CN217365181U - Multifunctional children chair - Google Patents

Abstract

The utility model discloses a multifunctional children chair, which comprises a chair seat, a chair back, a detachable dinner plate and a detachable head washing part, wherein the chair back is rotationally connected with the chair seat, the chair back is configured to be positioned at a lying position, a sitting position and a folding position folded on the chair seat, and the chair back can be mutually switched among the lying position, the sitting position and the folding position; when the chair back is positioned at the lying position and the hair washing part is arranged at the front end of the chair back, the chair is used as a hair washing chair; when the chair back is positioned at the sitting position, the chair can be used as a common chair; when the back is in the sitting position and the tray is mounted on the seat, the chair can be used as a child dining chair. The chair has the functions of hair washing, dining chair and chair, realizes multiple purposes, and can be folded and stored.

Description

Multifunctional children chair

Technical Field

The utility model relates to a chair field especially relates to a multi-functional children's chair.

Background

The child chair is generally a child chair used by a baby during eating and resting to fix the posture of the baby and prevent the baby from falling off. The existing child chair is widely applied to families with children, but the existing child chair has single function, cannot meet various requirements of the children, and has a complex structure and large occupied space. Therefore, it is an urgent problem to be solved to modify the existing children's chair to expand its functionality without occupying more additional space.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a multifunctional children chair, which has the functions of hair washing, dining chair and chair, realizes multiple purposes and can be folded and stored.

The purpose of the utility model is realized by adopting the following technical scheme:

a multifunctional child chair comprises a seat, a backrest, a detachable dinner plate and a detachable head washing part, wherein the backrest is rotatably connected with the seat, the backrest is configured to be positioned at a lying position, a sitting position and a folding position folded on the seat, and the backrest can be mutually switched among the lying position, the sitting position and the folding position; when the chair back is positioned at the lying position and the hair washing part is arranged at the front end of the chair back, the chair serves as a hair washing chair; when the chair back is positioned at the sitting position, the chair can be used as a common chair; when the back is in the sitting position and the tray is mounted on the seat, the chair can be used as a child dining chair.

Furthermore, a positioning mechanism is arranged between the chair back and the chair seat and comprises a positioning part and a positioning rod, the positioning part is fixedly arranged at the rear part of the chair seat, one end of the positioning rod is rotatably connected to the back of the chair back, and a first locking structure used for enabling the chair back to be locked at a sitting position is arranged between the other end of the positioning rod and the positioning part.

Furthermore, the first locking structure comprises a positioning clamping groove arranged at the other end of the positioning rod, a buckle arranged on the inner side wall of the positioning clamping groove and a clamping hole formed in the side wall of the positioning part, the positioning clamping groove can be clamped with the positioning part, and the buckle can form a buckling relation with the clamping hole.

Further, the lower part of the back of the chair articulates the rear portion of seat support, the back of the chair can rotate around using the articulated shaft between the folding position of lying position, position of sitting and folding on the seat support, be equipped with on the seat support with first hinge hole and the second hinge hole of articulated shaft mutually supporting, first hinge hole and second hinge hole communicate each other, work as when the articulated shaft is located first hinge hole, the back of the chair can be in the position of lying and the position of sitting switch over each other, work as when the articulated shaft is located the second hinge hole, the back of the chair can be folded on the seat support.

Further, the both sides of seat support upwards extend respectively and are formed with the handrail baffle, the handrail baffle outside is equipped with a plurality ofly along length direction and is equipped with the card protruding, the dinner plate be equipped with the protruding corresponding bayonet socket of card, the dinner plate with the seat support through the card protruding with bayonet socket looks joint realizes demountable installation and connects.

Further, the back of the chair has the smooth binding face that is used for supplying the back to lean on in the position of lying, smooth binding face laminates with children back curve mutually, the streamline arc structure of low back is personally submitted in the smooth binding, the rear portion of seat support with back of the chair rounding off, the anterior downwarping of seat support forms the arc and holds in the palm the shank face.

