Child chair and backrest connecting structure thereof

Abstract

The invention relates to a backrest connecting structure and a child chair with the backrest connecting structure. A child vehicle includes a seat body and a backrest assembly. The backrest assembly is detachably connected with the seat body through a backrest connecting structure, and the backrest connecting structure comprises a backrest dismounting mechanism. The backrest dismounting mechanism comprises a clamping piece and a dismounting operation piece. The clamping piece is movably arranged on the backrest assembly, and the clamping piece is provided with a clamping end. The dismounting operation piece is rotatably connected to the backrest assembly, the dismounting operation piece is in driving connection with the clamping piece, and the dismounting operation piece can be rotatably operated to enable the clamping piece to move between a first backrest locking position and a first backrest unlocking position. The seat body is provided with a clamping part, when the clamping piece is located at the first backrest locking position, the clamping end can be clamped with the clamping part so that the backrest assembly can be fixedly connected with the seat body, and when the clamping piece is located at the first backrest unlocking position, the clamping end and the clamping part are released so that the backrest assembly can be separated from the seat body.

Description

Technical Field

[0001] The present invention relates to the technical field of children's products, and in particular to a children's chair with multiple usage modes and a backrest connection structure thereof. Background Art

[0002] Children's dining chairs can provide convenience for children to dine at the same table with adults, so that children can also integrate well into the dining atmosphere. The current children's dining chairs generally have a single function, which cannot be well adapted to the needs of children of different ages, nor can they meet the needs of use in different scenarios. Existing children's high chairs usually have a short use cycle and a low utilization rate. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a backrest connection structure that can easily disassemble the backrest and a children's chair having the backrest connection structure.

[0004] According to one aspect of the present application, a backrest connection structure is provided, which is used for a child seat. The child carrier includes a seat body and a backrest assembly. The backrest assembly is detachably connected to the seat body through the backrest connection structure, and the backrest connection structure includes a backrest disassembly mechanism. The backrest disassembly mechanism includes: a clamping member and a disassembly operating member.

[0005] The engaging member is movably arranged on the backrest assembly, and the engaging member has an engaging end.

[0006] The disassembly operating member is rotatably connected to the backrest assembly, and the disassembly operating member is drivingly connected to the engaging member. The disassembly operating member can be rotatably operated to move the engaging member between a first backrest locking position and a first backrest releasing position.

[0007] The seat body is provided with a clamping part. When the clamping part is located at the first backrest locking position, the clamping end can be clamped with the clamping part to connect the backrest assembly with the seat body. When the clamping part is located at the first backrest releasing position, the clamping end is disengaged from the clamping part to allow the backrest assembly to be separated from the seat body.

[0008] Furthermore, one of the engaging member and the disassembly operating member is provided with a connecting boss, and the other of the disassembly operating member and the disassembly operating member is provided with a connecting groove, the extension direction of the connecting groove is perpendicular to the pivot axis of the disassembly operating member, the connecting boss is engaged with the connecting groove, and can slide along the connecting groove.

[0009] Furthermore, an abutment portion is provided at the notch of the connecting groove.

[0010] The connecting boss includes a first column part and a second column part connected to the end surface of the first column part. The diameter of the second column part is greater than that of the first column part. The second column part is accommodated in the connecting groove and abuts against the abutting part.

[0011] Furthermore, the engaging member includes a first straight section, a second straight section, and a connecting section connected to the first straight section and the second straight section. The first straight section is parallel to the second straight section but not colinear, and the first straight section forms the engaging end.

[0012] Further, the backrest disassembly mechanism is configured with two engaging members, and the disassembly operating member is provided with two connecting grooves, and the two connecting grooves are symmetrically distributed about the pivot axis of the disassembly operating member.

[0013] Furthermore, the backrest disassembly mechanism further comprises a disassembly restoring member, wherein the restoring member is adapted to bias the engaging member so as to move the engaging member toward the first backrest locking position.

[0014] Furthermore, the backrest assembly is provided with a first limiting groove suitable for accommodating the disassembly and restoration member, and the engaging member is provided with a limiting protrusion.

[0015] The engaging member is at least partially accommodated in the first limiting groove, one end of the disassembly and reset member abuts against the limiting protrusion, and the other end of the disassembly and reset member abuts against the side wall of the first limiting groove.

[0016] Furthermore, the backrest assembly includes a backrest body and a backrest decorative cover, the backrest body and the backrest decorative cover enclose a accommodating cavity, the backrest assembly is provided with a first outlet hole connected to the accommodating cavity, at least a portion of the engaging member is accommodated in the accommodating cavity, and the engaging end can at least partially extend out of the accommodating cavity through the first outlet hole to engage with the engaging portion.

[0017] Furthermore, the backrest assembly includes a backrest body and a backrest decorative cover, the backrest body and the backrest decorative cover enclose a receiving cavity, the backrest decorative cover is provided with an operating through hole connected to the receiving cavity, and the disassembly operating member is pivotally connected to the backrest body through the operating through hole.

[0018] Furthermore, a retaining protrusion is provided on the wall of the operating through hole, and a retaining recess suitable for engaging with the retaining protrusion is provided on the disassembly operating member;

[0019] Alternatively, a retaining recess is provided on the hole wall of the operating through hole, and a retaining protrusion suitable for engaging with the retaining recess is provided on the disassembly operating member.

[0020] Furthermore, the disassembly operating member is provided with a raised portion, the raised portion smoothly transitions with the side surface of the disassembly operating member, and the retaining recess is formed on the raised portion.

[0021] Furthermore, the disassembly operating member includes a pivoting portion with a cylindrical outer contour and a disassembly operating portion arranged on an end surface of the pivoting portion, and the pivoting portion is pivotally connected to the backrest assembly and drivingly connected to the engaging member.

[0022] Furthermore, the backrest connection structure also includes a backrest adjustment mechanism, and the backrest adjustment mechanism includes an adjustment member.

[0023] The adjusting member is movably arranged on the backrest assembly, and the adjusting member has a clamping end.

[0024] At least one adjustment part is provided on the seat body, and the adjustment part can move between a second backrest locking position and a second backrest unlocking position. When the adjustment part is located at the second backrest locking position, the clamping end can be engaged with one of the adjustment parts. When the adjustment part is located at the second backrest unlocking position, the clamping end is released from the adjustment part.

[0025] When the adjustment member is located at the second backrest locking position and the engaging member is located at the first backrest locking position, the backrest can be fixedly connected to the seat body; when the adjustment member is located at the second backrest releasing position and the engaging member is located at the first backrest releasing position, the backrest assembly can be separated from the seat body.

[0026] Furthermore, there are multiple adjusting parts, so as to allow the angle of the backrest assembly relative to the seat body to be changed by engaging the clamping end with different adjusting parts.

[0027] Furthermore, the backrest adjustment mechanism also includes an adjustment operating member and a driving member.

[0028] The adjustment operating member is movably arranged on the backrest assembly, and the moving direction of the adjustment operating member forms an angle with the moving direction of the adjustment member.

[0029] One end of the driving member is connected to the adjusting member, and the other end of the driving member is connected to the adjusting operating member.

[0030] The adjustment operating member can move between a first position and a second position to drive the adjustment member to move between an adjustment locking position and an adjustment releasing position.

[0031] Furthermore, the backrest assembly includes a backrest body and a backrest decorative cover, the backrest body and the backrest decorative cover enclose a accommodating cavity, the backrest assembly is provided with a second outlet hole connected to the accommodating cavity, at least a portion of the adjustment member is accommodated in the accommodating cavity, and the clamping end can extend out of the accommodating cavity through the second outlet hole.

[0032] One end of the driving member is accommodated in the accommodating cavity and connected to the adjusting member, and the other end of the driving member extends out of the accommodating cavity and is connected to the adjusting operating member.

[0033] Furthermore, the backrest adjustment mechanism further comprises a first backrest restoring member, and the first backrest restoring member is adapted to bias the adjustment operating member to move to the first position.

[0034] According to another aspect of the present application, a child chair is provided, which comprises a seat body, a backrest assembly and a backrest connection structure in any of the above embodiments, wherein the backrest assembly is detachably connected to the seat body through the backrest connection structure.

[0035] Furthermore, the child chair also includes a plurality of supporting legs, each supporting leg having a first plug-in portion, the first plug-in portion being provided with an elastic arm, and the elastic arm being provided with a locking protrusion.

[0036] The seat body is provided with a plurality of second plug-in parts, each of which is provided with a plug-in hole and a locking hole, and the locking hole penetrates the side wall of the plug-in hole.

[0037] The first plug-in parts of the plurality of supporting legs are respectively plugged into the plurality of plug-in holes, and the locking protrusions are engaged with the locking holes.

[0038] Furthermore, each plug hole has a first end surface, and an angle between a plane where the first end surface is located and an extension direction D5 of the plug hole is greater than 90°.

[0039] Each supporting foot is provided with a second end surface, and the angle between the plane where the second end surface is located and the extension direction D6 of the first plug-in portion is greater than 90°.

[0040] When the first plug-in portion is plugged into the plug-in hole, the second end surface abuts against the first end surface.

[0041] Furthermore, the child chair also includes a plurality of supporting legs adapted to support the seat body, and each supporting leg includes a first supporting leg and a second supporting leg.

[0042] The first supporting leg comprises a first connecting end and a second connecting end, the first connecting end is connected to the seat body, and the second connecting end is provided with a first connecting piece.

[0043] The second supporting leg is provided with a second connecting member.

[0044] One of the first leg and the second leg is provided with a male thread, the other of the first leg and the second leg is provided with a female thread, and the second connecting member can be threadedly connected to the first connecting member to connect the second leg to the first leg.

[0045] Furthermore, at least the second connecting end of the first supporting leg has a first accommodating hole, and at least a portion of the first connecting member is accommodated in the first accommodating hole.

[0046] At least one end of the second leg has a second receiving hole, and at least a portion of the second connecting member is received in the second receiving hole.

[0047] The first connecting member is provided with a female thread, and the second connecting member is provided with a male thread.

[0048] Furthermore, the second connecting end is provided with a first decorative cover which is clamped with the first connecting member, a part of the decorative cover is accommodated in the first accommodating hole, and another part of the first decorative cover extends out of the first accommodating hole and forms a first arc-shaped end surface.

[0049] The first decorative cover is provided with a first through hole to allow the female thread of the first connecting member to be connected with the male thread of the second connecting member.

[0050] Further, when the first supporting leg is connected to the second supporting leg, the first arc-shaped end surface of the first decorative cover extending out of the first receiving hole can be received in the second receiving hole of the second supporting leg.

[0051] Further, the first connecting member includes a first connecting portion and a first threaded portion.

[0052] The first connecting portion is connected to the inner side wall of the first accommodating hole.

[0053] The first threaded portion is provided with a female thread.

