High chair

Abstract

A high chair includes a seat frame, a first backrest assembly, and a second backrest assembly. The seat frame comprises a supporting frame and a seat part erected on the supporting frame. The first backrest assembly is used for being detachably and fixedly connected with the seat frame, and the first backrest assembly comprises a first backrest part, a surrounding part and a first connecting part used for being connected with the seat frame. The second backrest assembly is used for being detachably and fixedly connected with the seat part and comprises a second backrest part and a second connecting part used for being connected with the seat frame. Wherein the seat frame can be connected with one of the first backrest assembly and the second backrest assembly, and when the first backrest assembly is fixedly connected with the seat frame, the high chair is in a first use mode; when the second backrest assembly is fixedly connected with the seat frame, the high chair is in a second use mode; when neither the first backrest assembly nor the second backrest assembly is connected with the seat part, the high chair is in a third use mode.

Description

Technical Field

[0001] The invention relates to the technical field of seats, in particular to a high chair. Background Art

[0002] Children's dining chairs have become increasingly popular among parents in recent years, as they are convenient for children to eat and help cultivate good eating habits. However, the functions of children's dining chairs on the market are relatively simple, and most of them are only suitable for younger children. Therefore, the service life is short and the product utilization rate is not high. Summary of the invention

[0003] Based on this, it is necessary to provide a high chair with multiple usage modes, which can well meet the eating needs of children or adults of different ages and has a wider range of usage scenarios.

[0004] The first aspect of the present invention provides a high chair, comprising a seat frame, a first backrest assembly and a second backrest assembly. The seat frame comprises a support frame and a seat portion mounted on the support frame. The first backrest assembly is used to be detachably fixedly connected to the seat frame, and the first backrest assembly comprises a first backrest portion, a surrounding portion and a first connecting portion for connecting to the seat frame. The second backrest assembly is used to be detachably fixedly connected to the seat portion, and the second backrest assembly comprises a second backrest portion and a second connecting portion for connecting to the seat frame. The seat frame can be connected to one of the first backrest assembly and the second backrest assembly. When the first backrest assembly is fixedly connected to the seat frame, the high chair is in a first use mode; when the second backrest assembly is fixedly connected to the seat frame, the high chair is in a second use mode; when neither the first backrest assembly nor the second backrest assembly is connected to the seat portion, the high chair is in a third use mode.

[0005] The high chair can be combined with a first backrest assembly having a first backrest portion and a surrounding portion to form a first usage mode, thereby serving as a dining chair for infants and young children of relatively young ages (e.g., 6 months to 3 years old). The high chair can also be connected with a second backrest assembly having a second backrest portion to form a second usage mode, thereby serving as a growth chair for children of relatively young ages (e.g., 3 to 12 years old). The high chair can also be disconnected from the first backrest portion and the second backrest portion, thereby serving as an adult chair for older children and adults (over 12 years old). In this way, the high chair can well meet the feeding needs of children or adults of different ages by switching between a variety of usage modes, and has a wider range of usage scenarios.

[0006] In one embodiment, the enclosure portion includes a transverse enclosure extending along the lateral direction of the first backrest component and a lateral enclosure extending along the front-to-rear direction of the first backrest component, and the first connecting portion is provided on at least one of the transverse enclosure, the lateral enclosure and the first backrest portion.

[0007] In one embodiment, the first connecting portion includes a first vertical extension portion and a first longitudinal extension portion which are connected to each other and arranged at an angle to each other, and a slot corresponding to the first longitudinal extension portion is provided on the seat frame, and the first longitudinal extension portion is used to be inserted into the slot.

[0008] In one embodiment, an elastic finger is provided on the first longitudinal extension portion, and an opening corresponding to the elastic finger is provided on the slot wall of the slot, and when the first longitudinal extension portion is inserted into the slot, the elastic protrusion of the elastic finger can slide into the opening.

[0009] In one embodiment, the connection between the first longitudinal extension portion and the first vertical extension portion is bent to form a snap-fitting recess, and when the first longitudinal extension portion is inserted into the slot, the snap-fitting recess snaps into the edge of the seat frame.

[0010] In one embodiment, the second connecting portion includes a second vertical extension portion and a second longitudinal extension portion which are connected to each other and arranged at an angle to each other, an end of the second vertical extension portion away from the second longitudinal extension portion is fixedly connected to the second backrest portion, and an end of the second longitudinal extension portion away from the first vertical extension portion is used to be inserted into the insertion channel of the seat frame.

[0011] In one embodiment, the high chair also includes a locking mechanism, which includes a locking piece movably arranged on the seat frame, a locking hole is arranged on the second longitudinal extension portion, and the locking piece has a first locking position and a first releasing position. When the second longitudinal extension portion is inserted into the insertion channel, if the locking piece is in the first locking position, the locking piece can be inserted into the locking hole; if the locking piece is in the first releasing position, the locking piece can be disengaged from the locking hole.

[0012] In one embodiment, the locking mechanism further includes a release member drivingly connected to the locking member, and the release member can be operated to drive the locking member to move to the first release position.

[0013] In one embodiment, the locking mechanism further includes a first restoring member, wherein the first restoring member is adapted to bias the locking member to move toward the first locking position.

[0014] In one embodiment, the first support frame includes a plurality of legs and a foot pedal connected between two of the plurality of legs, the foot pedal includes a pedal body and a pedal connector connected to both ends of the pedal body, the two legs are respectively provided with a plurality of adjustment holes, the plurality of adjustment holes are arranged opposite to each other on the two legs, the high chair also includes an adjusting member, the adjusting member passes through the two pedal connectors and is inserted into two opposite adjustment holes among the plurality of adjustment holes, so as to fix the pedal body at a certain position between the two legs.

[0015] In one embodiment, it also includes a tray portion detachably connected to the enclosure portion or the first backrest portion, the tray portion includes a tray body and a tray connecting portion protruding from the lateral sides of the tray body, the tray connecting portion is provided with a plug-in end, and the enclosure portion or the first backrest portion is provided with a plug-in groove that can be plugged with the plug-in end.

[0016] The second aspect of the present invention provides a high chair, in one embodiment of which, includes a first support frame and a first seat plate. The first support frame includes a plurality of legs and a seat frame. The seat frame is connected to the upper ends of the legs. The first seat plate is mounted on the first support frame. The first support frame is provided with a backrest joint, and the backrest joint is used to connect with a first backrest assembly and a second backrest assembly. When the backrest joint is connected to the first backrest assembly, the high chair is in a first use mode, when the backrest joint is connected to the second backrest assembly, the high chair is in a second use mode, and when the backrest joint is not connected to the first backrest assembly and not connected to the second backrest assembly, the high chair is in a third use mode.

[0017] In one embodiment, the direction is parallel to the plane where the first seat plate is located.

[0018] In one embodiment, the first backrest component and the second backrest component share the engagement groove, and the engagement groove extends along the longitudinal direction of the first seat plate.

[0019] In one embodiment, the engagement groove includes a first engagement groove for connecting to the first backrest component and a second engagement groove for connecting to the second backrest component, and when the first engagement groove is not connected to the first backrest component and the second engagement groove is not connected to the second backrest component, the high chair is in a third usage mode.

[0020] In one embodiment, the first joining groove and the second joining groove both extend along the longitudinal direction of the first seat plate, and the second joining groove is spaced apart from the first joining groove in the transverse direction of the first seat plate; or the first joining groove extends along the longitudinal direction of the first seat plate, and the second joining groove extends along the transverse direction of the first seat plate.

[0021] In one embodiment, the high chair further comprises a footrest, which can be fixed at different height positions relative to the legs, when the high chair is in a first usage mode, the footrest is fixed at a first height position, when the high chair is in a second usage mode, the footrest is fixed at a second height position, and when the high chair is in a third usage mode, the footrest is fixed at a third height position.

[0022] The third aspect of the present invention provides a high chair, in one embodiment of which, the high chair comprises a second support frame, a second seat plate, a first backrest assembly and a second backrest assembly. The second support frame comprises a first support frame and a second support frame, and one end of the first support frame is pivotally connected to one end of the second support frame. The second seat plate is arranged between the first support frame and the second support frame. The first backrest assembly is used to be detachably and pivotally connected to the second support frame, and the first backrest assembly comprises a seat portion and a first backrest portion. The second backrest assembly is used to be detachably connected to the second support frame. Wherein, the second support frame can be connected to one of the first backrest assembly and the second backrest assembly, and when the first backrest assembly is mounted on the second support frame and is located at the first pivot position, the high chair is in the first use mode; when the first backrest assembly is mounted on the second support frame and is located at the second pivot position, the high chair is in the second use mode; when the second backrest assembly is mounted on the second support frame, the high chair is in the third use mode.

[0023] The high chair can be combined with a first backrest assembly having a seat portion and a first backrest portion, and the first backrest assembly is placed in a first pivot position to form a first usage mode, thereby being used as a chair for newborns within 6 months. The high chair can also be combined with a first backrest assembly having a seat portion and a first backrest portion, and the first backrest assembly is placed in a second pivot position to form a second usage mode, thereby being used as a dining chair for infants and young children of a relatively young age (e.g., 6 months to 3 years old). The high chair can also be connected to a second backrest assembly to be used as a growing chair for older children (3 to 12 years old). In this way, the high chair can well meet the feeding needs of children of different ages by switching between a variety of usage modes, and the usage scenarios are more extensive.

[0024] In one embodiment, it also includes a pivot member, which is rotatably disposed on the second support frame, and one of the pivot member and the first backrest component is provided with a mounting recess, and the other is provided with a mounting protrusion, and the mounting recess and the mounting protrusion cooperate to rotatably mount the first backrest component to the second support frame.

[0025] In one embodiment, it further includes a disassembly mechanism disposed on the mounting protrusion, and the disassembly mechanism includes a first operating member and a clamping member. The first operating member has a driving inclined surface. The clamping member can be movably disposed on the mounting protrusion, and the clamping member has a second locking position and a second unlocking position, and the clamping member includes a clamping body and a convex column protruding from the clamping body. A clamping groove is provided in the mounting recess, and when the clamping member is in the second locking position, the clamping body is clamped in the clamping groove, and the first operating member can be operated to push the clamping member to move to the second unlocking position through the driving inclined surface, and when the clamping member is in the second unlocking position, the clamping body is disengaged from the clamping groove.

[0026] In one embodiment, the disassembly mechanism further includes a second reset member, and the second reset member is suitable for biasing the engaging body to move toward the second locking position.

[0027] In one embodiment, the mounting protrusion has limiting protrusions on both sides, and the two side walls of the mounting recess are provided with limiting grooves. When the mounting protrusion is inserted into the mounting recess, the limiting protrusions are correspondingly inserted into the limiting grooves.