Further, the back of the chair is close to the position of washing head portion is equipped with telescopic pillow and holds in the palm the subassembly, the pillow holds in the palm the subassembly and includes the supporting part, sets up the headrest on the supporting part and sets up the connecting rod on the supporting part, the headrest has towards the pillow of the direction downward sloping of washing head portion holds in the palm the cambered surface, the back of the chair is equipped with the pillow that is used for the holding to hold in the palm the recess, the pillow holds in the palm the recess and is equipped with an opening, the connecting rod stretches into realize flexible regulation in the opening, the connecting rod with be equipped with between the back of the chair and be used for with the second locking structure on the back of the chair is fixed to the connecting rod.

Furthermore, the front part of the chair back is provided with a jack, the head washing part is provided with an insert rod, the head washing part and the chair back are detachably mounted and connected in a mode that the insert rod is matched with the jack, and a third locking structure for fixing the head washing part on the chair back is arranged between the head washing part and the chair back; the washing head part is provided with a hanging hole, and the chair back is provided with a hanging bracket matched with the hanging hole.

Further, the seat back includes seat back support legs, upper ends of the seat back support legs rotatably connected to a back of the seat back, the seat back support legs configured to be positioned in an unfolded position and a folded position folded over the seat back; and a fourth locking structure for locking the chair back supporting legs at the folding positions is arranged between the chair back and the chair back supporting legs.

Further, a first accommodating groove is formed at the bottom of the seat, the seat comprises two pairs of splayed legs, the upper ends of the legs are rotatably connected with the bottom of the seat, the legs are configured to be positioned at an unfolding position and a folding position folded on the seat, and the legs can be folded and placed in the first accommodating groove; the hair washing part can be at least partially arranged in the first accommodating groove.

Compared with the prior art, the beneficial effects of the utility model reside in that:

in the utility model, the function of the hair washing chair is realized by positioning the chair back at the lying position and installing the hair washing part at the front end of the chair back, and the function of the chair is realized by positioning the chair back at the sitting position; the chair seat is matched with a dinner plate to realize the function of the dining chair; the multifunctional chair has multiple purposes, the use cost of the chair is reduced, and the experience of a user is improved; in addition, when the chair is stored or carried, the chair back is folded on the chair seat, thereby greatly reducing the storage space.

Drawings

Fig. 1 is a schematic view illustrating a multifunctional child chair provided by the present invention used as a hair washing chair;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of a multifunctional child chair provided by the present invention used as a seat;

FIG. 4 is a schematic view of a multifunctional chair for children as a dining chair;

FIG. 5 is an exploded view of FIG. 4;

fig. 6 is a schematic view of a chair back of a multifunctional children chair provided by the present invention in a folded position;

FIG. 7 is an exploded view of the head washing unit, the seat back and the seat, wherein at least a portion of the head washing unit is inserted into the first receiving recess;

fig. 8 is a schematic view of a seat of a multifunctional children's chair according to the present invention;

fig. 9 is a second schematic view of a seat of the multifunctional children's chair according to the present invention;

fig. 10 is a schematic view of a backrest of a multifunctional children's chair according to the present invention;

fig. 11 is a second schematic view of a backrest of a multifunctional children's chair according to the present invention;

fig. 12 is a schematic view illustrating a chair back of a multifunctional child chair according to the present invention positioned in a sitting position;

FIG. 13 is an enlarged view of a portion of FIG. 12 at A;

FIG. 14 is an enlarged partial view of FIG. 12 at B;

fig. 15 is a sectional view of a pillow assembly of a multifunctional children's chair according to the present invention;

FIG. 16 is a schematic view illustrating a use state of the multifunctional chair for children for washing head;

in the figure: 10. a chair seat; 100. an arc-shaped leg supporting surface; 101. a chair leg; 1010. a first rotating shaft; 102. a first accommodating recess; 103. a first hinge hole; 104. a second hinge hole; 105. a positioning part; 106. a clamping hole; 107. a first shaft hole; 108. a handrail baffle; 109. clamping convex; 20. a chair back; 200. a smooth binding face; 201. chair back support legs; 2010. convex edges; 202. hinging a shaft; 203. a second shaft hole; 204. a hook; 205. a jack; 206. a pillow support groove; 207. an opening; 208. positioning a rod; 2080. buckling; 2081. positioning the clamping groove; 209. a suspension bracket; 30. washing the head; 301. inserting a rod; 302. a hanging hole; 303. a sealing plug; 40. a pillow support assembly; 400. a pillow support cambered surface; 401. a support portion; 402. a headrest; 403. a connecting rod; 404. positioning holes; 50. a dinner plate; 501. and (4) a bayonet.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "one," "another," and the like are used to distinguish similar elements, and these terms and other similar terms are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. Corresponding reference numerals are used throughout the figures to indicate corresponding or corresponding elements (e.g., elements identified as "1 XX" and "2 XX" are structurally identical and functionally similar).