[0054] At least a part of the first threaded portion is inserted into the first through hole, a first concave portion is provided on a side surface of the first threaded portion, a first convex portion is provided on a side wall of the first through hole, and the first convex portion is engaged with the first concave portion.

[0055] Further, one of the first connection portion and the first decorative cover is provided with a second convex portion, and the other of the first connection portion and the first decorative cover is provided with a second concave portion, and the second convex portion is engaged with the second concave portion.

[0056] Furthermore, the second support leg is provided with a second decorative cover, which is accommodated in the second accommodating hole and clamped with the second connecting member. The second decorative cover is provided with a second through hole suitable for the second connecting member to pass through, so as to allow the second connecting member to be threadedly connected to the first connecting member.

[0057] Furthermore, the second decorative cover is provided with a snap-fit ​​finger, the end of the snap-fit ​​finger forms a snap-fit ​​hook, the second connecting member is provided with a snap-fit ​​through-hole, the snap-fit ​​hook passes through the snap-fit ​​through-hole and abuts against the end surface of the snap-fit ​​through-hole.

[0058] Furthermore, the children's chair also includes a dining tray detachably connected to the seat body, and the dining tray is provided with a support leg connecting portion for detachably connecting to the supporting leg.

[0059] One of the support leg connection part and the second support leg is provided with a male thread, the other of the support leg connection part and the second support leg is provided with a female thread, and the second support leg can be threadedly connected with the support leg connection part.

[0060] Furthermore, the children's chair also includes a plurality of supporting feet, a footrest member and a footrest connecting mechanism.

[0061] A plurality of supporting feet are adapted to support the seat body, and the plurality of supporting feet include two front supporting feet.

[0062] At least a portion of the footrest is disposed between the two front supporting feet.

[0063] Pedal connecting mechanism The pedal member is detachably connected to the two front supporting feet through the pedal connecting mechanism.

[0064] Furthermore, the pedal connection mechanism includes a pedal connection member.

[0065] The pedal connecting piece is movably arranged on the pedal piece, and a hook portion is formed at the end of the pedal piece.

[0066] The corresponding front supporting foot is provided with a hollow cavity, and the side wall of the hollow cavity is provided with a connecting hole.

[0067] The pedal connector can switch between a pedal locking position and a pedal unlocking position. When the pedal connector is in the pedal locking position, the hook portion passes through the connecting hole and can be stopped by the inner wall of the hollow cavity. When the pedal connector is in the pedal unlocking position, the hook portion disengages from the connecting hole.

[0068] Furthermore, the pedal connection mechanism also includes a pedal operating member, which is movably arranged on the pedal member and connected to the pedal connection member, and the pedal operating member includes an operable pedal operating portion.

[0069] Furthermore, the pedal member is provided with a containing cavity, the side wall of the containing cavity is provided with a through hole, and the bottom wall of the containing cavity is provided with an operation port.

[0070] A part of the pedal operating member is accommodated in the accommodation cavity, the pedal operating part extends out of the accommodation cavity through the operating opening, the pedal connecting member is connected to the pedal operating member, and the hook part can extend out of the accommodation cavity through the through opening.

[0071] Furthermore, the pedal connection mechanism also includes a pedal resetting member.

[0072] The pedal reset member is adapted to bias the pedal operating member to drive the pedal connecting member to move toward the pedal locking position.

[0073] Furthermore, the supporting leg includes a first supporting leg and a second supporting leg, the first supporting leg is provided with a first connecting member, and the second supporting leg is provided with a second connecting member.

[0074] The pedal connection mechanism comprises a pedal connection member, the pedal connection member comprises a first part and a second part, the first part is connected to the pedal member, and the second part is provided with a connection recess.

[0075] The second connecting member is connected to the first connecting member through the connecting recess, so that the first supporting leg is connected to the second supporting leg, and the second part is limited between the first supporting leg and the second supporting leg.

[0076] Furthermore, the supporting leg includes a first supporting leg and a second supporting leg detachably connected to the first supporting leg.

[0077] The pedal connection mechanism includes a pedal connection member, which includes a first part and a second part. The first part is connected to the pedal member, and at least one of the first leg and the second leg is provided with a retaining groove, the shape of which matches the shape of the second part, and the retaining groove is suitable for accommodating the second part and limiting the second part therein.

[0078] Furthermore, the children's chair also includes a bottom cover assembly and a dining tray detachably connected to the seat body. The children's chair has multiple usage modes, and the bottom cover assembly is selectively detachably connected to one of the first leg and the dining tray according to the usage mode of the children's chair.

[0079] Furthermore, the first connecting member is provided with a female thread, and the bottom cover assembly includes: a cover body and a fourth connecting member.

[0080] The cover body has a curved surface, and the curved surface is suitable for contacting with the ground.

[0081] The fourth connecting member is connected to the cover body and is provided with a male thread matching the female thread of the first connecting member.

[0082] The dining tray has a support leg connecting portion, and the support leg connecting portion is provided with a female thread matching the male thread of the fourth connecting member.

[0083] The fourth connecting member is selectively threadedly connected to one of the leg connecting portion and the first connecting member.

[0084] Furthermore, the leg connecting portion is provided with a receiving groove, and the receiving groove is located at the lower end surface of the dinner plate.

[0085] In a use mode in which the dinner plate 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.

[0086] According to the chair with a backrest connection structure and a child chair with the backrest connection structure provided in the embodiment of the present application, the disassembly engaging member is driven to move between a disassembly locking position and a disassembly releasing position by rotating the disassembly operating member to allow the backrest assembly to be connected or separated from the seat body, thereby realizing quick connection and quick disassembly between the backrest assembly and the seat body, so that the child chair can meet the use requirements in different modes. The backrest connection structure of this embodiment is simple in structure and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0087] Figure 1 A schematic diagram showing the structure of a children's chair according to some embodiments of the present application;

[0088] Figure 2 An exploded view showing a children's chair according to some embodiments of the present application;

[0089] Figure 3A schematic diagram showing the structure of a backrest assembly according to some embodiments of the present application, wherein the backrest decorative cover is removed;

[0090] Figure 4 An exploded view of a backrest assembly according to some embodiments of the present application is shown, wherein the backrest disassembly mechanism is in a locked state;

[0091] Figure 5 An exploded view of a backrest assembly according to some embodiments of the present application is shown, wherein the backrest disassembly mechanism is in a released state;

[0092] Figure 6 Show Figure 2 A cross-sectional view of a backrest assembly of a child chair along AA;

[0093] Figure 7 A schematic diagram showing the structure of a backrest disassembly mechanism according to some embodiments of the present application;

[0094] Figure 8 A schematic diagram showing the structure of a clamping member according to some embodiments of the present application is shown;

[0095] Fig. 9 A schematic diagram showing the structure of a disassembly operating member according to some embodiments of the present application;

[0096] Fig.10 A schematic diagram showing the structure of a child chair according to some embodiments of the present application at another viewing angle, wherein the child chair is in a first usage mode;

[0097] Fig.11 Show Fig.10 A schematic diagram of the structure of the child chair in the second use mode;

[0098] Fig.12 Show Fig.10 A schematic diagram of the structure of the child chair in a third usage mode;

[0099] Fig.13 Show Fig.10 A cross-sectional view of a child chair in FIG.

[0100] Fig.14 Show Fig.10 An exploded view of a children's chair in

[0101] Fig.15 Show Fig.13 The enlarged view of point B in the middle;

[0102] Fig.16 A schematic diagram showing the structure of a second support leg according to some embodiments of the present application is shown;

[0103] Fig.17 Show Fig.16A cross-sectional view of the second leg along CC;

[0104] Fig.18 A cross-sectional view showing a second leg of a children's chair according to some embodiments of the present application being connected to a dining tray in a third usage mode;

[0105] Fig.19 An exploded view showing a children's chair according to some embodiments of the present application;

[0106] Fig. 20 A cross-sectional view showing a child chair at a footrest connection mechanism according to some embodiments of the present application; and

[0107] Fig.21 A schematic diagram showing the structure of a pedal connection mechanism according to some embodiments of the present application Fig. 22 A schematic diagram showing the structure of a children's chair in a first usage mode according to some other embodiments of the present application;

[0108] Fig.23 Show Fig. 22 A schematic diagram of the structure of the child chair in a third usage mode;

[0109] Fig.24 Show Fig. 22 A schematic diagram of the structure of the child chair in another perspective, wherein the footrest is removed;

[0110] Fig.25 Show Fig.24 A cross-sectional view of the child chair along EE;

[0111] Fig.26 Show Fig.24 An exploded view of a children's chair in

[0112] Fig. 27 A schematic diagram showing the structure of a first connecting member of a children's chair according to other embodiments of the present application;

[0113] Fig.28 A schematic diagram showing the structure of a second connecting member of a children's chair according to other embodiments of the present application;

[0114] Fig.29 Show Fig.23 A cross-sectional view of the child chair along FF;

[0115] Fig.30 A bottom view of a dining tray of a children's chair according to some other embodiments of the present application is shown;

[0116] Fig.31 Show Fig.30 A cross-sectional view of the dinner plate along HH;

[0117] Fig.32 Show Fig.30 An exploded view of the dinner plate in

[0118] Fig.33 Show Fig.32 A schematic structural diagram of a cover body of a mid-bottom cover assembly;

[0119] Fig.34 Show Fig.32 A schematic structural diagram of a fourth connecting member of the mid-bottom cover assembly;

[0120] Fig.35 Show Fig.23 A cross-sectional view of the child chair along GG;

[0121] Fig.36 Show Fig. 22 An exploded view of the child chair in Fig.37 Show Fig.36 Exploded view of the footrest in Figure 1.

[0122] Reference numerals

[0123] 100. Children's chairs,

[0124] 1. seat body, 11. seat portion, 12. seat side portion, 13. engaging portion, 14. adjusting portion, 15. plug-in hole, 151. first end surface, 152. locking hole, 16. second plug-in portion,

[0125] 2. backrest assembly, 21. backrest body, 211. perforation, 212. concave portion, 213. backrest bottom, 214. backrest side, 215. limiting plate portion, 216. first limiting convex portion, 2161. first limiting groove, 2162. first penetration, 217. second limiting convex portion, 2171. second limiting groove, 2172. second penetration,

[0126] 22. Back cover, 23. Accommodating cavity, 24. Operation through hole, 241. Retaining convex, 25. First through hole, 26. Second through hole,

[0127] 300, back connection structure,

[0128] 3. Back-rest disassembly mechanism, 31. Clamping member, 311. Clamping end, 312. Connecting boss, 3121. First column portion, 3122. Second column portion, 315. First straight section, 316. Second straight section, 317. Connecting section, 318. Position-limiting protrusion,

[0129] 32. disassembly operating member, 321. pivoting portion, 322. disassembly operating portion, 323. connecting groove, 3233. notch, 3234. abutting portion, 324. raised portion, 325. retaining recess, 326. pin,

[0130] 33. Remove the reset parts.

