Learning-to-sit chair

Abstract

Disclosed in the present application is a learning-to-sit chair, including a base, a backrest structure and a limit structure, in which the backrest structure, the limit structure are symmetrically mounted at a top of the base, a cushion recess is defined in a center of the base, the backrest structure is arranged around the edge of the cushion recess, a legrest portion is protrudently disposed on a side of the base away from the backrest structure, and the limit structure is mounted at a top of the legrest portion.

Claims

1. A learning-to-sit chair, comprising: a base, a backrest structure and a limit structure, wherein the backrest structure is positioned opposite and space apart from the limit structure at a top of the base, a cushion recess is defined on a center of the base, the backrest structure is arranged along a portion of an edge of the cushion recess, a legrest portion is convexly disposed at a side of the base away from the backrest structure, and the limit structure is mounted at a top of the legrest portion, wherein all of the base, the limit structure and the backrest structure are provided with an anti-slipping layer, or all of the backrest structure, the legrest portion, and an inner wall of the cushion recess are provided with the anti-slipping layer, wherein the anti-slipping layer is an anti-slipping coating, and wherein the anti-slipping coating comprises the following components in parts by weight: TABLE-US-00005 aqueous epoxy acrylates 46-63 parts; anti-slipping filler 18-25 parts; aqueous curing agent 3-5 parts; and water 7-33 parts.

2. The learning-to-sit chair according to claim 1, wherein at least one airhole is defined in a bottom of the base corresponding to the cushion recess.

3. The learning-to-sit chair according to claim 1, wherein at least one anti-slipping groove is defined in both of an inner side and an outer side of the backrest structure, and the at least one anti-slipping groove is arranged along a length direction of the backrest structure.

4. The learning-to-sit chair according to claim 1, wherein the limit structure is a cylindrical inflatable structure, a top of the limit structure is provided with a first inflation valve, the limit structure is inflated by the first inflation valve, the top of the legrest portion is provided with a second inflation valve, and the base is inflated by the second inflation valve.

5. The learning-to-sit chair according to claim 1, wherein the backrest structure is provided with a third inflation valve, and the backrest structure is inflated by the third inflation valve.

6. The learning-to-sit chair according to claim 1, further comprising a head protection structure, and a side of the backrest structure away from the base is connected to a bottom of the head protection structure.

7. The learning-to-sit chair according to claim 6, wherein the head protection structure is an inflatable structure, and a ventilation hole for communicating with the head protection structure is defined in the backrest structure.

8. The learning-to-sit chair according to claim 1, wherein the backrest structure is provided with a deflating valve.

9. The learning-to-sit chair according to claim 1, wherein a bottom of the base is detachably mounted with an auxiliary member.

10. The learning-to-sit chair according to claim 9, wherein the auxiliary member is an anti-slipping silicone rubber sheet.

11. The learning-to-sit chair according to claim 1, wherein the anti-slipping filler comprises the following components in parts by weight: TABLE-US-00006 anti-slipping filler with particle size of 50-100 nm 5-10 parts; anti-slipping filler with particle size of 1-20 ?m 12-18 parts; and anti-slipping filler with particle size of 50-80 ?m 25-35 parts.

12. The learning-to-sit chair according to claim 11, wherein the anti-slipping filler comprises the following components in parts by weight: TABLE-US-00007 D,L-polylactide 2-5 parts; ethylene methacrylate glyceride copolymer 5-10 parts; silicone resin 8-15 parts; biobased polyurethane 3-8 parts; and fiber powder 10-20 parts.

13. The learning-to-sit chair according to claim 12, wherein the fiber powder comprises one or a combination of more components selected from a group consisting of chitosan fiber powder, seaweed fiber powder, soy protein composite fiber and milk protein fiber powder.

14. The learning-to-sit chair according to claim 13, wherein the fiber powder is a composition of the chitosan fiber powder, the seaweed fiber powder, the soy protein composite fiber and the milk protein fiber powder in a weight ratio of 1:(0.3-0.8):(0.1-0.3):(1.5-2.8).

15. The learning-to-sit chair according to claim 13, wherein the fiber powder is a composition of the soy protein composite fiber, the milk protein fiber powder, the chitosan fiber powder and the seaweed fiber powder in a weight ratio of 1:(0.8-1.7):(0.1-0.5):(1-3).