As shown in fig. 1-16, for the present invention, a multifunctional children's chair comprises a seat 10, a backrest 20, a detachable dinner plate 50 and a detachable washing head 30, wherein the backrest 20 is rotatably connected to the seat 10, the backrest 20 is configured to be positioned at a lying position, a sitting position and a folded position folded on the seat 10, and the backrest 20 can be switched among the lying position, the sitting position and the folded position; when the seat back 20 is positioned in the lying position and the head washing unit 30 is mounted at the front end of the seat back 20, it is used as a hair washing chair; when the seat back 20 is positioned in the sitting position, it is used as a normal chair; when the back 20 is positioned in the sitting position and the tray 50 is mounted on the seat 10, it is used as a child's dining chair.

In the utility model, the function of the hair washing chair is realized by positioning the chair back 20 at the lying position and installing the head washing part 30 at the front end of the chair back 20, and the function of the chair is realized by positioning the chair back 20 at the sitting position; the chair seat 10 is matched with a dinner plate 50 for use, so that the function of the dining chair is realized; the multifunctional chair has multiple purposes, the use cost of the chair is reduced, and the experience of a user is improved; in addition, the backrest 20 is folded over the seat 10 during storage or carrying, which greatly reduces the storage space.

As a preferred embodiment, as shown in fig. 12, a positioning mechanism is provided between the backrest 20 and the seat 10, the positioning mechanism includes a positioning portion 105 and a positioning rod 208, the positioning portion 105 is fixedly disposed at the rear portion of the seat 10, one end of the positioning rod 208 is rotatably connected to the back of the backrest 20, and a first locking structure for locking the backrest 20 in the sitting position is provided between the other end of the positioning rod 208 and the positioning portion 105. In the embodiment, when the user does not need to wash his/her hair, the backrest 20 is switched from the lying position to the sitting position, and the backrest 20 is locked in the sitting position by the first locking structure, so that the backrest 20 can be fixed forward, and the user can lean on his/her back to have the function of a common chair. The switching operation between the sitting position and the reclining position of the seatback 20 of the present embodiment is simple, and the first locking structure is only required to be operated to freely switch the sitting position and the reclining position.

As a preferred embodiment, as shown in fig. 14, the first locking structure includes a positioning groove 2081 disposed at the other end of the positioning rod 208, a buckle 2080 disposed on an inner sidewall of the positioning groove 2081, and a fastening hole 106 disposed on a sidewall of the positioning portion 105, the positioning groove 2081 can be fastened to the positioning portion 105, and the buckle 2080 can form a fastening relationship with the fastening hole 106. Of course, the first locking structure may also be other locking structures, such as a locking structure of a pin and a hole 205, a mortise structure, etc., and is not limited herein.

As a preferred embodiment, as shown in fig. 8 and 10, the lower portion of the backrest 20 is hinged to the rear portion of the seat 10, the backrest 20 can rotate about a hinge shaft 202 between a lying position, a sitting position and a folded position folded on the seat 10, the seat 10 is provided with a first hinge hole 103 and a second hinge hole 104 engaged with the hinge shaft 202, the first hinge hole 103 and the second hinge hole 104 are communicated with each other, the backrest 20 can be switched between the lying position and the sitting position when the hinge shaft 202 is located in the first hinge hole 103, and the backrest 20 can be folded on the seat 10 when the hinge shaft 202 is located in the second hinge hole 104.

In this embodiment, by providing the first hinge hole 103 and the second hinge hole 104 which are communicated with each other, and the hinge shaft 202 can move between the first hinge hole 103 and the second hinge hole 104, the chair back 20 can be conveniently switched between the lying position, the sitting position and the folding position, and the chair has the characteristics of simple structure and convenient operation.