[0131] 4. backrest adjustment mechanism, 41. adjustment member, 411. clamping end, 42. adjustment operating member, 43. driving member, 431. driving cable, 432. connecting terminal, 44. first adjustment reset member, 45. second adjustment reset member,

[0132] 5. Supporting foot, 5a. Front supporting foot, 5b. Rear supporting foot, 501. First tube, 502. Second tube, 503. Supporting foot body, 504. Connecting seat, 505. Avoidance groove, 506. Connecting mechanism, 507. Retaining groove,

[0133] 51. first leg, 511. first receiving hole, 512. elastic arm, 513. locking protrusion, 514. first connecting end, 515. second connecting end, 516. second end surface, 517. first main body,

[0134] 52. second leg, 521. second receiving hole, 522. second main body, 53. first plug-in portion, 54. foot pad, 55. hollow cavity, 551. connecting hole,

[0135] 56. first connecting member, 561. first connecting portion, 562. first threaded portion, 563. first recess, 564. second recess, 565. first threaded hole,

[0136] 57. second connecting member, 571. engaging through hole, 572. second connecting portion, 573. second threaded portion, 574. first connecting section, 575. second connecting section,

[0137] 58, first decorative cover, 581, first through hole, 582, first arc-shaped end surface, 583, first convex portion, 584, second concave portion,

[0138] 59, second decorative cover, 591, second through hole, 592, snap-fit ​​finger, 5921, snap-fit ​​hook, 593, plug-in column, 594, arc-shaped concave surface,

[0139] 6. dining plate, 61. support leg connection portion, 611. third receiving hole, 612. third connecting member, 613. second arc-shaped end surface, 614. plug-in recess, 62. upper end surface, 63. lower end surface, 64. receiving groove,

[0140] 7. pedal member, 71. accommodation cavity, 72. through-port, 73. operation port, 74. upper shell, 75. lower shell, 76. avoidance recess,

[0141] 8. pedal connection mechanism, 81. pedal connection member, 811. hook portion, 814. first portion, 815. second portion, 8151. circular portion, 8152. rectangular portion, 8153. connection recess,

[0142] 82. Foot pedal operating member, 821. Foot pedal operating unit, 83. Foot pedal reset member,

[0143] 9. Bottom cover assembly, 91. Cover body, 911. Curved surface, 912. Abutting end surface, 913. Fixing hole, 92. Fourth connecting member, 921. Fourth threaded portion, 922. Fourth connecting portion,

[0144] R, pivot axis, D1, extension direction of the connecting groove, D2, moving direction of the engaging member, D3, moving direction of the adjusting member, D4, moving direction of the adjusting operating member, D5, extension direction of the plug-in hole, D6, extension direction of the first plug-in portion. DETAILED DESCRIPTION

[0145] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0146] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0147] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0148] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0149] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0150] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0151] Figure 1 and Figure 2Schematic diagrams of the structures of a child chair 100 provided according to some embodiments of the present invention are respectively shown. The child chair 100 includes a seat body 1, a backrest assembly 2, a plurality of support legs 5 for supporting the seat body 1, and a dining tray 6. The backrest assembly 2 is detachably connected to the seat body 1 through a backrest connection structure 300 to allow the child chair 100 to meet different usage requirements. The seat body 1 includes a seat portion 11 and two seat side portions 12 connected to both sides of the seat portion 11. The backrest assembly 2 is respectively connected to the two seat side portions 12 of the seat body 1 through the backrest connection structure 300.

[0152] Figures 3 to 6 The structural schematic diagrams of the backrest assembly provided according to some embodiments of the present invention are respectively shown. 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 are enclosed to form a receiving cavity 23. The backrest connection structure 300 can be at least partially received in the receiving cavity 23. The backrest body 21 includes a backrest bottom 213 and a backrest side portion 214 arranged around the backrest bottom 213. A limiting plate portion 215 is arranged on the backrest bottom 213. The backrest decorative cover 22 is respectively buckled with the backrest side portion 214 and the limiting plate portion 215 and connected by fasteners to form the receiving cavity 23. The backrest side portion 214 forms the side of the backrest assembly 2.

[0153] like Figure 3 As shown, the backrest connection structure 300 includes a backrest disassembly mechanism 3 and a backrest adjustment mechanism 4. Among them, the backrest disassembly mechanism 3 includes a snap-fitting member 31, a disassembly operating member 32 and a disassembly reset member 33. The snap-fitting member 31 is arranged on the backrest assembly 2 and can move between a first backrest locking position and a first backrest release position. The disassembly operating member 32 is rotatably connected to the backrest assembly 2 and is drivingly connected to the snap-fitting member 31, and the disassembly operating member 32 can be operated to drive the snap-fitting member 31 to move between the first backrest locking position and the first backrest release position. The moving direction D2 of the snap-fitting member 31 is substantially perpendicular to the pivot axis R of the disassembly operating member. The disassembly reset member 33 is suitable for biasing the snap-fitting member 31 so that the snap-fitting member 31 moves toward the first backrest locking position. The snap-fitting member 31 has a snap-fitting end 311. Combined with reference Figure 2The seat body 1 is provided with a snap-fitting portion 13, which can be, for example, a snap-fitting hole, a snap-fitting recess or a snap-fitting protrusion provided on the seat side portion 12 of the seat body 1. When the snap-fitting member 31 is located at the first backrest locking position, the snap-fitting end 311 can snap-fit ​​with the snap-fitting portion 13 to allow the backrest assembly 2 to be connected to the seat body 1. When the snap-fitting member 31 is located at the first backrest unlocking position, the snap-fitting end 311 is released from the snap-fitting portion 13 to allow the backrest assembly 2 to be separated from the seat body 1. The backrest connection structure 300 of this embodiment drives the disassembly snap-fitting member 31 to move between the disassembly locking position and the disassembly unlocking position by rotating the disassembly operating member 32 to allow the backrest assembly 2 to be connected or separated from the seat body. Thereby, quick connection and quick disassembly between the backrest assembly 2 and the seat body 1 are achieved, so that the child chair 100 can meet the use requirements in different modes. The backrest connection structure 300 of this embodiment is simple in structure and easy to operate.

[0154] Figure 7 A schematic diagram showing the structure of a backrest disassembly mechanism 3 according to some embodiments of the present invention is shown. Figure 8The structural schematic diagram of the engaging member 31 according to some embodiments of the present invention is shown. The engaging 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, and the first straight section 315 is parallel to the second straight section 316 but not colinear. In a preferred embodiment, the first straight sections 315 of the two engaging members 31 are colinear, and more preferably, the first straight sections 315 of the two engaging members 31 are colinear and coplanar with the pivot axis R. In this embodiment, the first straight section 315 is substantially parallel to the moving direction D2 of the engaging member 31. The first straight section 315 forms an engaging end 311. The first through-holes 25 communicating with the accommodating cavity 23 are provided on both sides of the backrest assembly 2. A first limiting convex portion 216 is provided on the backrest body 21, and the first limiting convex portion 216 is located in the accommodating cavity 23. The two ends of the first limiting convex portion 216 are connected to the back-supporting side portion 214 and the limiting plate portion 215, respectively. The first limiting convex portion 216 is provided with a first limiting groove 2161 that is connected to the first outlet hole 25. At least a portion of the clamping member 31 is accommodated in the accommodating chamber 23, and the clamping end 311 can at least partially extend out of the accommodating chamber 23 through the first outlet hole 25 to engage with the clamping portion 13. The side wall of the first limiting groove 2161 is provided with a first penetration port 2162 opposite to the first outlet hole 25, so as to allow the clamping member 31 to pass through the first penetration port 2162 and connect with the disassembly operating member 32. One of the clamping member 31 and the disassembly operating member 32 is provided with a connecting boss 312, and the other of the disassembly operating member 32 and the disassembly operating member 32 is provided with a connecting groove 323, so that the clamping member 31 is driven and connected with the disassembly operating member 32 by engaging the connecting boss 312 with the connecting groove 323. In this embodiment, a connecting boss 312 is provided at one end of the engaging member 31 away from the engaging end 311, and a connecting groove 323 is provided on the disassembly operating member 32. The connecting boss 312 is provided at the second straight section 316. The connecting boss 312 includes a first column portion 3121 and a second column portion 3122 connected to the end surface of the first column portion 3121, and the diameter of the second column portion 3122 is greater than the diameter of the first column portion 3121.

[0155] Fig. 9 The schematic diagram of the structure of the disassembly operation member 32 according to some embodiments of the present invention is shown. The disassembly operation member 32 includes a pivot portion 321 having a substantially cylindrical outer contour and a disassembly operation portion 322 connected to the pivot portion 321. The pivot portion 321 is pivotally connected to the backrest assembly 2. Figure 6The backrest decorative cover 22 is provided with an operation through hole 24 communicating with the accommodating cavity 23, and the disassembly operating member 32 is pivotally connected to the backrest body 21 through the operation through hole 24. At least a portion of the pivoting portion 321 is accommodated in the operation through hole 24, and at least a portion of the disassembly operating portion 322 extends out of the operation through hole 24 to facilitate the operation of the disassembly operating member 32. Among them, the pivoting portion 321 is pivotally connected to the backrest body 21 through a pin 326, and the pin 326 defines the pivot axis R of the disassembly operating member 32. Specifically, a through hole 211 suitable for the pin 326 to pass through is provided on the backrest body 21, and the end surface of the through hole 211 forms a lower concave portion 212. The disassembly operating member 32 is located on one side of the backrest body 21, and the threaded connection portion of the pin 326 passes through the through hole 211 and is connected to the disassembly operating member 32. The head of the screw 326 is accommodated in the lower concave portion 212.

[0156] Furthermore, if Figure 5 and Fig. 9 As shown, the 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 suitable for engaging with the retaining protrusion 241, so as to realize the positioning of the disassembly operating member 32. In this embodiment, the disassembly operating member 32 is positioned in the second position by the engagement of the retaining protrusion 241 with the retaining recess 325, so that the backrest disassembly mechanism 3 is locked in a released state to allow the backrest assembly 2 to be removed from the seat body 1. It should be understood that by adjusting the position and number of the retaining protrusion 241 and the retaining recess 325, the disassembly operating member 32 can be positioned in any desired position. In another embodiment not shown, the hole wall of the operating through hole 24 can also be provided with a retaining recess 325, and the disassembly operating member 32 can be provided with a retaining protrusion 241 suitable for engaging with the retaining recess 325, and this application does not limit this. Refer to Figure 5 and Fig. 9 , the disassembly operation member 32 is provided with a protrusion 324, the protrusion 324 and the side of the disassembly operation member 32 are smoothly transitioned, and the retaining recess 325 is formed on the protrusion 324. By arranging the retaining recess 325 on the protrusion 324, the engagement depth between the retaining protrusion 241 and the retaining recess is increased, so that the engagement between the retaining protrusion 241 and the retaining recess 325 is more stable. In the present embodiment, the number of retaining protrusions 241 is two, and the two retaining protrusions 241 are rotationally symmetrically distributed about the rotation axis R. The number of retaining recesses 325 is two, and the two retaining recesses 325 are rotationally symmetrically distributed about the rotation axis R. Optionally, the number of retaining recesses 325 is four, six, etc., wherein the number of retaining recesses 325 is a multiple of the number of retaining protrusions 241. In other embodiments not shown, the number of retaining protrusions 241 can be one, three, etc., which is not limited by the present application.