16. The learning-to-sit chair according to claim 12, wherein the anti-slipping filler is prepared by the following method: weighing and mixing 2-5 weight parts of the D,L-polylactide, 5-10 weight parts of the ethylene methacrylate glyceride copolymer, 8-15 weight parts of the silicone resin, 3-8 weight parts of the biobased polyurethane and 10-20 weight parts of the fiber powder uniformly, heating to 120-130? C., stirring for 10-30 min at a stirring speed of 100-300 r/min, heating to 150-160? C., stirring for 10-30 min, cooling to room temperature, grinding and sieving to obtain the anti-slipping filler with particle size of 50-100 nm, the anti-slipping filler with particle size of 1-20 ?m and the anti-slipping filler with particle size of 50-80 ?m, respectively.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic structure diagram of a learning-to-sit chair according to Embodiment 1.

(2) FIG. 2 is a top view of the learning-to-sit chair according to Embodiment 1.

(3) FIG. 3 is a partial exploded view of the learning-to-sit chair according to Embodiment 1.

(4) FIG. 4 is an exploded view of a learning-to-sit chair according to Embodiment 2.

(5) FIG. 5 is a structural view of a learning-to-sit chair according to Embodiment 3.

(6) FIG. 6 is a structural view of the learning-to-sit chair according to Embodiment 4.

DETAILED DESCRIPTION

(7) The present application is further described in detail below in combination with FIGS. 1-6.

Embodiment 1

(8) The present application discloses a learning-to-sit chair. Referring to FIG. 1 and FIG. 2, it includes a base 1, a backrest structure 2, a limit structure 3 and a head protection structure 4, all of the base 1, the backrest structure 2, the limit structure 3 and the head protection structure 4 are integrally-formed air cushion structures. A cushion recess 11 is defined in a center of a top surface of the base 1, and a bottom surface of the backrest structure 2 is fixed to an edge of the base 1 close to the cushion recess 11. A recess wall of the cushion recess 11 and a top surface of the base 1 are transited by an arc-shaped surface, forming ergonomics structures conformal with a buttock of a human body. At least one airhole 111 is defined in the base 1 corresponding to the cushion recess 11, and a number of the airholes 111 can be 1, 2, 3, 4, 5, etc., preferably 4 in the present embodiment. The airhole 111 can not only play a role of ventilation, but also avoid reducing use comfort due to water accumulated in the cushion recess 11 when a child or an infant is bathing.

(9) A side of the base 1 away from the backrest structure 2 is convexly provided with a legrest portion 12, the limit structure 3 is mounted at a top of the legrest portion 12, so that an overall appearance of the base 1 assumes a shape of water drop. Further, a surface size of the legrest portion 12 is gradually increased from a side close to the backrest structure 2, and the legrest portion 12 and the backrest structure 2 are symmetrically arranged about an axis. Due to the providing of the above legrest portion 12, when an infant sits on the learning-to-sit chair, an inner side of a knee portion on two legs and a shank of the infant contact an outer side edge of the legrest portion 12, so that two legs are hung over the learning-to-sit chair, and subjected to a downward g-force, which renders it difficult for the infant to fall off or slide down, improving safety of the learning-to-sit chair.

(10) The limit structure 3 is preferably a cylindrical inflatable structure, a top of the limit structure 3 is provided with a first inflation valve 31, the limit structure 3 is inflated by the first inflation valve 31, a top of the base 1 corresponding the legrest portion 12 is provided with a second inflation valve 13, and the base 1 is inflated by the second inflation valve 13. Each of the first inflation valve 31 and the second inflation valve 13 is a unidirectional switch value, so that the learning-to-sit chair can be inflated by pressing an inflatable limit column; and air inside the limit structure 3 can enter the base 1 through the first inflation valve 31.

(11) At least one anti-slipping groove 21 is defined in both of inner side and outer side of the backrest structure 2, and arranged along a length direction of the backrest structure 2. When a plurality of anti-slipping grooves 21 are provided, an anti-slipping ridge is formed between two adjacent anti-slipping grooves 21, and a wave-shaped curve is formed between the anti-slipping ridge and the anti-slipping groove 21. Due to the providing of the anti-slipping groove 21, backs of children or infants can be attached on the backrest structure 2, and a friction force between the backrest structure 2 and the back of children or infants can be increased, which reduces the possibility of falling off or sliding down the learning-to-sit chair when the infant is splashing and frolicking on the learning-to-sit chair.