As a preferred embodiment, as shown in fig. 4-5, two sides of the seat 10 respectively extend upward to form an armrest baffle 108, a plurality of locking protrusions 109 are arranged outside the armrest baffle 108 along the length direction, the dinner plate 50 is provided with a bayonet 501 corresponding to the locking protrusions 109, and the dinner plate 50 and the seat 10 are detachably connected by the locking protrusions 109 and the bayonet 501.

In this embodiment, the dinner plate 50 is installed on the arm-rest baffle 108 of the chair seat 10, and the dinner plate 50 and the arm-rest baffle 108 are fixed on the chair seat 10 by the bayonet 501 and the clamping protrusion 109, so as to realize the function of the dining chair, and the assembly and disassembly are simple and convenient. The arrangement of the plurality of locking projections 109 can adjust the distance of the dinner plate 50. In addition, the design of the seat 10 in cooperation with the armrest baffle 108 can prevent the child from turning over, and meanwhile, a certain protection effect is achieved; in addition, an elastic stopping portion is arranged on the locking protrusion 109, and the elastic stopping portion can stop the bayonet 501 from being separated from the locking protrusion 109.

The handrail baffle 108 of the embodiment is preferably in an arch structure, the handrail baffle 108 has a smooth arc surface, and the handrail baffle 108 in the arch structure prevents children from being scratched, which is beneficial to improving safety. Handrail baffle 108 with seat support 10 is structure as an organic whole, wherein the baffle with seat support 10 can be through injection moulding, and the associativity of the two is good like this, and wholeness intensity is high to handrail baffle 108 position keeps fixed, facilitates the use, improves the convenience of use, also can not be in disorder during the transportation simultaneously, the convenient transportation.

In a preferred embodiment, the backrest 20 has a smooth abutting surface 200 for the back of the child to lean against in the lying position, the smooth abutting surface 200 abuts against the curve of the back of the child, the smooth abutting surface 200 has a streamline arc structure with a high front and a low back, the rear portion of the seat 10 smoothly transitions with the backrest 20, and the front portion of the seat 10 is bent downward to form an arc-shaped leg supporting surface 100.

In this implementation, when the back of the chair 20 is in the position of lying, the smooth binding face 200 of the back of the chair 20 is laminated with children's back curve mutually, and smooth binding face 200 is the streamline arc structure of low back-high before being, when children lie on back the hair wash, the head is higher than the buttock, the buttock is sunken, the shank is leaned on the arc and is held in the palm on leg face 100, fine confession back of the waist and shank lean on, alleviate the fatigue of hairdressing, can also prevent the water reflux, the comfort level of lying on back has been improved, thereby improve the experience degree of hairdressing.

As a preferred embodiment, as shown in fig. 15, a retractable pillow assembly 40 is disposed at a position of the seat back 20 close to the head washing portion 30, the pillow assembly 40 includes a support portion 401, a headrest 402 disposed on the support portion 401, and a connecting rod 403 disposed on the support portion 401, the headrest 402 has a pillow arc 400 inclined downward toward the head washing portion 30, the seat back 20 is provided with a pillow recess 206 for accommodating the pillow assembly 40, the pillow recess 206 is provided with an opening 207, the connecting rod 403 extends into the opening 207 to achieve retractable adjustment, and a second locking structure for fixing the connecting rod 403 on the seat back 20 is disposed between the connecting rod 403 and the seat back 20.

In the embodiment, the pillow support assembly 40 is arranged, so that the neck can be supported and protected during hair washing, and the comfort level of hair washing is improved; by providing the pillow recess 206, it is convenient to accommodate the pillow assembly 40, and at the same time, the upper surface of the pillow assembly 40 and the smooth attachment surface 200 of the backrest 20 are flush with each other. The headrest 402 has a pillow support arc surface 400 to prevent water from flowing back to the face and ears; pillow support assembly 40 sets up to adjustable to fix pillow support assembly 40 in a certain position through second locking structure, be applicable to the different children of age bracket, the practicality is stronger.