[0028] In one embodiment, one end of the first support frame has a first mounting seat, and one end of the second support frame has a second mounting seat, the first mounting seat and the second mounting seat are buckled to form a mounting cavity, and the high chair also includes an angle adjustment mechanism, the angle adjustment mechanism includes a limiter, a second operating member and a second limiter. The limiter is movably arranged in the mounting cavity, the limiter has a third locking position and a third unlocking position, and a first limiter is arranged at the edge of the limiter. The second operating member is arranged on the first mounting seat and can move along the axial direction of the first mounting seat. The second limiter is fixed to the pivot member, and at least part of the second limiter extends into the mounting cavity. Wherein, the pivot member is rotatably arranged on the second mounting seat, when the limiter is in the third locking position, the second limiter is engaged with the first limiter, the second operating member can be operated to push the limiter to move to the third unlocking position, and when the limiter is in the third unlocking position, the second limiter is disengaged from the first limiter.

[0029] In one embodiment, the angle adjustment mechanism further includes a third reset member, wherein the third reset member is disposed between the second mounting seat and the limiting member, and the third reset member is adapted to bias the limiting member to move toward the third locking position.

[0030] In one embodiment, the second mounting seat is provided with an arc-shaped limiting groove, and the second limiting portion extends into the mounting cavity through the limiting groove. When the pivoting member rotates relative to the second mounting seat, the second limiting portion moves along the limiting groove.

[0031] In one embodiment, the second support frame also includes a first connecting frame and a second connecting frame, one side of the first connecting frame is pivotally connected to the first support frame, one side of the second connecting frame is pivotally connected to the second support frame, the other side of the first connecting frame is pivotally connected to the other side of the second connecting frame, the second seat plate is fixedly connected to the first connecting frame, and the second support frame can be switched between an expanded state and a folded state. When the second support frame is in the expanded state, the second seat plate is arranged above the first connecting frame and the second connecting frame.

[0032] In one embodiment, a clamping mechanism is further included, and the clamping mechanism includes a first clamping portion and a second clamping portion. The first clamping portion is operably provided on the second seat plate. The second clamping portion is provided on a side of the second connecting frame away from the first connecting frame. The first clamping portion can be engaged with the second clamping portion to lock the second support frame in the unfolded state, and the first clamping portion can be operated to release the engagement with the second clamping portion to release the lock of the second support frame in the unfolded state.

[0033] The fourth aspect of the present invention provides a high chair, comprising a second support frame, a second seat plate, a pivot member and a limit member. The second support frame comprises a first support frame and a second support frame, and one end of the first support frame is pivotally connected to one end of the second support frame. The second seat plate is arranged between the first support frame and the second support frame. The pivot member is rotatably mounted on the second support frame, and the pivot member is used to engage with the first backrest assembly and the second backrest assembly to achieve the installation of the first backrest assembly and the second backrest assembly. The limit member is movably arranged on the second support frame, and the limit member has a third locking position and a third unlocking position. When the limit member is in the third locking position, the rotation of the pivot member relative to the second support frame will be restricted. When the limit member is in the third unlocking position, the rotation restriction of the pivot member will be released, so that the pivot member can switch between the first pivot position and the second pivot position. When the first backrest assembly is mounted on the pivot member and the pivot member is in a first pivot position, the high chair is in a first usage mode; when the first backrest assembly is mounted on the pivot member and the pivot member is in a second pivot position, the high chair is in a second usage mode; and when the second backrest assembly is mounted on the pivot member, the high chair is in a third usage mode.

[0034] In one embodiment, the high chair further comprises a limiter. The limiter is movably arranged on the second support frame, and has a third locking position and a third unlocking position. When the limiter is in the third locking position, the rotation of the pivoting member relative to the second support frame is restricted. When the limiter is in the third unlocking position, the rotation restriction on the pivoting member is released, so that the pivoting member can switch between the first pivoting position and the second pivoting position.

[0035] In one embodiment, the pivot member is switchable among the first pivot position, the second pivot position and a third pivot position, and when the high chair is in the third usage mode, the pivot member is in the third pivot position.

[0036] In one embodiment, the first support frame is located in front of the high chair relative to the second support frame when the high chair is in the first use mode and the second use mode, and the first support frame is located behind the high chair relative to the second support frame when the high chair is in the third use mode.

[0037] In one embodiment, the upper side of the second supporting frame is formed as a curved tube, and when the high chair is in the third usage mode, the curved tube serves as an armrest.

[0038] In one embodiment, the second support frame is connected to a footrest, and when the high chair is in the third usage mode, the footrest is used to support the feet of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a schematic structural diagram of a high chair according to an embodiment of the present invention, when the high chair is in a first usage mode;

[0040] Figure 2 for Figure 1 A schematic diagram of the structure of the high chair shown in FIG. 1 when a dining tray portion is installed;

[0041] Figure 3 is a schematic diagram of the structure of a high chair according to an embodiment of the present invention, when the high chair is in a second usage mode;

[0042] Figure 4 is a schematic diagram of the structure of a high chair according to an embodiment of the present invention, when the high chair is in a third usage mode;

[0043] Figure 5 for Figure 1 An exploded view of the high chair shown;

[0044] Figure 6 for Figure 5 The high chair shown is a schematic diagram of its structure from another perspective;

[0045] Figure 7 for Figure 6 A magnified image of point A;

[0046] Figure 8 for Figure 5 The high chair shown is a schematic structural diagram from another perspective;

[0047] Fig. 9 for Figure 8 The enlarged view of point B;

[0048] Fig.10 for Figure 3 An exploded view of the high chair shown;

[0049] Fig.11 for Figure 3 The high chair shown is a schematic diagram of its structure from another perspective;

[0050] Fig.12 for Fig.11 a cross-sectional view of the high chair shown and an enlarged view of the locking mechanism in the high chair;

[0051] Fig.13 for Figure 4 An exploded view of the high chair shown;

[0052] Fig.14 for Figure 4 MM section view of the high chair shown;

[0053] Fig.15 for Fig.14 Enlarged view of point C;

[0054] Fig.16 for Fig.14 The enlarged view of point D;

[0055] Fig.17 for Figure 2 Exploded view of the high chair shown,

[0056] Fig.18 for Figure 2 The schematic diagram of the structure of the high chair at another viewing angle and the enlarged view of the connecting fingers and the engaging recess in the high chair are shown;

[0057] Fig.19 for Figure 4 A schematic diagram of the structure of the high chair at another viewing angle and an enlarged view of the footrest and adjustment member in the high chair;

[0058] Fig. 20 for Fig.19 A schematic diagram of the structure of the adjustment member in the high chair shown;

[0059] Fig.21 is a schematic structural diagram of a high chair according to another embodiment of the present invention, in which the high chair is in a first usage mode;

[0060] Fig. 22 is a schematic diagram of the structure of a high chair according to an embodiment of the present invention, when the high chair is in a second usage mode;

[0061] Fig.23 is a schematic diagram of the structure of a high chair according to an embodiment of the present invention, when the high chair is in a third usage mode;

[0062] Fig.24 for Fig.21 The high chair shown is a schematic diagram of the side structure after the first backrest assembly is omitted, and the second support frame is in an unfolded state;

[0063] Fig.25 for Fig.21 The high chair shown is a schematic diagram of the side structure after the first backrest assembly is omitted, and the second support frame is in a semi-folded state;

[0064] Fig.26 for Fig.21 The high chair shown is a schematic diagram of the side structure after the first backrest assembly is omitted, and the second support frame is in a folded state;

[0065] Fig. 27 for Fig.24 The high chair shown is a schematic diagram of its structure from another perspective;

[0066] Fig.28 for Fig.24 a cutaway view of the high chair shown;

[0067] Fig.29 for Fig.25 a cutaway view of the high chair shown;

[0068] Fig.30 for Fig.21 A schematic diagram of the structure of a second support frame and a second seat plate in the high chair shown;

[0069] Fig.31 for Fig.21 A schematic structural diagram of a first backrest assembly in a high chair shown;

[0070] Fig.32 for Fig.31 The structure schematic diagram of the first backrest assembly shown in another viewing angle;

[0071] Fig.33 for Fig.31 A NN cross-sectional view of the first backrest assembly and an enlarged view of the disassembly mechanism therein;

[0072] Fig.34 for Fig.31 A schematic diagram of the internal structure of the disassembly mechanism in the first backrest assembly is shown, wherein the mounting protrusion is omitted;

[0073] Fig.35 for Fig.33 A cross-sectional view of the disassembled structure shown at another angle;

[0074] Fig.36 for Fig.30 The second support frame shown is a partial enlarged view after the first mounting seat is omitted;

[0075] Fig.37 for Fig.21 A partial cross-sectional view of the angle adjustment mechanism in the high chair shown, when the stopper is in the third locking position;

[0076] Fig.38 for Fig.21 A partial cross-sectional view of the angle adjustment mechanism in the high chair shown, when the stopper is in the third unlocking position;

[0077] Fig.39 for Fig.21 Exploded view of the angle adjustment mechanism in the high chair shown.

[0078] Description of Reference Numerals

[0079] 101. Passenger space, 102. Installation cavity,

[0080] 100, seat frame, 110, first support frame, 111, seat frame, 1111, support base, 1112, leg connecting portion, 1112a, plug-in sleeve, 112, leg, 1121, plug-in component, 1122, matching groove, 1123, adjustment hole, 1123a, first thread, 113, fastener, 114, foot pad, 1141, matching convex, 115, pedal, 1151, pedal body, 1152, pedal connecting component, 1152a, first connecting component, 1152b, second connecting component, 116, adjusting component, 1161, operating knob, 1162, fastening bolt, 1162a, second thread, 117, mounting frame, 120, first seat plate, 130, slot, 131, opening, 140, mounting frame, 150, plug-in channel, 151, through hole, 160, locking mechanism, 161, locking member, 1611, hook portion, 162, release member, 1621, operating convex, 1622, first end, 1623, second end, 1624, sleeve convex, 163, first reset member, 170, mounting groove, 171, operating port, 180, reinforcement member,

[0081] 200, first backrest assembly, 210, first backrest portion, 211, backrest body, 212, side baffle, 2121, mounting protrusion, 2121a, accommodating cavity, 2121b, operation hole, 2121c, outer wall, 2121d, engaging hole, 2121e, inner wall, 2121f, limiting protrusion, 2122, plug-in cylinder, 2123, plug-in cavity, 2124, fixing block, 2 20, enclosure portion, 221, transverse enclosure, 222, lateral enclosure, 223, connecting groove, 240, seat portion, 250, leg rest portion, 230, first connecting portion, 231, first vertical extension portion, 232, first longitudinal extension portion, 2321, slot, 2322, elastic finger, 2322a, elastic protrusion, 233, engaging recess, 241, plug-in slot, 242, connecting slot,