(12) A third inflation valve 22 in air communication with the base 1 is mounted on a bottom of the backrest structure 2, which realizes inflation of the backrest structure 2 when air inside the base 1 flows into the third inflation valve 22 during inflating. In addition, the backrest structure 2 is mounted with a deflation value 24, which is configured for the learning-to-sit chair to deflate.

(13) Atop of the backrest structure 2 is connected to a bottom of the head protection structure 4, and an air vent 23 for communicating with the head protection structure 4 is defined in the backrest structure 2. When inflating, the air inside the backrest structure 2 flows into the inner space of the head protection structure 4.

(14) All of the first inflation valve 31, the second inflation valve 13 and the third inflation valve 22 are unidirectional inflation valves which facilitate inflating. The connections of the base 1 and the limit structure 3, the base 1 and the backrest structure 2, the backrest structure 2 and the head protection structure 4 can be achieved by adhesive glue, or by heating, so as to achieve heat lamination. Either of the above connections can provide a more stable learning-to-sit chair, and improve safety of the learning-to-sit chair.

(15) Implementing principle of a learning-to-sit chair in embodiment 1 of the present application is as follows.

(16) The base 1, the limit structure 3, the head protection structure 4 and the backrest structure 2 are integrally formed, respectively. A cushion recess 11 is defined in a center of the base 1; and a top of the limit structure 3 is mounted with a first inflation valve 31 for realizing inflation by air entering the limit structure 3 when being pressed. The legrest portion 12 on the base 1 is mounted with a second inflation valve 13, then the backrest structure 2 is fixed to the legrest portion 12 by a glue, in such a way that the second inflation valve 13 is aligned with an inner cavity of the limit structure 3, and the backrest structure 2 is fixed to the edge of the cushion recess 11, so that a central axis of the backrest structure 2 is arranged symmetrically relative to a central axis of the limit structure 3. By providing the air vent 23, the head protection structure 4 is adhered to the top of the limit structure 3 by glue. Then the deflation value 24 is mounted to obtain the learning-to-sit chair.

Embodiment 2

(17) Embodiment 2 differs from Embodiment 1 as follows. Referring to FIG. 3, the base 1 includes a base piece 15, a connection piece 16 and a top piece 17. The base piece 15 is connected to the top piece 17 by heat lamination via the connection piece 16, which are inflated to form the base 1. A cushion portion is provided on a center of the base piece 15 and the top piece 17. During the process of connecting by heat lamination, the centers of the base piece 15 and the top piece 17 are adhered together. After inflation, a cushion recess 11 is formed in both of the bottom and top of the base 1, and at least one holes is defined in the bottom of the base 1 corresponding to the cushion recess 11, by which two cushion recesses communicate with each other. A number of holes is one, four, five, six, or ten, preferably four holes in the present embodiment.

(18) The backrest structure 2 includes a lower waist protection piece 25, a waist protection cushion 26 and an upper waist protection piece 27. The lower waist protection piece 25 is connected to a bottom of the waist protection cushion 26 by glue, and the upper waist protection piece 27 is connected to the waist protection cushion 26 by glue, thereby being assembled to form the backrest structure 2. Other structures are the same as embodiment 1.

(19) Implementing principle of embodiment 2 is as follows. the base piece 15, the top piece 17 and the connection piece 16 are connected by heat fusing to form the base 1. The anti-slipping groove 21 is formed in the waist protection cushion 26 by heat-pressing, and the lower waist protection piece 25, the waist protection cushion 26 and the upper waist protection piece 27 are connected by heat fusing to form a waist protection structure, which is further connected and assembled with the head protection structure 4 and the limit structure 3 to obtain the final cushion recess 11. Other structures are the same as those in Embodiment 1.

Embodiment 3

(20) Embodiment 3 differs from embodiment 1 as follows. Referring to FIG. 5, the bottom of the base 1 is detachably mounted with an auxiliary member 14, which can be anti-slipping silicone rubber sheet having effects of anti-slipping and adhesion. The anti-slipping silicone rubber sheet is adhered to the bottom of the cushion, so that the auxiliary member 14 is adhered to the bottom of the base 1. When the anti-slipping silicone rubber sheet contacts the ground, the anti-slipping silicone rubber is adsorbed onto the ground, such that the learning-to-sit chair is fixed to the ground. For removing the chair, a large force is needed for separating the anti-slipping silicone rubber sheet from the ground, or separating the anti-slipping silicone rubber sheet from the bottom of the chair, which is beneficial to improving safety and convenience of the learning-to-sit chair.