In addition, the headrest 402 of the embodiment is made of a soft plastic material, so that the headrest 402 has certain elasticity, and thus, a user can comfortably push the head or the neck against the headrest 402, thereby improving the comfort of hair washing; the headrest 402 is detachably connected with the supporting portion 401, so that the headrest 402 is convenient to replace.

The utility model discloses in, the embodiment of second locking structure is shown, and second locking structure is including setting up the first elastic bulge behind the back of the chair back 20 and setting up a plurality of locating holes 404 on connecting rod 403, and wherein, a plurality of locating holes 404 evenly set up along the length direction of connecting rod 403, and first elastic bulge can block into in the locating hole 404 in order to realize the locking of pillow support subassembly 40. Of course, the second locking structure may also be other locking structures, such as a locking structure of a pin and a socket 205, a mortise and tenon locking, and the like, which is not limited herein.

As a preferred embodiment, the front portion of the seat back 20 is provided with an insertion hole 205, the shampoo section 30 is provided with an insertion rod 301, the shampoo section 30 and the seat back 20 are detachably mounted and connected in a manner that the insertion rod 301 is matched with the insertion hole 205, and a third locking structure for fixing the shampoo section 30 on the seat back 20 is arranged between the shampoo section 30 and the seat back 20; the head washing part 30 is provided with a hanging hole 302, and the chair back 20 is provided with a hanging bracket 209 matched with the hanging hole 302.

In this embodiment, the shampoo portion 30 can be dismantled with the back of the chair 20 through the matched with mode of inserted bar 301 and jack 205 and be connected, on the one hand be convenient for assemble and dismantle, compare traditional shampoo portion 30 and back structure as an organic whole, the utility model discloses can change the shampoo portion 30 of different specifications in a flexible way, the flexibility is stronger. In addition, due to the detachable structure of the 30-position head washing part, a user can use the head washing part flexibly according to own requirements, for example, the head washing part 30 can be inserted into the chair back 20 for use, as shown in fig. 3, the head washing part 30 can also be detached from the chair back 20 and placed on the ground for use, as shown in fig. 16, different requirements of the user are met, and the flexibility is high. The head washing part 30 of the embodiment is further provided with a drain hole, the drain hole is provided with a sealing plug 303, and the drain hole can be connected with a drain pipe so as to facilitate drainage, save a water pouring process and reduce labor intensity. When the head washing is not needed, the chair back 20 is switched to the sitting position, and the head washing part 30 is hung on the hanging bracket 209, so that the head washing part 30 is convenient to store on one hand, and the occupied space of the head washing part 30 is reduced on the other hand.

The utility model discloses in, showing the embodiment of third locking structure, third locking structure is including setting up the second elastic bulge behind the back of the chair 20 and setting up the locking hole on inserted bar 301, and the second elastic bulge can block into in the locking hole in order to lock head washing portion 30 on the back of the chair 20, prevents that head washing portion 30 from dropping easily. Of course, the third locking structure may also be other locking structures, such as a locking structure of a pin and a socket 205, a mortise and tenon locking, and the like, which is not limited herein.

As a preferred embodiment, as shown in fig. 1, the seat back 20 includes seat back support legs 201, the upper ends of the seat back support legs 201 are rotatably connected with the back of the seat back 20, and the seat back support legs 201 are configured to be positioned at an unfolded position and a folded position folded on the seat back 20; a fourth locking structure for locking the chair back supporting legs 201 at the folding position is arranged between the chair back 20 and the chair back supporting legs 201.

In the present embodiment, when the seatback 20 is positioned in the lying position, the seatback support legs 201 are switched from the folded position to the unfolded position to stably support the seatback 20 by the seatback support legs 201. When the seat back 20 is positioned in the folded position, the seat back support legs 201 are switched from the unfolded position to the folded position, so that the seat back support legs 201 are hidden inside the seat back 20, and the occupied space is greatly reduced. The back of the chair supporting leg 201 of this embodiment is the U font, and the opening 207 end orientation of U font back of the chair supporting leg 201 the back of the chair 20, the back of the chair supporting leg 201 of U font is favorable to improving the stability of supporting.

