of the first leg 51 and the second leg 52, which is not limited in the present disclosure.

[0178] Further, as shown in FIG. 20, the footrest operating member 82 is operably disposed on the footrest 7. The footrest operating member 82 includes a footrest operating portion 821. A part of the footrest operating member 82 is received in the receiving cavity 71 and is connected to the footrest 7 to drive the footrest connecting member 81 to move between the footrest locking position and the footrest unlocking position. A bottom wall of the receiving cavity 71 is provided with an operating port 73 in communication with the receiving cavity 71. The footrest operating portion 821 of the footrest operating member 82 extends out of the receiving cavity 71 through the operating port 73 and is movable along the operating port 73. The footrest operating portion 821 can abut against an end of the operating port 73 to limit the movement stroke of the footrest operating member 82. In this embodiment, a movement direction of the footrest operating member 82 is substantially parallel to a movement direction of the footrest connecting member 81. FIG. 36 and FIG. 37 are schematic structural views of a footrest 7 and a footrest connecting mechanism 8 according to some other embodiments of the present disclosure. The footrest 7 and the footrest connecting mechanism 8 in those embodiments mainly have the following differences from the footrest 7and the footrest connecting mechanism 8 in the above embodiments.

[0179] As shown in FIG. 36, the footrest 7 is detachably connected between two support legs 5 through a footrest connecting mechanism 8. In this embodiment, the child chair 100 is provided with two footrest connecting mechanisms 8, and each of two sides of the footrest 7 is connected to corresponding one of the two front support legs 5 a through corresponding one of the two footrest connecting mechanisms 8.

[0180] Referring to FIG. 37 together, the footrest 7 includes an upper housing 74 and a lower housing 75. The upper housing 74 is detachably connected to the lower housing 75. The upper housing 74 is formed with a footrest face of the footrest 7. The footrest connecting mechanism 8 includes a footrest connecting member 81. The footrest connecting member 81 is in a shape of a sheet. The footrest connecting member 81 includes a first part 814 and a second part 815. The first part 814 is connected to the footrest 7. Specifically, the first part 814 is disposed between the upper housing 74 and the lower housing 75 and is connected to the upper housing 74. The second part 815 protrudes from a side of the footrest 7 and is provided with a connecting recess 8153. The connecting recess 8153 is configured to allow the second connecting member 57 to pass therethrough. The connecting recess 8153 is, for example, a through hole, a groove, or the like. The second connecting member 57 passes through the connecting recess 8153 to be connected to the first connecting member 56, thereby fixing the second part 815 between the first leg and the second leg. In this way, not only the detachable connection between the first leg 51 and the second leg 52 can be achieved, but also the footrest 7 can be detachably connected to the support leg 5 through the footrest connecting member 81.

[0181] Referring to FIG. 36, at least one of the first leg 51 and the second leg 52 is provided with a receiving groove 507 which has a shape matching with the shape of the second part 815. The receiving groove 507 is adapted to receive the second part 815 and limit the second part 815 therein. Specifically, the second part 815 is engaged with the receiving groove 507. This prevents the footrest connecting member 81 from being exposed, maintaining a tidy appearance for the child chair 100, and also prevents any shaking of the footrest connecting member 81 relative to the support leg 5. In this embodiment, the side of the footrest 7 is provided with an avoidance notch 76. The second part 815 of the footrest connecting member 81 extends towards the avoidance notch 76. The avoidance notch 76 has a curved side wall. A shape of the curved side wall of the avoidance notch 76 matches with the shape of the side face of either the first leg 51 or the second leg 52. In this way, when the footrest 7 is connected to the support leg 5, the side wall of the avoidance notch 76 can fit with the side faces of the first leg 51 and the second leg 52 to prevent the footrest connecting member 81 from being exposed, thereby making the appearance tidier and more aesthetic. In this embodiment, the second part 815 includes a circular part 8151 generally in a shape of a circle and a rectangular part 8152 generally in a shape of a rectangle. A diameter of the circular part 8151 is greater than a width of the rectangular part 8152, so that the second part 815 can be limited in the receiving groove 507.

[0182] The technical features of the above embodiments can be combined arbitrarily. In order to make thedescription concise, not all possible combinations of the technical features are described in the embodiments. However, as long as there is no contradiction in the combination of these technical features, the combinations should be considered as in the scope of the specification.