Embodiment 4

(21) Embodiment 4 differs from Embodiment 1 as follows. Referring to FIG. 6, all of the outer surfaces of the base 1, the limit structure 3, and the backrest structure 2 are provided with an anti-slipping layer 5, or an inter wall of the cushion recess 11, the backrest structure 2, and the legrest portion 12 are provided with an anti-slipping layer 5. When using the infant chair, all of the area where the infant chair comes into contact with body are arranged with an anti-slipping layer 5. The present embodiment can be preferred an anti-slipping layer 5 arranged in areas that the infant chair comes into contact with body, which can play an anti-slipping role in the areas of contact, further can reduce waste of materials. Thickness of the anti-slipping layer 5 can be 0.01, 0.03, 0.05, 0.08, 0.1 mm, or the like, preferably 0.1 mm in the present embodiment.

Embodiment 5

(22) Embodiment 5 differs from Embodiment 4 in that anti-slipping layer of 0.1 mm was used as an anti-slipping coating.

(23) The anti-slipping coating was prepared by the following steps:

(24) Weighing and mixing 4.6 kg of aqueous epoxy acrylates, 1.8 kg of anti-slipping filler, 0.3 kg of aqueous curing agent and 3.3 kg of water, stirring at a rotary speed of 150 r/min for 30 min to obtain a mixture; applying the mixture on outer surface of the base, the limit structure and the backrest structure, heating to 80? C., and curing for 1 min to obtain the anti-slipping coating.

(25) In particular, the anti-slipping filler was obtained by the following methods:

(26) Weighing 0.5 kg of anti-slipping filler with particle size of 50-100 nm, 1.2 kg of anti-slipping filler with particle size of 1-20 m and 2.5 kg of anti-slipping filler with particle size of 50-80 m, and mixing evenly to obtain the anti-slipping filler.

(27) The anti-slipping filler was prepared by the following method:

(28) Weighing 2 kg of D,L-polylactide, 5 kg of ethylene methacrylate glyceride copolymer, 8 kg of ethyl MQ silicone resin, 3 kg of biobased polyurethane and 10 kg of fiber powder, mixing evenly, heating to 120? C., stirring for 30 min at a rotary speed of 120 r/min, heating to 150? C., stirring for 10 min, cooling to room temperature, grinding and sieving to obtain anti-slipping filler with particle size of 50-100 nm, anti-slipping filler with particle size of 1-20 m and anti-slipping filler with particle size of 50-80 m, respectively.

(29) The above fiber powder was seaweed fiber powder.

Embodiment 6

(30) Embodiment 6 differs from Embodiment 5 in that, the raw materials of the anti-slipping coating includes 5.4 kg of aqueous epoxy acrylates, 2.2 kg of anti-slipping filler, 0.4 kg of aqueous curing agent and 2 kg of water.

(31) The anti-slipping filler was prepared by the following method:

(32) Weighing 0.8 kg of anti-slipping filler with particle size of 50-100 nm, 1.5 kg of anti-slipping filler with particle size of 1-20 m and 3.0 kg of anti-slipping filler with particle size of 50-80 m, and mixing evenly to obtain the anti-slipping filler.

Embodiment 7

(33) Embodiment 7 differs from Embodiment 5 in that the raw materials of the anti-slipping coating includes 6.3 kg of aqueous epoxy acrylates, 2.5 kg of anti-slipping filler, 0.5 kg of aqueous curing agent and 0.7 kg of water.

(34) The anti-slipping filler was prepared by the following methods:

(35) Weighing 1 kg of anti-slipping filler with particle size of 50-100 nm, 1.8 kg of anti-slipping filler with particle size of 1-20 m and 3.5 kg of anti-slipping filler with particle size of 50-80 m, mixing evenly to obtain the anti-slipping filler.

Embodiment 8

(36) Embodiment 8 differs from Embodiment 6 in including 3 kg of D,L-polylactide, 8 kg of ethylene methacrylate glyceride copolymer, 12 kg of silicone resin, 5 kg of biobased polyurethane and 15 kg of fiber powder.