[0082] 300, second backrest assembly, 310, second backrest portion, 320, second connecting portion, 321, second vertical extension portion, 322, second longitudinal extension portion, 3221, insertion end, 3222, locking hole,

[0083] 400, a dining tray portion, 410, a dining tray body, 420, a dining tray connection portion, 421, a plug-in end, 422, a connecting finger, 4221, a snap-fitting protrusion, 423, a stopper,

[0084] 500, second support frame, 510, first support frame, 511, first support rod, 512, first connecting rod, 513, first mounting seat, 5131, first mounting groove, 5131a, mounting shaft, 5131b, guide protrusion, 5132, operating groove, 5133, jack, 520, second support frame, 521, second support rod, 522, second connecting rod, 523, second mounting seat, 5231, second mounting groove, 5232, limiting groove, 530, first connecting frame, 531, first cross bar, 532, first longitudinal rod, 540, second connecting frame, 541, second cross bar, 542, second longitudinal rod, 550, locking mechanism, 551, first locking part, 5511, locking body, 5511a, locking groove, 5512, operating handle, 552, second locking part, 560, pivot member,

[0085] 600, the second seat plate,

[0086] 700, pivot member, 710, mounting recess, 711, first groove wall, 712, second groove wall, 713, third groove wall, 714, opening, 715, engaging groove, 716, limiting groove,

[0087] 800, disassembly mechanism, 810, first operating member, 811, operating portion, 812, driving portion, 8121, fork leg, 8122, driving inclined surface, 820, engaging member, 821, engaging body, 8211, engaging end, 8212, reset groove, 822, boss, 830, second reset member,

[0088] 900, angle adjustment mechanism, 910, limiting member, 910', engaging gear, 911, first limiting portion, 911', engaging groove, 9111, first groove, 9112, second groove, 912, engaging convex tooth, 9121, first convex tooth, 9122, second convex tooth, 9123, third convex tooth, 913, mounting hole, 914, guide groove, 920, second operating member, 921, operating body, 922, operating protrusion, 923, operating limiting portion, 930, second limiting portion, 930', engaging protrusion, 931, connecting arm, 932, engaging arm, 940, third reset member. DETAILED DESCRIPTION

[0089] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0090] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element in the middle. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0091] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0092] The present invention provides a high chair, which has multiple usage modes, can well meet the eating needs of children or adults of different age groups, and has a wider range of usage scenarios.

[0093] The high chair can have a variety of structural forms. In one embodiment, Figures 1 to 4 As shown, the high chair comprises a seat frame 100, a first backrest assembly 200 and a second backrest assembly 300. The seat frame 100 comprises a first support frame 110 and a first seat plate 120 mounted on the first support frame 110.

[0094] like Figure 1 As shown, the first backrest assembly 200 includes a first backrest portion 210, a surrounding portion 220, and a first connection portion 230 for connecting with the seat frame 100. The first backrest portion 210 is used to be detachably connected to the seat frame 100 through the first connection portion 230. When the first backrest assembly 200 is connected to the seat frame 100, the high chair is in a first use mode, i.e., a dining chair mode, which is suitable for infants and young children aged about 6 months to 3 years old to eat. The infants and young children can sit in the seating space 101 enclosed by the first backrest portion 210 and the surrounding portion 220 without easily sliding off the high chair.

[0095] like Figure 2 As shown, a dining tray portion 400 may be installed on the front side of the first backrest assembly 200 in a detachable or non-detachable manner to facilitate placing tableware and food for infants and young children.

[0096] like Figure 3As shown, the second backrest assembly 300 includes a second backrest portion 310 and a second connecting portion 320 for connecting to the seat frame 100. The second backrest assembly 300 is used to be detachably connected to the first seat plate 120 via the second connecting portion 320. When the second backrest assembly 300 is fixedly connected to the seat frame 100, the high chair is in the second use mode, i.e., the growth chair mode, which is mainly suitable for children aged about 3 to 12 years old. The second backrest portion 310 is not provided with a blocking portion, which can facilitate children to get on and off the high chair easily and independently, and also facilitate the high chair to be moved to the side of the dining table so that children can eat at the same table with adults. Of course, the high chair in this use mode is not limited to being used as a dining chair, but can also be used by children or adults in occasions such as learning or playing.

[0097] like Figure 4 As shown, when the first backrest assembly 200 and the second backrest assembly 300 are not connected to the first seat plate 120, the high chair is in the third use mode, i.e., the adult chair mode, which is suitable for children or adults over about 12 years old. Similarly, the high 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.

[0098] Specifically, Figure 5 As shown, the enclosure 220 includes a transverse enclosure 221 extending along the transverse direction of the first backrest assembly 200 and two lateral enclosures 222 extending along the longitudinal direction of the backrest assembly. The two lateral enclosures 222 are generally rectangular plate-shaped structures, and one side of the two lateral enclosures 222 is respectively connected to the left and right sides of the first backrest 210. The transverse enclosure 221 is a long strip structure, and the two ends of the transverse enclosure 221 are respectively connected to the side of the two lateral enclosures 222 away from the first backrest 210. In this way, the transverse enclosure 221, the two lateral enclosures 222 and the first backrest 210 together enclose a seating space 101 for infants and young children to sit on.

[0099] Furthermore, at least one of the transverse enclosure 221, the lateral enclosure 222 and the first backrest portion 210 is provided with a first connecting portion 230. In this embodiment, a first connecting portion 230 (such as Figure 6 The first backrest portion 210 is connected to two first connecting portions 230 (as shown in FIG. Figure 8 In other embodiments, the number and location of the first connection parts 230 may also be adjusted as needed. For example, one or at least two first connection parts 230 may be connected to the lower side of each lateral enclosure part 222, or only one or at least two first connection parts 230 may be connected to the lower side of the first backrest part 210, etc., and the present invention is not limited thereto.

[0100] like Figures 6 to 9As shown, the first connecting portion 230 includes a first vertical extension portion 231 and a first longitudinal extension portion 232 which are connected to each other and arranged at an angle to each other. In this embodiment, the first vertical extension portion 231 and the first longitudinal extension portion 232 are both plate-like structures. One end of the first vertical extension portion 231 away from the first longitudinal extension portion 232 is connected to the transverse enclosure 221 or the first backrest portion 210. The seat frame 100 is provided with a slot 130 corresponding to the first longitudinal extension portion 232, and the first longitudinal extension portion 232 is used to be inserted into the slot 130.

[0101] Furthermore, a slot 2321 is further provided on the first longitudinal extension portion 232, and a resilient finger 2322 is connected to a hole wall on one side of the slot 2321, and a resilient protrusion 2322a facing away from the first vertical extension portion 231 is provided at the free end of the resilient finger 2322. That is, an opening 131 is provided on a slot wall on one side of the slot 130 away from the first seat plate 120. When the first longitudinal extension portion 232 is inserted into the slot 130, the resilient protrusion 2322a of the resilient finger 2322 can slide into the opening 131. In this way, the connection between the first longitudinal extension portion 232 and the first seat plate 120 can be more firmly established, that is, the connection between the first backrest assembly 200 and the seat frame 100 can be more firmly established.

[0102] Furthermore, the connection between the first longitudinal extension portion 232 and the first vertical extension portion 231 is bent to form a snap-fitting recess 233 . When the first longitudinal extension portion 232 is inserted into the slot 130 , the snap-fitting recess 233 is snap-fitted to the edge of the first seat plate 120 .

[0103] In this embodiment, the first connection part 230 connected to the transverse enclosure part 220 can be made of a material with a certain elastic deformation ability, such as plastic. When the first longitudinal extension parts 232 of the two first connection parts 230 connected to the first backrest part 210 are inserted into the slot 130 from the rear of the first seat plate 120, and the corresponding engaging recess 233 thereof is engaged with the rear edge of the first seat plate 120, the first connection part 230 connected to the transverse enclosure part 220 can undergo a certain elastic deformation and pass over the front edge of the first seat plate 120 and be inserted into the slot 130 on the front side of the first seat plate 120, and the corresponding engaging recess 233 thereof is engaged with the front edge of the first seat plate 120. In other embodiments, the first connection part 230 connected to the first backrest part 210 can also be made of a material with a certain elastic deformation ability.

[0104] Furthermore, the first connection portion 230 connected to the transverse enclosing portion 220 can also be used to resist the crotch of an infant to prevent the infant from sliding off the high chair.

[0105] Specifically, Figure 7 and Fig. 9As shown, the first seat plate 120 can be a plate-like structure made of wood or hard plastic, and the lower surface of the first seat plate 120 can be fixed with a mounting frame 117 made of plastic or steel material, and the mounting frame 117 and the first seat plate 120 form a slot 130 for inserting the first longitudinal extension portion 232 (described later). In this embodiment, three slots 130 are correspondingly provided, two of which are provided on the rear side of the first seat plate 120, and the other is provided on the front side of the first seat plate 120. The three slots 130 all extend in the longitudinal direction of the first seat plate 120. Of course, in other embodiments, the setting position and number of the slots 130 can also be adjusted as needed. For example, the slots 130 can also extend in the transverse direction of the first seat plate 120, and the setting position of the first connecting portion 230 is adjusted accordingly.

[0106] like Figures 10 to 12 As shown, the second connection portion 320 includes a second vertical extension portion 321 and a second longitudinal extension portion 322 which are connected to each other and arranged at an angle to each other. In this embodiment, the second vertical extension portion 321 and the second longitudinal extension portion 322 are both rod-shaped structures, and the diameter of the portion of the second longitudinal extension portion 322 away from the second vertical extension portion 321 is smaller than the diameter of the other portions of the second longitudinal extension portion 322, so as to form an insertion end 3221 which can be inserted into the insertion channel 150 of the seat frame 100. One end of the second vertical extension portion 321 away from the second longitudinal extension portion 322 is fixedly connected to the second backrest portion 310.

[0107] Specifically, the second backrest portion 310 is roughly an arc-shaped plate-like structure. There are two second connecting portions 320 and they are arranged at intervals, and two plug-in channels 150 are correspondingly arranged. In this embodiment, two plug-in channels 150 are formed in the mounting frame 117, and the two plug-in channels 150 are both extended along the front-to-back direction of the first seat plate 120. Specifically, the two slots 130 arranged on the rear side of the first seat plate 120 mentioned above are located between the two plug-in channels 150. In other embodiments, the setting position and number of the plug-in channels 150 can also be adjusted as needed. For example, the two plug-in channels 150 can be arranged along the transverse direction of the first seat plate 120, and the setting positions of the two second connecting portions 320 can be adjusted accordingly. Alternatively, the two slots 130 can extend along the longitudinal direction of the first seat plate 120, and the two plug-in channels 150 can extend along the transverse direction of the first seat plate 120.