[0157] like Figure 7 , Fig. 9As shown, the disassembly operation member 32 is provided with a connection groove 323, the extension direction D1 of the connection groove 323 is perpendicular to the pivot axis R of the disassembly operation member 32, and the connection boss 312 is engaged with the connection groove 323 and can slide along the connection groove 323. Specifically, the connection groove 323 has a notch 3233, and an abutment portion 3234 is provided at the notch 3233 of the connection groove 323. The second column portion 3122 is accommodated in the connection groove 323 and can abut with the abutment portion 3234 to prevent the connection boss 312 from coming out of the connection groove 323. In this embodiment, the end of the connection groove 323 away from the pivot axis R is an open end to allow the second column portion 3122 of the connection boss 312 to be engaged in the connection groove 323 via the open end; in other embodiments, the end of the connection groove 323 away from the pivot axis R can also be a closed end, and the second column portion 3122 is connected to the groove 323 in other ways. In this embodiment, the number of the engaging members 31 is two, and the number of the connecting grooves 323 is two. The two connecting grooves 323 are rotationally symmetrically distributed about the pivot axis R. Figure 4 When the backrest disassembly mechanism 3 is in the locked state, the extending direction of the connecting groove 323 is substantially perpendicular to the moving direction D2 of the engaging member 31. Figure 5 When the backrest disassembly mechanism 3 is in the unlocked state, the extension direction of the connecting groove 323 is not perpendicular to the moving direction D2 of the engaging member 31. In the direction parallel to the moving direction D2 of the engaging member 31, the pivot axis R is located between the engaging end 311 of the engaging member 31 and the connecting boss 312.

[0158] Furthermore, if Figure 3 , Figure 7 As shown, the disassembly reset member 33 is arranged between the engaging 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 engaging member 31 forms a limiting protrusion 318. That is, the end surface of the engaging end 311 facing the second straight section 316 forms a limiting protrusion 318. The disassembly reset member 33 is sleeved on the engaging member 31. One end of the disassembly reset member 33 abuts against the limiting protrusion 318, and the other end of the disassembly reset member 33 abuts against the side wall of the first limiting groove 2161. The disassembly reset member 33 biases the engaging member 31, so that when the disassembly operating member 32 is not operated, the elastic restoring force of the disassembly reset member 33 can keep the engaging member 31 in the first backrest locking position, so that the engaging member 31 can remain engaged with the engaging portion 13.

[0159] The principle of switching between the unlocked state and the locked state of the backrest disassembly mechanism 3 in this embodiment is described in detail below. Figure 4 The backrest disassembly mechanism disposed on one side of the backrest assembly 2 is taken as an example for explanation.

[0160] When the backrest disassembly mechanism 3 is in the Figure 4 When in the locked state shown in the figure, the disassembly operating member 32 is rotated in the clockwise direction, and the connecting boss 312 is driven to rotate along with the disassembly operating member 32 in the clockwise direction and slide in the connecting groove 323 through the driving connection between the connecting groove 323 and the connecting boss 312, so that the engaging member 31 moves rightward along the D2 direction, so that the engaging end 311 is retracted into the first through hole 25 or the first limiting groove 2161 to disengage from the engaging portion 13. At this time, the back-supporting disassembly mechanism 3 is in the state as shown in the figure. Figure 5 The unlocked state shown in the figure. Thus, the backrest disassembly mechanism 3 is switched from the locked state to the unlocked state.

[0161] When the backrest disassembly mechanism 3 is in the Figure 5 In the unlocked state shown, the disassembly reset member 33 is in an elastic energy storage state. When the disassembly backrest disassembly mechanism 3 is not acted upon by an external force, the engaging member 31 moves leftward along the D2 direction under the elastic restoring force of the disassembly reset member 33, so that the engaging end 311 at least partially extends out of the accommodating cavity 23 through the first through hole 25 to engage with the engaging portion 13, and is driven to rotate the disassembly operating member 32 counterclockwise to the initial position through the driving connection with the connecting groove 323 and the connecting boss 312. At this time, the backrest disassembly mechanism 3 is in a state as shown in FIG. Figure 4 That is to say, when the external force is removed, the back disassembly mechanism 3 can automatically switch from the unlocked state to the locked state under the elastic restoring force of the disassembly reset member 3.

[0162] In some embodiments, Figure 3 and Figure 6 As shown, the backrest adjustment mechanism 4 includes an 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. Figure 2 , at least one adjustment portion 14 is provided on the seat body 1. The adjustment portion 14 can be, for example, an adjustment hole, an adjustment recess or an adjustment protrusion provided on the seat side portion 12 of the seat body 1. The adjustment member 41 is movably provided on the backrest assembly 2 and can be switched between a second backrest locking position and a second backrest release position. When the adjustment member 41 is located at the second backrest locking position, the clamping end 411 can be engaged with one of the adjustment portions 14. When the adjustment member 41 is located at the second backrest release position, the clamping end 411 is disengaged from the adjustment portion 14. In this embodiment, when the adjustment member 41 is located at the second backrest locking position and the clamping member 31 is located at the first backrest locking position, the backrest can be fixedly connected to the seat body 1. When the adjustment member 41 is located at the second backrest release position and the clamping member 31 is located at the first backrest release position, the backrest assembly 2 can be separated from the seat body 1.

[0163] In some embodiments, Figure 2As shown, the number of the adjustment parts 14 is multiple, for example, two, three, four, etc. The multiple adjustment parts 14 are arranged on the seat side part 12 of the seat body 1, and each seat side part 12 is provided with multiple adjustment parts 14. When the adjustment member 41 is engaged with different adjustment parts 14, the backrest assembly 2 can be locked at different angles, that is, the relative angle between the backrest assembly 2 and the seat part 11 of the seat body 1 can be changed by engaging the adjustment member 41 with different adjustment parts 14. For ease of description, the multiple adjustment parts 14 located on one of the seat side parts 12 of the seat body 1 are taken as an example for explanation. The multiple adjustment parts 14 are located above the engaging part 13, and the multiple adjustment parts 14 are distributed along an arc with the engaging part 13 as the center and the distance between the engaging member 31 and the adjustment part 41 as the radius.

[0164] In this embodiment, the backrest assembly 2 can be fixedly connected to the seat body 1 through the cooperation of the backrest disassembly mechanism 3 and the backrest adjustment mechanism 4, so as to avoid the angle of the backrest assembly 2 changing during use. Specifically, the backrest disassembly mechanism 3 and the backrest adjustment mechanism 4 in this embodiment 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 respectively connected to the two seat side portions 12 of the seat body 1 through the engaging member 31 of the backrest disassembly mechanism 3, thereby providing at least two connection points for the seat body 1 and the backrest assembly 2, and the adjustment member 41 of the backrest adjustment mechanism 4 of the backrest assembly 2 is connected to one or two side portions 12 of the seat body 1, thereby providing at least one connection point for the seat body 1 and the backrest assembly 2. For another example, the backrest assembly 2 is connected to a seat side portion 12 of the seat body 1 through the engaging member 31 of the backrest disassembly mechanism 3, thereby providing at least one connection point for the seat body 1 and the backrest assembly 2, and the adjusting member 41 of the backrest adjustment mechanism 4 of the backrest assembly 2 is connected to the two side portions 12 of the seat body 1, thereby providing at least two connection points for the seat body 1 and the backrest assembly 2. It should be noted that the fixed connection refers to the non-movable connection between the backrest assembly 2 and the seat body 1, that is, the backrest assembly 2 is locked at a certain angle relative to the seat portion 11, rather than the 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, for example, a part of the backrest assembly 2 may be connected to the seat portion 11 of the seat body 1, and the backrest assembly 2 may be connected to the seat side portion 12 of the seat body 1 through the backrest disassembly mechanism 3, thereby realizing the fixed connection between the backrest assembly 2 and the seat body 1. In some other embodiments, at least three connection points can be formed between the backrest assembly 2 and the seat body 1 through the backrest disassembly mechanism 3, thereby achieving fixed connection between the backrest assembly 2 and the seat body 1.

[0165] like Figure 3As shown, the adjusting member 41 is pin-shaped, one end of the adjusting member 41 is connected to the driving member 43, and the other end of the adjusting member 41 forms a clamping end 411. The moving direction D3 of the adjusting member 41 is roughly parallel to the moving direction D2 of the clamping member 31. The side of the backrest assembly 2 is provided with a second through hole 26 suitable for the adjusting member 41 to pass through. Specifically, the second through hole 26 is provided through the backrest side portion 214 of the backrest body 21. A second limiting protrusion 217 is provided on the backrest body 21. The second limiting protrusion 217 is at least partially accommodated in the accommodating cavity 23, and its two ends are respectively connected to the backrest side portion 214 and the limiting plate portion 215. The second limiting protrusion 217 is provided with a second limiting groove 2171 connected to the second through hole 26. The adjusting 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 through hole 26. A second opening 2172 is disposed on the side wall of the second limiting groove 2171 to allow the driving member 43 to be connected to the adjusting member 41 .

[0166] like Figure 3 As shown, 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 located at the first position, the adjustment member 41 is located at the second backrest locking position, and the backrest adjustment mechanism 4 is in a locked state; when the adjustment operating member 42 is located at the second position, the adjustment member 41 is located at the second backrest unlocking position, and the backrest adjustment mechanism 4 is in an unlocked state. The moving direction D4 of the adjustment operating member 42 is substantially perpendicular to the moving 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.

[0167] Furthermore, if Figure 3 As shown, the driving member 43 includes a driving cable 431, one end of the driving cable 431 is connected to the disassembly operating member 32, 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 cable, a carbon fiber cable, a plastic strip, etc. The driving cable 431 is slidably arranged along the limiting plate portion 215, and the limiting plate portion 215 limits and guides the sliding of the driving cable 431.

[0168] Combined with reference Figure 6The backrest adjustment mechanism 4 also includes a first adjustment reset member 44 and a second adjustment reset member 45. The first adjustment reset member 44 is suitable for biasing the adjustment operating member 42 so that the adjustment operating member 42 moves to the first position. The first adjustment reset member 44 is, for example, a compression spring. The first adjustment reset member 44 is arranged 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 suitable for biasing the adjustment member 41 so that the second adjustment reset member 45 moves to 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 on the driving member 43, and one end of the second adjustment reset member 45 abuts against the connecting terminal 432, and the other end abuts against the side wall of the second limiting groove 2171.