[0183] The above embodiments are only several implementations of the present disclosure, and the descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present disclosure. It should be understood by those of ordinary skill in the art that various modifications and improvements can be made without departing from the concept of the present disclosure, and all fall within the protection scope of the present disclosure. Therefore, the patent protection of the present disclosure shall be defined by the appended claims.

Claims

CLAIMS1. A backrest connecting structure for a child chair, the child chair comprising a seat body and a backrest assembly, the backrest connecting structure being configured to detachably connect the backrest assembly to the seat body, the backrest connecting structure comprising a backrest disassembly mechanism comprising: an engagement member movably disposed on the backrest assembly and having a first engagement end; and a disassembly operating member rotatably connected to the backrest assembly and drivingly connected to the engagement member, wherein the disassembly operating member is capable of being operated to rotate to cause the engagement member to move between a first backrest locking position and a first backrest unlocking position; wherein the seat body is provided with an engagement portion; wherein, when the engagement member is at the first backrest locking position, the first engagement end is capable of being engaged with the engagement portion to connect the backrest assembly to the seat body; and when the engagement member is at the first backrest unlocking position, the first engagement end is disengaged from the engagement portion to allow the backrest assembly to be detached from the seat body.

2. The backrest connecting structure according to claim 1, wherein one of the engagement member and the disassembly operating member is provided with a connecting boss, the other one of the engagement member and the disassembly operating member is provided with a connecting groove extending in a direction perpendicular to a pivot axis of the disassembly operating member, and the connecting boss is engaged into the connecting groove and slidable along the connecting groove.

3. The backrest connecting structure according to claim 2, wherein: the connecting groove is provided with an abutment portion at a groove opening thereof; and the connecting boss comprises a first cylindrical portion and a second cylindrical portion attached to an end face of the first cylindrical portion, the second cylindrical portion has a diameter greater than that of the first cylindrical portion, and the second cylindrical portion is accommodated in the connecting groove and abuts against the abutment portion.

4. The backrest connecting structure according to claim 2 or 3, wherein the engagement member comprises a first straight section, a second straight section, and a connecting section connected between the first straight section and the second straight section, the first straight section and the second straight section are parallel but not collinear to each other, and the first straight section is formed with the first engagement end.

5. The backrest connecting structure according to any one of the preceding claims, wherein the backrest disassembly mechanism comprises two engagement members, and the disassembly operating member is provided with two connecting grooves rotationally symmetrically arranged with respect to the pivot axis of the disassembly operating member.

6. The backrest connecting structure according to any one of the preceding claims, wherein the backrest disassembly mechanism further comprises a disassembly reset member adapted to bias the engagement member to move towards the first backrest locking position.

7. The backrest connecting structure according to any one of the preceding claims, wherein the disassembly operating member comprises a pivot portion with a cylindrical outer contour and a disassembly operating portion disposed on an end face of the pivot portion, and the pivot portion is pivotably connected to the backrest assembly and drivingly connected to the engagement member.

8. The backrest connecting structure according to any one of the preceding claims, further comprising a backrest adjustment mechanism comprising: an adjustment member movably disposed on the backrest assembly and having a second engagement end; wherein the seat body is provided with at least one adjustment portion; the adjustment member is movable between a second backrest locking position and a second backrest unlocking position; wherein, when the adjustment member is at the second backrest locking position, the second engagement end is capable of being engaged with one of the at least one adjustment portion; and when the adjustment member is at the second backrest unlocking position, the second engagement end is disengaged from the at least one adjustment portion; wherein, when the adjustment member is at the second backrest locking position and the engagement member is at the first backrest locking position, the backrest assembly is capable of being fixedly connected to the seat body; and when the adjustment member is at the second backrest unlocking position and the engagement member is at the first backrest unlocking position, the backrest assembly is capable of being detached from the seat body.

9. The backrest connecting structure according to claim 8, wherein a plurality of adjustment portions are provided such that an angle of the backrest assembly relative to the seat body is capable of being changed by engaging the second engagement end with different adjustment portions.