[0108] like Fig.11 and Fig.12As shown, the seat frame 100 is further provided with a locking mechanism 160 for selectively locking the second connecting portion 320 relative to the first seat plate 120. Specifically, the locking mechanism 160 includes a locking member 161, a releasing member 162 and a first restoring member 163. The locking member 161 is movably provided on the seat frame 100, and a locking hole 3222 is provided on the second longitudinal extension portion 322. The locking member 161 has a first locking position and a first releasing position. When the second longitudinal extension portion 322 is inserted into the insertion channel 150, if the locking member 161 is in the first locking position, the locking member 161 can be inserted into the locking hole 3222; if the locking member 161 is in the first releasing position, the locking member 161 can be separated from the locking hole 3222. The releasing member 162 can be operated to drive the locking member 161 to move to the first releasing position. The first restoring member 163 is suitable for biasing the locking member 161 to move toward the first locking position.

[0109] Furthermore, the second longitudinal extension portions 322 of the two second connection portions 320 connected to the second backrest portion 310 are each provided with a locking hole 3222, and two corresponding locking mechanisms 160 are provided to respectively engage with the two locking holes 3222. In this embodiment, the two locking holes 3222 are arranged opposite to each other, and the two locking mechanisms 160 are located between the two second longitudinal extension portions 322. The following description will be made by taking one of the locking mechanisms 160 as an example.

[0110] like Fig.11 and Fig.12As shown, the release member 162 is generally a rod-shaped structure, and an operating protrusion 1621 is provided in the approximately middle part of the release member 162. A long strip-shaped mounting groove 170 is formed between the mounting frame 117 or the mounting frame 117 and the first seat plate 120, and the mounting groove 170 generally extends along the transverse direction of the first seat plate 120, that is, the extending direction of the mounting groove 170 is generally perpendicular to the extending direction of the insertion channel 150. The release member 162 is disposed in the mounting groove 170 and can move along the extending direction of the mounting groove 170. An operating opening 171 is provided on the groove wall of the mounting groove 170, and the operating protrusion 1621 of the release member 162 extends out of the mounting groove 170 through the operating opening 171 so as to be operated. The release member 162 has a first end 1622 and a second end 1623. The locking member 161 is pivotally connected to the first end 1622 of the release member 162. The locking member 161 has a hook portion 1611 away from the first end 1622. A through hole 151 is provided on the side wall of the plug-in channel 150, and the mounting groove 170 is connected to the plug-in channel 150 through the through hole 151. When the second longitudinal extension portion 322 is inserted into the plug-in channel 150, the through hole 151 is opposite to the locking hole 3222. At this time, if the locking member 161 is in the first locking position, the locking member 161 is inserted into the locking hole 3222 through the through hole 151. In this embodiment, the first reset member 163 is a spring. In this embodiment, a sleeve protrusion 1624 is provided at the second end 1623 of the release member 162. The first reset member 163 is disposed in the mounting groove 170, one end of the first reset member 163 is sleeved on the sleeve protrusion 1624 and abuts against the second end 1623 of the release member 162, and the other end abuts against the groove wall of the mounting groove 170.

[0111] The specific working principle of the locking mechanism 160 is as follows:

[0112] Located in Fig.11 and Fig.12 Taking the locking mechanism 160 on the right side of the middle as an example, when the second backrest assembly 300 needs to be removed from the seat frame 100, the second backrest assembly 300 is moved in a direction away from the locking hole 3222 (i.e. Fig.11 or Fig.12 When the operating protrusion 1621 of the release member 162 is moved in the first direction D1 (as shown in FIG. 1 ), the locking member 161 can be driven to move along the first direction D1 and at the same time Fig.12 The second longitudinal extension portion 322 is pivoted in the second direction D2 shown and disengaged from the locking hole 3222. In this way, the second longitudinal extension portion 322 can be removed from the insertion channel 150, and the second backrest assembly 300 is disassembled. After the second backrest assembly 300 is disassembled, the external force applied to the operating protrusion 1621 is removed, and the release member 162 moves in the opposite direction of the first direction D1 under the elastic force of the first reset member 163, and the locking member 161 is driven by the release member 162 to switch back to the first locking position.

[0113] When the second backrest assembly 300 needs to be installed on the seat frame 100, the second longitudinal extension portion 322 of the second backrest assembly 300 is inserted into the insertion channel 150. The hook portion 1611 is provided with a push ramp 1612. During the insertion process, the second longitudinal extension portion 322 pushes the push ramp 1612 to make the hook portion 1611 pivot out of the locking hole 3222, so that the locking member 161 is in the first unlocking position. When the second longitudinal extension portion 322 is inserted into place, the through hole 151 is opposite to the locking hole 3222 of the second longitudinal extension portion 322, and the second longitudinal extension portion 322 no longer has a pushing effect on the pushing inclined surface 1612. At this time, the release member 162 moves in the opposite direction of the first direction D1 under the action of the elastic force of the first reset member 163, and the locking member 161 is switched to the first locking position again under the drive of the release member 162, that is, the locking member 161 is inserted into the locking hole 3222 of the second longitudinal extension portion 322 through the through hole 151, so that the second backrest assembly 300 is fixed to the seat frame 100.

[0114] Furthermore, the mounting frame 117 is further provided with a tubular reinforcement member 180 to provide a more stable support for the first seat plate 120. In this embodiment, there are two reinforcement members 180 and they are spaced apart along the front-to-back direction of the first seat plate 120.

[0115] In an embodiment not shown, it is not necessary to set the slot 130 and the plug-in channel 150 at the bottom of the first seat plate 120 at the same time, that is, only the slot 130 or the plug-in channel 150 can be set at the bottom of the first seat plate 120. Here, for the sake of distinction, the slot 130 or the plug-in channel 150 is recorded as a coupling groove, which can be plugged and matched with the first longitudinal extension portion 232 or the second longitudinal extension portion 322 at the same time. Of course, in this embodiment, the shapes of the first longitudinal extension portion 232 and the second longitudinal extension portion 322 should also be roughly the same, for example, they can both be plate-shaped or rod-shaped, so that they can both be inserted into the coupling groove. In this way, the step of processing the slot 130 or the plug-in channel 150 can be omitted, the process is simplified, and the cost is saved. In this embodiment, the extension direction of the coupling groove is parallel to the plane where the first seat plate 120 is located, and the coupling groove extends along the longitudinal direction of the first seat plate 120.

[0116] Furthermore, if Fig.13As shown, the first support frame 110 includes a seat frame 111 and a plurality of legs 112. The seat frame 111 includes a support base 1111 and a leg connection portion 1112 that are connected to each other. In this embodiment, there are two support bases 1111, which are fixed to the left and right sides of the first seat plate 120 respectively. The two ends of the support base 1111 are respectively connected to the two leg connection portions 1112 to form a roughly U-shaped structure. In this embodiment, the support base 1111 and the two leg connection portions 1112 are an integrally formed structure. The ends of the two leg connection portions 1112 that are away from the support base 1111 are respectively detachably connected to one leg 112. The connection structure between one leg connection portion 1112 and the corresponding leg 112 is taken as an example for specific description.

[0117] like Fig.14 and Fig.15 As shown, one of the leg 112 and the leg connecting portion 1112 is provided with a plug connector 1121, and the other is provided with a plug sleeve 1112a, and the plug connector 1121 is inserted into the plug sleeve 1112a and fixedly connected by a fastener 113 that penetrates the plug connector 1121 and the plug sleeve 1112a. In this embodiment, the leg 112 is provided with a plug connector 1121, and the leg connecting portion 1112 is provided with a plug sleeve 1112a, and the fastener 113 can be a bolt. In this way, a detachable connection between the leg 112 and the leg connecting portion 1112 can be achieved.

[0118] like Fig.16 As shown, a foot pad 114 is also provided at one end of the leg 112 away from the leg connection portion 1112, that is, at the bottom end of the leg 112. The foot pad 114 is made of rubber or other materials and has a certain anti-slip and noise-reducing effect. A matching protrusion 1141 is provided on the foot pad 114, and a matching groove 1122 is provided at the bottom end of the leg 112. The foot pad 114 is fixed to the bottom end of the leg 112 by the interference fit between the matching protrusion 1141 and the matching groove 1122.

[0119] Furthermore, if Fig.17 As shown, the tray portion 400 includes a tray body 410 and tray connecting portions 420 protruding from both lateral sides of the tray body 410. The two tray connecting portions 420 are provided with plug-in ends 421, and the enclosure portion 220 or the first backing portion 210 is provided with two plug-in slots 241 that can be plugged and matched with the plug-in ends 421.

[0120] Furthermore, if Fig.18As shown, a connecting finger 422 is also provided at the approximate middle of each plate connection portion 420. A connecting groove 223 is provided at the upper edge of the enclosure portion 220 or the first backrest portion 210. When the plug-in ends 421 of the two plate connection portions 420 are inserted into the two plug-in grooves 241, the engaging protrusions 4221 of the connecting fingers 422 can engage with the connecting grooves 223, thereby firmly mounting the plate portion 400 on the first backrest assembly 200.

[0121] Furthermore, if Fig.18 and Fig.19 As shown, a footrest 115 is also provided between the two legs 112 located at the front side of the first support frame 110 to facilitate placing the feet of children or adults when sitting. The connection position of the footrest 115 relative to the two legs 112 is adjustable, that is, the height position of the footrest 115 is adjustable to accommodate children or adults of different body sizes. Specifically, the footrest 115 includes a pedal body 1151 and a pedal connector 1152 connected to both ends of the pedal body 1151. The pedal body 1151 is a rectangular plate-like structure, and the pedal connector 1152 is roughly L-shaped, including a first connector 1152a and a second connector 1152b connected to each other. A plurality of adjustment holes 1123 are provided on each leg 112, and the plurality of adjustment holes 1123 on the two legs 112 on the front side of the first support frame 110 are arranged relative to each other.

[0122] Taking the structure on one side of the pedal body 1151 as an example, the first connecting member 1152a is fixed to the bottom of one side of the pedal body 1151, and the second connecting member 1152b is detachably connected to the corresponding side leg 112. An adjusting member 116 passes through the second connecting member 1152b and is inserted into one of the multiple adjusting holes 1123 to fix the pedal body 1151 at a certain position of the leg 112.