[0169] 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 plastic, for example. When the adjustment operating member 42 moves from the first position to the second position, the adjusting member 41 can be driven by the driving member 43 to move from the second backrest locking position to the second backrest unlocking position; when the adjustment operating member 42 moves from the second position to the first position, the adjusting member 41 can be driven by the driving member 43 to move from the second backrest unlocking position to the second backrest locking position.

[0170] Figures 10 to 12 Schematic diagrams of the structures of the children's chair 100 according to some embodiments of the present invention in different usage modes are shown respectively. Fig.10 The first usage mode is shown, i.e., the high chair mode. This mode is suitable for infants and young children from about six months to three years old to dine at the same table with adults, and the infants and young children can sit in the seating space without easily sliding off the high chair. Fig.11 The second usage mode is shown, i.e., the small dining chair mode. This mode is suitable for infants and young children aged about six months to three years old to eat. Compared with the first usage mode, the child chair 100 in this mode is shorter and occupies less space, making it easier for infants and young children to get in and out of the child chair 100 independently. Fig.12 The third use mode is shown, i.e., the child seat mode. This mode is suitable for infants or children aged about 3 to 12 years old. The child chair in this mode is not limited to being used as a dining chair, but can also be used in various occasions such as learning or playing. The child chair 100 of this embodiment has multiple use modes, which meets the use requirements in different scenarios and improves the use efficiency of the child chair.

[0171] Figures 13 to 15A schematic diagram of the structure of a child chair according to some embodiments of the present application is shown. In some embodiments, a plurality of support legs 5 are detachably connected to the seat body 1. The child chair 100 is provided with four support legs 5, and the four support legs 5 include two front support legs 5a and two rear support legs 5b. It can be understood that in other embodiments, the child chair 100 can also be provided with other numbers of support legs 5, such as three, etc., which is not limited by the present application. For ease of description, one of the support legs 5 is taken as an example for illustration.

[0172] like Fig.13 and Fig.15 As shown, the support foot 5 is a tubular structure with a hollow cavity 55. The support foot 5 includes a first tube portion 501 and a second tube portion 502. One end of the first tube portion 501 is inserted into the second tube portion 502, and the other end of the first tube portion 501 is suitable for connecting with the seat body 1. Among them, the second tube portion 502 can be made of, for example, stainless steel material, and the first tube portion 501 can be made of, for example, plastic material. In this way, the strength of the support foot 5 can be ensured, the weight of the support foot 5 can be reduced, and the appearance of the support foot 5 can be made more beautiful. The first tube portion 501 forms a first plug-in portion 53 of the support foot 5 to connect with the seat body 1. A foot pad 54 is provided at one end of the support foot 5 away from the first plug-in portion 53, so that the support foot 5 can be supported on the ground more stably. The first plug-in portion 53 of the support foot 5 is provided with an elastic arm 512, and a locking protrusion 513 is provided on the elastic arm 512. The seat body 1 is provided with a second plug-in portion 16, and the second plug-in portion 16 is provided with a plug-in hole 15 and a locking hole 152. The plug-in hole 15 is suitable for accommodating the supporting foot 5 . The locking hole 152 passes through the side wall of the plug-in hole 15 . The first plug-in portion 53 of the supporting foot 5 is plug-fitted with the plug-in hole 15 , and the locking protrusion 513 is engaged with the locking hole 152 .

[0173] Further, the plug hole 15 has a first end face 151, and the angle between the plane where the first end face 151 is located and the extension direction D5 of the plug hole 15 is greater than 90°. The support foot 5 is provided with a second end face 516, and the angle between the plane where the second end face 516 is located and the extension direction D6 of the first plug-in portion 53 is greater than 90°. The second end face 516 can be formed by the end face of the second tube portion 502, for example. When the first plug-in portion 53 is plugged into the plug hole 15, the second end face 516 and the first end face 151 abut against each other. The cooperation between the second end face 516 and the first end face 151 prevents the support foot 5 from rotating in the plug hole 15.

[0174] In some embodiments, Fig.14 and Fig.15As shown, the support leg 5 includes a first leg 51 and a second leg 52, and the first leg 51 is detachably connected to the second leg 52. By detachably connecting the first leg 51 and the second leg 52, the child chair 100 can be easily switched between the first use mode, the second use mode, and the third use mode. The first leg 51 includes a first connecting end 514 and a second connecting end 515. The first connecting end 514 is formed as a first plug-in portion 53 to connect with the seat body 1. The second connecting end 515 is provided with a first connecting member 56, and the first connecting member 56 is provided with a female thread. The second leg 52 is provided with a second connecting member 57, and the second connecting member 57 is provided with a male thread. The second connecting member 57 is threadedly connected to the first connecting member 56 through a male thread and a female thread. It can be understood that in other embodiments, the first connecting member 56 may be provided with a male thread, and the second connecting member 57 may be provided with a male thread, and this application does not limit this.

[0175] Figure 16 to Figure 17 FIG. 5 shows a schematic diagram of the structure of the first leg 51 according to some embodiments of the present application. Further, in some embodiments, as Figures 15 to 17 As shown, at least the second connection end 515 of the first leg 51 is provided with a first receiving hole 511. For example, the first leg 51 is a tubular structure having a hollow cavity 55, and the hollow cavity 55 of the first leg 51 forms the first receiving hole 511. The first connecting member 56 is accommodated in the first receiving 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 the inner wall of the first receiving hole 511, for example, the two can be connected by bonding, welding, etc. The first threaded portion 562 is provided with a female thread.

[0176] The first leg 51 is also provided with a first decorative cover 58. A portion of the first decorative cover 58 is accommodated in the first accommodation hole 511 and is engaged with the first connector 56, and another portion of the first decorative cover 58 extends out of the first accommodation hole 511 and has a first arc-shaped end surface 582. The first decorative cover 58 is provided with a first through hole 581 to allow the female thread of the first connector 56 to be connected with the male thread of the second connector 57. Specifically, the first connecting portion 561 of the first threaded portion 562 is penetrated in the first through hole 581. A first recess 563 is provided on the side of the first threaded portion 562, and a first convex portion 583 is provided on the side wall of the first through hole 581. The first convex portion 583 is engaged with the first recess 563. A second convex portion 5814 is provided at one end of the first decorative cover 58 away from the first arc-shaped end surface 582, and a second recess 564 is provided on the first connecting portion 561 of the first connector 56, and the second convex portion 5814 is engaged with the second recess 564. This arrangement can prevent the first decorative cover 58 from rotating relative to the first connecting member 56 .

[0177] like Fig.15 and Fig.18As shown, at least one end of the second leg 52 has a second receiving hole 521. For example, the second leg 52 is a tubular structure having a hollow cavity 55, and the hollow cavity 55 of the second leg 52 forms the second receiving hole 521. At least a portion of the second connecting member 57 is received in the second receiving hole 521. The second connecting member 57 is connected to the side wall of the second receiving hole 521 by, for example, welding, bonding, etc. 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 receiving hole 521.

[0178] Further, the second leg 52 is also provided with a second decorative cover 59, and the foot pad 54 is provided at one 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 receiving hole 521 and is engaged with the second connecting member 57. The second decorative cover 59 is provided with a second through hole 591 suitable for the second connecting member 57 to pass through, so as to allow the second connecting member 57 to be threadedly connected with the first connecting member 56. The second decorative cover 59 is provided with a snap-fit ​​finger 592, and the end of the snap-fit ​​finger 592 forms a snap-fit ​​hook 5921. The second connecting portion 572 of the second connecting member 57 is provided with a snap-fit ​​through hole 571, and the snap-fit ​​hook 5921 passes through the snap-fit ​​through hole 571 and abuts against the end surface of the snap-fit ​​through hole 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 receiving hole 521. The second decorative cover 59 is provided with a plug-in column 593 adapted to be plugged and matched with the first through hole 581 of the first decorative cover 58, and an arcuate concave surface 594 adapted to be matched with the first arcuate end surface 582 of the first decorative cover 58. The first plug-in portion 53 is provided with a second through hole 591, and the arcuate concave surface 594 is provided around the plug-in column 593. When the first support leg 51 is connected to the second support leg 52, the first arcuate end surface 582 can be accommodated in the second accommodation hole 521 of the second support leg 52, and the first arcuate end surface 582 of the first decorative cover 58 can be matched with the arcuate concave surface 594 of the second decorative cover 59. Figure 22 to Figure 25 The structural schematic diagram of the child chair 100 according to some other embodiments of the present application is shown. Figures 13 to 15 The supporting legs 5 of the children's chair 100 in some of the illustrated embodiments have at least the following differences.

[0179] like Fig.25As shown, in other embodiments, the support leg 5 includes a support leg body 503 and a connecting seat body 504 arranged on the support leg body 503, and the connecting seat body 504 is sleeved on the support leg body 503 for connecting with the seat body 1. The support leg body 503 can be made of, for example, wood, and the connecting seat body 504 can be made of, for example, plastic. The connecting seat body 504 forms a first plug-in portion 53 of the support leg 5 to connect with the seat body 1. A foot pad 54 is provided at one end of the support leg 5 away from the first plug-in portion 53, so that the support leg 5 can be supported on the ground more stably. The first plug-in portion 53 of the support leg 5 is provided with an elastic arm 512, which is equivalent to the connecting seat body 504 being provided with an elastic arm 512. A locking protrusion 513 is provided on the elastic arm 512. The seat body 1 is provided with a second plug-in portion 16, and the second plug-in portion 16 is provided with a plug-in hole 15 and a locking hole 152. The plug-in hole 15 is suitable for accommodating the support leg 5, the locking hole 152 penetrates the side wall of the plug-in hole 15, the first plug-in portion 53 of the support leg 5 is plugged and matched with the plug-in hole 15, and the locking protrusion 513 is engaged with the locking hole 152. In this embodiment, a part of the support leg body 503 is inserted into the connecting seat body 504 and is provided with an escape groove 505, which is directly opposite to the elastic arm 512 and its opening faces the elastic arm 512. The escape groove 505 is used to provide 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 and can also withdraw from the locking hole 152.

[0180] like Fig.25 and Fig.26 As shown, the second plug-in portion 16 has a first end face 151, and one end of the plug-in hole 15 is located at the first end face 151. The angle between the plane where the first end face 151 is located and the extension direction D5 of the plug-in hole 15 is greater than 90°. The support leg 5 is provided with a second end face 516. Specifically, the support leg body 503 forms the second end face 516, and the angle between the plane where the second end face 516 is located and the extension direction D6 of the first plug-in portion 53 is greater than 90°. When the first plug-in portion 53 is plugged and matched with the plug-in hole 15, the second end face 516 and the first end face 151 abut against each other.