10. The backrest connecting structure according to claim 8 or 9, wherein the backrest adjustment mechanismfurther comprises: an adjustment operating member movably disposed on the backrest assembly, a movement direction of the adjustment operating member being angled relative to a movement direction of the adjustment member; and a driving member, one end of the driving member being connected to the adjustment member, and the other end of the driving member being connected to the adjustment operating member; wherein the adjustment operating member is movable between a first position and a second position to drive the adjustment member to move between the second backrest locking position and the second backrest unlocking position.

11. A child chair, comprising a seat body, a backrest assembly, and the backrest connecting structure according to any one of claims 1 to 10, wherein the backrest assembly is detachably connected to the seat body through the backrest connecting structure.

12. The child chair according to claim 11, further comprising a plurality of support legs, wherein each of the plurality of support legs is provided with a first insertion portion, the first insertion portion is provided with an elastic arm, and the elastic arm is provided with a locking protrusion thereon; wherein the seat body is provided with a plurality of second insertion portions, each of the plurality of second insertion portions is provided with an insertion hole and a locking hole, and the locking hole extends through a side wall of the insertion hole; and wherein the first insertion portion of each of the plurality of support legs is inserted into the insertion hole of corresponding one of the plurality of second insertion portions, and the locking protrusion is engaged with the locking hole.

13. The child chair according to claim 11 or 12, further comprising aplurality of support legs adapted to support the seat body, each of the plurality of support legs comprising: a first leg comprising a first connecting end and a second connecting end, the first connecting end being connected to the seat body, and the second connecting end being provided with a first connecting member; and a second leg provided with a second connecting member; wherein one of the first connecting member and the second connecting member is provided with a male thread, the other one of the first connecting member and the second connecting member is provided with a female thread, and the second connecting member is capable of being threadedly connected to the first connecting member to connect the second leg to the first leg.

14. The child chair according to claim 13, wherein at least the second connecting end of the first leg is provided with a first accommodating hole, and at least a part of the first connecting member is accommodated in the first accommodating hole; wherein at least an end of the second leg is provided with a second accommodating hole, and at least a part of the second connecting member is accommodated in the second accommodating hole; and wherein the first connecting member is provided with the female thread, and the second connecting member is provided with the male thread.

15. The child chair according to claim 14, wherein a first decorative cover is disposed on the second connecting end and engaged with the first connecting member, a part of the first decorative cover is accommodated in the first accommodating hole, and the other part of the first decorative cover extends out of the first accommodating hole and is formed with a first arc-shaped end face; and wherein the first decorative cover is provided with a first through hole for allowing the first connecting member to be connected to the second connecting member.

16. The child chair according to claim 14 or 15, wherein a second decorative cover is disposed on the second leg, the second decorative cover is accommodated in the second accommodating hole and engaged with the second connecting member, and the second decorative cover is provided with a second through hole for the second connecting member to pass therethrough to allow the second connecting member to be threadedly connected to the first connecting member.

17. The child chair according to any one of the claims 11 to 16, further comprising: a plurality of support legs adapted to support the seat body, the plurality of support legs comprising two front support legs; a footrest, at least a part of the footrest being disposed between the two front support legs; and a footrest connecting mechanism, the footrest being detachably connected to the two front support legs through the footrest connecting mechanism.

18. The child chair according to claim 17, wherein the footrest connecting mechanism comprises: a footrest connecting member movably disposed on the footrest, an end of the footrest connecting member being formed with a hook portion; wherein a corresponding one of the two front support legs is provided with a hollow cavity, and a side wall of the hollow cavity is provided with a connecting hole; andwherein the footrest connecting member is convertible between a footrest locking position and a footrest unlocking position; wherein, when the footrest connecting member is at the footrest locking position, the hook portion extends through the connecting hole and is capable of being secured by an inner side wall of the hollow cavity; and when the footrest connecting member is at the footrest unlocking position, the hook portion is detached from the connecting hole.

19. The child chair according to claim 18, wherein the footrest connecting mechanism further comprises a footrest operating member movably disposed on the footrest and connected to the footrest connecting member, and the footrest operating member comprises an operable footrest operating portion.

20. The child chair according to any one of the claims 11 to 19, further comprising a bottom cover assembly and a tray detachably connected to the seat body, wherein the child chair has multiple usage modes, and the bottom cover assembly is selectively detachably connected to one of the first leg and the tray according to the desired usage mode of the child chair.

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