[0123] Specifically, Fig. 20 As shown, the adjustment member 116 is generally in a T-shaped structure, including an operating knob 1161 and a fastening bolt 1162 that are connected to each other and arranged at an angle. A fastening nut (not shown in the drawings) can be embedded in the adjustment hole 1123, and the nut is provided with a first thread (not shown in the drawings). The end of the fastening bolt 1162 away from the operating knob 1161 is provided with a second thread 1162a that can be threadedly engaged with the first thread. In this way, by rotating the operating knob 1161, the fastening bolt 1162 can be tightened and fixed in a certain adjustment hole 1123 or the fastening bolt 1162 can be screwed out of a certain adjustment hole 1123, so that the second connecting member 1152b can be detachably connected to the support leg 112, so that the height position of the pedal body 1151 relative to the support leg 112 can be adjusted.

[0124] In this embodiment, three adjustment holes 1123 are provided on each leg 112, that is, the footrest 115 can be fixed at three different height positions relative to the leg 112, namely, the first height position, the second height position and the third height position, and the heights of these three height positions decrease in sequence. When the high chair is in the first use mode, the footrest 115 is fixed at the first height position. When the high chair is in the second use mode, the footrest 115 is fixed at the second height position. When the high chair is in the third use mode, the footrest 115 is fixed at the third height position.

[0125] In other embodiments, the number of height positions of the foot pedal 115 may be more than three or less than three, so as to be adjusted accordingly according to the body shape of the user to meet more usage requirements.

[0126] In other embodiments, the high chair does not necessarily have to include the first backrest assembly 200 and the second backrest assembly 300. The high chair may only have the first backrest assembly 200 or the second backrest assembly 300, that is, the user may only need the first use mode and the third use mode, or only need the second use mode or the third use mode. Alternatively, the high chair may only include the seat frame 100, that is, the user may only need the third use mode. In this way, the high chair can have different component structures according to the needs of the user. The seat frame 100 of the high chair may be provided with a backrest joint for mounting the first backrest assembly 200 and the second backrest assembly 300. The backrest joint can be engaged with both the first backrest assembly 200 and the second backrest assembly 300. Alternatively, the backrest joint may also include a first joint for engaging with the first backrest assembly 200 and a second joint for engaging with the second backrest assembly 300, respectively.

[0127] In another embodiment, Figure 21 to Figure 23 As shown, the high chair may also include a second support frame 500, a second seat plate 600, a first backrest assembly 200 and a second backrest assembly 300. The second support frame 500 can be connected to one of the first backrest assembly 200 and the second backrest assembly 300. The second support frame 500 includes a first support frame 510 and a second support frame 520, and one end of the first support frame 510 is pivotally connected to the second support frame 520. The second seat plate 600 is disposed between the first support frame 510 and the second support frame 520.

[0128] like Fig.21 and Fig. 22As shown, the first backrest assembly 200 can be a child seat, including a first backrest portion 210, a seat portion 240 and a leg rest portion 250. The first backrest portion 210 includes a backrest body 211 and side baffles 212 connected to the left and right sides of the backrest body 211. The seat portion 240 is connected to the lower side of the first backrest portion 210 and forms a seating space 101 for accommodating children with the first backrest portion 210. The leg rest portion 250 is connected to the front side of the seat portion 240 for the child to place his feet. In this embodiment, the child seat is an integrated structure. In other embodiments, the child seat can also be formed by connecting the first backrest portion 210, the seat portion 240 and the leg rest portion 250 by welding, welding, etc.

[0129] Furthermore, the first backrest assembly 200 is used to be detachably and pivotally connected to the second support frame 500, specifically, the two side guard plates 212 of the first backrest assembly 200 are detachably and pivotally connected to the pivotal joint of the first support frame 510 and the second support frame 520. When the first backrest assembly 200 is installed on the second support frame 500, the first backrest assembly 200 can be pivoted relative to the second support frame 500 to form different usage modes of the high chair. For example, Fig.21 As shown, when the first backrest assembly 200 is mounted on the second support frame 500 and is located at the first pivot position, the backrest body 211 is tilted backward relative to the second support frame 500, and the high chair is in the first use mode. The first use mode is the newborn mode, which is suitable for infants under about 6 months old. Infants of this age group generally do not have the ability to sit up and eat independently because their cervical spine is not yet fully developed. Therefore, the high chair in the first use mode can be used as a comfort seat for the baby, and the baby is roughly in a reclining posture, so as to protect the baby's cervical spine. The first backrest portion 210 can be provided with a five-point safety belt to fix the baby in the riding space 101.

[0130] like Fig. 22 As shown, when the first backrest assembly 200 is mounted on the second support frame 500 and is located at the second pivot position, the backrest body 211 is relatively upright and the high chair is in the second usage mode. The second usage mode is the dining chair mode, which is suitable for infants and young children aged about 6 months to 3 years old to eat. In this second usage mode, the dining tray portion 400 can also be installed in a detachable or non-detachable manner to facilitate the placement of infant tableware and food. The dining tray portion 400 in this embodiment also includes a dining tray body 410 and a dining tray connecting portion 420 located at both ends of the rear side of the dining tray body 410. In this embodiment, the outer sides of the two side baffles 212 are provided with an insertion tube 2122, and the insertion tube 2122 has an insertion cavity 2123 (see Fig.21), so that the detachable connection between the dining tray portion 400 and the first backrest assembly 200 can be achieved. The dining tray portion 400 also includes a stopper 423 located below the dining tray body 410, and the stopper 423 can be used to resist the crotch of the infant to prevent the infant from sliding off the high chair.

[0131] like Fig.23 As shown, when the second backrest assembly 300 is installed on the second support frame 500, the high chair is in the third use mode. The second backrest assembly 300 is generally a U-shaped rod structure, and the two ends of the U-shaped rod are detachably connected to the pivotal joints of the first support frame 510 and the second support frame 520, respectively, to support the back of the user. The third use mode is a growth chair mode, which is mainly suitable for children aged about 3 to 12 years old. Of course, children over 12 years old or adults can also use it.

[0132] Further, refer to Fig.30 When the high chair is in the third use mode, the pivot member 700 is in the second pivot position, and the two ends of the second backrest assembly 300 are respectively inserted and fixed in the mounting recesses 710 of the two pivot members 700. Of course, in other embodiments, when the high chair is in the third use mode, the pivot member 700 may also be in a third pivot position different from the first pivot position and the second pivot position.

[0133] It is worth noting that Fig.21 and Fig. 22 As shown, when the first backrest assembly 200 is mounted on the second support frame 500, the first support frame 510 is located in front of the second support frame 520. When the second backrest assembly 300 is mounted on the second support frame 500, the second support frame 520 is located in front of the first support frame 510. Of course, in other embodiments, it can also be arranged that no matter whether the first backrest assembly 200 or the second backrest assembly 300 is mounted on the second support frame 500, the first support frame 510 is located in front of or behind the second support frame 520.

[0134] Furthermore, if Figure 24 to Figure 26 As shown, the second support frame 500 can be folded to save storage or transportation space, that is, the second support frame 500 can be switched between the unfolded state and the folded state. Fig.23As shown, the first support frame 510 includes two first support rods 511 arranged on the left and right sides of the second seat plate 600 and a first connecting rod 512 connected between the two first support rods 511. The second support frame 520 includes two second support rods 521 arranged on the left and right sides of the second seat plate 600 and a second connecting rod 522 connected between the two second support rods 521. Each first support rod 511 is pivotally connected to a second support rod 521 on the corresponding side. In this embodiment, the two first support rods 511 are straight rods, and the two second support rods 521 are curved rods with a certain curvature on the upper part. In this way, when the first backrest assembly 200 is installed on the second support frame 500, the two second support rods 521 will not protrude from the front of the first backrest assembly 200 and interfere with the first backrest assembly 200, and when the second backrest assembly 300 is installed on the second support frame 500, the parts of the two second support rods 521 with a certain curvature can also form an armrest portion that is easy to grasp and play a certain protective role. A footrest 115 is also connected between the two second support rods 521. When the high chair is in the third use mode, the footrest 115 can be used to support the user's feet. Of course, in other embodiments, the two first support rods 511 and the two second support rods 521 can also be straight rods or curved rods.

[0135] like Fig. 27 As shown, the second support frame 500 further includes a first connecting frame 530 and a second connecting frame 540 for supporting below the second seat plate 600. One side of the first connecting frame 530 is pivotally connected to the first support frame 510, one side of the second connecting frame 540 is pivotally connected to the second support frame 520, the other side of the first connecting frame 530 is pivotally connected to the other side of the second connecting frame 540, and the second seat plate 600 is fixedly connected to the first connecting frame 530. When the second support frame 500 is in the unfolded state, the first connecting frame 530 and the second connecting frame 540 are approximately in the same plane, and the second seat plate 600 is erected above the first connecting frame 530 and the second connecting frame 540.

[0136] Specifically, the first connecting frame 530 and the second connecting frame 540 are both roughly H-shaped frame structures. The first connecting frame 530 includes a first cross bar 531 extending roughly along the lateral direction of the second seat plate 600 and two first longitudinal bars 532 connected to both ends of the first cross bar 531 and extending roughly along the longitudinal direction of the second seat plate 600. The second connecting frame 540 includes a second cross bar 541 extending roughly along the left-right direction of the second seat plate 600 and two second longitudinal bars 542 connected to both ends of the second cross bar 541 and extending roughly along the front-back direction of the second seat plate 600. One ends of the two first longitudinal bars 532 are respectively pivotally connected to the first connecting rod 512 through two pivot members 560, and the other ends of the two first longitudinal bars 532 are respectively pivotally connected to one ends of the two second longitudinal bars 542 through two pivot members 560. The other ends of the two second longitudinal bars 542 are respectively pivotally connected to the second cross bar 541. The first connecting frame 530 is fixed below the second seat plate 600, specifically the first cross bar 531 is fixed below the second seat plate 600, so that when the first connecting frame 530 is pivoted and folded, it can drive the second connecting frame 540 to pivot and fold. The first cross bar 531 is arranged away from the first connecting rod 512 to provide better support for the second seat plate 600. The second cross bar 541 is arranged close to the second connecting rod 522.