Embodiment 9

(37) Embodiment 9 differs from Embodiment 6 in including 5 kg of D,L-polylactide, 10 kg of ethylene methacrylate glyceride copolymer, 15 kg of silicone resin, 8 kg of biobased polyurethane and 20 kg of fiber powder.

Embodiment 10

(38) Embodiment 10 differs from Embodiment 8 in that, the fiber powder was prepared by mixing the chitosan fiber powder, the seaweed fiber powder, the soy protein composite fiber and the milk protein fiber powder in a weight ratio (kg) of 1:0.3:0.2:2.2 evenly, grinding and sieving through a mesh of 500.

Embodiment 11

(39) Embodiment 11 differs from Embodiment 8 in that, the fiber powder is prepared by mixing the soy protein composite fiber, the milk protein fiber powder, the chitosan fiber powder and the seaweed fiber powder in a weight ratio (kg) of 1:1.3:0.4:2 evenly, grinding and sieving through a mesh of 500.

Embodiment 12

(40) Embodiment 12 differs from Embodiment 5 in that the anti-slipping filler was an anti-slipping filler with particle size of 1-20 m.

Embodiment 13

(41) Embodiment 13 differs from Embodiment 5 in that ethyl MQ silicon resin was replaced with an equal amount of biobased polyurethane.

Embodiment 14

(42) Embodiment 14 differs from Embodiment 5 in that the fiber powder was replaced with an equal amount of silica.

(43) Experiment and Analysis

(44) Test of Anti-Slipping Effect

(45) Test samples were formed by cutting the legrest portions of the infant chairs of Embodiment 1 and Embodiment 5 to 14, and tested by the following performance tests, in which, Embodiment 1 was used as a control group, and the specific steps were as follow.

(46) Pendulum type friction coefficient measuring instrument was used for testing according to GB/T 10006. The principle was as follows. An upper end of the pendulum was mounted with a rubber slider of having specific hardness and elasticity. When being located at an unbalance position, the upper end of the pendulum will beat a surface of the tested samples at a constant speed, and a coefficient of friction is correspondingly obtained. In particular, liquid human-used silicone materials (available from Shenzhen Tianfuyang Technology Co., Ltd, a viscosity of 700 CPS at 25? C., having a soft touch close to human skin) were smeared on a surface of the rubber slider on the pendulum type friction coefficient measuring instrument. After being fully cured, film of 0.1 mm was formed on the surface of the rubber block, and a weight of the rubber slider with film was acquired and recorded as A1.

(47) The test was performed for 30 times, in which frictional coefficient was obtained and averaged by testing for the first 10 times. Frictional coefficient of Embodiment 1 is recorded as B1, frictional coefficients of Embodiments 5 to 14 were recorded as B2, and anti-slipping rate=[(B2?B1)/B1] *100%. After performing test for 30 times, the rubber block was removed, and weight of the rubber block of Embodiment 1 and Embodiments 5 to 14 was weighed by using a thousandth scale, and recorded as A2, where mass loss=[(A1?A2)/A1] *100%. The particular data is shown in Table 1.

(48) TABLE-US-00004 TABLE 1 Experiment data of Embodiment 1 and Embodiments 5 to 14 It can be seen from the above data that, mass loss of Embodiment 5 is less than that of Test item Mass loss (%) Anti-slipping rate (%) Embodiment 1 0.0011 0 Embodiment 5 0.0124 369.8 Embodiment 6 0.0105 374.7 Embodiment 7 0.0129 398.7 Embodiment 8 0.0089 388.5 Embodiment 9 0.0096 386.9 Embodiment 10 0.0058 407.4 Embodiment 11 0.0062 411.25 Embodiment 12 0.0093 219.8 Embodiment 13 0.0456 258.75 Embodiment 14 0.1687 422.3

(49) Embodiment 13, and anti-slipping rate of Embodiment 5 is higher than that of Embodiment 13, indicating that anti-slipping filler prepared by the raw materials of the present application has a better effects of anti-slipping and skin friendliness.

(50) Anti-slipping rate of Embodiment 5 is higher than that of Embodiment 12, indicating that filling with anti-slipping fillers with three kinds of particle size plays a better anti-slipping role.

(51) Mass loss of Embodiment 5 is less than that of Embodiment 14, indicating that filing with the fiber powder of the present application has a better effect of skin friendliness.

(52) The above are the preferred embodiments of the present application, which are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.