The utility model discloses in, as shown in fig. 12 and 13, the embodiment of fourth locking structure is shown, and fourth locking structure is including setting up pothook 204 behind the back of the chair 20 and setting up protruding stupefied 2010 on back of the chair supporting leg 201, and when folding the folding position on the back of the chair 20, pothook 204 forms the lock joint relation with protruding stupefied 2010 to lock back of the chair supporting leg 201 on the back of the chair 20, prevent that back of the chair supporting leg 201 from rocking at will. Of course, the fourth locking structure may also be other locking structures, such as a locking structure of a pin and a socket 205, a mortise and tenon locking, and the like, which is not limited herein.

As a preferred embodiment, a second rotating shaft and a second shaft hole 203 are arranged between the chair back supporting leg 201 and the chair back 20, the second rotating shaft is arranged on one of the chair back supporting leg 201 or the chair back 20, and the second shaft hole 203 is arranged on the other one; the upper ends of the chair back supporting legs 201 are rotatably connected with the back of the chair back 20 through the rotation matching of the second rotating shaft and the second shaft hole 203. Of course, the chair back support legs 201 and the chair back 20 can be rotatably connected through other structures, which are not specifically limited herein, as long as the chair back support legs 201 and the chair back 20 can be rotatably connected.

As a preferred embodiment, as shown in fig. 6 and 9, a first receiving groove 102 is formed at the bottom of the seat 10, the seat 10 includes two pairs of splayed legs 101, the upper ends of the legs 101 are rotatably connected to the bottom of the seat 10, the legs 101 are configured to be positioned at an unfolded position and a folded position folded on the seat 10, and the legs 101 can be folded in the first receiving groove 102; the head washing unit 30 can be at least partially placed in the first receiving recess 102

In this embodiment, since the legs 101 are rotatably connected to the seat 10, the legs 101 can be folded and stored in the first receiving groove 102, and then the legs 101 are hidden in the seat 10, so as to reduce the occupied space of the seat 10. When the seat is stored or transported, the head washing part 30 is detached from the chair back 20, and the head washing part 30 can be at least partially arranged in the first accommodating groove 102, so that the space occupied by the head washing part 30 can be reduced, the occupied space of the whole head washing chair is greatly reduced, and the storage space and goods transportation space are reduced. In addition, the splayed legs 101 can stably support the seat 10; the chair legs 101 of the embodiment are all hollow structures, so that the chair is light in weight and convenient to carry and transport.

As a preferred embodiment, as shown in fig. 9, a first rotating shaft 1010 and a first shaft hole 107 are provided between the leg 101 and the seat 10, the first rotating shaft 1010 is provided on one of the leg 101 and the seat 10, and the first shaft hole 107 is provided on the other; the upper ends of the legs 101 are rotatably connected to the bottom of the seat 10 through the first shaft 1010 and the first shaft hole 107. Of course, the legs 101 and the seat 10 can be rotatably connected by other rotating structures, which are not limited in particular, as long as the legs 101 and the seat 10 can be rotatably connected.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (10)

1. A multi-functional children's chair, comprising a seat (10), a back (20), a detachable tray (50), and a detachable head-washing portion (30), wherein the back (20) is pivotally connected to the seat (10), the back (20) is configured to be positioned in a flat-lying position, a sitting position, and a folded position folded onto the seat (10), and the back (20) is capable of being switched among the flat-lying position, the sitting position, and the folded position; when the seat back (20) is positioned in a lying position and the head washing part (30) is mounted at the front end of the seat back (20), the chair is used as a head washing chair; when the chair back (20) is positioned at a sitting position, the chair can be used as a common chair; when the chair back (20) is in the sitting position and the tray (50) is mounted on the seat (10), the chair is used as a child dining chair.

2. The multifunctional children's chair according to claim 1, wherein a positioning mechanism is disposed between the chair back (20) and the chair seat (10), the positioning mechanism comprises a positioning portion (105) and a positioning rod (208), the positioning portion (105) is fixedly disposed at the rear portion of the chair seat (10), one end of the positioning rod (208) is rotatably connected to the back of the chair back (20), and a first locking structure for locking the chair back (20) in a sitting position is disposed between the other end of the positioning rod (208) and the positioning portion (105).