[0137] Furthermore, if Fig.28 and Fig.29As shown, the second support frame 500 in this embodiment also includes a clamping mechanism 550. The clamping mechanism 550 includes a first clamping portion 551 and a second clamping portion 552. The first clamping portion 551 is operably arranged on the second seat plate 600. The first clamping portion 551 includes a clamping body 5511 and an operating handle 5512 that are connected to each other. In this embodiment, the first clamping portion 551 is an integrally formed structure. One end of the clamping body 5511 can be connected to the rear edge of the second seat plate 600 by, for example, screws. The clamping body 5511 has a locking groove 5511a. The second clamping portion 552 is arranged on the second support frame 520, and specifically, the second clamping portion 552 is fixed to the approximate middle part of the second cross bar 541. The first engaging portion 551 can be engaged with the second engaging portion 552 to lock the second support frame 500 in the expanded state, that is, the second connecting rod 522 can be engaged in the locking groove 5511a to lock the second support frame 500 in the expanded state. The first engaging portion 551 can be operated to disengage from the second engaging portion 552. Specifically, the first engaging portion 551 is made of a material having a certain elastic deformation ability, such as plastic. When the operating handle 5512 is moved along the D3 direction, the second connecting rod 522 can be disengaged from the locking groove 5511a, thereby releasing the lock of the second support frame 500 in the expanded state. After releasing the lock of the expanded state, the second support frame 500 can be folded (such as by pivoting the first connecting frame 530 and the second connecting frame 540, and the relative pivoting of the first support frame 510 and the second support frame 520). Figure 24 to Figure 26 shown).

[0138] Furthermore, if Fig.30 and Fig.31 As shown, the high chair in this embodiment further includes a pivot member 700. The pivot member 700 is rotatably disposed on the second support frame 500, one of the pivot member 700 and the first backrest assembly 200 is provided with a mounting recess 710, and the other is provided with a mounting protrusion 2121, and the mounting recess 710 and the mounting protrusion 2121 cooperate to rotatably mount the first backrest assembly 200 to the second support frame 500. Similarly, the mounting structure of the pivot member 700 and the second backrest assembly 300 is also similar to this.

[0139] Specifically, the upper end of each first support rod 511 is provided with a first mounting seat 513, and the upper end of each second support rod 521 is provided with a second mounting seat 523 pivotally connected to the first mounting seat 513 on the corresponding side. There are two pivot members 700 and they are rotatably arranged on the second mounting seats 523. In this embodiment, the second mounting seat 523 is pivotally connected to the inner side of the first mounting seat 513, that is, the first mounting seat 513 faces the side of the second seat plate 600, and the pivot member 700 is pivotally connected to the inner side of the second mounting seat 523. In this way, the two pivot members 700 are arranged opposite to each other. The two pivot members 700 are provided with mounting recesses 710. The two side baffles 212 of the first backrest assembly 200 are provided with mounting protrusions 2121 that can respectively cooperate with the two mounting recesses 710 to rotatably mount the first backrest assembly 200 to the second support frame 500.

[0140] The following specifically describes the related structure with reference to the mounting recess 710 and the mounting protrusion 2121 on one side:

[0141] like Fig.30 As shown, the mounting recess 710 is a groove-shaped structure with a substantially rectangular cross section. The mounting recess 710 has a first groove wall 711 and a second groove wall 712 disposed opposite to each other and a third groove wall 713 connected to one end of the first groove wall 711 and the second groove wall 712. The other ends of the first groove wall 711 and the second groove wall 712 form an opening 714. A circular engaging groove 715 is provided at the approximate middle of the groove bottom of the mounting recess 710. Fig.31 As shown, the mounting protrusion 2121 is a substantially rectangular housing structure matching the mounting recess 710, and a receiving cavity 2121a is formed in the mounting protrusion 2121 (see Fig.33 The mounting protrusion 2121 can be inserted into the mounting recess 710 through the opening 714 .

[0142] Furthermore, if Figure 32 to Figure 34 As shown, the high chair is further provided with a disassembly mechanism 800 for realizing the detachable installation between the first backrest assembly 200 and the second support frame 500. The disassembly mechanism 800 is at least partially arranged in the accommodating cavity 2121a of the mounting protrusion 2121, and the disassembly mechanism 800 specifically includes a first operating member 810, a locking member 820 and a second resetting member 830.

[0143] Specifically, the first operating member 810 is at least partially movably disposed in the accommodating cavity 2121a. The first operating member 810 includes an operating portion 811 and a driving portion 812 that are connected to each other. In the present embodiment, the first operating member 810 is an integrally formed structure. An operating hole 2121b communicating with the accommodating cavity 2121a is provided at one end of the mounting protrusion 2121, and an end of the operating portion 811 away from the driving portion 812 can extend out of the operating hole 2121b to be pressed. The end of the driving portion 812 away from the operating portion 811 is in a fork-shaped structure and has two fork legs 8121. Both fork legs are provided with a driving inclined surface 8122.

[0144] Specifically, the engaging member 820 is movably disposed on the mounting protrusion 2121. In this embodiment, the engaging member 820 is at least partially disposed in the accommodating cavity 2121a. The engaging member 820 includes an engaging body 821 and protruding columns 822 protruding from both sides of the engaging body 821. The outer side wall 2121c of the mounting protrusion 2121, that is, the side of the mounting protrusion 2121 away from the side baffle 212 is provided with an engaging hole 2121d connected to the accommodating cavity 2121a. The engaging member 820 can move between the second locking position and the second unlocking position along the direction close to or away from the outer side wall 2121c of the mounting protrusion 2121, that is, the transverse direction of the first backrest assembly 200. The engaging body 821 has an engaging end 8211. When the engaging member 820 is in the second locking position, the engaging end 8211 of the engaging body 821 can extend out of the engaging hole 2121d and engage with the engaging groove 715. The two driving inclined surfaces 8122 of the driving part 812 respectively abut against the bosses 822 on both sides of the engaging body 821. The two driving inclined surfaces 8122 intersect and are not perpendicular to the moving direction of the engaging member 820 (i.e., the lateral direction of the first backrest assembly 200). The operating part 811 of the first operating member 810 can be pressed to respectively push the bosses 822 on both sides of the engaging body 821 through the two driving inclined surfaces 8122, so that the engaging member 820 moves to the second unlocking position. When the engaging member 820 is in the second unlocking position, the engaging end 8211 of the engaging body 821 retracts into the accommodating cavity 2121a to disengage from the engaging groove 715. At this time, the mounting protrusion 2121 can be pulled out from the mounting recess 710, so that the first backrest assembly 200 can be disassembled from the second support frame 500.

[0145] Specifically, Fig.33As shown, the second reset member 830 is suitable for biasing the engaging body 821 to move toward the second locking position. In this embodiment, the second reset member 830 is a spring arranged in the accommodating chamber 2121a. The end of the engaging body 821 away from the engaging end 8211 is provided with a reset groove 8212. The second reset member 830 is at least partially accommodated in the reset groove 8212 and one end is against the bottom of the reset groove 8212. The other end of the second reset member 830 is against the inner side wall 2121e (i.e., the side wall opposite to the outer side wall 2121c) of the mounting protrusion 2121. The provision of the reset groove 8212 helps to prevent the second reset member 830 from shifting during the biasing process.

[0146] Furthermore, if Fig.35 As shown, both sides of the mounting protrusion 2121 are also provided with strip-shaped limiting protrusions 2121f, and the first groove wall 711 and the second groove wall 712 of the mounting recess 710 are also provided with limiting grooves 716 that can respectively cooperate with the two limiting protrusions 2121f. When the mounting protrusion 2121 is inserted into the mounting recess 710, the limiting protrusion 2121f is correspondingly inserted into the corresponding limiting groove 716. The cooperation between the limiting protrusion 2121f and the limiting groove 716 can, on the one hand, provide a guiding effect for the process of the mounting protrusion 2121 being inserted into the mounting recess 710, and on the other hand, can also make the first backrest assembly 200 more firmly fixed on the second support frame 500, so as to prevent the first backrest assembly 200 from shaking left and right.

[0147] Furthermore, if Fig.33 and Fig.34 As shown, a fixing block 2124 is inserted into the installation cavity 102 of the installation protrusion 2121 , and the fixing block 2124 is used to position the disassembly mechanism 800 .

[0148] Furthermore, the high chair further comprises an angle adjustment mechanism 900 for adjusting the pivot position of the first backrest assembly 200 relative to the second support frame 500, and also for adjusting the rotation angle of the pivot member 700 so that the pivot member 700 is suitable for mounting the second backrest assembly 300. Figure 36 to Figure 38 As shown, the angle adjustment mechanism 900 specifically includes a limiting member 910 , a second operating member 920 , a second limiting portion 930 and a third restoring member 940 .

[0149] Specifically, the first mounting seat 513 has a first mounting groove 5131 which is roughly cylindrical, and the second mounting seat 523 has a second mounting groove 5231 which is roughly cylindrical. The first mounting seat 513 and the second mounting seat 523 are buckled to form the mounting cavity 102. The limiting member 910 is movably arranged in the mounting cavity 102. The limiting member 910 is movable between a third locking position and a third unlocking position, and a first limiting portion 911 is provided at the edge of the limiting member 910. When the limiting member 910 is in the third locking position, the second limiting portion 930 is engaged with the first limiting portion 911, and when the limiting member 910 is in the third unlocking position, the second limiting portion 930 is disengaged from the first limiting portion 911.

[0150] like Fig.39As shown, the stopper 910 can be a locking gear 910', and a plurality of locking protruding teeth 912 are arranged around the outer edge of the locking gear 910', and a locking groove 911' is formed between every two locking protruding teeth 912, and the locking groove 911' forms a first stopper 911. A mounting shaft 5231a is convexly arranged at the approximate center of the groove bottom of the second mounting groove 5231. A mounting hole 913 is provided in the approximate middle of the stopper 910. The stopper 910 can move along the axial direction of the second mounting seat 523 through the insertion and matching of the mounting shaft 5231a and the mounting hole 913. In this embodiment, the plurality of locking protruding teeth 912 include two first protruding teeth 9121, two second protruding teeth 9122 and two third protruding teeth 9123. The two first protruding teeth 9121 and the two second protruding teeth 9122 have the same size and are both larger than the size of the third protruding teeth 9123. Two first protruding teeth 9121 and two second protruding teeth 9122 are evenly arranged at the outer edge of the engaging member 820 in the circumferential direction. The two first protruding teeth 9121 are symmetrically arranged relative to the mounting hole 913, and the two second protruding teeth 9122 are symmetrically arranged relative to the mounting hole 913. One third protruding tooth 9123 is arranged between one of the first protruding teeth 9121 and one of the second protruding teeth 9122, and another third protruding tooth 9123 is arranged between another first protruding tooth 9121 and another second protruding tooth 9122, that is, the two third protruding teeth 9123 are also symmetrically arranged relative to the mounting hole 913. Each third protruding tooth 9123 forms a locking groove 911' with its adjacent first protruding tooth 9121 or second protruding tooth 9122. Among them, the engaging groove 911' formed between each third protruding tooth 9123 and the adjacent first protruding tooth 9121 is a first groove 9111, and the engaging groove 911' formed between each third protruding tooth 9123 and the adjacent second protruding tooth 9122 is a second groove 9112, that is, the stopper 910 has two first grooves 9111 symmetrically arranged relative to the mounting hole 913 and two second grooves 9112 symmetrically arranged relative to the mounting hole 913. In this embodiment, the engaging grooves 911' are provided with two groups, namely the first groove 9111 and the second groove 9112; in other embodiments, the engaging grooves 911' may also be provided with multiple groups, for example, further including a third groove (not shown), to meet more rotation angle requirements. Exemplarily, the third groove may be provided on the two first protruding teeth 9121 or the two second protruding teeth 9122.