[0181] like Fig.25 and Fig.26As shown, in other embodiments, the support leg 5 includes a first support leg 51 and a second support leg 52, and the first support leg 51 is detachably connected to the second support leg 52. The first support leg 51 includes a first connecting end 514 and a second connecting end 515. The first connecting end 514 is formed as a first plug-in portion 53 to be connected to the seat body 1. The second connecting end 515 is detachably connected to the second support 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 support leg 51, the second connecting member 57 is connected to the second support leg 52, and the first connecting member 56 can be threadedly connected to the second connecting member 57. In this embodiment, the first support leg 51 includes a first main body 517 and a connecting seat 504 sleeved on the first main body 517, the first main body 517 is, for example, a solid rod-shaped structure, and the material of the first main body 517 can be wood, plastic, etc. The second support leg 52 includes a second main body 522, which is, for example, a solid rod-shaped structure, and its manufacturing material can be wood, plastic, etc. The second main body 522 and the first main body 517 together constitute the support leg body 503 of the support leg 5. The second connecting end 514 of the first support leg 51 is provided with a first accommodating hole 511, that is, the second connecting end 514 of the first main body 517 is provided with a first accommodating hole 511, and the first connecting member 56 is fixed in the first accommodating hole 511. In this embodiment, the inner wall of the first accommodating hole 511 is not provided with a thread, and the outer wall of the first connecting member 56 is provided with a self-tapping thread. The first connecting member 56 is threadedly connected to the inner wall of the first accommodating hole 511 through the self-tapping thread, so that the first connecting member 56 is fixed in the first accommodating hole 511. In an alternative embodiment, the inner wall of the first accommodating hole 511 may be formed with a female thread, and the first connecting member 56 is provided with a male thread matching the female thread of the first accommodating hole 511, and the first connecting member 56 is threadedly connected in the first accommodating hole 511. Combined with reference Fig. 27 In this embodiment, the first connecting member 56 is further provided with a first threaded hole 565, which at least penetrates one end of the first connecting member 56 and is used to realize threaded connection with the second connecting member 57. The second supporting leg 52 is, for example, a solid rod-shaped structure, and the manufacturing material of the second supporting leg 52 can be wood, plastic, etc. Fig.28 and Fig.29 The second connecting member 57 includes a first connecting section 574 and a second connecting section 575. The second connecting section 575 is formed into a self-tapping screw and connected to the second leg 52. The first connecting section 574 is provided with a male thread that matches the female thread of the first threaded hole 565 and is used for threaded connection with the first threaded hole 565.

[0182] Fig.18FIG. 1 is a schematic diagram showing the structure of the connection between the second leg 52 and the dining tray 6 of the children's chair 100 according to some embodiments of the present invention in the third use mode. Figures 10 to 12 The dining tray 6 is detachably connected to the seat body 1, and the dining tray 6 can be detachably connected to the second leg 52 to allow the child chair 100 to be switched to Fig.18 In the third use mode shown, the child chair 100 in the first use mode is split and formed into a small chair and a small table. The connection between the dining tray 6 and the seat body 1 is not the focus of this application and will not be described in detail here.

[0183] Furthermore, if Fig.18 As shown, the dining tray 6 has an upper end surface 62 and a lower end surface 63, and the upper end surface 62 of the dining tray 6 is suitable for placing items. The lower end surface 63 of the dining tray 6 is provided with a leg connecting portion 61 suitable for connecting with the second leg 52. In this embodiment, the leg connecting portion 61 is provided with a third accommodating hole 611, and a third connecting member 612 is provided in the third accommodating hole 611. The third connecting member 612 is provided with a female thread suitable for matching with the male thread of the second connecting member 57. The plug-in column portion 593 of the second decorative cover 59 is at least partially accommodated in the third accommodating hole 611, and the second connecting member 57 is inserted into the third accommodating hole 611 and is threadedly connected with the third connecting member 612. The leg connecting portion 61 has a second arcuate end surface 613 suitable for matching with the arcuate concave surface 594, and the second arcuate end surface 613 is substantially the same in shape as the first arcuate end surface 582. The leg connecting portion 61 is further provided with an inserting recess 614 , and the side wall of the second accommodating hole 521 is at least partially insertably matched with the inserting recess 614 .

[0184] Fig.29 FIG. 1 is a schematic diagram showing the structure of the connection between the second leg 52 and the dining tray 6 of the child chair 100 in the third use mode according to some other embodiments of the present invention. Fig.26 As shown, the dining tray 6 is detachably connected to the seat body 1, and the dining tray 6 can be detachably connected to the second support leg 52 to allow the child chair 100 to be switched to Fig.12 The third usage mode shown. The dinner tray 6 in this embodiment is different from the dinner tray 6 in some of the above embodiments in at least the following ways.

[0185] like Figure 29 to Figure 32As shown, the dining tray 6 is provided with a foot connection portion 61 suitable for connecting with the second foot 52. The foot connection portion 61 is provided with a third receiving hole 611, and a third connecting member 612 is provided in the third receiving hole 611. The third connecting member 612 has a female thread, and the female thread is suitable for matching 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. The structure of the third connecting member 612 can be the same as that of the first connecting member 56. The second connecting section 575 of the second connecting member 57 can be selectively connected to one of the first connecting member 56 and the third connecting member 612 according to the use mode of the children's chair 100. The outer contour of the cross section of the third connecting member 612 can be circular, square, hexagonal, etc., which is not limited by the present application. The third connecting member 612 can be fixed in the third receiving hole 611 by gluing, interference fit, threaded connection, coating injection, etc. In the third use mode of the child chair 100 , the second leg 52 is threadedly connected to the third connecting member 612 via the first connecting section 574 of the second connecting member 57 .

[0186] like Fig.31 and Fig.32 As shown, in some other embodiments, the child chair 100 is further provided with a bottom cover assembly 9, which is detachably connected to the lower end surface 63 of the dining tray 6, and specifically detachably connected to the leg connection portion 61 of the dining tray 6. Fig.35 As shown, the bottom cover assembly 9 is detachably connected to the third connecting member 612, and the bottom cover assembly 9 can be connected to the first connecting member 56 provided in the first leg 51, so that the first leg 51 is better supported on the ground, and at the same time plays a role in anti-slip and noise reduction. When the child chair 100 is used in the first use mode or the second use mode, the first leg 51 is connected to the second leg 52, and the bottom cover assembly 9 is not needed at this time. The bottom cover assembly 9 can be hidden and stored under the dining tray 6 by connecting the bottom cover assembly 9 to the third connecting member 612. When the child chair 100 needs to be switched to the third use mode, the bottom cover assembly 9 can be removed from the dining tray 6 and connected to the first connecting member 56 provided in the first leg 51. In this way, the bottom cover assembly 9 can be conveniently taken when it is needed, and the use function and appearance of the dining tray 6 are not affected.

[0187] like Fig.30 and Fig.32As shown, in this embodiment, the number of bottom cover assemblies 9 corresponds to the number of third connecting members 612, and is greater than or equal to the number of supporting legs 5. In this embodiment, the number of supporting legs 5 is four, and the dining tray 6 is also provided with four bottom cover assemblies 9. The outer contour of the dining tray 6 is generally trapezoidal, and each bottom cover assembly 9 is correspondingly provided near the four corners of the trapezoid. In other embodiments, the dining tray 6 may also be provided with a connecting portion for accommodating the bottom cover assembly 9 at other positions, and the number of the bottom cover assemblies 9 may also be different from the number of the third connecting members 612. For ease of description, one of the bottom cover assemblies 9 is taken as an example for description below.

[0188] like Figure 32 to Figure 35 As shown, the bottom cover assembly 9 includes a cover body 91 and a fourth connecting member 92 that are 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 use mode of the child chair 100. The fourth connecting member 92 is fixedly connected to the cover body 91, and can be detachably connected to the cover body 91, or formed integrally with the cover body 91. In this embodiment, the manufacturing material of the fourth connecting member 92 includes metal, for example. The fourth connecting member 92 has a fourth threaded portion 921 and a fourth connecting portion 922, and the fourth connecting portion 922 is fixedly connected to the cover body 91. The fourth threaded portion 921 is provided with a male thread, which matches the female thread of the third connecting member 612 and matches the female thread of the first connecting member 56. The fourth threaded portion 921 is used to selectively connect to the first connecting member 56 or the third connecting member 612. Exemplarily, the fourth connecting member 92 is a bolt.

[0189] Reference Fig.32, the outer contour of the cover body 91 is roughly hemispherical. The cover body 91 has a curved surface 911 and an abutting end face 912, the curved surface 911 protrudes outward, and the abutting end face 912 is generally annular, in other words, the abutting end face 912 is generally a planar annular end face. The material of the cover body 91 includes, for example, plastic, rubber, wood, etc. When the cover body 91 is connected to the first leg 51, the first leg 51 is supported on the ground by the cover body 91, which plays a role in anti-slip and noise reduction. The fourth connecting portion 922 of the fourth connecting member 92 can be completely inserted into the first leg 51, so that the abutting end face 912 can abut against the end face of the first leg 51, so that the force transmitted to the fourth connecting member 92 can be partially shared. The fourth connecting portion 922 extends out of the cover body 91 in a direction away from the curved surface 911. The cover body 91 is provided with a fixing hole 913, and the fourth connecting portion 922 of the fourth connecting member 92 is fixed in the fixing hole 913, and the fourth connecting portion 922 extends out of the fixing hole 913. The cross section of the fixing hole 913 is roughly hexagonal, but is not limited thereto. Exemplarily, the bottom cover assembly 9 can be manufactured by the following steps: the fourth connecting portion 922 of the manufactured fourth connecting member 92 (such as a bolt) is fixed in the molding mold of the cover body 91, and then the cover body 91 coated on the outside of the fourth connecting portion 922 is obtained by an injection molding process, that is, the fourth connecting portion 922 is fixedly connected in the fixing hole 913 of the cover body 91. Alternatively, the bottom cover assembly 9 is manufactured by fixing the fourth connecting portion 922 in the fixing hole 913 of the cover body 91 by gluing, interference fit, etc.

[0190] like Fig.32 As shown, the lower end surface 63 of the dining tray 6 is provided with a receiving groove 64, and the receiving groove 64 is located at the support leg connecting portion 61, and the third receiving hole 611 passes through the bottom wall of the receiving groove 64. The bottom wall of the receiving groove 64 is a plane. When the child chair 100 is in the first use mode or the second use mode (that is, when the bottom cover assembly 9 is connected to the support leg connecting portion 61), the cover body 91 is at least partially received in the receiving groove 64, and its abutting end surface 912 contacts the bottom wall of the receiving groove 64. The provision of the receiving groove 64 can reduce the amount of the cover body 91 protruding from the lower end surface 63 of the dining tray 6, thereby reducing the interference that may be 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, and its end face abuts against the bottom wall of the accommodating groove 64, and the side surface of the second leg 57 is limited by the accommodating groove 64, thereby increasing the connection strength between the second leg 57 and the leg connecting portion 61.