3. The multifunctional children chair according to claim 2, wherein the first locking structure comprises a positioning clamp groove (2081) disposed at the other end of the positioning rod (208), a buckle (2080) disposed on an inner sidewall of the positioning clamp groove (2081), and a buckle hole (106) disposed on a sidewall of the positioning portion (105), the positioning clamp groove (2081) can be clamped with the positioning portion (105), and the buckle (2080) can form a buckling relationship with the buckle hole (106).

4. Multifunctional children's chair according to claim 1, characterized in that the lower part of the back (20) is hinged at the rear part of the seat (10), the back (20) being able to rotate about a hinge axis (202) between a lying position, a sitting position and a folded position folded onto the seat (10), the seat (10) being provided with a first (103) and a second (104) hinge hole cooperating with the hinge axis (202), the first (103) and second (104) hinge holes being in communication, the back (20) being able to be switched between the lying position and the sitting position when the hinge axis (202) is located in the first hinge hole (103), the back (20) being able to be folded onto the seat (10) when the hinge axis (202) is located in the second hinge hole (104).

5. The multifunctional children's chair according to claim 1, wherein the two sides of the seat (10) are respectively extended upwards to form arm guard (108), a plurality of clamping protrusions (109) are arranged outside the arm guard (108) along the length direction, the dinner plate (50) is provided with bayonets (501) corresponding to the clamping protrusions (109), and the dinner plate (50) and the seat (10) are connected in a detachable mode through the clamping protrusions (109) and the bayonets (501).

6. A multi-functional children's chair according to claim 1, wherein the backrest (20) has a smooth abutting surface (200) for the back of the waist to lean against in the flat lying position, the smooth abutting surface (200) is curved to abut against the back of the children, the smooth abutting surface (200) has a streamline arc structure with a high front and a low back, the rear portion of the seat (10) is smoothly transited to the backrest (20), and the front portion of the seat (10) is bent downward to form an arc-shaped leg supporting surface (100).

7. Multifunctional children's chair according to claim 1, characterized in that said backrest (20) is provided with a retractable pillow assembly (40) adjacent to said head-washing portion (30), the pillow support component (40) comprises a support part (401), a headrest (402) arranged on the support part (401) and a connecting rod (403) arranged on the support part (401), the headrest (402) has a pillow support arc surface (400) inclined downward toward the head washing part (30), the chair back (20) is provided with a pillow support groove (206) for accommodating the pillow support component (40), the pillow support groove (206) is provided with an opening (207), the connecting rod (403) extends into the opening (207) to realize telescopic adjustment, and a second locking structure for fixing the connecting rod (403) on the chair back (20) is arranged between the connecting rod (403) and the chair back (20).

8. The multifunctional children's chair according to claim 1, wherein the front portion of the chair back (20) is provided with an insertion hole (205), the head washing unit (30) is provided with an insertion rod (301), the head washing unit (30) and the chair back (20) are detachably mounted and connected in a manner that the insertion rod (301) is matched with the insertion hole (205), and a third locking structure for fixing the head washing unit (30) on the chair back (20) is arranged between the head washing unit (30) and the chair back (20); the washing head part (30) is provided with a hanging hole (302), and the chair back (20) is provided with a hanging bracket (209) matched with the hanging hole (302).

9. The multi-function children's chair of claim 1, wherein the chair back (20) includes chair back support legs (201), the upper ends of the chair back support legs (201) being pivotally connected to the back of the chair back (20), the chair back support legs (201) being configured to be positioned in an unfolded position and a folded position folded over the chair back (20); a fourth locking structure for locking the chair back supporting legs (201) at the folding position is arranged between the chair back (20) and the chair back supporting legs (201).

10. A multifunctional children's chair according to claim 1, wherein the bottom of the seat (10) is formed with a first receiving groove (102), the seat (10) comprises two pairs of splayed legs (101), the upper ends of the legs (101) are rotatably connected with the bottom of the seat (10), the legs (101) are configured to be positioned at an unfolded position and a folded position folded on the seat (10), the legs (101) can be folded in the first receiving groove (102); the head washing section (30) can be at least partially placed in the first receiving recess (102).

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