[0151] A guide groove 914 is formed between the adjacent first protruding teeth 9121 and the second protruding teeth 9122, that is, the stopper 910 is further provided with two guide grooves 914 symmetrically arranged relative to the mounting hole 913. The bottom of the second mounting groove 5231 is provided with two guide protrusions 5231b extending in a direction parallel to the mounting axis 5231a, and each guide protrusion 5231b cooperates with the corresponding guide groove 914 so that the movement of the stopper 910 is limited to the direction parallel to the mounting axis 5231a, and cannot rotate relative to the first mounting seat 513 and the second mounting seat 523.

[0152] Specifically, Fig.39 As shown, the second operating member 920 is specifically an operating button, including an operating body 921 that is roughly in the shape of a circular sheet and a plurality of operating protrusions 922 that are circumferentially arranged along the outer edge of the operating body 921. The plurality of operating protrusions 922 are arranged at an angle to the operating body 921. An operating groove 5132 is provided on one side of the first mounting seat 513 that faces away from the mounting cavity 102, and a plurality of plug holes 5133 that are in communication with the mounting cavity 102 are provided at the groove bottom edge of the operating groove 5132. The operating body 921 is movably arranged in the operating groove 5132, and the plurality of operating protrusions 922 can extend into the mounting cavity 102 through the plurality of plug holes 5133 respectively and abut against the stopper 910. The operating body 921 of the second operating member 920 can be pressed to move along the axial direction of the first mounting seat 513 and push the stopper 910 to move from the third locking position to the third unlocking position. An operation stopper 923 is disposed at one end of each operation protrusion 922 away from the operation body 921 , and the operation stopper 923 can abut against a surface of the bottom of the operation slot 5132 facing away from the operation slot 5132 to prevent the second operation member 920 from falling off the first mounting seat 513 .

[0153] Furthermore, if Fig.39As shown, the second limiting portion 930 is fixed to or integrally formed on a side of the pivot member 700 that faces away from the mounting recess 710. In this embodiment, the pivot member 700 is a roughly circular sheet-like structure, and there are two second limiting portions 930 that are symmetrically arranged relative to the center of the pivot member 700. In this embodiment, the second limiting portion 930 is a snap-fit ​​protrusion 930', and its structure is specifically described below by taking one of the snap-fit ​​protrusions 930' as an example. The snap-fit ​​protrusion 930' includes a connecting arm 931 and a snap-fit ​​arm 932 that are arranged at an angle. One end of the connecting arm 931 is fixed to a side of the pivot member 700 that faces away from the mounting recess 710, and the other end of the connecting arm 931 is connected to one end of the snap-fit ​​arm 932. The other end of the snap-fit ​​arm 932 is a free end and extends toward the center direction of the pivot member 700. The second mounting seat 523 is provided with two arc-shaped limiting grooves 5232, and the locking arms 932 and at least a part of the connecting arms 931 of the two locking protrusions 930' extend into the mounting cavity 102 through the two limiting grooves 5232 respectively. When the pivot member 700 rotates relative to the second mounting seat 523, the two locking protrusions 930' move along the two limiting grooves 5232 respectively. When the limiting member 910 is in the third locking position, the two locking arms 932 are respectively engaged with the two first grooves 9111 or the two second grooves 9112. Specifically, when the two locking arms 932 are respectively engaged with the two first grooves 9111, the first backrest assembly 200 is located in the first pivot position (such as Fig.21 When the two engaging arms 932 are respectively engaged in the two second grooves 9112, the first backrest assembly 200 is located at the second pivot position (as shown in FIG. Fig. 22 In the present embodiment, when the two engaging arms 932 are respectively engaged in the two second grooves 9112, or the two ends of the second backrest assembly 300 are respectively inserted into the mounting recesses 710 of the two pivot members 700, the high chair is in the third usage mode. In other embodiments not shown, when the two engaging arms 932 are respectively engaged in the two third grooves (not shown), the second backrest assembly 300 is located in the third pivot position (not shown), and the high chair is in the third usage mode. When the limiting member 910 is in the third unlocking position, the limiting member 910 is located between the engaging arms 932 and the pivot member 700 and is released from the engaging arms 932.

[0154] Furthermore, if Figure 37 to Figure 39 As shown, the third reset member 940 is disposed between the second mounting seat 523 and the limiting member 910, and the third reset member 940 is suitable for biasing the limiting member 910 to move to the third locking position. In this embodiment, the third reset member 940 is a spring. The third reset member 940 is sleeved outside the mounting shaft 5231a and one end of the third reset member 940 abuts against the bottom of the first mounting groove 5131, and the other end abuts against the limiting member 910, so that the third reset member 940 can be prevented from shifting during the biasing process.

[0155] The working principle of the angle adjustment mechanism 900 is described in detail below:

[0156] When the first backrest assembly 200 is mounted on the second support frame 500 and the pivot position of the first backrest assembly 200 needs to be adjusted, for example, Fig.21 The first usage mode shown is adjusted to Fig. 22 In the second use mode shown, Fig.37 As shown, the operating body 921 of the second operating member 920 can be pressed along the fourth direction D4, so that the operating protrusion 922 of the second operating member 920 pushes the limiting member 910 to move along the fourth direction D4 from the third locking position to the third unlocking position, the third reset member 940 is compressed, and the limiting member 910 is located between the engaging arm 932 and the pivoting member 700, and the engaging arm 932 on the pivoting member 700 is disengaged from the first groove 9111 on the limiting member 910. At this time, the pivoting member 700 can be pivoted to the second pivot position relative to the second mounting seat 523, that is, the engaging arm 932 of the pivoting member 700 is opposite to the second groove 9112 of the limiting member 910. Then, the pressing force applied to the operating body 921 can be removed, and the limiting member 910, which has lost the pushing effect of the operating protrusion 922, can be reset to the third locking position under the elastic force of the third reset member 940, so that the engaging arm 932 of the pivot member 700 engages with the second groove 9112 of the limiting member 910, thereby maintaining the first backrest assembly 200 in the second pivot position.

[0157] When the high chair is Fig.21 The first usage mode shown is adjusted to Fig.23 In the third use mode shown, the working principle of the angle adjustment mechanism 900 is the same as that described above, except that after the pivot member 700 is adjusted to the second pivot position, the two ends of the second backrest assembly 300 need to be respectively inserted into the mounting recesses 710 of the two pivot members 700. In an embodiment not shown, when the high chair is in the third use mode, the pivot member 700 may also be in a third pivot position different from the first pivot position and the second pivot position, and the pivot member 700 may be adjusted to the third pivot position according to a principle similar to that described above.

[0158] Similar to the previous embodiment, the high chair does not necessarily have to include the first backrest assembly 200 and the second backrest assembly 300. The high chair may only have the first backrest assembly 200 or the second backrest assembly 300, that is, the user may only need the first use mode and the second use mode, or only need the third use mode. In this way, the high chair can have different composition structures according to the needs of the user.

[0159] The high chair described in one embodiment of the present invention has at least the following technical effects:

[0160] The high chair can be combined with the first backrest assembly 200 having the first backrest portion 210 and the enclosure portion 220 to form a first usage mode, thereby serving as a dining chair for infants and young children of relatively young ages (e.g., 6 months to 3 years old). The high chair can also be connected with the second backrest assembly 300 having the second backrest portion 310 to form a second usage mode, thereby serving as a growth chair for children of relatively young ages (e.g., 3 years old to 12 years old). The high chair can also be disconnected from the first backrest portion 210 and the second backrest portion 310, thereby serving as an adult chair for older children and adults (over 12 years old). In this way, the high chair can well meet the feeding needs of children or adults of different ages by switching between a variety of usage modes, and the usage scenarios are more extensive.

[0161] The high chair described in another embodiment of the present invention has at least the following technical effects:

[0162] The high chair can be used as a chair for newborns under 6 months old by combining with the first backrest assembly 200 having the seat portion 240 and the first backrest portion 210 and placing the first backrest assembly 200 in the first pivot position to form a first use mode. The high chair can also be used as a dining chair for infants and young children of lower age (e.g., 6 months to 3 years old) by combining with the first backrest assembly 200 having the seat portion 240 and the first backrest portion 210 and placing the first backrest assembly 200 in the second pivot position. The high chair can also be used as a growth chair for older children and adults (3 to 12 years old) by connecting with the second backrest assembly 300. In this way, the high chair can well meet the feeding needs of children or adults of different ages by switching between multiple use modes, and the use scenarios are more extensive.

[0163] 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.

[0164] 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 high chair, characterized in that: include: A seat frame, comprising a first support frame and a first seat plate mounted on the first support frame; A first backrest assembly, used for detachably connecting with the seat frame, the first backrest assembly comprising a first backrest portion, a surrounding portion and a first connecting portion for connecting with the seat frame; and A second backrest assembly, used for detachably connecting with the seat frame, the second backrest assembly comprising a second backrest portion and a second connecting portion used for connecting with the seat frame; Wherein, the seat frame can be connected to one of the first backrest assembly and the second backrest assembly, when the first backrest assembly is fixedly connected to the seat frame, the high chair is in a first usage mode; when the second backrest assembly is fixedly connected to the seat frame, the high chair is in a second usage mode; when neither the first backrest assembly nor the second backrest assembly is connected to the first seat plate, the high chair is in a third usage mode.

2. The high chair according to claim 1, characterized in that The enclosure portion includes a transverse enclosure extending along the transverse direction of the first backrest component and a lateral enclosure extending along the front-rear direction of the first backrest component, and the first connecting portion is provided on at least one of the transverse enclosure, the lateral enclosure and the first backrest portion.

3. The high chair according to claim 1, characterized in that: The first connecting portion includes a first vertical extension portion and a first longitudinal extension portion which are connected to each other and arranged at an angle to each other. A slot corresponding to the first longitudinal extension portion is arranged on the seat frame, and the first longitudinal extension portion is used to be inserted into the slot.

4. The high chair according to claim 3, characterized in that The first longitudinal extension portion is provided with elastic fingers, and the slot wall of the slot is provided with openings corresponding to the elastic fingers. When the first longitudinal extension portion is inserted into the slot, the elastic protrusion of the elastic finger can slide into the opening.