[0191] Figures 19 to 21A schematic structural diagram of a footrest member 7 and a footrest connecting mechanism 8 according to some embodiments of the present invention is shown. The child chair 100 is also provided with a footrest member 7 and a footrest connecting mechanism 8. At least a portion of the footrest member 7 is disposed between the two front supporting feet 5a. The footrest member 7 is detachably connected to the two front supporting feet 5a through the footrest connecting mechanism 8. In the present embodiment, the child chair 100 is provided with two footrest connecting mechanisms 8, and the connection between the footrest member 7 and the two front supporting feet 5a is respectively achieved through a footrest connecting mechanism 8. It should be understood that in other embodiments, the connection between the footrest member 7 and one of the front supporting feet 5a may be achieved through the footrest connecting mechanism 8, and the connection between the footrest member 7 and the other front supporting foot 5a may be achieved through other structures, and the present application does not limit this. For ease of description, one of the footrest connecting mechanisms 8 is taken as an example for explanation below.

[0192] like Figures 19 to 21As shown, the pedal connection mechanism includes a pedal connection member 81, a pedal operating member 82 drivingly connected to the pedal connection member 81, and a pedal reset member 83. The pedal connection member 81 is movably arranged on the pedal member 7, and a hook portion 811 is formed at the end of the pedal member 7. The pedal member 7 is provided with a accommodating chamber 71, and the side wall of the accommodating chamber 71 is provided with a through hole 72. The pedal connection member 81 is at least partially accommodated in the accommodating chamber 71, and the hook portion 811 of the pedal connection member 81 can extend out of the accommodating chamber 71 through the through hole. The corresponding front supporting foot 5a is provided with a hollow cavity 55, and the side wall of the hollow cavity 55 is provided with a connecting hole 551. The pedal connection member 81 can switch between a pedal locking position and a pedal unlocking position. When the pedal connector 81 is located at the pedal locking position, the hook portion 811 passes through the connection hole 551 and can be stopped by the inner side wall of the hollow cavity 55, so that the pedal member 7 is connected to the front support foot 5a. The hook portion 811 is stopped by the inner side wall of the hollow cavity 55 to prevent the pedal connector 81 from accidentally coming out of the connection hole 551, thereby improving the stability of the connection between the pedal member 7 and the front support foot 5a. When the pedal connector 81 is located at the pedal unlocking position, the hook portion 811 is disengaged from the connection hole 551, so that the pedal member 7 can be removed from the support foot 5. In this embodiment, the connection hole 551 is a strip hole extending along the length direction of the support foot 5. When it is necessary to separate the pedal member 7 from the supporting foot 5, the pedal member 7 is moved upward so that the hook portion 811 of the pedal connector 81 is disengaged from the inner wall of the hollow cavity 55, so as to allow the pedal connector 81 to be disengaged from the connecting hole 551, and then the pedal operating member 82 is operated to drive the connector 81 to retract so that it is disengaged from the engagement with the connecting hole 551, and the pedal member 7 can be removed. The connecting hole 551 is provided on the first supporting foot 51. By changing the position of the connecting hole 551 and the number of the connecting holes 551, the height of the pedal connector 81 can be changed. It can be understood that in other embodiments not shown, the connecting hole 551 can be provided on the second supporting foot 52 or on the first supporting foot 51 and the second supporting foot 52, and this application does not limit this.

[0193] Furthermore, if Fig. 20 As shown, the pedal operating member 82 is operably arranged on the pedal member 7. The pedal operating member 82 includes a pedal operating portion 821. A portion of the pedal operating member 82 is accommodated in the accommodating chamber 71 and is connected to the pedal member 7 to drive the pedal connecting member 81 to move between the pedal locking position and the pedal unlocking position. The bottom wall of the accommodating chamber 71 is provided with an operating port 73, and the operating port 73 is communicated with the accommodating chamber 71. The pedal operating portion 821 of the pedal operating member 82 extends out of the accommodating chamber 71 through the operating port 73 and can move along the operating port 73. The pedal operating portion 821 can abut against the end of the operating port 73, thereby limiting the moving stroke of the pedal operating member 82. In the present embodiment, the moving direction of the pedal operating member 82 is substantially parallel to the moving direction of the pedal connecting member 81. Fig.36 and Fig.37 The following are structural diagrams of pedal members 7 and pedal connection mechanisms 8 according to other embodiments of the present invention. The pedal members 7 and pedal connection mechanisms 8 in this embodiment are mainly different from those in the above embodiments in the following aspects.

[0194] like Fig.36 As shown, the footrest member 7 is detachably connected between the two supporting feet 5 through the footrest connecting mechanism 8. In this embodiment, the child chair 100 is equipped with two footrest connecting mechanisms 8, and both sides of the footrest member 7 are respectively connected to the corresponding front supporting feet 5a of the two front supporting feet 5a through the footrest connecting mechanisms 8.

[0195] Combined with Fig.37 As shown, the pedal member 7 includes an upper shell 74 and a lower shell 75, and the upper shell 74 is detachably connected to the lower shell 75. The upper shell 74 forms the pedal surface of the pedal member 7. The pedal connecting mechanism 8 includes a pedal connecting member 81, and the pedal connecting member 81 is in a sheet shape. The pedal connecting member 81 includes a first part 814 and a second part 815, and the first part 814 is connected to the pedal member 7. Specifically, the first part 814 is located between the upper shell 74 and the lower shell 75 and is connected to the upper shell 74. The second part 815 extends out of the pedal member 7 along the side of the pedal member 7 and is provided with a connecting recess 8153, which is used for the second connecting member 57 to pass through. The connecting recess 8153 is, for example, a perforation, a groove, etc. The second connecting member 57 is connected to the first connecting member 56 through the connecting recess 8153, so that the second part 815 is fixed between the first leg and the second leg. In this way, a detachable connection between the first supporting leg 51 and the second supporting leg 52 is achieved, and the footrest member 7 is detachably connected to the supporting leg 5 through the footrest connecting member 81 .

[0196] Reference Fig.36, at least one of the first leg 51 and the second leg 52 is provided with a retaining groove 507, and the shape of the retaining groove 507 matches the shape of the second part 815. The retaining groove 507 is suitable for accommodating the second part 815 and limiting the second part 815 therein. Specifically, the second part 815 is clamped in the retaining groove 507. In this way, the footrest connector 81 can be prevented from being exposed, making the appearance of the children's chair 100 neat, and the footrest connector 81 can be prevented from shaking relative to the supporting leg 5. In this embodiment, a side is provided with an avoidance recess 76, and the second part 815 of the footrest connector 81 extends toward the avoidance recess 76. The avoidance recess 76 has an arc-shaped side wall, and the shape of the side wall of the avoidance recess 76 matches the side shape of the first leg 51 and the second leg 52. In this way, when the pedal member 7 is connected to the supporting foot 5, the side wall of the first portion 814 avoiding the recess 76 can fit with the side of the first support leg 51 and the second support leg 52, avoiding the pedal connector 81, thereby making the appearance more neat and beautiful. In this embodiment, the second portion 815 includes a roughly circular circular portion 8151 and a roughly rectangular rectangular portion 8152, and the diameter of the circular portion 8151 is greater than the width of the rectangular portion 8152, so that the second portion 815 can be limited in the containing groove 507.

[0197] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0198] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A backrest connection structure for a child chair, the child carrier comprising a seat body and a backrest assembly, characterized in that: The backrest assembly is detachably connected to the seat body via the backrest connection structure, and the backrest connection structure includes a backrest disassembly mechanism, and the backrest disassembly mechanism includes: A clamping member, movably disposed on the backrest assembly, the clamping member having a clamping end; and a disassembly operating member, rotatably connected to the backrest assembly, the disassembly operating member being drivingly connected to the engaging member, and the disassembly operating member being rotatably operated to move the engaging member between a first backrest locking position and a first backrest releasing position; The seat body is provided with a locking portion. When the locking member is located at a first backrest locking position, the locking end can be engaged with the locking portion to connect the backrest assembly to the seat body. When the locking member is located at a first backrest releasing position, the locking end is disengaged from the locking portion to allow the backrest assembly to be separated from the seat body.

2. The backrest connection structure according to claim 1, characterized in that: One of the engaging member and the disassembly operating member is provided with a connecting boss, and the other of the disassembly operating member and the disassembly operating member is provided with a connecting groove, the extension direction of the connecting groove is perpendicular to the pivot axis of the disassembly operating member, the connecting boss is engaged with the connecting groove, and can slide along the connecting groove.

3. The backrest connection structure according to claim 2, characterized in that: The notch of the connecting groove is provided with an abutment portion, The connecting boss includes a first column portion and a second column portion connected to the end surface of the first column portion, the diameter of the second column portion is greater than the diameter of the first column portion, the second column portion is accommodated in the connecting groove and abuts against the abutting portion.

4. The backrest connection structure according to claim 2, characterized in that: The engaging member includes a first straight section, a second straight section, and a connecting section connected to the first straight section and the second straight section. The first straight section is parallel to the second straight section but not colinear. The first straight section forms the engaging end.

5. The backrest connection structure according to claim 2, characterized in that: The backrest disassembly mechanism is configured with two engaging members, and the disassembly operating member is provided with two connecting grooves, and the two connecting grooves are distributed in rotational symmetry with respect to the pivot axis of the disassembly operating member.

6. The backrest connection structure according to claim 1, characterized in that: The backrest disassembly mechanism further comprises a disassembly restoring member, wherein the restoring member is adapted to bias the engaging member so as to move the engaging member toward the first backrest locking position.

7. The backrest connection structure according to claim 6, characterized in that: The backrest assembly is provided with a first limiting groove suitable for accommodating the disassembly and restoration member, and the engaging member is provided with a limiting protrusion. The engaging member is at least partially accommodated in the first limiting groove, one end of the disassembly and restoration member abuts against the limiting protrusion, and the other end of the disassembly and restoration member abuts against the side wall of the first limiting groove.

8. The backrest connection structure according to claim 1, characterized in that: The backrest assembly includes a backrest body and a backrest decorative cover, the backrest body and the backrest decorative cover are combined to form a accommodating cavity, the backrest assembly is provided with a first through hole connected to the accommodating cavity, at least a portion of the engaging member is accommodated in the accommodating cavity, and the engaging end can at least partially extend out of the accommodating cavity through the first through hole to engage with the engaging portion.

9. The backrest connection structure according to claim 1, characterized in that: The backrest assembly includes a backrest body and a backrest decorative cover, wherein the backrest body and the backrest decorative cover are combined to form a accommodating cavity, the backrest decorative cover is provided with an operating through hole communicating with the accommodating cavity, and the disassembly operating member is pivotally connected to the backrest body through the operating through hole.

10. The backrest connection structure according to claim 9, characterized in that: The hole wall of the operation through hole is provided with a retaining protrusion, and the disassembly operation member is provided with a retaining recess suitable for engaging with the retaining protrusion; Alternatively, a retaining recess is provided on the wall of the operating through hole, and the disassembly operating member is provided with a retaining protrusion suitable for engaging with the retaining recess.

11. The backrest connection structure according to claim 10, characterized in that: The disassembly operation member is provided with a protrusion, the protrusion smoothly transitions with the side surface of the disassembly operation member, and the retaining recess is formed in the protrusion.

12. The backrest connection structure according to claim 1, characterized in that: The disassembly operation member includes a pivoting portion with a cylindrical outer contour and a disassembly operation portion arranged on the end surface of the pivoting portion. The pivoting portion is pivotally connected to the backrest assembly and is drivingly connected to the engaging member.

13. The backrest connection structure according to claim 1, characterized in that: It also includes a backrest adjustment mechanism, the backrest adjustment mechanism includes: An adjusting member is movably arranged on the backrest assembly, and the adjusting member has a clamping end. At least one adjustment part is provided on the seat body, and the adjustment part can move between a second backrest locking position and a second backrest unlocking position. When the adjustment part is located at the second backrest locking position, the clamping end can be engaged with one of the adjustment parts, and when the adjustment part is located at the second backrest unlocking position, the clamping end is released from the adjustment part. When the adjustment member is located at the second backrest locking position and the engaging member is located at the first backrest locking position, the backrest can be fixedly connected to the seat body; when the adjustment member is located at the second backrest releasing position and the engaging member is located at the first backrest releasing position, the backrest assembly can be separated from the seat body.

14. The backrest connection structure according to claim 13, characterized in that: There are multiple adjusting parts, so as to allow the angle of the backrest assembly relative to the seat body to be changed by engaging the clamping end with different adjusting parts.

15. The backrest connection structure according to claim 13, characterized in that: The backrest adjustment mechanism also includes: an adjustment operating member, movably disposed on the backrest assembly, wherein a moving direction of the adjustment operating member forms an angle with a moving direction of the adjustment member; and A driving member, one end of which is connected to the adjusting member, and the other end of which is connected to the adjusting operating member. The adjustment operating member is movable between a first position and a second position to drive the adjustment member to move between the adjustment locking position and the adjustment releasing position.

16. The backrest connection structure according to claim 15, characterized in that: The backrest assembly comprises a backrest body and a backrest decorative cover, wherein the backrest body and the backrest decorative cover are combined to form a receiving cavity, the backrest assembly is provided with a second through hole communicating with the receiving cavity, at least a portion of the adjustment member is received in the receiving cavity, and the clamping end can extend out of the receiving cavity through the second through hole. One end of the driving member is accommodated in the accommodating cavity and connected to the adjusting member, and the other end of the driving member extends out of the accommodating cavity and is connected to the adjusting operating member.

17. The backrest connection structure according to claim 15, characterized in that: The backrest adjustment mechanism further includes a first backrest restoration member, which is adapted to bias the adjustment operating member to move toward the first position.

18. A children's chair, characterized in that: The invention comprises a seat body, a backrest assembly and a backrest connecting structure as claimed in any one of claims 1 to 17, wherein the backrest assembly is detachably connected to the seat body via the backrest connecting structure.

19. The child chair according to claim 18, characterized in that: It also includes a plurality of supporting feet, each of which has a first plug-in portion, the first plug-in portion is provided with an elastic arm, and the elastic arm is provided with a locking protrusion, The seat body is provided with a plurality of second plug-in parts, each of which is provided with a plug-in hole and a locking hole, and the locking hole penetrates through the side wall of the plug-in hole. The first plug-in parts of the plurality of support legs are respectively plugged into the plurality of plug-in holes, and the locking protrusions are engaged with the locking holes.

20. The children's chair according to claim 19, characterized in that: Each of the plug holes has a first end face, and the angle between the plane where the first end face is located and the extension direction D5 of the plug hole is greater than 90°. Each of the supporting legs is provided with a second end face, and the angle between the plane where the second end face is located and the extension direction D6 of the first plug-in portion is greater than 90°. When the first plug-in portion is plugged into the plug-in hole, the second end surface abuts against the first end surface.

21. The child chair according to claim 18, characterized in that: Also included are a plurality of support feet adapted to support the seat body, each of the support feet comprising: A first support leg, comprising a first connecting end and a second connecting end, wherein the first connecting end is connected to the seat body, and the second connecting end is provided with a first connecting member; and The second leg is provided with a second connecting member; One of the first leg and the second leg is provided with a male thread, the other of the first leg and the second leg is provided with a female thread, and the second connecting member can be threadedly connected to the first connecting member to connect the second leg to the first leg.

22. The children's chair according to claim 21, characterized in that: At least the second connecting end of the first supporting leg has a first receiving hole, and at least a portion of the first connecting member is received in the first receiving hole. At least one end of the second leg has a second receiving hole, and at least a portion of the second connecting member is received in the second receiving hole. The first connecting member is provided with the female thread, and the second connecting member is provided with the male thread.

23. The children's chair according to claim 22, characterized in that: The second connecting end is provided with a first decorative cover that is clamped with the first connecting member, a portion of the decorative cover is accommodated in the first accommodating hole, and another portion of the first decorative cover extends out of the first accommodating hole and forms a first arc-shaped end surface. The first decorative cover is provided with a first through hole to allow the female thread of the first connecting member to be connected with the male thread of the second connecting member.

24. The children's chair according to claim 23, characterized in that: When the first supporting leg is connected to the second supporting leg, the first arc-shaped end surface of the first decorative cover extending out of the first receiving hole can be received in the second receiving hole of the second supporting leg.

25. The children's chair according to claim 23, characterized in that: The first connecting member comprises: a first connecting portion connected to an inner side wall of the first receiving hole; and A first threaded portion, provided with the female thread; At least a portion of the first threaded portion is inserted into the first through hole, a first recess is provided on a side surface of the first threaded portion, a first protrusion is provided on a side wall of the first through hole, and the first protrusion is engaged with the first recess.

26. The children's chair according to claim 25, characterized in that: One of the first connection portion and the first decorative cover is provided with a second convex portion, the other of the first connection portion and the first decorative cover is provided with a second concave portion, and the second convex portion is engaged with the second concave portion.

27. The children's chair according to claim 22, characterized in that: The second supporting leg is provided with a second decorative cover, which is accommodated in the second accommodating hole and clamped with the second connecting member. The second decorative cover is provided with a second through hole suitable for the second connecting member to pass through, so as to allow the second connecting member to be threadedly connected with the first connecting member.

28. The children's chair according to claim 27, characterized in that: The second decorative cover is provided with a snap-fit ​​finger, the end of which forms a snap-fit ​​hook, and the second connecting member is provided with a snap-fit ​​through-hole, and the snap-fit ​​hook passes through the snap-fit ​​through-hole and abuts against the end surface of the snap-fit ​​through-hole.

29. The children's chair according to claim 21, characterized in that: It also includes a dining tray detachably connected to the seat body, wherein the dining tray is provided with a support foot connection portion for detachably connecting to the support foot. One of the leg connection portion and the second leg is provided with the male thread, the other of the leg connection portion and the second leg is provided with the female thread, and the second leg can be threadedly connected to the leg connection portion.

30. The children's chair according to claim 18, characterized in that: Also includes: A plurality of supporting feet, adapted to support the seat body, the plurality of supporting feet comprising two front supporting feet, a footrest, at least a portion of which is disposed between the two front supporting feet; and A pedal connection mechanism, through which the pedal member is detachably connected to the two front supporting feet.

31. The children's chair according to claim 30, characterized in that: The pedal connection mechanism comprises: A pedal connecting member is movably arranged on the pedal member, and a hook portion is formed at the end of the pedal member; The corresponding front supporting foot is provided with a hollow cavity, and the side wall of the hollow cavity is provided with a connecting hole. The pedal connector can switch between a pedal locking position and a pedal releasing position. When the pedal connector is located at the pedal locking position, the hook portion passes through the connecting hole and can be stopped by the inner wall of the hollow cavity. When the pedal connector is located at the pedal releasing position, the hook portion disengages from the connecting hole.

32. The children's chair according to claim 31, characterized in that: The pedal connection mechanism further includes a pedal operating member, which is movably disposed on the pedal member and connected to the pedal connection member, and the pedal operating member includes an operable pedal operating portion.

33. The children's chair according to claim 32, characterized in that: The pedal member is provided with a holding cavity, a side wall of the holding cavity is provided with a through hole, and a bottom wall of the holding cavity is provided with an operation port. A portion of the pedal operating member is accommodated in the accommodation chamber, the pedal operating portion extends out of the accommodation chamber through the operating opening, the pedal connecting member is connected to the pedal operating member, and the hook portion can extend out of the accommodation chamber through the through opening.

34. The children's chair according to claim 32, characterized in that: The pedal connection mechanism also includes: A pedal reset member is adapted to bias the pedal operating member to drive the pedal connecting member to move toward the pedal locking position.

35. The children's chair according to claim 30, characterized in that: The supporting leg comprises a first supporting leg and a second supporting leg, wherein a first connecting member is disposed in the first supporting leg, and a second connecting member is disposed in the second supporting leg. The pedal connection mechanism includes a pedal connection member, the pedal connection member includes a first part and a second part, the first part is connected to the pedal member, and the second part is provided with a connection recess, The second connecting member is connected to the first connecting member through the connecting recess, so that the first leg is connected to the second leg, and the second part is limited between the first leg and the second leg.

36. The children's chair according to claim 30, characterized in that: The supporting leg comprises a first supporting leg and a second supporting leg detachably connected to the first supporting leg, The pedal connection mechanism includes a pedal connection member, and the pedal connection member includes a first part and a second part, the first part is connected to the pedal member, and at least one of the first leg and the second leg is provided with a retaining groove, the shape of the retaining groove matches the shape of the second part, and the retaining groove is suitable for accommodating the second part and limiting the second part therein.

37. The children's chair according to claim 21, characterized in that: The children's chair also includes a bottom cover assembly and a dining tray detachably connected to the seat body. The children's chair has multiple usage modes. The bottom cover assembly is selectively detachably connected to one of the first leg and the dining tray according to the usage mode of the children's chair.

38. The children's chair according to claim 37, characterized in that: The first connecting member is provided with a female thread, and the bottom cover assembly comprises: A cover body having a curved surface, wherein the curved surface is suitable for contacting the ground; a fourth connecting member, connected to the cover body and provided with a male thread matching the female thread of the first connecting member; The dining tray has a support leg connection portion, and the support leg connection portion is provided with a female thread matching the male thread of the fourth connecting member; The fourth connecting member is selectively threadedly connected to one of the leg connecting portion and the first connecting member.

39. The children's chair according to claim 38, characterized in that: The support leg connecting portion is provided with a receiving groove, and the receiving groove is located at the lower end surface of the dinner plate. In a use mode in which the dinner plate 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.

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