5. The high chair according to claim 3, characterized in that: The connection between the first longitudinal extension portion and the first vertical extension portion is bent to form a clamping recess. When the first longitudinal extension portion is inserted into the slot, the clamping recess is clamped to the edge of the seat frame.

6. The high chair according to claim 1, characterized in that: The second connecting portion includes a second vertical extension portion and a second longitudinal extension portion which are connected to each other and arranged at an angle to each other, an end of the second vertical extension portion away from the second longitudinal extension portion is fixedly connected to the second backrest portion, and an end of the second longitudinal extension portion away from the first vertical extension portion is used to be inserted into the insertion channel of the seat frame.

7. The high chair according to claim 6, characterized in that The seat frame further comprises a locking mechanism, wherein the locking mechanism comprises a locking member movably disposed on the seat frame, a locking hole is disposed on the second longitudinal extension portion, the locking member has a first locking position and a first unlocking position, and when the second longitudinal extension portion is inserted into the insertion channel, if the locking member is in the first locking position, the locking member can be inserted into the locking hole; If the locking member is in the first unlocking position, the locking member can be disengaged from the locking hole.

8. The high chair according to claim 7, characterized in that The locking mechanism further comprises a release member drivingly connected to the locking member, wherein the release member can be operated to drive the locking member to move to the first release position.

9. The high chair according to claim 8, characterized in that The locking mechanism further includes a first return member adapted to bias the locking member to move toward the first locking position.

10. The high chair according to claim 1, characterized in that The first support frame includes a plurality of legs and a foot pedal connected between two of the plurality of legs, the foot pedal includes a pedal body and a pedal connector connected to both ends of the pedal body, the two legs are respectively provided with a plurality of adjustment holes, the plurality of adjustment holes are arranged opposite to each other on the two legs, the high chair also includes an adjusting member, the adjusting member respectively passes through the two pedal connectors and is inserted into two opposite adjustment holes among the plurality of adjustment holes, so as to fix the pedal body at a certain position between the two legs.

11. The high chair according to claim 2, characterized in that It also includes a dining tray portion detachably connected to the enclosure portion or the first backrest portion, the dining tray portion includes a dining tray body and a dining tray connecting portion protruding from the lateral sides of the dining tray body, the dining tray connecting portion is provided with a plug-in end, and the enclosure portion or the first backrest portion is provided with a plug-in groove that can be plugged and matched with the plug-in end.

12. A high chair, characterized in that: include: The first support frame comprises: multiple legs; and a seat frame connected to the upper ends of the legs; and A first seat plate, mounted on the first support frame; Wherein, the first support frame is provided with a backrest joint portion, and the backrest joint portion is used to connect with the first backrest assembly and the second backrest assembly. When the backrest joint portion is connected to the first backrest assembly, the high chair is in a first usage mode, when the backrest joint portion is connected to the second backrest assembly, the high chair is in a second usage mode, and when the backrest joint portion is not connected to the first backrest assembly and is not connected to the second backrest assembly, the high chair is in a third usage mode.

13. The high chair according to claim 12, characterized in that The back-supporting joint portion is a joint groove provided on the first support frame, and an extending direction of the joint groove is parallel to a plane where the first seat plate is located.

14. The high chair according to claim 13, characterized in that The first backrest assembly and the second backrest assembly share the engagement groove, and the engagement groove extends along the longitudinal direction of the first seat plate.

15. The high chair according to claim 13, characterized in that The engagement groove includes a first engagement groove for connecting with the first backrest component and a second engagement groove for connecting with the second backrest component. When the first engagement groove is not connected with the first backrest component and the second engagement groove is not connected with the second backrest component, the high chair is in a third usage mode.

16. The high chair according to claim 15, characterized in that Both the first joining groove and the second joining groove extend along the longitudinal direction of the first seat plate, and the second joining groove is spaced apart from the first joining groove in the transverse direction of the first seat plate; or the first joining groove extends along the longitudinal direction of the first seat plate, and the second joining groove extends along the transverse direction of the first seat plate.

17. The high chair according to claim 13, characterized in that The high chair also includes a footrest, which can be fixed at different height positions relative to the legs. When the high chair is in a first usage mode, the footrest is fixed at a first height position, when the high chair is in a second usage mode, the footrest is fixed at a second height position, and when the high chair is in a third usage mode, the footrest is fixed at a third height position.

18. A high chair, characterized in that: include: The second support frame comprises a first support frame and a second support frame, wherein one end of the first support frame is pivotally connected to one end of the second support frame; a second seat plate, disposed between the first supporting frame and the second supporting frame; a first backrest assembly, adapted to be detachably and pivotably connected to the second support frame, the first backrest assembly comprising a seat portion and a first backrest portion; as well as A second backrest assembly, adapted to be detachably connected to the second support frame; Wherein, the second support frame can be connected to one of the first backrest assembly and the second backrest assembly, when the first backrest assembly is installed on the second support frame and is located at a first pivot position, the high chair is in a first usage mode; when the first backrest assembly is installed on the second support frame and is located at a second pivot position, the high chair is in a second usage mode; when the second backrest assembly is installed on the second support frame, the high chair is in a third usage mode.

19. The high chair according to claim 18, characterized in that It also includes a pivot member, which is rotatably disposed on the second support frame, and one of the pivot member and the first backrest assembly is provided with a mounting recess, and the other is provided with a mounting protrusion, and the mounting recess and the mounting protrusion cooperate to rotatably mount the first backrest assembly to the second support frame.

20. The high chair according to claim 19, characterized in that It also includes a disassembly mechanism provided on the mounting protrusion, the disassembly mechanism comprising: A first operating member having a driving inclined surface; and A clamping member, movably disposed on the mounting protrusion, the clamping member has a second locking position and a second unlocking position, and the clamping member comprises a clamping body and a protruding column protruding from the clamping body; Wherein, a locking groove is provided in the mounting recess, and when the locking member is in the second locking position, the locking body is locked in the locking groove, and the first operating member can be operated to push the locking member to the second unlocking position through the driving inclined surface, and when the locking member is in the second unlocking position, the locking body is disengaged from the locking groove.

21. The high chair according to claim 20, characterized in that The disassembly mechanism further comprises a second reset member, and the second reset member is adapted to bias the engaging body to move toward the second locking position.

22. The high chair according to claim 19, characterized in that The two sides of the mounting protrusion are provided with limiting protrusions, and the two side walls of the mounting recess are provided with limiting grooves. When the mounting protrusion is inserted into the mounting recess, the limiting protrusion is correspondingly inserted into the limiting grooves.

23. The high chair according to claim 19, characterized in that One end of the first support frame has a first mounting seat, and one end of the second support frame has a second mounting seat. The first mounting seat and the second mounting seat are buckled to form a mounting cavity. The high chair also includes an angle adjustment mechanism, which includes: A limiting member is movably disposed in the installation cavity, the limiting member has a third locking position and a third unlocking position, and a first limiting portion is disposed at an edge of the limiting member; a second operating member, disposed on the first mounting seat and capable of moving along the axial direction of the first mounting seat; and A second limiting portion, fixed to the pivot member, at least a portion of the second limiting portion extends into the mounting cavity; Wherein, the pivot member is rotatably disposed on the second mounting seat, and when the limit member is in the third locking position, the second limit portion is engaged with the first limit portion, and the second operating member can be operated to push the limit member to move to the third unlocking position, and when the limit member is in the third unlocking position, the second limit portion is disengaged from the first limit portion.

24. The high chair according to claim 23, characterized in that The angle adjustment mechanism further comprises a third reset member, which is disposed between the second mounting seat and the limiting member, and is suitable for biasing the limiting member to move toward the third locking position.

25. The high chair according to claim 23, characterized in that The second mounting seat is provided with an arc-shaped limiting groove, and the second limiting portion extends into the mounting cavity through the limiting groove. When the pivoting member rotates relative to the second mounting seat, the second limiting portion moves along the limiting groove.

26. The high chair according to claim 18, characterized in that The second support frame also includes a first connecting frame and a second connecting frame, one side of the first connecting frame is pivotally connected to the first supporting frame, one side of the second connecting frame is pivotally connected to the second supporting frame, the other side of the first connecting frame is pivotally connected to the other side of the second connecting frame, the second seat plate is fixedly connected to the first connecting frame, and the second support frame can be switched between an expanded state and a folded state. When the second support frame is in the expanded state, the second seat plate is arranged above the first connecting frame and the second connecting frame.

27. The high chair according to claim 26, characterized in that It also includes a snap-fit ​​mechanism, the snap-fit ​​mechanism comprising: A first engaging portion operably disposed on the second seat plate; and A second engaging portion, disposed on a side of the second connecting frame away from the first connecting frame; The first engaging portion can engage with the second engaging portion to lock the second support frame in the expanded state, and the first engaging portion can be operated to disengage from the second engaging portion to release the lock of the second support frame in the expanded state.

28. A high chair comprising: The second support frame comprises a first support frame and a second support frame, wherein one end of the first support frame is pivotally connected to one end of the second support frame; a second seat plate, disposed between the first supporting frame and the second supporting frame; as well as A pivot member rotatably mounted on the second support frame, the pivot member being used to engage with the first backrest assembly and the second backrest assembly to achieve installation of the first backrest assembly and the second backrest assembly; When the first backrest assembly is mounted on the pivot member and the pivot member is in a first pivot position, the high chair is in a first usage mode; when the first backrest assembly is mounted on the pivot member and the pivot member is in a second pivot position, the high chair is in a second usage mode; and when the second backrest assembly is mounted on the pivot member, the high chair is in a third usage mode.

29. The high chair according to claim 28, characterized in that Also includes: A limit member is movably disposed on the second support frame, and the limit member has a third locking position and a third unlocking position. When the limit member is in the third locking position, it will limit the rotation of the pivot member relative to the second support frame. When the limit member is in the third unlocking position, the rotation restriction on the pivot member will be released, so that the pivot member can switch between the first pivot position and the second pivot position.

30. The high chair according to claim 28, characterized in that The pivot member is switchable between the first pivot position, the second pivot position and a third pivot position, and when the high chair is in the third use mode, the pivot member is in the third pivot position.

31. The high chair according to claim 30, characterized in that The first support frame is located forward of the high chair relative to the second support frame when the high chair is in the first and second use modes, and the first support frame is located rearward of the high chair relative to the second support frame when the high chair is in the third use mode.

32. The high chair according to claim 31, characterized in that The upper side of the second support frame is formed as a curved pipe, and when the high chair is in the third usage mode, the curved pipe serves as an armrest portion.

33. The high chair according to claim 31, characterized in that The second support frame is connected with a footrest, and when the high chair is in the third usage mode, the footrest is used to support the feet of the user.

Images